DE102023205588A1 - surfactant mixtures containing biosurfactants - Google Patents

Abstract

A surfactant system comprising an anionic surfactant, a fatty alcohol ethoxylate and a mannosylerythritol lipid can be used in a washing, cleaning or textile care agent and has an increased washing performance.

Description

The present application is directed to a surfactant system containing mannosylerythritol lipids, as well as washing, cleaning and textile care agents containing this surfactant system and a method for cleaning and/or caring for textiles.

The use of various surfactants in detergents, cleaning agents and textile care products is well established in the state of the art. So-called biosurfactants are becoming increasingly important because they are obtained from renewable raw materials and therefore have a reduced _carbon footprint. This also meets consumers' desire for more sustainable detergents and cleaning agents.

These biosurfactants include mannosylerythritol lipids (MEL), which are obtained from various microorganisms through fermentation and are currently being investigated primarily for their use in cosmetic products. There is a desire to use this class of biosurfactants in detergents and cleaning products, replacing other, less environmentally friendly surfactants. Initially, however, the detergents obtained showed very poor washing performance. There was therefore a desire to improve the washing performance of detergents containing MEL.

Surprisingly, it has now been found that washing performance, especially against greasy soiling, is increased when MEL is used in a surfactant system having an HLD value (Hydrophilic Lipophilic Deviation) of -4 to 0.5.

The present application therefore relates to a surfactant system comprising a) an anionic surfactant, b) a fatty alcohol alkoxylate and c) a mannosyl erythritol lipid (MEL).

Another subject matter of the invention is a method for cleaning and/or caring for textiles, in which an agent containing this surfactant system is used.

Yet another object of this invention is the use of a surfactant system according to the invention for increasing the cleaning performance of a washing, cleaning or textile care agent.

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 employed in any other aspect of the invention.

Furthermore, it is to be understood that the examples contained 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. All percentages are by weight based on the total weight of the agent/composition unless otherwise stated. Numerical ranges given in the format "from x to y" include the stated values. Where multiple preferred numerical ranges are given in this format, it is to be understood that all ranges resulting from the combination of the various endpoints are also included.

"At least one" as used herein refers to 1, 2, 3, 4, 5, 6, 7, 8, 9 or more. In the context of components of the compositions described herein, this statement does not refer to the absolute amount of molecules but to the type of component. "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 amounts, the amounts refer to the total amount of the correspondingly designated type of component.

The surfactant system according to the invention contains at least one anionic surfactant. Suitable anionic surfactants include alkyl ether sulfates of the formula $${\text{R}}^1-\text{O}-{\left(\text{AO}\right)}_{\text{n}}-{\text{SO}}_3{}^{-}{\text{X}}^{+}$$

In this formula, R ¹ is a linear or branched, substituted or unsubstituted alkyl radical, preferably a fatty alcohol radical. Preferred radicals R ^{1 are selected from decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl radicals and mixtures thereof, with the representatives with an even number of carbon atoms being preferred. Particularly preferred radicals R 1 are} derived from C ₈ -C ₁₈ fatty alcohols, for example from coconut fatty alcohol. hol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol, particularly preferred are C _12-14 fatty alcohols. AO stands for an ethylene oxide (EO) or propylene oxide (PO) group, preferably an ethylene oxide group. The index n stands for an integer from 1 to 50, preferably from 1 to 20 and in particular from 2 to 10. Most preferably, n stands for the numbers 2, 3, 4, 5, 6, 7 or 8. X stands for a monovalent cation or the nth part of an n-valent cation, preferred are the alkali metal ions and among these Na ⁺ or K ⁺ , with Na ⁺ being extremely preferred. Particularly preferred is a C _12-14 alkyl ether sulfate with 2 EO.

Other anionic surfactants that can be used in the context of this application are, for example, fatty alcohol sulfates, linear or branched alkylbenzenesulfonates, ether carboxylates, secondary alkanesulfonates, sulfosuccinates, taurides or soaps. However, alkyl ether sulfates are particularly preferably used in the surfactant system according to the invention.

The anionic surfactant is preferably contained in the surfactant system in an amount of 1 to 50 wt.%, preferably 1 to 20 wt.%, in particular 10 to 20 wt.%.

in der

R2

für einen linearen oder verzweigten, substituierten oder unsubstituierten Alkylrest,

AO

für eine Ethylenoxid- (EO) oder Propylenoxid- (PO) Gruppierung,

m

für ganze Zahlen von 1 bis 50 stehen.

The surfactant system according to the invention also contains a fatty alcohol alkoxylate as a further component. These comply with the formula $${\text{R}}^2-\text{O}-{\left(\text{AO}\right)}_{\text{m}}-\text{H},$$

in the

R2

represents a linear or branched, substituted or unsubstituted alkyl radical,

AO

for an ethylene oxide (EO) or propylene oxide (PO) group,

m

represent integers from 1 to 50.

In the above formula, R ² is a linear or branched, substituted or unsubstituted alkyl radical, preferably a linear, unsubstituted alkyl radical, particularly preferably a fatty alcohol radical. Preferred radicals R ² are selected from decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl radicals and mixtures thereof, with the representatives with an even number of C atoms being preferred. Particularly preferred radicals R ² are derived from C ₁₂ -C ₁₈ fatty alcohols, for example from coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol. AO is an ethylene oxide (EO) or propylene oxide (PO) group, preferably an ethylene oxide group. The index m stands for an integer from 1 to 50, preferably from 1 to 20, particularly preferably from 1 to 15 and in particular from 2 to 10. Most preferably, m stands for the numbers 2, 3, 4, 5, 6, 7 or 8. Most preferably, a C _12-18 fatty alcohol ethoxylate with 7 EO is used.

The fatty alcohol alkoxylate is preferably contained in the surfactant system in an amount of 1 to 90 wt.%, preferably 30 to 80 wt.%, in particular 40 to 75 wt.%.

in der R¹ und R² jeweils unabhängig voneinander für H oder eine Acetylgruppe stehen können und n eine ganze Zahl von 6 bis 10 ist.The third component of the surfactant system is a mannosyl erythritol lipid. Mannosyl erythritol lipids (MEL) are surface-active substances consisting of a hydrophilic part, 4-ObD-mannopyranosyl-meso-erythritol, and a hydrophobic part, which is a fatty acid or an acetyl group. They are obtained by fermentation from various microorganisms, primarily from Pseudozyma sp., but also from Ustilago sp. and from Schizonella melanogramma. Due to their origin, they are classified as so-called biosurfactants. The MELs used according to this invention comply with the following formula (I)

in which R ¹ and R ² can each independently represent H or an acetyl group and n is an integer from 6 to 10.

$$\text{MEL}-\text{B}:{\text{R}}^1=\text{Ac},{\text{R}}^2=\text{H}$$

$$\text{MEL}-\text{C}:{\text{R}}^1=\text{H},{\text{R}}^2=\text{Ac}$$

$$\text{MEL}-\text{D}:{\text{R}}^1={\text{R}}^2=\text{H}.$$

A distinction is made between $$\text{MEL}-\text{A}:{\text{R}}^1={\text{R}}^2=\text{Ac}$$

$$\text{MEL}-\text{B}:{\text{R}}^1=\text{Ac},{\text{R}}^2=\text{H}$$

$$\text{MEL}-\text{C}:{\text{R}}^1=\text{H},{\text{R}}^2=\text{Ac}$$

$$\text{MEL}-\text{D}:{\text{R}}^1={\text{R}}^2=\text{H}.$$

In a preferred embodiment, a mixture of MEL-A and MEL-B is used in the surfactant system according to the invention.

The mannosylerythritol lipid is preferably contained in the surfactant system in an amount of 1 to 80 wt.%, preferably 2 to 60 wt.%, in particular 5 to 40 wt.%.

The surfactant system preferably has an HLD value (hydrophilic lipophilic deviation) of -4 to 0.5, preferably -3.5 to 0, particularly preferably -2 to 0. The concept of hydrophilic lipophilic deviation represents an extension of the HLB concept, in which, in addition to the hydrophilicity/hydrophobicity of the surfactant system, the type of surfactants, the temperature, the salt content and the hydrophobicity of the oil are also taken into account. These parameters are converted into numbers from which the HLD value is determined. Negative HLD values result in an O/W microemulsion, positive HLD values result in a W/O microemulsion and close to HLD = 0 a bicontinuous or lamellar phase. Formulas for calculating the HLD value can be found in the literature, for example Acosta, Bhakta, J. Surfact. Deterg. (2009) 12:7-19 or Chen et al., Colloids Surf. A: Physicochem. Eng. Asp. 634 (2022) 127599 .

This surfactant system can be advantageously incorporated into washing, cleaning and textile care products. A further subject matter of this application is therefore a washing, cleaning or textile care product which contains a surfactant system as described above.

The surfactant system is preferably contained in an amount of 1 to 30 wt.%, preferably 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 product preferably contains at least one further active ingredient, preferably selected from the group comprising one or more further surfactants, builders, bleaches, bleach activators, enzymes, electrolytes, pH adjusters, perfumes, perfume carriers, fluorescent agents, dyes, hydrotopes, foam inhibitors, anti-redeposition agents, graying inhibitors, dirt-removing polymers, shrinkage inhibitors, anti-crease agents, color transfer inhibitors, antimicrobial agents, solvents, germicides, fungicides, antioxidants, preservatives, corrosion inhibitors, antistatic agents, bittering agents, ironing aids, phobic and impregnating agents, skin care agents, swelling and slip-resistant agents, softening components and UV absorbers.

In addition to the surfactants already mentioned above, other non-ionic surfactants can also be used as additional surfactants. These include, for example, 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 also be used, such as quaternary ammonium compounds, especially esterquats.

In a preferred embodiment, however, the washing, cleaning or textile care agent is free of cationic or amphoteric surfactants.

A washing, cleaning or textile care agent according to the invention preferably contains at least one water-soluble and/or water-insoluble, organic and/or inorganic builder. The water-soluble organic builder substances include polycarboxylic acids, in particular citric acid and sugar acids, monomeric and polymeric aminopolycarboxylic acids and their salts, in particular glutamic acid-N,N-diacetic acid (GLDA), methylglycinediacetic 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 accessible by oxidation of polysaccharides, polymeric acrylic acids, methacrylic acids, maleic acids and copolymers of these, which may also contain small proportions of polymerizable substances without carboxylic acid functionality in copolymerized form. The relative average molecular mass 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 the free acid. A particularly preferred acrylic acid-maleic acid copolymer has a relative average molecular mass 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 acid is at least 50% by weight. Terpolymers containing two unsaturated acids and/or their salts as monomers and vinyl alcohol and/or a vinyl alcohol derivative or a carbohydrate as the third monomer can also be used as water-soluble organic builder substances.

Polyphosphates, preferably sodium triphosphate, and the water-soluble crystalline and/or amorphous alkali silicate builders are suitable as water-soluble inorganic builder materials. In a preferred embodiment, however, the washing, cleaning or textile care agents according to the invention are phosphate-free.

Crystalline or amorphous, water-dispersible alkali aluminosilicates are used in particular as water-insoluble inorganic builder materials. Among these, crystalline sodium aluminosilicates in detergent quality, in particular zeolite A, zeolite P and zeolite MAP and optionally zeolite X, are preferred.

All substances that destroy or absorb dyes through oxidation, reduction or adsorption and thus decolorize materials can be used as bleaching agents. These include hypohalite-containing bleaching agents, hydrogen peroxide, perborate, percarbonate, peroxoacetic acid, diperoxoazelaic acid, diperoxododecanedioic acid and oxidative enzyme systems.

The washing, cleaning or textile care product can also contain one or more enzymes. In principle, all enzymes established in the state of the art for these purposes can be used. Preferably, these are one or more enzymes that can develop a catalytic activity in a washing agent, in particular a protease, amylase, lipase, cellulase, hemicellulase, mannanase, pectin-splitting enzyme, tannase, xylanase, xanthanase, β-glucosidase, carrageenase, perhydrolase, oxidase, oxidoreductase and mixtures thereof. Preferred hydrolytic enzymes include in particular proteases, amylases, in particular α-amylases, cellulases, lipases, hemicellulases, in particular pectinases, mannanases, β-glucanases and mixtures thereof. Proteases, amylases and/or lipases and mixtures thereof are particularly preferred, and proteases are particularly preferred. These enzymes are in principle of natural origin; based on the natural molecules, improved variants are available for use in detergents, which are therefore 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.

In order to set a desired pH value which does not arise automatically from the mixture of the other components, the agents according to the invention can contain system- and environmentally compatible acids, 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 hydroxides.

The purpose of graying inhibitors is to keep the dirt detached from textile fibers suspended in the liquor. Water-soluble colloids, usually of an organic nature, are suitable for this purpose, for example starch, glue, gelatin, salts of ethercarboxylic acids or ethersulfonic acids of starch or cellulose, or salts of acidic sulfuric acid esters of cellulose or starch. Water-soluble polyamides containing acidic groups are also suitable for this purpose. Starch derivatives other than those mentioned above can also be used, for example aldehyde starches. Cellulose ethers such as carboxymethylcellulose (Na salt), methylcellulose, hydroxyalkylcellulose and mixed ethers such as methylhydroxyethylcellulose, methylhydroxypropylcellulose, methylcarboxymethylcellulose and mixtures thereof are preferred.

Furthermore, soil release polymers or soil release polymers, so-called SRPs, can be included. SRPs that can be used are in particular oligoesters obtained from preferably terephthalic acid, isophthalic acid, sulfoisophthalic acid and/or their methyl esters, aliphatic dicarboxylic acids (saturated and/or unsaturated), for example adipic acid, and/or their anhydrides, aliphatic substituted dicarboxylic acids, for example nonylsuccinic acid, alkylene glycols (ethylene, 1,2-propylene, 1,2-butylene glycol), polyethylene glycols, alkylpolyethylene glycols, polyethylene glycol benzoic acid esters, polyethylene glycol sulfobenzoic acid esters and optionally alkanolamines. Polymers based on terephthalate-PEG are preferred, as are commercially available, for example, under the trade name Texcare ^® . Alternatively, (co)polymers based on polyethyleneimine, polyvinyl acetate and polyethylene glycol can also be used.

Suitable dirt-removing polymers are generally already known to a sufficient extent from the prior art. In particular, all polymers known in the prior art for this purpose can therefore be used.

In order to effectively suppress dye detachment and/or dye transfer to other textiles during washing and/or cleaning of dyed textiles, the composition according to the invention can contain a dye transfer inhibitor (DTI). It is preferred that the dye 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. Polyvinylpyrrolidone (PVP), polyvinylimidazole (PVI) or copolymers of vinylpyrrolidone and vinylimidazole (PVP/PVI) are particularly preferably used as dye transfer inhibitors.

Polycarboxylates are particularly suitable as antiredeposition agents. Suitable materials can be prepared by the polymerization or copolymerization of unsaturated carboxylic acid monomers, such as acrylic acid, maleic acid (or anhydride), fumaric acid, itaconic acid, aconitic acid, mesaconic acid, citraconic acid and methylmalonic acid. Acrylate polymers and acrylic/maleic acid copolymers are particularly preferred.

The washing, cleaning or textile care products can contain, for example, derivatives of diaminostilbenedisulfonic acid or its alkali metal salts as optical brighteners. However, color detergents are preferably free of optical brighteners. Suitable examples are salts of 4,4'-bis(2-anilino-4-morpholino-1,3,5-triazinyl-6-amino)stilbene-2,2'-disulfonic acid or similarly structured compounds that 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 diphenylstyryl type may be present, for example the alkali 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 mechanical processes, it can be advantageous to add conventional foam inhibitors to washing, cleaning or textile care products. Suitable foam inhibitors include, for example, soaps of natural or synthetic origin that have a high proportion of C18-C24 fatty acids. Suitable non-surfactant-type foam inhibitors are, for example, organopolysiloxanes and their mixtures with microfine, optionally silanized silica, as well as paraffins, waxes, microcrystalline waxes and their mixtures with silanized silica or bis-fatty acid alkylenediamides. Mixtures of different foam inhibitors are also advantageously used, for example those made of silicones, paraffins or waxes. The foam inhibitors, in particular silicone and/or paraffin-containing foam inhibitors, are preferably attached to a granular, water-soluble or water-dispersible carrier. substance. Mixtures of paraffins and bistearylethylenediamide are particularly preferred.

The washing, cleaning or textile care product can be in any known form, for example solid, liquid, gel-like, pasty, as a powder, as granules or as a tablet. Liquid products contain solvents. In a preferred embodiment, the main solvent is water. In addition, non-aqueous solvents can be added to the product. Suitable non-aqueous solvents include mono- or polyhydric alcohols, alkanolamines or glycol ethers, provided they are miscible with water in the specified concentration range. Preferably, the solvents are selected from ethanol, n-propanol, i-propanol, butanols, glycol, propanediol, butanediol, methylpropanediol, glycerin, 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 glycerin.

To further improve the stability of the agents, 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 increase the water solubility of poorly soluble (hydrophobic) organic compounds. A second component (ie the hydrotrope) is added to the poorly soluble substance, but this second component is not itself a solvent. Hydrotropes of this type have hydrophilic and hydrophobic structural units (like surfactants) but without the tendency to form aggregates in water (unlike surfactants). In various embodiments, these hydrotropes have no micelle-forming activity or the critical micelle formation concentration (CMC) is greater than 10 ^-4 mol/L, preferably greater than 10 ^-3 mol/L and even more preferably 10 ^-2 mol/L. The "critical micelle formation concentration" is, in accordance with the general understanding in the prior art, the concentration of the corresponding substance above which it begins to form micelles and every further molecule added to the system passes into 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 hydrotropic compounds 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 product is offered as a single dose pre-portioned in a water-soluble casing. The water-soluble casing is preferably formed by a water-soluble film material.

Such unit doses may be manufactured by either vertical form fill seal (VFFS) or thermoforming processes. The thermoforming process generally involves forming a first layer of a water soluble film material to form recesses for receiving a composition therein, filling the agent into the recesses, covering the agent-filled recesses with a second layer of a water soluble film material, and sealing the first and second layers together at least around the recesses.

The water-soluble casing is preferably formed from a water-soluble film material selected from the group consisting of polymers or polymer mixtures. The casing can be formed from one or two or more layers of the water-soluble film material. The water-soluble film material of the first layer and the further layers, if present, can be the same or different. The single dose, comprising the washing, cleaning or textile care agent and the water-soluble casing, can also have one or more chambers. The agent can be contained in one or more chambers, if present, of the water-soluble casing. The amount of detergent preferably corresponds to the full or half dose required for a 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, polystyrene sulfonates, polyurethanes, polyesters, polyethers, polylactic acid, and/or mixtures of the above polymers can be added to the film material.

In addition to vinyl alcohol, preferred polyvinyl alcohol copolymers comprise 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 may have a substantially dimensionally stable spherical, spherical ellipsoidal, cube-shaped, cuboid-shaped 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 agents. If the water-soluble packaging has two or more chambers, both chambers can each contain a solid partial composition or a liquid partial composition, or one or more chambers can contain solid compositions and one or more further chambers can contain liquid compositions.

1. a) Bereitstellen einer Waschlösung umfassend ein erfindungsgemäßes Wasch-, Reinigungs- oder Textilpflegemittel und
2. b) In Kontakt bringen eines Textils mit der Waschlösung gemäß a). Hierunter fallen sowohl manuelle als auch maschinelle Verfahren, wobei maschinelle Verfahren bevorzugt sind.

Another subject matter of the invention is a method for cleaning and/or caring for textiles comprising the method steps:

1. a) providing a washing solution comprising a washing, cleaning or textile care agent according to the invention and
2. b) Bringing a textile into contact with the washing solution according to a). This includes both manual and mechanical processes, with mechanical processes being preferred.

Yet another object of this invention is the use of a surfactant system according to the invention for increasing the cleaning performance of a washing, cleaning or textile care agent.

implementation examples

increase in washing performance

The washing performance of various surfactant systems, composed of MEL and co-surfactants, was tested in a high-throughput washing device at 40°C and pH 8. The total surfactant concentration in all tests was 52g/17l in the wash liquor. Twelve different standardized soils (3x lipstick, pigment/oil, pigment/tallow, olive oil, 2x tallow, mayonnaise, frying oil, lard, beef fat) were used on cotton or polyester-cotton blended fabrics. After drying, the reflectance values of the washed textiles were determined and added together. The results are given in the table below as averages of fourfold determinations of the twelve different soils; for comparison, the positive sample was washed with the surfactant system of a detergent currently on the market and the negative sample was washed with water. surfactant system washing performance 19% anionic surfactant, 81% MEL 575.3 20% anionic surfactant, 40% MEL, 40% fatty alcohol alkoxylate 586.8 10% anionic surfactant, 15% MEL, 75% fatty alcohol alkoxylate 586.7 positive sample 568.8 negative sample 520.9

A C _12-14 fatty alcohol ether sulfate with 2 EO was used as anionic surfactant, and a C _12-18 fatty alcohol with 7 EO was used as fatty alcohol alkoxylate.

It is shown that the use of the surfactant system according to the invention has increased the washing performance and that it remains the same over a wide range.

Initial washing tests show not only this increase in washing performance against greasy soiling but also an improvement against enzyme-sensitive soiling.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited non-patent literature

• Acosta, Bhakta, J. Surfact. Deterg. (2009) 12:7-19 or Chen et al., Colloids Surf. A: Physicochem. Eng. Asp. 634 (2022) 127599 [0022]

Claims (13)

Surfactant system comprising a) an anionic surfactant, b) a fatty alcohol alkoxylate and c) a mannosyl erythritol lipid (MEL). surfactant system according to claim 1 , characterized in that it has an HLD value (Hydrophilic Lipophilic Deviation) of -4 to 0.5, preferably from -3.5 to 0, particularly preferably -2 to 0 Surfactant system according to one of the Claims 1 or 2 , characterized in that the anionic surfactant is preferably an alkyl ether sulfate, particularly preferably a linear or branched C8-18 alkyl ether sulfate with 1 to 8 EO, especially preferably a C12-14 alkyl ether sulfate with 2 EO. Surfactant system according to one of the preceding claims, characterized in that the fatty alcohol alkoxylate is preferably a fatty alcohol ethoxylate, particularly preferably an ethoxylated C8-20 alcohol with 1 to 15 EO, in particular C12-18 alcohol with 7 EO. Surfactant system according to one of the preceding claims, characterized in that the anionic surfactant a) is contained in an amount of 1 to 50 wt.%, preferably 1 to 20 wt.%, in particular 10-20 wt.%, in each case based on the entire surfactant system. Surfactant system according to one of the preceding claims, characterized in that the fatty alcohol alkoxylate b) is contained in an amount of 1 to 90 wt.%, preferably 30 to 80 wt.%, in particular 40 to 75 wt.%, in each case based on the entire surfactant system. Surfactant system according to one of the preceding claims, characterized in that the MEL c) is contained in an amount of 1 to 80 wt.%, preferably 2 to 60 wt.%, in particular 5 to 40 wt.%, in each case based on the entire surfactant system. Washing, cleaning or textile care agent, characterized in that it comprises a surfactant system according to one of the preceding claims. Detergents, cleaning agents or textile care products according to claim 8 , characterized in that the surfactant system is contained in an amount of 1 to 30 wt.%, preferably in an amount of 10 to 25 wt.%, in each case based on the total agent. Detergents, cleaning agents or textile care products according to one of the Claims 8 or 9 , characterized in that it contains at least one further active ingredient, preferably selected from the group comprising one or more further surfactants, builders, bleaches, bleach activators, enzymes, electrolytes, pH adjusters, perfumes, perfume carriers, fluorescent agents, dyes, hydrotopes, foam inhibitors, anti-redeposition agents, graying inhibitors, soil-removing polymers, shrinkage inhibitors, crease inhibitors, color transfer inhibitors, antimicrobial active ingredients, solvents, germicides, fungicides, antioxidants, preservatives, corrosion inhibitors, antistatic agents, bittering agents, ironing aids, phobic and impregnating agents, skin-care active ingredients, swelling and slip-resistant agents, softening components and UV absorbers. Single dose comprising a washing, cleaning or textile care product according to one of the Claims 8 until 10 in a water-soluble casing, in particular a water-soluble casing made of a water-soluble film material, wherein the water-soluble film material preferably contains polyvinyl alcohol or a polyvinyl alcohol copolymer. Method for cleaning and/or caring for textiles comprising the process steps: a) providing a washing solution comprising a washing, cleaning or textile care agent according to one of the Claims 8 until 11 , b) bringing a textile into contact with the washing solution according to a). Use of a surfactant system according to one of the Claims 1 until 7 to increase the cleaning performance of a washing, cleaning or textile care product.