Patent ID: 6733539
Filing Date: 2004-05-11
Classification: A61K,A61Q

Abstract:
Ready-to-use composition for the oxidation dyeing of keratinous fibers, comprising, in a medium suitable for dyeing:(a) at least one oxidation dye chosen from the pyridines of formula (I), and acid addition salts thereof: wherein: R1 is chosen from a (C1-C4)alkyl group, a (C1-C4)monohydroxyalkyl group, and a (C2-C4)polyhydroxyalkyl group, R2 is chosen from a (C1-C4)alkoxy group, a (C1-C4)monohydroxyalkoxy group, a (C2-C4)polyhydroxyalkoxy group, an amino group, a mono(C1-C4)alkylamino group, a di-(C1-C4)alkylamino group, a monophenylamino group, a monohydroxyphenylamino group, a monoalkoxyphenylamino group, a monohydroxy(C1-C4)alkylamino group, a dihydroxy-(C1-C4)alkylamino group, a monohydroxy-(C2-C4)alkylamino group, a dihydroxy-(C2-C4)alkylamino group, a (C1-C4)alkylmonohydroxy-(C1-C4)alkylamino group and a (C1-C4)alkylpolyhydroxy(C2-C4)alkylamino group, R3 is chosen from a hydrogen atom, an amino group, a mono(C1-C4)alkylamino group, a monohydroxy(C1-C4)alkylamino group and a mono(polyhydroxy(C2-C4)alkyl)amino group; provided that: when R2 is chosen from a (C1-C4)alkoxy group, a (C1-C4)monohydroxyalkoxy group and a (C2-C4)polyhydroxyalkoxy group, then R3 is a hydrogen atom; and further provided that the at least one oxidation dye can be 2,6-dimethoxy-3,5-diaminopyridine; and (b) at least one enzymatic oxidizing agent chosen from: (i) a system comprising at least one 2-electron oxidoreductase and its corresponding at least one donor, (ii) at least one 4-electron oxidoreductase, and (iii) at least one peroxidase.