Patent ID: 7658770
Filing Date: 2010-02-09
Classification: A61K,A61Q

Abstract:
1. A keratin dyeing composition comprising: (a) a medium suitable for dyeing; (b) at least one azodye of the general formula (I): wherein X is selected from the group consisting of oxygen, sulfur, N—R3 and C—R4; Y is selected from the group consisting of C—R5, nitrogen, N—R6, sulfur and oxygen; Z is C—R7 or nitrogen; with the proviso that the heterocycle of the formula (I) comprises at least two and at most three heteroatoms, where the heterocycle has at most one sulfur atom or one oxygen atom; n is an integer from 1 to 6; R1 is selected from the group consisting of hydrogen, a saturated or unsaturated (C R2, R4, R5 and R7 may be identical or different and, independently of one another, are selected from the group consisting of hydrogen, a halogen atom, a saturated or unsaturated (C or if Y and Z are C—R5 and C—R7, the radical groups R5 and R7, together with the remaining molecule, can form a heterocyclic or carbocyclic, saturated or unsaturated, substituted or unsubstituted ring system; or if X and Y are C—R4 and C—R5, the radical groups R4 and R5, together with the remaining molecule, can form a heterocyclic or carbocyclic, saturated or unsaturated, substituted or unsubstituted ring system; R3 and R6 may be identical or different and, independently of one another, are selected from the group consisting of a saturated or unsaturated (C Q+ represents an aromatic or non aromatic, substituted or unsubstituted 4- to 6-membered heterocyclic quaternary ammonium group, which may contain other heteroatoms selected from the group consisting of nitrogen, sulfur and oxygen, with the proviso that the cationic heterocycle comprises at most three heteroatoms, where the heterocycle has at most one sulfur atom or oxygen atom; or the radical group R1, together with Q+, can form a 5 or 6-membered unsaturated heterocyclic, substituted or unsubstituted cationic ring system; the anion An- is an organic or inorganic acid anion and (c) at least one additional direct dye which is selected from the group consisting of nitro dyes, azodyes, anthraquinone dyes, triphenylmethane dyes, basic dyes and acidic dyes.