WO2000029540A1 - Ultrasonic cleaning compositions - Google Patents

Ultrasonic cleaning compositions Download PDF

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Publication number
WO2000029540A1
WO2000029540A1 PCT/US1999/027182 US9927182W WO0029540A1 WO 2000029540 A1 WO2000029540 A1 WO 2000029540A1 US 9927182 W US9927182 W US 9927182W WO 0029540 A1 WO0029540 A1 WO 0029540A1
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WO
WIPO (PCT)
Prior art keywords
alkyl
mixtures
ultrasonic cleaning
preferred
branched
Prior art date
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PCT/US1999/027182
Other languages
French (fr)
Inventor
Jean-François Bodet
William Michael Scheper
Kristen Lynne Mckenzie
Chandrika Kasturi
Original Assignee
The Procter & Gamble Company
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Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to BR9915733-0A priority Critical patent/BR9915733A/en
Priority to JP2000582524A priority patent/JP2002530484A/en
Priority to EP99963911A priority patent/EP1131401A1/en
Priority to CA002348936A priority patent/CA2348936A1/en
Priority to AU20252/00A priority patent/AU2025200A/en
Publication of WO2000029540A1 publication Critical patent/WO2000029540A1/en

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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0026—Low foaming or foam regulating compositions
    • C11D2111/46—

Definitions

  • Ultrasonic cleaning is a well known cleaning process in industry. For example, it is used to clean electronic components after or during immersion in cleaning solution such as azeotropic mixtures of flurohydrocarbons. It is also used domestically to a small extent in oral hygiene, as in ultrasonic tooth brushes. However, ultrasonic cleaning has not found much acceptance domestically beyond this limited application.
  • ADW compositions are low in surfactant, typically they contain about 1% or less of surfactant and have poor or low solubility. Consequently, the need remains for a ultrasonic cleaning composition, which is usable in any domestic ultrasonic cleaning application.
  • ultrasonic waves means mechanical pressure or stress waves which can propagate through any material media, wherein the frequency spectra of these waves can vary from a few cycles/second (Hz) to a few billion Hz.
  • the invention also encompasses processes by which such stains or soils are removed, either from localized regions or from the entire article to be cleaned.
  • the present application also includes methods of washing tableware and hard surfaces by either applying a neat or aqueous solution to the soil or stain, to be removed form the surface and the imparting ultrasonic waves to the soil or stain.
  • the present application also includes methods of washing tableware by contacting the tableware with an aqueous solution, such as by immersion in an aqueous solution, then imparting ultrasonic waves to said soiled tableware.
  • the surface be a hard surface.
  • a "hard surface” is any surface which is traditionally regarded as hard, that is tableware, such as plates, glasses, cutlery, pots and pans, and also includes other surfaces such as kitchen counter tops, sinks, glass, windows, enamel surfaces, metal surfaces, tiles, bathtubs, floors etc. More preferably, the hard surface is tableware.
  • the ultrasonic cleaning compositions, or UCC's, of the present invention comprise from about 0.001% to about 99%, preferably from about 0.01 % to about 90%), more preferably from about 0.1 % to about 80%, even more preferably from about 0.5% to about 75%, by weight of composition of an ultrasonic cleaning agent, wherein said composition is low foaming, has an inter facial tension of from about 10 mNm "1 to about 0.0001 mNm "1 , preferably from about 1 mNm "1 to about 0.0001 mNm "1 , more preferably from about 1 mNm "1 to about 0.001 mNm "1 and is substantially free antifoaming agents.
  • substantially free antifoaming agents it means that no antifoaming agents are added by the formulator.
  • antifoam it is meant silicone antifoams and fatty acid antifoaming agents.
  • trace amounts such as less than 0.5%, preferably less than 0.1 %, most preferably about 0%, which are present as impurities or the like, can be tolerated by the compositions of the present invention.
  • the compositions of the present invention be totally free, i.e. 0% of any antifoaming agents, either added by the formulator or present as impurities.
  • An ultrasonic cleaning composition comprises an ultrasonic cleaning agent.
  • This ultrasonic cleaning agent is any cleaning agent which is suitable for use in ultrasonic cleaning, that is, these ultrasonic cleaning agents when in the ultrasonic cleaning composition do not alter the physical characteristics of that composition outsides the essential parameters.
  • ultrasonic cleaning agents include builders, surfactants, enzymes, bleach activators, antibacterial agent, bleach catalysts, bleach boosters, bleaches, alkalinity sources, colorants, perfume, lime soap dispersants, polymeric dye transfer inhibiting agents, crystal growth inhibitors, photobleaches, heavy metal ion sequestrants, anti-tarnishing agents, anti-microbial agents, anti-oxidants, anti- redeposition agents, soil release polymers, electrolytes, pH modifiers, thickeners, abrasives, divalent metal ions, metal ion salts, enzyme stabilizers, corrosion inhibitors, diamines, suds stabilizing polymers, solvents, process aids, fabric softening agents, optical brighteners, hydrotropes. and mixtures thereof.
  • the ultrasonic cleaning compositions of the present invention are low foaming. That is the composition is formulated such that when ultrasonic waves or energy is applied to a neat or aqueous solution of the composition any foam generated with not interfere with the cleaning. It is preferred that the ultrasonic cleaning composition of the present invention have a suds height of less than about 80 mm, more preferably 50 mm according to the suds cylinder test, see hereinafter.
  • the solution is first agitated then subsequently challenged with portions of greasy soil with agitation between each subsequent soil addition.
  • the suds volume can be easily determined by using the vacant volume of the 2 L cylinder as a guide.
  • compositions of the present invention may be of any suitable form, such as liquid, tablet, paste, gel, aerosol or microemulsion.
  • the source of ultrasonic or sonic energy or waves can be from any suitable source.
  • a variety of sonic or ultrasonic sources can be used in the invention including, but not limited to, sonic cleaning baths typically used to clean jewelry and sonic toothbrushes for cleaning teeth. This includes basins or sinks, such as the Branson Ultrasonic Bath, ultrasonic "balls", which are dropped into a conventional sink or basin, such as the Sonic Wash Ball by "D&P Wash Machine", baskets or racks into which the item to be cleaned is placed ant this is then placed into a conventional sink or basin.
  • the source of ultrasonic energy could be provided by a modified ultrasonic tooth brush, such as the Teldyne Water Pik model SR-400R.
  • sonic or ultrasonic source is a, hand-held vibrational ultrasonic device with a cleaning head one distal end of said device. It is another preferred aspect that in ultrasonic cleaning product the cleaning composition and the sonic or ultrasonic source contained in together in a device that permits controlled dispensing of the cleaning composition to a hard surface in need of cleaning, while concurrently imparting sonic or ultrasonic waves thereto.
  • the acoustic system which generates the sonic or ultrasonic waves is made from a piezo ceramic element or elements, typically called PZTs, along with an acoustic amplifier, typically called an acoustic horn or acoustic transducer or sonotrode.
  • PZTs piezo ceramic element or elements
  • an acoustic amplifier typically called an acoustic horn or acoustic transducer or sonotrode.
  • the entire acoustic system is designed to operate at a specific frequency and power and deliver a predetermined amplitude at the end or tip of the sonotrode.
  • the combination of the sonotrode design, amplitude, frequency and power dictates the cleaning efficacy. Further, not all of the parameters are independently choosen.
  • the sonotrode With regards to the design of the sonotrode, a variety of different shapes provide improved cleaning benefits.
  • One specific embodiment is a "chisel" design, where the sonotrode is tapered at the end which will contact, or be proximate to, the stain/soil to be removed.
  • the width of the sonotrode is much less than its length.
  • the sonotrode may be 0.05 to 5 mm wide and the is 10 to 50 mm long.
  • cleaning is improved when the sonotrode is designed to deliver equal amplitude across the sonotrode blade.
  • there are other embodiments where having a higher localized amplitude is prefered.
  • it has surprisingly been found that a sonotrode blade in a "chisel" shape running at 50kHz, 30 Watts and 40 microns provides significant cleaning benefits.
  • sonotrodes designed in a "disc” or round shape deliver significant cleaning benefits.
  • This sonotrode embodiment typically has a disc radius of from 10 to about 100 mm.
  • the sonotrode may present a more three dimensional appearance to the stain/soil to be cleaned.
  • the sonotrode may be in the shape of a hemisphere or may be disc shaped with undulations or dimples on the surface.
  • the sonotrode can be rectangular, oval, triangular shaped. Because of ergonomic considerations, it is preferred that the sonotrode have rounded edges.
  • the mass of the sonotrode is important to achieve the desired cleaning benefit. It has surprisingly been found that the sonotrode must have a mass between 20 and 500 grams.
  • the sonotrode material must be chosen to have the desired acoustic properties and also be compatible with the chemistry being used in the cleaning application. Suitable materials include titanium, aluminum and steel, preferably hardened steel. Less preferred, but acceptable for cleaners which are substantially free from bleaches and alkalinity is aluminum.
  • the transducer means oscillates at a frequency of from about 100 Hz to about 20,000 kHz, more preferably from about 100 Hz to about 10,000 kHz, more preferably from about 150 Hz to about 2000 kHz, more preferably from about 150 Hz to about 1,000 kHz, more preferably from about 150 Hz to about 100 kHz, more preferably from about 200 Hz to about 50 kHz. It is preferred that the average frequency be from about 1000 Hz to about 100kHz, more preferably from about 10,000 Hz to about 70kHz.
  • the device provides a power output per unit of surface area of said cleaning head of at least about 0.02 watts/cm 2 , more preferably at least about 0.05 watts/cm 2 , even more preferably at least about 0.07 watts/cm 2 , even more preferably still at least about 0.08 watts/cm 2 .
  • the ultrasonic source device can be a vibrational ultrasonic generator, a torsional ultrasonic wave generator, or an axial ultrasonic generator in that it is the shock waves generated by these ultrasonic sources that does the actual cleaning or loosening of the stain on the textile regardless of the mechanism by which the ultrasonic shock waves are generated.
  • the ultrasonic wave generating device can be battery operated or a plug-in type.
  • the present invention may include an optional builder in the product composition.
  • the level of detergent salt/builder can vary widely depending upon the end use of the composition and its desired physical form. When present, the compositions will typically comprise at least about 1% detergent builder and more typically from about 10%) to about 80%), even more typically from about 15%) to about 50%> by weight, of the detergent builder. Lower or higher levels, however, are not meant to be excluded.
  • Inorganic or P-containing detergent builders include, but are not limited to, the alkali metal, ammonium and alkanolammonium salts of polyphosphates (exemplified by the tripolyphosphates, pyrophosphates, and glassy polymeric meta-phosphates), phosphonates, phytic acid, silicates, carbonates (including bicarbonates and sesquicarbonates), sulphates, and aluminosilicates.
  • polyphosphates exemplified by the tripolyphosphates, pyrophosphates, and glassy polymeric meta-phosphates
  • phosphonates phosphonates
  • phytic acid e.g., silicates
  • carbonates including bicarbonates and sesquicarbonates
  • sulphates sulphates
  • aluminosilicates aluminosilicates.
  • non-phosphate salts are required in some locales.
  • compositions herein function surprisingly well even in the presence of the so-called “weak” builders (as compared with phosphates) such as citrate, or in the so-called “underbuilt” situation that may occur with zeolite or layered silicate builders.
  • silicate builders are the alkali metal silicates, particularly those having a SiO2:Na2O ratio in the range 1.6:1 to 3.2:1 and layered silicates, such as the layered sodium silicates described in U.S. Patent 4,664,839, issued May 12, 1987 to H. P. Rieck.
  • NaSKS-6 is the trademark for a crystalline layered silicate marketed by Hoechst (commonly abbreviated herein as "SKS-6").
  • Hoechst commonly abbreviated herein as "SKS-6”
  • the Na SKS-6 silicate builder does not contain aluminum.
  • NaSKS-6 has the delta-Na2SiO5 morphology form of layered silicate.
  • SKS-6 is a highly preferred layered silicate for use herein, but other such layered silicates, such as those having the general formula NaMSixO2x+l.yH2O wherein M is sodium or hydrogen, x is a number from 1.9 to 4, preferably 2, and y is a number from 0 to 20, preferably 0 can be used herein.
  • Various other layered silicates from Hoechst include NaSKS-5, NaSKS-7 and NaSKS-11, as the alpha, beta and gamma forms.
  • delta-Na2SiO5 (NaSKS-6 form) is most preferred for use herein.
  • Other silicates may also be useful such as for example magnesium silicate, which can serve as a crispening agent in granular formulations, as a stabilizing agent for oxygen bleaches, and as a component of suds control systems.
  • carbonate salts as builders are the alkaline earth and alkali metal carbonates as disclosed in German Patent Application No. 2,321,001 published on November 15, 1973.
  • aluminosilicate ion exchange materials are commercially available. These aluminosilicates can be crystalline or amorphous in structure and can be naturally- occurring aluminosilicates or synthetically derived. A method for producing aluminosilicate ion exchange materials is disclosed in U.S. Patent 3,985,669, Krummel, et al, issued October 12, 1976. Preferred synthetic crystalline aluminosilicate ion exchange materials useful herein are available under the designations Zeolite A, Zeolite P (B), Zeolite MAP and Zeolite X. In an especially preferred embodiment, the crystalline aluminosilicate ion exchange material has the formula:
  • This material is known as Zeolite A.
  • the aluminosilicate has a particle size of about 0.1-10 microns in diameter.
  • Organic detergent builders suitable for the purposes of the present invention include, but are not restricted to, a wide variety of polycarboxylate compounds.
  • polycarboxylate refers to compounds having a plurality of carboxylate groups, preferably at least 3 carboxylates.
  • Polycarboxylate builder can generally be added to the composition in acid form, but can also be added in the form of a neutralized salt. When utilized in salt form, alkali metals, such as sodium, potassium, and lithium, or alkanolammonium salts are preferred.
  • polycarboxylate builders include a variety of categories of useful materials.
  • One important category of polycarboxylate builders encompasses the ether polycarboxylates, including oxydisuccinate, as disclosed in Berg, U.S. Patent 3,128,287, issued April 7, 1964, and Lamberti et al, U.S. Patent 3,635,830, issued January 18, 1972. See also "TMS/TDS" builders of U.S. Patent 4,663,071, issued to Bush et al, on May 5, 1987.
  • Suitable ether polycarboxylates also include cyclic compounds, particularly alicyclic compounds, such as those described in U.S. Patents 3,923,679; 3,835,163; 4,158,635; 4,120,874 and 4,102,903.
  • ether hydroxypolycarboxylates copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1, 3, 5-trihydroxy benzene-2, 4, 6-trisulphonic acid, and carboxyrhethyloxysuccinic acid
  • polyacetic acids such as ethylenediamine tetraacetic acid and nitrilotriacetic acid
  • polycarboxylates such as mellitic acid, succinic acid, oxydisuccinic acid, polymaleic acid, benzene 1,3,5- tricarboxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof.
  • Citrate builders e.g., citric acid and soluble salts thereof (particularly sodium salt), are polycarboxylate builders of particular importance. Oxydisuccinates are also especially useful in such compositions and combinations.
  • succinic acid builders include the C5- C20 alkyl and alkenyl succinic acids and salts thereof.
  • a particularly preferred compound of this type is dodecenylsuccinic acid.
  • succinate builders include: laurylsuccinate, myristylsuccinate, palmitylsuccinate, 2- dodecenylsuccinate (preferred), 2-pentadecenylsuccinate, and the like. Laurylsuccinates are the preferred builders of this group, and are described in European Patent Application 86200690.5/0,200,263, published November 5, 1986.
  • Fatty acids e.g., C12-C18 monocarboxylic acids
  • the aforesaid builders especially citrate and/or the succinate builders, to provide additional builder activity.
  • Such use of fatty acids will generally result in a diminution of sudsing, which should be taken into account by the formulator.
  • Surfactants may be included in the compositions of the present invention as ultrasonic cleaning agent.
  • the surfactant may comprise from about 0.01 %>, to about 99.9%o, by weight of the composition depending upon the particular surfactants used and the effects desired.
  • More typical levels comprise from about 0.1 %> to about 80%>, even more preferably from about 0.5%> to about 60%; by weight of the composition.
  • suitable surfactants can be found in McCutcheon's EMULSIFIERS AND DETERGENTS, North American Edition, 1997, McCutcheon Division, MC Publishing Company, in U.S. 3,929,678, Dec. 30, 1975 Laughlin, et al, and U.S. 4,259,217, March 31, 1981, Murphy; in the series “Surfactant Science”, Marcel Dekker, Inc., New York and Basel; in “Handbook of Surfactants”, M.R. Porter, Chapman and Hall, 2nd Ed., 1994; in “Surfactants in Consumer Products", Ed. J. Falbe, Springer-Nerlag, 1987 and “Surface Active Agents and Detergents” (Vol. I and II by Schwartz, Perry and Berch) all of which are incorporated hereinbefore by reference.
  • the detersive surfactant can be nonionic, anionic, ampholytic, zwitterionic, or cationic. Mixtures of these surfactants can also be used.
  • Preferred detergent compositions comprise anionic detersive surfactants or mixtures of anionic surfactants with other surfactants, especially nonionic surfactants and/or amphoteric surfactants.
  • Nonlimiting examples of surfactants useful herein include the conventional Cl l- C18 alkyl benzene sulfonates and primary, secondary and random alkyl sulfates, the C10- C18 alkyl alkoxy sulfates, the C10-C18 alkyl polyglycosides and their corresponding sulfated polyglycosides, C12-C18 alpha- sulfonated fatty acid esters, C12-C18 alkyl and alkyl phenol alkoxylates (especially ethoxylates and mixed ethoxy/propoxy), C12-C18 betaines and sulfobetaines ("sultaines”), C10-C18 amine oxides, C 6 to C 18 branched or linear alkyl sulfates, C 6 to C 18 branched or linear alkyl benzene sulfonates, C 6 to C 18 branched or linear alkyl alkoxy sulfates, and mixture
  • the anionic surfactants useful in the present invention are preferably selected from the group consisting of, linear alkylbenzene sulfonate, alpha olefm sulfonate, paraffin sulfonates, alkyl ester sulfonates, alkyl sulfates, alkyl alkoxy sulfate, alkyl sulfonates, alkyl alkoxy carboxylate, alkyl alkoxylated sulfates, sarcosinates, taurinates, and mixtures thereof, more preferably C 6 to Cj 8 branched or linear alkyl sulfates, C 6 to C ⁇ 8 branched or linear alkyl benzene sulfonates, C 6 to C 18 branched or linear alkyl alkoxy sulfates, and mixtures thereof.
  • An effective amount typically from about 0.5%> to about 90%), preferably about 5% to about 60%, more preferably from about 10 to about 30%, by
  • Alkyl sulfate surfactants are another type of anionic surfactant of importance for use herein.
  • dissolution of alkyl sulfates can be obtained, as well as improved formulability in liquid detergent formulations are water soluble salts or acids of the formula ROSO3M wherein
  • R preferably is a C10-C24 hydrocarbyl, preferably an alkyl or hydroxyalkyl having a C ⁇ 0-C20 alkyl component, more preferably a C ⁇ 2 -C ⁇ g alkyl or hydroxyalkyl, and M is H or a cation, e.g., an alkali (Group IA) metal cation (e.g., sodium, potassium, lithium), substituted or unsubstituted ammonium cations such as methyl-, dimethyl-, and trimethyl ammonium and quaternary ammonium cations, e.g., tetramethyl-ammonium and dimethyl piperdinium, and cations derived from alkanolamines such as ethanolamine, diethanolamine, triethanolamine, and mixtures thereof, and the like.
  • alkali (Group IA) metal cation e.g., sodium, potassium, lithium
  • substituted or unsubstituted ammonium cations such as
  • alkyl chains of Cj2-16 are preferred for lower wash temperatures (e.g., below about 50°C) and Cl6-18 a lkyl chains are preferred for higher wash temperatures (e.g., above about 50°C).
  • Alkyl alkoxylated sulfate surfactants are another category of useful anionic surfactant.
  • surfactants are water soluble salts or acids typically of the formula RO(A) m SO3M wherein R is an unsubstituted C10-C24 alkyl or hydroxyalkyl group having a C10-C24 alkyl component, preferably a C12-C20 alkyl or hydroxyalkyl, more preferably C ⁇ -Cjg alkyl or hydroxyalkyl, A is an ethoxy or propoxy unit, m is greater than zero, typically between about 0.5 and about 6, more preferably between about 0.5 and about 3, and M is H or a cation which can be, for example, a metal cation (e.g., sodium, potassium, lithium, etc.), ammonium or substituted-ammonium cation.
  • R is an unsubstituted C10-C24 alkyl or hydroxyalkyl group having a C10-C24 alkyl component, preferably a C12-C20 alkyl or hydroxyalkyl, more preferably C ⁇ -
  • Alkyl ethoxylated sulfates as well as alkyl propoxylated sulfates are contemplated herein.
  • Specific examples of substituted ammonium cations include methyl-, dimethyl-, trimethyl-ammonium and quaternary ammonium cations, such as tetramethyl- ammonium, dimethyl piperidinium and cations derived from alkanolamines, e.g. monoethanolamine, diethanolamine, and triethanolamine, and mixtures thereof.
  • Suitable anionic surfactants are given in "Surface Active Agents and Detergents" (Vol. I and II by Schwartz, Perry and Berch). A variety of such surfactants are also generally disclosed in U.S. Patent 3,929,678, issued December 30, 1975 to Laughlin, et al. at Column 23, line 58 through Column 29, line 23.
  • Another possible surfactant are the so-called Dianionics. These are surfactants which have at least two anionic groups present on the surfactant molecule.
  • Some suitable dianionic surfactants are further described in copending U.S. Serial No. 60/020,503 (Docket No. 6160P), 60/020,772 (Docket No. 6161P), 60/020,928 (Docket No. 6158P), 60/020,832 (Docket No. 6159P) and 60/020,773 (Docket No. 6162P) all filed on June 28, 1996, and 60/023,539 (Docket No. 6192P), 60/023493 (Docket No.
  • nonionic surfactants include mixed nonionic surfactants. While a wide range of nonionic surfactants may be selected from for purposes of the mixed nonionic surfactant systems useful in the present invention compositions, it is preferred that the nonionic surfactants comprise both a low cloud point surfactant as represented by the ether capped poly(oxyalkylated) alcohol surfactant and high cloud point nonionic surfactant(s) as described as follows.
  • “Cloud point”, as used herein, is a well known property of nonionic surfactants which is the result of the surfactant becoming less soluble with increasing temperature, the temperature at which the appearance of a second phase is observable is referred to as the “cloud point" (See Kirk Othmer, pp. 360-362, hereinbefore).
  • a "low cloud point" nonionic surfactant is defined as a nonionic surfactant system ingredient having a cloud point of less than 30°C, preferably less than about 20°C, and most preferably less than about 10°C and is represented by the ether- capped poly(oxyalkylated) alcohols as described herein.
  • low-cloud point surfactants may be included in conjunction with the ether-capped poly(oxyalkylated) surfactants.
  • optional low-cloud point surfactants include nonionic alkoxylated surfactants, especially ethoxylates derived from primary alcohol, and polyoxypropylene/polyoxyethylene/polyoxypropylene (PO/EO/PO) reverse block polymers.
  • nonionic surfactants include, for example, ethoxylated-propoxylated alcohol (e.g., Olin Corporation's Poly-Tergent® SLF18) and epoxy-capped poly(oxyalkylated) alcohols (e.g., Olin Corporation's Poly- Tergent® SLF18B series of nonionics, as described, for example, in WO 94/22800, published October 13, 1994 by Olin Corporation).
  • These nonionic surfactants can optionally contain propylene oxide in an amount up to about 15% by weight.
  • Other preferred nonionic surfactants can be prepared by the processes described in U.S. Patent 4,223,163, issued September 16, 1980, Builloty, incorporated herein by reference.
  • Optional low cloud point nonionic surfactants additionally comprise a polyoxyethylene, polyoxypropylene block polymeric compound.
  • Block polyoxyethylene- polyoxypropylene polymeric compounds include those based on ethylene glycol, propylene glycol, glycerol, trimethylolpropane and ethylenediamine as initiator reactive hydrogen compound.
  • Certain of the block polymer surfactant compounds designated PLURONIC®, REVERSED PLURONIC®, and TETRONIC® by the BASF-Wyandotte Corp., Wyandotte, Michigan, are suitable in ADD compositions of the invention.
  • Preferred examples include REVERSED PLURONIC® 25R2 and TETRONIC® 702, Such surfactants are typically useful herein as low cloud point nonionic surfactants.
  • a "high cloud point" nonionic surfactant is defined as a nonionic surfactant system ingredient having a cloud point of greater than 40°C, preferably greater than about 50°C, and more preferably greater than about 60°C.
  • the nonionic surfactant system comprises an ethoxylated surfactant derived from the reaction of a monohydroxy alcohol or alkylphenol containing from about 8 to about 20 carbon atoms, with from about 6 to about 15 moles of ethylene oxide per mole of alcohol or alkyl phenol on an average basis.
  • Such high cloud point nonionic surfactants include, for example, Tergitol 15S9 (supplied by Union Carbide), Rhodasurf TMD 8.5 (supplied by Rhone Poulenc), and Neodol 91-8 (supplied by Shell).
  • the high cloud point nonionic surfactant further have a hydrophile-lipophile balance ("HLB"; see Kirk Othmer hereinbefore) value within the range of from about 9 to about 15, preferably 11 to 15.
  • HLB hydrophile-lipophile balance
  • Such materials include, for example, Tergitol 15S9 (supplied by Union Carbide), Rhodasurf TMD 8.5 (supplied by Rhone Poulenc), and Neodol 91-8 (supplied by Shell).
  • high cloud point nonionic surfactant is derived from a straight or preferably branched chain or secondary fatty alcohol containing from about 6 to about 20 carbon atoms (C6-C20 alcohol), including secondary alcohols and branched chain primary alcohols.
  • high cloud point nonionic surfactants are branched or secondary alcohol ethoxylates, more preferably mixed C9/11 or Cl 1/15 branched alcohol ethoxylates, condensed with an average of from about 6 to about 15 moles, preferably from about 6 to about 12 moles, and most preferably from about 6 to about 9 moles of ethylene oxide per mole of alcohol.
  • the ethoxylated nonionic surfactant so derived has a narrow ethoxylate distribution relative to the average.
  • the preferred nonionic surfactant systems useful herein are mixed high cloud point and low cloud point nonionic surfactants combined in a weight ratio preferably within the range of from about 10:1 to about 1 :10.
  • Suitable endcapped alkyl alkoxylate surfactant are the epoxy-capped poly(oxyalkylated) alcohols represented by the formula:
  • x is an integer having an average value of from 0.5 to 1.5, more preferably 1; and y is an integer having a value of at least 15, more preferably at least 20.
  • the surfactant of formula I at least 10 carbon atoms in the terminal epoxide unit [CH2CH(OH)R2].
  • Suitable surfactants of formula I are Olin Corporation's POLY-TERGENT® SLF-18B nonionic surfactants, as described, for example, in WO 94/22800, published October 13, 1994 by Olin Corporation.
  • One preferred ether-capped poly(oxyalkylated) alcohols has the formula:
  • R 1 O[CH 2 CH(R 3 )O] x [CH 2 ]kCH(OH)[CH 2 ]jOR 2
  • R ⁇ and R 2 are linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radicals having from 1 to 30 carbon atoms
  • R 3 is H, or a linear aliphatic hydrocarbon radical having from 1 to 4 carbon atoms
  • x is an integer having an average value from 1 to 30, wherein when x is 2 or greater R 3 may be the same or different and k and j are integers having an average value of from 1 to 12, and more preferably 1 to 5.
  • x is an integer having an average value of from 1 to 20, more preferably from 6 to 15.
  • R-> may be the same or different. That is, R 3 may vary between any of the alklyeneoxy units as described above. For instance, if x is 3, R ⁇ may be selected to form ethlyeneoxy(EO) or propyleneoxy(PO) and may vary in order of (EO)(PO)(EO), (EO)(EO)(PO); (EO)(EO)(EO); (PO)(EO)(PO); (PO)(PO)(EO) and (PO)(PO)(PO).
  • the integer three is chosen for example only and the variation may be much larger with a higher integer value for x and include, for example, multiple (EO) units and a much small number of (PO) units.
  • Particularly preferred surfactants as described above include those that have a low cloud point of less than 20°C. These low cloud point surfactants may then be employed in conjunction with a high cloud point surfactant as described in detail below for superior grease cleaning benefits.
  • ether-capped poly(oxyalkylated) alcohol surfactants are those wherein k is 1 and j is 1 so that the surfactants have the formula:
  • R 1 O[CH 2 CH(R3)O] x CH 2 CH(OH)CH2 ⁇ R 2
  • R* , R 2 and R 3 are defined as above and x is an integer with an average value of from 1 to 30, preferably from 1 to 20, and even more preferably from 6 to 18.
  • Most preferred are surfactants wherein R! and R 2 range from 9 to 14, R 3 is H forming ethyleneoxy and x ranges from 6 to 15.
  • the ether-capped poly(oxyalkylated) alcohol surfactants comprise three general components, namely a linear or branched alcohol, an alkylene oxide and an alkyl ether end cap.
  • the alkyl ether end cap and the alcohol serve as a hydrophobic, oil-soluble portion of the molecule while the alkylene oxide group forms the hydrophilic, water- soluble portion of the molecule.
  • surfactants exhibit significant improvements in spotting and filming characteristics and removal of greasy soils, when used in conjunction with high cloud point surfactants, relative to conventional surfactants.
  • Nonionic surfactants comprises sugar derived surfactants such as the polyhydroxy fatty acid amides of the formula:
  • R is H, C ⁇ -C4 hydrocarbyl, 2-hydroxy ethyl, 2-hydroxy propyl, or a mixture thereof, preferably C1-C4 alkyl, more preferably C ⁇ or C2 alkyl, most preferably C ⁇ alkyl (i.e., methyl); and R 2 is a C5-C31 hydrocarbyl, preferably straight chain C7-C19 alkyl or alkenyl, more preferably straight chain C9-C17 alkyl or alkenyl, most preferably straight chain C1 1 -C15 alkyl or alkenyl, or mixtures thereof; and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative (preferably ethoxylated or propoxylated) thereof.
  • Z preferably will be derived from a reducing sugar in a reductive animation reaction; more preferably Z will be a glycityl.
  • Suitable reducing sugars include glucose, fructose, maltose, lactose, galactose, mannose, and xylose.
  • high dextrose corn syrup, high fructose corn syrup, and high maltose corn syrup can be utilized as well as the individual sugars listed above. These corn syrups may yield a mix of sugar components for Z. It should be understood that it is by no means intended to exclude other suitable raw materials.
  • Z preferably will be selected from the group consisting of -CH 2 -(CHOH) n -CH 2 OH, -CH(CH2 ⁇ H)-(CHOH) n _ ⁇ -
  • n is an integer from 3 to 5, inclusive, and R' is H or a cyclic or aliphatic monosaccharide. Most preferred are glycityls wherein n is 4, particularly -CH 2 -
  • R' can be, for example, N-methyl, N-ethyl, N-propyl, N-isopropyl, N-butyl, N-2- hydroxy ethyl, or N-2-hydroxy propyl.
  • R 2 -CO-N ⁇ can be, for example, cocamide, stearamide, oleamide, lauramide, myristamide, capricamide, palmitamide, tallowamide, etc.
  • Z can be 1 -deoxyglucityl, 2-deoxyfructityl, 1-deoxymaltityl, 1-deoxylactityl, 1- deoxygalactityl, 1-deoxymannityl, 1-deoxymaltotriotityl, etc.
  • polyhydroxy fatty acid amides are known in the art. In general, they can be made by reacting an alkyl amine with a reducing sugar in a reductive amination reaction to form a corresponding N-alkyl polyhydroxyamine, and then reacting the N-alkyl polyhydroxyamine with a fatty aliphatic ester or triglyceride in a condensation/amidation step to form the N-alkyl, N-polyhydroxy fatty acid amide product.
  • Processes for making compositions containing polyhydroxy fatty acid amides are disclosed, for example, in G.B. Patent Specification 809,060, published February 18, 1959, by Thomas Hedley & Co., Ltd., U.S.
  • the preferred alkylpolyglycosides have the formula
  • R2 ⁇ (C n H 2n O) t (glycosyl) x
  • R 2 is selected from the group consisting of alkyl, alkyl-phenyl, hydroxyalkyl, hydroxyalkylphenyl, and mixtures thereof in which the alkyl groups contain from about 10 to about 18, preferably from about 12 to about 14, carbon atoms; n is 2 or 3, preferably 2; t is from 0 to about 10, preferably 0; and x is from about 1.3 to about 10, preferably from about 1.3 to about 3, most preferably from about 1.3 to about 2.7.
  • the glycosyl is preferably derived from glucose.
  • the alcohol or alkylpolyethoxy alcohol is formed first and then reacted with glucose, or a source of glucose, to form the glucoside (attachment at the 1 -position).
  • the additional glycosyl units can then be attached between their 1 -position and the preceding glycosyl units 2-, 3- , 4- and or 6-position, preferably predominantly the 2-position.
  • nonionic surfactants are well known in the art, being described in more detail in Kirk Othmer's Encyclopedia of Chemical Technology, 3rd Ed., Vol. 22, pp. 360-379, "Surfactants and Detersive Systems", incorporated by reference herein. Further suitable nonionic detergent surfactants are generally disclosed in U.S. Patent 3,929,678, Laughlin et al., issued December 30, 1975, at column 13, line 14 through column 16, line 6, incorporated herein by reference. Cationic Surfactants -
  • Cationic surfactants suitable for use in the compositions of the present invention include those having a long-chain hydrocarbyl group.
  • Examples of such cationic co- surfactants include the ammonium co-surfactants such as alkyldimethylammonium halogenides, and those co-surfactants having the formula:
  • R2(OR3) y [R4(OR3) y ] 2 R5N+X-
  • R 2 is an alkyl or alkyl benzyl group having from 8 to 18 carbon atoms in the alkyl chain, each R 3 is selected from the group consisting of -CH 2 CH 2 -,
  • each R 4 is selected from the group consisting of Ci -C4 alkyl, Ci -C4 hydroxyalkyl, benzyl ring structures formed by joining the two R 4 groups, -CH 2 CHOH- CHOHCOR6CHOHCH 2 OH wherein R ⁇ is any hexose or hexose polymer having a molecular weight less than about 1000, and hydrogen when y is not 0; R ⁇ is the same as
  • R4 or is an alkyl chain wherein the total number of carbon atoms of R 2 plus R ⁇ is not more than about 18; each y is from 0 to about 10 and the sum of the y values is from 0 to about 15; and X is any compatible anion.
  • R1 , R 2 , R3, and R4 are independently selected from an aliphatic group of from 1 to about 22 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 22 carbon atoms; and X is a salt- forming anion such as those selected from halogen, (e.g. chloride, bromide), acetate, citrate, lactate, glycolate, phosphate nitrate, sulfate, and alkylsulfate radicals.
  • the aliphatic groups can contain, in addition to carbon and hydrogen atoms, ether linkages, and other groups such as amino groups.
  • the longer chain aliphatic groups e.g., those of about 12 carbons, or higher, can be saturated or unsaturated. Preferred is when R ⁇ , R 2 ,
  • R3, and R4 are independently selected from CI to about C22 alkyl.
  • cationic materials containing two long alkyl chains and two short alkyl chains or those containing one long alkyl chain and three short alkyl chains.
  • the long alkyl chains in the compounds described in the previous sentence have from about 12 to about 22 carbon atoms, preferably from about 16 to about 22 carbon atoms, and the short alkyl chains in the compounds described in the previous sentence have from 1 to about 3 carbon atoms, preferably from 1 to about 2 carbon atoms.
  • Suitable levels of cationic detersive surfactant herein, when present, are from about 0.1% to about 20%, preferably from about 1% to about 15%, although much higher levels, e.g., up to about 30% or more, may be useful especially in nonionic : cationic (i.e., limited or anionic-free) formulations.
  • Amphoteric or zwitterionic detersive surfactants when present are usually useful at levels in the range from about 0.1 % to about 20% by weight of the detergent composition. Often levels will be limited to about 5% or less, especially when the amphoteric is costly.
  • Suitable amphoteric surfactants include the amine oxides corresponding to the formula:
  • R R' R" N ⁇ O wherein R is a primary alkyl group containing 6-24 carbons, preferably 10-18 carbons, and wherein R' and R" are, each, independently, an alkyl group containing 1 to 6 carbon atoms.
  • the arrow in the formula is a conventional representation of a semi-polar bond.
  • R 3 (OR 4 ) x N(R 5 )2 wherein R 3 is an alkyl, hydroxyalkyl, or alkyl phenyl group or mixtures thereof containing from about 8 to about 22 carbon atoms; R 4 is an alkylene or hydroxyalkylene group containing from about 2 to about 3 carbon atoms or mixtures thereof; x is from 0 to about 3; and each R ⁇ is an alkyl or hydroxyalkyl group containing from about 1 to about 3 carbon atoms or a polyethylene oxide group containing from about 1 to about 3 ethylene oxide groups.
  • the R ⁇ groups can be attached to each other, e.g., through an oxygen or nitrogen atom, to form a ring structure.
  • amine oxide surfactants in particular include CI Q-CI g alkyl dimethyl amine oxides and Cg-C ⁇ 2 alkoxy ethyl dihydroxy ethyl amine oxides.
  • the amine oxide is present in the composition in an effective amount, more preferably from about 0.1%) to about 20%), even more preferably about 0.1 %> to about 15%), even more preferably still from about 0.5%> to about 10%,by weight.
  • zwitterionic surfactants which can be used herein comprise the betaine and betaine-like surfactants wherein the molecule contains both basic and acidic groups which form an inner salt giving the molecule both cationic and anionic hydrophilic groups over a broad range of pH values.
  • Some common examples of these s are described in U.S. Pat. Nos. 2,082,275, 2,702,279 and 2,255,082, incorporated herein by reference.
  • One of the preferred zwitterionic compounds have the formula
  • Rl is an alkyl radical containing from 8 to 22 carbon atoms
  • R2 and R3 contain from 1 to 3 carbon atoms
  • R4 is an alkylene chain containing from 1 to 3 carbon atoms
  • X is selected from the group consisting of hydrogen and a hydroxyl radical
  • Y is selected from the group consisting of carboxyl and sulfonyl radicals and wherein the sum of Rl, R2 and R3 radicals is from 14 to 24 carbon atoms.
  • Zwitterionic surfactants contain both a cationic group and an anionic group and are in substantial electrical neutrality where the number of anionic charges and cationic charges on the surfactant molecule are substantially the same.
  • Zwitterionics which typically contain both a quaternary ammonium group and an anionic group selected from sulfonate and carboxylate groups are desirable since they maintain their amphoteric character over most of the pH range of interest for cleaning hard surfaces.
  • the sulfonate group is the preferred anionic group.
  • Antimicrobial agents - an antimicrobial agent is a compound or substance that kills microorganisms or prevents or inhibits their growth and reproduction.
  • a properly selected antimicrobial agent maintains stability under use and storage conditions (pH, temperature, light, etc.), for a required length of time.
  • a desirable property of the antimicrobial agent is that it is safe and nontoxic in handling, formulation and use, is environmentally acceptable and cost effective.
  • Classes of antimicrobial agents include, but are not limited to, chlorophenols, aldehydes, biguanides, antibiotics and biologically active salts.
  • Some preferable antimicrobial agent in the antimicrobial is bronopol, chlorhexidine diacetate, TRICOSAN.TM., hexetidine orparachlorometaxylenol (PCMX). More preferably, the antimicrobial agent is TRICOSAN.TM, chlorhexidine diacetate or hexetidine.
  • the antimicrobial agent when used, is present in a microbiocidally effective amount, more preferably an from about 0.01%> to about 10.0%>, more preferably from about 0.1%) to about 8.0%,even more preferably from about 0.5% to about 2.0%>, by weight of c the composition.
  • Hydrogen peroxide sources are described in detail in the herein incorporated Kirk Othmer's Encyclopedia of Chemical Technology, 4th Ed (1992, John Wiley & Sons), Vol. 4, pp. 271-300 "Bleaching Agents (Survey)", and include the various forms of sodium perborate and sodium percarbonate, including various coated and modified forms.
  • An "effective amount" of a source of hydrogen peroxide is any amount capable of measurably improving stain removal (especially of tea stains) from soiled dishware compared to a hydrogen peroxide source-free composition when the soiled dishware is washed by the consumer in a domestic automatic dishwasher in the presence of alkali.
  • a source of hydrogen peroxide herein is any convenient compound or mixture which under consumer use conditions provides an effective amount of hydrogen peroxide. Levels may vary widely and are usually in the range from about 0.1%) to about 70%, more typically from about 0.5%> to about 30%, by weight of the compositions herein.
  • the preferred source of hydrogen peroxide used herein can be any convenient source, including hydrogen peroxide itself.
  • perborate e.g., sodium perborate (any hydrate but preferably the mono- or tetra-hydrate), sodium carbonate peroxyhydrate or equivalent percarbonate salts, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, or sodium peroxide
  • sources of available oxygen such as persulfate bleach (e.g., OXONE, manufactured by DuPont).
  • Sodium perborate monohydrate and sodium percarbonate are particularly preferred. Mixtures of any convenient hydrogen peroxide sources can also be used.
  • a preferred percarbonate bleach comprises dry particles having an average particle size in the range from about 500 micrometers to about 1,000 micrometers, not more than about 10% by weight of said particles being smaller than about 200 micrometers and not more than about 10%> by weight of said particles being larger than about 1,250 micrometers.
  • the percarbonate can be coated with a silicate, borate or water-soluble surfactants.
  • Percarbonate is available from various commercial sources such as FMC, Solvay and Tokai Denka.
  • compositions of the present invention may also comprise as the bleaching agent a chlorine-type bleaching material.
  • a chlorine-type bleaching material include for example sodium dichloroisocyanurate (“NaDCC").
  • diacyl peroxide a diacyl peroxide
  • Preferred diacyl peroxides include dibenzoyl peroxide.
  • compositions and methods utilize metal-containing bleach catalysts that are effective for use in ADD compositions.
  • metal-containing bleach catalysts are a catalyst system comprising a transition metal cation of defined bleach catalytic activity, such as copper, iron, titanium, ruthenium tungsten, molybdenum, or manganese cations, an auxiliary metal cation having little or no bleach catalytic activity, such as zinc or aluminum cations, and a sequestrate having defined stability constants for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra (methylenephosphonic acid) and water-soluble salts thereof.
  • Such catalysts are disclosed in U.S. Pat. 4,430,243.
  • bleach catalysts include the manganese-based complexes disclosed in U.S. Pat. 5,246,621 and U.S. Pat. 5,244,594. Preferred examples of theses catalysts include Mn IV 2 (u-O)3(l ,4,7-trimethyl-l ,4,7-triazacyclononane) 2 -(PF6)2 ("MnTACN”),
  • bleach catalysts useful in automatic dishwashing compositions and concentrated powder detergent compositions may also be selected as appropriate for the present invention.
  • suitable bleach catalysts see U.S. Pat. 4,246,612 and U.S. Pat. 5,227,084.
  • bleach catalysts are described, for example, in European patent application, publication no. 408,131 (cobalt complex catalysts), European patent applications, publication nos. 384,503, and 306,089 (metallo-po ⁇ hyrin catalysts), U.S. 4,728,455 (manganese/multidentate ligand catalyst), U.S. 4,711,748 and European patent application, publication no. 224,952, (absorbed manganese on aluminosilicate catalyst), U.S. 4,601,845 (aluminosilicate support with manganese and zinc or magnesium salt), U.S. 4,626,373 (manganese/ligand catalyst), U.S. 4,119,557 (ferric complex catalyst), German Pat.
  • cobalt catalyst of this type useful herein are cobalt pentaamine chloride salts having the formula [Co(NH3)5Cl] Yy, and especially [Co(NH3)5Cl]C_2.
  • Preferred T are selected from the group consisting of chloride, iodide, I3 " , formate, nitrate, nitrite, sulfate, sulfite, citrate, acetate, carbonate, bromide, PFg", BF4 " ,
  • T can be protonated if more than one anionic group exists in T, e.g.,
  • T may be selected from the group consisting of non-traditional inorganic anions such as anionic surfactants (e.g., linear alkylbenzene sulfonates (LAS), alkyl sulfates (AS), alkylethoxysulfonates (AES), etc.) and/or anionic polymers (e.g., polyacrylates, polymethacrylates, etc.).
  • anionic surfactants e.g., linear alkylbenzene sulfonates (LAS), alkyl sulfates (AS), alkylethoxysulfonates (AES), etc.
  • anionic polymers e.g., polyacrylates, polymethacrylates, etc.
  • the M moieties include, but are not limited to, for example, F", SO4" 2 , NCS",
  • M can be protonated if more than one anionic group exists in M (e.g., HPO42-, HCO3", H 2 PO4 ⁇ ,
  • Preferred M moieties are substituted and unsubstituted C1 -
  • R is preferably selected from the group consisting of hydrogen and C1 -C30
  • substituents are selected from the group consisting of - NR'3, ⁇ NR'4 + , -C(O)OR', -OR', -C(O)NR'2, wherein R' is selected from the group consisting of hydrogen and Ci -Cg moieties.
  • Such substituted R therefore include the moieties -(CH 2 ) n OH and -(CH 2 ) n NR'4 + , wherein n is an integer from 1 to about 16, preferably from about 2 to about 10, and most preferably from about 2 to about 5.
  • M are carboxylic acids having the formula above wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl, straight or branched C4 ⁇ C ⁇ 2 alkyl, and benzyl. Most preferred R is methyl.
  • Preferred carboxylic acid M moieties include formic, benzoic, octanoic, nonanoic, decanoic, dodecanoic, malonic, maleic, succinic, adipic, phthalic, 2-ethylhexanoic, naphthenoic, oleic, palmitic, triflate, tartrate, stearic, butyric, citric, acrylic, aspartic, fumaric, lauric, linoleic, lactic, malic, and especially acetic acid.
  • the B moieties include carbonate, di- and higher carboxylates (e.g., oxalate, malonate, malic, succinate, maleate), picolinic acid, and alpha and beta amino acids (e.g., glycine, alanine, beta-alanine, phenylalanine).
  • carboxylates e.g., oxalate, malonate, malic, succinate, maleate
  • picolinic acid e.g., glycine, alanine, beta-alanine, phenylalanine.
  • Cobalt bleach catalysts useful herein are known, being described for example along with their base hydrolysis rates, in M. L. Tobe, "Base Hydrolysis of Transition- Metal Complexes", Adv. Inorg. Bioinorg. Mech., (1983), 2, pages 1-94.
  • cobalt catalyst useful herein are cobalt pentaamine acetate salts having the formula [Co(NH3)5OAc] Ty, wherein OAc represents an acetate moiety, and especially cobalt pentaamine acetate chloride, [Co(NH 3 ) 5 OAc]Cl 2 ; as well as [Co(NH 3 ) 5 OAc](OAc) 2 ;
  • Cobalt catalysts according to the present invention made be produced according to the synthetic routes disclosed in U.S. Patent Nos. 5,559,261, 5,581,005, and 5,597,936, the disclosures of which are herein incorporated by reference.
  • catalysts may be coprocessed with adjunct materials so as to reduce the color impact if desired for the aesthetics of the product, or to be included in enzyme- containing particles as exemplified hereinafter, or the compositions may be manufactured to contain catalyst "speckles".
  • the cleaning compositions and cleaning processes herein can be adjusted to provide on the order of at least one part per hundred million of the active bleach catalyst species in the aqueous washing medium, and will preferably provide from about 0.01 ppm to about 25 ppm, more preferably from about 0.05 ppm to about 10 ppm, and most preferably from about 0.1 ppm to about 5 ppm, of the bleach catalyst species in the wash liquor.
  • typical automatic dishwashing compositions herein will comprise from about 0.0005%> to about 0.2%>, more preferably from about 0.004%> to about 0.08%>, of bleach catalyst by weight of the cleaning compositions.
  • Preferred bleach catalysts along with methods of there use can be additionally found in U.S. Patents 5,705,464, 5,804,542, 5,798,326, 5,703,030 and 5,599,781, all of which are inco ⁇ orated herein by reference.
  • bleach activators in the pH range from about 8 to about 9.5 are those selected having an OBS or VL leaving group.
  • Preferred bleach activators are those described in U.S. Patent 5,130,045, Mitchell et al, and 4,412,934, Chung et al, and copending patent applications U. S. Serial Nos. 08/064,624, 08/064,623, 08/064,621, 08/064,562, 08/064,564, 08/082,270 and copending application to M. Burns, A. D. Willey, R. T. Hartshorn, C. K. Ghosh, entitled "Bleaching Compounds Comprising Peroxyacid Activators Used With Enzymes" and having U.S. Serial No. 08/133,691 (P&G Case 4890R), all of which are inco ⁇ orated herein by reference.
  • the mole ratio of peroxygen bleaching compound (as AvO) to bleach activator in the present invention generally ranges from at least 1:1, preferably from about 20:1 to about 1 :1, more preferably from about 10:1 to about 3:1.
  • Quaternary substituted bleach activators may also be included.
  • the present detergent compositions preferably comprise a quaternary substituted bleach activator (QSBA) or a quaternary substituted peracid (QSP); more preferably, the former.
  • QSBA quaternary substituted bleach activator
  • QSP quaternary substituted peracid
  • Levels of bleach activators herein may vary widely, e.g., from about 0.01%> to about 90%), by weight of the composition, although lower levels, e.g., more preferably from about 0.1%) to about 30%, even more preferably from about 0.1% to about 20%>, even more preferably from about 0.5%> to about 10%>, even more still preferably from about 1%) to about 8%, by weight of the composition are more typically used.
  • Preferred hydrophilic bleach activators include N,N,N'N'-tetraacetyl ethylene diamine (TAED) or any of its close relatives including the triacetyl or other unsymmetrical derivatives.
  • TAED and the acetylated carbohydrates such as glucose pentaacetate and tetraacetyl xylose are preferred hydrophilic bleach activators.
  • acetyl triethyl citrate a liquid, also has some utility, as does phenyl benzoate.
  • Preferred hydrophobic bleach activators include substituted amide types described in detail hereinafter, such as activators related to NAPAA, and activators related to certain imidoperacid bleaches, for example as described in U.S. Patent 5,061,807, issued October 29, 1991 and assigned to Hoechst Aktiengesellschaft of Frankfurt, Germany.
  • bleach activators include sodium-4-benzoyloxy benzene sulfonate (SBOBS); sodium- l-methyl-2-benzoyloxy benzene-4-sulphonate; sodium-4-methyl-3- benzoyloxy benzoate (SPCC); trimethyl ammonium toluyloxy-benzene sulfonate; or sodium 3, 5, 5 -trimethyl hexanoyloxybenzene sulfonate (STHOBS).
  • SBOBS sodium-4-benzoyloxy benzene sulfonate
  • SPCC sodium-4-methyl-3- benzoyloxy benzoate
  • STHOBS sodium 3, 5, 5 -trimethyl hexanoyloxybenzene sulfonate
  • R is alkyl, aryl, or alkaryl containing from about 1 to about 14 carbon atoms including both hydrophilic types (short Rl) and hydrophobic types (Rl is especially from 6, preferably about 8, to about 12), R 2 i •s alkylene, arylene or alkaryl ene containing from about 1 to about 14 carbon atoms, R is H, or an alkyl, aryl, or alkaryl containing from about 1 to about 10 carbon atoms, and L is a leaving group which is herein before defined.
  • Preferred bleach activators also include those of the above general formula wherein L is selected from the group consisting of:
  • bleach activators of the above formulae include:
  • Acyl lactam activators are very useful herein, especially the acyl caprolactams (see for example WO 94-28102 A) and acyl valerolactams (see U.S. 5,503,639) of the formulae:
  • R6 is H, alkyl, aryl, alkoxyaryl, an alkaryl group containing from 1 to about 12 carbon atoms, or substituted phenyl containing from about 6 to about 18 carbons.
  • R6 is H, alkyl, aryl, alkoxyaryl, an alkaryl group containing from 1 to about 12 carbon atoms, or substituted phenyl containing from about 6 to about 18 carbons.
  • Nonlimiting examples of additional activators useful herein are to be found in U.S. 4,915,854, U.S. 4,412,934 and 4,634,551.
  • Additional activators useful herein include those of U.S. 5,545,349.
  • Examples include esters of an organic acid and ethylene glycol, di ethylene glycol or glycerin, or the acid imide of an organic acid and ethylenediamine; wherein the organic acid is selected from methoxyacetic acid, 2-methoxypropionic acid, p-methoxybenzoic acid, ethoxyacetic acid, 2-ethoxypropionic acid, p-ethoxybenzoic acid, propoxyacetic acid, 2- propoxypropionic acid, p-propoxybenzoic acid, butoxyacetic acid, 2-butoxypropionic acid, p-butoxybenzoic acid, 2-methoxyethoxyacetic acid,2-methoxy-l- methylethoxyacetic acid, 2-methoxy-2-met__ylethoxyacetic acid, 2-ethoxyethoxyacetic acid, 2-(2-ethoxyethoxy)propionic acid, p-(2-ethoxyethoxy
  • oxygen bleaches are the inorganic peroxides such as Na 2 O 2 , superoxides such as KO 2 , organic hydroperoxides such as cumene hydroperoxide and t- butyl hydroperoxide, and the inorganic peroxoacids and their salts such as the peroxosulfuric acid salts, especially the potassium salts of peroxodisulfuric acid and, more preferably, of peroxomonosulfuric acid including the commercial triple-salt form sold as OXONE by DuPont and also any equivalent commercially available forms such as CUROX from Akzo or CAROAT from Degussa.
  • inorganic peroxides such as Na 2 O 2
  • superoxides such as KO 2
  • organic hydroperoxides such as cumene hydroperoxide and t- butyl hydroperoxide
  • the inorganic peroxoacids and their salts such as the peroxosulfuric acid salts, especially the potassium salt
  • organic peroxides such as dibenzoyl peroxide
  • Mixed oxygen bleach systems are generally useful, as are mixtures of any oxygen bleaches with the known bleach activators, organic catalysts, enzymatic catalysts and mixtures thereof; moreover such mixtures may further include brighteners, photobleaches and dye transfer inhibitors of types well-known in the art.
  • Quaternary substituted bleach activators may also be included.
  • the present detergent compositions preferably comprise a quaternary substituted bleach activator (QSBA) or a quaternary substituted peracid (QSP); more preferably, the former.
  • QSBA quaternary substituted bleach activator
  • QSP quaternary substituted peracid
  • diperoxyacids include, for example, 1,12-diperoxydodecanedioic acid (DPDA); 1,9-diperoxyazelaic acid; diperoxybrassilic acid; diperoxysebasic acid and diperoxyisophthalic acid; 2-decyldiperoxybutane-l,4-dioic acid; and 4,4'- sulphonylbisperoxybenzoic acid.
  • DPDA 1,12-diperoxydodecanedioic acid
  • 1,9-diperoxyazelaic acid diperoxybrassilic acid
  • diperoxysebasic acid and diperoxyisophthalic acid diperoxysebasic acid and diperoxyisophthalic acid
  • 2-decyldiperoxybutane-l,4-dioic acid 2-decyldiperoxybutane-l,4-dioic acid
  • 4,4'- sulphonylbisperoxybenzoic acid Owing
  • reducing bleaches Another class of useful bleaches are the so called reducing bleaches. These are reductants which "reduce”, in the electrochemical sense, instead of oxidize as conventional bleaches do. Examples of suitable reducing bleaches can be found in These are extensively illustrated in Kirk Othmer, Encyclopedia of Chemical Technology, Vol. 17, John Wiley and Sons, 1982. Enzymatic sources of hydrogen peroxide
  • another suitable hydrogen peroxide generating system is a combination of a Ci -C4 alkanol oxidase and a Ci -C4 alkanol, especially a combination of methanol oxidase (MOX) and ethanol.
  • a Ci -C4 alkanol oxidase a Ci -C4 alkanol
  • MOX methanol oxidase
  • Other enzymatic materials related to bleaching such as peroxidases, haloperoxidases, oxidases, superoxide dismutases, catalases and their enhancers or, more commonly, inhibitors, may be used as optional ingredients in the instant compositions.
  • Oxygen bleaches preferably used in conjunction with such oxygen transfer agents or precursors include percarboxylic acids and salts, percarbonic acids and salts, peroxymonosulfuric acid and salts, and mixtures thereof. See also U.S. 5,360,568; U.S. 5,360,569; and U.S. 5,370,826.
  • the invention relates to a detergent composition which inco ⁇ orates a transition-metal bleach catalyst in accordance with the invention, and organic bleach catalyst such as one named hereinabove, a primary oxidant such as a hydrogen peroxide source, a hydrophilic bleach activator, and at least one additional detergent, hard-surface cleaner or automatic dishwashing adjunct.
  • a primary oxidant such as a hydrogen peroxide source
  • a hydrophilic bleach activator such as one named hereinabove
  • additional detergent, hard-surface cleaner or automatic dishwashing adjunct Preferred among such compositions are those which further include a precursor for a hydrophobic oxygen bleach such.
  • compositions of the invention will have a pH range of from about 2 to about 13, preferably, pH is alkaline, more preferably from about 7 to about 12.5, more preferably from about 8 to about 12, even more preferably from about 9 to about 11.5.
  • a composition with a pH greater than 7 it preferably should contain a buffering agent capable of providing a generally more alkaline pH in the composition and in dilute solutions, i.e., about 0.1 % to 0.4% by weight aqueous solution, of the composition.
  • the pKa value of this buffering agent should be about 0.5 to 1.0 pH units below the desired pH value of the composition (determined as described above).
  • the pKa of the buffering agent should be from about 7 to about 10. Under these conditions the buffering agent most effectively controls the pH while using the least amount thereof.
  • the buffering agent may be an active detergent in its own right, or it may be a low molecular weight, organic or inorganic material that is used in this composition solely for maintaining an alkaline pH.
  • Preferred buffering agents for compositions of this invention are nitrogen-containing materials. Some examples are amino acids such as lysine or lower alcohol amines like mono-, di-, and tri-ethanolamine.
  • Tri(hydroxymethyl)amino methane (HOCH2)3CNH3 TriS
  • 2-amino-2-ethyl-l,3-propanediol 2-amino-2-methyl-propanol
  • 2-amino-2-methyl-l,3-propanol disodium glutamate
  • N-methyl diethanolamide 1,3- diamino-propanol N,N'-tetra-methyl- 1 ,3-diamino-2-propanol
  • Mixtures of any of the above are also acceptable.
  • Useful inorganic buffers/alkalinity sources include the alkali metal carbonates and alkali metal phosphates, e.g., sodium carbonate, sodium polyphosphate.
  • alkali metal carbonates and alkali metal phosphates e.g., sodium carbonate, sodium polyphosphate.
  • alkali metal carbonates and alkali metal phosphates e.g., sodium carbonate, sodium polyphosphate.
  • McCutcheon's EMULSFFIERS AND DETERGENTS North American Edition, 1997, McCutcheon Division, MC Publishing Company Kirk and WO 95/07971 both of which are inco ⁇ orated herein by reference.
  • the buffering agent if used, is present in the compositions of the invention herein at a level of from about 0.1 % to 15%>, preferably from about 1%> to 10%>, most preferably from about 2% to 8%>, by weight of the composition.
  • Diamines -It is preferred that the diamines used in the present invention are substantially free from impurities. That is, by “substantially free” it is meant that the diamines are over 95%> pure, i.e., preferably 97%, more preferably 99%, still more preferably 99.5%, free of impurities.
  • impurities which may be present in commercially supplied diamines include 2-Methyl-l,3-diaminobutane and alkylhydropyrimidine. Further, it is believed that the diamines should be free of oxidation reactants to avoid diamine degradation and ammonia formation.
  • compositions of the present invention be "malodor" free. That is, that the odor of the headspace does not generate a negative olfactory response from the consumer.
  • This can be achieved in many ways, including the use of perfumes to mask any undesirable odors, the use of stabilizers, such as antioxidants, chelants etc., and or the use of diamines which are substantially free of impurities. It is believed, without wanting to being limited by theory, that it is the impurities present in the diamines that are the cause of most of the malodors in the compositions of the present invention. These impurities can form during the preparation and storage of the diamines. They can also form during the preparation and storage of the inventive composition.
  • stabilizers such as antioxidants and chelants inhibit and/or prevent the formation of these impurities in the composition from the time of preparation to ultimate use by the consumer and beyond. Hence, it is most preferred to remove, suppress and/or prevent the formation of these malodors by the addition of perfumes, stabilizers and/or the use of diamines which are substantially free from impurities.
  • Preferred organic diamines are those in ' which pKl and pK2 are in the range of about 8.0 to about 11.5, preferably in the range of about 8.4 to about 11, even more preferably from about 8.6 to about 10.75.
  • Other preferred materials are the primary/primary diamines with alkylene spacers ranging from C4 to C8. In general, it is believed that primary diamines are preferred over secondary and tertiary diamines.
  • pKal and pKa2 are quantities of a type collectively known to those skilled in the art as “pKa” pKa is used herein in the same manner as is commonly known to people skilled in the art of chemistry. Values referenced herein can be obtained from literature, such as from “Critical Stability Constants: Volume 2, Amines” by Smith and Martel, Plenum Press, NY and London, 1975. Additional information on pKa's can be obtained from relevant company literature, such as information supplied by Dupont, a supplier of diamines.
  • the pKa of the diamines is specified in an all- aqueous solution at 25°C and for an ionic strength between 0.1 to 0.5 M.
  • the pKa is an equilibrium constant which can change with temperature and ionic strength; thus, values reported in the literature are sometimes not in agreement depending on the measurement method and conditions.
  • the relevant conditions and/or references used for pKa's of this invention are as defined herein or in "Critical Stability Constants: Volume 2, Amines”.
  • the diamines useful herein can be defined by the following structure:
  • R 2 _5 are independently selected from H, methyl, -CH3CH 2 , and ethylene oxides
  • C x and C v are independently selected from methylene groups or branched alkyl groups where x+y is from about 3 to about 6
  • A is optionally present and is selected from electron donating or withdrawing moieties chosen to adjust the diamine pKa's to the desired range. If A is present, then x and y must both be 1 or greater.
  • the preferred diamines can be those with a molecular weight less than or equal to 400 g/mol. It is preferred that these diamines have the formula:
  • each R 6 is independently selected from the group consisting of hydrogen, Ci -C4 linear or branched alkyl, alkyleneoxy having the formula:
  • R ⁇ is C 2 -C4 linear or branched alkylene, and mixtures thereof; R° is hydrogen, Ci -C4 alkyl, and mixtures thereof; m is from 1 to about 10;
  • X is a unit selected from: i) C3-C10 linear alkylene, C3-C10 branched alkylene, C3-C10 cyclic alkylene, C3-C10 branched cyclic alkylene, an alkyleneoxyalkylene having the formula: wherein R ' and m are the same as defined herein above; ii) C3-C10 linear, C3-C10 branched linear, C3-C10 cyclic, C3-C1 Q branched cyclic alkylene, Cg-Cj Q arylene, wherein said unit comprises one or more electron donating or electron withdrawing moieties which provide said diamine with a pK a greater than about 8; and iii) mixtures of (i) and (ii) provided said
  • Examples of preferred diamines include the following:
  • compositions of the present invention may further comprise one or more solvents.
  • solvents may be used in conjunction with an aqueous liquid carrier or they may be used without any aqueous liquid carrier being present.
  • Solvents are broadly defined as compounds that are liquid at temperatures of 20°C-25°C and which are not considered to be surfactants.
  • solvents tend to exist as discrete entities rather than as broad mixtures of compounds.
  • Some solvents which are useful in the hard surface cleaning compositions of the present invention contain from 1 carbon atom to 35 carbon atoms, and contain contiguous linear, branched or cyclic hydrocarbon moieties of no more than 8 carbon atoms.
  • Suitable solvents for the present invention include, methanol, ethanol, propanol, isopropanol, 2-methyl pyrrolidinone, benzyl alcohol and mo ⁇ holine n-oxide. Preferred among these solvents are methanol and isopropanol.
  • compositions used herein may optionally contain an alcohol having a hydrocarbon chain comprising 8 to 18 carbon atoms, preferably 12 to 16.
  • the hydrocarbon chain can be branched or linear, and can be mono, di or polyalcohols.
  • the compositions used herein can optionally comprise from 0.1 %> to 3%> by weight of the total composition of such alcohol, or mixtures thereof, preferably from 0.1%) to 1%>.
  • solvents which can be used herein include all those known to the those skilled in the art of hard-surfaces cleaner compositions. Suitable solvents for use herein include ethers and di ethers having from 4 to 14 carbon atoms, preferably from 6 to 12 carbon atoms, and more preferably from 8 to 10 carbon atoms.
  • Suitable solvents are glycols or alkoxylated glycols, alkoxylated aromatic alcohols, aromatic alcohols, aliphatic branched alcohols, alkoxylated aliphatic branched alcohols, alkoxylated linear C1-C5 alcohols, linear C1-C5 alcohols, C8-C14 alkyl and cycloalkyl hydrocarbons and halohydrocarbons, C6-C16 glycol ethers and mixtures thereof.
  • Suitable glycols which can be used herein are according to the formula HO- CR1R2-OH wherein Rl and R2 are independently H or a C2-C10 saturated or unsaturated aliphatic hydrocarbon chain and/or cyclic. Suitable glycols to be used herein are dodecaneglycol and/or propanediol.
  • Suitable alkoxylated glycols which can be used herein are according to the formula R-(A)n-Rl-OH wherein R is H, OH, a linear saturated or unsaturated alkyl of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 2 to 10, wherein Rl is H or a linear saturated or unsaturated alkyl of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 2 to 10, and A is an alkoxy group preferably ethoxy, methoxy, and/or propoxy and n is from 1 to 5, preferably 1 to 2.
  • Suitable alkoxylated glycols to be used herein are methoxy octadecanol and/or ethoxyethoxyethanol .
  • Suitable alkoxylated aromatic alcohols which can be used herein are according to the formula R (A) n -OH wherein R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 2 to 10, wherein A is an alkoxy group preferably butoxy, propoxy and or ethoxy, and n is an integer of from 1 to 5, preferably 1 to 2.
  • Suitable alkoxylated aromatic alcohols are benzoxyethanol and/or benzoxypropanol.
  • Suitable aromatic alcohols which can be used herein are according to the formula R-OH wherein R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, preferably from 1 to 15 and more preferably from 1 to 10.
  • R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, preferably from 1 to 15 and more preferably from 1 to 10.
  • a suitable aromatic alcohol to be used herein is benzyl alcohol.
  • Suitable aliphatic branched alcohols which can be used herein are according to the formula R-OH wherein R is a branched saturated or unsaturated alkyl group of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 5 to 12.
  • Particularly suitable aliphatic branched alcohols to be used herein include 2-ethylbutanol and/or 2-methylbutanol.
  • Suitable alkoxylated linear C1-C5 alcohols which can be used herein are according to the formula R (A) n -OH wherein R is a linear saturated or unsaturated alkyl group of from 1 to 5 carbon atoms, preferably from 2 to 4, wherein A is an alkoxy group preferably butoxy, propoxy and/or ethoxy, and n is an integer of from 1 to 5, preferably 1 to 2.
  • Suitable alkoxylated aliphatic linear C1-C5 alcohols are butoxy propoxy propanol (n-BPP), butoxyethanol, butoxypropanol, ethoxyethanol or mixtures thereof. Butoxy propoxy propanol is commercially available under the trade name n-BPP® from Dow chemical.
  • Suitable linear C1-C5 alcohols which can be used herein are according to the formula R-OH wherein R is a linear saturated or unsaturated alkyl group of from 1 to 5 carbon atoms, preferably from 2 to 4.
  • Suitable linear C1-C5 alcohols are methanol, ethanol, propanol or mixtures thereof.
  • Suitable solvents include, but are not limited to, butyl diglycol ether (BDGE), butyltriglycol ether, ter amilic alcohol and the like. Particularly preferred solvents which can be used herein are butoxy propoxy propanol, butyl diglycol ether, benzyl alcohol, butoxypropanol, ethanol, methanol, isopropanol and mixtures thereof.
  • BDGE butyl diglycol ether
  • benzyl alcohol butoxypropanol
  • ethanol ethanol
  • methanol isopropanol and mixtures thereof.
  • compositions used in the methods of the present invention preferably comprise up to 20%> by weight of the total composition of a solvent or mixtures thereof, more preferably from 0.5%o to 10%>, even more preferably from 3%> to 10%. and even more preferably still from 1% to 8%>, by weight.
  • Suitable solvents for use herein include propylene glycol derivatives such as n-butoxypropanol or n- butoxypropoxypropanol, water-soluble CARBITOL R solvents or water-soluble CELLOSOLVE R solvents; water-soluble CARBITOL R solvents are compounds of the 2-(2-alkoxyethoxy)ethanol class wherein the alkoxy group is derived from ethyl, propyl or butyl; a preferred water-soluble carbitol is 2-(2- butoxyethoxy)ethanol also known as butyl carbitol.
  • Water-soluble CELLOSOLVE R solvents are compounds of the 2-alkoxyethoxy ethanol class, with 2-butoxyethoxyethanol being preferred.
  • solvents include benzyl alcohol, and diols such as 2- ethyl-1, 3-hexanediol and 2,2,4-trimethyl-l,3-pentanediol and mixtures thereof.
  • Some preferred solvents for use herein are n-butoxypropoxypropanol, BUTYL CARBITOL ® and mixtures thereof.
  • the solvents can also be selected from the group of compounds comprising ether derivatives of mono-, di- and tri-ethylene glycol, propylene glycol, butylene glycol ethers, and mixtures thereof.
  • the molecular weights of these solvents are preferably less than 350, more preferably between 100 and 300, even more preferably between 115 and 250.
  • preferred solvents include, for example, mono-ethylene glycol n-hexyl ether, mono-propylene glycol n-butyl ether, and tri-propylene glycol methyl ether.
  • Ethylene glycol and propylene glycol ethers are commercially available from the Dow Chemical Company under the tradename "Dowanol” and from the Arco Chemical Company under the tradename "Arcosolv”.
  • Other preferred solvents including mono- and di-ethylene glycol «-hexyl ether are available from the Union Carbide company. Hydrophobic Solvent
  • hydrophobic solvent that has cleaning activity.
  • the hydrophobic solvents which may be employed in the hard surface cleaning compositions herein can be any of the well-known "degreasing" solvents commonly used in, for example, the dry cleaning industry, in the hard surface cleaner industry and the metalworking industry.
  • ⁇ H is the hydrogen bonding parameter
  • a is the aggregation number
  • ⁇ T is the solubility parameter which is obtained from the formula:
  • ⁇ H 2 5 is the heat of vaporization at 25°C
  • R is the gas constant (1.987 cal/mole/deg)
  • T is the absolute temperature in °K
  • Tt ⁇ is the boiling point in °K
  • T c is the critical temperature in °K
  • d is the density in g/ml
  • M is the molecular weight.
  • hydrogen bonding parameters are preferably less than 7.7, more preferably from 2 to 7, or 7.7, and even more preferably from 3 to 6. Solvents with lower numbers become increasingly difficult to solubilize in the compositions and have a greater tendency to cause a haze on glass. Higher numbers require more solvent to provide good greasy/oily soil cleaning.
  • Hydrophobic solvents are typically used, when present, at a level of from 0.5%> to 30%), preferably from 2%> to 15%>, more preferably from 3%> to 8%.
  • Dilute compositions typically have solvents at a level of from 1% to 10%), preferably from 3% to 6%>.
  • Concentrated compositions contain from 10% to 30%>, preferably from 10% to 20% of solvent.
  • solvents comprise hydrocarbon or halogenated hydrocarbon moieties of the alkyl or cycloalkyl type, and have a boiling point well above room temperature, i.e., above 20°C.
  • One highly preferred solvent is limonene, which not only has good grease removal but also a pleasant odor properties.
  • compositions of the present type will be guided in the selection of solvent partly by the need to provide good grease-cutting properties, and partly by aesthetic considerations.
  • kerosene hydrocarbons function quite well for grease cutting in the present compositions, but can be malodorous. Kerosene must be exceptionally clean before it can be used, even in commercial situations. For home use, where malodors would not be tolerated, the formulator would be more likely to select solvents which have a relatively pleasant odor, or odors which can be reasonably modified by perfuming.
  • the C5-C9 alkyl aromatic solvents especially the C5-C9 alkyl benzenes, preferably octyl benzene, exhibit excellent grease removal properties and have a low, pleasant odor.
  • glycol ethers useful herein have the formula RU O-(Rl2 ⁇ -) m lH wherein each RU is an alkyl group which contains from 3 to 8 carbon atoms, each Rl2 is either ethylene or propylene, and m' is a number from 1 to 3.
  • glycol ethers are selected from the group consisting of monopropyleneglycolmonopropyl ether, dipropyleneglycolmonobutyl ether, monopropyleneglycolmonobutyl ether, ethyleneglycolmonohexyl ether, ethyleneglycolmonobutyl ether, diethyleneglycolmonohexyl ether, monoethyleneglycolmonohexyl ether, monoethyleneglycolmonobutyl ether, and mixtures thereof.
  • a particularly preferred type of solvent for these hard surface cleaner compositions comprises diols having from 6 to 16 carbon atoms in their molecular structure.
  • Preferred diol solvents have a solubility in water of from 0.1 to 20 g/100 g of water at 20°C.
  • the diol solvents in addition to good grease cutting ability, impart to the compositions an enhanced ability to remove calcium soap soils from surfaces such as bathtub and shower stall walls. These soils are particularly difficult to remove, especially for compositions which do not contain an abrasive.
  • Other solvents such as benzyl alcohol, n-hexanol, and phthalic acid esters of C 1.4 alcohols can also be used.
  • Solvents such as pine oil, orange te ⁇ ene, benzyl alcohol, n-hexanol, phthalic acid esters of C ⁇ _4 alcohols, butoxy propanol, Butyl Carbitol® and l(2-n-butoxy-l- methylethoxy)propane-2-ol (also called butoxy propoxy propanol or dipropylene glycol monobutyl ether), hexyl diglycol (Hexyl Carbitol®), butyl triglycol, diols such as 2,2,4- trimethyl- 1,3-pentanediol, and mixtures thereof, can be used.
  • the butoxy-propanol solvent should have no more than 20%>, preferably no more than 10%, more preferably no more than 7%, of the secondary isomer in which the butoxy group is attached to the secondary atom of the propanol for improved odor.
  • the level of hydrophobic solvent is preferably, when present, from 1%> to 15%, more preferably from 2%> to 12%o, even more preferably from 5% to 10%>.
  • compositions used in the methods of the present invention may optionally comprise one or more materials which are hydrotropes.
  • Hydrotropes suitable for use in the compositions herein include the C1 -C3 alkyl aryl sulfonates, Cg-C ⁇ 2 alkanols, C ⁇
  • composition of the present invention preferably comprises from 0.5%> to 8%, by weight of the liquid detergent composition of a hydrotrope selected from alkali metal and calcium xylene and toluene sulfonates.
  • Suitable C1-C3 alkyl aryl sulfonates include sodium, potassium, calcium and ammonium xylene sulfonates; sodium, potassium, calcium and ammonium toluene sulfonates; sodium, potassium, calcium and ammonium cumene sulfonates; and sodium, potassium, calcium and ammonium substituted or unsubstituted naphthalene sulfonates and mixtures thereof.
  • Suitable Cj-Cg carboxylic sulfate or sulfonate salts are any water soluble salts or organic compounds comprising 1 to 8 carbon atoms (exclusive of substituent groups), which are substituted with sulfate or sulfonate and have at least one carboxylic group.
  • the substituted organic compound may be cyclic, acylic or aromatic, i.e. benzene derivatives.
  • Preferred alkyl compounds have from 1 to 4 carbon atoms substituted with sulfate or sulfonate and have from 1 to 2 carboxylic groups.
  • hydrotrope examples include sulfosuccinate salts, sulfophthalic salts, sulfoacetic salts, m- sulfobenzoic acid salts and diester sulfosuccinates, preferably the sodium or potassium salts as disclosed in U.S. 3,915,903.
  • Suitable C1-C4 hydrocarboxylates and C1-C4 carboxylates for use herein include acetates and propionates and citrates.
  • Suitable C 2 -C4 diacids for use herein include succinic, glutaric and adipic acids.
  • hydrotrope compounds which deliver hydrotropic effects suitable for use herein as a hydrotrope include Cg-C ⁇ 2 alkanols and urea.
  • Preferred hydrotropes for use herein are sodium, potassium, calcium and ammonium cumene sulfonate; sodium, potassium, calcium and ammonium xylene sulfonate; sodium, potassium, calcium and ammonium toluene sulfonate and mixtures thereof. Most preferred are sodium cumene sulfonate and calcium xylene sulfonate and mixtures thereof. These preferred hydrotrope materials can be present in the composition to the extent of from 0.5% to 8% by weight. Polymeric Suds Stabilizers
  • compositions of the present invention may also contain a polymeric suds stabilizer.
  • the compositions preferably comprise at least an effective amount of the polymeric suds stabilizers described herein, more preferably from about 0.01%> to about 10%), even more preferably from about 0.05%> to about 5%>, even more preferably still preferably from about 0.1 %> to about 2%> by weight, of said composition.
  • an effective amount polymeric suds stabilizers is that the suds volume and suds duration produced by the presently described compositions are sustained for an increased amount of time relative to a composition which does not comprise one or more of the polymeric suds stabilizer described herein.
  • the polymeric suds stabilizer can be present as the free base or as a salt.
  • Typical counter ions include, citrate, maleate, sulfate, chloride, etc.
  • One preferred polymeric suds stabilizer are polymers comprising at least one monomeric unit of the formula:
  • each of R 1 , R 2 and R 3 are independently selected from the group consisting of hydrogen, Ci to C 6 alkyl, and mixtures thereof, preferably hydrogen, d to C 3 alkyl, more preferably, hydrogen or methyl.
  • L is selected from the group consisting of a bond, O, NR 6 , SR 7 R 8 and mixtures thereof, preferably, O, NR 6 , wherein R 6 is selected from the group consisting of hydrogen, C ⁇ to C 8 alkyl and mixtures thereof, preferably, hydrogen, Ci to C 3 , and mixtures thereof, more preferably hydrogen, methyl; each of R and R are independently hydrogen, O, Cj to C 8 alkyl and mixtures thereof, preferably, hydrogen, Ci to C 3 , and mixtures thereof, more preferably hydrogen or methyl.
  • an oxygen linked via a double bond is meant, such as a carbonyl group.
  • SR 7 R 8 can have the following structures:
  • SR R form a heterocyclic ring containing from 4 to 7 carbon atoms, optionally containing additional hetero atoms and optionally substituted.
  • SR 7 R 8 can be:
  • SR 7 R 8 when present, is not a heterocycle.
  • L is a bond it means that there is a direct link, or a bond, between the carbonyl carbon atom to Z, when z is not zero.
  • L is a bond and z is zero, it means L is a bond from the carbonyl atom to A.
  • Z is selected from the group consisting of: -(CH )-, (CH ⁇ CH ⁇ CH)-, -(CH 2 - CHOH)-, (CH 2 -CHNR 6 )-, -(CH 2 -CHR 14 -O)- and mixtures thereof, preferably -(CH 2 )-.
  • R 14 is selected from the group consisting of hydrogen, d to C 6 alkyl and mixtures thereof, preferably hydrogen, methyl, ethyl and mixtures thereof;
  • z is an integer selected from about 0 to about 12, preferably about 2 to about 10, more preferably about 2 to about 6.
  • A is NR 4 R 5 .
  • each of R 4 and R 5 are is independently selected from the group consisting of hydrogen, Cj-Cg linear or branched alkyl, alkyleneoxy having the formula: wherein R ⁇ O is C 2 -C4 linear or branched alkylene, and mixtures thereof; RU is hydrogen, Ci -C4 alkyl, and mixtures thereof; y is from 1 to about 10.
  • R 4 and R 5 are independently, hydrogen, d to C 4 alkyl.
  • NR 4 R 5 can form a heterocyclic ring containing from 4 to 7 carbon atoms, optionally containing additional hetero atoms, optionally fused to a benzene ring, and optionally substituted by C] to C 8 hydrocarbyl.
  • heterocycles both substituted and unsubstituted are indolyl, isoindolinyl imidazolyl, imidazolinyl, piperidinyl pyrazolyl, pyrazolinyl, pyridinyl, piperazinyl, pyrrolidinyl, pyrrolidinyl, guanidino, amidino, quinidinyl, thiazolinyl, mo ⁇ holine and mixtures thereof, with mo ⁇ holino and piperazinyl being preferred.
  • the polymeric suds stabilizer has a molecular weight of from about 1,000 to about 2,000,000 preferably from about 5,000 to about 1,000,000, more preferably from about 10,000 to about 750,000, more preferably from about 20,000 to about 500,000, even more preferably from about 35,000 to about 300,000 daltons.
  • the molecular weight of the polymeric suds boosters can be determined via conventional gel permeation chromatography.
  • the polymeric suds stabilizers be selected from homopolymer, copolymers and te ⁇ olymers, other polymers (or multimers) of the at least one monomeric unit
  • the polymeric suds stabilizers can also be envisioned via polymerization of the at least one monomeric unit with a wider selection of monomers. That is, all the polymeric suds stabilizers can be a homopolymers, copolymers, te ⁇ olymers, etc. of the at least one monomeric unit, or the polymeric suds stabilizer can be copolymers, te ⁇ olymers, etc. containing one, two or more of the at least one monomeric unit and one, two or more monomeric units other than the at least one monomeric unit. In the copolymer, te ⁇ olymer, etc., the distribution of the monomers can be either random or repeating.
  • Some preferred suds stabilizing polymers are homopolymers, copolymers or te ⁇ olymers which comprise at least one monomeric units, selected from:
  • DMAM 2-dimethylaminoethyl methacrylate
  • Some preferred copolymers include: copolymers of
  • ratio of (DMA) to (DMAM) is about 1 to about 10, preferably about 1 to about 5, more preferably about 1 to about 3.
  • DMAM DMAM
  • DMA DMMA
  • Another prefered suds stabilizing polymer are the proteinaceous suds stabilizers. These can be peptides, polypeptides, amino acid containing copolymers, and mixtures thereof. Any suitable amino acid can be used to form the backbone of the peptides, polypeptides, or amino acid containing copolymers of the present invention provided at least 10%) to about 40%> of said amino acids which comprise the peptides are capable of being protonated at a pH of from 7 to about 11.5.
  • amino acids suitable for use in forming the proteinaceous suds stabilizers of the present invention have from 2 to 22 carbon atoms, said amino acids having the formula:
  • R and R ⁇ are each independently hydrogen, Ci -Cg linear or branched alkyl, Ci - Cg substituted alkyl, and mixtures thereof.
  • the indices x and y are each independently from 0 to 2.
  • amino acid lysine having the formula:
  • R is a substituted C ⁇ alkyl moiety, said substituent is 4-imidazolyl.
  • polyamino acid compounds may be naturally occurring peptides, polypeptides, enzymes, and the like, provided said compounds have an isoelectric point of from about 7 to about 11.5 and a molecular weight greater than or equal to about 1500 daltons.
  • An example of a polyamino acid which is suitable as a proteinaceous suds stabilizer according to the present invention is the enzyme lysozyme.
  • Another preferred polymeric suds stabilizers are homopolymers or copolymers wherein the monomers which comprise said homopolymers or copolymers contain a moiety capable of being protonated at a pH of from about 4 to about 12, or a moiety capable of being de-protonated at a pH of from about 4 to about 12, of a mixture of both types of moieties.
  • a preferred class of zwitterionic polymer suitable for use as a suds volume and suds duration enhancer has the formula:
  • R is C ⁇ -C ⁇ 2 linear alkylene, C ⁇ -C ⁇ 2 branched alkylene, and mixtures thereof; preferably C1-C4 linear alkylene, C3-C4 branched alkylene; more preferably methylene and 1 ,2-propylene.
  • R 1 and R 2 are defined herein after.
  • the index x is from 0 to 6; y is 0 or 1 ; z is 0 or 1.
  • the index n has the value such that the zwitterionic polymers of the present invention have an average molecular weight of from about 1,000 to about 2,000,000 preferably from about 5,000 to about 1,000,000, more preferably from about 10,000 to about 750,000, more preferably from about 20,000 to about 500,000, even more preferably from about 35,000 to about 300,000 daltons.
  • the molecular weight of the polymeric suds boosters can be determined via conventional gel permeation chromatography.
  • Anionic Units - R* is a unit capable of having a negative charge at a pH of from about 4 to about 12.
  • Preferred Rl has the formula:
  • L is a linking unit independently selected from the following:
  • R' is independently hydrogen, C1 -C4 alkyl, and mixtures thereof; preferably hydrogen or alternatively R' and S can form a heterocycle of 4 to 7 carbon atoms, optionally containing other hetero atoms and optionally substituted.
  • the linking group L can be introduced into the molecule as part of the original monomer backbone, for example, a polymer having L units of the formula:
  • each S unit is independently selected from C ⁇ -Cj 2 linear alkylene, C ⁇ -C ⁇ 2 branched alkylene, C3-C ⁇ 2 linear alkenylene, C3 ⁇ C ⁇ 2 branched alkenylene, C3-C1;?
  • R 5 is C2-C4 linear alkylene, C3-C4 branched alkylene, and mixtures thereof, preferably ethylene, 1,2- propylene, and mixtures thereof, more preferably ethylene
  • R ⁇ is C 2 -C ⁇ 2 linear alkylene, and mixtures thereof, preferably ethylene
  • R 7 is hydrogen, C1 -C4 alkyl, and mixtures thereof, preferably hydrogen.
  • the index k is from 1 to about 20.
  • R is independently selected from hydrogen, -CO 2 M, -SO3M, -OSO3M, - CH 2 P(O)(OM) 2 , -OP(O)(OM) , units having the formula:
  • each R&, R9, and RlO i s independently selected from the group consisting of hydrogen, -(CH2) m R ⁇ , and mixtures thereof, wherein RU is -CO 2 H, -SO3M, - OSO3M, -CH(CO 2 H)CH 2 CO 2 H, -CH 2 P(O)(OH) 2 , -OP(O)(OH) 2 , and mixtures thereof, preferably -CO H, -CH(CO 2 H)CH 2 CO 2 H, and mixtures thereof, more preferably -
  • R ⁇ , R ⁇ , or RlO is not a hydrogen atom, preferably two R ⁇ , R ⁇ , or RIO units are hydrogen.
  • M is hydrogen or a salt forming cation, preferably hydrogen.
  • the index m has the value from 0 to 10.
  • Cationic Units - R2 is a unit capable of having a positive charge at a pH of from about 4 to about 12.
  • Preferred R2 has the formula:
  • L is a linking unit independently selected from the following:
  • S is a "spacing unit" wherein each S unit is independently selected from C1-C12 linear alkylene, C1-C12 branched alkylene, C3-C12 linear alkenylene, C3-C12 branched alkenylene, C3-C12 hydroxyalkylene, C4-C12 dihydroxyalkylene, Cg-Ci Q arylene, C -Ci2 dialkylarylene, -(R 5 O) k R5-, - (R 5 O) k R 6 (OR 5 ) k -, -CH 2 CH(OR 7 )CH -, and mixtures thereof; wherein R 5 is C 2 -C linear alkylene, C3-C4 branched alkylene, and mixtures thereof, preferably ethylene, 1,2- propylene, and mixtures thereof, more preferably ethylene; R ⁇ is C2-C12 linear alkylene, and mixtures thereof, preferably ethylene; R 7 is hydrogen, C1 -C4 alkylene, and
  • the index k is from 1 to about 20.
  • R4 is independently selected from amino, alkylamino carboxamide, 3-imidazolyl, 4-imidazolyl, 2-imidazolinyl, 4-imidazolinyl, 2-piperidinyl, 3-piperidinyl, 4-piperidinyl, 1-pyrazolyl, 3-pyrazoyl, 4-pyrazoyl, 5-pyrazoyl, 1-pyrazolinyl, 3-pyrazolinyl, 4- pyrazolinyl, 5-pyrazolinyl, 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, piperazinyl, 2- pyrrolidinyl, 3 -pyrrolidinyl, guanidino, amidmo, and mixtures thereof, preferably dialkylamino having the formula:
  • each RU is independently hydrogen, C1-C4 alkyl, and mixtures thereof, preferably hydrogen or methyl or alternatively the two Rl 1 can form a heterocycle of 4 to 8 carbon atoms, optionally containing other hetero atoms and optionally substituted.
  • zwitterionic polymers are polymers comprising monomers wherein each monomer has only cationic units or anionic units, said polymers have the formula:
  • n + n2 n such that n has a value wherein the resulting zwitterionic polymer has a molecular weight of form about 5,000 to about 1,000,000 daltons.
  • An example of a polymer having monomers with only an anionic unit or a cationic unit has the formula: wherein the sum of nl and n2 provide a polymer with an average molecular weight of from about 5,000 to about 750,000 daltons.
  • Another preferred zwitterionic polymer according to the present invention are polymers which have limited crosslinking, said polymers having the formula:
  • each Rl3 is independently Ll or ethylene.
  • the zwitterionic polymers of the present invention may comprise any combination of monomer units, for example, several different monomers having various
  • cationic unit is defined as "a moiety which when inco ⁇ orated into the structure of the suds stabilizers of the present invention, is capable of maintaining a cationic charge within the pH range of from about 4 to about 12.
  • the cationic unit is not required to be protonated at every pH value within the range of about 4 to about 12."
  • Non- limiting examples of units which comprise a cationic moiety include lysine, ornithine, the monomeric unit having the formula:
  • anionic unit is defined as "a moiety which when inco ⁇ orated into the structure of the suds stabilizers of the present invention, is capable of maintaining an anionic charge within the pH range of from about 4 to about 12.
  • the anionic unit is not required to be de-protonated at every pH value within the range of about 4 to about 12."
  • Non- limiting examples of units which comprise a anionic moiety include, acrylic acid, methacrylic acid, glutamic acid, aspartic acid, the monomeric unit having the formula:
  • This latter unit is defined herein as "a unit capable of having an anionic and a cationic charge at a pH of from about 4 to about 12.”
  • non-charged unit is defined as "a moiety which when inco ⁇ orated into the structure of the suds stabilizers of the present invention, has no charge within the pH range of from about 4 to about 12."
  • Non- limiting examples of units which are “non-charged units” are styrene, ethylene, propylene, butylene, 1,2-phenylene, esters, amides, ketones, ethers, and the like.
  • the units which comprise the polymers of the present invention may, as single units or monomers, have any pK a value.
  • the formulator may combine any suitable monomers or units to form a polymeric suds stabilizer, for example, amino acids may be combined with polyacrylate units.
  • a preferred combination is a detergent composition having a cocktail of conventional applicable enzymes like protease, amylase, lipase, cutinase and/or cellulase. Enzymes when present in the compositions, at from about 0.0001%) to about 5% of active enzyme by weight of the detergent composition.
  • proteolytic Enzyme can be of animal, vegetable or microorganism (preferred) origin.
  • the proteases for use in the detergent compositions herein include (but are not limited to) trypsin, subtilisin, chymotrypsin and elastase-type proteases.
  • Preferred for use herein are subtilisin-type proteolytic enzymes.
  • Particularly preferred is bacterial serine proteolytic enzyme obtained from Bacillus subtilis and/or Bacillus licheniformis.
  • Suitable proteolytic enzymes include Novo Industri A/S Alcalase® (preferred),
  • Esperase®' Savinase® (Copenhagen, Denmark)
  • Gist-brocades' Maxatase® Maxacal® and Maxapem 15® (protein engineered Maxacal®) (Delft, Netherlands)
  • subtilisin BPN and BPN'(preferred) which are commercially available.
  • Preferred proteolytic enzymes are also modified bacterial serine proteases, such as those made by Genencor International, Inc. (San Francisco, California) which are described in European Patent 251,446B, granted December 28, 1994 (particularly pages 17, 24 and 98) and which are also called herein "Protease B".
  • Protease A a modified bacterial serine proteolytic enzyme
  • BPN' modified bacterial serine proteolytic enzyme
  • Preferred proteolytic enzymes are selected from the group consisting of Alcalase ® (Novo Industri A/S), BPN', Protease A and Protease B (Genencor), and mixtures thereof. Protease B is most preferred.
  • proteases described in our co-pending application USSN 08/136,797 can be included in the detergent composition of the invention.
  • protease D is a carbonyl hydrolase variant having an amino acid sequence not found in nature, which is derived from a precursor carbonyl hydrolase by substituting a different amino acid for a plurality of amino acid residues at a position in said carbonyl hydrolase equivalent to position +76, preferably also in combination with one or more amino acid residue positions equivalent to those selected from the group consisting of +99, +101, +103, +104, +107, +123, +27, +105, +109, +126, +128, +135, +156, +166, +195, +197, +204, +206, +210, +216, +217, +218, +222, +260, +265, and/or +274 according to the numbering of Bacillus amyloliquefaciens subtilisin, as described in WO 95/10615 published April 20, 1995 by Genencor International (A. Baeck et al. entitled "Protease-Containing Cleaning Composition
  • proteases are also described in PCT publications: WO 95/30010 published November 9, 1995 by The Procter & Gamble Company; WO 95/30011 published November 9, 1995 by The Procter & Gamble Company; WO 95/29979 published November 9, 1995 by The Procter & Gamble Company.
  • Protease enzyme may be inco ⁇ orated into the compositions in accordance with the invention at a level of from 0.0001%> to 2% active enzyme by weight of the composition.
  • Amylase - Amylases ( ⁇ and/or ⁇ ) can be included for removal of carbohydrate-based stains. Suitable amylases are Termamyl® (Novo Nordisk),
  • the enzymes may be of any suitable origin, such as vegetable, animal, bacterial, fungal and yeast origin.
  • Amylase enzymes are normally inco ⁇ orated in the detergent composition at levels from 0.0001% to 2%, preferably from about 0.0001%) to about 0.5%, more preferably from about 0.0005% to about O.P/o, even more preferably from about 0.001%> to about 0.05%> of active enzyme by weight of the detergent composition.
  • Amylase enzymes also include those described in WO95/26397 and in co- pending application by Novo Nordisk PCT/DK96/00056.
  • Other specific amylase enzymes for use in the detergent compositions of the present invention therefore include :
  • ⁇ -amylases characterised by having a specific activity at least 25% higher than the specific activity of Termamyl® at a temperature range of 25°C to 55°C and at a pH value in the range of 8 to 10, measured by the Phadebas® -amylase activity assay.
  • Phadebas® ⁇ -amylase activity assay is described at pages 9-10, WO95/26397.
  • ⁇ -amylases according (a) comprising the amino sequence shown in the SEQ ID listings in the above cited reference, or an ⁇ -amylase being at least 80%> homologous with the amino acid sequence shown in the SEQ ID listing.
  • ⁇ -amylases according (a) obtained from an alkalophilic Bacillus species, comprising the following amino sequence in the N-terminal : His-His-Asn-Gly-Thr-Asn-Gly-Thr- Met-Met-Gln-Tyr-Phe-Glu-T ⁇ -Tyr-Leu-Pro-Asn-Asp.
  • a polypeptide is considered to be X%> homologous to the parent amylase if a comparison of the respective amino acid sequences, performed via algorithms, such as the one described by Lipman and Pearson in Science 227, 1985, p. 1435, reveals an identity of X%
  • ⁇ -amylases according (a-c) wherein the ⁇ -amylase is obtainable from an alkalophilic Bacillus species; and in particular, from any of the strains NCIB 12289, NCIB 12512, NCIB 12513 and DSM 935.
  • the term "obtainable from” is intended not only to indicate an amylase produced by a Bacillus strain but also an amylase encoded by a DNA sequence isolated from such a Bacillus strain and produced in an host organism transformed with said DNA sequence.
  • Variants of the following parent ⁇ -amylases which (i) have one of the amino acid sequences shown in corresponding respectively to those ⁇ -amylases in (a-e), or (ii) displays at least 80%o homology with one or more of said amino acid sequences, and or displays immunological cross-reactivity with an antibody raised against an ⁇ -amylase having one of said amino acid sequences, and/or is encoded by a DNA sequence which hybridizes with the same probe as a DNA sequence encoding an ⁇ -amylase having one of said amino acid sequence; in which variants :
  • At least one amino acid residue has been inserted relative to said parent ⁇ - amylase; said variant having an ⁇ -amylase activity and exhibiting at least one of the following properties relative to said parent ⁇ -amylase : increased thermostability, increased stability towards oxidation, reduced Ca ion dependency, increased stability and/or ⁇ -amylolytic activity at neutral to relatively high pH values, increased ⁇ -amylolytic activity at relatively high temperature and increase or decrease of the isoelectric point (pi) so as to better match the pi value for ⁇ - amylase variant to the pH of the medium.
  • amylases suitable herein include, for example, ⁇ -amylases described in GB
  • TERMAMYL® Novo. FUNGAMYL® from Novo is especially useful.
  • Engineering of enzymes for improved stability e.g., oxidative stability, is known. See, for example J. Biological Chem., Vol. 260, No. 11, June 1985, pp. 6518-6521.
  • Certain preferred embodiments of the present compositions can make use of amylases having improved stability in detergents such as automatic dishwashing types, especially improved oxidative stability as measured against a reference-point of TERMAMYL® in commercial use in 1993.
  • amylases herein share the characteristic of being "stability-enhanced" amylases, characterized, at a minimum, by a measurable improvement in one or more of: oxidative stability, e.g., to hydrogen peroxide/tetraacetylethylenediamine in buffered solution at pH 9-10; thermal stability, e.g., at common wash temperatures such as about 60°C; or alkaline stability, e.g., at a pH from about 8 to about 11, measured versus the above-identified reference-point amylase. Stability can be measured using any of the art-disclosed technical tests. See, for example, references disclosed in WO 9402597.
  • Stability-enhanced amylases can be obtained from Novo or from Genencor International.
  • One class of highly preferred amylases herein have the commonality of being derived using site-directed mutagenesis from one or more of the Bacillus amylases, especially the Bacillus ⁇ -amylases, regardless of whether one, two or multiple amylase strains are the immediate precursors.
  • Oxidative stability- enhanced amylases vs. the above-identified reference amylase are preferred for use, especially in bleaching, more preferably oxygen bleaching, as distinct from chlorine bleaching, detergent compositions herein.
  • Such preferred amylases include (a) an amylase according to the hereinbefore inco ⁇ orated WO 9402597, Novo, Feb.
  • amylase Stability was measured in CASCADE® and SUNLIGHT®;
  • particularly preferred amylases herein include amylase variants having additional modification in the immediate parent as described in WO 9510603 A and are available from the assignee,
  • oxidative stability enhanced amylase include those described in WO 9418314 to Genencor International and WO 9402597 to Novo. Any other oxidative stability-enhanced amylase can be used, for example as derived by site-directed mutagenesis from known chimeric, hybrid or simple mutant parent forms of available amylases. Other preferred enzyme modifications are accessible. See WO 9509909 A to Novo.
  • carbohydrase enzymes which impart antimicrobial activity may also be included in the present invention.
  • Such enzymes include endoglycosidase, Type II endoglycosidase and glucosidase as disclosed in U.S. Patent Nos. 5,041,236, 5,395,541, 5,238,843 and 5,356,803 the disclosures of which are herein inco ⁇ orated by reference.
  • other enzymes having antimicrobial activity may be employed as well including peroxidases, oxidases and various other enzymes.
  • compositions of the present invention when any enzyme is present in the composition.
  • Perfumes - Perfumes and perfumery ingredients useful in the present compositions and processes comprise a wide variety of natural and synthetic chemical ingredients, including, but not limited to, aldehydes, ketones, esters, and the like. Also included are various natural extracts and essences which can comprise complex mixtures of ingredients, such as orange oil, lemon oil, rose extract, lavender, musk, patchouli, balsamic essence, sandalwood oil, pine oil, cedar, and the like. Finished perfumes can comprise extremely complex mixtures of such ingredients. Finished perfumes typically comprise from about 0.01 %> to about 2%>, by weight, of the detergent compositions herein, and individual perfumery ingredients can comprise from about 0.0001 %> to about 90% of a finished perfume composition.
  • Non-limiting examples of perfume ingredients useful herein include: 7-acetyl- l,2,3,4,5,6,7,8-octahydro-l,l,6,7-tetramethyl naphthalene; ionone methyl; ionone gamma methyl; methyl cedrylone; methyl dihydrojasmonate; methyl 1,6,10-trimethyl- 2,5,9-cyclododecatrien-l-yl ketone; 7-acetyl-l,l,3,4,4,6-hexamethyl tetralin; 4-acetyl-6- tert-butyl- 1,1 -dimethyl indane; para-hydroxy-phenyl-butanone; benzophenone; methyl beta-naphthyl ketone; 6-acetyl-l, 1,2,3,3, 5-hexamethyl indane; 5-acetyl-3-isopropyl- 1,1,2,6-tetramethyl indane; 1-do
  • perfume materials are those that provide the largest odor improvements in finished product compositions containing cellulases.
  • These perfumes include but are not limited to: hexyl cinnamic aldehyde; 2-methyl-3-(para-tert- butylphenyl)-propionaldehyde; 7-acetyl- 1 ,2,3,4,5,6,7,8-octahydro- 1 , 1 ,6,7-tetramethyl naphthalene; benzyl salicylate; 7-acetyl- 1,1, 3, 4,4,6-hexamethyl tetralin; para-tert-butyl cyclohexyl acetate; methyl dihydro jasmonate; beta-napthol methyl ether; methyl beta- naphthyl ketone; 2-methyl-2-(para-iso-propylphenyl)-propionaldehyde; 1,3,4,6,7,8- hexahydro-4,6,6,7,8,8
  • perfume materials include essential oils, resinoids, and resins from a variety of sources including, but not limited to: Peru balsam, Olibanum resinoid, styrax, labdanum resin, nutmeg, cassia oil, benzoin resin, coriander and lavandin.
  • Still other perfume chemicals include phenyl ethyl alcohol, te ⁇ ineol, linalool, linalyl acetate, geraniol, nerol, 2-(l,l-dimethylethyl)-cyclohexanol acetate, benzyl acetate, and eugenol.
  • Carriers such as diethylphthalate can be used in the finished perfume compositions.
  • compositions used in the methods of the present invention may also optionally contain from about 0.1 %> to about 20%>, more preferably from about 0.5% to about 10%) by weight of the composition of a dispersant polymer.
  • Dispersant polymers are compounds which act as soil suspending agents in the aqueous wash liquor. That is, they act to suspend the soils in solution and prevent the soils from re-depositing on the surfaces of fabrics or dishes. This allows soils to be removed with the wash liquor.
  • Dispersant polymers are well-known and conventional and are available from BASF Co ⁇ . and Rohm & Haas. Typical examples include polyethoxylated amines and acrylic acid/maleic acid copolymers. Soil Release Agents
  • compositions according to the present invention may optionally comprise one or more soil release agents.
  • Polymeric soil release agents are characterized by having both hydrophilic segments, to hydrophilize the surface of hydrophobic fibers, such as polyester and nylon, and hydrophobic segments, to deposit upon hydrophobic fibers and remain adhered thereto through completion of the laundry cycle and , thus, serve as an anchor for the hydrophilic segments. This can enable stains occuring subsequent to treatment with the soil release agent to be more easily cleaned in later washing procedures.
  • soil release agents will generally comprise from about 0.01% to about 10%) preferably from about 0.1 %> to about 5%, more preferably from about 0.2%> to about 3% by weight, of the composition.
  • optical brighteners or other brightening or whitening agents known in the art can be present at levels typically from about 0.05% to about 1.2%, by weight, in the compositions used herein.
  • Commercial optical brighteners which may be useful in the present invention can be classified into subgroups, which include, but are not necessarily limited to, derivatives of stilbene, pyrazoline, coumarin, carboxylic acid, methinecyanines, dibenzothiphene-5,5-dioxide, azoles, 5- and 6-membered-ring heterocycles, and other miscellaneous agents. Examples of such brighteners are disclosed in "The Production and Application of Fluorescent Brightening Agents", M. Zahradnik, Published by John Wiley & Sons, New York (1982).
  • optical brighteners which are useful in the present compositions are those identified in U.S. Patent 4,790,856, issued to Wixon on December 13, 1988. These brighteners include the PHOR WHITE series of brighteners from Verona. Other brighteners disclosed in this reference include: Tinopal UNPA, Tinopal CBS and Tinopal 5BM; available from Ciba-Geigy; Artie White CC and Artie White CWD, available from Hilton-Davis, located in Italy; the 2-(4-stryl-phenyl)-2H- napthol[l,2-d]triazoles; 4,4'-bis- (l,2,3-triazol-2-yl)-stil- benes; 4,4'-bis(stryl)bisphenyls; and the aminocoumarins.
  • these brighteners include 4-methyl-7- diethyl- amino coumarin; l,2-bis(-venzimidazol-2-yl)ethylene; 1,3-diphenyl-phrazolines; 2,5-bis(benzoxazol-2-yl)thiophene; 2-stryl-napth-[l,2-d]oxazole; and 2-(stilbene-4-yl)- 2H-naphtho- [l,2-d]triazole. See also U.S. Patent 3,646,015, issued February 29, 1972 to Hamilton. Anionic brighteners are preferred herein.
  • compositions can further preferably comprise one or more detersive adjuncts selected from the following: polysaccharides, abrasives, bactericides, tarnish inhibitors, dyes, buffers, antifungal or mildew control agents, insect repellents, perfumes, thickeners, processing aids, anti-corrosive aids, stabilizers and antioxidants.
  • detersive adjuncts selected from the following: polysaccharides, abrasives, bactericides, tarnish inhibitors, dyes, buffers, antifungal or mildew control agents, insect repellents, perfumes, thickeners, processing aids, anti-corrosive aids, stabilizers and antioxidants.
  • detersive adjuncts selected from the following: polysaccharides, abrasives, bactericides, tarnish inhibitors, dyes, buffers, antifungal or mildew control agents, insect repellents, perfumes, thickeners, processing aids, anti-corrosive aids, stabilizers and
  • Usual ingredients can include one or more materials for assisting or enhancing cleaning performance, treatment of the substrate to be cleaned, or to modify the aesthetics of the composition.
  • Usual detersive adjuncts of detergent compositions include the ingredients set forth in U.S. Pat. No. 3,936,537, Baskerville et al.
  • Adjuncts which can also be used in the compositions employed in the present invention, in their conventional art-established levels for use (generally from 0%> to about 20%> of the detergent ingredients, preferably from about 0.5% to about 10%>), include other active ingredients such as enzyme stabilizers, color speckles, anti-tarnish and/or anti-corrosion agents, dyes, fillers, optical brighteners, germicides, alkalinity sources, anti-oxidants, enzyme stabilizing agents, perfumes, dyes, solubilizing agents, clay soil removal/anti- redeposition agents, carriers, processing aids, pigments, solvents for liquid formulations, fabric softeners, static control agents, etc.
  • active ingredients such as enzyme stabilizers, color speckles, anti-tarnish and/or anti-corrosion agents, dyes, fillers, optical brighteners, germicides, alkalinity sources, anti-oxidants, enzyme stabilizing agents, perfumes, dyes, solubilizing agents, clay soil removal/anti- redeposition agents, carriers, processing
  • Dye transfer inhibiting agents including polyamine N-oxides such as polyvinylpyridine N-oxide can be used.
  • Dye-transfer- inhibiting agents are further illustrated by polyvinylpyrrolidone and copolymers of N- vinyl imidazole and N-vinyl pyrrolidone.
  • soluble magnesium salts such as MgC_2, MgSO4, and the like, can be added at levels of, typically, 0.1%-2%, to enhance grease removal performance.
  • detersive ingredients employed in the present compositions optionally can be further stabilized by absorbing said ingredients onto a porous hydrophobic substrate, then coating said substrate with a hydrophobic coating.
  • the detersive ingredient is admixed with a surfactant before being absorbed into the porous substrate.
  • the detersive ingredient is released from the substrate into the aqueous washing liquor, where it performs its intended detersive function.
  • a porous hydrophobic silica (trademark SIPERNAT D10, DeGussa) is admixed with a proteolytic enzyme solution containing 3%)-5%> of C13.15 ethoxylated alcohol (EO 7) nonionic surfactant.
  • the enzyme/surfactant solution is 2.5 X the weight of silica.
  • the resulting powder is dispersed with stirring in silicone oil (various silicone oil viscosities in the range of 500- 12,500 can be used).
  • silicone oil dispersion is emulsified or otherwise added to the final detergent matrix.
  • ingredients such as the aforementioned enzymes, bleaches, bleach activators, bleach catalysts, photoactivators, dyes, fluorescers, fabric conditioners and hydrolyzable surfactants can be "protected" for use in detergent compositions.
  • An antioxidant can be optionally added to the detergent compositions of the present invention. They can be any conventional antioxidant used in detergent compositions, such as 2,6-di-tert-butyl-4-methylphenol (BHT), carbamate, ascorbate, thiosulfate, monoethanolamine(MEA), diethanolamine, triethanolamine, etc. It is preferred that the antioxidant, when present, be present in the composition from about 0.001% to about 5% by weight.
  • BHT 2,6-di-tert-butyl-4-methylphenol
  • MEA monoethanolamine
  • MEA diethanolamine
  • triethanolamine triethanolamine
  • compositions of this invention can be in any form, including liquid, tablet, paste, gel, microemulsion or tricritical composition. Highly preferred embodiments are in liquid or gel form.
  • Liquid detergent compositions can contain water and other solvents as carriers. Low molecular weight primary or secondary alcohols exemplified by methanol, ethanol, propanol, and isopropanol are suitable. Monohydric alcohols are preferred for solubilizing surfactant, but polyols such as those containing from 2 to about 6 carbon atoms and from 2 to about 6 hydroxy groups (e.g., 1,3-propanediol, ethylene glycol, glycerine, and 1,2-propanediol) can also be used.
  • the compositions may contain from 5% to 90%,, typically 10% to 50% of such carriers.
  • compositions of the invention will have a pH range of from about 2 to about 13, preferably, pH is alkaline, more preferably from about 7 to about 12.5, more preferably from about 8 to about 12, even more preferably from about 9 to about 11.5.
  • pH is alkaline, more preferably from about 7 to about 12.5, more preferably from about 8 to about 12, even more preferably from about 9 to about 11.5.
  • compositions are low foaming and have an IFT within the essential range. weight %
  • Liquid gel-like compositions according to the present invention as prepared as followed:

Abstract

The present invention relates to ultrasonic cleaning compositions, or UCC's comprising from about 0.001 % to about 99 %, preferably from about 0.01 % to about 90 %, more preferably from about 0.1 % to about 80 %, even more preferably from about 0.5 % to about 75 %, by weight of composition of an ultrasonic cleaning agent, wherein said composition is low foaming, has an inter facial tension of from about 10 mNm-1 to about 0.0001 mNm-1, preferably from about 1 mNm-1 to about 0.0001 mNm-1, more preferably from about 1 mNm-1 to about 0.001 mNm-1 and is substantially free antifoaming agents.

Description

ULTRASONIC CLEANING COMPOSITIONS
Field of the Invention
The present invention relates to a novel class of cleaning compositions which are specifically formulated for use with ultrasonic cleaning devices.
Background of the Invention
Ultrasonic cleaning is a well known cleaning process in industry. For example, it is used to clean electronic components after or during immersion in cleaning solution such as azeotropic mixtures of flurohydrocarbons. It is also used domestically to a small extent in oral hygiene, as in ultrasonic tooth brushes. However, ultrasonic cleaning has not found much acceptance domestically beyond this limited application.
While some limited application ultrasonic devices are available for domestic use there is no cleaning formula available which is specifically formulated to be used with ultrasonic generating devices for cleaning household items such as, dishes, tableware, sinks, tables, or clothes. Using a hand dishwashing composition, or LDL, with an ultrasonic device, results in an excess of foam being produced which would prevent, or reduce the surfactancy of the LDL. There are no LDL's available to the consumer today which include enzymes and these are highly desirable in any cleaning application. Furthermore, the near neutral pH and the lack of any strong builders in the LDL's available to today's consumers severely in combinations with the other problems mentioned previously, reduces the usefulness of current LDL's to ultrasonic applications. Alternatively, using a automatic dishwashing composition (ADW compositions), while avoiding the excess foaming produced, which is an inherent problem associated with in using LDL's with ultrasonics, would be unusable because of the caustic nature, typically pH 9 and up, of ADW compositions make them unsuitable for use other than in a dishwasher. Furthermore, ADW compositions are low in surfactant, typically they contain about 1% or less of surfactant and have poor or low solubility. Consequently, the need remains for a ultrasonic cleaning composition, which is usable in any domestic ultrasonic cleaning application. A composition which combines the beneficial properties of LDL's and ADW compositions, without the negatives of either.
Background 'Art
US 5,464,477, US 5,529,788, US4,308,229, US 4,448,750; WO 94/07989, WO 97/16263, WO 94/23852, WO 93/06947; GB 2,204,321; EP 258,819; DE 4,100,682; JP 10036892, JP 08157888.
Summary of the Invention It has been surprisingly found that an ultrasonic composition which combines the positives of both LDL's and ADW compositions without the downsides of these respective compositions. These compositions are suitable for use in any domestic use to which ultrasonic cleaning devices can be put.
The ultrasonic cleaning compositions, or UCC's, of the present invention comprise from about 0.001% to about 99%, preferably from about 0.01% to about 90%, more preferably from about 0.1% to about 80%, even more preferably from about 0.5% to about 75%), by weight of composition of an ultrasonic cleaning agent, wherein said composition is low foaming, has an inter facial tension of from about 10 mNm"1 to about 0.0001 mNm"1, preferably from about 1 mNm"1 to about 0.0001 mNm"1, more preferably from about 1 mNm"1 to about 0.001 mNm"1 and is substantially free of antifoaming agents.
As used herein, the phrase "ultrasonic waves" means mechanical pressure or stress waves which can propagate through any material media, wherein the frequency spectra of these waves can vary from a few cycles/second (Hz) to a few billion Hz.
By using this composition with a source of ultrasonic energy, stains or tough soils can be removed without the use of excessive force, rubbing, pressure or other manipulation which causes wear and tear on the stained material or surface. In doing so, the user does not need to impart such manual energy to remove the stain, thereby adding to the convenience of the user. The invention also encompasses processes by which such stains or soils are removed, either from localized regions or from the entire article to be cleaned. The present application also includes methods of washing tableware and hard surfaces by either applying a neat or aqueous solution to the soil or stain, to be removed form the surface and the imparting ultrasonic waves to the soil or stain. Furthermore, the present application also includes methods of washing tableware by contacting the tableware with an aqueous solution, such as by immersion in an aqueous solution, then imparting ultrasonic waves to said soiled tableware. It is preferred that the surface be a hard surface. A "hard surface" is any surface which is traditionally regarded as hard, that is tableware, such as plates, glasses, cutlery, pots and pans, and also includes other surfaces such as kitchen counter tops, sinks, glass, windows, enamel surfaces, metal surfaces, tiles, bathtubs, floors etc. More preferably, the hard surface is tableware.
All parts, percentages and ratios used herein are expressed as percent weight unless otherwise specified. All documents cited are, in relevant part, incorporated herein by reference.
Detailed Description of the Invention
As it was stated previously, the ultrasonic cleaning compositions, or UCC's, of the present invention comprise from about 0.001% to about 99%, preferably from about 0.01 % to about 90%), more preferably from about 0.1 % to about 80%, even more preferably from about 0.5% to about 75%, by weight of composition of an ultrasonic cleaning agent, wherein said composition is low foaming, has an inter facial tension of from about 10 mNm"1 to about 0.0001 mNm"1, preferably from about 1 mNm"1 to about 0.0001 mNm"1, more preferably from about 1 mNm"1 to about 0.001 mNm"1 and is substantially free antifoaming agents.
By substantially free antifoaming agents it means that no antifoaming agents are added by the formulator. By antifoam, it is meant silicone antifoams and fatty acid antifoaming agents. However, trace amounts, such as less than 0.5%, preferably less than 0.1 %, most preferably about 0%, which are present as impurities or the like, can be tolerated by the compositions of the present invention. However, it is most preferred that the compositions of the present invention be totally free, i.e. 0% of any antifoaming agents, either added by the formulator or present as impurities.
An ultrasonic cleaning composition comprises an ultrasonic cleaning agent. This ultrasonic cleaning agent is any cleaning agent which is suitable for use in ultrasonic cleaning, that is, these ultrasonic cleaning agents when in the ultrasonic cleaning composition do not alter the physical characteristics of that composition outsides the essential parameters. Some suitable ultrasonic cleaning agents include builders, surfactants, enzymes, bleach activators, antibacterial agent, bleach catalysts, bleach boosters, bleaches, alkalinity sources, colorants, perfume, lime soap dispersants, polymeric dye transfer inhibiting agents, crystal growth inhibitors, photobleaches, heavy metal ion sequestrants, anti-tarnishing agents, anti-microbial agents, anti-oxidants, anti- redeposition agents, soil release polymers, electrolytes, pH modifiers, thickeners, abrasives, divalent metal ions, metal ion salts, enzyme stabilizers, corrosion inhibitors, diamines, suds stabilizing polymers, solvents, process aids, fabric softening agents, optical brighteners, hydrotropes. and mixtures thereof.
The ultrasonic cleaning compositions of the present invention are low foaming. That is the composition is formulated such that when ultrasonic waves or energy is applied to a neat or aqueous solution of the composition any foam generated with not interfere with the cleaning. It is preferred that the ultrasonic cleaning composition of the present invention have a suds height of less than about 80 mm, more preferably 50 mm according to the suds cylinder test, see hereinafter.
The following test and others of similar nature are used to evaluate the suitability of the formulas described herein. A polyethylene 2 L graduated cylinder is filled to the 1 L graduation mark with an aqueous (water = 7 grain) solution comprising from about 500 to about 20,000 ppm of a liquid detergent composition according to the present invention. The solution is first agitated then subsequently challenged with portions of greasy soil with agitation between each subsequent soil addition. The suds volume can be easily determined by using the vacant volume of the 2 L cylinder as a guide.
The compositions of the present invention may be of any suitable form, such as liquid, tablet, paste, gel, aerosol or microemulsion.
The present invention also includes within its scope methods of washing tableware said method comprising contacting soiled tableware in need of cleaning with an aqueous solution of the ultrasonic cleaning composition as defined hereinbefore and then imparting ultrasonic waves to said soiled tableware. The present invention also includes within its scope methods of removing tough food soil from a hard surface said method comprising contacting said soil with either an aqueous solution or a neat solution of the ultrasonic cleaning composition and then imparting ultrasonic waves to said soil.
The source of ultrasonic or sonic energy or waves can be from any suitable source. A variety of sonic or ultrasonic sources can be used in the invention including, but not limited to, sonic cleaning baths typically used to clean jewelry and sonic toothbrushes for cleaning teeth. This includes basins or sinks, such as the Branson Ultrasonic Bath, ultrasonic "balls", which are dropped into a conventional sink or basin, such as the Sonic Wash Ball by "D&P Wash Machine", baskets or racks into which the item to be cleaned is placed ant this is then placed into a conventional sink or basin. Alternatively, the source of ultrasonic energy could be provided by a modified ultrasonic tooth brush, such as the Teldyne Water Pik model SR-400R. It is one preferred aspect that sonic or ultrasonic source is a, hand-held vibrational ultrasonic device with a cleaning head one distal end of said device. It is another preferred aspect that in ultrasonic cleaning product the cleaning composition and the sonic or ultrasonic source contained in together in a device that permits controlled dispensing of the cleaning composition to a hard surface in need of cleaning, while concurrently imparting sonic or ultrasonic waves thereto.
In one aspect of the present invention the acoustic system, which generates the sonic or ultrasonic waves is made from a piezo ceramic element or elements, typically called PZTs, along with an acoustic amplifier, typically called an acoustic horn or acoustic transducer or sonotrode. The entire acoustic system is designed to operate at a specific frequency and power and deliver a predetermined amplitude at the end or tip of the sonotrode. The combination of the sonotrode design, amplitude, frequency and power dictates the cleaning efficacy. Further, not all of the parameters are independently choosen.
With regards to the design of the sonotrode, a variety of different shapes provide improved cleaning benefits. One specific embodiment is a "chisel" design, where the sonotrode is tapered at the end which will contact, or be proximate to, the stain/soil to be removed. Typically, the width of the sonotrode is much less than its length. For example the sonotrode may be 0.05 to 5 mm wide and the is 10 to 50 mm long. In one embodiment, cleaning is improved when the sonotrode is designed to deliver equal amplitude across the sonotrode blade. However, there are other embodiments where having a higher localized amplitude is prefered. In one embodiment, it has surprisingly been found that a sonotrode blade in a "chisel" shape running at 50kHz, 30 Watts and 40 microns provides significant cleaning benefits.
In another embodiment, it has surprisingly been found that sonotrodes designed in a "disc" or round shape deliver significant cleaning benefits. This sonotrode embodiment typically has a disc radius of from 10 to about 100 mm. Further, the sonotrode may present a more three dimensional appearance to the stain/soil to be cleaned. The sonotrode may be in the shape of a hemisphere or may be disc shaped with undulations or dimples on the surface. In another embodiment, the sonotrode can be rectangular, oval, triangular shaped. Because of ergonomic considerations, it is preferred that the sonotrode have rounded edges. Each of these different embodiments offers unique cleaning opportunities. In addition, the mass of the sonotrode is important to achieve the desired cleaning benefit. It has surprisingly been found that the sonotrode must have a mass between 20 and 500 grams.
Further, the sonotrode material must be chosen to have the desired acoustic properties and also be compatible with the chemistry being used in the cleaning application. Suitable materials include titanium, aluminum and steel, preferably hardened steel. Less preferred, but acceptable for cleaners which are substantially free from bleaches and alkalinity is aluminum.
In another aspect of the present invention the acoustic system and in particular the sonotrode may be encased, surrounded, or in close proximity to adjunct materials to aid in the cleaning process. These include, but are not limited to, sponges, scouring pads, steel wool pads, high friction non-wovens, and absorbent natural and synthetic materials. These adjunct materials can help cleaning by removing the soils and stains that are loosened by the ultrasonic plus chemistry, and/or they can act to absorb residual stains and/or hold the cleaning solution in close contact with the stain or soil which is in contact with the ultrasonic energy. Optionally, these adjunct pads can be removable and/or disposable.
Another possible ultrasonic generation device is that of copending application US 60/180,629, Attorneys docket number 7341, filed on November 16, 1998. The transducer means oscillates at a frequency of from about 100 Hz to about 20,000 kHz, more preferably from about 100 Hz to about 10,000 kHz, more preferably from about 150 Hz to about 2000 kHz, more preferably from about 150 Hz to about 1,000 kHz, more preferably from about 150 Hz to about 100 kHz, more preferably from about 200 Hz to about 50 kHz. It is preferred that the average frequency be from about 1000 Hz to about 100kHz, more preferably from about 10,000 Hz to about 70kHz. It is also preferred that the device provides a power output per unit of surface area of said cleaning head of at least about 0.02 watts/cm2, more preferably at least about 0.05 watts/cm2, even more preferably at least about 0.07 watts/cm2, even more preferably still at least about 0.08 watts/cm2.
Typical treatment times range from about 1 second to about 5 minutes, more typically from about 20 seconds to about 2 minutes, and most typically from about 30 seconds to 1 minute, although treatment times will vary with the severity of the stain or toughness of the soil. The ultrasonic source device can be a vibrational ultrasonic generator, a torsional ultrasonic wave generator, or an axial ultrasonic generator in that it is the shock waves generated by these ultrasonic sources that does the actual cleaning or loosening of the stain on the textile regardless of the mechanism by which the ultrasonic shock waves are generated. The ultrasonic wave generating device can be battery operated or a plug-in type. Ultrasonic Cleaning Agent
The compositions herein include one or more ultrasonic cleaning agent for assisting or enhancing cleaning performance, treatment of the substrate to be cleaned, or to modify the aesthetics of the detergent composition (e.g., perfumes, colorants, dyes, etc.). The following are illustrative examples of such adjunct materials. Detergent Builders
The present invention may include an optional builder in the product composition. The level of detergent salt/builder can vary widely depending upon the end use of the composition and its desired physical form. When present, the compositions will typically comprise at least about 1% detergent builder and more typically from about 10%) to about 80%), even more typically from about 15%) to about 50%> by weight, of the detergent builder. Lower or higher levels, however, are not meant to be excluded. Inorganic or P-containing detergent builders include, but are not limited to, the alkali metal, ammonium and alkanolammonium salts of polyphosphates (exemplified by the tripolyphosphates, pyrophosphates, and glassy polymeric meta-phosphates), phosphonates, phytic acid, silicates, carbonates (including bicarbonates and sesquicarbonates), sulphates, and aluminosilicates. However, non-phosphate salts are required in some locales. Importantly, the compositions herein function surprisingly well even in the presence of the so-called "weak" builders (as compared with phosphates) such as citrate, or in the so-called "underbuilt" situation that may occur with zeolite or layered silicate builders.
Examples of silicate builders are the alkali metal silicates, particularly those having a SiO2:Na2O ratio in the range 1.6:1 to 3.2:1 and layered silicates, such as the layered sodium silicates described in U.S. Patent 4,664,839, issued May 12, 1987 to H. P. Rieck. NaSKS-6 is the trademark for a crystalline layered silicate marketed by Hoechst (commonly abbreviated herein as "SKS-6"). Unlike zeolite builders, the Na SKS-6 silicate builder does not contain aluminum. NaSKS-6 has the delta-Na2SiO5 morphology form of layered silicate. It can be prepared by methods such as those described in German DE-A-3 ,417,649 and DE-A-3, 742,043. SKS-6 is a highly preferred layered silicate for use herein, but other such layered silicates, such as those having the general formula NaMSixO2x+l.yH2O wherein M is sodium or hydrogen, x is a number from 1.9 to 4, preferably 2, and y is a number from 0 to 20, preferably 0 can be used herein. Various other layered silicates from Hoechst include NaSKS-5, NaSKS-7 and NaSKS-11, as the alpha, beta and gamma forms. As noted above, the delta-Na2SiO5 (NaSKS-6 form) is most preferred for use herein. Other silicates may also be useful such as for example magnesium silicate, which can serve as a crispening agent in granular formulations, as a stabilizing agent for oxygen bleaches, and as a component of suds control systems.
Examples of carbonate salts as builders are the alkaline earth and alkali metal carbonates as disclosed in German Patent Application No. 2,321,001 published on November 15, 1973.
Aluminosilicate builders may also be added to the present invention as a detergent salt. Aluminosilicate builders are of great importance in most currently marketed heavy duty granular detergent compositions. Aluminosilicate builders include those having the empirical formula:
Mz(zAlO2)y]-xH2O wherein z and y are integers of at least 6, the molar ratio of z to y is in the range from 1.0 to about 0.5, and x is an integer from about 15 to about 264.
Useful aluminosilicate ion exchange materials are commercially available. These aluminosilicates can be crystalline or amorphous in structure and can be naturally- occurring aluminosilicates or synthetically derived. A method for producing aluminosilicate ion exchange materials is disclosed in U.S. Patent 3,985,669, Krummel, et al, issued October 12, 1976. Preferred synthetic crystalline aluminosilicate ion exchange materials useful herein are available under the designations Zeolite A, Zeolite P (B), Zeolite MAP and Zeolite X. In an especially preferred embodiment, the crystalline aluminosilicate ion exchange material has the formula:
Na12[(Alθ2)i2(Siθ2)i2]-xH2O wherein x is from about 20 to about 30, especially about 27. This material is known as Zeolite A. Dehydrated zeolites (x = 0 - 10) may also be used herein. Preferably, the aluminosilicate has a particle size of about 0.1-10 microns in diameter.
Organic detergent builders suitable for the purposes of the present invention include, but are not restricted to, a wide variety of polycarboxylate compounds. As used herein, "polycarboxylate" refers to compounds having a plurality of carboxylate groups, preferably at least 3 carboxylates. Polycarboxylate builder can generally be added to the composition in acid form, but can also be added in the form of a neutralized salt. When utilized in salt form, alkali metals, such as sodium, potassium, and lithium, or alkanolammonium salts are preferred.
Included among the polycarboxylate builders are a variety of categories of useful materials. One important category of polycarboxylate builders encompasses the ether polycarboxylates, including oxydisuccinate, as disclosed in Berg, U.S. Patent 3,128,287, issued April 7, 1964, and Lamberti et al, U.S. Patent 3,635,830, issued January 18, 1972. See also "TMS/TDS" builders of U.S. Patent 4,663,071, issued to Bush et al, on May 5, 1987. Suitable ether polycarboxylates also include cyclic compounds, particularly alicyclic compounds, such as those described in U.S. Patents 3,923,679; 3,835,163; 4,158,635; 4,120,874 and 4,102,903.
Other useful detergency builders include the ether hydroxypolycarboxylates, copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1, 3, 5-trihydroxy benzene-2, 4, 6-trisulphonic acid, and carboxyrhethyloxysuccinic acid, the various alkali metal, ammonium and substituted ammonium salts of polyacetic acids such as ethylenediamine tetraacetic acid and nitrilotriacetic acid, as well as polycarboxylates such as mellitic acid, succinic acid, oxydisuccinic acid, polymaleic acid, benzene 1,3,5- tricarboxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof.
Citrate builders, e.g., citric acid and soluble salts thereof (particularly sodium salt), are polycarboxylate builders of particular importance. Oxydisuccinates are also especially useful in such compositions and combinations.
Also suitable in the detergent compositions of the present invention are the 3,3- dicarboxy-4-oxa-l,6-hexanedioates and the related compounds disclosed in U.S. Patent 4,566,984, Bush, issued January 28, 1986. Useful succinic acid builders include the C5- C20 alkyl and alkenyl succinic acids and salts thereof. A particularly preferred compound of this type is dodecenylsuccinic acid. Specific examples of succinate builders include: laurylsuccinate, myristylsuccinate, palmitylsuccinate, 2- dodecenylsuccinate (preferred), 2-pentadecenylsuccinate, and the like. Laurylsuccinates are the preferred builders of this group, and are described in European Patent Application 86200690.5/0,200,263, published November 5, 1986.
Other suitable polycarboxylates are disclosed in U.S. Patent 4,144,226, Crutchfield et al, issued March 13, 1979 and in U.S. Patent 3,308,067, Diehl, issued March 7, 1967. See also Diehl U.S. Patent 3,723,322.
Fatty acids, e.g., C12-C18 monocarboxylic acids, can also be incorporated into the compositions alone, or in combination with the aforesaid builders, especially citrate and/or the succinate builders, to provide additional builder activity. Such use of fatty acids will generally result in a diminution of sudsing, which should be taken into account by the formulator. Surfactants Surfactants may be included in the compositions of the present invention as ultrasonic cleaning agent. The surfactant may comprise from about 0.01 %>, to about 99.9%o, by weight of the composition depending upon the particular surfactants used and the effects desired. More typical levels comprise from about 0.1 %> to about 80%>, even more preferably from about 0.5%> to about 60%; by weight of the composition. Examples of suitable surfactants can be found in McCutcheon's EMULSIFIERS AND DETERGENTS, North American Edition, 1997, McCutcheon Division, MC Publishing Company, in U.S. 3,929,678, Dec. 30, 1975 Laughlin, et al, and U.S. 4,259,217, March 31, 1981, Murphy; in the series "Surfactant Science", Marcel Dekker, Inc., New York and Basel; in "Handbook of Surfactants", M.R. Porter, Chapman and Hall, 2nd Ed., 1994; in "Surfactants in Consumer Products", Ed. J. Falbe, Springer-Nerlag, 1987 and "Surface Active Agents and Detergents" (Vol. I and II by Schwartz, Perry and Berch) all of which are incorporated hereinbefore by reference.
The detersive surfactant can be nonionic, anionic, ampholytic, zwitterionic, or cationic. Mixtures of these surfactants can also be used. Preferred detergent compositions comprise anionic detersive surfactants or mixtures of anionic surfactants with other surfactants, especially nonionic surfactants and/or amphoteric surfactants.
Nonlimiting examples of surfactants useful herein include the conventional Cl l- C18 alkyl benzene sulfonates and primary, secondary and random alkyl sulfates, the C10- C18 alkyl alkoxy sulfates, the C10-C18 alkyl polyglycosides and their corresponding sulfated polyglycosides, C12-C18 alpha- sulfonated fatty acid esters, C12-C18 alkyl and alkyl phenol alkoxylates (especially ethoxylates and mixed ethoxy/propoxy), C12-C18 betaines and sulfobetaines ("sultaines"), C10-C18 amine oxides, C6 to C18 branched or linear alkyl sulfates, C6 to C18 branched or linear alkyl benzene sulfonates, C6 to C18 branched or linear alkyl alkoxy sulfates, and mixtures thereof, and the like. Other conventional useful surfactants are listed in standard texts. Anionic Surfactants -
The anionic surfactants useful in the present invention are preferably selected from the group consisting of, linear alkylbenzene sulfonate, alpha olefm sulfonate, paraffin sulfonates, alkyl ester sulfonates, alkyl sulfates, alkyl alkoxy sulfate, alkyl sulfonates, alkyl alkoxy carboxylate, alkyl alkoxylated sulfates, sarcosinates, taurinates, and mixtures thereof, more preferably C6 to Cj8 branched or linear alkyl sulfates, C6 to Cι8 branched or linear alkyl benzene sulfonates, C6 to C18 branched or linear alkyl alkoxy sulfates, and mixtures thereof. An effective amount, typically from about 0.5%> to about 90%), preferably about 5% to about 60%, more preferably from about 10 to about 30%, by weight of anionic detersive surfactant can be used in the present invention.
Alkyl sulfate surfactants are another type of anionic surfactant of importance for use herein. In addition to providing excellent overall cleaning ability when used in combination with polyhydroxy fatty acid amides (see below), including good grease/oil cleaning over a wide range of temperatures, wash concentrations, and wash times, dissolution of alkyl sulfates can be obtained, as well as improved formulability in liquid detergent formulations are water soluble salts or acids of the formula ROSO3M wherein
R preferably is a C10-C24 hydrocarbyl, preferably an alkyl or hydroxyalkyl having a C\ 0-C20 alkyl component, more preferably a Cι 2-Cι g alkyl or hydroxyalkyl, and M is H or a cation, e.g., an alkali (Group IA) metal cation (e.g., sodium, potassium, lithium), substituted or unsubstituted ammonium cations such as methyl-, dimethyl-, and trimethyl ammonium and quaternary ammonium cations, e.g., tetramethyl-ammonium and dimethyl piperdinium, and cations derived from alkanolamines such as ethanolamine, diethanolamine, triethanolamine, and mixtures thereof, and the like. Typically, alkyl chains of Cj2-16 are preferred for lower wash temperatures (e.g., below about 50°C) and Cl6-18 alkyl chains are preferred for higher wash temperatures (e.g., above about 50°C). Alkyl alkoxylated sulfate surfactants are another category of useful anionic surfactant. These surfactants are water soluble salts or acids typically of the formula RO(A)mSO3M wherein R is an unsubstituted C10-C24 alkyl or hydroxyalkyl group having a C10-C24 alkyl component, preferably a C12-C20 alkyl or hydroxyalkyl, more preferably C^-Cjg alkyl or hydroxyalkyl, A is an ethoxy or propoxy unit, m is greater than zero, typically between about 0.5 and about 6, more preferably between about 0.5 and about 3, and M is H or a cation which can be, for example, a metal cation (e.g., sodium, potassium, lithium, etc.), ammonium or substituted-ammonium cation. Alkyl ethoxylated sulfates as well as alkyl propoxylated sulfates are contemplated herein. Specific examples of substituted ammonium cations include methyl-, dimethyl-, trimethyl-ammonium and quaternary ammonium cations, such as tetramethyl- ammonium, dimethyl piperidinium and cations derived from alkanolamines, e.g. monoethanolamine, diethanolamine, and triethanolamine, and mixtures thereof. Exemplary surfactants are C12-C18 alkyl polyethoxylate (1.0) sulfate, C12-C18 alkyl polyethoxylate (2.25) sulfate, Ci 2-Cι g alkyl polyethoxylate (3.0) sulfate, and C12-C18 alkyl polyethoxylate (4.0) sulfate wherein M is conveniently selected from sodium and potassium. Surfactants for use herein can be made from natural or synthetic alcohol feedstocks. Chain lengths represent average hydrocarbon distributions, including branching.
Examples of suitable anionic surfactants are given in "Surface Active Agents and Detergents" (Vol. I and II by Schwartz, Perry and Berch). A variety of such surfactants are also generally disclosed in U.S. Patent 3,929,678, issued December 30, 1975 to Laughlin, et al. at Column 23, line 58 through Column 29, line 23.
Another possible surfactant are the so-called Dianionics. These are surfactants which have at least two anionic groups present on the surfactant molecule. Some suitable dianionic surfactants are further described in copending U.S. Serial No. 60/020,503 (Docket No. 6160P), 60/020,772 (Docket No. 6161P), 60/020,928 (Docket No. 6158P), 60/020,832 (Docket No. 6159P) and 60/020,773 (Docket No. 6162P) all filed on June 28, 1996, and 60/023,539 (Docket No. 6192P), 60/023493 (Docket No. 6194P), 60/023,540 (Docket No. 6193P) and 60/023,527 (Docket No. 6195P) filed on August 8th, 1996, the disclosures of which are incorporated herein by reference. Other conventional useful surfactants are listed in standard texts.
Nonionic Surfactants - One particularly preferred surfactants are nonionic surfactants. Nonionic surfactants may be present in amounts from 0.01%> to about 40%) by weight, preferably from about 0.1 % to about 30%, and most preferably from about 0.25% to about 20%.
Particularly preferred in the present invention include mixed nonionic surfactants. While a wide range of nonionic surfactants may be selected from for purposes of the mixed nonionic surfactant systems useful in the present invention compositions, it is preferred that the nonionic surfactants comprise both a low cloud point surfactant as represented by the ether capped poly(oxyalkylated) alcohol surfactant and high cloud point nonionic surfactant(s) as described as follows. "Cloud point", as used herein, is a well known property of nonionic surfactants which is the result of the surfactant becoming less soluble with increasing temperature, the temperature at which the appearance of a second phase is observable is referred to as the "cloud point" (See Kirk Othmer, pp. 360-362, hereinbefore).
As used herein, a "low cloud point" nonionic surfactant is defined as a nonionic surfactant system ingredient having a cloud point of less than 30°C, preferably less than about 20°C, and most preferably less than about 10°C and is represented by the ether- capped poly(oxyalkylated) alcohols as described herein.
Of course, other low-cloud point surfactants may be included in conjunction with the ether-capped poly(oxyalkylated) surfactants. Such optional low-cloud point surfactants include nonionic alkoxylated surfactants, especially ethoxylates derived from primary alcohol, and polyoxypropylene/polyoxyethylene/polyoxypropylene (PO/EO/PO) reverse block polymers. Also, such low cloud point nonionic surfactants include, for example, ethoxylated-propoxylated alcohol (e.g., Olin Corporation's Poly-Tergent® SLF18) and epoxy-capped poly(oxyalkylated) alcohols (e.g., Olin Corporation's Poly- Tergent® SLF18B series of nonionics, as described, for example, in WO 94/22800, published October 13, 1994 by Olin Corporation). These nonionic surfactants can optionally contain propylene oxide in an amount up to about 15% by weight. Other preferred nonionic surfactants can be prepared by the processes described in U.S. Patent 4,223,163, issued September 16, 1980, Builloty, incorporated herein by reference.
Optional low cloud point nonionic surfactants additionally comprise a polyoxyethylene, polyoxypropylene block polymeric compound. Block polyoxyethylene- polyoxypropylene polymeric compounds include those based on ethylene glycol, propylene glycol, glycerol, trimethylolpropane and ethylenediamine as initiator reactive hydrogen compound. Certain of the block polymer surfactant compounds designated PLURONIC®, REVERSED PLURONIC®, and TETRONIC® by the BASF-Wyandotte Corp., Wyandotte, Michigan, are suitable in ADD compositions of the invention. Preferred examples include REVERSED PLURONIC® 25R2 and TETRONIC® 702, Such surfactants are typically useful herein as low cloud point nonionic surfactants. As used herein, a "high cloud point" nonionic surfactant is defined as a nonionic surfactant system ingredient having a cloud point of greater than 40°C, preferably greater than about 50°C, and more preferably greater than about 60°C. Preferably the nonionic surfactant system comprises an ethoxylated surfactant derived from the reaction of a monohydroxy alcohol or alkylphenol containing from about 8 to about 20 carbon atoms, with from about 6 to about 15 moles of ethylene oxide per mole of alcohol or alkyl phenol on an average basis. Such high cloud point nonionic surfactants include, for example, Tergitol 15S9 (supplied by Union Carbide), Rhodasurf TMD 8.5 (supplied by Rhone Poulenc), and Neodol 91-8 (supplied by Shell).
It is also preferred for purposes of the present invention that the high cloud point nonionic surfactant further have a hydrophile-lipophile balance ("HLB"; see Kirk Othmer hereinbefore) value within the range of from about 9 to about 15, preferably 11 to 15. Such materials include, for example, Tergitol 15S9 (supplied by Union Carbide), Rhodasurf TMD 8.5 (supplied by Rhone Poulenc), and Neodol 91-8 (supplied by Shell).
Another preferred high cloud point nonionic surfactant is derived from a straight or preferably branched chain or secondary fatty alcohol containing from about 6 to about 20 carbon atoms (C6-C20 alcohol), including secondary alcohols and branched chain primary alcohols. Preferably, high cloud point nonionic surfactants are branched or secondary alcohol ethoxylates, more preferably mixed C9/11 or Cl 1/15 branched alcohol ethoxylates, condensed with an average of from about 6 to about 15 moles, preferably from about 6 to about 12 moles, and most preferably from about 6 to about 9 moles of ethylene oxide per mole of alcohol. Preferably the ethoxylated nonionic surfactant so derived has a narrow ethoxylate distribution relative to the average.
The preferred nonionic surfactant systems useful herein are mixed high cloud point and low cloud point nonionic surfactants combined in a weight ratio preferably within the range of from about 10:1 to about 1 :10.
Another preferred LFNIs are the endcapped alkyl alkoxylate surfactants. Suitable endcapped alkyl alkoxylate surfactant are the epoxy-capped poly(oxyalkylated) alcohols represented by the formula:
RlO[CH2CH(CH3)O]x[CH2CH2O]y[CH2CH(OH)R2] (I) wherein Ri is a linear or branched, aliphatic hydrocarbon radical having from 4 to 18 carbon atoms; R2 is a linear or branched aliphatic hydrocarbon radical having from 2 to
26 carbon atoms; x is an integer having an average value of from 0.5 to 1.5, more preferably 1; and y is an integer having a value of at least 15, more preferably at least 20.
Preferably, the surfactant of formula I, at least 10 carbon atoms in the terminal epoxide unit [CH2CH(OH)R2]. Suitable surfactants of formula I, according to the present invention, are Olin Corporation's POLY-TERGENT® SLF-18B nonionic surfactants, as described, for example, in WO 94/22800, published October 13, 1994 by Olin Corporation.
One preferred ether-capped poly(oxyalkylated) alcohols has the formula:
R1O[CH2CH(R3)O]x[CH2]kCH(OH)[CH2]jOR2 wherein R^ and R2 are linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radicals having from 1 to 30 carbon atoms; R3 is H, or a linear aliphatic hydrocarbon radical having from 1 to 4 carbon atoms; x is an integer having an average value from 1 to 30, wherein when x is 2 or greater R3 may be the same or different and k and j are integers having an average value of from 1 to 12, and more preferably 1 to 5.
Ri and R2 are preferably linear or branched, saturated or unsaturated, aliphatic or aromatic hydrocarbon radicals having from 6 to 22 carbon atoms with 8 to 18 carbon atoms being most preferred. H or a linear aliphatic hydrocarbon radical having from 1 to
2 carbon atoms is most preferred for R3. Preferably, x is an integer having an average value of from 1 to 20, more preferably from 6 to 15.
As described above, when, in the preferred embodiments, and x is greater than 2,
R-> may be the same or different. That is, R3 may vary between any of the alklyeneoxy units as described above. For instance, if x is 3, R^may be selected to form ethlyeneoxy(EO) or propyleneoxy(PO) and may vary in order of (EO)(PO)(EO), (EO)(EO)(PO); (EO)(EO)(EO); (PO)(EO)(PO); (PO)(PO)(EO) and (PO)(PO)(PO). Of course, the integer three is chosen for example only and the variation may be much larger with a higher integer value for x and include, for example, multiple (EO) units and a much small number of (PO) units.
Particularly preferred surfactants as described above include those that have a low cloud point of less than 20°C. These low cloud point surfactants may then be employed in conjunction with a high cloud point surfactant as described in detail below for superior grease cleaning benefits.
Most preferred ether-capped poly(oxyalkylated) alcohol surfactants are those wherein k is 1 and j is 1 so that the surfactants have the formula:
R1O[CH2CH(R3)O]xCH2CH(OH)CH2θR2 where R* , R2 and R3 are defined as above and x is an integer with an average value of from 1 to 30, preferably from 1 to 20, and even more preferably from 6 to 18. Most preferred are surfactants wherein R! and R2 range from 9 to 14, R3 is H forming ethyleneoxy and x ranges from 6 to 15.
The ether-capped poly(oxyalkylated) alcohol surfactants comprise three general components, namely a linear or branched alcohol, an alkylene oxide and an alkyl ether end cap. The alkyl ether end cap and the alcohol serve as a hydrophobic, oil-soluble portion of the molecule while the alkylene oxide group forms the hydrophilic, water- soluble portion of the molecule.
These surfactants exhibit significant improvements in spotting and filming characteristics and removal of greasy soils, when used in conjunction with high cloud point surfactants, relative to conventional surfactants.
Another suitable class of nonionic surfactants comprises sugar derived surfactants such as the polyhydroxy fatty acid amides of the formula:
O R2CNZ < wherein: R is H, Cι -C4 hydrocarbyl, 2-hydroxy ethyl, 2-hydroxy propyl, or a mixture thereof, preferably C1-C4 alkyl, more preferably C\ or C2 alkyl, most preferably C\ alkyl (i.e., methyl); and R2 is a C5-C31 hydrocarbyl, preferably straight chain C7-C19 alkyl or alkenyl, more preferably straight chain C9-C17 alkyl or alkenyl, most preferably straight chain C1 1 -C15 alkyl or alkenyl, or mixtures thereof; and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative (preferably ethoxylated or propoxylated) thereof. Z preferably will be derived from a reducing sugar in a reductive animation reaction; more preferably Z will be a glycityl. Suitable reducing sugars include glucose, fructose, maltose, lactose, galactose, mannose, and xylose. As raw materials, high dextrose corn syrup, high fructose corn syrup, and high maltose corn syrup can be utilized as well as the individual sugars listed above. These corn syrups may yield a mix of sugar components for Z. It should be understood that it is by no means intended to exclude other suitable raw materials. Z preferably will be selected from the group consisting of -CH2-(CHOH)n-CH2OH, -CH(CH2θH)-(CHOH)n_ι -
CH2OH, -CH2-(CHOH)2(CHOR')(CHOH)-CH OH, and alkoxylated derivatives thereof, where n is an integer from 3 to 5, inclusive, and R' is H or a cyclic or aliphatic monosaccharide. Most preferred are glycityls wherein n is 4, particularly -CH2-
(CHOH)4-CH2OH.
R' can be, for example, N-methyl, N-ethyl, N-propyl, N-isopropyl, N-butyl, N-2- hydroxy ethyl, or N-2-hydroxy propyl.
R2-CO-N< can be, for example, cocamide, stearamide, oleamide, lauramide, myristamide, capricamide, palmitamide, tallowamide, etc.
Z can be 1 -deoxyglucityl, 2-deoxyfructityl, 1-deoxymaltityl, 1-deoxylactityl, 1- deoxygalactityl, 1-deoxymannityl, 1-deoxymaltotriotityl, etc.
Methods for making polyhydroxy fatty acid amides are known in the art. In general, they can be made by reacting an alkyl amine with a reducing sugar in a reductive amination reaction to form a corresponding N-alkyl polyhydroxyamine, and then reacting the N-alkyl polyhydroxyamine with a fatty aliphatic ester or triglyceride in a condensation/amidation step to form the N-alkyl, N-polyhydroxy fatty acid amide product. Processes for making compositions containing polyhydroxy fatty acid amides are disclosed, for example, in G.B. Patent Specification 809,060, published February 18, 1959, by Thomas Hedley & Co., Ltd., U.S. Patent 2,965,576, issued December 20, 1960 to E. R. Wilson, and U.S. Patent 2,703,798, Anthony M. Schwartz, issued March 8, 1955, and U.S. Patent 1,985,424, issued December 25, 1934 to Piggott, each of which is incorporated herein by reference.
The preferred alkylpolyglycosides have the formula
R2θ(CnH2nO)t(glycosyl)x wherein R2 is selected from the group consisting of alkyl, alkyl-phenyl, hydroxyalkyl, hydroxyalkylphenyl, and mixtures thereof in which the alkyl groups contain from about 10 to about 18, preferably from about 12 to about 14, carbon atoms; n is 2 or 3, preferably 2; t is from 0 to about 10, preferably 0; and x is from about 1.3 to about 10, preferably from about 1.3 to about 3, most preferably from about 1.3 to about 2.7. The glycosyl is preferably derived from glucose. To prepare these compounds, the alcohol or alkylpolyethoxy alcohol is formed first and then reacted with glucose, or a source of glucose, to form the glucoside (attachment at the 1 -position). The additional glycosyl units can then be attached between their 1 -position and the preceding glycosyl units 2-, 3- , 4- and or 6-position, preferably predominantly the 2-position.
These and other nonionic surfactants are well known in the art, being described in more detail in Kirk Othmer's Encyclopedia of Chemical Technology, 3rd Ed., Vol. 22, pp. 360-379, "Surfactants and Detersive Systems", incorporated by reference herein. Further suitable nonionic detergent surfactants are generally disclosed in U.S. Patent 3,929,678, Laughlin et al., issued December 30, 1975, at column 13, line 14 through column 16, line 6, incorporated herein by reference. Cationic Surfactants -
Cationic surfactants suitable for use in the compositions of the present invention include those having a long-chain hydrocarbyl group. Examples of such cationic co- surfactants include the ammonium co-surfactants such as alkyldimethylammonium halogenides, and those co-surfactants having the formula:
[R2(OR3)y] [R4(OR3)y]2R5N+X- wherein R2 is an alkyl or alkyl benzyl group having from 8 to 18 carbon atoms in the alkyl chain, each R3 is selected from the group consisting of -CH2CH2-,
CH2CH(CH3)-, -CH2CH(CH2OH)-, -CH2CH2CH -, and mixtures thereof; each R4 is selected from the group consisting of Ci -C4 alkyl, Ci -C4 hydroxyalkyl, benzyl ring structures formed by joining the two R4 groups, -CH2CHOH- CHOHCOR6CHOHCH2OH wherein R^ is any hexose or hexose polymer having a molecular weight less than about 1000, and hydrogen when y is not 0; R^ is the same as
R4 or is an alkyl chain wherein the total number of carbon atoms of R2 plus R^ is not more than about 18; each y is from 0 to about 10 and the sum of the y values is from 0 to about 15; and X is any compatible anion.
Examples of other suitable cationic surfactants are described in following documents, all of which are incorporated by reference herein in their entirety: M.C. Publishing Co., McCutcheon's, Detergents & Emulsifiers, (North American edition 1997); Schwartz, et al., Surface Active Agents, Their Chemistry and Technology, New York: Interscience Publishers, 1949; U.S. Patent 3,155,591; U. S. Patent 3,929,678; U. S. Patent 3,959,461 U. S. Patent 4,387,090 and U.S. Patent 4,228,044.
Examples of suitable cationic surfactants are those corresponding to the general formula:
Figure imgf000022_0001
wherein R1 , R2, R3, and R4 are independently selected from an aliphatic group of from 1 to about 22 carbon atoms or an aromatic, alkoxy, polyoxyalkylene, alkylamido, hydroxyalkyl, aryl or alkylaryl group having up to about 22 carbon atoms; and X is a salt- forming anion such as those selected from halogen, (e.g. chloride, bromide), acetate, citrate, lactate, glycolate, phosphate nitrate, sulfate, and alkylsulfate radicals. The aliphatic groups can contain, in addition to carbon and hydrogen atoms, ether linkages, and other groups such as amino groups. The longer chain aliphatic groups, e.g., those of about 12 carbons, or higher, can be saturated or unsaturated. Preferred is when R\, R2,
R3, and R4 are independently selected from CI to about C22 alkyl. Especially preferred are cationic materials containing two long alkyl chains and two short alkyl chains or those containing one long alkyl chain and three short alkyl chains. The long alkyl chains in the compounds described in the previous sentence have from about 12 to about 22 carbon atoms, preferably from about 16 to about 22 carbon atoms, and the short alkyl chains in the compounds described in the previous sentence have from 1 to about 3 carbon atoms, preferably from 1 to about 2 carbon atoms.
Suitable levels of cationic detersive surfactant herein, when present, are from about 0.1% to about 20%, preferably from about 1% to about 15%, although much higher levels, e.g., up to about 30% or more, may be useful especially in nonionic : cationic (i.e., limited or anionic-free) formulations. Other Surfactants -
Amphoteric or zwitterionic detersive surfactants when present are usually useful at levels in the range from about 0.1 % to about 20% by weight of the detergent composition. Often levels will be limited to about 5% or less, especially when the amphoteric is costly.
Suitable amphoteric surfactants include the amine oxides corresponding to the formula:
R R' R" N→O wherein R is a primary alkyl group containing 6-24 carbons, preferably 10-18 carbons, and wherein R' and R" are, each, independently, an alkyl group containing 1 to 6 carbon atoms. The arrow in the formula is a conventional representation of a semi-polar bond.
Amine oxides are semi-polar surfactants and include water-soluble amine oxides containing one alkyl moiety of from about 10 to about 18 carbon atoms and 2 moieties selected from the group consisting of alkyl groups and hydroxyalkyl groups containing from about 1 to about 3 carbon atoms; water-soluble phosphine oxides containing one alkyl moiety of from about 10 to about 18 carbon atoms and 2 moieties selected from the group consisting of alkyl groups and hydroxyalkyl groups containing from about 1 to about 3 carbon atoms; and water-soluble sulfoxides containing one alkyl moiety of from about 10 to about 18 carbon atoms and a moiety selected from the group consisting of alkyl and hydroxyalkyl moieties of from about 1 to about 3 carbon atoms. Preferred amine oxide surfactants having the formula
O R3(OR4)xN(R5)2 wherein R3 is an alkyl, hydroxyalkyl, or alkyl phenyl group or mixtures thereof containing from about 8 to about 22 carbon atoms; R4 is an alkylene or hydroxyalkylene group containing from about 2 to about 3 carbon atoms or mixtures thereof; x is from 0 to about 3; and each R^ is an alkyl or hydroxyalkyl group containing from about 1 to about 3 carbon atoms or a polyethylene oxide group containing from about 1 to about 3 ethylene oxide groups. The R^ groups can be attached to each other, e.g., through an oxygen or nitrogen atom, to form a ring structure.
These amine oxide surfactants in particular include CI Q-CI g alkyl dimethyl amine oxides and Cg-Cι2 alkoxy ethyl dihydroxy ethyl amine oxides. Preferably the amine oxide is present in the composition in an effective amount, more preferably from about 0.1%) to about 20%), even more preferably about 0.1 %> to about 15%), even more preferably still from about 0.5%> to about 10%,by weight.
Some suitable zwitterionic surfactants which can be used herein comprise the betaine and betaine-like surfactants wherein the molecule contains both basic and acidic groups which form an inner salt giving the molecule both cationic and anionic hydrophilic groups over a broad range of pH values. Some common examples of these s are described in U.S. Pat. Nos. 2,082,275, 2,702,279 and 2,255,082, incorporated herein by reference. One of the preferred zwitterionic compounds have the formula
Figure imgf000024_0001
wherein Rl is an alkyl radical containing from 8 to 22 carbon atoms, R2 and R3 contain from 1 to 3 carbon atoms, R4 is an alkylene chain containing from 1 to 3 carbon atoms, X is selected from the group consisting of hydrogen and a hydroxyl radical, Y is selected from the group consisting of carboxyl and sulfonyl radicals and wherein the sum of Rl, R2 and R3 radicals is from 14 to 24 carbon atoms.
Zwitterionic surfactants, as mentioned hereinbefore, contain both a cationic group and an anionic group and are in substantial electrical neutrality where the number of anionic charges and cationic charges on the surfactant molecule are substantially the same. Zwitterionics, which typically contain both a quaternary ammonium group and an anionic group selected from sulfonate and carboxylate groups are desirable since they maintain their amphoteric character over most of the pH range of interest for cleaning hard surfaces. The sulfonate group is the preferred anionic group. Antimicrobial agents - an antimicrobial agent is a compound or substance that kills microorganisms or prevents or inhibits their growth and reproduction. A properly selected antimicrobial agent maintains stability under use and storage conditions (pH, temperature, light, etc.), for a required length of time. A desirable property of the antimicrobial agent is that it is safe and nontoxic in handling, formulation and use, is environmentally acceptable and cost effective. Classes of antimicrobial agents include, but are not limited to, chlorophenols, aldehydes, biguanides, antibiotics and biologically active salts. Some preferable antimicrobial agent in the antimicrobial is bronopol, chlorhexidine diacetate, TRICOSAN.TM., hexetidine orparachlorometaxylenol (PCMX). More preferably, the antimicrobial agent is TRICOSAN.TM, chlorhexidine diacetate or hexetidine.
The antimicrobial agent, when used, is present in a microbiocidally effective amount, more preferably an from about 0.01%> to about 10.0%>, more preferably from about 0.1%) to about 8.0%,even more preferably from about 0.5% to about 2.0%>, by weight of c the composition. Bleaching Agents
Hydrogen peroxide sources are described in detail in the herein incorporated Kirk Othmer's Encyclopedia of Chemical Technology, 4th Ed (1992, John Wiley & Sons), Vol. 4, pp. 271-300 "Bleaching Agents (Survey)", and include the various forms of sodium perborate and sodium percarbonate, including various coated and modified forms. An "effective amount" of a source of hydrogen peroxide is any amount capable of measurably improving stain removal (especially of tea stains) from soiled dishware compared to a hydrogen peroxide source-free composition when the soiled dishware is washed by the consumer in a domestic automatic dishwasher in the presence of alkali.
More generally a source of hydrogen peroxide herein is any convenient compound or mixture which under consumer use conditions provides an effective amount of hydrogen peroxide. Levels may vary widely and are usually in the range from about 0.1%) to about 70%, more typically from about 0.5%> to about 30%, by weight of the compositions herein.
The preferred source of hydrogen peroxide used herein can be any convenient source, including hydrogen peroxide itself. For example, perborate, e.g., sodium perborate (any hydrate but preferably the mono- or tetra-hydrate), sodium carbonate peroxyhydrate or equivalent percarbonate salts, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, or sodium peroxide can be used herein. Also useful are sources of available oxygen such as persulfate bleach (e.g., OXONE, manufactured by DuPont). Sodium perborate monohydrate and sodium percarbonate are particularly preferred. Mixtures of any convenient hydrogen peroxide sources can also be used.
A preferred percarbonate bleach comprises dry particles having an average particle size in the range from about 500 micrometers to about 1,000 micrometers, not more than about 10% by weight of said particles being smaller than about 200 micrometers and not more than about 10%> by weight of said particles being larger than about 1,250 micrometers. Optionally, the percarbonate can be coated with a silicate, borate or water-soluble surfactants. Percarbonate is available from various commercial sources such as FMC, Solvay and Tokai Denka.
While not preferred for the compositions of the present invention which comprise detersive enzymes, the present invention compositions may also comprise as the bleaching agent a chlorine-type bleaching material. Such agents are well known in the art, and include for example sodium dichloroisocyanurate ("NaDCC").
Organic Peroxides, especially Diacyl Peroxides
These are extensively illustrated in Kirk Othmer, Encyclopedia of Chemical Technology, Vol. 17, John Wiley and Sons, 1982 at pages 27-90 and especially at pages 63-72, all incorporated herein by reference. If a diacyl peroxide is used, it will preferably be one which exerts minimal adverse impact on spotting/filming. Preferred diacyl peroxides include dibenzoyl peroxide.
Metal-containing Bleach Catalysts
The present invention compositions and methods utilize metal-containing bleach catalysts that are effective for use in ADD compositions. Preferred are manganese and cobalt-containing bleach catalysts. One type of metal-containing bleach catalyst is a catalyst system comprising a transition metal cation of defined bleach catalytic activity, such as copper, iron, titanium, ruthenium tungsten, molybdenum, or manganese cations, an auxiliary metal cation having little or no bleach catalytic activity, such as zinc or aluminum cations, and a sequestrate having defined stability constants for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra (methylenephosphonic acid) and water-soluble salts thereof. Such catalysts are disclosed in U.S. Pat. 4,430,243.
Other types of bleach catalysts include the manganese-based complexes disclosed in U.S. Pat. 5,246,621 and U.S. Pat. 5,244,594. Preferred examples of theses catalysts include MnIV 2(u-O)3(l ,4,7-trimethyl-l ,4,7-triazacyclononane)2-(PF6)2 ("MnTACN"),
Mnm2(u-O) i (u-OAc)2( 1 ,4,7-trimethyl- 1 ,4,7-triazacyclononane)2-(Clθ4)2, MnIV4(u-
O)6( 1 ,4,7-triazacyclononane)4-(Clθ4)2, MnmMnIV4(u-O) \ (u-OAc)2( 1 ,4,7-trimethyl- l,4,7-triazacyclononane)2-(Clθ4)3, and mixtures thereof. See also European patent application publication no. 549,272. Other ligands suitable for use herein include 1,5,9- trimethyl- 1 ,5,9-triazacyclododecane, 2-methyl- 1 ,4,7-triazacyclononane, 2-methyl- 1 ,4,7- triazacyclononane, and mixtures thereof.
The bleach catalysts useful in automatic dishwashing compositions and concentrated powder detergent compositions may also be selected as appropriate for the present invention. For examples of suitable bleach catalysts see U.S. Pat. 4,246,612 and U.S. Pat. 5,227,084.
Other bleach catalysts are described, for example, in European patent application, publication no. 408,131 (cobalt complex catalysts), European patent applications, publication nos. 384,503, and 306,089 (metallo-poφhyrin catalysts), U.S. 4,728,455 (manganese/multidentate ligand catalyst), U.S. 4,711,748 and European patent application, publication no. 224,952, (absorbed manganese on aluminosilicate catalyst), U.S. 4,601,845 (aluminosilicate support with manganese and zinc or magnesium salt), U.S. 4,626,373 (manganese/ligand catalyst), U.S. 4,119,557 (ferric complex catalyst), German Pat. specification 2,054,019 (cobalt chelant catalyst) Canadian 866,191 (transition metal-containing salts), U.S. 4,430,243 (chelants with manganese cations and non-catalytic metal cations), and U.S. 4,728,455 (manganese gluconate catalysts). Preferred are cobalt catalysts which have the formula: [Co(NH3)n(M')m] Yy wherein n is an integer from 3 to 5 (preferably 4 or 5; most preferably 5); M' is a labile coordinating moiety, preferably selected from the group consisting of chlorine, bromine, hydroxide, water, and (when m is greater than 1) combinations thereof; m is an integer from 1 to 3 (preferably 1 or 2; most preferably 1); m+n = 6; and Y is an appropriately selected counteranion present in a number y, which is an integer from 1 to 3 (preferably 2 to 3; most preferably 2 when Y is a -1 charged anion), to obtain a charge- balanced salt.
The preferred cobalt catalyst of this type useful herein are cobalt pentaamine chloride salts having the formula [Co(NH3)5Cl] Yy, and especially [Co(NH3)5Cl]C_2.
More preferred are the present invention compositions which utilize cobalt (HI) bleach catalysts having the formula:
[Co(NH3)n(M)m(B)b] Ty wherein cobalt is in the +3 oxidation state; n is 4 or 5 (preferably 5); M is one or more ligands coordinated to the cobalt by one site; m is 0, 1 or 2 (preferably 1); B is a ligand coordinated to the cobalt by two sites; b is 0 or 1 (preferably 0), and when b=0, then m+n = 6, and when b=l, then m=0 and n=4; and T is one or more appropriately selected counteranions present in a number y, where y is an integer to obtain a charge-balanced salt (preferably y is 1 to 3; most preferably 2 when T is a -1 charged anion); and wherein further said catalyst has a base hydrolysis rate constant of less than 0.23 M~l s~l (25°C).
Preferred T are selected from the group consisting of chloride, iodide, I3", formate, nitrate, nitrite, sulfate, sulfite, citrate, acetate, carbonate, bromide, PFg", BF4",
B(Ph)4", phosphate, phosphite, silicate, tosylate, methanesulfonate, and combinations thereof. Optionally, T can be protonated if more than one anionic group exists in T, e.g.,
HPO42-, HCO3", H2PO4", etc. Further, T may be selected from the group consisting of non-traditional inorganic anions such as anionic surfactants (e.g., linear alkylbenzene sulfonates (LAS), alkyl sulfates (AS), alkylethoxysulfonates (AES), etc.) and/or anionic polymers (e.g., polyacrylates, polymethacrylates, etc.). The M moieties include, but are not limited to, for example, F", SO4"2, NCS",
SCN", S2θ3~2, NH3, PO43-, and carboxylates (which preferably are mono-carboxylates, but more than one carboxylate may be present in the moiety as long as the binding to the cobalt is by only one carboxylate per moiety, in which case the other carboxylate in the M moiety may be protonated or in its salt form). Optionally, M can be protonated if more than one anionic group exists in M (e.g., HPO42-, HCO3", H2PO4~,
HOC(O)CH2C(O)O-, etc.) Preferred M moieties are substituted and unsubstituted C1 -
C30 carboxylic acids having the formulas:
RC(O)O- wherein R is preferably selected from the group consisting of hydrogen and C1 -C30
(preferably Cj-Cig) unsubstituted and substituted alkyl, C6-C30 (preferably Cg-Cjg) unsubstituted and substituted aryl, and C3-C30 (preferably C5~Cι g) unsubstituted and substituted heteroaryl, wherein substituents are selected from the group consisting of - NR'3, ~NR'4+, -C(O)OR', -OR', -C(O)NR'2, wherein R' is selected from the group consisting of hydrogen and Ci -Cg moieties. Such substituted R therefore include the moieties -(CH2)nOH and -(CH2)nNR'4+, wherein n is an integer from 1 to about 16, preferably from about 2 to about 10, and most preferably from about 2 to about 5.
Most preferred M are carboxylic acids having the formula above wherein R is selected from the group consisting of hydrogen, methyl, ethyl, propyl, straight or branched C4~Cι2 alkyl, and benzyl. Most preferred R is methyl. Preferred carboxylic acid M moieties include formic, benzoic, octanoic, nonanoic, decanoic, dodecanoic, malonic, maleic, succinic, adipic, phthalic, 2-ethylhexanoic, naphthenoic, oleic, palmitic, triflate, tartrate, stearic, butyric, citric, acrylic, aspartic, fumaric, lauric, linoleic, lactic, malic, and especially acetic acid.
The B moieties include carbonate, di- and higher carboxylates (e.g., oxalate, malonate, malic, succinate, maleate), picolinic acid, and alpha and beta amino acids (e.g., glycine, alanine, beta-alanine, phenylalanine).
Cobalt bleach catalysts useful herein are known, being described for example along with their base hydrolysis rates, in M. L. Tobe, "Base Hydrolysis of Transition- Metal Complexes", Adv. Inorg. Bioinorg. Mech., (1983), 2, pages 1-94. For example, Table 1 at page 17, provides the base hydrolysis rates (designated therein as køH) f°r cobalt pentaamine catalysts complexed with oxalate (koH= 2.5 x 10~4 M~l s~l (25°C)), NCS- (k0H= 5.0 x 10-4 M"1 s" 1 (25°C)), formate (k0H= 5.8 x 10"4 M"1 s" 1 (25°C)), and acetate (kQLP" 9-6 x 10"4 M~l s~l (25°C)). The most preferred cobalt catalyst useful herein are cobalt pentaamine acetate salts having the formula [Co(NH3)5OAc] Ty, wherein OAc represents an acetate moiety, and especially cobalt pentaamine acetate chloride, [Co(NH3)5OAc]Cl2; as well as [Co(NH3)5OAc](OAc)2;
[Co(NH3)5OAc](PF6)2; [Co(NH3)5OAc](SO4); [Co(NH3)5OAc](BF4)2; and
[Co(NH3)5OAc](NO3)2.
Cobalt catalysts according to the present invention made be produced according to the synthetic routes disclosed in U.S. Patent Nos. 5,559,261, 5,581,005, and 5,597,936, the disclosures of which are herein incorporated by reference.
These catalysts may be coprocessed with adjunct materials so as to reduce the color impact if desired for the aesthetics of the product, or to be included in enzyme- containing particles as exemplified hereinafter, or the compositions may be manufactured to contain catalyst "speckles".
As a practical matter, and not by way of limitation, the cleaning compositions and cleaning processes herein can be adjusted to provide on the order of at least one part per hundred million of the active bleach catalyst species in the aqueous washing medium, and will preferably provide from about 0.01 ppm to about 25 ppm, more preferably from about 0.05 ppm to about 10 ppm, and most preferably from about 0.1 ppm to about 5 ppm, of the bleach catalyst species in the wash liquor. In order to obtain such levels in the wash liquor of an automatic dishwashing process, typical automatic dishwashing compositions herein will comprise from about 0.0005%> to about 0.2%>, more preferably from about 0.004%> to about 0.08%>, of bleach catalyst by weight of the cleaning compositions. Preferred bleach catalysts, along with methods of there use can be additionally found in U.S. Patents 5,705,464, 5,804,542, 5,798,326, 5,703,030 and 5,599,781, all of which are incoφorated herein by reference.
Bleach Activators
Preferably, when composition contains a peroxygen bleach component the composition is formulated with an activator (peracid precursor). Preferred activators are selected from the group consisting of tetraacetyl ethylene diamine (TAED), benzoylcaprolactam (BzCL), 4-nitrobenzoylcaprolactam, 3-chlorobenzoylcaprolactam, benzoyloxybenzenesulphonate (BOBS), nonanoyloxybenzenesulphonate (NOBS), phenyl benzoate (PhBz), decanoyloxybenzenesulphonate (CI Q-OBS), benzoylvalerolactam
(BZVL), octanoyloxybenzenesulphonate (Cg-OBS), perhydrolyzable esters and mixtures thereof, most preferably benzoylcaprolactam and benzoylvalerolactam. Particularly preferred bleach activators in the pH range from about 8 to about 9.5 are those selected having an OBS or VL leaving group.
Preferred bleach activators are those described in U.S. Patent 5,130,045, Mitchell et al, and 4,412,934, Chung et al, and copending patent applications U. S. Serial Nos. 08/064,624, 08/064,623, 08/064,621, 08/064,562, 08/064,564, 08/082,270 and copending application to M. Burns, A. D. Willey, R. T. Hartshorn, C. K. Ghosh, entitled "Bleaching Compounds Comprising Peroxyacid Activators Used With Enzymes" and having U.S. Serial No. 08/133,691 (P&G Case 4890R), all of which are incoφorated herein by reference.
The mole ratio of peroxygen bleaching compound (as AvO) to bleach activator in the present invention generally ranges from at least 1:1, preferably from about 20:1 to about 1 :1, more preferably from about 10:1 to about 3:1.
Quaternary substituted bleach activators may also be included. The present detergent compositions preferably comprise a quaternary substituted bleach activator (QSBA) or a quaternary substituted peracid (QSP); more preferably, the former. Preferred QSBA structures are further described in copending U.S. Serial No. 08/298,903, 08/298,650, 08/298,906 and 08/298,904 filed August 31, 1994, incoφorated herein by reference. Levels of bleach activators herein may vary widely, e.g., from about 0.01%> to about 90%), by weight of the composition, although lower levels, e.g., more preferably from about 0.1%) to about 30%, even more preferably from about 0.1% to about 20%>, even more preferably from about 0.5%> to about 10%>, even more still preferably from about 1%) to about 8%, by weight of the composition are more typically used.
Preferred hydrophilic bleach activators include N,N,N'N'-tetraacetyl ethylene diamine (TAED) or any of its close relatives including the triacetyl or other unsymmetrical derivatives. TAED and the acetylated carbohydrates such as glucose pentaacetate and tetraacetyl xylose are preferred hydrophilic bleach activators. Depending on the application, acetyl triethyl citrate, a liquid, also has some utility, as does phenyl benzoate.
Preferred hydrophobic bleach activators include substituted amide types described in detail hereinafter, such as activators related to NAPAA, and activators related to certain imidoperacid bleaches, for example as described in U.S. Patent 5,061,807, issued October 29, 1991 and assigned to Hoechst Aktiengesellschaft of Frankfurt, Germany.
Other suitable bleach activators include sodium-4-benzoyloxy benzene sulfonate (SBOBS); sodium- l-methyl-2-benzoyloxy benzene-4-sulphonate; sodium-4-methyl-3- benzoyloxy benzoate (SPCC); trimethyl ammonium toluyloxy-benzene sulfonate; or sodium 3, 5, 5 -trimethyl hexanoyloxybenzene sulfonate (STHOBS).
Bleach activators may be used in any amount, typically up to 20%, preferably from 0.1-10% by weight, of the composition, though higher levels, 40%> or more, are acceptable, for example in highly concentrated bleach additive product forms or forms intended for appliance automated dosing.
Highly preferred bleach activators useful herein are amide-substituted and have either of the formulae:
O O O O
II II II II R1-C-N— R2-C— L, R1— N I — C— R2-C— L
R5 R5
or mixtures thereof, wherein R is alkyl, aryl, or alkaryl containing from about 1 to about 14 carbon atoms including both hydrophilic types (short Rl) and hydrophobic types (Rl is especially from 6, preferably about 8, to about 12), R 2 i •s alkylene, arylene or alkaryl ene containing from about 1 to about 14 carbon atoms, R is H, or an alkyl, aryl, or alkaryl containing from about 1 to about 10 carbon atoms, and L is a leaving group which is herein before defined.
Preferred bleach activators also include those of the above general formula wherein L is selected from the group consisting of:
Figure imgf000033_0001
3 - + - + wherein R is as defined above and Y is -SO3 M or -CO2 M wherein M is as defined above.
Preferred examples of bleach activators of the above formulae include:
(6-octanamidocaproyl)oxybenzenesulfonate,
(6-nonanamidocaproyl)oxybenzenesulfonate,
(6-decanamidocaproyl)oxybenzenesulfonate, and mixtures thereof.
Other useful activators, disclosed in U.S. 4,966,723, are benzoxazin-type, such as a C6H4 ring to which is fused in the 1,2-positions a moiety --C(O)OC(R1)=N-. A highly preferred activator of the benzoxazin-type is:
Figure imgf000033_0002
Acyl lactam activators are very useful herein, especially the acyl caprolactams (see for example WO 94-28102 A) and acyl valerolactams (see U.S. 5,503,639) of the formulae:
Figure imgf000033_0003
wherein R6 is H, alkyl, aryl, alkoxyaryl, an alkaryl group containing from 1 to about 12 carbon atoms, or substituted phenyl containing from about 6 to about 18 carbons. See also U.S. 4,545,784 which discloses acyl caprolactams, including benzoyl caprolactam adsorbed into sodium perborate.
Nonlimiting examples of additional activators useful herein are to be found in U.S. 4,915,854, U.S. 4,412,934 and 4,634,551.
Additional activators useful herein include those of U.S. 5,545,349. Examples include esters of an organic acid and ethylene glycol, di ethylene glycol or glycerin, or the acid imide of an organic acid and ethylenediamine; wherein the organic acid is selected from methoxyacetic acid, 2-methoxypropionic acid, p-methoxybenzoic acid, ethoxyacetic acid, 2-ethoxypropionic acid, p-ethoxybenzoic acid, propoxyacetic acid, 2- propoxypropionic acid, p-propoxybenzoic acid, butoxyacetic acid, 2-butoxypropionic acid, p-butoxybenzoic acid, 2-methoxyethoxyacetic acid,2-methoxy-l- methylethoxyacetic acid, 2-methoxy-2-met__ylethoxyacetic acid, 2-ethoxyethoxyacetic acid, 2-(2-ethoxyethoxy)propionic acid, p-(2-ethoxyethoxy)benzoic acid, 2-ethoxy-l- methylethoxyacetic acid, 2-ethoxy-2-methylethoxyacetic acid, 2-propoxyethoxyacetic acid, 2-propoxy-l-methylethoxyaceticacid, 2-propoxy-2-methylethoxyacetic acid, 2- butoxyethoxyacetic acid ,2-butoxy-l -methylethoxyacetic acid, 2-butoxy-2- methylethoxyacetic acid, 2-(2-methoxyethoxy)ethoxyacetic acid, 2-(2-methoxy-l- methylethoxy)ethoxyacetic acid, 2-(2-methoxy-2-methylethoxy)ethoxyacetic acid and 2-(2-ethoxyethoxy)ethoxyacetic acid.
Useful herein as oxygen bleaches are the inorganic peroxides such as Na2O2, superoxides such as KO2, organic hydroperoxides such as cumene hydroperoxide and t- butyl hydroperoxide, and the inorganic peroxoacids and their salts such as the peroxosulfuric acid salts, especially the potassium salts of peroxodisulfuric acid and, more preferably, of peroxomonosulfuric acid including the commercial triple-salt form sold as OXONE by DuPont and also any equivalent commercially available forms such as CUROX from Akzo or CAROAT from Degussa. Certain organic peroxides, such as dibenzoyl peroxide, may be useful, especially as additives rather than as primary oxygen bleach. Mixed oxygen bleach systems are generally useful, as are mixtures of any oxygen bleaches with the known bleach activators, organic catalysts, enzymatic catalysts and mixtures thereof; moreover such mixtures may further include brighteners, photobleaches and dye transfer inhibitors of types well-known in the art.
Other useful peracids and bleach activators herein are in the family of imidoperacids and imido bleach activators. These include phthaloylimidoperoxycaproic acid and related arylimido-substituted and acyloxynitrogen derivatives. For listings of such compounds, preparations and their incoφoration into laundry compositions including both granules and liquids, See U.S. 5,487,818; U.S. 5,470,988, U.S. 5,466,825; U.S. 5,419,846; U.S. 5,415,796; U.S. 5,391,324; U.S. 5,328,634; U.S. 5,310,934; U.S. 5,279,757; U.S. 5,246,620; U.S. 5,245,075; U.S. 5,294,362; U.S. 5,423,998; U.S. 5,208,340; U.S. 5,132,431 and U.S. 5,087385.
Additional bleach activators are those described in U.S. Patent 5,130,045, Mitchell et al, and 4,412,934, Chung et al, and copending patent applications U. S. Serial Nos. 08/064,624, 08/064,623, 08/064,621, 08/064,562, 08/064,564, 08/082,270 and copending application to M. Burns, A. D. Willey, R. T. Hartshorn, C. K. Ghosh, entitled "Bleaching Compounds Comprising Peroxyacid Activators Used With Enzymes" and having U.S. Serial No. 08/133,691 (P&G Case 4890R), all of which are incoφorated herein by reference.
Quaternary substituted bleach activators may also be included. The present detergent compositions preferably comprise a quaternary substituted bleach activator (QSBA) or a quaternary substituted peracid (QSP); more preferably, the former. Preferred QSBA structures are further described in copending U.S. Patent Nos. 5,460,747, 5,584,888 and 5,578,136, incoφorated herein by reference.
Useful diperoxyacids include, for example, 1,12-diperoxydodecanedioic acid (DPDA); 1,9-diperoxyazelaic acid; diperoxybrassilic acid; diperoxysebasic acid and diperoxyisophthalic acid; 2-decyldiperoxybutane-l,4-dioic acid; and 4,4'- sulphonylbisperoxybenzoic acid. Owing to structures in which two relatively hydrophilic groups are disposed at the ends of the molecule, diperoxyacids have sometimes been classified separately from the hydrophilic and hydrophobic monoperacids, for example as "hydro tropic". Some of the diperacids are hydrophobic in a quite literal sense, especially when they have a long-chain moiety separating the peroxyacid moieties.
It is stressed that if any bleach activators are used then they are limited to ones which cause minimal, preferably no damage to the rubber components in a domestic bleaching process. Reducing Bleaches
Another class of useful bleaches are the so called reducing bleaches. These are reductants which "reduce", in the electrochemical sense, instead of oxidize as conventional bleaches do. Examples of suitable reducing bleaches can be found in These are extensively illustrated in Kirk Othmer, Encyclopedia of Chemical Technology, Vol. 17, John Wiley and Sons, 1982. Enzymatic sources of hydrogen peroxide
On a different track from the oxygen bleaching agents illustrated hereinabove, another suitable hydrogen peroxide generating system is a combination of a Ci -C4 alkanol oxidase and a Ci -C4 alkanol, especially a combination of methanol oxidase (MOX) and ethanol. Such combinations are disclosed in WO 94/03003. Other enzymatic materials related to bleaching, such as peroxidases, haloperoxidases, oxidases, superoxide dismutases, catalases and their enhancers or, more commonly, inhibitors, may be used as optional ingredients in the instant compositions. Oxygen transfer agents and precursors
Also useful herein are any of the known organic bleach catalysts, oxygen transfer agents or precursors therefor. These include the compounds themselves and/or their precursors, for example any suitable ketone for production of dioxiranes and/or any of the hetero-atom containing analogs of dioxirane precursors or dioxiranes, such as sulfonimines RlR2c=NSO2R3, see EP 446 982 A, published 1991 and sulfonyloxaziridines, for example:
R R C— NSO2R see EP 446,981 A, published 1991. Preferred examples of such materials include hydrophilic or hydrophobic ketones, used especially in conjunction with monoperoxysulfates to produce dioxiranes in situ, and/or the imines described in U.S. 5,576,282 and references described therein. Oxygen bleaches preferably used in conjunction with such oxygen transfer agents or precursors include percarboxylic acids and salts, percarbonic acids and salts, peroxymonosulfuric acid and salts, and mixtures thereof. See also U.S. 5,360,568; U.S. 5,360,569; and U.S. 5,370,826. In a highly preferred embodiment, the invention relates to a detergent composition which incoφorates a transition-metal bleach catalyst in accordance with the invention, and organic bleach catalyst such as one named hereinabove, a primary oxidant such as a hydrogen peroxide source, a hydrophilic bleach activator, and at least one additional detergent, hard-surface cleaner or automatic dishwashing adjunct. Preferred among such compositions are those which further include a precursor for a hydrophobic oxygen bleach such. Composition pH
Compositions of the invention will have a pH range of from about 2 to about 13, preferably, pH is alkaline, more preferably from about 7 to about 12.5, more preferably from about 8 to about 12, even more preferably from about 9 to about 11.5. If a composition with a pH greater than 7 is to be more effective, it preferably should contain a buffering agent capable of providing a generally more alkaline pH in the composition and in dilute solutions, i.e., about 0.1 % to 0.4% by weight aqueous solution, of the composition. The pKa value of this buffering agent should be about 0.5 to 1.0 pH units below the desired pH value of the composition (determined as described above). Preferably, the pKa of the buffering agent should be from about 7 to about 10. Under these conditions the buffering agent most effectively controls the pH while using the least amount thereof.
The buffering agent may be an active detergent in its own right, or it may be a low molecular weight, organic or inorganic material that is used in this composition solely for maintaining an alkaline pH. Preferred buffering agents for compositions of this invention are nitrogen-containing materials. Some examples are amino acids such as lysine or lower alcohol amines like mono-, di-, and tri-ethanolamine. Other preferred nitrogen-containing buffering agents are Tri(hydroxymethyl)amino methane (HOCH2)3CNH3 (TRIS), 2-amino-2-ethyl-l,3-propanediol, 2-amino-2-methyl-propanol, 2-amino-2-methyl-l,3-propanol, disodium glutamate, N-methyl diethanolamide, 1,3- diamino-propanol N,N'-tetra-methyl- 1 ,3-diamino-2-propanol, N,N-bis(2- hydroxyethyl)glycine (bicine) and N-tris (hydroxymethyl)methyl glycine (tricine). Mixtures of any of the above are also acceptable. Useful inorganic buffers/alkalinity sources include the alkali metal carbonates and alkali metal phosphates, e.g., sodium carbonate, sodium polyphosphate. For additional buffers see McCutcheon's EMULSFFIERS AND DETERGENTS, North American Edition, 1997, McCutcheon Division, MC Publishing Company Kirk and WO 95/07971 both of which are incoφorated herein by reference.
The buffering agent, if used, is present in the compositions of the invention herein at a level of from about 0.1 % to 15%>, preferably from about 1%> to 10%>, most preferably from about 2% to 8%>, by weight of the composition.
Diamines -It is preferred that the diamines used in the present invention are substantially free from impurities. That is, by "substantially free" it is meant that the diamines are over 95%> pure, i.e., preferably 97%, more preferably 99%, still more preferably 99.5%, free of impurities. Examples of impurities which may be present in commercially supplied diamines include 2-Methyl-l,3-diaminobutane and alkylhydropyrimidine. Further, it is believed that the diamines should be free of oxidation reactants to avoid diamine degradation and ammonia formation.
It is further preferred that the compositions of the present invention be "malodor" free. That is, that the odor of the headspace does not generate a negative olfactory response from the consumer. This can be achieved in many ways, including the use of perfumes to mask any undesirable odors, the use of stabilizers, such as antioxidants, chelants etc., and or the use of diamines which are substantially free of impurities. It is believed, without wanting to being limited by theory, that it is the impurities present in the diamines that are the cause of most of the malodors in the compositions of the present invention. These impurities can form during the preparation and storage of the diamines. They can also form during the preparation and storage of the inventive composition. The use of stabilizers such as antioxidants and chelants inhibit and/or prevent the formation of these impurities in the composition from the time of preparation to ultimate use by the consumer and beyond. Hence, it is most preferred to remove, suppress and/or prevent the formation of these malodors by the addition of perfumes, stabilizers and/or the use of diamines which are substantially free from impurities.
Preferred organic diamines are those in'which pKl and pK2 are in the range of about 8.0 to about 11.5, preferably in the range of about 8.4 to about 11, even more preferably from about 8.6 to about 10.75. Preferred materials for performance and supply considerations are l,3-bis(methylamine)-cyclohexane, 1,3 propane diamine (pKl=10.5; pK2-S.8), 1,6 hexane diamine (pKl=l l; pK2=10), 1,3 pentane diamine (Dytek EP) (pKl=10.5; pK2=8.9), 2-methyl 1,5 pentane diamine (Dytek A) (pKl=11.2; pK2=10.0). Other preferred materials are the primary/primary diamines with alkylene spacers ranging from C4 to C8. In general, it is believed that primary diamines are preferred over secondary and tertiary diamines.
Definition of pKl and pK2 - As used herein, "pKal" and "pKa2" are quantities of a type collectively known to those skilled in the art as "pKa" pKa is used herein in the same manner as is commonly known to people skilled in the art of chemistry. Values referenced herein can be obtained from literature, such as from "Critical Stability Constants: Volume 2, Amines" by Smith and Martel, Plenum Press, NY and London, 1975. Additional information on pKa's can be obtained from relevant company literature, such as information supplied by Dupont, a supplier of diamines.
As a working definition herein, the pKa of the diamines is specified in an all- aqueous solution at 25°C and for an ionic strength between 0.1 to 0.5 M. The pKa is an equilibrium constant which can change with temperature and ionic strength; thus, values reported in the literature are sometimes not in agreement depending on the measurement method and conditions. To eliminate ambiguity, the relevant conditions and/or references used for pKa's of this invention are as defined herein or in "Critical Stability Constants: Volume 2, Amines". One typical method of measurement is the potentiometric titration of the acid with sodium hydroxide and determination of the pKa by suitable methods as described and referenced in "The Chemist's Ready Reference Handbook" by Shugar and Dean, McGraw Hill, NY, 1990. It has been determined that substituents and structural modifications that lower pKl and pK2 to below about 8.0 are undesirable and cause losses in performance. This can include substitutions that lead to ethoxylated diamines, hydroxy ethyl substituted diamines, diamines with oxygen in the beta (and less so gamma) position to the nitrogen in the spacer group (e.g., Jeffamine EDR 148). In addition, materials based on ethylene diamine are unsuitable.
The diamines useful herein can be defined by the following structure:
R2\ Cx^ . _.CV R4
N A N R3 R5 . wherein R2_5 are independently selected from H, methyl, -CH3CH2, and ethylene oxides; Cx and Cv are independently selected from methylene groups or branched alkyl groups where x+y is from about 3 to about 6; and A is optionally present and is selected from electron donating or withdrawing moieties chosen to adjust the diamine pKa's to the desired range. If A is present, then x and y must both be 1 or greater.
Alternatively the preferred diamines can be those with a molecular weight less than or equal to 400 g/mol. It is preferred that these diamines have the formula:
Figure imgf000040_0001
wherein each R6 is independently selected from the group consisting of hydrogen, Ci -C4 linear or branched alkyl, alkyleneoxy having the formula:
Figure imgf000040_0002
wherein R^ is C2-C4 linear or branched alkylene, and mixtures thereof; R° is hydrogen, Ci -C4 alkyl, and mixtures thereof; m is from 1 to about 10; X is a unit selected from: i) C3-C10 linear alkylene, C3-C10 branched alkylene, C3-C10 cyclic alkylene, C3-C10 branched cyclic alkylene, an alkyleneoxyalkylene having the formula:
Figure imgf000041_0001
wherein R ' and m are the same as defined herein above; ii) C3-C10 linear, C3-C10 branched linear, C3-C10 cyclic, C3-C1 Q branched cyclic alkylene, Cg-Cj Q arylene, wherein said unit comprises one or more electron donating or electron withdrawing moieties which provide said diamine with a pKa greater than about 8; and iii) mixtures of (i) and (ii) provided said diamine has a pKa of at least about 8.
Examples of preferred diamines include the following:
^NΓ ^^ ^NH2 Dimethyl aminopropyl amine: '
H2N
1,6-Hexane Diamine:
1,3 propane diamine -
2-methyl 1,5 pentane diamine -
Figure imgf000041_0002
1,3-pentanediamine, available under the tradename Dytek EP
Figure imgf000041_0003
H2N \ _^-\ __-NH2
1-methyl-diaminopropane -
Jeffamine EDR 148 - Isophorone diamine
Figure imgf000042_0001
Figure imgf000042_0002
1 ,3-bis(methylamine)-cyclohexane ; and mixtures thereof.
Solvents.
Optionally, the compositions of the present invention may further comprise one or more solvents. These solvents may be used in conjunction with an aqueous liquid carrier or they may be used without any aqueous liquid carrier being present. Solvents are broadly defined as compounds that are liquid at temperatures of 20°C-25°C and which are not considered to be surfactants. One of the distinguishing features is that solvents tend to exist as discrete entities rather than as broad mixtures of compounds. Some solvents which are useful in the hard surface cleaning compositions of the present invention contain from 1 carbon atom to 35 carbon atoms, and contain contiguous linear, branched or cyclic hydrocarbon moieties of no more than 8 carbon atoms. Examples of suitable solvents for the present invention include, methanol, ethanol, propanol, isopropanol, 2-methyl pyrrolidinone, benzyl alcohol and moφholine n-oxide. Preferred among these solvents are methanol and isopropanol.
The compositions used herein may optionally contain an alcohol having a hydrocarbon chain comprising 8 to 18 carbon atoms, preferably 12 to 16. The hydrocarbon chain can be branched or linear, and can be mono, di or polyalcohols. The compositions used herein can optionally comprise from 0.1 %> to 3%> by weight of the total composition of such alcohol, or mixtures thereof, preferably from 0.1%) to 1%>.
The solvents which can be used herein include all those known to the those skilled in the art of hard-surfaces cleaner compositions. Suitable solvents for use herein include ethers and di ethers having from 4 to 14 carbon atoms, preferably from 6 to 12 carbon atoms, and more preferably from 8 to 10 carbon atoms. Also other suitable solvents are glycols or alkoxylated glycols, alkoxylated aromatic alcohols, aromatic alcohols, aliphatic branched alcohols, alkoxylated aliphatic branched alcohols, alkoxylated linear C1-C5 alcohols, linear C1-C5 alcohols, C8-C14 alkyl and cycloalkyl hydrocarbons and halohydrocarbons, C6-C16 glycol ethers and mixtures thereof.
Suitable glycols which can be used herein are according to the formula HO- CR1R2-OH wherein Rl and R2 are independently H or a C2-C10 saturated or unsaturated aliphatic hydrocarbon chain and/or cyclic. Suitable glycols to be used herein are dodecaneglycol and/or propanediol.
Suitable alkoxylated glycols which can be used herein are according to the formula R-(A)n-Rl-OH wherein R is H, OH, a linear saturated or unsaturated alkyl of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 2 to 10, wherein Rl is H or a linear saturated or unsaturated alkyl of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 2 to 10, and A is an alkoxy group preferably ethoxy, methoxy, and/or propoxy and n is from 1 to 5, preferably 1 to 2. Suitable alkoxylated glycols to be used herein are methoxy octadecanol and/or ethoxyethoxyethanol .
Suitable alkoxylated aromatic alcohols which can be used herein are according to the formula R (A)n-OH wherein R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 2 to 10, wherein A is an alkoxy group preferably butoxy, propoxy and or ethoxy, and n is an integer of from 1 to 5, preferably 1 to 2. Suitable alkoxylated aromatic alcohols are benzoxyethanol and/or benzoxypropanol.
Suitable aromatic alcohols which can be used herein are according to the formula R-OH wherein R is an alkyl substituted or non-alkyl substituted aryl group of from 1 to 20 carbon atoms, preferably from 1 to 15 and more preferably from 1 to 10. For example a suitable aromatic alcohol to be used herein is benzyl alcohol.
Suitable aliphatic branched alcohols which can be used herein are according to the formula R-OH wherein R is a branched saturated or unsaturated alkyl group of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 5 to 12. Particularly suitable aliphatic branched alcohols to be used herein include 2-ethylbutanol and/or 2-methylbutanol.
Suitable alkoxylated aliphatic branched alcohols which can be used herein are according to the formula R (A)n-OH wherein R is a branched saturated or unsaturated alkyl group of from 1 to 20 carbon atoms, preferably from 2 to 15 and more preferably from 5 to 12, wherein A is an alkoxy group preferably butoxy, propoxy and/or ethoxy, and n is an integer of from 1 to 5, preferably 1 to 2. Suitable alkoxylated aliphatic branched alcohols include 1-methylpropoxyethanol and/or 2-methylbutoxyethanol.
Suitable alkoxylated linear C1-C5 alcohols which can be used herein are according to the formula R (A)n-OH wherein R is a linear saturated or unsaturated alkyl group of from 1 to 5 carbon atoms, preferably from 2 to 4, wherein A is an alkoxy group preferably butoxy, propoxy and/or ethoxy, and n is an integer of from 1 to 5, preferably 1 to 2. Suitable alkoxylated aliphatic linear C1-C5 alcohols are butoxy propoxy propanol (n-BPP), butoxyethanol, butoxypropanol, ethoxyethanol or mixtures thereof. Butoxy propoxy propanol is commercially available under the trade name n-BPP® from Dow chemical.
Suitable linear C1-C5 alcohols which can be used herein are according to the formula R-OH wherein R is a linear saturated or unsaturated alkyl group of from 1 to 5 carbon atoms, preferably from 2 to 4. Suitable linear C1-C5 alcohols are methanol, ethanol, propanol or mixtures thereof.
Other suitable solvents include, but are not limited to, butyl diglycol ether (BDGE), butyltriglycol ether, ter amilic alcohol and the like. Particularly preferred solvents which can be used herein are butoxy propoxy propanol, butyl diglycol ether, benzyl alcohol, butoxypropanol, ethanol, methanol, isopropanol and mixtures thereof.
Typically, the compositions used in the methods of the present invention preferably comprise up to 20%> by weight of the total composition of a solvent or mixtures thereof, more preferably from 0.5%o to 10%>, even more preferably from 3%> to 10%. and even more preferably still from 1% to 8%>, by weight.
Other suitable solvents for use herein include propylene glycol derivatives such as n-butoxypropanol or n- butoxypropoxypropanol, water-soluble CARBITOL R solvents or water-soluble CELLOSOLVE R solvents; water-soluble CARBITOL R solvents are compounds of the 2-(2-alkoxyethoxy)ethanol class wherein the alkoxy group is derived from ethyl, propyl or butyl; a preferred water-soluble carbitol is 2-(2- butoxyethoxy)ethanol also known as butyl carbitol. Water-soluble CELLOSOLVE R solvents are compounds of the 2-alkoxyethoxy ethanol class, with 2-butoxyethoxyethanol being preferred. Other suitable solvents include benzyl alcohol, and diols such as 2- ethyl-1, 3-hexanediol and 2,2,4-trimethyl-l,3-pentanediol and mixtures thereof. Some preferred solvents for use herein are n-butoxypropoxypropanol, BUTYL CARBITOL ® and mixtures thereof.
The solvents can also be selected from the group of compounds comprising ether derivatives of mono-, di- and tri-ethylene glycol, propylene glycol, butylene glycol ethers, and mixtures thereof. The molecular weights of these solvents are preferably less than 350, more preferably between 100 and 300, even more preferably between 115 and 250. Examples of preferred solvents include, for example, mono-ethylene glycol n-hexyl ether, mono-propylene glycol n-butyl ether, and tri-propylene glycol methyl ether. Ethylene glycol and propylene glycol ethers are commercially available from the Dow Chemical Company under the tradename "Dowanol" and from the Arco Chemical Company under the tradename "Arcosolv". Other preferred solvents including mono- and di-ethylene glycol «-hexyl ether are available from the Union Carbide company. Hydrophobic Solvent
In order to improve cleaning in liquid compositions, one can use a hydrophobic solvent that has cleaning activity. The hydrophobic solvents which may be employed in the hard surface cleaning compositions herein can be any of the well-known "degreasing" solvents commonly used in, for example, the dry cleaning industry, in the hard surface cleaner industry and the metalworking industry.
A useful definition of such solvents can be derived from the solubility parameters as set forth in "The Hoy," a publication of Union Carbide, incoφorated herein by reference. The most useful parameter appears to be the hydrogen bonding parameter which is calculated by the formula: 1/2 α- γH = γT α
wherein γH is the hydrogen bonding parameter, a is the aggregation number,
(Log α = 3.39066 T /T - 0.15848 - LogM), and b c
γT is the solubility parameter which is obtained from the formula:
Figure imgf000046_0001
where ΔH25 is the heat of vaporization at 25°C, R is the gas constant (1.987 cal/mole/deg), T is the absolute temperature in °K, Ttø is the boiling point in °K, Tc is the critical temperature in °K, d is the density in g/ml, and M is the molecular weight.
For the compositions herein, hydrogen bonding parameters are preferably less than 7.7, more preferably from 2 to 7, or 7.7, and even more preferably from 3 to 6. Solvents with lower numbers become increasingly difficult to solubilize in the compositions and have a greater tendency to cause a haze on glass. Higher numbers require more solvent to provide good greasy/oily soil cleaning.
Hydrophobic solvents are typically used, when present, at a level of from 0.5%> to 30%), preferably from 2%> to 15%>, more preferably from 3%> to 8%. Dilute compositions typically have solvents at a level of from 1% to 10%), preferably from 3% to 6%>. Concentrated compositions contain from 10% to 30%>, preferably from 10% to 20% of solvent.
Many of such solvents comprise hydrocarbon or halogenated hydrocarbon moieties of the alkyl or cycloalkyl type, and have a boiling point well above room temperature, i.e., above 20°C.
One highly preferred solvent is limonene, which not only has good grease removal but also a pleasant odor properties.
The formulator of compositions of the present type will be guided in the selection of solvent partly by the need to provide good grease-cutting properties, and partly by aesthetic considerations. For example, kerosene hydrocarbons function quite well for grease cutting in the present compositions, but can be malodorous. Kerosene must be exceptionally clean before it can be used, even in commercial situations. For home use, where malodors would not be tolerated, the formulator would be more likely to select solvents which have a relatively pleasant odor, or odors which can be reasonably modified by perfuming.
The C5-C9 alkyl aromatic solvents, especially the C5-C9 alkyl benzenes, preferably octyl benzene, exhibit excellent grease removal properties and have a low, pleasant odor. Likewise, the olefin solvents having a boiling point of at least 100°C, especially alpha-olefins, preferably 1-decene or 1-dodecene, are excellent grease removal solvents.
Genetically, glycol ethers useful herein have the formula RU O-(Rl2θ-)mlH wherein each RU is an alkyl group which contains from 3 to 8 carbon atoms, each Rl2 is either ethylene or propylene, and m' is a number from 1 to 3. The most preferred glycol ethers are selected from the group consisting of monopropyleneglycolmonopropyl ether, dipropyleneglycolmonobutyl ether, monopropyleneglycolmonobutyl ether, ethyleneglycolmonohexyl ether, ethyleneglycolmonobutyl ether, diethyleneglycolmonohexyl ether, monoethyleneglycolmonohexyl ether, monoethyleneglycolmonobutyl ether, and mixtures thereof.
A particularly preferred type of solvent for these hard surface cleaner compositions comprises diols having from 6 to 16 carbon atoms in their molecular structure. Preferred diol solvents have a solubility in water of from 0.1 to 20 g/100 g of water at 20°C. The diol solvents in addition to good grease cutting ability, impart to the compositions an enhanced ability to remove calcium soap soils from surfaces such as bathtub and shower stall walls. These soils are particularly difficult to remove, especially for compositions which do not contain an abrasive. Other solvents such as benzyl alcohol, n-hexanol, and phthalic acid esters of C 1.4 alcohols can also be used.
Solvents such as pine oil, orange teφene, benzyl alcohol, n-hexanol, phthalic acid esters of Cι _4 alcohols, butoxy propanol, Butyl Carbitol® and l(2-n-butoxy-l- methylethoxy)propane-2-ol (also called butoxy propoxy propanol or dipropylene glycol monobutyl ether), hexyl diglycol (Hexyl Carbitol®), butyl triglycol, diols such as 2,2,4- trimethyl- 1,3-pentanediol, and mixtures thereof, can be used. The butoxy-propanol solvent should have no more than 20%>, preferably no more than 10%, more preferably no more than 7%, of the secondary isomer in which the butoxy group is attached to the secondary atom of the propanol for improved odor.
The level of hydrophobic solvent is preferably, when present, from 1%> to 15%, more preferably from 2%> to 12%o, even more preferably from 5% to 10%>. Hydrotropes
The compositions used in the methods of the present invention may optionally comprise one or more materials which are hydrotropes. Hydrotropes suitable for use in the compositions herein include the C1 -C3 alkyl aryl sulfonates, Cg-Cι2 alkanols, Cι~
C carboxylic sulfates and sulfonates, urea, Ci -Cβ hydrocarboxylates, C1 -C4 carboxylates, C -C4 organic diacids and mixtures of these hydrotrope materials. The composition of the present invention preferably comprises from 0.5%> to 8%, by weight of the liquid detergent composition of a hydrotrope selected from alkali metal and calcium xylene and toluene sulfonates.
Suitable C1-C3 alkyl aryl sulfonates include sodium, potassium, calcium and ammonium xylene sulfonates; sodium, potassium, calcium and ammonium toluene sulfonates; sodium, potassium, calcium and ammonium cumene sulfonates; and sodium, potassium, calcium and ammonium substituted or unsubstituted naphthalene sulfonates and mixtures thereof.
Suitable Cj-Cg carboxylic sulfate or sulfonate salts are any water soluble salts or organic compounds comprising 1 to 8 carbon atoms (exclusive of substituent groups), which are substituted with sulfate or sulfonate and have at least one carboxylic group. The substituted organic compound may be cyclic, acylic or aromatic, i.e. benzene derivatives. Preferred alkyl compounds have from 1 to 4 carbon atoms substituted with sulfate or sulfonate and have from 1 to 2 carboxylic groups. Examples of this type of hydrotrope include sulfosuccinate salts, sulfophthalic salts, sulfoacetic salts, m- sulfobenzoic acid salts and diester sulfosuccinates, preferably the sodium or potassium salts as disclosed in U.S. 3,915,903. Suitable C1-C4 hydrocarboxylates and C1-C4 carboxylates for use herein include acetates and propionates and citrates. Suitable C2-C4 diacids for use herein include succinic, glutaric and adipic acids.
Other compounds which deliver hydrotropic effects suitable for use herein as a hydrotrope include Cg-Cι2 alkanols and urea.
Preferred hydrotropes for use herein are sodium, potassium, calcium and ammonium cumene sulfonate; sodium, potassium, calcium and ammonium xylene sulfonate; sodium, potassium, calcium and ammonium toluene sulfonate and mixtures thereof. Most preferred are sodium cumene sulfonate and calcium xylene sulfonate and mixtures thereof. These preferred hydrotrope materials can be present in the composition to the extent of from 0.5% to 8% by weight. Polymeric Suds Stabilizers
The compositions of the present invention may also contain a polymeric suds stabilizer. The compositions preferably comprise at least an effective amount of the polymeric suds stabilizers described herein, more preferably from about 0.01%> to about 10%), even more preferably from about 0.05%> to about 5%>, even more preferably still preferably from about 0.1 %> to about 2%> by weight, of said composition. What is meant herein by "an effective amount polymeric suds stabilizers " is that the suds volume and suds duration produced by the presently described compositions are sustained for an increased amount of time relative to a composition which does not comprise one or more of the polymeric suds stabilizer described herein. Additionally, the polymeric suds stabilizer can be present as the free base or as a salt. Typical counter ions include, citrate, maleate, sulfate, chloride, etc.
One preferred polymeric suds stabilizer are polymers comprising at least one monomeric unit of the formula:
Figure imgf000049_0001
wherein each of R1, R2 and R3 are independently selected from the group consisting of hydrogen, Ci to C6 alkyl, and mixtures thereof, preferably hydrogen, d to C3 alkyl, more preferably, hydrogen or methyl. L is selected from the group consisting of a bond, O, NR6, SR7R8 and mixtures thereof, preferably, O, NR6, wherein R6 is selected from the group consisting of hydrogen, C\ to C8 alkyl and mixtures thereof, preferably, hydrogen, Ci to C3, and mixtures thereof, more preferably hydrogen, methyl; each of R and R are independently hydrogen, O, Cj to C8 alkyl and mixtures thereof, preferably, hydrogen, Ci to C3, and mixtures thereof, more preferably hydrogen or methyl. By "O", an oxygen linked via a double bond is meant, such as a carbonyl group. Furthermore this means that when either or both R7R8 is "O", SR7R8 can have the following structures:
O R° O
II I II
-s — -s- -s —
R' O or O
7 R
Alternatively, SR R form a heterocyclic ring containing from 4 to 7 carbon atoms, optionally containing additional hetero atoms and optionally substituted. For example
SR7R8 can be:
Figure imgf000050_0001
However, it is preferred that SR7R8, when present, is not a heterocycle.
When L is a bond it means that there is a direct link, or a bond, between the carbonyl carbon atom to Z, when z is not zero. For example:
Figure imgf000050_0002
When L is a bond and z is zero, it means L is a bond from the carbonyl atom to A. For example:
Figure imgf000051_0001
Z is selected from the group consisting of: -(CH )-, (CH^CH^CH)-, -(CH2- CHOH)-, (CH2-CHNR6)-, -(CH2-CHR14-O)- and mixtures thereof, preferably -(CH2)-. R14 is selected from the group consisting of hydrogen, d to C6 alkyl and mixtures thereof, preferably hydrogen, methyl, ethyl and mixtures thereof; z is an integer selected from about 0 to about 12, preferably about 2 to about 10, more preferably about 2 to about 6.
A is NR4R5. Wherein each of R4 and R5 are is independently selected from the group consisting of hydrogen, Cj-Cg linear or branched alkyl, alkyleneoxy having the formula:
Figure imgf000051_0002
wherein R^O is C2-C4 linear or branched alkylene, and mixtures thereof; RU is hydrogen, Ci -C4 alkyl, and mixtures thereof; y is from 1 to about 10. Preferably R4 and R5 are independently, hydrogen, d to C4 alkyl. Alternatively, NR4R5 can form a heterocyclic ring containing from 4 to 7 carbon atoms, optionally containing additional hetero atoms, optionally fused to a benzene ring, and optionally substituted by C] to C8 hydrocarbyl. Examples of suitable heterocycles, both substituted and unsubstituted, are indolyl, isoindolinyl imidazolyl, imidazolinyl, piperidinyl pyrazolyl, pyrazolinyl, pyridinyl, piperazinyl, pyrrolidinyl, pyrrolidinyl, guanidino, amidino, quinidinyl, thiazolinyl, moφholine and mixtures thereof, with moφholino and piperazinyl being preferred. Furthermore the polymeric suds stabilizer has a molecular weight of from about 1,000 to about 2,000,000 preferably from about 5,000 to about 1,000,000, more preferably from about 10,000 to about 750,000, more preferably from about 20,000 to about 500,000, even more preferably from about 35,000 to about 300,000 daltons. The molecular weight of the polymeric suds boosters, can be determined via conventional gel permeation chromatography.
While, it is preferred that the polymeric suds stabilizers be selected from homopolymer, copolymers and teφolymers, other polymers (or multimers) of the at least one monomeric unit, the polymeric suds stabilizers can also be envisioned via polymerization of the at least one monomeric unit with a wider selection of monomers. That is, all the polymeric suds stabilizers can be a homopolymers, copolymers, teφolymers, etc. of the at least one monomeric unit, or the polymeric suds stabilizer can be copolymers, teφolymers, etc. containing one, two or more of the at least one monomeric unit and one, two or more monomeric units other than the at least one monomeric unit. In the copolymer, teφolymer, etc., the distribution of the monomers can be either random or repeating.
Some preferred suds stabilizing polymers are homopolymers, copolymers or teφolymers which comprise at least one monomeric units, selected from:
Figure imgf000052_0001
An example of a preferred homopolymer is 2-dimethylaminoethyl methacrylate (DMAM) having the formula:
Figure imgf000052_0002
Some preferred copolymers include: copolymers of
Figure imgf000053_0001
An example of a preferred copolymer is the (DMA)/(DMAM) copolymer having the general formula:
Figure imgf000053_0002
wherein the ratio of (DMA) to (DMAM) is about 1 to about 10, preferably about 1 to about 5, more preferably about 1 to about 3.
An example of a preferred copolymer is the (DMAM)/(DMA) copolymer having the general formula:
Figure imgf000053_0003
wherein the ratio of (DMAM) to (DMA) is about 1 to about 5, preferably about 1 to about 3. Another prefered suds stabilizing polymer are the proteinaceous suds stabilizers. These can be peptides, polypeptides, amino acid containing copolymers, and mixtures thereof. Any suitable amino acid can be used to form the backbone of the peptides, polypeptides, or amino acid containing copolymers of the present invention provided at least 10%) to about 40%> of said amino acids which comprise the peptides are capable of being protonated at a pH of from 7 to about 11.5.
In general, the amino acids suitable for use in forming the proteinaceous suds stabilizers of the present invention have from 2 to 22 carbon atoms, said amino acids having the formula:
Figure imgf000054_0001
wherein R and R^ are each independently hydrogen, Ci -Cg linear or branched alkyl, Ci - Cg substituted alkyl, and mixtures thereof. The indices x and y are each independently from 0 to 2.
An example of a more preferred amino acid according to the present invention is the amino acid lysine having the formula:
Figure imgf000054_0002
wherein R is a substituted C\ alkyl moiety, said substituent is 4-imidazolyl.
One type of suitable proteinaceous suds stabilizer is comprised entirely of amino acids. Said polyamino acid compounds may be naturally occurring peptides, polypeptides, enzymes, and the like, provided said compounds have an isoelectric point of from about 7 to about 11.5 and a molecular weight greater than or equal to about 1500 daltons. An example of a polyamino acid which is suitable as a proteinaceous suds stabilizer according to the present invention is the enzyme lysozyme. Another preferred polymeric suds stabilizers are homopolymers or copolymers wherein the monomers which comprise said homopolymers or copolymers contain a moiety capable of being protonated at a pH of from about 4 to about 12, or a moiety capable of being de-protonated at a pH of from about 4 to about 12, of a mixture of both types of moieties.
A preferred class of zwitterionic polymer suitable for use as a suds volume and suds duration enhancer has the formula:
Figure imgf000055_0001
wherein R is Cι -Cι2 linear alkylene, Cι -Cι 2 branched alkylene, and mixtures thereof; preferably C1-C4 linear alkylene, C3-C4 branched alkylene; more preferably methylene and 1 ,2-propylene. R1 and R2 are defined herein after. The index x is from 0 to 6; y is 0 or 1 ; z is 0 or 1. The index n has the value such that the zwitterionic polymers of the present invention have an average molecular weight of from about 1,000 to about 2,000,000 preferably from about 5,000 to about 1,000,000, more preferably from about 10,000 to about 750,000, more preferably from about 20,000 to about 500,000, even more preferably from about 35,000 to about 300,000 daltons. The molecular weight of the polymeric suds boosters, can be determined via conventional gel permeation chromatography.
Anionic Units - R* is a unit capable of having a negative charge at a pH of from about 4 to about 12. Preferred Rl has the formula:
Figure imgf000055_0002
wherein L is a linking unit independently selected from the following:
O O O O
I I II II II
— O-C-NR* — — C— O— — O— C — — O— C— O— — O —
' ' ' ' >and mixtures thereof, wherein R' is independently hydrogen, C1 -C4 alkyl, and mixtures thereof; preferably hydrogen or alternatively R' and S can form a heterocycle of 4 to 7 carbon atoms, optionally containing other hetero atoms and optionally substituted. Preferably the linking group L can be introduced into the molecule as part of the original monomer backbone, for example, a polymer having L units of the formula:
O
II — C— O — can suitably have this moiety introduced into the polymer via a carboxylate containing monomer, for example, a monomer having the general formula:
CO2H R2
I I (R)x-(CH)y-(CH)z
When the index i is 0, L is absent.
For anionic units S is a "spacing unit" wherein each S unit is independently selected from Cι -Cj2 linear alkylene, Cι-Cι 2 branched alkylene, C3-Cι2 linear alkenylene, C3~Cι2 branched alkenylene, C3-C1;?, hydroxyalkylene, C4-Cj dihydroxyalkylene, Cβ-Ci Q arylene, Cg-Cι 2 dialkylarylene, -(R O)]{R5-, (R5O)kR6(OR5)k-, -CH CH(OR7)CH2-, and mixtures thereof; wherein R5 is C2-C4 linear alkylene, C3-C4 branched alkylene, and mixtures thereof, preferably ethylene, 1,2- propylene, and mixtures thereof, more preferably ethylene; R^ is C2-Cι2 linear alkylene, and mixtures thereof, preferably ethylene; R7 is hydrogen, C1 -C4 alkyl, and mixtures thereof, preferably hydrogen. The index k is from 1 to about 20.
R is independently selected from hydrogen, -CO2M, -SO3M, -OSO3M, - CH2P(O)(OM)2, -OP(O)(OM) , units having the formula:
— CR8R9R10 wherein each R&, R9, and RlO is independently selected from the group consisting of hydrogen, -(CH2)mR^, and mixtures thereof, wherein RU is -CO2H, -SO3M, - OSO3M, -CH(CO2H)CH2CO2H, -CH2P(O)(OH)2, -OP(O)(OH)2, and mixtures thereof, preferably -CO H, -CH(CO2H)CH2CO2H, and mixtures thereof, more preferably -
CO2H; provided that one R^, R^, or RlO is not a hydrogen atom, preferably two R^, R^, or RIO units are hydrogen. M is hydrogen or a salt forming cation, preferably hydrogen. The index m has the value from 0 to 10.
Cationic Units - R2 is a unit capable of having a positive charge at a pH of from about 4 to about 12. Preferred R2 has the formula:
Figure imgf000057_0001
wherein L is a linking unit independently selected from the following:
O O O
II II II
— C— o — , — O— C — , — O— C— O — ,
O R' R O R' O R
II I I II I II I
— C-N— , — N-C — , — N-C-N— ,
R S R' O R' R' O
I II I II I I II
— N— C— N — , — O— C— N — , — N— C— O — ,
R' R' R
I I I
— N=C — , — C=N — , — N — , — O — , and mixtures thereof; wherein R' is independently hydrogen, C -C4 alkyl, and mixtures thereof; preferably hydrogen or alternatively R' and S can form a heterocycle of 4 to 7 carbon atoms, optionally containing other hetero atoms and optionally substituted.
When the index i' is equal to 0, L^ is absent.
For cationic units S is a "spacing unit" wherein each S unit is independently selected from C1-C12 linear alkylene, C1-C12 branched alkylene, C3-C12 linear alkenylene, C3-C12 branched alkenylene, C3-C12 hydroxyalkylene, C4-C12 dihydroxyalkylene, Cg-Ci Q arylene, C -Ci2 dialkylarylene, -(R5O)kR5-, - (R5O)kR6(OR5)k-, -CH2CH(OR7)CH -, and mixtures thereof; wherein R5 is C2-C linear alkylene, C3-C4 branched alkylene, and mixtures thereof, preferably ethylene, 1,2- propylene, and mixtures thereof, more preferably ethylene; R^ is C2-C12 linear alkylene, and mixtures thereof, preferably ethylene; R7 is hydrogen, C1 -C4 alkyl, and mixtures thereof, preferably hydrogen. The index k is from 1 to about 20. R4 is independently selected from amino, alkylamino carboxamide, 3-imidazolyl, 4-imidazolyl, 2-imidazolinyl, 4-imidazolinyl, 2-piperidinyl, 3-piperidinyl, 4-piperidinyl, 1-pyrazolyl, 3-pyrazoyl, 4-pyrazoyl, 5-pyrazoyl, 1-pyrazolinyl, 3-pyrazolinyl, 4- pyrazolinyl, 5-pyrazolinyl, 2-pyridinyl, 3-pyridinyl, 4-pyridinyl, piperazinyl, 2- pyrrolidinyl, 3 -pyrrolidinyl, guanidino, amidmo, and mixtures thereof, preferably dialkylamino having the formula:
— N(Rl l)2 wherein each RU is independently hydrogen, C1-C4 alkyl, and mixtures thereof, preferably hydrogen or methyl or alternatively the two Rl 1 can form a heterocycle of 4 to 8 carbon atoms, optionally containing other hetero atoms and optionally substituted.
An example of a preferred zwitterionic polymer according to the present invention has the formula:
Figure imgf000058_0001
CH2CH2CH2N+H(CH3)2 wherein X is Cg, n has a value such that the average molecular weight is from about
5,000 to about 1,000,000 daltons.
Further preferred zwitterionic polymers according to the present invention are polymers comprising monomers wherein each monomer has only cationic units or anionic units, said polymers have the formula:
Figure imgf000058_0002
wherein R, Rl, X, y, and z are the same as defined herein above; n + n2 = n such that n has a value wherein the resulting zwitterionic polymer has a molecular weight of form about 5,000 to about 1,000,000 daltons.
An example of a polymer having monomers with only an anionic unit or a cationic unit has the formula:
Figure imgf000059_0001
wherein the sum of nl and n2 provide a polymer with an average molecular weight of from about 5,000 to about 750,000 daltons.
Another preferred zwitterionic polymer according to the present invention are polymers which have limited crosslinking, said polymers having the formula:
Figure imgf000059_0002
wherein R, Rl, Ll, S, j', x, y, and z are the same as defined herein above; n' is equal to n", and the value n' + n" is less than or equal to 5% of the value of nl + n = n; n provides a polymer with an average molecular weight of from about 1,000 to about
2,000,000 daltons. R 2 is nitrogen, Ci -Ci 2 linear alkylene amino alkylene having the formula:
-R13-N-R1 -
L1, and mixtures thereof, wherein each Rl3 is independently Ll or ethylene. The zwitterionic polymers of the present invention may comprise any combination of monomer units, for example, several different monomers having various
Rl and R2 groups can be combined to form a suitable suds stabilizer. Alternatively the same Rl unit may be used with a selection of different R2 units and vice versa.
Furthermore another preferred type of polymeric suds stabilizers are polymers which contain units capable of having a cationic charge at a pH of from about 4 to about 12, provided that the suds stabilizer has an average cationic charge density from about 0.0005 to about 0.05 units per 100 daltons molecular weight at a pH of from about 4 to about 12. Additionally, the polymeric suds stabilizer can be present as the free base or as a salt. Typical counter ions include, citrate, maleate, sulfate, chloride, etc.
For the puφoses of the present invention the term "cationic unit" is defined as "a moiety which when incoφorated into the structure of the suds stabilizers of the present invention, is capable of maintaining a cationic charge within the pH range of from about 4 to about 12. The cationic unit is not required to be protonated at every pH value within the range of about 4 to about 12." Non- limiting examples of units which comprise a cationic moiety include lysine, ornithine, the monomeric unit having the formula:
Figure imgf000060_0001
the monomeric unit having the formula:
Figure imgf000060_0002
the monomeric unit having the formula:
Figure imgf000060_0003
the monomeric unit having the formula:
Figure imgf000060_0004
and the monomeric unifhaving the formula:
Figure imgf000061_0001
the latter of which also comprises a moiety capable of having an anionic charge at a pH of about 4 to about 12.
For the puφoses of the present invention the term "anionic unit" is defined as "a moiety which when incoφorated into the structure of the suds stabilizers of the present invention, is capable of maintaining an anionic charge within the pH range of from about 4 to about 12. The anionic unit is not required to be de-protonated at every pH value within the range of about 4 to about 12." Non- limiting examples of units which comprise a anionic moiety include, acrylic acid, methacrylic acid, glutamic acid, aspartic acid, the monomeric unit having the formula:
Figure imgf000061_0002
and the monomeric unit having the formula:
Figure imgf000061_0003
the latter of which also comprises a moiety capable of having a cationic charge at a pH of about 4 to about 12. This latter unit is defined herein as "a unit capable of having an anionic and a cationic charge at a pH of from about 4 to about 12."
For the puφoses of the present invention the term "non-charged unit" is defined as "a moiety which when incoφorated into the structure of the suds stabilizers of the present invention, has no charge within the pH range of from about 4 to about 12." Non- limiting examples of units which are "non-charged units" are styrene, ethylene, propylene, butylene, 1,2-phenylene, esters, amides, ketones, ethers, and the like. The units which comprise the polymers of the present invention may, as single units or monomers, have any pKa value.
The formulator may combine any suitable monomers or units to form a polymeric suds stabilizer, for example, amino acids may be combined with polyacrylate units.
Further information on these and other suitable suds stabilizing polymers, and processes for their preparation are further described in PCT/US98/24853 filed November 20, 1998 (Docket No. 6938), PCT/US98/24707 filed November 20, 1998(Docket No. 6939), PCT/US98/24699 filed November 20, 1998(Docket No. 6943), and PCT/US98/24852 filed November 20, 1998(Docket No. 6944).
Enzymes - Detergent compositions of the present invention may further comprise one or more enzymes which provide cleaning performance benefits. Said enzymes include enzymes selected from cellulases, hemicellulases, peroxidases, proteases, gluco- amylases, amylases, lipases, cutinases, pectinases, xylanases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, puUulanases, tannases, pentosanases, malanases, β-glucanases, arabinosidases or mixtures thereof. A preferred combination is a detergent composition having a cocktail of conventional applicable enzymes like protease, amylase, lipase, cutinase and/or cellulase. Enzymes when present in the compositions, at from about 0.0001%) to about 5% of active enzyme by weight of the detergent composition.
Proteolytic Enzyme - The proteolytic enzyme can be of animal, vegetable or microorganism (preferred) origin. The proteases for use in the detergent compositions herein include (but are not limited to) trypsin, subtilisin, chymotrypsin and elastase-type proteases. Preferred for use herein are subtilisin-type proteolytic enzymes. Particularly preferred is bacterial serine proteolytic enzyme obtained from Bacillus subtilis and/or Bacillus licheniformis.
Suitable proteolytic enzymes include Novo Industri A/S Alcalase® (preferred),
Esperase®' Savinase® (Copenhagen, Denmark), Gist-brocades' Maxatase®, Maxacal® and Maxapem 15® (protein engineered Maxacal®) (Delft, Netherlands), and subtilisin BPN and BPN'(preferred), which are commercially available. Preferred proteolytic enzymes are also modified bacterial serine proteases, such as those made by Genencor International, Inc. (San Francisco, California) which are described in European Patent 251,446B, granted December 28, 1994 (particularly pages 17, 24 and 98) and which are also called herein "Protease B". U.S. Patent 5,030,378, Venegas, issued July 9, 1991, refers to a modified bacterial serine proteolytic enzyme (Genencor International) which is called "Protease A" herein (same as BPN'). In" particular see columns 2 and 3 of U.S. Patent 5,030,378 for a complete description, including amino sequence, of Protease A and its variants. Other proteases are sold under the tradenames: Primase, Durazym, Opticlean and Optimase. Preferred proteolytic enzymes, then, are selected from the group consisting of Alcalase ® (Novo Industri A/S), BPN', Protease A and Protease B (Genencor), and mixtures thereof. Protease B is most preferred.
Of particular interest for use herein are the proteases described in U.S. Patent No. 5,470,733.
Also proteases described in our co-pending application USSN 08/136,797 can be included in the detergent composition of the invention.
Another preferred protease, referred to as "Protease D" is a carbonyl hydrolase variant having an amino acid sequence not found in nature, which is derived from a precursor carbonyl hydrolase by substituting a different amino acid for a plurality of amino acid residues at a position in said carbonyl hydrolase equivalent to position +76, preferably also in combination with one or more amino acid residue positions equivalent to those selected from the group consisting of +99, +101, +103, +104, +107, +123, +27, +105, +109, +126, +128, +135, +156, +166, +195, +197, +204, +206, +210, +216, +217, +218, +222, +260, +265, and/or +274 according to the numbering of Bacillus amyloliquefaciens subtilisin, as described in WO 95/10615 published April 20, 1995 by Genencor International (A. Baeck et al. entitled "Protease-Containing Cleaning Compositions" having U.S. Serial No. 08/322,676, filed October 13, 1994).
Useful proteases are also described in PCT publications: WO 95/30010 published November 9, 1995 by The Procter & Gamble Company; WO 95/30011 published November 9, 1995 by The Procter & Gamble Company; WO 95/29979 published November 9, 1995 by The Procter & Gamble Company.
Protease enzyme may be incoφorated into the compositions in accordance with the invention at a level of from 0.0001%> to 2% active enzyme by weight of the composition. Amylase - Amylases (α and/or β) can be included for removal of carbohydrate-based stains. Suitable amylases are Termamyl® (Novo Nordisk),
Fungamyl® and BAN® (Novo Nordisk). The enzymes may be of any suitable origin, such as vegetable, animal, bacterial, fungal and yeast origin. Amylase enzymes are normally incoφorated in the detergent composition at levels from 0.0001% to 2%, preferably from about 0.0001%) to about 0.5%, more preferably from about 0.0005% to about O.P/o, even more preferably from about 0.001%> to about 0.05%> of active enzyme by weight of the detergent composition.
Amylase enzymes also include those described in WO95/26397 and in co- pending application by Novo Nordisk PCT/DK96/00056. Other specific amylase enzymes for use in the detergent compositions of the present invention therefore include :
(a) α-amylases characterised by having a specific activity at least 25% higher than the specific activity of Termamyl® at a temperature range of 25°C to 55°C and at a pH value in the range of 8 to 10, measured by the Phadebas® -amylase activity assay. Such
Phadebas® α-amylase activity assay is described at pages 9-10, WO95/26397.
(b) α-amylases according (a) comprising the amino sequence shown in the SEQ ID listings in the above cited reference, or an α-amylase being at least 80%> homologous with the amino acid sequence shown in the SEQ ID listing.
(c) α-amylases according (a) obtained from an alkalophilic Bacillus species, comprising the following amino sequence in the N-terminal : His-His-Asn-Gly-Thr-Asn-Gly-Thr- Met-Met-Gln-Tyr-Phe-Glu-Tφ-Tyr-Leu-Pro-Asn-Asp.
A polypeptide is considered to be X%> homologous to the parent amylase if a comparison of the respective amino acid sequences, performed via algorithms, such as the one described by Lipman and Pearson in Science 227, 1985, p. 1435, reveals an identity of X%
(d) α-amylases according (a-c) wherein the α-amylase is obtainable from an alkalophilic Bacillus species; and in particular, from any of the strains NCIB 12289, NCIB 12512, NCIB 12513 and DSM 935.
In the context of the present invention, the term "obtainable from" is intended not only to indicate an amylase produced by a Bacillus strain but also an amylase encoded by a DNA sequence isolated from such a Bacillus strain and produced in an host organism transformed with said DNA sequence.
(e)α-amylase showing positive immunological cross-reactivity with antibodies raised against an α-amylase having an amino acid sequence corresponding respectively to those α-amylases in (a-d).
(f) Variants of the following parent α-amylases which (i) have one of the amino acid sequences shown in corresponding respectively to those α-amylases in (a-e), or (ii) displays at least 80%o homology with one or more of said amino acid sequences, and or displays immunological cross-reactivity with an antibody raised against an α-amylase having one of said amino acid sequences, and/or is encoded by a DNA sequence which hybridizes with the same probe as a DNA sequence encoding an α-amylase having one of said amino acid sequence; in which variants :
1. at least one amino acid residue of said parent α-amylase has been deleted; and/or
2. at least one amino acid residue of said parent α-amylase has been replaced by a different amino acid residue; and/or
3. at least one amino acid residue has been inserted relative to said parent α- amylase; said variant having an α-amylase activity and exhibiting at least one of the following properties relative to said parent α-amylase : increased thermostability, increased stability towards oxidation, reduced Ca ion dependency, increased stability and/or α-amylolytic activity at neutral to relatively high pH values, increased α-amylolytic activity at relatively high temperature and increase or decrease of the isoelectric point (pi) so as to better match the pi value for α- amylase variant to the pH of the medium.
Said variants are described in the patent application PCT/DK96/00056.
Other amylases suitable herein include, for example, α-amylases described in GB
1,296,839 to Novo; RAPID ASE®, International Bio-Synthetics, Inc. and
TERMAMYL®, Novo. FUNGAMYL® from Novo is especially useful. Engineering of enzymes for improved stability, e.g., oxidative stability, is known. See, for example J. Biological Chem., Vol. 260, No. 11, June 1985, pp. 6518-6521. Certain preferred embodiments of the present compositions can make use of amylases having improved stability in detergents such as automatic dishwashing types, especially improved oxidative stability as measured against a reference-point of TERMAMYL® in commercial use in 1993. These preferred amylases herein share the characteristic of being "stability-enhanced" amylases, characterized, at a minimum, by a measurable improvement in one or more of: oxidative stability, e.g., to hydrogen peroxide/tetraacetylethylenediamine in buffered solution at pH 9-10; thermal stability, e.g., at common wash temperatures such as about 60°C; or alkaline stability, e.g., at a pH from about 8 to about 11, measured versus the above-identified reference-point amylase. Stability can be measured using any of the art-disclosed technical tests. See, for example, references disclosed in WO 9402597. Stability-enhanced amylases can be obtained from Novo or from Genencor International. One class of highly preferred amylases herein have the commonality of being derived using site-directed mutagenesis from one or more of the Bacillus amylases, especially the Bacillus α-amylases, regardless of whether one, two or multiple amylase strains are the immediate precursors. Oxidative stability- enhanced amylases vs. the above-identified reference amylase are preferred for use, especially in bleaching, more preferably oxygen bleaching, as distinct from chlorine bleaching, detergent compositions herein. Such preferred amylases include (a) an amylase according to the hereinbefore incoφorated WO 9402597, Novo, Feb. 3, 1994, as further illustrated by a mutant in which substitution is made, using alanine or threonine, preferably threonine, of the methionine residue located in position 197 of the B. licheniformis alpha-amylase, known as TERMAMYL®, or the homologous position variation of a similar parent amylase, such as B. amyloliquefaciens, B. subtilis, or B. stearothermophilus; (b) stability-enhanced amylases as described by Genencor International in a paper entitled "Oxidatively Resistant alpha- Amylases" presented at the 207th American Chemical Society National Meeting, March 13-17 1994, by C. Mitchinson. Therein it was noted that bleaches in automatic dishwashing detergents inactivate alpha-amylases but that improved oxidative stability amylases have been made by Genencor from B. licheniformis NCIB8061. Methionine (Met) was identified as the most likely residue to be modified. Met was substituted, one at a time, in positions 8, 15, 197, 256, 304, 366 and 438 leading to specific mutants, particularly important being M197L and M197T with the M197T variant being the most stable expressed variant.
Stability was measured in CASCADE® and SUNLIGHT®; (c) particularly preferred amylases herein include amylase variants having additional modification in the immediate parent as described in WO 9510603 A and are available from the assignee,
Novo, as DURAMYL®. Other particularly preferred oxidative stability enhanced amylase include those described in WO 9418314 to Genencor International and WO 9402597 to Novo. Any other oxidative stability-enhanced amylase can be used, for example as derived by site-directed mutagenesis from known chimeric, hybrid or simple mutant parent forms of available amylases. Other preferred enzyme modifications are accessible. See WO 9509909 A to Novo.
Various carbohydrase enzymes which impart antimicrobial activity may also be included in the present invention. Such enzymes include endoglycosidase, Type II endoglycosidase and glucosidase as disclosed in U.S. Patent Nos. 5,041,236, 5,395,541, 5,238,843 and 5,356,803 the disclosures of which are herein incoφorated by reference. Of course, other enzymes having antimicrobial activity may be employed as well including peroxidases, oxidases and various other enzymes.
It is also possible to include an enzyme stabilization system into the compositions of the present invention when any enzyme is present in the composition.
Perfumes - Perfumes and perfumery ingredients useful in the present compositions and processes comprise a wide variety of natural and synthetic chemical ingredients, including, but not limited to, aldehydes, ketones, esters, and the like. Also included are various natural extracts and essences which can comprise complex mixtures of ingredients, such as orange oil, lemon oil, rose extract, lavender, musk, patchouli, balsamic essence, sandalwood oil, pine oil, cedar, and the like. Finished perfumes can comprise extremely complex mixtures of such ingredients. Finished perfumes typically comprise from about 0.01 %> to about 2%>, by weight, of the detergent compositions herein, and individual perfumery ingredients can comprise from about 0.0001 %> to about 90% of a finished perfume composition.
Non-limiting examples of perfume ingredients useful herein include: 7-acetyl- l,2,3,4,5,6,7,8-octahydro-l,l,6,7-tetramethyl naphthalene; ionone methyl; ionone gamma methyl; methyl cedrylone; methyl dihydrojasmonate; methyl 1,6,10-trimethyl- 2,5,9-cyclododecatrien-l-yl ketone; 7-acetyl-l,l,3,4,4,6-hexamethyl tetralin; 4-acetyl-6- tert-butyl- 1,1 -dimethyl indane; para-hydroxy-phenyl-butanone; benzophenone; methyl beta-naphthyl ketone; 6-acetyl-l, 1,2,3,3, 5-hexamethyl indane; 5-acetyl-3-isopropyl- 1,1,2,6-tetramethyl indane; 1-dodecanal, 4-(4-hydroxy-4-methylpentyl)-3-cyclohexene- 1 -carboxaldehyde; 7-hydroxy-3,7-dimethyl ocatanal; 10-undecen-l-al; iso-hexenyl cyclohexyl carboxaldehyde; formyl tricyclodecane; condensation products of hydroxycitronellal and methyl anthranilate, condensation products of hydroxycitronellal and indol, condensation products of phenyl acetaldehyde and indol; 2-mefhyl-3-(para- tert-butylphenyl)-propionaldehyde; ethyl vanillin; heliotropin; hexyl cinnamic aldehyde; amyl cinnamic aldehyde; 2-methyl-2-(para-iso-propylphenyl)-propionaldehyde; coumarin; decalactone gamma; cyclopentadecanolide; 16-hydroxy-9-hexadecenoic acid lactone; l,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethylcyclopenta-gamma-2-benzo- pyrane; beta-naphthol methyl ether; ambroxane; dodecahydro-3a,6,6,9a-tetramethyl- naphtho[2,lb]furan; cedrol, 5-(2,2,3-trimethylcyclopent-3-enyl)-3-methylpentan-2-ol; 2- ethyl-4-(2,2,3-trimethyl-3-cyclopenten-l-yl)-2-buten-l-ol; caryophyllene alcohol; tricyclodecenyl propionate; tricyclodecenyl acetate; benzyl salicylate; cedryl acetate; and para-(tert-butyl) cyclohexyl acetate.
Particularly preferred perfume materials are those that provide the largest odor improvements in finished product compositions containing cellulases. These perfumes include but are not limited to: hexyl cinnamic aldehyde; 2-methyl-3-(para-tert- butylphenyl)-propionaldehyde; 7-acetyl- 1 ,2,3,4,5,6,7,8-octahydro- 1 , 1 ,6,7-tetramethyl naphthalene; benzyl salicylate; 7-acetyl- 1,1, 3, 4,4,6-hexamethyl tetralin; para-tert-butyl cyclohexyl acetate; methyl dihydro jasmonate; beta-napthol methyl ether; methyl beta- naphthyl ketone; 2-methyl-2-(para-iso-propylphenyl)-propionaldehyde; 1,3,4,6,7,8- hexahydro-4,6,6,7,8,8-hexamethyl-cyclopenta-gamma-2-benzopyrane; dodecahydro- 3a,6,6,9a-tetramethylnaphtho[2,lb]furan; anisaldehyde; coumarin; cedrol; vanillin; cyclopentadecanolide; tricyclodecenyl acetate; and tricyclodecenyl propionate.
Other perfume materials include essential oils, resinoids, and resins from a variety of sources including, but not limited to: Peru balsam, Olibanum resinoid, styrax, labdanum resin, nutmeg, cassia oil, benzoin resin, coriander and lavandin. Still other perfume chemicals include phenyl ethyl alcohol, teφineol, linalool, linalyl acetate, geraniol, nerol, 2-(l,l-dimethylethyl)-cyclohexanol acetate, benzyl acetate, and eugenol. Carriers such as diethylphthalate can be used in the finished perfume compositions. Dispersant Polymers
The compositions used in the methods of the present invention may also optionally contain from about 0.1 %> to about 20%>, more preferably from about 0.5% to about 10%) by weight of the composition of a dispersant polymer. Dispersant polymers are compounds which act as soil suspending agents in the aqueous wash liquor. That is, they act to suspend the soils in solution and prevent the soils from re-depositing on the surfaces of fabrics or dishes. This allows soils to be removed with the wash liquor. Dispersant polymers are well-known and conventional and are available from BASF Coφ. and Rohm & Haas. Typical examples include polyethoxylated amines and acrylic acid/maleic acid copolymers. Soil Release Agents
The compositions according to the present invention may optionally comprise one or more soil release agents. Polymeric soil release agents are characterized by having both hydrophilic segments, to hydrophilize the surface of hydrophobic fibers, such as polyester and nylon, and hydrophobic segments, to deposit upon hydrophobic fibers and remain adhered thereto through completion of the laundry cycle and , thus, serve as an anchor for the hydrophilic segments. This can enable stains occuring subsequent to treatment with the soil release agent to be more easily cleaned in later washing procedures.
If utilized, soil release agents will generally comprise from about 0.01% to about 10%) preferably from about 0.1 %> to about 5%, more preferably from about 0.2%> to about 3% by weight, of the composition.
The following, all included herein by reference, describe soil release polymers suitable for us in the present invention. U.S. 5,691,298 Gosselink et al., issued November 25, 1997; U.S. 5,599,782 Pan et al., issued February 4, 1997; U.S. 5,415,807 Gosselink et al., issued May 16, 1995; U.S. 5,182,043 Morrall et al., issued January 26, 1993; U.S. 4,956,447 Gosselink et al, issued September 11, 1990; U.S. 4,976,879 Maldonado et al. issued December 11, 1990; U.S. 4,968,451 Scheibel et al., issued November 6, 1990; U.S. 4,925,577 Borcher, Sr. et al, issued May 15, 1990; U.S. 4,861,512 Gosselink, issued August 29, 1989; U.S. 4,877,896 Maldonado et al., issued October 31, 1989; U.S. 4,771,730 Gosselink et al., issued October 27, 1987; U.S. 711,730 Gosselink et al., issued December 8, 1987; U.S. 4,721,580 Gosselink issued January 26, 1988; U.S. 4,000,093 Nicol et al, issued December 28, 1976; U.S. 3,959,230 Hayes, issued May 25, 1976; U.S. 3,893,929 Basadur, issued July 8, 1975; and European Patent Application 0 219 048, published April 22, 1987 by Kud et al.
Further suitable soil release agents are described in U.S. 4,201,824 Voilland et al.; U.S. 4,240,918 Lagasse et al.; U.S. 4,525,524 Tung et al.; U.S. 4,579,681 Ruppert et al.; U.S. 4,220,918; U.S. 4,787,989; EP 279,134 A, 1988 to Rhone-Poulenc Chemie; EP 457,205 A to BASF (1991); and DE 2,335,044 to Unilever N.V., 1974; all incoφorated herein by reference. Brightener
Any optical brighteners or other brightening or whitening agents known in the art can be present at levels typically from about 0.05% to about 1.2%, by weight, in the compositions used herein. Commercial optical brighteners which may be useful in the present invention can be classified into subgroups, which include, but are not necessarily limited to, derivatives of stilbene, pyrazoline, coumarin, carboxylic acid, methinecyanines, dibenzothiphene-5,5-dioxide, azoles, 5- and 6-membered-ring heterocycles, and other miscellaneous agents. Examples of such brighteners are disclosed in "The Production and Application of Fluorescent Brightening Agents", M. Zahradnik, Published by John Wiley & Sons, New York (1982).
Specific examples of optical brighteners which are useful in the present compositions are those identified in U.S. Patent 4,790,856, issued to Wixon on December 13, 1988. These brighteners include the PHOR WHITE series of brighteners from Verona. Other brighteners disclosed in this reference include: Tinopal UNPA, Tinopal CBS and Tinopal 5BM; available from Ciba-Geigy; Artie White CC and Artie White CWD, available from Hilton-Davis, located in Italy; the 2-(4-stryl-phenyl)-2H- napthol[l,2-d]triazoles; 4,4'-bis- (l,2,3-triazol-2-yl)-stil- benes; 4,4'-bis(stryl)bisphenyls; and the aminocoumarins. Specific examples of these brighteners include 4-methyl-7- diethyl- amino coumarin; l,2-bis(-venzimidazol-2-yl)ethylene; 1,3-diphenyl-phrazolines; 2,5-bis(benzoxazol-2-yl)thiophene; 2-stryl-napth-[l,2-d]oxazole; and 2-(stilbene-4-yl)- 2H-naphtho- [l,2-d]triazole. See also U.S. Patent 3,646,015, issued February 29, 1972 to Hamilton. Anionic brighteners are preferred herein.
Other Ingredients - The compositions can further preferably comprise one or more detersive adjuncts selected from the following: polysaccharides, abrasives, bactericides, tarnish inhibitors, dyes, buffers, antifungal or mildew control agents, insect repellents, perfumes, thickeners, processing aids, anti-corrosive aids, stabilizers and antioxidants. A wide variety of other ingredients useful in detergent compositions can be included in the compositions herein, including other active ingredients, carriers, antioxidants, processing aids, dyes or pigments, solvents for liquid formulations, etc.
Usual ingredients can include one or more materials for assisting or enhancing cleaning performance, treatment of the substrate to be cleaned, or to modify the aesthetics of the composition. Usual detersive adjuncts of detergent compositions include the ingredients set forth in U.S. Pat. No. 3,936,537, Baskerville et al. Adjuncts which can also be used in the compositions employed in the present invention, in their conventional art-established levels for use (generally from 0%> to about 20%> of the detergent ingredients, preferably from about 0.5% to about 10%>), include other active ingredients such as enzyme stabilizers, color speckles, anti-tarnish and/or anti-corrosion agents, dyes, fillers, optical brighteners, germicides, alkalinity sources, anti-oxidants, enzyme stabilizing agents, perfumes, dyes, solubilizing agents, clay soil removal/anti- redeposition agents, carriers, processing aids, pigments, solvents for liquid formulations, fabric softeners, static control agents, etc. Dye transfer inhibiting agents, including polyamine N-oxides such as polyvinylpyridine N-oxide can be used. Dye-transfer- inhibiting agents are further illustrated by polyvinylpyrrolidone and copolymers of N- vinyl imidazole and N-vinyl pyrrolidone. If desired, soluble magnesium salts such as MgC_2, MgSO4, and the like, can be added at levels of, typically, 0.1%-2%, to enhance grease removal performance.
Various detersive ingredients employed in the present compositions optionally can be further stabilized by absorbing said ingredients onto a porous hydrophobic substrate, then coating said substrate with a hydrophobic coating. Preferably, the detersive ingredient is admixed with a surfactant before being absorbed into the porous substrate. In use, the detersive ingredient is released from the substrate into the aqueous washing liquor, where it performs its intended detersive function.
To illustrate this technique in more detail, a porous hydrophobic silica (trademark SIPERNAT D10, DeGussa) is admixed with a proteolytic enzyme solution containing 3%)-5%> of C13.15 ethoxylated alcohol (EO 7) nonionic surfactant. Typically, the enzyme/surfactant solution is 2.5 X the weight of silica. The resulting powder is dispersed with stirring in silicone oil (various silicone oil viscosities in the range of 500- 12,500 can be used). The resulting silicone oil dispersion is emulsified or otherwise added to the final detergent matrix. By this means, ingredients such as the aforementioned enzymes, bleaches, bleach activators, bleach catalysts, photoactivators, dyes, fluorescers, fabric conditioners and hydrolyzable surfactants can be "protected" for use in detergent compositions.
An antioxidant can be optionally added to the detergent compositions of the present invention. They can be any conventional antioxidant used in detergent compositions, such as 2,6-di-tert-butyl-4-methylphenol (BHT), carbamate, ascorbate, thiosulfate, monoethanolamine(MEA), diethanolamine, triethanolamine, etc. It is preferred that the antioxidant, when present, be present in the composition from about 0.001% to about 5% by weight.
The compositions of this invention can be in any form, including liquid, tablet, paste, gel, microemulsion or tricritical composition. Highly preferred embodiments are in liquid or gel form. Liquid detergent compositions can contain water and other solvents as carriers. Low molecular weight primary or secondary alcohols exemplified by methanol, ethanol, propanol, and isopropanol are suitable. Monohydric alcohols are preferred for solubilizing surfactant, but polyols such as those containing from 2 to about 6 carbon atoms and from 2 to about 6 hydroxy groups (e.g., 1,3-propanediol, ethylene glycol, glycerine, and 1,2-propanediol) can also be used. The compositions may contain from 5% to 90%,, typically 10% to 50% of such carriers.
An example of the procedure for making liquid compositions herein is as follows: - To the free water and citrate are added and dissolved. To this solution amine oxide, betaine, ethanol, hydrotrope and nonionic surfactant are added. If free water isn't available, the citrate are added to the above mix then stirred until dissolved. At this point, an acid is added to neutralize the formulation. It is preferred that the acid be chosen from organic acids such as maleic and citric, however, inorganic mineral acids may be employed as well. In preferred embodiments these acids are added to the formulation followed by diamine addition. AExS is added last.
Compositions of the invention will have a pH range of from about 2 to about 13, preferably, pH is alkaline, more preferably from about 7 to about 12.5, more preferably from about 8 to about 12, even more preferably from about 9 to about 11.5. Examples
All the below exemplified compositions are low foaming and have an IFT within the essential range. weight %
Figure imgf000073_0001
1. E9 Ethoxylated Alcohols as sold by the Shell Oil Co.
2. 1 ,3-bis(methylamino)cyclohexane.
3. Poly(DM A-co-DM AM) (3:1) Copolymer prepared according to Example 8.
4. Includes perfumes, dyes, ethanol, etc. weight %
Figure imgf000074_0001
2. 1 ,3-bis(methylamino)cyclohexane.
3. Poly(DM A-co-DM AM) (3:1) Copolymer.
4. Includes perfumes, dyes, ethanol, etc.
EXAMPLES 9 AND 10
Liquid gel-like compositions according to the present invention as prepared as followed:
STPP builder 17.5 16
K carbonate 8 -
Na carbonate - 1.5
K hydroxide 2 2.0
K silicate 4 1,5
Na silicate 2 3 thickener 1 1
Nitric acid 0.02 0.02
Al tristearate 0.1 - polymer dispersant2 0.5 -
Na benzoate 0.8 0.5
Surfactant 1.0 2.0
Perborate 2.2
Na hypochlorite 1.5 -
Water and Minors balance balanc
1 nonionic surfactant
2sodium polyacrylate of 4500 m.w.

Claims

What is claimed is:
1. An ultrasonic cleaning composition comprising from 0.001% to 99%>, by weight of composition of an ultrasonic cleaning agent, wherein said composition is low foaming, has an inter facial tension of from 10 mNm"1 to 0.0001 mNm"1 and is substantially free of antifoaming agents.
2. An ultrasonic cleaning composition according to claim 1 wherein said composition has an inter facial tension of from 1 mNm"1 to 0.0001 mNm"1.
3. An ultrasonic cleaning composition according to either of claims 1 or 2 wherein said ultrasonic cleaning agent is selected from the group consisting of builders, surfactants, enzymes, bleach activators, bleach catalysts, bleach boosters, bleaches, alkalinity sources, antibacterial agent, colorants, perfume, lime soap dispersants, polymeric dye transfer inhibiting agents, crystal growth inhibitors, photobleaches, heavy metal ion sequestrants, anti-taraishing agents, anti-microbial agents, antioxidants, anti-redeposition agents, soil release polymers, electrolytes, pH modifiers, thickeners, abrasives, metal ion salts, enzyme stabilizers, corrosion inhibitors, diamines, suds stabilizing polymers, solvents, process aids, perfumes, fabric softening agents, optical brighteners, hydrotropes. and mixtures thereof.
4. An ultrasonic cleaning composition according to any of claims 1 to 3 wherein said composition has suds height of less than 80 mm according to the suds cylinder test.
5. An ultrasonic cleaning composition according to any of claims 1 to 4 wherein said composition is in the form of a liquid, tablet, paste, gel, microemulsion or tricritical composition.
6. An ultrasonic cleaning composition according to any of claims 3 to 5 wherein said surfactant is selected from the group consisting of anionic, nonionic, amphoteric, cationic, zwitterionic and mixtures thereof.
7. An ultrasonic cleaning composition according to claim 6 wherein said anionic surfactant is selected from the group consisting of C6 to C18 branched or linear alkyl sulfates, C6 to C]8 branched or linear alkyl benzene sulfonates, C6 to d8 branched or linear alkyl alkoxy sulfates, C6 to C18 branched or linear alkyl carboxylates, and mixtures thereof.
8. An ultrasonic cleaning composition according to claim 6 wherein said nonionic surfactant is selected from the group consisting of nonionic surfactant selected from the group consisting of polyhydroxy fatty acid amides, betaines, sulfobetaines, alkyl polyglycosides, alkyl ethoxylates, amine oxide, ether-capped poly(oxyalylated) alcohols, low foaming nonionic surfactants and mixtures thereof.
9. An ultrasonic cleaning composition according to any of claims 3 to 8 wherein said enzyme is selected from the group consisting of protease, amylases, cellulases, lipases, hemicellulases, peroxidases, gluco-amylases, cutinases, pectinases, xylanases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, puUulanases, tannases, pentosanases, malanases, β-glucanases, arabinosidases and mixtures thereof.
10. An ultrasonic cleaning composition according to any of claims 3 to 9 wherein said composition comprises a bleach and said bleach is an oxygen bleach.
11. An ultrasonic cleaning composition according to any of claims 1 to 10 wherein said composition further comprises a bleach activator, bleach catalyst and mixtures thereof.
12. An ultrasonic cleaning composition according to any of claims 3 to 11 wherein said builder is selected from the group consisting of aluminosilicates, silicates, zeolites, polycarboxylates, phosphates, polyphosphates, phosphonates, nitrilotriacetic acid, carbonates, bicarbonates, and mixtures thereof.
13. An ultrasonic cleaning composition according to any of claims 3 to 12 wherein said diamine has the formula:
RN R
NN-X-N/ R R wherein each R is independently selected from the group consisting of hydrogen, Cl- C4 linear or branched alkyl, alkyleneoxy having the formula: (R2O)yR3
wherein R2 is C2-C4 linear or branched alkylene, and mixtures thereof; R3 is hydrogen, C1-C4 alkyl, and mixtures thereof; y is from 1 to about 10; X is a unit selected from: i) C3-C10 linear alkylene, C3-C10 branched alkylene, C3-C10 cyclic alkylene, C3-C10 branched cyclic alkylene, an alkyl eneoxyalkylene having the formula: (R2O)yR2
wherein R2 and y are the same as defined herein above; ii) C3-C10 linear, C3-C10 branched linear, C3-C10 cyclic, C3-C10 branched cyclic alkylene, C6-C10 arylene, wherein said unit comprises one or more electron donating or electron withdrawing moieties which provide said diamine with a pKa greater than about 8; and iii) mixtures of (i) and (ii); provided said diamine has a pKa of at least about 8.
14. A method of washing tableware said method comprising contacting soiled tableware in need of cleaning with an aqueous solution of the composition according to any of claims 1 to 13 and then imparting ultrasonic waves to said soiled tableware.
15. A method of removing tough food soil from a hard surface said method comprising contacting said soil with either an aqueous solution or a neat solution of the composition according to any of claims 1 to 13 and then imparting ultrasonic waves to said soil.
16. A composition according to any of claims 1 to 13 wherein said composition is designed to have dissolved air, preferably dissolved oxygen, removed by ultrasonic energy.
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US11072764B2 (en) 2017-11-13 2021-07-27 The Procter & Gamble Company Detergent composition

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