Patent ID: 7329289
Filing Date: 2008-02-12
Classification: A61K,A61Q

Abstract:
1. A process for dyeing keratin fibers, comprising applying to the keratin fibers a dyeing composition comprising at least one direct dye chosen from a triarylmethane-based compound of formula (Ia): in which: R 1 , R 2 and R 3 are, independently of each other, chosen from a hydrogen atom, a linear or branched, substituted or unsubstituted C 1 -C 24 alkyl or C 2 -C 24 alkenyl or alkynyl radical, a substituted or unsubstituted benzyl radical, a substituted or unsubstituted aryl radical or an aromatic or nonaromatic, and a substituted or unsubstituted heterocycle radical; R 4 is chosen from a hydrogen atom and a substituted or unsubstituted amino group; R 5 is a group —CR 6 R 7 — in which R 6 and R 7 are, independently of each other, chosen from a hydrogen atom, a linear or branched, substituted or unsubstituted C 1 -C 24 alkyl radical, which can cyclize, a substituted or unsubstituted benzyl radical and a substituted or unsubstituted aryl radical; n is chosen from 0 and 1; and the dye of formula (Ia) optionally having at least one other substituent, a radical being said to be substituted when it bears at least one group chosen from: a linear or branched C a linear or branched C an acetylamino group; a linear or branched C an aryl group, an aromatic or non-aromatic heterocycle, these cyclic groups being unsubstituted or substituted with the substituents mentioned above, or mesomeric forms thereof.