Hair dyeing composition

Abstract

The present invention is directed to a composition A for dyeing of fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising a) one or more azo dye(s), b) one or more guanidine compound(s), and / or their salt(s), and / or their mixtures, c) one or more non-sulfate anionic surfactant(s).

Description

[0001] HAIR DYEING COMPOSITION

[0002] Field of the invention

[0003] The present invention is directed to dyeing compositions for fibers, preferably to hair dyeing compositions. Additionally, a method for dyeing and a dyeing product is disclosed.

[0004] Background of the invention

[0005] Hair coloring is a common practice and especially fashionable colors are subject to rapid change. In particular, clients prefer to change colors multiple times or combine hair coloring with other chemical processes such as perms or bleaches. As a result, the hair of long-haired clients in particular has different areas of damage along the hair fiber. Especially with colorful azo dyes, dye absorption is highly dependent on the condition of the hair fiber. Damaged parts of the hair may show a stronger update resulting in a more intense hair color. Thus, the homogeneity of hair color along the fiber may not be given, leading to customer dissatisfaction.

[0006] Therefore, it is necessary to develop hair dye compositions, products and methods that improve the homogeneity of hair dyeing with azo dyes.

[0007] The prior art has not yet found the ideal solution.

[0008] Summary of the invention

[0009] Therefore, the first object of the present invention is a composition A for dyeing of fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising: a) one or more azo dye(s), b) one or more guanidine compound(s), and / or their salt(s), and / or their mixtures, c) one or more non-sulfate anionic surfactant(s).

[0010] The second object of the present invention is a dyeing product for fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, having at least:

[0011] - a composition B comprising one or more compound(s) according to group a) as defined in any of the claims 1 to 12, - a composition C comprising one or more compound(s) according to group b) and one or more compound(s) according to group c) as defined in any of the claims 1 to 12.

[0012] The third object of the present invention is a method for dyeing fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising the steps of: i) applying to the fibers a composition A as defined above or mixing a composition B with a composition C as defined above to yield a mixture having a pH in the range of 7 to 12, ii) leaving the ready-to-use composition onto the fibers for a time period in the range of 1 to 60 min, iii) optionally rinsing-off the fibers and optionally drying the fibers.

[0013] Detailed description of the invention

[0014] The inventors of the present invention unexpectedly found that the composition for dyeing, the product, and the method according to the independent claims resulted in dyed fibers with better homogeneity and selectivity. In addition, the dyed fibers were found to have an improved dyeing intensity, in particular on damaged fibers.

[0015] Dyeing composition

[0016] The present invention is directed to a composition A for dyeing of fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising: a) one or more azo dye(s), b) one or more guanidine compound(s), and / or their salt(s), and / or their mixtures, c) one or more non-sulfate anionic surfactant(s).

[0017] It is preferred from the viewpoint of dyeing intensity that one or more compound(s) according to group a) is / are HC Red 18, HC Blue 18, HC Yellow 16, Disperse Black 9, Acid Black 1 , Disperse Orange 3, Disperse red 17, Acid black 52, Acid Red 14, Acid Orange 7, Acid Red 27, Acid Red 33, Acid Red 35, Acid Red 184, Acid Yellow 23, Acid Orange 24, Solvent Red 1 , Curry Red, Acid Red 18, Pigment Red 57, and / or their salt(s), and / or their mixtures, preferably one or more compound(s) according to group a) is / are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, and / or their salt(s), and / or their mixture(s), more preferably one or more compound(s) according to group a) is / are selected from HC Blue 18, HC Red 18, HC Yellow 16, and / or their salt(s), and / or their mixtures.

[0018] It is preferred from the viewpoint of dyeing intensity that the total concentration of compound(s) according to group a) is 0.001 % by weight or more, more preferably 0.002% by weight or more, still more preferably 0.01 % by weight or more, furthermore preferably 0.15% by weight or more, calculated to the total weight of composition A.

[0019] It is preferred from the viewpoint of environmental saving that the total concentration of compound(s) according to group a) is 10% by weight or less, more preferably 5% by weight or less, still more preferably 2% by weight or less, furthermore preferably 1 % by weight or less, calculated to the total weight of composition A.

[0020] For attaining the above-mentioned effects, it is preferred that the total concentration of compound(s) according to group a) is in the range of 0.001 % to 10% by weight, preferably in the range of 0.002% to 5% by weight, more preferably in the range of 0.01 % to 2% by weight, still furthermore preferably 0.015% to 1 % by weight, calculated to the total weight of composition A.

[0021] Composition A further comprises one or more guanidine and / or a guanidinium salt with one or more inorganic or organic acid(s), and / or their mixtures, as compound(s) according to group b).

[0022] It is preferred from the viewpoint commercial availability that the one or more compound(s) according to group b) is / are guanidine, guanidine carbonate, guanidine hydrochloride, guanidine sulfate, guanidine phosphate, guanidine citrate, guanidine lactate, guanidine malate, guanidine maleate, guanidine succinate, guanidine tosylate, and / or their mixtures, more preferably it is guanidine sulfate and / or guanidine carbonate, and / or their mixtures.

[0023] It is preferred from the viewpoint of dyeing intensity that the total concentration of compound(s) according to group b) is 0.1% by weight or more, more preferably 0.5% by weight or more, still more preferably 0.1% by weight or more, calculated to the total weight of composition A.

[0024] It is preferred from the viewpoint of product stability and dyeing intensity that the total concentration of compound(s) according to group b) is 10% by weight or less, more preferably 8% by weight or less, still more preferably 6% by weight or less, calculated to the total weight of composition A.

[0025] For attaining the above-mentioned effects, it is preferred that the total concentration of compound(s) according to group b) is in the range of 0.1 % to 10% by weight, preferably in the range of 0.5% to 8% by weight, more preferably in the range of 1% to 6% by weight, calculated to the total weight of composition A.

[0026] Composition A of the present invention comprises one or more non-sulfate anionic surfactant(s) as compound(s) according to c).

[0027] The term ‘non-sulfate’ within the meaning of the present invention denotes a surfactant, which does not carry sulfate groups.

[0028] It is preferred from the viewpoint of dyeing intensity, wash fastness, and selectivity that the one or more compound(s) according to group c) is / are one or more alkyl or alkyl ether amino acid surfactant, one or more alpha-olefin sulfonate surfactant, one or more internal olefin sulfonate surfactant, one or more isethionate surfactant, and / or their salt(s), and / or their mixtures, more preferably one or more compound(s) according to group c) is / are one or more alpha-olefin sulfonate surfactant(s), one or more internal olefin sulfonate surfactant(s), one or more sarcosinate surfactant(s), one or more glutamate surfactant(s), one or more isethionate surfactant(s), one or more ether sulfonate surfactant(s), one or more sulfosuccinate surfactant(s), one or more sulfoacetate surfactant(s), one or more glycinate surfactant(s), one or more alaninate surfactant(s), one or more carboxylate surfactant(s), one or more taurate surfactant(s), and / or their mixtures, and / or their salt(s).

[0029] The preferred surfactants are salts of cocoyl glutamate, salts of C14-C16 olefin sulfonate, salts of cocoyl isethionate, salts of cocoyl glycinate, salts of lauroyl sarcosinate, salts of cocoyl taurate, and / or their mixtures. Preferably, they are alkali or earth alkaline salts.

[0030] The most preferred surfactant according to group c) is / are one or more glutamate surfactant(s), and / or their salt(s), and or their mixture(s).

[0031] Suitable compounds are sodium lauroyl glutamate, sodium cocoyl glutamate, sodium myristyl glutamate, sodium oleyl glutamate, and / or their mixtures, and / or their salts, further suitable salts are potassium and / or triethanolamine salts. It is preferred from the viewpoint of dyeing intensity that the total concentration of compound(s) according to group c) is 0.1 % by weight or more, more preferably 0.25% by weight or more, still more preferably 0.5% by weight or more, calculated to the total weight of composition A.

[0032] It is preferred from the viewpoint of product stability and dyeing intensity that the total concentration of compound(s) according to group c) is 10% by weight or less, more preferably 7.5% by weight or less, still more preferably 5% by weight or less, calculated to the total weight of composition A.

[0033] For attaining the above-mentioned effects, it is preferred that the total concentration of compound(s) according to group c) is in the range of 0.1% to 10% by weight, preferably in the range of 0.25% to 7.5% by weight, more preferably in the range of 0.5% to 5% by weight, calculated to the total weight of composition A.

[0034] It is preferred from the viewpoint of wash fastness and homogeneity that the total concentration of sulfate surfactants in composition A is 0.5% by weight or less, preferably 0.1% by weight or less, calculated to the total weight of composition A, more preferably composition A is free of sulfate surfactants.

[0035] It is preferred from the viewpoint of wash fastness that the weight ratio of non-sulfate to sulfate compounds is 10 or more, more preferably 50 or more, most preferably 100 or more.

[0036] It is further preferred from the viewpoint of dyeing intensity that composition A comprises one or more alkalizing agent different from the ones according to group b), preferably the one or more alkalizing agent different from the ones according to group b) is ammonia and / or its salts, and / or an organic alkyl and / or alkanol amines, and / or their salt(s) according to the following general structure:

[0037] T2

[0038] Ri— N

[0039] R3wherein Ri , R2, and R3 are independently selected from H, linear Ci-Ce alkyl which may be substituted with one hydroxyl group, or branched C3-C12 alkyl or alkanol, wherein at least one of Ri, R2, or R3 is different from H, and / or their salts, and / or their mixtures, more preferably the one or more alkalizing agent different from the ones according to group b) is / are selected from ammonium hydroxide, monoethanolamine, diethanolamine, monoethanol methylamine, monoethanol dimethylamine, diethanolmethylamine, monoethanolethylamine, monoethanoldiethylamine, diethanolethylamine, monoethanolpropylamine, monoethanoldipropylamine, diethanolpropylamine, monoethanolbutylamine, diethanolbutylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, and / or its / their salt(s), and / or their mixtures.

[0040] It is preferred from the viewpoint of dyeing intensity that the total concentration of alkalizing agents different from the compound(s) according to group b) in composition A is 0.5% by weight or more, preferably 1 % by weight or more, furthermore preferably 2% by weight or more, calculated to the total weight of composition A.

[0041] It is preferred from the viewpoint of cosmetic safety that the total concentration of alkalizing agents different from the compound(s) according to group b) in composition is 30% by weight or less, preferably 20% by weight or less, furthermore preferably 15% by weight or less.

[0042] For attaining the above-mentioned effects, it is preferred that the total concentration of alkalizing agents different from the compound(s) according to group b) in composition A is in the range of 0.5% to 30% by weight, preferably 1 % to 20% by weight, more preferably 2% to 15% by weight, calculated to the total weight of composition A.

[0043] It is further preferred from the viewpoint of cosmetic safety that composition A comprises one or more thickening polymer(s), preferably one or more anionic thickening polymer(s), more preferably one or more anionic thickening polymers comprising a carbohydrate-based monomers, furthermore preferably the anionic thickening polymer is xanthan gum, dehydroxanthan gum, carboxymethylcellulose, and / or their salt(s), and / or their mixtures.

[0044] It is preferred from the viewpoint of viscosity and safety that the total concentration of thickening polymers in composition A is 0.1 % by weight or more, more preferably 0.2% by weight or more, furthermore preferably 0.5% by weight or more, calculated to the total weight of the composition A.

[0045] It is preferred from the viewpoint of viscosity and convenience that the total concentration of thickening polymers in composition A is 10% by weight or less, more preferably 8% by weight or less, furthermore preferably 5% by weight or less, calculated to the total weight of the composition A.

[0046] For attaining the above-mentioned effects, it is preferred that the total concentration of thickening polymers in composition A is in the range of 0.1 % to 10% by weight, preferably in the range of 0.2% to 8% by weight, more preferably in the range of 0.5% to 5% by weight, calculated to the total weight of the composition A.

[0047] Besides anionic thickening polymers, composition A may comprise additionally or in replacement of anionic thickening polymers one or more cationic conditioning polymer, preferably one or more Polyquaterium-6, Polyquaternium-7, Polyquaternium-16, Polyquaternium-22, Polyquaternium-53, and / or their salt(s), and / or their mixtures, more preferably composition A comprises Polyquaternium-53.

[0048] Suitably, the total concentration of cationic conditioning polymers is in the range of 0.1 % to 10% by weight, calculated to the total weight of composition A.

[0049] In a preferred aspect of the present invention, composition A comprises oxidizing agents at 1 % by weight or less, preferably at 0.5% by weight or less, more preferably at 0.1 % by weight or less, calculated to the total weight of composition A, still more preferably composition A is free of oxidizing agents.

[0050] Forms of composition A

[0051] In one aspect of the present invention, composition A is an aqueous composition comprising water at 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, calculated to the total weight of composition A.

[0052] The aqueous composition A preferably has a pH in the range of 7 to 12, more preferably in the range of 7.5 to 11 .5, still more preferably in the range of 8 to 11 .

[0053] The advantage of this aspect is that the composition A can be readily applied onto fibers, with or without prior mixing with other compositions.

[0054] In another aspect of the present invention, composition A is a powder composition, preferably a powder composition comprising water at 10% by weight or less, more preferably at 1 % by weight or less, still more preferably at 0.1 % by weight or less, calculated to the total weight of composition A, still more preferably composition A is an anhydrous powder composition, and furthermore preferably composition A comprises one or more pulverulent excipient(s). The term ‘anhydrous’ denotes a composition that is free of added water. However, this does not exclude bound water such as residual moisture or crystal water.

[0055] The term ‘excipient’ denotes a compound, which may function as filling material and dispersant for the other compounds of composition A and does not react with the dyes or the alkalizing agent, and, thus, confer the powder a high degree of storage stability over an extended period of time.

[0056] Composition A of the present invention may comprise an organic and / or an inorganic pulverulent excipient in which the dyes are dispersed.

[0057] Suitable excipients are organic and / or an inorganic pulverulent excipients such as, for example, diatomaceous earth, kaolin, bentonite, starch especially corn, tapioca, rice, wheat and potato, nylon powder, montmorillonite, gypsum, sawdust, and perlite, more preferably it is corn starch, from the viewpoint of stability.

[0058] Preferably, the total concentration of organic and / or an inorganic pulverulent excipients is 10% by weight or more, more preferably 15% by weight or more, further more preferably 20% by weight or more, still further more preferably 25% by weight or more, even further more preferably 30% by weight or more, even more preferably 55% by weight or more, calculated to the total weight of composition A, from the viewpoint of achieving good dispersibility of the direct dyes in the powder and quick dissolution of the powder.

[0059] Preferably, the total concentration of organic and / or an inorganic pulverulent excipients is 98% by weight or less, more preferably 95% by weight or less, furthermore preferably 90% by weight or less, calculated to the total weight of composition A, from the viewpoint of achieving good dispersibility of the dyes in the powder and formulation freedom.

[0060] For attaining the above mentioned effects, it is preferred that the total concentration of organic and / or an inorganic pulverulent excipients, is in the range of 10% to 98% by weight, more preferably in the range of 15% to 95% by weight, further more preferably in the range of 20% to 90% by weight, still further more preferably in the range of 25% to 90% by weight, still further more preferably in the range of 30% to 90% by weight, even more preferably in the range of 55% to 90% by weight, calculated to the total weight of composition A. Dyeing product

[0061] The present invention is also directed to a dyeing product for fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, having at least:

[0062] - a composition B comprising one or more compound(s) according to group a) as defined above,

[0063] - a composition C comprising one or more compound(s) according to group b) and one or more compound(s) according to group c) as defined above.

[0064] It is preferred from the viewpoint of dyeing intensity that the mixture of compositions B and C has a pH in the range of 7 to 12. The mixture is preferably obtained directly prior to application onto the fibers.

[0065] It is preferred from the viewpoint of creativity that the compositions B and C are kept separate until directly prior to application onto fibers.

[0066] It is further preferred that one of the compositions B and or C comprise one or more alkalizing agent(s) different from the compound(s) according to group b), as defined above for composition A. Preferably, the composition B comprises one or more alkalizing agent(s) different from the compound(s) according to group b).

[0067] In one aspect of the present invention, composition C is a liquid composition at 25°C and atmospheric pressure comprising one or more organic solvent(s). Preferably, composition C is anhydrous, from the viewpoint of dye stability.

[0068] The term ‘liquid’ denotes a physical state at 25°C and atmospheric pressure, i.e. , composition C is liquid at room temperature.

[0069] The organic solvent(s) may be selected to dissolve the dyes, i.e., compounds according to group a). Preferred solvents are mono-, di-, and trivalent alcohols and / or their mixtures.

[0070] Preferred mono-, di-, and trivalent alcohols from the viewpoint of cosmetic safety and dissolution capacity are ethanol, n-propanol, isopropanol, propylene glycol, ethylene glycol, benzyl alcohol, phenoxyethanol, and glycerol, and / or their mixtures.

[0071] It is further preferred from the viewpoint of solution stability that the total concentration of organic solvents is 75% by weight or more, more preferably 80% by weight or more, furthermore preferably 85% by weight or more, calculated to the total weight of composition C.

[0072] It is further preferred from the viewpoint of dyeing intensity that the total concentration of organic solvents is 98% by weight or less, more preferably 95% by weight or less, furthermore preferably 92% by weight or less, calculated to the total weight of composition C.

[0073] For attaining the above-mentioned effects, it is preferred that the total concentration of organic solvents is in the range of 75% to 98% by weight, more preferably 80% to 95% by weight, furthermore preferably in the range of 85% to 92% by weight, calculated to the total weight of composition C.

[0074] It is further preferred from the viewpoint of mildness that the dyeing product is a nonoxidizing hair dyeing product.

[0075] Method for dyeing

[0076] The present invention is also directed to a method for dyeing of fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising the steps of: i) applying to fibers a composition A as defined above or mixing a composition B with a composition C as defined above to yield a mixture having a pH in the range of 7 to 12, ii) leaving the ready-to-use composition onto the fibers for a time period in the range of 1 to 60 min, iii) optionally rinsing-off the fibers and optionally drying the fibers.

[0077] The composition A or mixture of compositions B and C is applied to fibers and preferably left for a time period of 5 min to 45 min in step ii), more preferably for a time period in the range of 10 min to 35 min, from the viewpoint of dyeing intensity.

[0078] Optionally, heat may be applied while leaving the composition A or the mixture of compositions B and C onto fibers. Suitable temperature ranges are 30°C to 50°C.

[0079] Preferably, the mixing ratio by weight of compositions B and C in step i) is in the range of 1 : 1 to 1 :20, preferably in the range of 1 :2 to 1 : 15, more preferably in the range of 1 :4 to 1 : 12, still more preferably in the range of 1 :5 to 1 : 10. The following examples are to illustrate the present invention, but not to limit it.

[0080] XAMPLES able 1 he following compositions were prepared by conventional mixing techniques. Equimolar concentration

[0081] able 2 he following compositions were prepared by conventional mixing techniques. Equimolar concentration

[0082] able 3 he following compositions were prepared by conventional mixing techniques. Equimolar concentration

[0083] Results

[0084] The AE*a,b difference between untreated and permed hair (s. Table 1-3) was lower for the non-sulfate surfactants (Inv. ex. 1-16) in comparison to sodium lauryl sulfate (Com. ex. 1-3). This results in better homogeneity. This improvement was independent of the washing of the fibers.

[0085] Methods

[0086] Hair perming

[0087] Goat hair (10 cm long, 1 g per bundle) was purchased from International Hair Importers, Glendale, NY, USA. The hair was shampooed prior to treatment.

[0088] A perming composition comprising a reducing agent commercially available under the trade name Goldwell Structure and Shine was applied to the hair and left for 30 min at ambient temperature. The reducing composition was rinsed-off with lukewarm water and an oxidizing composition was applied for 20 min. The hair was then rinsed-off and blow-dried.

[0089] Hair dyeing

[0090] 1 g of the hair streaks, either untreated or permed, were completely immersed in 10 g of the dyeing compositions from table 1 and left for 2 min at 40°C. Then the hair streaks were rinsed off with water, and blow-dried.

[0091] Wash fastness

[0092] The dyed hair streaks were placed in a water bath comprising 3.5% by weight of sodium laureth sulfate for 10 min. Then the hair streaks were rinsed-off with water and blow dried.

[0093] Color measurement

[0094] Lab values were measured after dyeing or placing the streaks in the surfactant bath with a Datacolor 45G instrument. AE was calculated as the difference between color uptake of untreated (2) vs. permed hair (1) or wash-out of untreated (2) vs. permed hair (1), respectively. The following examples are within the scope of the present invention. Example 17

[0095] % by weight

[0096] HC Blue 18 0.02

[0097] HC Red 18 0.02

[0098] HC Yellow 16 0.015 Guanidine sulfate 3.0

[0099] Sodium cocoyl glutamate 3.0

[0100] NaOH / citric acid q.s. ad pH 10.0

[0101] Water ad 100.0

Claims

Claims1 . A composition A for dyeing of fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising: a) one or more azo dye(s), b) one or more guanidine compound(s), and / or their salt(s), and / or their mixtures, c) one or more non-sulfate anionic surfactant(s).

2. The composition according to claim 1 characterized in that the one or more compound(s) according to group a) is / are HC Red 18, HC Blue 18, HC Yellow 16, Disperse Black 9, Acid Black 1 , Disperse Orange 3, Disperse red 17, Acid black 52, Acid Red 14, Acid Orange 7, Acid Red 27, Acid Red 33, Acid Red 35, Acid Red 184, Acid Yellow 23, Acid Orange 24, Solvent Red 1 , Curry Red, Acid Red 18, Pigment Red 57, and / or their salt(s), and / or their mixtures, preferably the one or more compound(s) according to group a) is / are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, and / or their salt(s), and / or their mixture(s), more preferably the one or more compound(s) according to group a) is / are selected from HC Blue 18, HC Red 18, HC Yellow 16, and / or their salt(s), and / or their mixtures.

3. The composition according to any of the claims 1 and / or 2 characterized in that the total concentration of compound(s) according to group a) is in the range of 0.001 % to 10% by weight, preferably in the range of 0.002% to 5% by weight, more preferably in the range of 0.01 % to 2% by weight, still furthermore preferably 0.015% to 1 % by weight, calculated to the total weight of composition A.

4. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group b) is / are guanidine and / or a guanidinium salt with one or more inorganic or organic acid(s), and / or their mixtures, preferably the one or more compound(s) according to group b) is are guanidine, guanidine carbonate, guanidine hydrochloride, guanidine sulfate, guanidine phosphate, guanidine citrate, guanidine lactate, guanidine malate, guanidine maleate, guanidine succinate, guanidine tosylate, and / or their mixtures, preferably it is guanidine sulfate and / or guanidine carbonate, and / or their mixtures.

5. The composition according to any of the preceding claims characterized in that the total concentration of one or more compound(s) according to group b) is in the range of 0.1 % to 10% by weight, preferably in the range of 0.5% to 8% by weight, morepreferably in the range of 1 % to 6% by weight, calculated to the total weight of the composition A.

6. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group c) is / are one or more alkyl or alkyl ether amino acid surfactant, one or more alpha-olefin sulfonate surfactant, one or more internal olefin sulfonate surfactant, one or more isethionate surfactant, and / or their salt(s), and / or their mixtures, preferably one or more compound(s) according to group c) is / are one or more alpha-olefin sulfonate surfactant(s), one or more internal olefin sulfonates surfactant(s), one or more sarcosinate surfactant(s), one or more glutamate surfactant(s), one or more isethionate surfactant(s), one or more ether sulfonate surfactant(s), one or more sulfosuccinate surfactant(s), one or more sulfoacetate surfactant(s), one or more glycinate surfactant(s), one or more alaninate surfactant(s), one or more carboxylate surfactant(s), one or more taurate surfactant(s), and / or their mixtures, and / or their salt(s), more preferably one or more compound according to group c) is / are one or more glutamate surfactant(s), and / or their salt(s), and or their mixture(s).

7. The composition according to any of the preceding claims characterized in that the total concentration of one or more compound(s) according to group c) is in the range of 0.1 % to 10% by weight, preferably in the range of 0.25% to 7.5% by weight, more preferably in the range of 0.5% to 5% by weight, calculated to the total weight of composition A.

8. The composition according to any of the preceding claims characterized in that the total concentration of sulfate surfactants in composition A is 0.5% by weight or less, preferably 0.1 % by weight or less, calculated to the total weight of composition A, more preferably composition A is free of sulfate surfactants.

9. The composition according to any of the preceding claims characterized in that composition A comprises one or more alkalizing agent different from the ones according to group b), preferably the one or more alkalizing agent different from the ones according to group b) is ammonia and / or its salts, and / or an organic alkyl and / or alkanol amines, and / or their salt(s) according to the following general structure:wherein Ri , R2, and R3 are independently selected from H, linear Ci-Ce alkyl which may be substituted with one hydroxyl group, or branched C3-C12 alkyl or alkanol, wherein at least one of Ri, R2, or R3 is different from H, and / or their salts, and / or their mixtures, more preferably the one or more alkalizing agent different from the ones according to group b) is / are selected from ammonium hydroxide, monoethanolamine, diethanolamine, monoethanol methylamine, monoethanol dimethylamine, diethanolmethylamine, monoethanolethylamine, monoethanoldiethylamine, diethanolethylamine, monoethanolpropylamine, monoethanoldipropylamine, diethanolpropylamine, monoethanolbutylamine, diethanolbutylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, and / or its / their salt(s), and / or their mixtures.

10. The composition according to any of the preceding claims characterized in that composition A comprises one or more thickening polymer(s), preferably one or more anionic thickening polymer(s), more preferably one or more anionic thickening polymers comprising carbohydrate-based monomers, furthermore preferably the anionic thickening polymer is xanthan gum, dehydroxanthan gum, carboxymethylcellulose, and / or their salt(s), and / or their mixtures.11 . The composition according to any of the preceding claims characterized in that composition A is an aqueous composition comprising water at 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, calculated to the total weight of composition A, and preferably composition A has a pH in the range of 7 to 12, more preferably in the range of 7.5 to 11 .5, still more preferably in the range of 8 to 11.

12. The composition according to any of the claims 1 to 10 characterized in that composition A is a powder composition, preferably a powder composition comprising water at 10% by weight or less, more preferably at 1 % by weight or less, still more preferably at 0.1 % by weight or less, calculated to the total weight of composition A, still more preferably composition A is an anhydrous powder composition, and furthermore preferably composition A comprises one or more pulverulent excipient(s).

13. A dyeing product for fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, having at least:- a composition B comprising one or more compound(s) according to group a) as defined in any of the claims 1 to 12, - a composition C comprising one or more compound(s) according to group b) and one or more compound(s) according to group c) as defined in any of the claims 1 to 12.

14. The product according to claim 13 characterized in that it is a non-oxidizing hair dyeing product.

15. A method for dyeing of fibers, preferably keratin fibers, more preferably human keratin fibers, still more preferably human hair, comprising the steps of: i) applying to fibers a composition A as defined in any of the claims 1 to 12 or mixing a composition B with a composition C as defined in the claims 13 and / or 14 to yield a ready-to-use composition having a pH in the range of 7 to 12, ii) leaving the ready-to-use composition onto the fibers for a time period in the range of 1 to 60 min, iii) optionally rinsing-off the fibers and optionally drying the fibers.

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