Composition for colouring keratin fibres

1. A composition for colouring keratin fibres comprising:

a) an alkalinising agent consisting of at least one amino acid having a pKa of greater than 10.00 and at least one ester of a fatty acid and glycerol polyethoxylate; and

b) at least one oxidation colourant,

wherein said composition does not contain further alkalinising agents.

2. The composition of claim 1 , wherein said amino acid is selected from the group consisting of arginine, lysine, tyrosine and proline.

3. The composition of claim 1 , wherein said ester of fatty acid and glycerol polyethoxylate has a mean ethoxylation number of from 5 to 200 and the fatty acid residue has a saturated or unsaturated, linear or branched carbon chain having between 8 and 22 carbon atoms.

4. The composition of claim 3 , wherein said ester is can be a monoester, a diester or a triester.

5. The composition of claim 1 , wherein said ester is selected from the group consisting of Peg-90 glyceryl isostearate, Peg-30 glyceryl triisostearate, Peg-9 glyceryl laurate and Peg-8 glyceryl trilaurate.

6. The composition of claim 1 , wherein said amino acid is arginine and said ester is PEG-90 glyceryl isostearate.

7. The composition of claim 1 , wherein said oxidation colorant comprises:

(a) an oxidation colorant selected from the group consisting of 1-acetoxy-2-methylnaphthalene, 5-amino-4-chloro-o-cresol, 4-amino-m-cresol, 6-amino-m-cresol, 3-amino-2,4-dichlorophenol, 6-amino-2,4-dichloro-m-cresol, 3-amino-2,4-dichlorophenol, 5-amino-2,6-dimethoxy-3-hydroxypyridine, 5-amino-2,6-dimethoxy-3-hydroxypyridine, 3-amino-2,6-dimethylphenol, 2-amino-5-ethylphenol, 5-amino-4-fluoro-2-methylphenol sulphate, 2-amino-4-hydroxy-ethylaminoanisole, 2-amino-4-hydroxyethylaminoanisole, 2-amino-3-hydroxypyridine, 4-amino-2-hydroxytoluene, 2-aminomethyl-p-aminophenol, 4-amino-2-nitrodiphenylamine-2′-carboxylic acid, m-aminophenol, o-aminophenol, p-aminophenol, 1,3-bis-(2,4-diaminophenoxy)propane, 4,6-bis(2-hydroxyethoxy)-m-phenylenediamine, 2,6-bis(2-hydroxyethoxy)-3,5-pyridinediamine, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, 4-chloro-2-aminophenol, 2-chloro-p-phenylenediamine, 4-chlororesorcinol, N-cyclopentyl-m-aminophenol, 3,4-diaminobenzoic acid, 4,5-diamino-1-((4-chlorophenyl)methyl)-1H-pyrazole-sulphate, 2,3-diaminodihydropyrazolo pyrazolone dimethosulphonate, 2,4-diaminodiphenylamine, 4,4′-diaminodiphenylamine, 2,4-diamino-5-methylphenetole, 2,4-diamino-5-methylphenoxyethanol, 4,5-diamino-1-methylpyrazole, 2,4-diaminophenol, 2,4-diaminophenoxyethanol, 2,6-diaminopyridine, 2,6-diamino-3-((pyridin-3-yl)azo)pyridine, N,N-diethyl-m-aminophenol, N,N-diethyl-p-phenylenediamine, N,N-diethyltoluene-2,5-diamine, 2,6-dihydroxy-3,4-dimethylpyridine, 2,6-dihydroxyethylaminotoluene, dihydroxyindole, dihydroxyindoline, 2,6-dimethoxy-3,5-pyridinediamine, m-dimethylaminophenyl urea, N,N-dimethyl-p-phenylenediamine, 2,6-dimethyl-p-phenylenediamine, N,N-dimethyl 2,6-pyridinediamine, 4-ethoxy-m-phenylenediamine, 3-ethylamino-p-cresol, 4-fluoro-6-methyl-m-phenylenediamine, 1-hexyl 4,5-diamino pyrazole sulphate, hydroquinone, hydroxyanthraquinoneaminopropyl methyl morpholinium methosulphate, hydroxybenzomorpholine, hydroxyethoxy aminopyrazolopyridine, hydroxyethylaminomethyl-p-aminophenol, 1-hydroxyethyl 4,5-diamino pyrazole, hydroxyethyl-2,6-dinitro-p-anisidine, hydroxyethyl-3,4-methylenedioxyaniline, hydroxyethyl-p-phenylenediamine, 2-hydroxyethyl picramic acid, 6-hydroxyindole, hydroxypropyl bis(N-hydroxyethyl-p-phenylenediamine), hydroxypropyl-p-phenylenediamine, hydroxypyridinone, isatin, N-isopropyl 4,5-diamino pyrazole, N-methoxyethyl-p-phenylenediamine, 6-methoxy-2-methylamino-3-aminopyridine, 2-methoxymethyl-p-aminophenol, 2-methoxymethyl-p-phenylenediamine, 2-methoxy-p-phenylenediamine, 6-methoxy-2,3-pyridinediamine, 4-methoxytoluene-2,5-diamine, p-methylaminophenol, 4-methylbenzyl 4,5-diamino pyrazole, 2,2′-methylenebis 4-aminophenol, 3,4-methylenedioxyaniline, 3,4-methylenedioxyphenol, 2-methyl-5-hydroxyethylaminophenol, methylimidazoliumpropyl p-phenylenediamine, 2-methyl-1-naphthol, 2-methylresorcinol, 1,5-naphthalenediol, 1,7-naphthalenediol, 2,3-naphthalenediol, 2,7-naphthalenediol, 1-naphthol, 2-naphthol, PEG-3 2,2′-di-p-phenylenediamine, p-phenetidine, m-phenylenediamine, p-phenylenediamine, phenyl methyl pyrazolone, N-phenyl-p-phenylenediamine, picramic acid, pyrocatechol, pyrogallol, resorcinol, sodium picramate, tetraaminopyrimidine, tetrahydro-6-nitroquinoxaline, tetrahydropyranyl, resorcinol, toluene-2,5-diamine, toluene-2,6-diamine, toluene-3,4-diamine, 2,5,6-triamino-4-pyrimidinol, and 1,2,4-trihydroxybenzene, or

(b) a cosmetically acceptable salt of an oxidation colorant of (a).

8. The composition of claim 1 , further comprising a neutralising agent.

9. The composition of claim 8 , wherein said neutralising agent comprises a sodium hydroxide, potassium hydroxide, urea, allantoin, tripotassium phosphate, sodium saccharin or a combination thereof,

wherein said neutralising agent is present in at least an amount sufficient to neutralise acidic ingredients present in the dye.

10. The composition of claim 1 , in a form selected from the group consisting of oil-in-water emulsion (O/W), water-in-oil emulsion (W/O), biphasic liquid, gel, oil, aerosol and mousse.

11. A Ready-to-use composition for colouring hair, comprising: (a) a composition of claim 1 ; and (b) an activator.

12. A Kit for colouring hair, comprising a composition of claim 1 and an activator.

13. The Kit of claim 12 , wherein said activator is present in an amount of between 0.1 and 50 wt. % of the final dye.

14. A Method for dying a hair, comprising the following steps:

(a) mixing the composition of claim 1 with an oxidative solution;

(b) subsequently applying it to the hair;

(c) subsequently rinsing it off; and (d) drying the hair.

15. A Method for dying a hair, comprising: applying the composition of claim 1 to the hair;

wherein optionally the method further comprises subsequently rinsing the hair off; and optionally the method further comprises drying the hair.

16. The composition of claim 1 , wherein the keratin fibres are human hair keratin fibres.

17. The composition of claim 1 , wherein the composition does not contain ammonia or an alkanolamine.

18. The composition of claim 1 , wherein the composition further comprises: an aliphatic mono or poly-alcohol with low molecular weight, or an ester or ether thereof; an emulsifier; a wetting agent, a surfactant, a thickener; a conditioning agent; an electrolyte; an antioxidant; a protein derivative, a provitamin, a vitamin, a plant extract, sugar, betaine, a fatty amide, a sequestrant, a film-forming agent, a preservative or a combination thereof.

19. The method of claim 14 , further comprising washing the hair with shampoo before drying the hair.

20. A composition for colouring keratin fibres comprising:

a) an alkalinising agent consisting of at least one amino acid having a pKa of greater than 10.00 and at least one ester of a fatty acid and glycerol polyethoxylate; and

b) at least one oxidation colourant, wherein said composition does not contain further alkalinising agents,

wherein said ester is selected from the group consisting of Peg-90 glyceryl isostearate, Peg-30 glyceryl triisostearate, Peg-9 glyceryl laurate and Peg-8 glyceryl trilaurate.

21. A composition for colouring keratin fibres comprising:

a) an alkalinising agent consisting of at least one amino acid having a pKa of greater than 10.00 and at least one ester of a fatty acid and glycerol polyethoxylate; and

b) at least one oxidation colourant, wherein said composition does not contain further alkalinising agents,

wherein said at least one amino acid comprises an arginine and said ester is PEG-90 glyceryl isostearate.