EP2454357A1

EP2454357A1 - Liquid washing or cleaning agent comprising anti-graying polysaccharide

Info

Publication number: EP2454357A1
Application number: EP10732386A
Authority: EP
Inventors: Peter Schmiedel; Ulrich Pegelow; Evelyn Langen; Sabine SCHÜMANN; Martina Hutmacher; Heinz-Jürgen VÖLKEL; Marc-Steffen Schiedel; Matthias Sunder; Birgit GLÜSEN; Cornelius Bessler; Timothy O'connell
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2009-07-17
Filing date: 2010-07-15
Publication date: 2012-05-23
Also published as: JP2012533640A; US20120122753A1; MX2012000780A; WO2011006973A1; DE102009027811A1; KR20120089621A

Abstract

The invention relates to a stable liquid washing or liquid cleaning agent comprising an anti-graying polysaccharide. The invention further relates to the use of the liquid washing or liquid cleaning agent and to a method for the production thereof.

Description

"Liquid washing or cleaning agent with graying-inhibiting polysaccharide"

The invention relates to a liquid washing or cleaning agent containing surfactant (s) and a graying-inhibiting polysaccharide. The invention also relates to the use of the detergent or cleaning agent and a process for its preparation.

To increase the washing or cleaning performance of detergents or cleaners they often contain one or more additives. For example, in order to prevent re-release of previously released soil in finer distribution (redeposition), detergents contain so-called graying inhibitors, such as carboxymethylcellulose.

Thus, EP 054325 A1 describes a detergent with carboxymethyl cellulose as a graying inhibitor.

Due to the low solubility of carboxymethylcellulose in liquid washing or cleaning agents, there is hitherto no liquid washing or cleaning agent on the market which contains carboxymethylcellulose as a grayness inhibitor. Another problem is that stable dispersions of carboxymethylcellulose in the matrix of a detergent or cleaning agent are very difficult to obtain and that when storing a washing or cleaning agent containing carboxymethylcellulose precipitations occur in the form of sedimentation and / or creaming.

All this leads to the fact that when using powder detergents in the

Carboxymethylcellulose can be incorporated easily, a much lower

Graying the laundry occurs when using liquid detergents.

It is therefore an object of the invention to provide a stable liquid detergent or cleaning agent with a polysaccharide as a grayness inhibitor.

This object is achieved by a liquid washing or cleaning agent containing 0.1 to 60 wt .-% surfactant, 0.1 to 5 wt .-% of a graying-inhibiting polysaccharide, 0.05 to 1 wt .-% of a thickener and 1 to 20 wt .-% of an inorganic salt.

It has surprisingly been found that graying-inhibiting polysaccharides can be stably incorporated into the matrix of a liquid detergent or cleaning agent when the matrix contains a thickening agent and an inorganic salt.

By the addition of the salt occurs in the liquid detergent or cleaning a

Microphase separation. The result is a surfactant-rich phase and a continuous, low-surfactant phase, wherein the surfactant-rich phase is dispersed in the continuous, low-surfactant phase. The presence of the thickener prevents the continuous, low-surfactant phase from separating macroscopically. In addition, small amounts of thickening agent are sufficient by the combination with the inorganic salt, so that the detergents or cleaners have a flow limit. This offers the possibility to disperse solids stably in the washing or cleaning agent.

It is advantageous if the graying-inhibiting polysaccharide is selected from the group comprising carboxymethylcellulose (CMC), ether sulfonic acid salts, cellulose ether sulfonic acid salts, cellulose acid sulfate acid salts, starch acid starch, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose

Methylhydroxyethylcellulose, methylcarboxymethylcellulose, ethylhydroxyethylcellulose and mixtures thereof. Most preferably, the polysaccharide

Carboxymethylcellulose, especially sodium carboxymethylcellulose.

These preferred graying-inhibiting polysaccharides lead to washing or

Detergent with a particularly good anti-rough effect.

It is preferred that the inorganic salt is selected from the group comprising sodium chloride, potassium chloride, sodium sulfate, sodium carbonate, potassium sulfate, potassium carbonate,

Sodium bicarbonate, potassium bicarbonate, calcium chloride, magnesium chloride and mixtures thereof is selected because these salts are very soluble in water.

Further, it is preferred that the thickening agent is selected from the group comprising xanthan, guar, carrageenan, agar-agar, gellan, pectin, locust bean gum and mixtures thereof. These compounds are effective even in the presence of inorganic salts

Thickener. In a particularly preferred embodiment, the washing or cleaning agent contains xanthan gum as a thickening agent, since xanthan gum effectively thickened even in the presence of high salt concentrations and prevents macroscopic separation of the continuous phase.

In a particularly preferred embodiment, the washing or cleaning agent further contains a cellulase.

Usually, the combined formulation of cellulose (derivatives) and cellulase in a liquid product with time, for example during storage, leads to a degradation of the

Cellulose (derivatives) by the cellulase. In the washing or cleaning agent according to the invention, graying-inhibiting cellulose (derivatives), such as CMC, can be incorporated not only physically stable but also chemically stable. Without wishing to be bound by this theory, the graying-inhibiting polysaccharides and the cellulase appear to be different phases and thus separate from each other. The cellulose is present in the surfactant-rich phase and the cellulase in the continuous low-surfactant phase.

In a preferred embodiment, the liquid detergent or cleaning agent contains an acrylic polymer. Surprisingly, it has been shown that the graying-inhibiting effect of the liquid detergent or cleaning agent can be increased by the presence of an acrylic polymer.

Furthermore, the invention relates to the use of the washing or cleaning agent according to the invention for washing and / or cleaning of textile fabrics.

The invention also encompasses the use of from 0.05 to 1% by weight of a thickening agent and from 1 to 20% by weight of an inorganic salt to produce a microphase separation in a liquid detergent or cleaner. It is preferable that the liquid washing or cleaning agent contains a graying-inhibiting polysaccharide.

In a further aspect, the invention relates to a method for producing a

micro-two-phase liquid detergent or cleaning agent containing

0.1 to 60% by weight of surfactant,

0.1 to 5 wt .-% of a graying-inhibiting polysaccharide and

From 0.05 to 1% by weight of a thickener,

in which 1 to 20 wt .-% of an inorganic salt are added to the liquid detergent or cleaning agent.

In the following, the invention will be described in more detail, inter alia, by way of examples.

The liquid washing or cleaning agent according to the invention contains a graying-inhibiting polysaccharide, surfactant, a thickening agent and an inorganic salt.

As a graying-inhibiting polysaccharide, the liquid washing or cleaning agent preferably contains carboxymethylcellulose (CMC), an ether sulfonic acid salt, an acid sulfonic acid salt of cellulose, an acid sulfuric acid ester salt of starch, methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, methyl carboxymethyl cellulose,

Ethylhydroxyethylcellulose or a mixture of these graying-inhibiting polysaccharides. Very particularly preferred is the graying-inhibiting polysaccharide

Carboxymethylcellulose, especially sodium carboxymethylcellulose. The amount of graying-inhibiting polysaccharide is 0.1 to 5 wt .-%, based on the total amount of the detergent or cleaning agent. The amount of is preferably

Graying-inhibiting polysaccharide between 0.2 and 4 wt .-% and most preferably between 0.5 and 3 wt .-%, each based on the total amount of the detergent or cleaning agent.

There are preferably sodium carboxymethylcelluloses In powder and / or granular form having a bulk density of 300 to 700 g / L and a degree of substitution of 0.4 to 1, 5, preferably 0.5 to 0.9, are used. The degree of substitution indicates how many of the three possible hydroxyl groups of the cellulose are etherified.

The washing or cleaning agent contains surfactant (s) in addition to the graying-inhibiting polysaccharide, wherein anionic, nonionic, zwitterionic and / or amphoteric surfactants can be used. From an application point of view, preference is given to mixtures of anionic and nonionic surfactants. The total surfactant content of the liquid washing or cleaning agent is preferably below 60% by weight and more preferably below 45% by weight, based on the total liquid washing or cleaning agent.

Suitable nonionic surfactants include alkoxylated fatty alcohols, alkoxylated

Fatty acid alkyl esters, fatty acid amides, alkoxylated fatty acid amides, polyhydroxy fatty acid amides, alkylphenol polyglycol ethers, amine oxides, alkyl polyglucosides and mixtures thereof.

The nonionic surfactants used are preferably alkoxylated, advantageously ethoxylated, in particular primary, alcohols having preferably 8 to 18 carbon atoms and on average 1 to 12 moles of ethylene oxide (EO) per mole of alcohol, in which the alcohol radical can be linear or preferably methyl-branched in the 2-position or linear and methyl-branched radicals in the mixture can contain, as they are usually present in Oxoalkoholresten. In particular, however, alcohol ethoxylates with linear radicals of alcohols of native origin having 12 to 18 carbon atoms, for example of coconut, palm, tallow or oleyl alcohol, and on average 2 to 8 EO per mole of alcohol are preferred. Preferred ethoxylated alcohols include, for example _C12 - ₁₄ - alcohols containing 3 EO, 7 EO or 4 EO, C ₉ n-alcohol with 7 EO, C ₁₃ -i ₅ alcohols containing 3 EO, 5 EO, 7 EO or 8 EO, C ₁₂ -i ₈ -alcohols with 3 EO, 5 EO or 7 EO and mixtures of these, such as

Mixtures of C ₁₂ -i ₄ -alcohol with 3 EO and C ₁₂ -i ₈ -alcohol with 7 EO. The specified

Levels of ethoxylation represent statistical averages, which may be an integer or a fractional number for a particular product. Preferred alcohol ethoxylates have a narrow homolog distribution (narrow rank ethoxylates, NRE). In addition to these nonionic surfactants, fatty alcohols with more than 12 EO can also be used. Examples of these are tallow fatty alcohol with 14 EO, 25 EO, 30 EO or 40 EO. Nonionic surfactants containing EO and PO groups together in the molecule can also be used according to the invention. Also suitable are also a mixture of a (more) branched ethoxylated fatty alcohol and a unbranched ethoxylated fatty alcohol, such as a mixture of a Ci _6- i ₈ - fatty alcohol with 7 EO and 2-propylheptanol with 7 EO. Most preferably, the washing, cleaning, post-treatment or washing aid containing a C _12-i ₈ fatty alcohol with 7 EO, or C ₁₃ _ ₁₅ -oxo alcohol with 7 EO as non-ionic surfactant.

The content of nonionic surfactants in the washing or cleaning agent is preferably 3 to 40 wt .-%, preferably 5 to 30 wt .-% and in particular 7 to 20 wt .-%, each based on the total detergent or cleaning agent.

In addition to the nonionic surfactants, the washing or cleaning agent may also contain anionic surfactants. The anionic surfactant used is preferably sulfonates, sulfates, soaps, alkyl phosphates, anionic silicone surfactants and mixtures thereof.

As surfactants of the sulfonate type preferably come C ₉ .i ₃ -Alkylbenzolsulfonate,

Olefinsulfonate, ie mixtures of alkene and hydroxyalkanesulfonates and disulfonates, such as those from C | _{_2-18} monoolefins with terminal or internal double bond by sulfonation with gaseous sulfur trioxide and subsequent alkaline or acidic hydrolysis of the sulfonation products into consideration. Also suitable are C ₁₂ -i ₈ -alkanesulfonates and the esters of α-sulfo fatty acids (ester sulfonates), for example the α-sulfonated methyl esters of hydrogenated coconut, palm kernel or tallow fatty acids.

Alk (en) ylsulfates are the alkali metal and in particular the sodium salts of

Sulfuric acid half esters of C ₁₂ -C ₁₈ -FeHaIkOhOIe, for example, from coconut fatty alcohol,

Taigfettalkohol, lauryl, myristyl, cetyl or stearyl alcohol or the C ₁₀ -C ₂ o-oxo alcohols and those half-esters of secondary alcohols of these chain lengths are preferred. Of washing technology interest, the Ci ₂ -C ₁₆ alkyl sulfates and C ₁₂ -C ₁₅ alkyl sulfates and C ₁₄ -C ₅ alkyl sulfates are preferred. 2,3-alkyl sulfates are also suitable anionic surfactants.

Also, the sulfuric acid monoesters of straight-chain or branched C ₇ ethoxylated with 1 to 6 moles of ethylene oxide. ₂₁ -alcohols, such as 2-methyl-branched C ^ -π-alcohols having an average of 3.5 moles of ethylene oxide (EO) or C ₁₂ --i ₈ -Fettalkohole with 1 to 4 EO, are suitable.

Also preferred anionic surfactants are soaps. Suitable are saturated and unsaturated fatty acid soaps, such as the salts of lauric acid, myristic acid, palmitic acid, stearic acid, (hydrogenated) erucic acid and behenic acid and, in particular, soap mixtures derived from natural fatty acids, for example coconut, palm kernel, olive oil or tallow fatty acids.

The anionic surfactants including the soaps may be in the form of their sodium, potassium or magnesium or ammonium salts. Preferably, the anionic surfactants are in Form their sodium salts. Further preferred counterions for the anionic surfactants are also the protonated forms of choline, triethylamine or methylethylamine.

The content of anionic surfactants in a washing or cleaning agent may be from 1 to 40% by weight, preferably from 5 to 30% by weight and most preferably from 10 to 25% by weight, based in each case on the total washing or cleaning agent ,

The washing or cleaning agent further contains as essential ingredient a thickening agent. The thickening agent may include, for example, xanthan, guar, carrageenan, agar-agar, gellan, pectin, locust bean gum and mixtures thereof. These thickeners, in combination with the inorganic salt, give the detergents or cleaning agents a flow limit even at low temperatures. Especially preferred is xanthan

Thickener used, since this thickening the detergent or cleaning agent stably and effectively even at high salt concentrations. In addition, the thickener stabilizes the continuous, low surfactant phase and prevents macroscopic phase separation.

Alternatively, (meth) acrylic acid (co) polymers can be used as thickeners. Suitable acrylic and methacrylic (co) polymers include, for example, the high molecular weight homopolymers of acrylic acid crosslinked with a polyalkenyl polyether, in particular an allyl ether of sucrose, pentaerythritol or propylene (INCI name according to "International Dictionary of Cosmetic Ingredients" of "The Cosmetic, Toiletry and Fragrance Association (CTFA) ": carbomer), also referred to as carboxyvinyl polymers. Such

Polyacrylic acids are available, inter alia, under the trade names Polygel® and Carbopol®. Furthermore, for example, the following acrylic acid copolymers are suitable: (i) Copolymers of two or more monomers from the group of acrylic acid, methacrylic acid and their simple, preferably with Ci_ ₄ alkanols formed esters (INCI acrylates copolymer), for example, under the trade name Aculyn ®, Acusol® or Tego® polymer are available; (ii) crosslinked high molecular weight acrylic acid copolymers, such as those crosslinked with an allyl ether of sucrose or pentaerythritol copolymers of Cio- ₃₀ alkyl acrylates with one or more monomers from the group of acrylic acid, methacrylic acid and their simple, preferably with C-ι _4- alkanols formed esters (INCI acrylates / Cio ₃₀ alkyl acrylate crosspolymer) include and which are available, for example under the trade name Carbopol®. Other suitable polymers are (meth) acrylic acid (co) polymers of the Sokalan® type.

It may be preferred that the washing or cleaning agent according to the invention

(Meth) acrylic acid (co) polymer in combination with another thickener, preferably xanthan.

The washing or cleaning agent may contain from 0.05 to 1, 5 wt .-% and preferably 0.1 to 1 wt .-%, each based on the total washing or cleaning agent, thickener. The Amount of thickener used depends on the type of thickener and the desired degree of thickening.

Another essential constituent of the washing or cleaning agent according to the invention is the inorganic salt. This is used depending on the surfactant system used in an amount of 1 to 20 wt .-%, based on the total detergent or cleaning agent.

Preferred inorganic salts include sodium chloride, potassium chloride, sodium sulfate,

Sodium carbonate, potassium sulfate, potassium carbonate, sodium bicarbonate,

Potassium bicarbonate, calcium chloride, magnesium chloride and mixtures thereof. Particularly stable washing or cleaning agents are obtained when using sodium sulfate.

The addition of the inorganic salt leads to a separation of the liquid matrix of the detergent or cleaning agent in a surfactant-rich, liquid-crystalline phase, which in a

continuous, surfactant-poor phase is dispersed. With this microphase separation, it becomes possible to stably disperse a graying-inhibiting polysaccharide in a liquid washing or cleaning agent.

In addition, the inorganic salt has an influence on the viscosity of the washing or

Detergent and with the help of the amount of inorganic salt, the viscosity can be adjusted so that the detergent or cleaning agent is easy to dose and a container with the detergent or cleaning agent has a good residual emptying.

In addition to the graying-inhibiting polysaccharide, the surfactant (s), the thickener and the inorganic salt, the washing or cleaning agent may contain further ingredients which further improve the performance and / or aesthetic properties of the washing or cleaning agent. In the context of the present invention, the washing or cleaning agent preferably additionally contains one or more substances from the group of builders, bleaches, enzymes, electrolytes, nonaqueous solvents, pH adjusters, perfumes, perfume carriers, fluorescers, dyes, hydrotopes, foam inhibitors, silicone oils, antiredeposition agents, other grayness inhibitors, anti-shrinkage agents, anti-wrinkling agents, dye transfer inhibitors, antimicrobial agents, germicides, fungicides, antioxidants, preservatives, corrosion inhibitors, antistatic agents, bittering agents, ironing aids, repellents and impregnating agents, swelling and anti-slip agents, softening components and UV absorbers.

As builders that may be included in the washing or cleaning agent, are

in particular silicates, aluminum silicates (in particular zeolites), carbonates, salts of organic di- and polycarboxylic acids and mixtures of these substances. Organic builders which may be present in the washing or cleaning agent are, for example, the polycarboxylic acids which can be used in the form of their sodium salts, polycarboxylic acids meaning those carboxylic acids which carry more than one acid function. For example, these are citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, aminocarboxylic acids,

Nitrilotriacetic acid (NTA), methylglycine diacetic acid (MGDA) and their derivatives and mixtures thereof. Preferred salts are the salts of polycarboxylic acids such as

Citric acid, adipic acid, succinic acid, glutaric acid, tartaric acid, sugar acids and

Mixtures of these.

As builders further polymeric polycarboxylates are suitable. These are, for example, the alkali metal salts of polyacrylic acid or polymethacrylic acid, for example, those having a molecular weight of 600 to 750,000 g / mol.

Suitable polymers are in particular polyacrylates, which preferably have a molecular weight of from 1,000 to 15,000 g / mol. Because of their superior solubility, the short-chain polyacrylates, which have molecular weights of from 1,000 to 10,000 g / mol, and particularly preferably from 1,000 to 5,000 g / mol, may again be preferred from this group.

Also suitable are copolymeric polycarboxylates, in particular those of acrylic acid with methacrylic acid and of acrylic acid or methacrylic acid with maleic acid. To improve the water solubility, the polymers may also contain allylsulfonic acids, such as allyloxybenzenesulfonic acid and methallylsulfonic acid, as a monomer.

However, preference is given to using soluble builders, such as, for example, citric acid, or acrylic polymers having a molar mass of from 1,000 to 5,000 g / mol, preferably in the liquid detergents or cleaners.

The washing or cleaning agent preferably comprises an acrylic polymer, since this further increases the graying-inhibiting effect of the washing or cleaning agent. In the context of this invention, the term acrylic polymer is understood to mean (co) polymers which comprise at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylic acid esters or methacrylic acid esters. The acrylic polymer may, for example, be a thickening acrylic polymer and be used as a thickening agent in the washing or cleaning agent according to the invention. In this case, the acrylic polymer is usually hydrophobically modified. Alternatively, the acrylic polymer can also act as a builder at the same time. A particularly large increase in the graying-inhibiting effect is observed in (poly) anionic acrylic polymers. For this reason, the washing or cleaning agent as the preferred acrylic polymer contains a homopolymer of acrylic acid. The liquid detergent or cleaning agent may also contain an enzyme or a mixture of enzymes. Particularly suitable are those from the class of hydrolases, such as proteases, (poly) esterases, lipases, amylases, lycosyl hydrolases, hemicellulases, cutinases, .beta.-glucanases, oxidases, peroxidases, mannanases, perhydrolases, oxireductases and / or laccases.

However, it is particularly possible to incorporate cellulases into the washing or cleaning agent, without them the graying-inhibiting polysaccharide, which is preferably a

Cellulose is significantly reduce.

In the context of the present invention, preference is given to cellulases in combination with

Proteases, amylases, lipases, mannanases, laccases, tannanases and

Esterases / polyesterases and with mixtures of two or more of these enzymes used.

The amount of enzyme or of the enzymes is based on the total agent 0.01 to 10 wt .-%, preferably 0.12 to about 3 wt .-%. The enzymes are preferably used as enzyme liquid formulation (s). If the liquid washing or cleaning agent contains a mixture of enzymes, then at least one enzyme may be in the form of granules, encapsulated or adsorbed on carriers. Most preferred detergents or cleaners contain cellulase; Cellulase and protease; Cellulase, protease and amylase; Cellulase, protease, amylase and lipase or amylase; Cellulase, protease, amylase, lipase and mannanase.

The washing or cleaning agents according to the invention are liquid and contain water as the main solvent. In addition, the washing or cleaning agent non-aqueous

Solvents are added. Suitable non-aqueous solvents include mono- or polyhydric alcohols, alkanolamines or glycol ethers, provided that they are miscible with water in the specified concentration range. The solvents are preferably selected from ethanol, n-propanol, i-propanol, butanols, glycol, propanediol, butanediol, glycerol, diglycol, propyldiglycol, butyldiglycol, 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, diisopropylene glycol monomethyl ether, di-isopropylene glycol monoethyl ether, methoxy triglycol, ethoxy triglycol, butoxy triglycol, 1-butoxyethoxy-2-propanol, 3-methyl-3-methoxybutanol, propylene glycol t-butyl ether, di-n-octyl ether and Mixtures of these solvents. However, it is preferred that the washing or cleaning agent contain a polyol as a nonaqueous solvent. The polyol may in particular comprise glycerol, 1, 2-propanediol, 1, 3-propanediol, ethylene glycol, diethylene glycol and / or dipropylene glycol. Most preferably, the washing or cleaning agent contains a mixture of a polyol and a monohydric alcohol. Non-aqueous solvents may be used in the washing or cleaning agent in amounts between 0.5 and 15 wt .-%, but preferably below 12 wt .-% and.

The washing or cleaning agents according to the invention can be used for washing and / or cleaning textile fabrics.

The preparation of the washing or cleaning agent by means of conventional and known methods and methods. Thus, for example, the constituents of the washing or cleaning agents can be mixed in stirred tanks, initially water is introduced. Then the thickener and then the inorganic salt are added. This is followed by non-aqueous solvents and surfactants. Subsequently, if present, the fatty acid is added and the saponification of the fatty acid portion and the neutralization of the anionic surfactants, which are used in the acid form. Then the other ingredients, including the graying-inhibiting polysaccharide, are added, preferably in portions.

The following Table 1 shows the compositions of a washing or cleaning agent E1 according to the invention (all amounts are in% by weight of active substance, based on the

Composition, indicated).

Table 1 :

E1% by weight

Linear Ci ₀ -Ci ₃ -Alkylbenzolsulfonsäure, Na salt 21, 4

Ci ₂ -i ₈ fatty alcohol with 7 EO 10

Xanthan 0.1

Polyacrylic acid (MW = ~ 4,500) 1

Citric acid, Na salt 2.5

Phosphonic acid, Na salt 0.8

Boric acid, Na salt 1, 06

Carboxymethyl cellulose, Na salt 1, 4

Optical brightener 0.08

1, 2-propanediol 5

Ethanol 3,5

Silicone defoamer 0.05

Cellulase 0.1

Other enzymes (amylase & protease) 2

Sodium sulfate 5

Perfume 1, 5

Dye +

Water Ad 100 The washing or cleaning agent E1 was stable for several weeks.

The sodium carboxymethylcellulose used had a bulk density of 300 to 600 g / L and a degree of substitution of 0.8 ± 0.05.

To prove the graying-inhibiting effect, the washing or cleaning agent E1 according to the invention was subjected to a washing test. The washing or cleaning agent E1 was compared with a commercially available powder detergent V1 (content of Na carboxymethylcellulose: 1.4% by weight) and a commercially available liquid detergent V2 which contained no graying-inhibiting polysaccharide.

For this purpose, a household washing machine (Miele W 526) was loaded with 3.5 kg of slightly soiled, white laundry made of various materials (cotton, polyester, polyamide, blended fabrics, etc.). There were successively 5 washes at 40 ⁰ C (dosage: liquid = 95 ml and solid = 195 ml) carried out and then after hanging drying and lack of washing their brightness value (Y value of tristimulus {X, Y, Z}) spectrally photometrically determined (see Table 2).

Table 2: Y-values of the washed textiles

E1 V1 V2

Cotton 83.1 81, 3 79.9

Polyester 79 76.2 77.2

Average of all textiles 83 80.9 80.5

The values clearly show that the laundry which has been treated with the washing or cleaning agent E1 according to the invention has significantly higher y values and thus less readily grayens than the laundry treated with the comparative formulations V1 and V2.

It turns out that the washing or cleaning agent according to the invention even has a much stronger, graying-inhibiting effect than the powder detergent.

In order to show that a favorable flow behavior of the washing or cleaning agent can be adjusted with the aid of the inorganic salt, in a washing or cleaning agent with a composition according to Table 1, the salt concentration, each in compensation for water, was varied and the viscosity of the obtained Detergent or cleaning agent determined. Table 3

Salinity [% by weight] 0 2 5 7 10

Viscosity [mPas] 5630 3955 4335 7270 16750

The determination of the viscosity was carried out with a Brookfield viscometer at a temperature of 20 ⁰ C and a speed of 20 U / min. At the salt concentrations of 0% by weight, 2% by weight and 5% by weight, spindle 3 was used, while at the other concentrations spindle 4 was used.

At a salt content of 0% by weight, no formulation according to the invention is present, since this is not micro-two-phase.

The values in Table 3 clearly show that the salt concentration has a significant influence on the viscosity of the detergents or cleaners. About the salt concentration, an advantageous / desired flow behavior can be adjusted.

Claims

claims

1. Liquid washing or cleaning agent containing

0.1 to 60% by weight of surfactant,

0.1 to 5% by weight of a graying-inhibiting polysaccharide,

0.05 to 1 wt .-% of a thickener and

1 to 20 wt .-% of an inorganic salt.

2. A liquid washing or cleaning agent according to claim 1, characterized in that the graying-inhibiting polysaccharide is selected from the group comprising carboxymethylcellulose (CMC), ether sulfonic acid salts of starch, ether sulfonic acid salts of cellulose, acid sulfuric acid ester salts of cellulose, acid sulfuric acid ester salts of starch, Methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, methyl carboxymethyl cellulose, ethyl hydroxyethyl cellulose and mixtures thereof.

3. Liquid washing or cleaning agent according to claim 2, characterized in that the polysaccharide is carboxymethylcellulose, in particular sodium carboxymethylcellulose.

4. Liquid detergent or cleaning agent according to one of claims 1 to 3 characterized

in that the inorganic salt is selected from the group comprising sodium chloride, potassium chloride, sodium sulfate, sodium carbonate, potassium sulfate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, calcium chloride, magnesium chloride and mixtures thereof.

5. Liquid detergent or cleaning agent according to one of claims 1 to 4, characterized

in that the thickener is selected from the group comprising xanthan, guar, carrageenan, agar, gellan, pectin, locust bean gum and

Mixtures thereof.

6. Liquid washing or cleaning agent according to claim 5, characterized in that the thickener is xanthan gum.

7. Liquid washing or cleaning agent according to one of claims 1 to 6 characterized

characterized in that the washing or cleaning agent further contains a cellulase.

8. Liquid washing or cleaning agent according to one of claims 1 to 7 characterized

in that the washing or cleaning agent contains an acrylic polymer.

9. Use of the washing or cleaning agent according to one of claims 1 to 8 for washing and / or cleaning of textile fabrics.

10. Use of 0.05 to 1 wt .-% of a thickener and 1 to 20 wt .-% of an inorganic salt for producing a microphase separation in a liquid detergent or cleaning agent.

11. Use according to claim 10, characterized in that the liquid washing or cleaning agent contains a graying-inhibiting polysaccharide.

12. A process for the preparation of a micro-two-phase liquid detergent or cleaning agent, containing

0.1 to 60% by weight of surfactant,

0.1 to 5% by weight of a graying-inhibiting polysaccharide and

From 0.05 to 1% by weight of a thickener,