WO2005005591A1 - Fabric freshener compositions - Google Patents

Fabric freshener compositions Download PDF

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Publication number
WO2005005591A1
WO2005005591A1 PCT/GB2004/002907 GB2004002907W WO2005005591A1 WO 2005005591 A1 WO2005005591 A1 WO 2005005591A1 GB 2004002907 W GB2004002907 W GB 2004002907W WO 2005005591 A1 WO2005005591 A1 WO 2005005591A1
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WO
WIPO (PCT)
Prior art keywords
water
fragrance
weight
amount
freshener
Prior art date
Application number
PCT/GB2004/002907
Other languages
French (fr)
Inventor
Jeremy Nicholas Ness
Mauricio Cella E Santos
Mario Jovelino Delnunzio
Original Assignee
Quest International Services B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quest International Services B.V. filed Critical Quest International Services B.V.
Priority to BRPI0412371-9A priority Critical patent/BRPI0412371A/en
Priority to EP04743252A priority patent/EP1641907A1/en
Publication of WO2005005591A1 publication Critical patent/WO2005005591A1/en

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Classifications

    • 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
    • C11D3/50—Perfumes
    • C11D3/502—Protected perfumes
    • C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay

Definitions

  • This invention relates to water-soluble solid fabric freshener compositions comprising water-soluble supports and fragrances. More particularly, it relates to the use of such compositions as additives to rinse solutions to deposit effective amounts of fragrance on laundered fabrics.
  • Modern laundry detergents and fabric conditioners have become complex highly technological products involving combinations of many active materials such as surfactants, bleach activators, peroxides, chelants, builders, dyes, fragrances, conditioner actives, etc. Products involving combinations of laundry detergents and fabric conditioners are commonplace.
  • fabric conditioners are normally added to the rinse water during the final rinse cycle, which is generally of short duration. Consequently, the conditioner must be capable of rapid dispersion in the rinse water so as to produce an effective concentration of product for conditioning in the relatively short period of the rinse cycle. Similarly, when such products are used in the hand washing of clothes, the conditioner must disperse rapidly and easily in cold water.
  • the high cost of laundry powders and fabric conditioners derives from the cost of the actives used in their formulation and from associated transportation and packaging costs. Additionally, as liquid conditioners are mainly composed of water - which, in parts of the world, can be in scarce supply - a premium is paid to both package and transport diluted actives and fragrance within the conditioner.
  • the present invention provides a water-soluble solid fabric freshener composition
  • a water-soluble solid fabric freshener composition comprising:
  • composition of the invention is capable, in use, of depositing an effective amount of fragrance onto laundered fabrics.
  • the deposition of perfume on laundered fabrics is effected by contacting the fabrics with an aqueous solution or dispersion that contains the above-defined fabric freshener composition.
  • the invention provides a method for depositing an effective amount of a fragrance on laundered fabrics comprising:
  • Water-soluble solid fabric freshener compositions in accordance with the mvention can be readily formed into granules capable of rapid dispersion in rinse water at temperatures from 10°C to 30°C.
  • the compositions can be used to deliver fragrance to fabric without the need for additional actives.
  • the water-soluble support is present in an amount between 1 % by weight to 99% by weight, more preferably from 20% by weight to 99% by weight, even more preferably from 70% by weight to 99% by weight, based on the total weight of the composition.
  • the water-soluble support is of material that has a melting point above 45°C and that is water-soluble at water temperatures between 10°C to 30°C, more preferably at water temperatures between 15°C and 25°C.
  • Non-limiting examples of water-soluble support materials useful in the present invention include: alkali metal salts of inorganic acids (such as phosphoric, chloridic and sulphuric,); alkali metal salts of organic acids (such as acetic, citric); quaternary ammonium salts of inorganic and organic acids; low and high molecular weight sugars; porous starches; chemically modified starches; starch derivatives; water-soluble polymers (such as polyethylene glycol, poly vinyl alcohol, cellulose derivatives, poly vinyl pyrrolidones, poly acrylic acid and its derivatives); other organic materials (such as urea etc.); and mixtures thereof.
  • alkali metal salts of inorganic acids such as phosphoric, chloridic and sulphuric
  • organic acids such as acetic, citric
  • quaternary ammonium salts of inorganic and organic acids low and high molecular weight sugars
  • porous starches chemically modified starches
  • starch derivatives water-soluble polymers
  • water-soluble supports of the present invention are: sodium salts of inorganic and organic acids; low molecular weight sugars, such as sucrose; high molecular weight sugars, such as dextrins; organic materials, such as urea; and water-soluble polymers, such as polyvinyl alcohol, polyethylene glycol.
  • Typical water-soluble supports of the present invention will meet the following criteria: (i) water-solubility at 0°C of at least 5 wt%, more preferably 10wt%, most preferably 20wt%; (ii) cheap and readily available in large quantities; (iii) safe at the use level in the product; (iv) neutral colour (e.g. white, cream); (v) compatible with fragrance.
  • the fragrance is preferably present in an amount of at least 0.01 % by weight, more preferably from 0.01% by weight to 40% by weight, even more preferably from 0.1% by weight to 30% by weight, and even more preferably from 0.5% by weight to 20% by weight, based on the total weight of the composition.
  • the fabric freshener composition of the present invention is formulated into granules or tablets.
  • these granules or tablets have a particle size between 0.1 and 5mm, more preferably between 0.3 and 3mm, even more preferably between 0.5 and 2mm.
  • the size distribution is as even as possible to produce an aesthetically pleasing product and avoiding the formation of dust.
  • fragrance is provided to laundered fabrics by contacting such fabrics during a laundering operation with rinse water containing dispersed therein the fabric freshener composition of the present invention.
  • the process of the invention can be conveniently carried out in a washing machine during laundering or by contact of the fabrics with a wash solution or rinse solution during hand washing.
  • the fabric freshener composition of the present invention may be added to the rinse solution in an amount to provide a dosage of from about 0.1 to 10 g/litre, preferably 0.5 to 5 g/litre, and even more preferably 1 to 3 g/litre.
  • the pH of the rinse or wash solution containing the fabric freshener composition of the present invention is between pH 2 and 10, more preferably between pH 3 and 7 and even more preferably between pH 4 and 6.
  • the fabric freshener compositions of this invention lend themselves to packaging and packages may be made of sealed containers containing any desired amounts of such compositions that, being in dry form, may be readily distributed or shipped without difficulty. During such shipment, they do not pack or compress or cake and are directly available without further preparation for use in treating fabrics to impart freshness. Moreover the fabric fresheners of this invention have an additional advantage in that they may be prepared at ambient temperature with rninimum use of water
  • the rinse-stage fabric freshener compositions of the present invention may furthermore contain various additives commonly used in fabric freshener compositions to thereby enhance the aesthetic effects.
  • additives include pigments, fragrance carriers (such as fragrance absorbers and/or fragrance adsorbers), disintegrants, flow aids, emulsifiers, enzymes, optical brighteners, anti-microbial ingredients, bleach systems, easy ironing aids, sequestrants, and so on.
  • fragrance refers to odoriferous materials that are able to provide a pleasing fragrance to fabrics, and encompasses conventional materials commonly used in detergent compositions to counteract a malodour in such compositions and/or provide a pleasing fragrance thereto.
  • the fragrances are preferably in the liquid state at ambient temperature, although solid fragrances are also useful. Included among the fragrances contemplated for use herein are materials such as aldehydes, ketones, esters and the like which are conventionally employed to impart a pleasing fragrance to liquid and granular detergent compositions. Naturally occurring plant and animal oils are also commonly used as components of fragrances.
  • the fragrances useful for the present invention may have relatively simple compositions or may comprise complex mixtures of natural and synthetic chemical components, all of which are intended to provide a pleasant odour or fragrance when applied to fabrics.
  • Fragrances used in detergent compositions are generally selected to meet normal requirements of odour, stability, price and commercial availability.
  • a description of the materials conventionally used in detergent perfumery is set forth by R. T. Steltenkamp, The Journal of The American Oil Chemists Society, Vol. 45, No. 6, pp. 429-432, such disclosure being incorporated herein by reference.
  • fragrance carrier refers to any material that is able to absorb and/or adsorb fragrance and adhere to the water-soluble supports of this invention.
  • Typical fragrance carrier materials include, without limitation:
  • Inorganic materials that are compatible with perfume and can be porous or non-porous for example, silicas (both hydrophilic and hydrophobic), sodium tripolyphosphate, aluminas, zeolites, talc, hydrotalcites, clays, particularly bentonite clays, magnesium silicates and other related minerals.
  • Organic carrier materials both solid and liquid, that are compatible with perfume, for example starch, cellulose, other polysaccharides, triethyl citrate, tributyl citrate, dioctyl adipate, isoparaffins, waxes etc.
  • o Polymeric carrier materials both porous and non-porous, such as those disclosed in WO 98/28396, WO 98/28398 and EP 441512, PolyporeTM (marketed by Polypore Inc, Arlington, Arizona), PolytrapTM and MicrospongeTM (both from Cardinal Health, New Jersey, USA) and other porous carriers, such as those disclosed in WO 91/19483 and US 4873091.
  • Preferred materials in this category comprise isobutyl methacrylate as the main polymer, cross-linked with difunctional acrylate cross-linkers and using poly vinyl alcohol as a hydroxy-functional polymer, having a mean particle size in the range 70 to lOO ⁇ m.
  • Such materials can be prepared by the method of Example 2 of WO 98/28396 and WO 98/28398, e.g. as specified in Example 5 of those documents.
  • the fragrance carrier is preferably odourless or of low odour, having no significant odour that would affect the odour of the fragrance.
  • fragrance carrier materials include silicas, sodium tripolyphosphate, bentonite clay and polymer carrier materials disclosed in WO 98/29396 and WO 98/28398, e.g. as discussed above.
  • the fabric freshener composition of the present invention may be in the form of finely divided powders, as well as relatively larger-sized granules, beads or agglomerated particles, and may be produced by diverse methods of manufacture such as spray-drying, dry-blending or agglomeration of individual components.
  • the invention can provide a process for producing a fabric freshener composition in solid form where such process is capable of producing large quantities of the fabric freshener composition quickly and with the minimum requirement for water and with the use of readily available production equipment.
  • Our currently preferred methods of production are as follows:
  • This method may be used when the water-soluble support is unable to absorb fragrance.
  • the water-soluble support consists of a crystal material, such as sodium chloride, that is selected to be the desired size by sourcing and/or sieving.
  • a crystal material such as sodium chloride
  • To the crystal material is added, with stirring (using any standard equipment such as V type blenders, ribbon blenders, static mixer cones and double cones), a uniform coating of an outer layer of fragrance, or, if required, a layer of fragrance and fragrance carrier such as sodium tripolyphosphate.
  • the outer layer may also include any pigment or other secondary additives.
  • the inner crystal material defines the size and shape of the fabric freshener composition whilst the outer layer holds the fragrance, and other additives.
  • This method is used when the water-soluble support is able to absorb the fragrance.
  • the water-soluble support is granulated to the desired particle size by any standard granulation method know to those skilled in the art (such as powder layering, wet granulation and fluid bed agglomeration). Over and/or undersized particles are removed if required. Fragrance is then added to the granules with stirring. Flow aids are added if required. Pigments or other secondary additives may, if they are solid, be co-granulated with the water-soluble support or, if they are liquids, they may be added to the granules with the fragrance.
  • the finished fabric freshener composition generally contains less than about 1% water.
  • the above composition was prepared by Method 1 above.
  • the modified starch and fragrance were blended together in a ribbon blender for 15 minutes until uniformly mixed. This blend was then uniformly coated around the pre-sized sodium chloride granules in the blender. Finally, the amorphous silica flow aid was added to the coated granules and mixed until fully distributed.
  • the final freshness granules were white in colour and free-flowing.
  • the above composition was prepared by Method 2 above.
  • the sodium bicarbonate, citric acid and fragrance were blended together in a ribbon blender for 20 minutes until uniform granules of mean particle size 3mm were produced.
  • the amorphous silica flow aid was added to the granules and mixed until fully distributed.
  • the final product was off- white in colour and free flowing.
  • the above composition was prepared using the method of Example 1.
  • the final composition was off-white and free-flowing.
  • the above composition was prepared by the method described in Example 1.
  • the above composition was prepared by Method 1 above.
  • the bentonite and fragrance were blended together in a ribbon blender for about 15 minutes until uniformly mixed. This blend was then uniformly coated around the pre-sized sodium chloride granules in the blender. Finally, the amorphous silica flow aid was added to the coated granules and mixed until fully distributed.
  • Fragrance 5.0% Sodium chloride (granular, 1.0- 1.4mm mean size) 83.1% Water-soluble support Dioctyl adipate 5.0% Fragrance carrier STPP* 10.0% Fragrance carrier Silica** 3.0% Flow aid Process Blue Pigment (50% solution in water) 0.4%
  • the above composition was prepared by Method 1 above.
  • the dioctyl adipate and fragrance were pre-mixed and then blended with the STPP in a ribbon blender for 15 minutes until uniformly mixed.
  • the pigment and pre-sized sodium chloride were then mixed in a blender until a uniform dispersion was achieved.
  • the STPP/fragrance/dioctyl adipate mixture was then blended into the sodium chloride/pigment to provide a uniform coating. Finally the silica flow aid was added to the coated granules and mixed until fully distributed.
  • the above composition was prepared by Method 1 above.
  • the polymer and fragrance were pre-mixed and allowed to equilibriate for three hours.
  • the polymer/fragrance mixture was then blended with the STPP in a ribbon blender for 15 rninutes until uniformly mixed.
  • the STPP/fragrance/polymer mixture was then blended into the sodium chloride to provide a uniform coating.
  • the silica flow aid was added to the coated granules and mixed until fully distributed.

Abstract

A water-soluble solid fabric freshener compositions comprises (a) at least one water-soluble support; (b) at least one fragrance; and (c) optionally, up to 20 % by weight of at least one fragrance carrier. The compositions can be readily formed into granules capable of rapid dispersion in rinse or wash water at 10 °C to 30 °C. Such freshener composition can be used to deliver fragrance to fabric without the need for additional actives.

Description

TITLE: FABRIC FRESHENER COMPOSITIONS
FIELD OF INVENTION
This invention relates to water-soluble solid fabric freshener compositions comprising water-soluble supports and fragrances. More particularly, it relates to the use of such compositions as additives to rinse solutions to deposit effective amounts of fragrance on laundered fabrics.
BACKGROUND
Modern laundry detergents and fabric conditioners have become complex highly technological products involving combinations of many active materials such as surfactants, bleach activators, peroxides, chelants, builders, dyes, fragrances, conditioner actives, etc. Products involving combinations of laundry detergents and fabric conditioners are commonplace.
In domestic laundering using washing machines, fabric conditioners are normally added to the rinse water during the final rinse cycle, which is generally of short duration. Consequently, the conditioner must be capable of rapid dispersion in the rinse water so as to produce an effective concentration of product for conditioning in the relatively short period of the rinse cycle. Similarly, when such products are used in the hand washing of clothes, the conditioner must disperse rapidly and easily in cold water.
There are, in many parts of the world, people who, for varying reasons, do not have access to modern laundry detergents and/or modern washing equipment, and, as a result, they are unable to take advantage of the freshness benefits that the fragrance in laundry powders and/or fabric conditioners would bring to the washing process and to their washed clothes. For example, in many tropical countries, people find it difficult to effectively dry their clothes, particularly in the rainy season. As a result such clothes tend to form unpleasant odours thus negating one of the major benefits of the washing process. Although the addition of fabric conditioners and/or laundry powders to the rinse solution can mitigate this effect, a large number of people cannot afford such products due to thefr relatively high cost.
The high cost of laundry powders and fabric conditioners derives from the cost of the actives used in their formulation and from associated transportation and packaging costs. Additionally, as liquid conditioners are mainly composed of water - which, in parts of the world, can be in scarce supply - a premium is paid to both package and transport diluted actives and fragrance within the conditioner.
Thus, until the freshener compositions of this invention were discovered, there existed a need for a simple cost-effective means of imparting fragrance to laundry and to wash solutions.
The use of granular materials contahring fragrances to provide fragrance and freshening effects is known - US 5,041,421 (MARI-MANN HERB CO. , INC) discloses slow dissolving moulded pellets of sodium chloride for use as room fresheners, where such pellets may be subject to partial dissolution without removing all the fragrance; WO01/79411 (RECKITT BENCKISER) discloses fragranced water-softener granules contairrmg an effervescent system to improve the sustainability of the fragrance; US 6,426,325 (ROBERTET FRAGRANCES) discloses a dry inorganic substrate on which is deposited a uniform layer of fragrance that is used to impart fragrance to a second particulate material without the need to wet the second material; US published application number 2003198680 (SHEFER) discloses a ree-flowing powder comprised of nanospheres encapsulated in microspheres; US published application number 2003194416 (SHEFER) describes a moisture triggered release system that may be incorporated into a range of consumer and cosmetic products, comprising selected fragrances and a water-sensitive matrix comprising organic materials, in particular water-soluble and water-dispersible polymers and co-polymers; WO 98/28398 (CLBA, QUEST) and WO 98/28396 (QUEST) both disclose solid perfumed particles insoluble in water and comprising an outer layer of polymer which promotes deposition onto fabric.
SUMMARY OF INVENTION
In one aspect the present invention provides a water-soluble solid fabric freshener composition comprising:
(a) at least one water-soluble support; (b) at least one fragrance; and (c) optionally, up to 20% by weight of at least one fragrance carrier.
The composition of the invention is capable, in use, of depositing an effective amount of fragrance onto laundered fabrics. The deposition of perfume on laundered fabrics is effected by contacting the fabrics with an aqueous solution or dispersion that contains the above-defined fabric freshener composition.
Thus, in a further aspect the invention provides a method for depositing an effective amount of a fragrance on laundered fabrics comprising:
(a) dispersing a freshener composition in accordance with the invention in wash water or rinse water of a washing machine or hand washing operation; and
(b) contacting the laundered fabrics with said fragrance in the wash water or rinse water whereby at least a partial amount of the fragrance in said freshener composition is deposited on the laundered fabrics.
Water-soluble solid fabric freshener compositions in accordance with the mvention can be readily formed into granules capable of rapid dispersion in rinse water at temperatures from 10°C to 30°C. The compositions can be used to deliver fragrance to fabric without the need for additional actives. Preferably, the water-soluble support is present in an amount between 1 % by weight to 99% by weight, more preferably from 20% by weight to 99% by weight, even more preferably from 70% by weight to 99% by weight, based on the total weight of the composition.
There are a large number of both organic and inorganic materials that could potentially be used as the water-soluble support. Any water-soluble material or mixtures of materials that are solid at room temperature and readily dissolve in water can in principle be used as the water-soluble support. Preferably, the water-soluble support is of material that has a melting point above 45°C and that is water-soluble at water temperatures between 10°C to 30°C, more preferably at water temperatures between 15°C and 25°C.
Non-limiting examples of water-soluble support materials useful in the present invention include: alkali metal salts of inorganic acids (such as phosphoric, chloridic and sulphuric,); alkali metal salts of organic acids (such as acetic, citric); quaternary ammonium salts of inorganic and organic acids; low and high molecular weight sugars; porous starches; chemically modified starches; starch derivatives; water-soluble polymers (such as polyethylene glycol, poly vinyl alcohol, cellulose derivatives, poly vinyl pyrrolidones, poly acrylic acid and its derivatives); other organic materials (such as urea etc.); and mixtures thereof.
Examples of water-soluble supports of the present invention are: sodium salts of inorganic and organic acids; low molecular weight sugars, such as sucrose; high molecular weight sugars, such as dextrins; organic materials, such as urea; and water-soluble polymers, such as polyvinyl alcohol, polyethylene glycol.
Currentiy water-soluble support materials include sodium chloride, urea, sucrose, sodium acetate, polyethylene glycol and sodium sulphate. The currently most preferred material is sodium chloride. Typical water-soluble supports of the present invention will meet the following criteria: (i) water-solubility at 0°C of at least 5 wt%, more preferably 10wt%, most preferably 20wt%; (ii) cheap and readily available in large quantities; (iii) safe at the use level in the product; (iv) neutral colour (e.g. white, cream); (v) compatible with fragrance.
The fragrance is preferably present in an amount of at least 0.01 % by weight, more preferably from 0.01% by weight to 40% by weight, even more preferably from 0.1% by weight to 30% by weight, and even more preferably from 0.5% by weight to 20% by weight, based on the total weight of the composition.
It is preferable that the fabric freshener composition of the present invention is formulated into granules or tablets. Preferably, these granules or tablets have a particle size between 0.1 and 5mm, more preferably between 0.3 and 3mm, even more preferably between 0.5 and 2mm.
Preferably the size distribution is as even as possible to produce an aesthetically pleasing product and avoiding the formation of dust.
In accordance with the process aspect of the present invention, fragrance is provided to laundered fabrics by contacting such fabrics during a laundering operation with rinse water containing dispersed therein the fabric freshener composition of the present invention.
The process of the invention can be conveniently carried out in a washing machine during laundering or by contact of the fabrics with a wash solution or rinse solution during hand washing.
The fabric freshener composition of the present invention may be added to the rinse solution in an amount to provide a dosage of from about 0.1 to 10 g/litre, preferably 0.5 to 5 g/litre, and even more preferably 1 to 3 g/litre. Preferably the pH of the rinse or wash solution containing the fabric freshener composition of the present invention is between pH 2 and 10, more preferably between pH 3 and 7 and even more preferably between pH 4 and 6.
The fabric freshener compositions of this invention lend themselves to packaging and packages may be made of sealed containers containing any desired amounts of such compositions that, being in dry form, may be readily distributed or shipped without difficulty. During such shipment, they do not pack or compress or cake and are directly available without further preparation for use in treating fabrics to impart freshness. Moreover the fabric fresheners of this invention have an additional advantage in that they may be prepared at ambient temperature with rninimum use of water
The rinse-stage fabric freshener compositions of the present invention may furthermore contain various additives commonly used in fabric freshener compositions to thereby enhance the aesthetic effects. Examples of these additives include pigments, fragrance carriers (such as fragrance absorbers and/or fragrance adsorbers), disintegrants, flow aids, emulsifiers, enzymes, optical brighteners, anti-microbial ingredients, bleach systems, easy ironing aids, sequestrants, and so on.
The term "fragrance" as used herein refers to odoriferous materials that are able to provide a pleasing fragrance to fabrics, and encompasses conventional materials commonly used in detergent compositions to counteract a malodour in such compositions and/or provide a pleasing fragrance thereto. The fragrances are preferably in the liquid state at ambient temperature, although solid fragrances are also useful. Included among the fragrances contemplated for use herein are materials such as aldehydes, ketones, esters and the like which are conventionally employed to impart a pleasing fragrance to liquid and granular detergent compositions. Naturally occurring plant and animal oils are also commonly used as components of fragrances. Accordingly, the fragrances useful for the present invention may have relatively simple compositions or may comprise complex mixtures of natural and synthetic chemical components, all of which are intended to provide a pleasant odour or fragrance when applied to fabrics. Fragrances used in detergent compositions are generally selected to meet normal requirements of odour, stability, price and commercial availability. A description of the materials conventionally used in detergent perfumery is set forth by R. T. Steltenkamp, The Journal of The American Oil Chemists Society, Vol. 45, No. 6, pp. 429-432, such disclosure being incorporated herein by reference.
The term "fragrance carrier" as used herein refers to any material that is able to absorb and/or adsorb fragrance and adhere to the water-soluble supports of this invention. Typical fragrance carrier materials include, without limitation:
• Inorganic materials that are compatible with perfume and can be porous or non-porous, for example, silicas (both hydrophilic and hydrophobic), sodium tripolyphosphate, aluminas, zeolites, talc, hydrotalcites, clays, particularly bentonite clays, magnesium silicates and other related minerals.
» Organic carrier materials, both solid and liquid, that are compatible with perfume, for example starch, cellulose, other polysaccharides, triethyl citrate, tributyl citrate, dioctyl adipate, isoparaffins, waxes etc.
o Polymeric carrier materials, both porous and non-porous, such as those disclosed in WO 98/28396, WO 98/28398 and EP 441512, Polypore™ (marketed by Polypore Inc, Tucson, Arizona), Polytrap™ and Microsponge™ (both from Cardinal Health, New Jersey, USA) and other porous carriers, such as those disclosed in WO 91/19483 and US 4873091. Preferred materials in this category comprise isobutyl methacrylate as the main polymer, cross-linked with difunctional acrylate cross-linkers and using poly vinyl alcohol as a hydroxy-functional polymer, having a mean particle size in the range 70 to lOOμm. Such materials can be prepared by the method of Example 2 of WO 98/28396 and WO 98/28398, e.g. as specified in Example 5 of those documents.
When the fragrance carrier is liquid, the fragrance will be dispersed about the body of the water-soluble support. When the fragrance carrier is solid, the perfume will tend to be located at the periphery of the water-soluble support. The fragrance carrier is preferably odourless or of low odour, having no significant odour that would affect the odour of the fragrance.
Currently preferred fragrance carrier materials include silicas, sodium tripolyphosphate, bentonite clay and polymer carrier materials disclosed in WO 98/29396 and WO 98/28398, e.g. as discussed above.
The fabric freshener composition of the present invention may be in the form of finely divided powders, as well as relatively larger-sized granules, beads or agglomerated particles, and may be produced by diverse methods of manufacture such as spray-drying, dry-blending or agglomeration of individual components. The invention can provide a process for producing a fabric freshener composition in solid form where such process is capable of producing large quantities of the fabric freshener composition quickly and with the minimum requirement for water and with the use of readily available production equipment. Our currently preferred methods of production are as follows:
Method 1.
This method may be used when the water-soluble support is unable to absorb fragrance.
The water-soluble support consists of a crystal material, such as sodium chloride, that is selected to be the desired size by sourcing and/or sieving. To the crystal material is added, with stirring (using any standard equipment such as V type blenders, ribbon blenders, static mixer cones and double cones), a uniform coating of an outer layer of fragrance, or, if required, a layer of fragrance and fragrance carrier such as sodium tripolyphosphate. The outer layer may also include any pigment or other secondary additives. The inner crystal material defines the size and shape of the fabric freshener composition whilst the outer layer holds the fragrance, and other additives. By carefully defining, preparing and/or sourcing the inner crystal material, fabric freshener compositions of uniform size can be prepared. Method 2.
This method is used when the water-soluble support is able to absorb the fragrance.
The water-soluble support is granulated to the desired particle size by any standard granulation method know to those skilled in the art (such as powder layering, wet granulation and fluid bed agglomeration). Over and/or undersized particles are removed if required. Fragrance is then added to the granules with stirring. Flow aids are added if required. Pigments or other secondary additives may, if they are solid, be co-granulated with the water-soluble support or, if they are liquids, they may be added to the granules with the fragrance.
The finished fabric freshener composition generally contains less than about 1% water.
The following specific examples will further illustrate this invention; the parts indicated being percentage by weight.
EXAMPLE 1
Fragrance 5.0% Modified Starch * 10.0% Fragrance carrier Amorphous silica 1.5% Flow aid Sodium chloride ** 83.5% Water-soluble support
* Capsul E™ ex National Starch & Chemical Company (Bridgwater USA) ** 2 - 3mm mean particle size
The above composition was prepared by Method 1 above. The modified starch and fragrance were blended together in a ribbon blender for 15 minutes until uniformly mixed. This blend was then uniformly coated around the pre-sized sodium chloride granules in the blender. Finally, the amorphous silica flow aid was added to the coated granules and mixed until fully distributed.
The final freshness granules were white in colour and free-flowing.
EXAMPLE 2
Fragrance 5.0% STPP * 10.0% Fragrance carrier Amorphous silica ΦΦ 1.5% Flow aid Sucrose *** 83.5% Water-soluble support
* Sodium tripolyphosphate ** Aerosil™ ex Degussa AG *** Refined granulated white sugar, mean particle size 2mm
The above composition by prepared by the method described in Example 1. The final product was cream in colour and free-flowing.
EXAMPLE 3
Fragrance 5.0% Amorphous silica 1.0% Flow aid Sodium sulphate anhydrous 94.0% Water-soluble support
The above composition was prepared by Method 2 above. The sodium sulphate and fragrance were blended together in a ribbon blender for 15 minutes until uniform granules of mean particle size 3mm were produced. Finally, the amorphous silica flow aid was added to the granules and mixed until fully distributed. The final product was off-white in colour and free flowing. EXAMPLE 4
Sodium Bicarbonate 45.0% Water-soluble si Fragrance 5.0% Amorphous Silica 1.0% Flow Aid Citric Acid 48.0% Dissolution Aid
The above composition was prepared by Method 2 above. The sodium bicarbonate, citric acid and fragrance were blended together in a ribbon blender for 20 minutes until uniform granules of mean particle size 3mm were produced. Finally, the amorphous silica flow aid was added to the granules and mixed until fully distributed. The final product was off- white in colour and free flowing.
EXAMPLE 5
Sodium citrate 79.0% Water-soluble sup Fragrance 5.0% Sodium sulphate 15.0% Fragrance Carrier Amorphous silica 1.0% Flow aid
The above composition by prepared by the method described in Example 1. The final product was cream in colour and free-flowing.
EXAMPLE 6
Modified starch * 94.0 % Water-soluble support Fragrance, LF1862 ** 5.0% Amorphous silica 1.0% Flow aid
* Capsul E ™ ex National Starch & Chemical (Bridgwater USA) ** Available from Quest International The above composition was prepared by the method described in Example 3. The final product was white and free-flowing.
EXAMPLE 7
Urea pellets * 83.0% Water-soluble suppoi Fragrance LF1862 ** 5.0% Amorphous silica 2.0% Flow aid STPP *** 4.0% Fragrance carrier #1 Talc 6.0% Fragrance carrier #2
* Selected to be 2-3mm size range ** Available from Quest International *** sodium tripolyphosphate
The above composition was prepared using the method of Example 1. The final composition was off-white and free-flowing.
EXAMPLE 8
Fragrance 3.0% Tributyl citrate 3% Fragrance carrier Amorphous silica 3% Flow aid Sodium chloride 91% Water-soluble support
The above composition was prepared by the method described in Example 1.
EXAMPLE 9
Fragrance 5.0% Sodium chloride (granular , 1.0-1.4mm mean size) 83.5% Water-soluble support
Bentonite* 10.0% Fragrance carrier Silica** 1.5% Flow aid
*Laundrosil DGA™ powder (Sud-Chemie AG, Munchen, Germany) ** Syloid SP241™ (Grace Davison, Columbia, USA)
The above composition was prepared by Method 1 above. The bentonite and fragrance were blended together in a ribbon blender for about 15 minutes until uniformly mixed. This blend was then uniformly coated around the pre-sized sodium chloride granules in the blender. Finally, the amorphous silica flow aid was added to the coated granules and mixed until fully distributed.
EXAMPLE 10
Fragrance 5.0% Sodium chloride (granular, 1.0- 1.4mm mean size) 83.1% Water-soluble support Dioctyl adipate 5.0% Fragrance carrier STPP* 10.0% Fragrance carrier Silica** 3.0% Flow aid Process Blue Pigment (50% solution in water) 0.4%
*Sodium tripolyphosphate
** Syloid SP241 ™ (Grace Davison, Columbia, USA)
The above composition was prepared by Method 1 above. The dioctyl adipate and fragrance were pre-mixed and then blended with the STPP in a ribbon blender for 15 minutes until uniformly mixed. The pigment and pre-sized sodium chloride were then mixed in a blender until a uniform dispersion was achieved. The STPP/fragrance/dioctyl adipate mixture was then blended into the sodium chloride/pigment to provide a uniform coating. Finally the silica flow aid was added to the coated granules and mixed until fully distributed.
EXAMPLE 11
Fragrance 5.0% Sodium chloride (granular, 1.0- 1.4mm mean size) 78.5% Water-soluble support Polymer * 5.0% Fragrance carrier STPP** 10.0% Fragrance carrier Silica*** 1.5% Flow aid
* Isobutyl methacrylate cross-linked with hydroxypropylmethacrylate, with poly vinyl alcohol hydroxy functional polymer, as described in Example 5 of WO 98/28396 and WO
98/29398.
**Sodium tripolyphosphate
*** Syloid SP241™ (Grace Davison, Columbia, USA)
The above composition was prepared by Method 1 above. The polymer and fragrance were pre-mixed and allowed to equilibriate for three hours. The polymer/fragrance mixture was then blended with the STPP in a ribbon blender for 15 rninutes until uniformly mixed. The STPP/fragrance/polymer mixture was then blended into the sodium chloride to provide a uniform coating. Finally the silica flow aid was added to the coated granules and mixed until fully distributed.

Claims

1. A water-soluble solid fabric freshener composition comprising: (a) at least one water-soluble support; (b) at least one fragrance; and (c) optionally, up to 20% by weight of at least one fragrance carrier.
2. A freshener composition accordingly to claim 1, wherein the water-soluble support comprises one or more materials selected from the following: alkali metal salts of inorganic acids; alkali metal salts of organic acids; quaternary ammonium salts of inorganic acids; quaternary ammonium salts of organic acids; low molecular weight sugars; high molecular weight sugars; porous starches; chemically-modified starches; starch derivatives; and water-soluble polymers.
3. A freshener composition according to claim 1 or 2, wherein the water-soluble support has a melting point above 45°C.
4. A freshener composition according to claim 1, 2 or 3, wherein the water-soluble support is water-soluble at a temperature in the range 10°C to 30°C, preferably a temperature in the range 15°C to 25°C.
5. A freshener composition accordingly to claim 1, wherein the water-soluble support is selected from the group consisting of: sodium chloride; urea; sucrose; sodium acetate; polyethylene glycol and sodium sulphate.
6. A freshener composition according to any one of the preceding claims, wherein the water-soluble support is present in an amount from 1 to 99% by weight based on the weight of the total composition, preferably in an amount from 20 to 99 % by weight based on the weight of the total composition, more preferably in an amount from 70 to 99% by weight based on the weight of the total composition.
7. A freshener composition according to any one of the preceding claims, wherein the fragrance is present in an amount of at least 0.01 % by weight based on the weight of the total composition, preferably in an amount from 0.01 to 40% by weight based on the weight of the total composition, more preferably in an amount from 0.1 to 30% by weight based on the weight of the total composition, most preferably in an amount from 0.5 to 20% by weight based on the weight of the total composition.
8. A freshener composition according to any one of the proceeding claims, wherein the composition comprises a granule or tablet.
9. A freshener composition according to claim 8, wherein the granule or tablet has a particle size between 0.1 and 5mm, preferably between 0.3 and 3mm, more preferably between 0.5 and 2mm.
10. A freshener composition according to any one of the preceding claims, wherein the fragrance carrier comprises one or more materials selected from the following: silicas, sodium tripolyphosphate, bentonite clay, and isobutyl methacrylate cross- linked with difunctional acrylate cross-linker.
11. A method for depositing an effective amount of a fragrance on laundered fabrics comprising:
(a) dispersing a freshener composition in accordance with any one of claims 1 to 10, in wash water or rinse water of a washing machine or hand washing operation; and (b) contacting the laundered fabrics with said fragrance in the wash water or rinse water whereby at least a partial amount of the fragrance in said freshener composition is deposited on the laundered fabrics.
12. A method according to claim 11, wherein the freshener composition is present in said wash water or rinse water in an amount from 0.1 to 10.0 g/litre, preferably in an amount from 0.5 to 5 g/litre, more preferably in an amount from 1.0 to 3.0 g/litre.
13. A method of preparing a freshener composition in accordance with any one of the preceding claims, whereby the water-soluble support is selected to be non- absorbent of the fragrance, and the fragrance is added to the selected water-soluble support as an outer layer.
PCT/GB2004/002907 2003-07-08 2004-07-06 Fabric freshener compositions WO2005005591A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BRPI0412371-9A BRPI0412371A (en) 2003-07-08 2004-07-06 deodorant composition for tissue, and methods for depositing an effective amount of a fragrance in washed fabrics, and for preparing a deodorant composition
EP04743252A EP1641907A1 (en) 2003-07-08 2004-07-06 Fabric freshener compositions

Applications Claiming Priority (2)

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GB0315946.4 2003-07-08
GB0315946A GB0315946D0 (en) 2003-07-08 2003-07-08 Fabric freshener compositions

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WO2007113069A1 (en) 2006-04-06 2007-10-11 Henkel Ag & Co. Kgaa Solid, textile and/or skin care composition
WO2007115872A1 (en) * 2006-04-06 2007-10-18 Henkel Ag & Co. Kgaa Solid textile care composition comprising a water-soluble polymer
US7681725B2 (en) 2007-02-23 2010-03-23 The Procter And Gamble Company Container with ability to transfer a material to container content
US7850038B2 (en) 2007-02-23 2010-12-14 The Procter & Gamble Company Scented container
WO2011006779A1 (en) * 2009-07-16 2011-01-20 Henkel Ag & Co. Kgaa Solid, fragrance-transmitting composition having good cold-water solubility
WO2011011247A1 (en) 2009-07-20 2011-01-27 The Procter & Gamble Company Liquid fabric enhancer composition comprising a di-hydrocarbyl complex
WO2018055121A1 (en) * 2016-09-26 2018-03-29 Henkel Ag & Co. Kgaa Solid particulate compositions comprising water-soluble carrier polymer and perfume
US10030217B2 (en) 2006-11-16 2018-07-24 Henkel Ag & Co. Kgaa Solid textile care and/or skincare composition
US10301575B2 (en) 2015-04-14 2019-05-28 The Procter & Gamble Company Consumer product composition comprising a polyethylene glycol carrier with silicone particles dispersed therein
US10329519B2 (en) 2016-10-19 2019-06-25 The Procter & Gamble Company Consumer product composition comprising a polyethyleneglycol carrier, silicone conditioner, and particulate spacer material
WO2019121311A1 (en) * 2017-12-21 2019-06-27 Buck Group AG Fragrance additive for laundry
CN111471544A (en) * 2020-05-20 2020-07-31 广州大白生物科技有限公司 Washing gel bead containing fragrance solid and preparation method thereof

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US7681725B2 (en) 2007-02-23 2010-03-23 The Procter And Gamble Company Container with ability to transfer a material to container content
WO2011006779A1 (en) * 2009-07-16 2011-01-20 Henkel Ag & Co. Kgaa Solid, fragrance-transmitting composition having good cold-water solubility
WO2011011247A1 (en) 2009-07-20 2011-01-27 The Procter & Gamble Company Liquid fabric enhancer composition comprising a di-hydrocarbyl complex
US10301575B2 (en) 2015-04-14 2019-05-28 The Procter & Gamble Company Consumer product composition comprising a polyethylene glycol carrier with silicone particles dispersed therein
WO2018055121A1 (en) * 2016-09-26 2018-03-29 Henkel Ag & Co. Kgaa Solid particulate compositions comprising water-soluble carrier polymer and perfume
US10329519B2 (en) 2016-10-19 2019-06-25 The Procter & Gamble Company Consumer product composition comprising a polyethyleneglycol carrier, silicone conditioner, and particulate spacer material
WO2019121311A1 (en) * 2017-12-21 2019-06-27 Buck Group AG Fragrance additive for laundry
CN111471544A (en) * 2020-05-20 2020-07-31 广州大白生物科技有限公司 Washing gel bead containing fragrance solid and preparation method thereof

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GB0315946D0 (en) 2003-08-13
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BRPI0412371A (en) 2006-09-05

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