EP0918084A2 - Additive for conveyor lubricant - Google Patents

Abstract

Fatty acid derivatives of specified formula are used as additives in conveyor lubricants. The fatty acid derivatives are of formula: RC(O)X(CH2CH2O)nR' (where, R = 6-30 C fatty acid residue, which can have 1-3 carbon-carbon double bonds that can be epoxidised and subsequently converted with compounds of formula: R1O(CH2CH2O)x (where, R1 = H or 1-18 C alkyl and x = 0-50; X = O or NR''; R'' = H, (CH2CH2O)pR' or optionally 1-20 C alkyl interrupted by 1-5 O atoms or NH(CH2)mNR'''; R''' = H or (CH2CH2O)pR'; m = 1-6; p = 1-20; R' = H, 1-10 C alkyl, or (O)CR; and n = 1-20). An Independent claim is also included for a conveyor lubricant containing (in wt.%): (a1) 1-30 compound of formula (I) (A1); (b1) 0-30 complex former (B1); (c1) 1-20 fatty alcohol ethoxylate (C1); (d1) 0-25 fatty acids (D1); (e1) 0-25 further additives (E1); and (f1) an amount of amine (F1) sufficient to give the lubricant an alkaline pH; or (a2) 0.5-15 compound of formula (A2); (b2) 0.5-15 ether carboxylic acid (B2); (c2) 0.5-20 fatty alcohol ethoxylate (C2); (d2) 0-25 fatty amine (D2); (e2) 0-10 further additives (E2); and (f2) an amount of carboxylic acids (F2) sufficient to protonate the fatty amines (D2).

Description

The invention relates to the use of certain fatty acid derivatives as additives in soap-containing or synthetic chain lubricants and corresponding Chain lubricant.

In the beverage industry, for example in breweries, cleaning, filling and Labeling of bottles is mainly carried out automatically. Semi-automatic Plants transport around 2000 bottles an hour. Fully automatic Systems can handle up to 120,000 bottles an hour.

The bottles are usually transported to the bottling plants on belts, so-called "chain conveyor belts" or "plate belts", most of the time Stainless steel. These chain-like belts are secured with a chain lubricant, also called "belt lubricant", lubricated.

The chain lubricant used in breweries is preferably soaps, especially potash lubricating soaps used, which synthetic non-ionic or ionic surfactants can be added. Such chain lubricants have the disadvantage that they are particularly sensitive to water hardness. That's why most of the time Sequestering agents (complexing agents) such as ethylenediaminetetraacetic acid or Nitrilotriacetic acid or its alkali metal salts added, which the water hardness mask.

In addition to these soap-containing chain lubricants, synthetic chain lubricants have also been used developed that are soap-free. Such chain lubricants have, for example Ether carboxylic acids, fatty alcohol ethoxylates and fatty amines. You are less sensitive compared to the water hardness as the soap-containing chain lubricant.

As a rule, the chain lubricants are used as a dilute aqueous solution or suspension sprayed onto the plate tapes. As a rule, spraying takes place continuously. It can also be done discontinuously if the coefficient of friction for the transported bottles becomes too high.

A number of different chain lubricants are known.

WO 93/18120 describes clear water-soluble chain conveyor belt lubricants, the amphoteric aminocarboxylic acids and organic carboxylic acids as well Contain additives and / or auxiliary substances. The chain conveyor belt lubricants are supposed to high cleaning power, easily controllable foam behavior and high Resistance to microorganisms.

EP-B-0 044 458 describes lubricant compositions which are known as Chain lubricant can be used. They contain carboxylated nonionic Compounds composed of fatty acids in which ethylene oxide is inserted. They also contain acyl sarcosinates. The lubricants are said to be improved Properties such as good lubricity, low foaming behavior and Resistance to water hardness.

The known chain lubricants are not suitable for all applications. In particular, the reduction in the coefficient of friction is for some applications insufficient. Furthermore, the behavior of some chain lubricants when running dry and rewetting the tapes insufficient.

The object of the present invention is to provide additives for soap-containing and synthetic chain lubricants, which have the disadvantages of the known Remedy chain lubricant.

R

ein linearer oder verzweigter C_6-30-Fettsäurerest ist, der 1 bis 3 C-C-Doppelbindungen aufweisen kann, wobei die Doppelbindungen epoxidiert und anschließend mit Verbindungen der allgemeinen Formel R¹-O-(CH₂-CH₂-O)_x-H mit R¹ Wasserstoff oder C_1-18-Alkyl und x=0 bis 50 umgesetzt sein können,

X

Sauerstoff,
NR'', wobei R'' Wasserstoff, (CH₂-CH₂-O)_pR' oder ein gegebenenfalls durch 1 bis 5 Sauerstoffatome unterbrochener C_1-20-Alkylrest ist, oder NH-(CH₂-)_mNR''' ist, wobei R''' Wasserstoff oder (CH₂-CH₂-O-)_pR' ist und m den Wert 1 bis 6 hat und p einen mittleren Wert von 1 bis 20 hat,

R'

Wasserstoff, ein C_1-10-Alkylrest oder ein Rest (O)C-R ist,

n

einen mittleren Wert von 1 bis 20 hat,
oder n = 0 und X Sauerstoff ist, R die vorstehende Bedeutung hat und R' ein Rest eines Mono- oder Diglycerids ist, der als weitere Fettsäurereste Reste R oder Reste anderer natürlicher gesättigter oder ungesättigter Fettsäuren aufweisen kann,

als Additiv in seifenhaltigen oder synthetischen Kettengleitmitteln.The object is achieved according to the invention by using compounds of the general formula I. RC (O) -X- (CH ₂ -CH ₂ -O-) _n R ' in the

R

is a linear or branched C _6-30 fatty acid residue which can have 1 to 3 CC double bonds, the double bonds epoxidizing and then with compounds of the general formula R ¹ -O- (CH ₂ -CH ₂ -O) _x -H with R ^{1 can be} hydrogen or C _1-18 alkyl and x = 0 to 50,

X

Oxygen,
NR '', where R '' is hydrogen, (CH ₂ -CH ₂ -O) _p R 'or a C _1-20 alkyl radical which is optionally interrupted by 1 to 5 oxygen atoms, or NH- (CH ₂ -) _m NR'"", where R "" is hydrogen or (CH ₂ -CH ₂ -O-) _p R 'and m has the value 1 to 6 and p has an average value of 1 to 20,

R '

Is hydrogen, a C _1-10 alkyl radical or a radical (O) CR,

n

has an average value from 1 to 20,
or n = 0 and X is oxygen, R has the meaning given above and R 'is a residue of a mono- or diglyceride which may contain, as further fatty acid residues, residues R or residues of other naturally saturated or unsaturated fatty acids,

as an additive in soap-based or synthetic chain lubricants.

The compounds used according to the invention can be used both in soap-containing and can also be used in synthetic chain lubricants. In soapy Chain lubricants can partially or completely replace the complexing agent.

(a1) 1 bis 30 Gew.-% Verbindungen, wie sie vorstehend definiert sind, als Komponente A1,

(b1) 0 bis 30 Gew.-% Komplexbildner als Komponente B1,

(c1) 1 bis 20 Gew.-% Fettalkoholethoxylate als Komponente C1,

(d1) 0 bis 25 Gew.-% Fettsäuren als Komponente D1,

(e1) 0 bis 25 Gew-% weiterer Zusatzstoffe als Komponente E1,

(f1) eine Menge an Aminen, die ausreicht, um dem Kettengleitmittel einen alkalischen pH-Wert zu verleihen, als Komponente F1,
wobei die Gesamtmenge der Inhaltsstoffe 100 Gew.-% ergibt.

The object is also achieved by providing chain lubricants containing

(a1) 1 to 30% by weight of compounds as defined above as component A1,

(b1) 0 to 30% by weight of complexing agent as component B1,

(c1) 1 to 20% by weight of fatty alcohol ethoxylates as component C1,

(d1) 0 to 25% by weight of fatty acids as component D1,

(e1) 0 to 25% by weight of further additives as component E1,

(f1) an amount of amines sufficient to impart an alkaline pH to the chain lubricant, as component F1,
the total amount of ingredients being 100% by weight.

(a2) 0,5 bis 15 Gew.-% Verbindungen, wie sie vorstehend definiert sind, als Komponente A2,

(b2) 0,5 bis 15 Gew.-% Ethercarbonsäuren als Komponente B2,

(c2) 0,5 bis 20 Gew.-% Fettalkoholethoxylate als Komponente C2,

(d2) 0 bis 25 Gew.-% Fettamine als Komponente D2,

(e2) 0 bis 10 Gew.-% weiterer Zusatzstoffe als Komponente E2,

(f2) eine Menge an Carbonsäuren, die ausreicht, um die Fettamine der Komponente D2 zu protonieren, als Komponente F2,
wobei die Gesamtmenge der Inhaltsstoffe 100 Gew.-% ergibt.

In addition, the object is achieved by providing chain lubricants containing

(a2) 0.5 to 15% by weight of compounds as defined above as component A2,

(b2) 0.5 to 15% by weight of ether carboxylic acids as component B2,

(c2) 0.5 to 20% by weight of fatty alcohol ethoxylates as component C2,

(d2) 0 to 25% by weight of fatty amines as component D2,

(e2) 0 to 10% by weight of further additives as component E2,

(f2) an amount of carboxylic acids sufficient to protonate the fatty amines of component D2 as component F2,
the total amount of ingredients being 100% by weight.

• hohe Reinigungskraft
• geringer Reibbeiwert
• Verhinderung des Wachstums von Mikroorganismen
• geringe Schaumbildung
• Verhinderung der Entstehung von Spannungsrissen in PET-Material
• gute Hautverträglichkeit
• Wirksamkeit unabhängig von der Wasserqualität, insbesondere Wasserhärte
• kein Zusetzen des Sprüh- und Verteilersystems
• geringe Toxizität
• gute Filmbildung an Oberflächen
• Unempfindlichkeit gegenüber Verunreinigungen durch Lebensmittel, organische Verbindungen, Säuren oder Alkalien
• hohe Lagerstabilität, auch bei tiefen Temperaturen
• nicht korrosiv.

The chain lubricants according to the invention have the following advantages:

• high cleaning power
• low coefficient of friction
• Preventing the growth of microorganisms
• low foaming
• Prevention of stress cracks in PET material
• good skin tolerance
• Efficacy regardless of water quality, especially water hardness
• no clogging of the spraying and distribution system
• low toxicity
• good film formation on surfaces
• Insensitivity to contamination from food, organic compounds, acids or alkalis
• high storage stability, even at low temperatures
• not corrosive.

The chain lubricants according to the invention can be used for a large number of applications be used. They are preferred in the food industry, in particular used in chain and belt lubrication systems. Such tapes are particularly when filling food, preferably beverages, into glass and plastic bottles, Cans, glasses, barrels, beverage containers, paper and cardboard containers used. In addition to the main applications for filling drinks in They are also glass bottles when filled into bottles made of polyethylene terephthalate (PET) suitable.

The chain lubricants according to the invention are generally used as 0.1 up to 0.3% by weight aqueous solution or emulsion on the chain conveyor belt. This can, for example, via splash lubrication systems or automatic Belt lubrication systems take place.

The additives used according to the invention are described in more detail below.

R

ein linearer oder verzweigter C_6-30-, vorzugsweise C_8-22, insbesondere C_12-18-Fettsäurerest ist, der 1 bis 3, vorzugsweise 1 bis 2 C-C-Doppelbindungen aufweisen kann, wobei die Doppelbindungen epoxidiert und anschließend mit Verbindungen der allgemeinen Formel
R¹-O-(CH₂-O)_x-H mit R¹ Wasserstoff oder C_1-18-Alkyl und x=0 bis 50 umgesetzt sein können,

X

Sauerstoff,
NR'', wobei R'' Wasserstoff, (CH₂-CH₂-O)_pR' oder ein gegebenenfalls durch 1 bis 5, vorzugsweise 2 bis 4 Sauerstoffatome unterbrochener C_1-20-, vorzugsweise C_1-10-, insbesondere C_1-6-Alkylrest ist, oder
NH-(CH₂-)_mNR''' ist, wobei R''' Wasserstoff oder (CH₂-CH₂-O-)_pR' ist und m den Wert 1 bis 6 hat,

R'

Wasserstoff, ein C_1-10-, vorzugsweise C_1-4-Alkylrest oder ein Rest (O)C-R ist und

n und p

unabhängig einen mittleren Wert von 1 bis 20, vorzugsweise 1 bis 10, insbesondere 1 bis 6 haben.

According to one embodiment of the invention, compounds of general formula I are used in which

R

is a linear or branched C _6-30 , preferably C _8-22 , in particular C _12-18 fatty acid _residue , which can have 1 to 3, preferably 1 to 2 CC double bonds, the double bonds epoxidizing and then with compounds of the general formula
R ¹ -O- (CH ₂ -O) _x -H can be reacted with R ¹ hydrogen or C _1-18 alkyl and x = 0 to 50,

X

Oxygen,
NR '', where R '' is hydrogen, (CH ₂ -CH ₂ -O) _p R 'or a C _1-20 -, preferably C _1-10 -, in particular optionally interrupted by 1 to 5, preferably 2 to 4, oxygen atoms Is C _1-6 alkyl, or
Is NH- (CH ₂ -) _m NR ''', where R''' is hydrogen or (CH ₂ -CH ₂ -O-) _p R 'and m is 1 to 6,

R '

Is hydrogen, a C _1-10 , preferably C _1-4 alkyl radical or a radical (O) CR and

n and p

independently have an average value of 1 to 20, preferably 1 to 10, in particular 1 to 6.

The compounds of the general formula I are prepared by known processes. It is described, for example, in EP-A 0 754 667,
DE-A-19 54 00 91 or DE-A-19 60 76 42 described.

The degree of ethoxylation n can be in a mixture for different molecules to be different. Therefore an average value for n is given, which indicates how much Mol of ethylene oxide per mole of compound of general formula (I) is present in the mixture. Examples of such compounds are fatty acid amide ethoxylates with 10 ethylene oxide units and polyethylene glycol dioleate with 12 ethylene oxide units.

If X is oxygen and R 'is hydrogen or an alkyl radical, the compound used is an ethoxylated fatty acid which may be etherified at the end with an alkyl radical. In such compounds, R is preferably a C _12-24 fatty acid residue which may have 1 to 3 CC double bonds. n has a value from 1 to 20.

Examples of such compounds are C _16/18 fatty acids esterified with methyl polyethylene glycol.

If X is oxygen and R 'is a radical (O) CR, then these are polyethylene glycol diesters of fatty acids. In this case, R is preferably a C _12-24 fatty acid residue which may have 1 to 3 CC double bonds, and n has an average value of 4 to 20.

If X is a residue NR '', it is a question of fatty acid amides which have been reacted with ethylene oxide. The nitrogen atom can be reacted at a valence with ethylene oxide. In this case, R ″ is hydrogen. In addition, the amide can have a C _1-20 alkyl radical which may be interrupted by 1 to 5 oxygen atoms. It is therefore amides with primary amines, which are reacted with ethylene oxide.

Examples of suitable compounds are stearic acid, reacted with methylpolyethylene glycolamine, Isostearic acid, reacted with butylpentaglycolamine, isostearic acid, reacted with butylglycol (5EO) amine, isostearic acid, reacted with Methyl polyethylene glycolamine and fatty acid amide ethoxylates with 10 EO. EO means thereby ethylene oxide units.

In addition, R '' can be a radical (CH ₂ -CH ₂ -O-) _p R '. In this case, both valences of the amide nitrogen atom have the same ethoxylated radicals. Furthermore R '' can be a residue NH- (CH ₂ -) _m NR '''. They are therefore fatty acid amides from aliphatic diamines. Here, m has a value of 2 to 10, preferably 2 to 8, in particular 2 to 6, R '''can be hydrogen or (CH ₂ -CH ₂ -O-) _p R', that is to say the second nitrogen atom can be 2 identical radicals can be substituted. An example of a suitable amine is 2,2-aminoethylaminoethanol.

Examples of usable fatty acids are caproic acid, caprylic acid, capric acid, lauric acid, Myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid, Lignoceric acid, lauroleic acid, myrestoleic acid, palmitoleic acid, oleic acid, Gadoleic acid, brucic acid, ricinoleic acid, linoleic acid, linolenic acid, arachidonic acid, Clupanodonic acid, erucic acid and isostearic acid.

In formula IR, a linear or branched C _12-24 fatty acid residue, which can have 1 to 3 double bonds, X is preferably a residue NR ″, and n has an average value of 1 to 20.

Further compounds of the general formula I which can be used according to the invention are those in which n is 0 and X is oxygen. R has the above Meaning, and R 'is a residue of a mono- or diglyceride, which are further fatty acid residues Residues R or residues of other natural saturated or unsaturated fatty acids can have. In this case, the connections are Fatty acid triglycerides, double bonds present in the fatty acid residues such as described above can be epoxidized and reacted. Are preferred such compounds oils from at least partially unsaturated fatty acids, wherein the C-C double bonds are at least partially epoxidized as described above and implemented.

Also preferred are compounds of formula I, wherein X is oxygen and R ' Rest is (O) C-R.

Examples of oils which can be used are linseed oil, olive oil, rapeseed oil, sesame oil, soybean oil, sunflower oil, Wheat germ oil, coconut oil, palm kernel oil and turnip oil.

Soybean oil is particularly preferably used. In particular, oils become more unsaturated Fatty acids used in which the epoxidized double bonds are caused by butyl glycol +3 EO are implemented.

The compounds according to the invention can be used both in soap-containing and synthetic Chain lubricants are used.

Chain lubricant containing soap

(a1) 1 bis 30 Gew.-%, vorzugsweise 5 bis 15 Gew.-% Verbindungen der Formel I, wie sie vorstehend definiert sind, als Komponente A1,

(b1) 0 bis 30 Gew.-%, vorzugsweise 5 bis 10 Gew.-% Komplexbildner als Komponente B1,

(c1) 1 bis 20 Gew.-%, vorzugsweise 4 bis 15 Gew.-% Fettalkoholethoxylate als Komponente C1,

(d1) 0 bis 25 Gew.-%, vorzugsweise 10 bis 20 Gew.-% Fettsäuren als Komponente D1,

(e1) 0 bis 25 Gew.-%, vorzugsweise 5 bis 20 Gew.-% weiterer Zusatzstoffe als Komponente E1,

(f1) eine Menge an Aminen, die ausreicht, um dem Kettengleitmittel einen alkalischen pH-Wert zu verleihen, als Komponente F1,
wobei die Gesamtmenge der Inhaltsstoffe 100 Gew.-% ergibt.

Preferred soap-containing chain lubricants included

(a1) 1 to 30% by weight, preferably 5 to 15% by weight, of compounds of the formula I, as defined above, as component A1,

(b1) 0 to 30% by weight, preferably 5 to 10% by weight of complexing agent as component B1,

(c1) 1 to 20% by weight, preferably 4 to 15% by weight, of fatty alcohol ethoxylates as component C1,

(d1) 0 to 25% by weight, preferably 10 to 20% by weight, of fatty acids as component D1,

(e1) 0 to 25% by weight, preferably 5 to 20% by weight, of further additives as component E1,

(f1) an amount of amines sufficient to impart an alkaline pH to the chain lubricant, as component F1,
the total amount of ingredients being 100% by weight.

Fatty acid amide ethoxylates as above are preferably used as component A1 described used. Component A1 can usually contain soaps Chain lubricants partially or completely replace existing complexing agents. This applies in particular to the reaction product of isostearic acid and Butylpentaglycolamine and fatty acid amide ethoxylates with 10 EO.

All complexing agents which are suitable can be used as component B1 to reduce the water hardness. Examples of such complexing agents are ethylenediaminetetraacetic acid (EDTA), methylglycinediacetic acid (MGDA) and nitrilotriacetic acid (NTA), preferably in combination with substituted polycarboxylates.

Fatty alcohol ethoxylates which can be used as component C1 are, for example, C _13/15 fatty alcohols which have been reacted with 5 to 15, for example 8 EO. The reaction product of C ₁₃ fatty alcohol with 5 to 15, for example 8 EO, is also suitable. Other reaction products made from fatty alcohols and ethylene oxide and / or propylene oxide can also be used.

Fatty acids, for example isononanoic acid, are used as component D1.

Additional additives, such as solubilizers, can be used as component E1 Active ingredients or foam dampers can be used. Examples of more suitable Solubilizers are alcohols, polyalcohols, ethers and polyethers, in particular Isopropanol, butyl glycol, butyl diglycol and ethylene glycol ether.

Quaternary, for example, can be used as non-ionic systems as active biocidal agents Ammonium compounds are used that have at least one long-chain Have alkyl radical. Alkylaminoethylene glycols can also be used.

In addition to the fatty alcohol ethoxylates present as component C1, defoamers can also be used other fatty alcohol alkoxylates and carboxylic acid esters used become.

Amines are used as component F1, the amount being chosen so that the chain lubricant has an alkaline pH. Examples of suitable amines are alkanolamines such as triethanolamine and monoethanolamine.

(a2) 0,5 bis 15 Gew.-%, vorzugsweise 0,5 bis 12 Gew.-% Verbindungen der allgemeinen Formel 1, wie sie vorstehend definiert sind, als Komponente A2,

(b2) 0,5 bis 15 Gew.-%, vorzugsweise 0,5 bis 12 Gew.-% Ethercarbonsäuren als Komponenten B2,

(c2) 0,5 bis 20 Gew.-%, vorzugsweise 0,5 bis 15 Gew.-% Fettalkoholethoxylate als Komponente C2,

(d2) 0 bis 25 Gew.-%, vorzugsweise 1 bis 15 Gew.-% Fettamine als Komponente D2,

(e2) 0 bis 10 Gew.-%, vorzugsweise 0 bis 6 Gew.-% weiterer Zusatzstoffe als Komponente E2,

(f2) eine Menge an Carbonsäuren, die ausreicht, um die Fettamine der Komponente D2 zu protonieren, als Komponente F2,
wobei die Gesamtmenge der Inhaltsstoffe 100 Gew.-% ergibt.

Contain synthetic chain lubricants

(a2) 0.5 to 15% by weight, preferably 0.5 to 12% by weight, of compounds of the general formula 1, as defined above, as component A2,

(b2) 0.5 to 15% by weight, preferably 0.5 to 12% by weight, of ether carboxylic acids as components B2,

(c2) 0.5 to 20% by weight, preferably 0.5 to 15% by weight, of fatty alcohol ethoxylates as component C2,

(d2) 0 to 25% by weight, preferably 1 to 15% by weight, of fatty amines as component D2,

(e2) 0 to 10% by weight, preferably 0 to 6% by weight, of further additives as component E2,

(f2) an amount of carboxylic acids sufficient to protonate the fatty amines of component D2 as component F2,
the total amount of ingredients being 100% by weight.

Preferred compounds of general formula I as component A2 are above described.

Ether carboxylic acids suitable as component B2 are, for example, oleyl ether carboxylic acid to call.

Component C2 can be constructed as above component C1.

A fatty amine that can be used as component D2 is, for example, N-oleyl-1,2-diaminopropane.

The other additives of component E2 can be those of component E1 correspond.

Lower carboxylic acids in particular can be used as component F2 Carboxylic acids, for example formic acid, acetic acid or propionic acid. The chain lubricants according to the invention generally also contain Water in which they are present as a solution or emulsion. When using it diluted them with water.

In the lubricants according to the invention, the compounds of the general Formula I preferably used in combination with oleyl sarcosinate.

The chain lubricants according to the invention not only have those listed at the beginning Advantages, they also show particular advantages when rewetting dry-run Tapes. If such tapes run dry with water, so rewetting is very effective so that the coefficient of friction drops sharply. At This effect does not occur in known chain lubricants. So that the invention Chain lubricant essential when used in chain conveyor belts more tolerant of control errors if, for example, the task system closes was switched off for a long time and is put back into operation. While at conventional chain lubricants continue to increase the friction coefficients in this case, what can lead to a failure of the filling system, they decrease in the inventive Chain lubricants immediately after rewetting, so that the Risk of machine failure can be greatly reduced.

1 and 2 in the drawing are results of measurements of the coefficient of friction for Chain lubricant according to the invention specified.

The invention is explained in more detail below with the aid of examples.

Examples

The following test formulations were used:

Chain lubricant containing soap:

EDTA (40%) 30 g

C _13/15 fatty alcohol +8 EO 5 g

Isononanoic acid amide 5 g

Triethanolamine 10 g

Monoethanolamine 5 g

Oleic acid 15 g

distilled water 30 g

Synthetic chain lubricant:

Oleyl ether carboxylic acid 2 g

C ₁₃ fatty alcohol +8 EO 3 g

Acetic acid (60%) 2.6 g

N-oleyl-1,3-diaminopropane 5 g

distilled water ad 100 g

(1) Polyethylenglykoldioleat +12 EO

(2) C_16/18-Fettsäure, verestert mit Methylpolyethylenglykol

(3) Stearinsäure, umgesetzt mit Methylpolyethylenglykol(520)amin

(4) Isostearinsäure, umgesetzt mit Butylpentaglykolamin

(5) Isostearinsäure, umgesetzt mit Butyldiglykol(5 EO)

(6) Isostearinsäure, umgesetzt mit Methylpolyethylenglykol(520)amin

(7) Fettsäureamidethoxylat mit 10 EO

(8) Isononansäureamid von 2,2-Aminoethylanlinoethanol

(9) epoxidiertes Sojaöl mit Butyldiglykol +3 EO

The following compounds were used as additives of the general formula I:

(1) Polyethylene glycol dioleate +12 EO

(2) C _16/18 fatty acid esterified with methyl polyethylene glycol

(3) stearic acid reacted with methyl polyethylene glycol (520) amine

(4) Isostearic acid reacted with butylpentaglycolamine

(5) isostearic acid reacted with butyl diglycol (5 EO)

(6) Isostearic acid, reacted with methyl polyethylene glycol (520) amine

(7) Fatty acid amide ethoxylate with 10 EO

(8) isononanoic acid amide of 2,2-aminoethylanlinoethanol

(9) epoxidized soybean oil with butyl diglycol +3 EO

The above compounds were added in an amount of 2 g to the synthetic chain lubricant or soap-containing chain lubricant. The chain lubricants were tested as follows:
In a laboratory chain conveyor belt system was over a period of 120 min. a 0.1% solution of the corresponding chain lubricant is sprayed on. Then a dry run of 30 min. performed without rinsing and then sprayed with water. The coefficients of friction as well as the noise, foam formation, wetting and possible blackness of the chain belt were compared. The belt speed was 10 to 10.2 m / min. The coefficient of friction "µ" was determined as the quotient of the measured tensile stress (pressure) for a bottle by the weight of the bottle in grams. Commercial mineral water bottles with a volume of 750 ml were used as bottles. Otherwise, the rating was based on a grading scale, with grade 1 representing the worst and grade 5 the best result.

example 1

The above compounds 1 to 6 were in the synthetic chain lubricant examined, using a 0.1% aqueous solution of the chain lubricant has been. For comparison, the synthetic chain lubricant without the additive used.

FIG. 1 shows the change in the coefficient of friction as a function of time for the compounds, (4) in graph 3, (5) in graph 4, (1) in graph 2, oleyl sarcosinate as comparison in graph 1 and the comparative agent in graph 5 . R means the coefficient of friction, Z the time in minutes. The results of the band assessment after 120 min. are listed in Table 1. connection noise foam Wetting Blackening 1 3rd 3.25 3rd 4.5 2nd 3rd 1.5 3.5 4th 3rd 3.5 2.5 2.5 4.5 4th 3.5 3rd 2nd 4.5 5 2.75 2.5 2.75 4.25 6 3.5 1.5 3.5 4.5 comparison 2.5 2nd 3rd 4th Rating: grade 1 = bad, grade 5 = good.

The results show that the chain lubricant compositions according to the invention advantageously have low coefficients of friction. Show in particular Chain lubricant with compound no. 4 after dry running during rinsing with Water has good absorbency, as does chain lubricant with compound no. 5.

Example 2

The synthetic chain lubricant was used, but the N-oleyl-1,3-diaminopropane replaced by compound no. 8. The coefficient of friction decreased during the measurement from about 0.144 to 0.138. There was also a better lift of the chain lubricant on the tape and there were better results with the noise and the Chain blackening (i.e. less abrasion and less corrosion).

Example 3

In the soap-containing tape lubricant formulation, the EDTA was made by 12 g of compound No. 4 replaced. In addition, 2 g of the synthetic chain lubricant Compound No. 4 added. The results of the coefficient of friction measurement are shown in FIG. 2 shown. The coefficient of friction dropped to 0.10.

Both chain lubricants show a decrease in the coefficient of friction after Rewetting. The synthetic chain lubricant has a lower coefficient of friction than the soap-containing chain lubricant on both agents showed good results with the Density measurement and a low noise level as well as a low one Foaming.

Example 4

The synthetic chain lubricant formulation was mixed with 2 g of Compound No. 7 transferred. The coefficient of friction was significantly improved by the addition. In the soap-containing chain lubricant formulation, the EDTA was replaced by 12 g of the compound No. 7 replaced. The friction coefficients of the formulation decreased significantly.

Example 5

The synthetic chain lubricant formulation was mixed with 2 g of compound No. 9. Here, too, there was an improved wind-up behavior during rinsing. Replacing the EDTA in the synthetic chain lubricant formulation with 12 g of compound no. 7 showed a very sharp drop in the coefficient of friction to a value of approximately 0.08. When the tape was rewetted, the coefficient of friction dropped sharply.
When oleyl sarcosinate was added or the oleyl ether carboxylic acid was replaced by oleyl sarcosinate, the properties of the chain lubricants were further improved.

Claims (10)

Use of compounds of the general formula I RC (O) -X- (CH ₂ -CH ₂ -O-) _n R ' in the

R a

is a linear or branched C _6-30 fatty acid residue which can have 1 to 3 CC double bonds, the double bonds epoxidizing and then with compounds of the general formula R ¹ -O- (CH ₂ -CH ₂ -O) _x -H R ^{1 can be} hydrogen or C _1-18 alkyl and x = 0 to 50,

X

Oxygen,
NR '', where R '' is hydrogen, (CH ₂ -CH ₂ -O-) _p R 'or a C _1-20 alkyl radical which is optionally interrupted by 1 to 5 oxygen atoms, or NH- (CH ₂ -) _m NR "" is where R "" is hydrogen or (CH ₂ -CH ₂ -O-) _p R "and m has the value 1 to 6 and p has an average value of 1 to 20,

R '

Is hydrogen, a C _1-10 alkyl radical or a radical (O) CR,

n

has an average value from 1 to 20,
or n = 0 and X is oxygen, R has the meaning given above and R 'is a residue of a mono- or diglyceride which may contain, as further fatty acid residues, residues R or residues of other naturally saturated or unsaturated fatty acids,

as an additive in soap-containing or synthetic chain lubricants. Use according to claim 1, characterized in that in formula IR is a linear or branched C _8-22 fatty acid _residue which can have 1 to 3 double bonds, X is a residue NR '' and n has an average value of 1 to 10. Use according to claim 1, characterized in that in formula I X Is oxygen and R 'is a radical (O) C-R. Use according to claim 1, characterized in that the compound of formula I is an oil of at least partially unsaturated fatty acids, the CC double bonds at least partially epoxidizing and then with compounds of the general formula R ¹ -O- (CH ₂ -CH ₂ - O) _x -H are reacted with R ¹ hydrogen or C _1-18 alkyl and x = 0 to 50. Chain lubricant containing (a1) 1 to 30% by weight of compounds as defined in one of claims 1 to 4 as component A1, (b1) 0 to 30% by weight of complexing agent as component B1, (c1) 1 to 20% by weight of fatty alcohol ethoxylates as component C1, (d1) 0 to 25% by weight of fatty acids as component D1, (e1) 0 to 25% by weight of further additives as component E1, (f1) an amount of amines sufficient to impart an alkaline pH to the chain lubricant, as component F1,
the total amount of ingredients being 100% by weight. Chain lubricant containing (a2) 0.5 to 15% by weight of compounds as defined in one of claims 1 to 4 as component A2, (b2) 0.5 to 15% by weight of ether carboxylic acids as component B2, (c2) 0.5 to 20% by weight of fatty alcohol ethoxylates as component C2, (d2) 0 to 25% by weight of fatty amines as component D2, (e2) 0 to 10% by weight of further additives as component E2, (f2) an amount of carboxylic acids sufficient to protonate the fatty amines of component D2 as component F2,
the total amount of ingredients being 100% by weight. A chain lubricant according to claim 5 or 6, which further contains oleyl sarcosinate. Use of chain lubricants according to one of claims 5 to 7 in the Food industry. Use according to claim 8 in chain and belt lubrication systems. Process for lubricating chain conveyor belt systems, characterized in that that a chain lubricant according to any one of claims 5 to 7 as 0.1 to 0.3% by weight aqueous solution or emulsion on the chain conveyor belt is applied.

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