EP3218464B1 - Detergents and cleaning agents having improved performance - Google Patents

Description

The present invention relates to the use of certain quinoline derivatives in detergents to improve the washing performance.

While the formulation of powdered, bleach-containing detergents and cleaners today no longer causes any problems, the formulation of stable liquid, bleach-containing detergents and cleaners is still a problem dar. Due to the usual lack of bleaching agents in liquid detergents and cleaning agents such Stains, which are usually removed in particular due to the bleach contained, often removed only inadequate. A similar problem also exists for bleach-free color detergents in which the bleaching agent is omitted in order to protect the dyes in the textile and to prevent their bleaching. In the absence of bleaching agents, it is aggravating that instead of removing the so-called bleachable soils which are normally at least partially removed by the peroxygen-based bleaching agent, on the contrary, intensification and / or worsening of the removability of the soiling is often brought about by the washing process may be due to initiated chemical reactions, which may for example in the polymerization of certain dyes contained in the stains.

Such problems occur especially with stains containing polymerizable substances. The polymerizable substances are, above all, polyphenolic dyes, preferably flavonoids, in particular from the class of anthocyanidins or anthocyanins. The stains may have been caused in particular by food products or beverages containing corresponding dyes. The stains can be, in particular, stains of fruits or vegetables or even red wine stains, which in particular contain polyphenolic dyes, especially those from the class of anthocyanidins or anthocyanins.

From the international patent application WO 2011/023716 A1 For example, the use of gallic acid esters such as propyl gallate in detergents and cleaners for improved removal of soils containing polymerizable substances is known.

The European patent application EP 0 132 765 A1 discloses metal detergent containing, in addition to nonionic and / or anionic surfactant and aminocarboxylates, compounds having a five-membered ring having 1 N atom and 1 S atom or 3 S atoms, or a hydroxyquinoline derivative.

The American patent application US 2002/011584 A1 discloses aqueous liquid laundry detergent containing optionally 8-hydroxy-5-sulfoquinolines.

The use of N-atom optionally substituted with organic groups, such as the methyl, ethyl, propyl, phenyl, naphthyl or carboxyethyl group, substituted 4-pyridinones for the removal of stains from textiles is known from the international patent application WO 2007/042140 A2 known.

Surprisingly, it has now been found that the use of 8-hydroxyquinoline sulfonic acids can markedly improve the washing or cleaning performance of the washing or cleaning agent, in particular with regard to bleachable soiling.

in der R¹, R², R³, R⁴, R⁵ und R⁶ unabhängig voneinander für Wasserstoff oder SO₃X stehen mit der Maßgabe, dass mindestens 1 der genannten Reste R¹ bis R⁶ nicht Wasserstoff ist, und X für Wasserstoff, ein Alkalimetall oder Ammonium steht,A first subject of the present invention is therefore the use of compounds of general formula (I),

in which R ¹ , R ² , R ³ , R ⁴ , R ⁵ and R ⁶ independently of one another are hydrogen or SO ₃ X, with the proviso that at least 1 of said radicals R ¹ to R ^{6 is} not hydrogen, and X is Is hydrogen, an alkali metal or ammonium,

in liquid laundry detergents containing builders and no oxidative bleaches for improving the washing or cleaning performance of bleachable soils.

The bleachable stains usually contain polymerizable substances, in particular polymerizable dyes, wherein the polymerizable dyes are preferably polyphenolic dyes, in particular flavonoids, especially anthocyanidins or anthocyanins or oligomers of these compounds. In addition to removing stains in the colors green, yellow, red or blue, stains in intermediate colors, in particular violet, purple, brown, purple or pink, as well as stains, which are green, yellow, red and violet, come into consideration Purple, brown, purple, pink or blue tint, without essentially being made entirely of this color itself. The colors mentioned can also be light or dark in each case. These are preferably stains, in particular stains of grass, fruits or vegetables, in particular stains caused by food products, such as Spices, sauces, chutneys, curries, purees and marmalades, or beverages, such as coffee, tea, wines and juices containing corresponding green, yellow, red, purple, purple, brown, purple, pink and / or blue dyes.

The stains to be removed according to the invention can be caused in particular by cherry, morelle, grape, apple, pomegranate, aronia, plum, sea buckthorn, acai, kiwi, mango, grass, or berries, especially by red or black currants, elderberries, blackberries, raspberries , Blueberries, cranberries, cranberries, strawberries or blueberries, with coffee, tea, red cabbage, blood orange, eggplant, tomato, carrot, beetroot, spinach, paprika, red meat or potato, or red onion.

In the compounds of general formula (I) are preferably 1 to 4, in particular 1 to 2 SO ₃ X - substituents. Preferably, R ^{4 is} an SO ₃ X substituent. Preferred alkali metals for X are sodium and potassium and mixtures thereof. Among the ammonium ions for X are in addition to NH ₄ ⁺ and a total of 1 to 4 C _1-12 alkyl groups and / or C _2-5 hydroxyalkyl groups carrying ammonium groups.

The use according to the invention of the compound of the general formula (I) is preferably carried out in detergents by adding them in an amount of from 0.01% by weight to 10% by weight, in particular in an amount of 0.05% by weight. to 5 wt .-%, is used, wherein here and below, the information of "wt .-%" each relate to the weight of the total detergent. Another object of the invention is therefore a liquid laundry detergent containing no oxidative bleach containing builders and a compound of general formula (I) in an amount of preferably 0.01 wt .-% to 10 wt .-%, in particular 0, 05 wt .-% to 5 wt .-%, wherein the above or below described preferred embodiments also apply to this subject of the invention. Such an agent is employed in conventional automated or manual washing processes in which soiled laundry is exposed to an aqueous liquor containing the agent with the aim of removing the soiling from the textile surface.

By the feature that the detergent does not contain any oxidative bleaches is to be understood that the agent contains no oxidative bleaching agents in the narrower sense, to which hypochlorites, hydrogen peroxide or hydrogen peroxide-yielding substances and peroxyacids are to be expected; preferably, it also has no bleach activators and / or bleach catalysts.

In addition to the active substance essential to the invention, the detergents may contain other usual constituents of textile detergents, in particular those selected from the group of surfactants and preferably polymers, enzymes, disintegration aids, fragrances and perfume carriers.

The builders include in particular the zeolites, silicates, carbonates, organic cobuilders and - if there are no ecological prejudices against their use - also the phosphates.

The finely crystalline zeolite containing synthetic and bound water is preferably zeolite A and / or zeolite P. Zeolite P is, for example, zeolite MAP® (commercial product from Crosfield). Also suitable, however, are zeolite X and mixtures of zeolite A, X and / or P. Commercially available and usable in the context of the present invention is, for example, also a cocrystal of zeolite X and zeolite A (about 80% by weight of zeolite X) ), by the formula

nNa ₂ O • (1-n) K ₂ O • Al ₂ O ₃ • (2 - 2.5) SiO ₂ • (3.5-5.5) H ₂ O

can be described. The zeolite can be used both as a builder in a granular compound, as well as for a kind of "powdering" of a granular mixture, preferably a mixture to be compressed, usually both ways for incorporating the zeolite are used in the premix. Zeolites may have an average particle size of less than 10 μm (volume distribution, Coulter Counter method) and preferably contain from 18% to 22% by weight, in particular from 20% to 22% by weight, of bound water.

It is also possible to use crystalline layer-form silicates of the general formula NaMSi _x O _{2x + 1} .yH ₂ O, in which M represents sodium or hydrogen, x is a number from 1.9 to 22, preferably from 1.9 to 4, Particularly preferred values for x are 2, 3 or 4, and y is a number from 0 to 33, preferably from 0 to 20. The crystalline layer-form silicates of the formula NaMSi _x O _{2x + 1} .yH ₂ O are sold, for example, by the company Clariant GmbH (Germany) under the trade name Na-SKS. Examples of these silicates are Na-SKS-1 (Na ₂ Si ₂₂ O ₄₅ .xH ₂ O, Kenyaite), Na-SKS-2 (Na ₂ Si ₁₄ O ₂₉ .xH ₂ O, magadiite), Na-SKS -3 (Na ₂ Si ₈ O ₁₇ .xH ₂ O) or Na-SKS-4 (Na ₂ Si ₄ O _{9 .xH 2} O, Makatite).

Preference is given to crystalline phyllosilicates of the formula NaMSi _x O _{2x + 1} .yH ₂ O, in which x is 2. In particular, both β- and δ-sodium are Na ₂ Si ₂ O ₅ .yH ₂ O and furthermore especially Na-SKS-5 (α-Na ₂ Si ₂ O ₅ ), Na-SKS-7 (β-Na ₂ Si ₂ O _5, natrosilite), Na-SKS-9 (NaHSi ₂ O ₅ · H ₂ O), Na-SKS-10 (NaHSi ₂ O ₅ · 3 H ₂ O, kanemite), Na-SKS-11 ( t-Na ₂ Si ₂ O ₅ ) and Na-SKS-13 (NaHSi ₂ O ₅ ), but especially Na-SKS-6 (δ-Na ₂ Si ₂ O ₅ ). Washing or cleaning agents preferably contain a weight fraction of the crystalline layered silicate of the formula NaMSi _x O _{2x + 1} · y H ₂ O of from 0.1% by weight to 20% by weight, preferably from 0.2% by weight 15 wt .-% and in particular from 0.4 wt .-% to 10 wt .-%.

It is also possible to use amorphous sodium silicates with a Na ₂ O: SiO ₂ modulus of from 1: 2 to 1: 3.3, preferably from 1: 2 to 1: 2.8 and in particular from 1: 2 to 1: 2.6, which preferably Iöseverzögert and have secondary washing properties. The dissolution delay compared with conventional amorphous sodium silicates may have been caused in various ways, for example by surface treatment, compounding, compaction / densification or by overdrying. The term "amorphous" is understood to mean that the silicates do not yield sharp X-ray reflections typical of crystalline substances in X-ray diffraction experiments, but at most cause one or more maxima of the scattered X-rays having a width of several degrees of diffraction angle.

Alternatively or in combination with the abovementioned amorphous sodium silicates, it is possible to use X-ray-amorphous silicates whose silicate particles produce blurred or even sharp diffraction maxima in electron diffraction experiments. This is to be interpreted as meaning that the products have microcrystalline regions of the size of ten to a few hundred nm, with values of up to max. 50 nm and in particular up to max. 20 nm are preferred. Such X-ray amorphous silicates also have a dissolution delay compared to the conventional water glasses. Particularly preferred are compacted / compacted amorphous silicates, compounded amorphous silicates and overdried X-ray amorphous silicates.

These silicate (s), preferably alkali metal silicates, particularly preferably crystalline or amorphous alkali metal disilicates, if present, are present in detergents or cleaners in amounts of from 3% by weight to 60% by weight, preferably 8% by weight. % to 50 wt .-% and in particular from 20 wt .-% to 40 wt .-%.

It is also possible to use the generally known phosphates as builders, if such use is not to be avoided for ecological reasons. Of the large number of commercially available phosphates, the alkali metal phosphates, with particular preference of pentasodium and Pentakaliumtriphosphat (sodium and potassium tripolyphosphate) in the detergent and cleaning industry have the greatest importance.

Alkali metal phosphates is the summary term for the alkali metal (especially sodium and potassium) salts of various phosphoric acids, in which one can distinguish metaphosphoric acids (HPO ₃ ) _n and orthophosphoric H ₃ PO _{4 in} addition to higher molecular weight representatives. The phosphates combine several advantages: They act as alkali carriers, prevent limescale deposits on machine parts and lime incrustations in fabrics and also contribute to the cleaning performance. Technically particularly important phosphates are the pentasodium triphosphate, Na ₅ P ₃ O ₁₀ (sodium tripolyphosphate) and the corresponding potassium salt pentapotassium triphosphate, K ₅ P ₃ O ₁₀ (potassium tripolyphosphate). Preference is furthermore given to using the sodium potassium tripolyphosphates. If phosphates are used in detergents or cleaners, preferred agents comprise these phosphate (s), preferably alkali metal phosphate (s), more preferably pentasodium or pentapotassium triphosphate (sodium or potassium tripolyphosphate), in amounts of from 5% to 80 wt .-%, preferably from 15 wt .-% to 75 wt .-% and in particular from 20 wt .-% to 70 wt .-%.

Further usable are alkali carriers. Suitable alkali carriers are, for example, alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates, alkali metal sesquicarbonates, the alkali silicates mentioned, alkali metal silicates and mixtures of the abovementioned substances, preference being given to using the alkali metal carbonates, in particular sodium carbonate, sodium bicarbonate or sodium sesquicarbonate. Particularly preferred may be a builder system containing a mixture of tripolyphosphate and sodium carbonate. Because of their low chemical compatibility with the other ingredients of detergents or cleaning agents compared with other builders, the alkali metal hydroxides are usually only in small amounts, preferably in amounts below 10 wt .-%, preferably below 6 wt .-%, more preferably below 4 Wt .-% and in particular below 2 wt .-%, used. Particularly preferred are agents which, based on their total weight, contain less than 0.5% by weight and in particular no alkali metal hydroxides. Preference is given to the use of carbonate (s) and / or bicarbonate (s), preferably alkali metal carbonate (s), more preferably sodium carbonate, in amounts of from 2% to 50%, preferably from 5% to 40% and more preferably from 7.5% to 30% by weight wt .-%.

Particularly suitable organic builders are polycarboxylates / polycarboxylic acids, polymeric polycarboxylates, aspartic acid, polyacetals, dextrins and also phosphonates. Useful are, for example, the polycarboxylic acids which can be used in the form of the free acid and / or their sodium salts, polycarboxylic acids meaning those carboxylic acids which carry more than one acid function. These are, for example, citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, aminocarboxylic acids, nitrilotriacetic acid (NTA), if such use is not objectionable for ecological reasons, and mixtures of these. In addition to their builder effect, the free acids also typically have the property of an acidifying component and thus also serve to set a lower and milder pH of detergents or cleaners. In particular, citric acid, succinic acid, glutaric acid, adipic acid, gluconic acid and any desired mixtures of these can be mentioned here. Further suitable builders are polymeric polycarboxylates, for example the alkali metal salts of polyacrylic acid or polymethacrylic acid, for example those having a relative molecular mass of from 500 g / mol to 70000 g / mol. Particularly suitable are polyacrylates which preferably have a molecular weight of from 2000 g / mol to 20 000 g / mol. Because of their superior solubility, the short-chain polyacrylates, which have molecular weights of from 2000 g / mol to 10000 g / mol, and particularly preferably from 3000 g / mol to 5000 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. Copolymers of acrylic acid with maleic acid which contain 50% by weight to 90% by weight of acrylic acid and 50% by weight to 10% by weight of maleic acid have proven to be particularly suitable. Their relative molecular weight, based on free acids, is generally from 2000 g / mol to 70000 g / mol, preferably from 20 000 g / mol to 50 000 g / mol and in particular from 30 000 g / mol to 40 000 g / mol. To improve the water solubility, the polymers may also contain allylsulfonic acids such as allyloxybenzenesulfonic acid and methallylsulfonic acid as a monomer. The (co) polymeric polycarboxylates can be used as a solid or in aqueous solution. The content of detergents or cleaning agents in (co) polymeric polycarboxylates is preferably from 0.5% by weight to 20% by weight and in particular from 3% by weight to 10% by weight.

Also particularly preferred are biodegradable polymers of more than two different monomer units, for example those containing as monomers salts of acrylic acid and maleic acid and vinyl alcohol or vinyl alcohol derivatives or the salts of acrylic acid as monomers and the 2-alkylallylsulfonic acid and sugar derivatives. Other preferred copolymers are those which have as monomers acrolein and acrylic acid / acrylic acid salts or acrolein and vinyl acetate. Also to be mentioned as further preferred builders polymeric aminodicarboxylic acids, their salts or their precursors. Particularly preferred are polyaspartic acids and / or their salts.

Another class of substances with builder properties are the phosphonates. These are the salts of, in particular, hydroxyalkane or aminoalkanephosphonic acids. Among the hydroxyalkanephosphonic acids, 1-hydroxyethane-1,1-diphosphonic acid (HEDP) is of particular importance. It is used in particular as the sodium salt, the disodium salt neutral and the tetrasodium salt alkaline. Particularly suitable aminoalkanephosphonic acids are ethylenediaminetetramethylenephosphonic acid (EDTMP), diethylenetriaminepentamethylenephosphonic acid (DTPMP) and their higher homologs. They are used in particular in the form of the neutral-reacting sodium salts, for example as the hexasodium salt of EDTMP or as the hepta- and octa-sodium salt of DTPMP. Mixtures of the mentioned phosphonates can also be used as organic builders. In particular, the aminoalkanephosphonates also have a pronounced heavy metal binding capacity.

Further suitable builder substances are polyacetals which can be obtained by reacting dialdehydes with polyolcarboxylic acids which have 5 to 7 C atoms and at least 3 hydroxyl groups. Preferred polyacetals are obtained from dialdehydes such as glyoxal, glutaraldehyde, terephthalaldehyde and mixtures thereof and from polyol carboxylic acids such as gluconic acid and / or glucoheptonic acid.

Other suitable organic builders are dextrins, for example oligomers or polymers of carbohydrates, which can be obtained by partial hydrolysis of starches. The hydrolysis can be carried out by customary, for example acid or enzyme catalyzed processes. Preferably, it is hydrolysis products having average molecular weights in the range of 400 g / mol to 500000 g / mol. In this case, a polysaccharide with a dextrose equivalent (DE) in the range from 0.5 to 40, in particular from 2 to 30 is preferred, DE being a common measure of the reducing action of a polysaccharide compared to dextrose, which has a DE of 100 , is. Usable are both maltodextrins with a DE between 3 and 20 and dry glucose syrups with a DE between 20 and 37 and so-called yellow dextrins and white dextrins with higher molecular weights in the range from 2000 g / mol to 30,000 g / mol. The oxidized derivatives of such dextrins are their reaction products with oxidizing agents which are capable of oxidizing at least one alcohol function of the saccharide ring to the carboxylic acid function.

Oxydisuccinates and other derivatives of disuccinates, preferably ethylenediamine disuccinate, are other suitable co-builders. In this case, ethylenediamine-N, N'-disuccinate (EDDS) is preferably used in the form of its sodium or magnesium salts. Also preferred in this context are glycerol disuccinates and glycerol trisuccinates. If desired, suitable amounts are in particular in zeolite-containing and / or silicate-containing formulations at 3 wt .-% to 15 wt .-%.

Other useful organic cobuilders are, for example, acetylated hydroxycarboxylic acids and their salts, which may optionally also be present in lactone form and which contain at least 4 carbon atoms and at least one hydroxyl group and a maximum of two acid groups.

In addition, all compounds capable of forming complexes with alkaline earth ions can be used as builders.

Detergents and cleaners may contain nonionic, anionic, cationic and / or amphoteric surfactants.

As nonionic surfactants, it is possible to use all nonionic surfactants known to the person skilled in the art. Detergents or cleaning agents with particular preference contain nonionic surfactants from the group of alkoxylated alcohols. 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 may contain linear and methyl-branched radicals in the mixture, as they are usually present in Oxoalkoholresten. In particular, however, alcohol ethoxylates with linear radicals of alcohols of natural origin having 12 to 18 carbon atoms, for example of coconut, palm, tallow or oleyl alcohol, and on average 2 to 8 moles of EO per mole of alcohol are preferred. The preferred ethoxylated alcohols include, for example, C _12-14 alcohols with 3 EO or 4 EO, C _9-11 alcohols with 7 EO, C _13-15 alcohols with 3 EO, 5 EO, 7 EO or 8 EO, C _12-18 alcohols with 3 EO, 5 EO or 7 EO and mixtures of these, such as mixtures of C _12-14 -alcohol with 3 EO and C _12-18 -alcohol with 5 EO. The stated degrees of ethoxylation represent statistical averages, which may correspond to a particular product of an integer or a fractional number. Preferred alcohol ethoxylates have a narrow homolog distribution (narrow range ethoxylates, NRE).

Alternatively or in addition to these nonionic surfactants, it is also possible to use fatty alcohols with more than 12 EO. Examples include tallow fatty alcohol with 14 EO, 25 EO, 30 EO or 40 EO. In addition, as further nonionic surfactants and alkyl glycosides of the general Formula RO (G) _x are used in which R is a primary straight-chain or methyl-branched, in particular 2-methyl-branched aliphatic radical having 8 to 22, preferably 12 to 18 carbon atoms and G is the symbol which is a glykoseeinheit with 5 or 6 carbon atoms, preferably glucose. The degree of oligomerization x, which indicates the distribution of monoglycosides and oligoglycosides, is any number between 1 and 10; preferably x is 1.2 to 1.4.

Another class of preferred nonionic surfactants used either as the sole nonionic surfactant or in combination with other nonionic surfactants are alkoxylated, preferably ethoxylated or ethoxylated and propoxylated fatty acid alkyl esters, preferably having from 1 to 4 carbon atoms in the alkyl chain.

Nonionic surfactants of the amine oxide type, for example N-cocoalkyl-N, N-dimethylamine oxide and N-tallowalkyl-N, N-dihydroxyethylamine oxide, and the fatty acid alkanolamides can also be used. The amount of these nonionic surfactants is preferably not more than that of the ethoxylated fatty alcohols, especially not more than half thereof.

in der R für einen aliphatischen Acylrest mit 6 bis 22 Kohlenstoffatomen, R¹ für Wasserstoff, einen Alkyl- oder Hydroxyalkylrest mit 1 bis 4 Kohlenstoffatomen und [Z] für einen linearen oder verzweigten Polyhydroxyalkylrest mit 3 bis 10 Kohlenstoffatomen und 3 bis 10 Hydroxylgruppen steht. Bei den Polyhydroxyfettsäureamiden handelt es sich um bekannte Stoffe, die üblicherweise durch reduktive Aminierung eines reduzierenden Zuckers mit Ammoniak, einem Alkylamin oder einem Alkanolamin und nachfolgender Acylierung mit einer Fettsäure, einem Fettsäurealkylester oder einem Fettsäurechlorid erhalten werden können. Zur Gruppe der Polyhydroxyfettsäureamide gehören auch Verbindungen der Formel

in der R für einen linearen oder verzweigten Alkyl- oder Alkenylrest mit 7 bis 12 Kohlenstoffatomen, R¹ für einen linearen, verzweigten oder zyklischen Alkylrest oder einen Arylrest mit 2 bis 8 Kohlenstoffatomen und R² für einen linearen, verzweigten oder zyklischen Alkylrest oder einen Arylrest oder einen Oxy-Alkylrest mit 1 bis 8 Kohlenstoffatomen steht, wobei C_1-4-Alkyl oder Phenylreste bevorzugt sind und [Z] für einen linearen Polyhydroxyalkylrest steht, dessen Alkylkette mit mindestens zwei Hydroxylgruppen substituiert ist, oder alkoxylierte, vorzugsweise ethoxylierte oder propoxylierte Derivate dieses Restes. [Z] wird vorzugsweise durch reduktive Aminierung eines reduzierten Zuckers erhalten, beispielsweise Glucose, Fructose, Maltose, Lactose, Galactose, Mannose oder Xylose. Die N-Alkoxy- oder N-Aryloxy-substituierten Verbindungen können durch Umsetzung mit Fettsäuremethylestern in Gegenwart eines Alkoxids als Katalysator in die gewünschten Polyhydroxyfettsäureamide überführt werden.Further suitable surfactants are polyhydroxy fatty acid amides of the formula

wherein R is an aliphatic acyl radical having 6 to 22 carbon atoms, R ^{1 is} hydrogen, an alkyl or hydroxyalkyl radical having 1 to 4 carbon atoms and [Z] is a linear or branched polyhydroxyalkyl radical having 3 to 10 carbon atoms and 3 to 10 hydroxyl groups. The polyhydroxy fatty acid amides are known substances which can usually be obtained by reductive amination of a reducing sugar with ammonia, an alkylamine or an alkanolamine and subsequent acylation with a fatty acid, a fatty acid alkyl ester or a fatty acid chloride. The group of polyhydroxy fatty acid amides also includes compounds of the formula

R is a linear or branched alkyl or alkenyl radical having 7 to 12 carbon atoms, R ^{1 is} a linear, branched or cyclic alkyl radical or an aryl radical having 2 to 8 carbon atoms and R ^{2 is} a linear, branched or cyclic alkyl radical or an aryl radical or an oxy-alkyl radical having 1 to 8 carbon atoms, with C _1-4 alkyl or phenyl radicals being preferred and [Z] being a linear polyhydroxyalkyl radical whose alkyl chain is substituted by at least two hydroxyl groups, or alkoxylated, preferably ethoxylated or propoxylated derivatives this rest. [Z] is preferably obtained by reductive amination of a reduced sugar, for example glucose, fructose, maltose, lactose, galactose, mannose or xylose. The N-alkoxy- or N-aryloxy-substituted compounds can be converted into the desired polyhydroxy fatty acid amides by reaction with fatty acid methyl esters in the presence of an alkoxide as catalyst.

In cleaning agents are nonionic surfactants from the group of alkoxylated alcohols, more preferably from the group of mixed alkoxylated alcohols and in particular from the group of EO / AO / EO-nonionic surfactants, or the PO / AO / PO nonionic surfactants, especially the PO / EO / PO nonionic surfactants are particularly preferred. Such PO / EO / PO nonionic surfactants are characterized by good foam control.

As anionic surfactants, for example, those of the sulfonate type and sulfates are used. The surfactants of the sulfonate type are preferably C _9-13 -alkylbenzenesulfonates, olefinsulfonates, ie mixtures of alkene and hydroxyalkanesulfonates and disulfonates, as are obtained, for example, from C _12-18 -monoolefins having terminal or internal double bonds by sulfonation with gaseous sulfur trioxide and subsequent alkaline or acid hydrolysis of the sulfonation products into consideration. Also suitable are alkanesulfonates which are obtained from C _12-18 alkanes, for example by sulfochlorination or sulfoxidation with subsequent hydrolysis or neutralization. Likewise, 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 are suitable.

Further suitable anionic surfactants are sulfated fatty acid glycerol esters. Fatty acid glycerol esters are to be understood as meaning the mono-, di- and triesters and mixtures thereof, as obtained in the preparation by esterification of a monoglycerol with 1 to 3 moles of fatty acid or in the transesterification of triglycerides with 0.3 to 2 moles of glycerol. Preferred sulfated fatty acid glycerol esters are the sulfonation products of saturated fatty acids having 6 to 22 carbon atoms, for example caproic acid, caprylic acid, capric acid, myristic acid, lauric acid, palmitic acid, stearic acid or behenic acid.

Alk (en) ylsulfates are the alkali metal salts and, in particular, the sodium salts of the sulfuric monoesters of C ₁₂ -C ₁₈ fatty alcohols, for example coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol or the C ₁₀ -C ₂₀ oxoate kyote and those half-esters of secondary alcohols of these chain lengths are preferred. Also preferred are alk (en) ylsulfates of the mentioned Chain length, which contain a synthetic, petrochemical-based straight-chain alkyl radical, which have an analogous degradation behavior as the adequate compounds based on oleochemical raw materials. Of washing technology interest, the C ₁₂ -C ₁₆ alkyl sulfates and C ₁₂ -C ₁₅ alkyl sulfates and C ₁₄ -C ₁₅ alkyl sulfates are preferred.

The sulfuric acid monoesters of straight-chain or branched C _7-21 -alcohols ethoxylated with from 1 to 6 mol of ethylene oxide, such as 2-methyl-branched C _9-11- alcohols having on average 3.5 mol of ethylene oxide (EO) or C _12-18 . Fettatkohote with 1 to 4 EO, are suitable. Due to their high foaming behavior, they are only used in detergents in relatively small amounts, for example in amounts of from 1% by weight to 5% by weight.

Further suitable anionic surfactants are also the salts of alkylsulfosuccinic acid, which are also referred to as sulfosuccinates or as sulfosuccinic acid esters and which are monoesters and / or diesters of sulfosuccinic acid with alcohols, preferably fatty alcohols and in particular ethoxylated fatty alcohols. Preferred sulfosuccinates contain C _8-18 fatty alcohol residues or mixtures of these. Particularly preferred sulfosuccinates contain a fatty alcohol residue derived from ethoxylated fatty alcohols, which by themselves are nonionic surfactants. Sulfosuccinates, whose fatty alcohol residues are derived from ethoxylated fatty alcohols with a narrow homolog distribution, are again particularly preferred. Likewise, it is also possible to use alk (en) ylsuccinic acid having preferably 8 to 18 carbon atoms in the alk (en) yl chain or salts thereof.

As further anionic surfactants are particularly soaps into consideration. Suitable are saturated 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 of natural fatty acids, e.g. Coconut, palm kernel or tallow fatty acids, derived soap mixtures.

The anionic surfactants, including the soaps, may be in the form of their sodium, potassium or ammonium salts and as soluble salts of organic bases, such as mono-, di- or triethanolamine. The anionic surfactants are preferably present in the form of their sodium or potassium salts, in particular in the form of the sodium salts.

Instead of the surfactants mentioned or in conjunction with them, it is also possible to use cationic and / or amphoteric surfactants.

worin jede Gruppe R¹ unabhängig voneinander ausgewählt ist aus C_1-6-Alkyl-, -Alkenyl- oder -Hydroxyalkylgruppen; jede Gruppe R² unabhängig voneinander ausgewählt ist aus C_8-28-Alkyl- oder -Alkenylgruppen; R³ = R¹ oder (CH₂)_n-T-R²; R⁴ = R¹ oder R² oder (CH₂)_n-T-R²; T = -CH₂-, -O-CO- oder -CO-O- und n eine ganze Zahl von 0 bis 5 ist.As cationic active substances, for example, cationic compounds of the following formulas can be used:

wherein each R ^{1 group is} independently selected from C _1-6 alkyl, alkenyl or hydroxyalkyl groups; each R ^{2 group is} independently selected from C _8-28 alkyl or alkenyl groups; R ³ = R ¹ or (CH ₂ ) _n -TR ² ; R ⁴ = R ¹ or R ² or (CH ₂ ) _n -TR ² ; T = -CH ₂ -, -O-CO- or -CO-O- and n is an integer from 0 to 5.

Textile softening compounds can be used to care for the textiles and to improve the textile properties such as a softer feel and reduced electrostatic charge (increased wearing comfort) The active ingredients of these formulations are quaternary ammonium compounds having two hydrophobic radicals, such as the disteraryldimethylammonium chloride, however because of its insufficient biodegradability increasingly replaced by quaternary ammonium compounds containing ester groups in their hydrophobic residues as predetermined breaking points for biodegradation.

Such "esterquats" with improved biodegradability are obtainable, for example, by esterifying mixtures of methyldiethanolamine and / or triethanolamine with fatty acids and then quaternizing the reaction products in a manner known per se with alkylating agents. Further suitable as a finish is dimethylolethyleneurea.

Enzymes can be used to increase the performance of detergents or cleaners. These include in particular proteases, amylases, lipases, hemicellulases, cellulases, perhydrolases or oxidoreductases, and preferably mixtures thereof. These enzymes are basically of natural origin; Starting from the natural molecules, improved variants are available for use in detergents and cleaning agents, which are preferably used accordingly become. Detergents or cleaning agents contain enzymes preferably in total amounts of 1 × 10 ^-6 wt .-% to 5 wt .-% based on active protein. The protein concentration can be determined by known methods, for example the BCA method or the biuret method.

Among the proteases, those of the subtilisin type are preferable. Examples of these are the subtilisins BPN 'and Carlsberg and their further developed forms, the protease PB92, the subtilisins 147 and 309, the alkaline protease from Bacillus lentus, subtilisin DY and the enzymes thermitase which can no longer be assigned to the subtilisins in the narrower sense, Proteinase K and the proteases TW3 and TW7.

Examples of usable amylases are the α-amylases from Bacillus licheniformis, from B. amyloliquefaciens, from B. stearothermophilus, from Aspergillus niger and A. oryzae, as well as the further developments of the abovementioned amylases, which have been improved for use in detergents and cleaners. Furthermore, for this purpose, the α-amylase from Bacillus sp. A 7-7 (DSM 12368) and the cyclodextrin glucanotransferase (CGTase) from B. agaradherens (DSM 9948).

It is possible to use lipases or cutinases because of their triglyceride-splitting activity. These include, for example, the lipases originally obtainable from Humicola lanuginosa (Thermomyces lanuginosus) or further developed therefrom, in particular those with the amino acid exchange D96L. Furthermore, for example, the cutinases can be used, which have been originally isolated from Fusarium solani pisi and Humicola insolens. It is also possible to use lipases and / or cutinases whose initial enzymes were originally isolated from Pseudomonas mendocina and Fusarium solanii.

Furthermore, enzymes can be used, which are summarized by the term hemicellulases. These include, for example, mannanases, xanthan lyases, pectin lyases (= pectinases), pectin esterases, pectate lyases, xyloglucanases (= xylanases), pullulanases and β-glucanases.

If desired, oxidoreductases, for example oxidases, oxygenases, catalases, peroxidases, such as halo, chloro, bromo, lignin, glucose or manganese peroxidases, dioxygenases or laccases (phenol oxidases, polyphenol oxidases) can be used to increase the bleaching effect. Advantageously, it is additionally preferred to add organic, particularly preferably aromatic, compounds which interact with the enzymes in order to enhance the activity of the relevant oxidoreductases (enhancers) or to ensure the flow of electrons (mediators) at greatly varying redox potentials between the oxidizing enzymes and the soils.

The enzymes can be used in any form known in the art. These include, for example, the solid preparations obtained by granulation, extrusion or lyophilization or, especially in the case of liquid or gel-form detergents, solutions of the enzymes, advantageously as concentrated as possible, sparing in water and / or added with stabilizers. Alternatively, the enzymes may be encapsulated for both the solid and liquid dosage forms, for example by spray-drying or extruding the enzyme solution together with a preferably natural polymer or in the form of capsules, for example those in which the enzymes are entrapped as in a solidified gel or in those of the core-shell type, in which an enzyme-containing core is coated with a water, air and / or chemical impermeable protective layer. In deposited layers, further active ingredients, for example stabilizers, emulsifiers, pigments, bleaches or dyes, may additionally be applied. Such capsules are applied by methods known per se, for example by shaking or rolling granulation or in fluid-bed processes. Advantageously, such granules, for example by applying polymeric film-forming agent, low in dust and storage stable due to the coating. Furthermore, it is possible to assemble two or more enzymes together so that a single granule has several enzyme activities.

Preference is given to one or more enzymes and / or enzyme preparations, preferably protease preparations and / or amylase preparations, in amounts of from 0.1% by weight to 5% by weight, preferably from 0.2% by weight to 4 , 5 wt .-% and in particular from 0.4 wt .-% to 4 wt .-%, used.

As perfume oils or fragrances, individual perfume compounds, for example synthetic products of the ester type, ethers, aldehydes, ketones, alcohols and hydrocarbons can be used. Preferably, however, mixtures of different fragrances are used, which together produce an attractive fragrance. Such perfume oils may also contain natural fragrance mixtures such as those available from vegetable sources, for example pine, citrus, jasmine, patchouly, rose or ylang-ylang oil. In order to be perceptible, a fragrance must be volatile, whereby besides the nature of the functional groups and the structure of the chemical compound, the molecular weight also plays an important role. Thus, most fragrances have molecular weights up to about 200 g / mol, while molar masses of 300 g / mol and above are more of an exception. Due to the different volatility of fragrances, the odor of a perfume or fragrance composed of several fragrances changes during evaporation, whereby the odor impressions in "top note", "middle note, body" as well as " Base note "(end note, dry out). Since odor perception is also largely based on odor intensity, the top note of a perfume or fragrance does not consist solely of volatile compounds, while the base note is for the most part consists of less volatile, ie adherent fragrances. For example, in the composition of perfumes, more volatile fragrances can be bound to certain fixatives, preventing them from evaporating too quickly. In the subsequent classification of the fragrances in "more volatile" or "adherent" fragrances so nothing about the olfactory impression and whether the corresponding fragrance is perceived as the head or middle note, nothing said. The fragrances can be processed directly, but it can also be advantageous to apply the fragrances on carriers that provide a slower fragrance release for long-lasting fragrance. As such carrier materials, for example, cyclodextrins have been proven, the cyclodextrin-perfume complexes can be additionally coated with other excipients.

When choosing the colorant, it must be taken into account that the colorants can have a high storage stability and insensitivity to light as well as not too high an affinity for textile surfaces and, in particular, for synthetic fibers. At the same time it should also be considered that colorants may have different stabilities to oxidation. In general, water-insoluble colorants are more stable to oxidation than water-soluble colorants. Depending on the solubility and thus also on the sensitivity to oxidation, the concentration of the colorant in the detergents or cleaners varies. In the case of readily water-soluble colorants, colorant concentrations in the range of a few 10 ^-2 % by weight to 10 ^-3 % by weight are typically selected. On the other hand, in the case of the pigment dyes preferred in particular because of their brilliance, but less readily water-soluble, the suitable concentration of the colorant in detergents or cleaners is typically from about 10 ^-3 % by weight to 10 ^-4 % by weight. Dyeing agents which can be oxidatively destroyed in the washing process and mixtures thereof with suitable blue dyes, so-called blue toners, are preferred. It has proven to be advantageous to use colorants which are soluble in water or at room temperature in liquid organic substances. Suitable examples are anionic colorants, for example anionic nitrosofarbstoffe.

In addition to the components mentioned so far, the detergents or cleaning agents may contain further ingredients which further improve the performance and / or aesthetic properties of these agents. Preferred agents contain one or more of the group of electrolytes, pH adjusters, fluorescers, hydrotropes, foam inhibitors, silicone oils, anti redeposition agents, optical brighteners, grayness inhibitors, anti-shrinkage agents, anti-crease agents, color transfer inhibitors, antimicrobial agents, germicides, fungicides, antioxidants, antistatic agents, ironing aids , Phobic and impregnating agents, swelling and anti-slip agents and UV absorbers.

As electrolytes from the group of inorganic salts, a wide number of different salts can be used. Preferred cations are the alkali and alkaline earth metals, preferred anions are the halides and sulfates. From a manufacturing point of view, the use of NaCl or MgCl ₂ in the washing or cleaning agents is preferred.

In order to bring the pH of detergents or cleaners into the desired range, the use of pH adjusters may be indicated. Applicable here are all known acids or alkalis, unless their use is prohibited for application or environmental reasons or for reasons of consumer protection. Usually, the amount of these adjusting agents does not exceed 1% by weight of the total formulation.

Suitable foam inhibitors are soaps, oils, fats, paraffins or silicone oils, which may optionally be applied to support materials. Suitable carrier materials are, for example, inorganic salts such as carbonates or sulfates, cellulose derivatives or silicates and mixtures of the abovementioned materials. In the context of the present application preferred agents include paraffins, preferably unbranched paraffins (n-paraffins) and / or silicones, preferably linear-polymeric silicones, which are constructed according to the scheme (R ₂ SiO) _x and are also referred to as silicone oils. These silicone oils usually are clear, colorless, neutral, odorless, hydrophobic liquids having a molecular weight between 1000 g / mol and 150000 g / mol and viscosities between 10 mPa.s and 1000000 mPa.s.

Suitable soil repellents are known from the prior art polymers of phthalic acid and / or terephthalic acid and derivatives thereof, in particular polymers of ethylene terephthalate and / or polyethylene glycol terephthalate or anionic and / or nonionic modified derivatives of these in question. Especially preferred of these are the sulfonated derivatives of the phthalic and terephthalic acid polymers.

Optical brighteners may in particular be added to the detergents in order to eliminate graying and yellowing of the treated textiles. These fabrics impinge on the fiber and cause whitening and bleaching by transforming invisible ultraviolet radiation into visible longer wavelength light, emitting the ultraviolet light absorbed from the sunlight as faint bluish fluorescence and the yellow color of the gray or yellowed wash pure white results. Suitable compounds are derived, for example, from the substance classes of 4,4'-diamino-2,2'-stilbenedisulfonic acids (flavonic acids), 4,4'-distyrylbiphenyls, methylumbelliferones, coumarins, dihydroquinolinones, 1,3-diarylpyrazolines, naphthalimides, benzoxazole , Benzisoxazole and benzimidazole systems as well as heterocyclic substituted pyrene derivatives.

Grayness inhibitors have the task of keeping the dirt detached from the fiber suspended in the liquor and thus preventing the dirt from being rebuilt. Water-soluble colloids of mostly organic nature are suitable for this purpose, for example the water-soluble salts of polymeric carboxylic acids, glue, gelatin, salts of ether sulfonic acids or cellulose or salts of acidic sulfuric acid esters of cellulose or starch. Also, water-soluble polyamides containing acidic groups are suitable for this purpose. Furthermore, soluble starch preparations can be used, for example degraded starch and aldehyde starches. Polyvinylpyrrolidone is also useful. Also usable as graying inhibitors are cellulose ethers such as carboxymethylcellulose (sodium salt), methylcellulose, hydroxyalkylcellulose and mixed ethers such as methylhydroxyethylcellulose, methylhydroxypropylcellulose, methylcarboxymethylcellulose and mixtures thereof. Particularly suitable are, for example, nonionic cellulose ethers such as methylcellulose and methylhydroxypropylcellulose with a proportion of methoxy groups of 15 to 30 wt .-% and of hydroxypropyl groups of 1 to 15 wt .-%, each based on the nonionic cellulose ether.

Since textile fabrics, in particular of rayon, rayon, cotton and their mixtures, can tend to wrinkle because the individual fibers are sensitive to bending, buckling, pressing and crushing transversely to the fiber direction, synthetic anti-crease agents can be used. These include, for example, synthetic products based on fatty acids, fatty acid esters, fatty acid amides, alkylol esters, -alkylolamides or fatty alcohols, which are usually reacted with ethylene oxide, or products based on lecithin or modified phosphoric acid ester.

Phobic and impregnation processes are used to furnish textiles with substances that prevent the deposition of dirt or facilitate its leaching ability. Preferred repellents and impregnating agents are perfluorinated fatty acids, also in the form of their aluminum and zirconium salts, organic silicates, silicones, polyacrylic acid esters with perfluorinated alcohol component or with perfluorinated acyl or sulfonyl radical coupled polymerizable compounds. Antistatic agents may also be included. The antisoiling equipment with repellents and impregnating agents is often classified as an easy-care finish. The penetration of the impregnating agent in the form of solutions or emulsions of the active substances in question can be facilitated by adding wetting agents which reduce the surface tension. A further field of application of repellents and impregnating agents is the water-repellent finish of textiles, tents, tarpaulins, leather, etc., in which, in contrast to waterproofing, the fabric pores are not closed, so the fabric remains breathable (hydrophobing). The water repellents used for hydrophobizing coat textiles, leather, paper, wood, etc. with a very thin layer of hydrophobic groups, such as longer alkyl chains or siloxane groups. Suitable water repellents are, for example, paraffins, waxes, metal soaps, etc. with additives on aluminum or zirconium salts, quaternary ammonium compounds with long-chain alkyl radicals, urea derivatives, fatty acid-modified melamine resins, chromium complex salts, silicones, tin-organic compounds and glutaric dialdehyde and perfluorinated compounds. The hydrophobized materials do not feel greasy; nevertheless, similar to greasy substances, water droplets emit from them without moistening. For example, silicone-impregnated textiles have a soft feel and are water and dirt repellent; Stains from ink, wine, fruit juices and the like are easier to remove.

Antimicrobial agents can be used to combat microorganisms. Depending on the antimicrobial spectrum and mechanism of action, a distinction is made between bacteriostats and bactericides, fungistatics and fungicides and so on. Substances from these groups are, for example, benzalkonium chlorides, alkylaryl sulfonates, halophenols and phenol mercuriacetate, wherein it is also possible to dispense entirely with these compounds.

To prevent undesirable changes to the detergents and / or the treated textiles caused by atmospheric oxygenation and other oxidative processes, the agents may contain antioxidants. This class of compounds includes, for example, substituted phenols, hydroquinones, catechols and aromatic amines, as well as organic sulfides, polysulfides, dithiocarbamates, phosphites and phosphonates.

Increased comfort may result from the additional use of antistatic agents. Antistatic agents increase the surface conductivity and thus allow an improved drainage of formed charges. External antistatic agents are generally substances with at least one hydrophilic molecule ligand and give a more or less hygroscopic film on the surfaces. These mostly surface-active antistatic agents can be subdivided into nitrogen-containing (amines, amides, quaternary ammonium compounds), phosphorus-containing (phosphoric acid esters) and sulfur-containing (alkyl sulfonates, alkyl sulfates) antistatic agents. Lauryl (or stearyl) dimethylbenzylammonium chlorides are also suitable as antistatics for textiles and as an additive to detergents, wherein additionally a softening effect is achieved.

To improve the water absorbency, the rewettability of the treated textiles and to facilitate the ironing of the treated textiles, silicone derivatives can be used in laundry detergents. These additionally improve the rinsing out of detergents or cleaning agents by their foam-inhibiting properties. Preferred silicone derivatives are, for example, polydialkyl or alkylaryl siloxanes in which the alkyl groups have one to five carbon atoms and are completely or partially fluorinated. Preferred silicones are polydimethylsiloxanes, which may optionally be derivatized and are then amino-functional or quaternized or Si-OH, Si-H and / or Si-Cl bonds. Further preferred silicones are the polyalkylene oxide-modified polysiloxanes, ie polysiloxanes which comprise, for example, polyethylene glycols, and the polyalkylene oxide-modified dimethylpolysiloxanes.

Finally, it is also possible to use UV absorbers which are applied to the treated textiles and improve the light resistance of the fibers. Compounds having these desired properties include, for example, the non-radiative deactivating compounds and derivatives of benzophenone having substituents in the 2- and / or 4-position. Also suitable are substituted benzotriazoles, phenyl-substituted acrylates (cinnamic acid derivatives) in the 3-position, optionally with cyano groups in the 2-position, salicylates, organic Ni complexes and natural substances such as umbelliferone and the body's own urocanic acid.

Protein hydrolyzates are due to their fiber-care effect other suitable active substances. Protein hydrolysates are product mixtures obtained by acid, alkaline or enzymatically catalyzed degradation of proteins (proteins). Protein hydrolysates of both vegetable and animal origin can be used. Animal protein hydrolysates are, for example, elastin, collagen, keratin, silk and milk protein protein hydrolysates, which may also be present in the form of salts. Preference is given to the use of protein hydrolysates of plant origin, for example soybean, almond, rice, pea, potato and wheat protein hydrolysates. Although the use of the protein hydrolyzates is preferred as such, other amino acid mixtures or individual amino acids obtained otherwise, such as, for example, arginine, lysine, histidine or pyroglutamic acid, may also be used in their place. Also possible is the use of derivatives of protein hydrolysates, for example in the form of their fatty acid condensation products.

Examples

Washing tests were carried out at 40 ° C. with the standardized soiling on cotton given in Table 1 using a bleach-free liquid detergent V1 (dosage 69 g to 17 l of water of 16 ° dH) and a mixture M1 of detergent V1 and 8-hydroxy-5 quinolinesulfonic acid (compound A)

(Dosage 69 g V1 and 1 g A to 17 l of water of 16 ° dH). After drying the cotton cloths, their brightness was determined by means of the color distance measurement according to the L * a * b * values and the Y values calculated therefrom as a measure of the brightness. Table 1 shows the differences in difference values dY resulting from the difference Y (after washing) -Y (before washing) between M1 and V1. Table 1: Difference in brightness difference soiling M1 red wine 2.6 grass 2.5 salad dressing 2.7 Blackcurrant juice 3.1 Blueberry juice 4.9

The brightness differences when using the substance essential to the invention were significantly greater than those resulting from the use of the substance-free comparative detergent, which corresponds to a higher whiteness and thus improved stain removal.

Claims (9)

1. The use of compounds of general formula (I),

   

   in which R¹, R², R³, R⁴, R⁵ and R⁶ represent, independently of one another, hydrogen or SO₃X, with the proviso that at least 1 of the mentioned functional groups R¹ to R⁶ is not hydrogen, and X represents hydrogen, an alkali metal or ammonium,

   in liquid laundry detergents containing builders and no oxidative bleaching agents to improve the washing or cleaning performance against bleachable stains.
2. The use according to claim 1, characterized in that the stains contain polymerizable substances, selected from polyphenolic dyes, in particular flavonoids, more particularly dyes from the class of anthocyanidins or anthocyanins or oligomers, of said compounds.
3. The use according to claim 1 or 2, characterized in that the improved washing or cleaning performance consists in improved removal of green, yellow, red, blue, violet, lilac, brown, purple or pink stains, in particular marks from grass, fruits or vegetables, in particular stains caused by food products, such as spices, sauces, chutneys, curries, purees and jams, or beverages, such as coffee, tea, wines and juices, which contain corresponding green, yellow, red, violet, lilac, brown, purple, pink and/or blue dyes.
4. The use according to one of claims 1 to 3, characterized in that the stains are selected from stains caused by cherries, morellos, grapes, apples, pomegranates, chokeberries, plums, sea buckthorns, acai berries, kiwis, mangoes, grass or berries, in particular caused by redcurrants, blackcurrants, elderberries, blackberries, raspberries, blueberries, lingonberries, cranberries, strawberries or bilberries, or by coffee, tea, red cabbage, blood orange, eggplant, tomato, carrot, beetroot, spinach, bell pepper, red or blue potato or red onion.
5. A liquid laundry detergent, which does not contain any oxidative bleaching agent, containing builders and a compound of general formula (I),

   

   in which R¹, R², R³, R⁴, R⁵ and R⁶ represent, independently of one another, hydrogen or SO₃X, with the proviso that at least 1 of the mentioned functional groups R¹ to R⁶ is not hydrogen, and X represents hydrogen, an alkali metal or ammonium.
6. The detergent according to claim 5, characterized in that it contains 0.01 wt.% to 10 wt.%, in particular 0.05 wt.% to 5 wt.% of a compound of general formula (I).
7. The detergent according to claim 5 or 6, characterized in that it contains, in addition to the compound of general formula (I), further constituents of laundry detergents, selected from the group of surfactants.
8. The use according to one of claims 1 to 4 or the detergent according to one of claims 5 to 7, characterized in that, in the compounds of general formula (I), 1 to 4, in particular 1 to 2, SO₃X substituents are contained.
9. The use or the detergent according to one of the preceding claims, characterized in that, in the compound of formula I, R⁴ is a SO₃X substituent.