Surfactant system for detergents containing mannosylerythritol lipids (MEL) and at least one further surfactant

Abstract

A surfactant system comprising specific MEL and cosurfactants is suitable for use in washing, cleaning or textile care products and leads to increased washing performance.

Description

The present application is directed to a surfactant system which comprises specific Mannosylerythritollipide (MEL) and at least one further surfactant, wherein the further surfactant is selected from sophorolipids and / or anionic surfactants. The present application is also directed to laundry, cleaning and textile care compositions which comprise this surfactant system.The use of various surfactants in laundry, cleaning and textile care products is established in the prior art.For good washing performance, conventional surfactants such as fatty alcohol ethoxylates (FAEO), linear alkylbenzenesulfonates (LAS) and / or fatty alcohol ether sulfates (FAEOS) are usually used in washing, cleaning and textile care products. Such classical surfactants are produced from fossil raw materials or they are obtainable by a semi-fossil, semi-bio-based, so-called bio-mass-balanced process.LASs have the additional disadvantage that they are not anaerobically degradable.For reasons of sustainability, there is an increasing tendency to use bio-based surfactants in laundry, cleaning and textile care products, as a result of which so-called bio-surfactants are constantly gaining in importance. Biosurfactants are obtained from renewable raw materials and thus have an improved CO 2- footprint.A disadvantage of bio-surfactants available on the market to date is that they sometimes have different properties or interactions than conventional surfactants, which is why completely new surfactant systems have to be devised and provided.The biosurfactants which are particularly performanceable because of their hydrophobicity include the Mannosylerythritollipide (MEL) which are obtained by fermentation from various microorganisms and are currently being investigated, above all, with regard to their use in cosmetic agents. It is desirable to use this class of biosurfactant also in detergents and cleaners and to replace other, ecologically less favorable surfactants as far as possible. However, such detergents have hitherto exhibited only a very low and unsatisfactory washing performance. There was therefore a desire to increase the washing performance of MEL-containing detergents.Surprisingly, it has now been found that the combination of specific MEL with sophorolipids and / or anionic surfactants leads to a significantly improved washing performance, in particular with respect to greasy stains.The present application therefore relates first to a surfactant system comprising a) a mannosylerythritol lipid (MEL) of the general formula (I) in which• R 1 and R 2 independently of one another, are saturated or unsaturated acyl groups having 4 to 16 carbon atoms,• R 3 and R 4 independently of one another, are H or an acetyl group, andb) at least one further surfactant selected from (i) sophorolipids (ii) anionic surfactants.The invention further provides a washing, cleaning or textile care composition based on the surfactant system a)+b).The invention still further provides a method for cleaning and / or caring for textiles, in which an agent containing this surfactant system is used.The invention still further provides for the use of a surfactant system according to the invention for increasing the washing performance of a washing, cleaning or textile care composition.The present invention and preferred embodiments of the present invention are characterized by the following statements: 1. surfactant system comprisingat least one mannosylerythritol lipid (MEL) of the general formula (I) in which R 1 and R 2 independently of one another represent saturated or unsaturated acyl groups having 4 to 16 carbon atoms, R 3 and R 4 independently of one another represent H or an acetyl group, andb. at least one further surfactant selected from (i) sophorolipids (ii) anionic surfactants.2. Surfactant system according to Statement 1, comprising MEL of the formula (I) in which at least one of the radicals R 1 or R 2 bears at least one double bond in the carbon chain. 3. surfactant system according to one of statements 1 or 2, comprising MEL according to formula (I) wherein R 1 and R 2 are C 8- C 12- acyl groups. 4. surfactant system according to any of Statements 1 to 3, comprising MEL of formula (I) in which R 1 and R 2 are C 10- acyl groups. 5. surfactant system according to any of Statements 1 to 4, comprising MEL according to formula (I) in which R 1 is a saturated C 10- acyl group and R 2 is a monounsaturated C 10- acyl group. 6.Surfactant system according to either of Statements 1 and 2, comprising MEL of the formula (I) in which one of the radicals R 1 and R 2 is a C 12- C 16- acyl group and the other is a C 4- C 8- acyl group. 7. surfactant system according to claim 6, comprising MEL according to formula (I) wherein R 1 is a saturated C 4- acyl group and R 2 is a monounsaturated C 16- acyl group. 8. surfactant system according to any of Statements 1 to 7, comprising as sophorolipid b)(i) at least one compound of the formulae (II) below in which R 1, R 2, R 3 and R 4 independently of one another are H or an acetyl group. 9. surfactant system according to any of Statements 1 to 7, comprising, as anionic surfactant b)(ii), alkali metal or ammonium salts of the following compounds i.-xiv.i. linear or branched C 10- C 16- alkyl sulfates ii. linear or branched C 10- C 16- alkyl(ether) sulfates having 1-4 ethoxy groups iii. ethercarboxylic acids of the formula R-O-(CH 2- CH 2 O) x- CH 2- COOH, in which R is a linear or branched, The saturated or unsaturated alkyl group having 8 to 30 carbon atoms and x=0 or 1 to 16 is iv. sulfo-C 10- C 16- alkylates v. C 10- C 16- alkylmethyl taurates vi. C 8- C 24- acyl sarcosides vii. C 8- C 24- acyl glutamates viii. C 8- C 24- acyl glycinates ix. C_NER58-C_NER59-acyl aspartates x. linear or branched di-C 6- C 20- alkyl sulfosuccinates xi. linear or branched C 6- C 20- alkyl (polyglycol ether) sulfosuccinates xii. C 10- C 16- alkyl methyl isethionates xiii. alpha-olefin sulfonates xiv. linear C 10- C 16- alkyl benzene sulfonates and / or xv. any desired mixtures of i. - xiv. 10th surfactant system according to statement 9, comprising as anionic surfactant b)(ii) at least one anionic surfactant which carries a -SO 3 H- or a -SO 3 M- group, where M is an alkali metal or ammonium cation. 11.Surfactant system according to either of Statements 9 and 10, comprising, as anionic surfactant b)(ii), alkali metal or ammonium salts of sulfo-C 10- C 16- alkylates, linear or branched di-C 6- C 20- alkyl sulfosuccinates, linear or branched C 6- C 20- alkyl (polyglycol ether) sulfosuccinates, C 10- C 16- alkyl methyl taurates or any desired mixtures thereof. 12.Surfactant system according to one of Statements 9 to 11, comprising an alkali metal or ammonium salt of dihexylsulfosuccinate, in particular the compound known under the INCI name dihexyl sodium sulfosuccinate. 13.Surfactant system according to one of Statements 9 to 11, comprising alkali metal or ammonium salts of sulfolaurate, in particular the compound known under the INCI name Disodium 2-sulfolaurate. 14. surfactant system according to any of Statements 9 to 11, comprising alkali metal or ammonium salts of lauryl sulfosuccinate, in particular the compound known under the INCI name Disodium lauryl sulfosuccinate. 15. surfactant system according to any of Statements 9 to 11, comprising alkali metal or ammonium salts of C 10- C 16- alkylmethyl taurates, in particular the compound known under the INCI name sodium methyl cocoyl taurate. 16.Surfactant system according to one of the preceding statements, comprising MEL a) in a proportion by weight of 5 to 90% by weight, more preferably of 10 to 75% by weight and in particular of 25 to 60% by weight, based on the total weight of the surfactant system. 17. surfactant system according to any of the preceding statements, comprising the at least one further surfactant b) in a proportion by weight of 10 to 75 wt %, more preferably of 25 to 75 wt % and in particular of 40 to 75 wt %, based on the total weight of the surfactant system. 18. washing, cleaning or textile care compositions comprising a surfactant system according to any of the preceding statements. 19.Washing, cleaning or textile care composition according to statement 18, comprising the surfactant system in a proportion by weight of 1 to 35% by weight, more preferably 5 to 30% by weight and in particular 10 to 25% by weight, based on the total weight of the washing, cleaning or textile care composition. 20.Laundry, cleaning or textile care compositions according to either of Statements 18 and 19, comprising at least one further active compound, preferably selected from the group comprising one or more further surfactants, builders (builders), bleaches, bleach activators, enzymes, electrolytes, pH adjusters, perfumes, perfume carriers, fluorescent agents, dyes, hydrotropes, foam inhibitors, antiredeposition agents, graying inhibitors, soil release polymers, anti-shrink agents, anti-crease agents, dye transfer inhibitors, antimicrobial active compounds, solvents, germicides, fungicides, antioxidants, preservatives, corrosion inhibitors, antistatics, bitter agents, ironing auxiliaries, repellents and impregnating agents, skin care active compounds, anti-swell agents and anti-slip agents, These components also contain plasticizing components and UV absorbers. 21.Single dose comprising a washing, cleaning or textile care composition according to any one of claims 18 to 20 in a water-soluble envelope, in particular a water-soluble envelope made of a water-soluble film material, wherein the water-soluble film material preferably contains polyvinyl alcohol or a polyvinyl alcohol copolymer. 22.A method for cleaning and / or care textiles, comprising the method steps a. providing a wash solution comprising a washing, cleaning or textile care composition according to any of Specifications 18 to 21 b. contacting a textile with the wash solution according to a. 23.Use of a surfactant system according to any of Specifications 1 to 17 to improve the washing performance of a washing, cleaning or textile care composition.These and other aspects, features and advantages of the invention will become apparent to those skilled in the art from a study of the following detailed description and claims. Any feature of one aspect of the invention may be used in any other aspect of the invention. Further, it is to be understood that the examples herein are intended to describe and illustrate the invention, but not to limit it, and in particular the invention is not limited to these examples.Unless otherwise stated, all percentages are % by weight, based on the total weight of the agent / composition.Numerical ranges indicated in the format "from x to y" include the above values. When several preferred numerical ranges are specified in this format, it is understood that all ranges arising from the combination of the various endpoints are also detected."At least one" as used herein refers to 1, 2, 3, 4, 5, 6, 7, 8, 9, or more. In the context of ingredients of the compositions described herein, this indication does not refer to the absolute amount of molecules but to the type of ingredient. "At least one anionic surfactant" therefore means, for example, one or more different anionic surfactants, i.e. one or more different types of anionic surfactants. Together with quantities, the quantities refer to the total quantity of the correspondingly designated type of constituent.As a first constituent, the surfactant system of the invention comprises an Mannosylerythritollipid. Mannosylerythritollipide (MEL) are surfactants consisting of a hydrophilic portion, the 4-O-β-D-mannopyranosyl meso-erythritol, and a plurality of hydrophobic portions which are fatty acid chains and different degrees of acetylation. They are obtained by fermentation from various microorganisms, especially from yeasts such as Pseudozyme antarctica-also called Candida arcica or Mesosziomyces. Other microorganisms which can be used for the production of MEL are Pseudozyma sp., but also from Ustilago maydis. The fungi of the Ustilaginaceae family, such as, for example, Moesziomyces aphidis(Front, are also particularly suitable for fermentation. Bioeng. Biotechnol.., 17 May 2022; Sec. Industrial Biotechnology; Volume 10-2022). On account of their origin, they are included in the so-called biosurfactants. The MELs used according to this invention are of formula (I) below, wherein R 1 and R 2 independently of each other, are saturated or unsaturated acyl groups having 4 to 16 carbon atoms, R 3 and R 4 independently of each other, are H or an acetyl group (Ac).Suitable MELs for the purposes of the present invention usually comprise mixtures of MEL-A: R 1= R 2= Ac MEL-B: R 1= Ac, R 2= H MEL-C: R 1= H, R 2= Ac MEL-D: R 1= R 2= H.A particularly good synergism of the surfactants a) and b) with respect to an improved washing performance could be observed if the degree of acetylation in the MELs according to formula (I) is higher (MEL-A, MEL-B, MEL-C).It has furthermore been found that the aforementioned synergism is greater if MEL according to formula (I) comprises acyl radicals R 1 and R 2 in which at least one of the radicals bears a double bond in the acyl chain.A particularly significant synergism of the surfactants a) and b) was found when the radicals R 1 and R 2 stand for acyl chains of medium chain lengths having 8-12 and in particular 10 carbon atoms.In a preferred embodiment, the surfactant system comprises MEL of the formula (I) in which at least one of the radicals R 1 or R 2 bears at least one double bond in the carbon chain.In a further preferred embodiment, the surfactant system comprises MEL of formula (I) wherein R 1 and R 2 are C 8- C 12- acyl groups, very particularly preferably C 10- acyl groups. A very particularly preferred embodiment is characterized in that the surfactant system comprises MEL according to formula (I) wherein R 1 is a saturated C 10- acyl group and R 2 is a monounsaturated C 10- acyl group.In a further preferred embodiment, the surfactant system comprises MEL of formula (I) wherein one of the radicals R 1, R 2 is C 12- C 16- acyl group and the other is a C 4- C 8- acyl group.A very particularly preferred embodiment is characterized in that the surfactant system comprises MEL according to formula (I) wherein R 1 is a saturated C 4- acyl group and R 2 is a monounsaturated C 16- acyl group.The surfactant system according to the invention contains MEL a) preferably in a proportion by weight of 5 to 90 wt %, more preferably 10 to 75 wt % and in particular 25 to 60 wt %, based on the total weight of the surfactant system.The surfactant system particularly preferably comprises MEL of the formula (I) in which R 1 is a saturated C 10- acyl group and R 2 is a monounsaturated C 10- acyl group, in the abovementioned amounts.As a second constituent, the surfactant system comprises at least one further surfactant b) which can be selected from (i) sophorolipids and / or (ii) anionic surfactants.Sophorolipids are glycolipid surface active compounds which can be synthesized by a selected number of non-pathogenic yeast species and which include biosurfactants.The sophorolipids suitable according to this invention preferably conform to one of the following formula (II) wherein R 1, R 2, R 3 and R 4 independently of one another represent H or an acetyl group.Suitable anionic surfactants b)(ii) are anionic surfactants which contain at least one water-solubilizing anionic group, for example a carboxylate, sulfate, sulfonate or phosphate group, and at least one lipophilic alkyl group having about 8 to 30 C atoms. In addition, glycol or polyglycol ether groups, ester, ether and / or amide groups and hydroxyl groups may be present in the molecule.Preferred anionic surfactants b)(ii) which can be combined as cosurfactant with MEL a) include alkali metal or ammonium salts of i. linear or branched C 10- C 16- alkyl sulfates ii. linear or branched C 10- C 16- alkyl (ether) sulfates having 1-4 ethoxy groups iii. ether carboxylic acids of the formula R-O-(CH 2- CH 2 O) x- CH 2- COOH in which R is a linear or branched, The saturated or unsaturated alkyl group having 8 to 30 carbon atoms and x=0 or 1 to 16 is iv. sulfo-C 10- C 16- alkylates v. C 10- C 16- alkylmethyl taurates vi. C 8- C 24- acyl sarcosides vii. C 8- C 24- acyl glutamates viii. C 8- C 24- acyl glycinates ix. C_NER145-C_NER146-acyl aspartates x. linear or branched di-C 6- C 20- alkyl sulfosuccinates xi. linear or branched C 6- C 20- Alkyl(polyglycolether)sulfosuccinaten xii. C 10- C 16- alkyl methyl isethionates xiii. alpha-olefin sulfonates xiv. linear C 10- C 16- alkyl benzene sulfonates and / or xv. any mixtures of i.-xiv.The improved washing performance of the surfactant mixture according to the invention is associated with a synergistic effect of the surfactants a)+b), which leads to a lowering of the interfacial tension. In the case of MEL a) having high acetylation levels and two C10radicals, of which one preferably carries at least one double bond, the synergistic effect is particularly pronounced.In contrast to other nonionic surfactants, the specific MEL a) are distinguished by particularly rapid diffusion at the interface.Very good synergy effects could be achieved with surfactant systems according to the invention in which MEL a) of the formula (I) were combined with the following surfactants b):Sophorolipidsalkyl sulfatessulfoalkylatestauratessulfo(di)succinatesisethionates.The surfactant system according to the invention contains the at least one surfactant b) preferably in a proportion by weight of 10 to 75 wt %, more preferably of 25 to 75 wt % and in particular of 40 to 75 wt %, based on the total weight of the surfactant system.The surfactant system particularly preferably comprises sophorolipids, alkyl sulfates, sulfoalkylates, taurates, sulfo(di)succinates, isethionates or any mixtures thereof in the aforementioned amounts.Preferred embodiments of the surfactant system according to the invention are characterized by MEL a) of the formula (I) which have been combined with the following surfactants b): (i) at least one sophorolipid and / or (ii) at least one anionic surfactant which carries a -SO 3 H- or a -SO 3 M- group, where M is an alkali metal or ammonium cation.Within this embodiment, anionic surfactants b)(ii) are very particularly preferred, which are selected from alkali metal or ammonium salts of sulfo-C 10- C 16- alkylates, linear or branched di-C 6- C 20- alkyl sulfosuccinates, linear or branched C 6- C 20- Alkyl(polyglycolether)sulfosuccinaten C 10- C 16- alkyl methyl taurates or any mixtures thereof.Particular preference is given to alkali metal or ammonium salts ofdihexylsulfosuccinates, in particular the compound known under the INCI name dihexyl sodium sulfosuccinatessulfolaurate, especially the compound known under the INCI name Disodium 2-sulfolauratelauryl sulfosuccinate, especially the compound known under the INCI name Disodium lauryl sulfosuccinateC 10- C 16- alkylmethyl taurates, in particular the compound known under the INCI name sodium methyl cocoyl taurates.The surfactant system according to the invention can advantageously be incorporated into washing, cleaning and textile care compositions.The present application therefore further provides a washing, cleaning or textile care composition which comprises a surfactant system as described above.The surfactant system is preferably present in an amount of 1 to 35 wt %, preferably in an amount of 5 to 30 wt %, and in particular in an amount of 10 to 25 wt %, in each case based on the total agent.In addition to the surfactant system, the washing, cleaning or textile care composition preferably comprises at least one further active ingredient, preferably selected from the group comprising one or more further surfactants, builders (builders), bleaches, bleach activators, enzymes, electrolytes, pH adjusters, perfumes, perfume carriers, fluorescent agents, dyes, hydrotropes, foam inhibitors, antiredeposition agents, graying inhibitors, soil release polymers, anti-shrink agents, anti-crease agents, dye transfer inhibitors, antimicrobial active ingredients, solvents, germicides, fungicides, antioxidants, preservatives, corrosion inhibitors, antistatics, bittering agents, ironing auxiliaries, repellents and impregnating agents, skin care active ingredients, anti-swell and anti-slip agents, Plasticizing components and UV absorbers.In addition to the surfactants already mentioned above, further nonionic surfactants can also be used as further surfactants. These include, for example, alkoxylated C10-C24fatty alcohols, alkoxylated fatty acid alkyl esters, fatty acid amides, alkoxylated fatty acid amides, polyhydroxy fatty acid amides, alkylphenol polyglycol ethers, amine oxides, alkyl polyglycosides and mixtures thereof.Zwitterionic or amphoteric surfactants can also be used, for example betaines, sulfobetaines or amphoacetates.Cationic surfactants can likewise be used, for example quaternary ammonium compounds, in particular esterquats.In a preferred embodiment, however, the washing, cleaning or textile care composition is free of cationic or amphoteric surfactants.A washing, cleaning or textile care composition according to the invention preferably comprises at least one water-soluble and / or water-insoluble, organic and / or inorganic builder. Water-soluble organic builder substances include polycarboxylic acids, in particular citric acid and sugar acids, monomeric and polymeric aminopolycarboxylic acids and salts thereof, in particular glutamic acid-N,N-diacetic acid (GLDA), methyl glycine diacetic acid (MGDA), nitrilotriacetic acid (NTA), iminodisuccinates such as ethylenediamineN,N'-disuccinic acid (EDDS) and hydroxyiminodisuccinates (HIDS), ethylenediaminetetraacetic acid (EDTA) and polyaspartic acid, polyphosphonic acids, in particular aminotris(methylenephosphonic acid), ethylenediaminetetrakis(methylenephosphonic acid), lysinetetra(methylenephosphonic acid) and 1-hydroxyethane1,1-diphosphonic acid, polymeric hydroxy compounds such as dextrin and polymeric (poly)carboxylic acids, in particular polycarboxylates, polymeric acrylic acids obtainable by oxidation of polysaccharides, and also polymeric carboxylic acids, Methacrylic acids, maleic acids and mixed polymers thereof, which may also contain small amounts of polymerizable substances without carboxylic acid functionality in copolymerized form. The relative average molecular weight of the homopolymers of unsaturated carboxylic acids is generally between 5,000 g / mol and 200,000 g / mol, that of the copolymers between 2,000 g / mol and 200,000 g / mol, preferably 50,000 g / mol to 120,000 g / mol, in each case based on free acid. A particularly preferred acrylic acid-maleic acid copolymer has an average molecular weight of 50,000 to 100,000. Suitable, although less preferred, compounds of this class are copolymers of acrylic acid or methacrylic acid with vinyl ethers, such as vinyl methyl ethers, vinyl esters, ethylene, propylene and styrene, in which the proportion of the acid is at least 50% by weight. Water-soluble organic builder substances which can furthermore also be used are terpolymers which comprise two unsaturated acids and / or salts thereof as monomers and vinyl alcohol and / or a vinyl alcohol derivative or a carbohydrate as third monomer.Suitable water-soluble inorganic builder materials are polyphosphates, preferably sodium triphosphate, and the water-soluble crystalline and / or amorphous alkali metal silicate builders. In a preferred embodiment, however, the washing, cleaning or textile care products according to the invention are phosphate-free.The water-insoluble inorganic builder materials used are, in particular, crystalline or amorphous, water-dispersible alkali metal aluminosilicates. Among these, preferred are the detergent grade crystalline sodium aluminosilicates, especially zeolite A, zeolite P, and zeolite MAP and optionally zeolite X.Bleaching agents which can be used are all substances which destroy or absorb dyes by oxidation, reduction or adsorption and thereby decolor materials. These include, inter alia, hypohalite-containing bleaches, hydrogen peroxide, perborate, percarbonate, peroxoacetic acid, diperoxoazelaic acid, diperoxododecanedioic acid and oxidative enzyme systems.The washing, cleaning or textile care composition may further comprise one or more enzymes. In principle, in this regard, all enzymes established in the prior art for these purposes can be used. Preferably, it is one or more enzymes which can display a catalytic activity in a washing agent, in particular a protease, amylase, lipase, cellulase, hemicellulase, mannanase, pectin-cleaving enzyme, tannase, xylanase, xanthanase, β-glucosidase, carrageenanase, perhydrolase, oxidase, oxidoreductase and mixtures thereof. Preferred hydrolytic enzymes include in particular proteases, amylases, in particular a-amylases, cellulases, lipases, hemicellulases, in particular pectinases, mannanases, b-glucanases, and mixtures thereof. Proteases, amylases and / or lipases and mixtures thereof are particularly preferred and proteases are very particularly preferred. These enzymes are in principle of natural origin; starting from the natural molecules, improved variants are available for use in detergents, which are correspondingly preferably used. The enzymes can be adsorbed on carriers and / or embedded in coating substances in order to protect them against premature inactivation. The enzymes to be used can also be formulated together with accompanying substances, for example from fermentation, or with stabilizers.To establish a desired pH value which is not automatically obtained by mixing the remaining components, the agents according to the invention can contain acids which are compatible with the system and are environmentally compatible, in particular citric acid, acetic acid, tartaric acid, malic acid, lactic acid, amino acids such as glycine, glutamic acid, arginine and / or aspartic acid, glycolic acid, maleic acid, fumaric acid, salicylic acid, succinic acid, glutaric acid and / or adipic acid, but optionally also mineral acids, in particular sulfuric acid, or bases, in particular ammonium or alkali metal hydroxides.Graying inhibitors have the task of keeping the dirt detached from textile fibers suspended in the liquor. Water-soluble colloids, usually of organic nature, are suitable for this purpose, for example starch, glue, gelatin, salts of ethercarboxylic acids or ethersulfonic acids of the starch or of the cellulose or salts of acidic sulfuric esters of the cellulose or of the starch. Water-soluble polyamides containing acidic groups are also suitable for this purpose. Furthermore, starch derivatives other than those mentioned above may be used, for example aldehyde starches. Preference is given to using cellulose ethers, such as carboxymethylcellulose (Na salt), methylcellulose, hydroxyalkylcellulose and mixed ethers, such as methylhydroxyethylcellulose, methylhydroxypropylcellulose, methylcarboxymethylcellulose and mixtures thereof.Furthermore, soil release polymers or soil release polymers, so-called SRPs, may be present. As SRPs, it is possible in particular to use oligoesters obtainable preferably from terephthalic acid, isophthalic acid, sulfoisophthalic acid and / or methyl esters thereof, aliphatic dicarboxylic acids (saturated and / or unsaturated), for example adipic acid, and / or anhydrides thereof, aliphatic substituted dicarboxylic acids, for example nonylsuccinic acid, alkylene glycols (ethylene glycol, 1,2-propylene glycol, 1,2-butylene glycol), polyethylene glycols, alkylpolyethylene glycols, polyethylene glycol benzoic acid esters, polyethylene glycol sulfobenzoic acid esters and also, if appropriate, alkanolamines. Preferred polymers are those based on terephthalate-PEG, as are commercially available under the trade name Texcare® for example. Alternatively, (co)polymers based on polyethyleneimine, polyvinyl acetate and polyethylene glycol can also be used.Suitable soil release polymers are generally already sufficiently known from the prior art. In particular, therefore, all polymers known in the prior art for this purpose can be used.In order to effectively suppress dye separation and / or dye transfer to other fabrics during washing and / or cleaning of dyed fabrics, the composition of the present invention may contain a dye transfer inhibitor (DTI). It is preferred that the color transfer inhibitor is a polymer or copolymer of cyclic amines such as vinylpyrrolidone and / or vinylimidazole. Suitable polymers include polyvinylpyrrolidone (PVP), polyvinylimidazole (PVI), copolymers of vinylpyrrolidone and vinylimidazole (PVP / PVI), polyvinylpyridine N-oxide, poly-N-carboxymethyl-4-vinylpyridium chloride, and mixtures thereof. Particular preference is given to using polyvinylpyrrolidone (PVP), polyvinylimidazole (PVI) or copolymers of vinylpyrrolidone and vinylimidazole (PVP / PVI) as dye transfer inhibitor.Suitable antiredeposition agents are in particular polycarboxylates. Suitable materials are obtainable by the polymerization or copolymerization of unsaturated carboxylic acid monomers, such as, for example, acrylic acid, maleic acid (or anhydride), fumaric acid, itaconic acid, aconitic acid, mesaconic acid, citraconic acid and methylmalonic acid. Particularly preferred are acrylate polymers and acrylic / maleic acid copolymers.As optical brighteners, the washing, cleaning or textile care products can contain, for example, derivatives of diaminostilbenedisulfonic acid or alkali metal salts thereof. However, color detergents are preferably free of optical brighteners. Suitable salts are, for example, salts of 4,4'-bis(2-anilino-4-morpholino-1,3,5-triazinyl-6-amino)stilbene-2,2'-disulfonic acid or compounds of similar structure which carry a diethanolamino group, a methylamino group, an anilino group or a 2-methoxyethylamino group instead of the morpholino group. Furthermore, brighteners of the substituted diphenyl styryl type may be present, for example the alkali metal salts of 4,4'-bis(2-sulfostyryl) diphenyl, 4,4'-bis(4-chloro-3-sulfostyryl) diphenyl or 4-(4-chlorostyryl)-4'-(2-sulfostyryl) diphenyl. Mixtures of the above-mentioned optical brighteners can also be used.Particularly when used in machine processes, it may be advantageous to add customary foam inhibitors to laundry, cleaning or textile care products. Suitable foam inhibitors are, for example, soaps of natural or synthetic origin which have a high proportion of C18-C24 fatty acids. Suitable nonsurfactant-type foam inhibitors are, for example, organopolysiloxanes and mixtures thereof with microfine, optionally silanized silica and also paraffins, waxes, microcrystalline waxes and mixtures thereof with silanized silica or bisfatty acid alkylenediamides. Mixtures of different foam inhibitors are also used with advantages, for example those of silicones, paraffins or waxes. The foam inhibitors, in particular silicone- and / or paraffin-containing foam inhibitors, are preferably bound to a granular carrier substance which is soluble or dispersible in water. In particular, mixtures of paraffins and bistearylethylene diamide are preferred.The washing, cleaning or textile care composition can be present in any known formulation form, for example solid, liquid, gel-like, pasty, as powder, as granules or as tablet. Liquid agents contain solvents. In a preferred embodiment, the principal solvent is water. In addition, nonaqueous solvents can be added to the agent. Suitable nonaqueous solvents include monohydric or polyhydric alcohols, alkanolamines or glycol ethers, provided they are miscible with water in the stated concentration range. The solvents are preferably selected from ethanol, n-propanol, i-propanol, butanols, glycol, propanediol, butanediol, methylpropanediol, glycerol, diglycol, propyl diglycol, butyl diglycol, hexylene glycol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol propyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, methoxytriglycol, ethoxytriglycol, butoxytriglycol, 1-butoxyethoxy-2-propanol, 3-methyl-3-methoxybutanol, propylene glycol t-butyl ether, di-n-octyl ether and mixtures of these solvents. Particular preference is given to using an alcohol, in particular ethanol and / or glycerol.To further improve the stability of the compositions, hydrotropes can be used in addition to the surfactant systems described herein. The term "hydrotrope" as used in connection with the present invention refers to additives or solvents which act to increase the water solubility of poorly soluble (hydrophobic) organic compounds. In this case, a second component (i.e. the hydrotrope) is added to the sparingly soluble substance, but this is not a solvent itself. Such hydrotropes have hydrophilic and hydrophobic structural units (such as surfactants) but without the tendency to aggregate in water (as opposed to surfactants). In various embodiments, these hydrotropes do not have micellar forming activity or the critical micellar concentration (CMC) is greater than 10 -4 mol / L, preferably greater than 10 -3 mol / L, and more preferably 10 -2 mol / L. The "critical micellar concentration" is, consistent with the general understanding in the art, the concentration of the corresponding species over which it begins to form micelles and any other molecule added to the system transitions to the micelles. The hydrotropes used typically have a molecular weight <10,000 g / mol, preferably < 2500 g / mol, more preferably < 1000 g / mol and most preferably < 500 g / mol. They can be selected, for example, from short-chain mono-, di-, tri-, tetra- or penta-alkylbenzenesulfonates, in particular C 1-6 alkylbenzenesulfonates, where the alkyl groups can be linear or branched, including but not limited to cumenesulfonate, toluenesulfonate and / or xylenesulfonate, and butyl glycol, propylene glycol, 3-methoxy-3-methyl-1-butanol, 2,2-dimethyl-4-hydroxymethyl-1,2-dioxolane, propylene carbonate, butyl lactate, 2-isobutyl-2-methyl-1,3-dioxolane-4-methanol or mixtures thereof. The hydrotropes are preferably used in a range from 0.1 to 5% by weight, more preferably from 1 to 2% by weight, based on the total weight of the detergents.In one embodiment, the washing, cleaning or textile care composition is offered as a single dose pre-portioned in a water-soluble casing. The water-soluble envelope is preferably formed by a water-soluble sheet material.Such single cans can be made either by vertical form fill sealing (VFFS) methods or thermoforming methods. The thermoforming process generally includes forming a first layer of a water-soluble film material to form protrusions for receiving a composition therein, filling the agent into the protrusions, covering the protrusions filled with the agent with a second layer of a water-soluble film material, and sealing the first and second layers together at least about the protrusions.The water-soluble wrapper is preferably formed from a water-soluble sheet material selected from the group consisting of polymers or polymer blends. The wrapper may be formed from one or two or more layers of the water soluble sheet material. The water-soluble film material of the first layer and the further layers, if present, may be the same or different. The single dose comprising the washing, cleaning or textile care composition and the water-soluble casing may also have one or more compartments. The agent may be contained in one or more compartments, if present, of the water soluble enclosure. The amount of detergent preferably corresponds to the full or half dose required for one wash cycle.It is preferred that the water-soluble coating contains polyvinyl alcohol or a polyvinyl alcohol copolymer. In addition, polymers selected from the group comprising acrylic acid-containing polymers, polyacrylamides, oxazoline polymers, polystyrenesulfonates, polyurethanes, polyesters, polyethers, polylactic acid and / or mixtures of the above polymers can be added to the film material.Preferred polyvinyl alcohol copolymers comprise, in addition to vinyl alcohol, dicarboxylic acids as further monomers. Suitable dicarboxylic acids are itaconic acid, malonic acid, succinic acid and mixtures thereof, with itaconic acid being preferred.The single dose can have a substantially dimensionally stable spherical, rotationally ellipsoidal, cubic, rectangular or pillow-shaped configuration with a circular, elliptical, square or rectangular basic shape.Furthermore, it can have one or more chambers for storing one or more means. If the water-soluble packaging has two or more compartments, the two compartments can each contain a solid part-composition or a liquid part-composition, or else one or more compartments contain solid compositions and one or more further compartments contain liquid compositions.The invention further provides a method for cleaning and / or caring for textiles, comprising the method steps: a) providing a wash solution comprising a washing, cleaning or textile caring agent according to the invention and b) contacting a textile with the wash solution according to a).These include both manual and machine methods, machine methods being preferred.The invention still further provides for the use of a surfactant system according to the invention for increasing the cleaning performance of a washing, cleaning or textile care composition.Exemplary Embodiments:Increase in Washing PerformanceIn a high-throughput washing apparatus, the washing performance of various surfactant systems composed of MEL according to the invention and various cosurfactants b) was investigated at 30° C. and pH 8, 14° dH. The wash results were performed in a 50 ml wash solution, considering only the surfactant system (not the overall formulation).The surfactant concentration is identical to the dosage used in a washing machine (0.5 g / L).A total of 10 different stains (3x lipstick, pigment / oil, 3x pigment / (skin) tallow, olive oil / pigment, mayonnaise / pigment, deep-frying fat / pigment) on cotton or polyester-cotton mixed fabric were used.After drying, the reflectance values of the washed fabrics were determined and added. The results are given in the following table as mean values of triplicate determinations of the ten different stains.The wash performance of the individual substances was compared with the mixtures to show synergies.The better the spot is removed, the higher the y value (remission value).The evaluation lists the sum of the y values of the 10 stains.Surfactant systems (0%, 10%, 25%, 50%, 100% MEL with 100%, 90%, 75%, 50% and 0% of the respective surfactant b))0% MEL*48750650749148750651548410% MEL*49151751651251552225% MEL*53251950% MEL*522525537520522n n538523100% MEL*495,75*MEL according to formula (I) wherein R 1 = saturated C 10- acyl group; R 2 = monounsaturated C 10- acyl group*1Sophorolipid*2Sodium lauryl ether sulfate sulfate*3Sodium methyl cocoyl taurate*4Disodium laureth sulfosuccinates*5Disodium 2-sulfolaurates*6Sodium cocoyl isethionates*7Sodium lauryl sulfate*8Sodium dihexyl sulfosuccinatesIt is found that all surfactant combinations a)+b) tested show a synergism with respect to the washing performance.While the washing performance of sophorolipids is initially only moderately improved with an addition of 10% by weight of MEL according to the invention (based on the total surfactant system of SL and MEL), the synergism is particularly high with 50% by weight of sophorolipids and 50% by weight of MEL.In the case of DSLS, DSSL and SDHS, the synergism with respect to washing performance is already high from a proportion of 10% by weight of MEL, and in the case of SDHS and SDS, a strong synergism is evident from a proportion of 10% by weight of MEL.

Claims

Surfactant system comprising a) at least one mannosyl erythritol lipid (MEL) of the general formula (I) wherein R 1 and R 2 independently of one another, represent saturated or unsaturated acyl groups having 4 to 16 carbon atoms, R 3 and R 4 independently of one another, represent H or an acetyl group, and b) at least one further surfactant selected from (i) sophorolipids (ii) anionic surfactants.Surfactant system according to Claim 1, comprising MEL of the formula (I) in which at least one of the radicals R 1 or R 2 bears at least one double bond in the carbon chain.Surfactant system according to either of Claims 1 and 2, comprising MEL of the formula (I) in which R 1 and R 2 are C 8- C 12- acyl groups.Surfactant system according to any one of claims 1 to 3, comprising MEL according to formula (I) wherein R 1 is a saturated C 10- acyl group and R 2 is a monounsaturated C 10- acyl group.Surfactant system according to one of Claims 1 to 4, comprising as sophorolipid b)(i) at least one compound of the formulae (II) below, in which R 1, R 2, R 3 and R 4 independently of one another are H or an acetyl group.Surfactant system according to any of Claims 1 to 4, comprising as anionic surfactant b)(ii) at least one anionic surfactant which bears a -SO 3 H- or a -SO 3 M- group, where M is an alkali metal or ammonium cation.Surfactant system according to Claim 6, comprising, as anionic surfactant b)(ii), alkali metal or ammonium salts of sulfo-C 10- C 16- alkylates, linear or branched di-C 6- C 20- alkyl sulfosuccinates, linear or branched C 6- C 20- Alkyl(polyglycolether)sulfosuccinaten C 10- C 16- alkyl methyl taurates or any mixtures thereof.Surfactant system according to any of the preceding claims, comprising a) MEL in a proportion by weight of 5 to 90% by weight based on the total weight of the surfactant system b) at least one further surfactant b) in a proportion by weight of 10 to 75% by weight based on the total weight of the surfactant system.Washing, cleaning or textile care composition, comprising a surfactant system according to any of the preceding claims in a proportion by weight of 1 to 35% by weight based on the total weight of the washing, cleaning or textile care composition.Use of a surfactant system according to any of Claims 1 to 8 for improving the washing performance of a washing, cleaning or textile care composition.