Patent ID: 7261743
Filing Date: 2007-08-28
Classification: A61K,A61Q

Abstract:
1. A process for dyeing human keratin fibers, comprising applying to the keratin fibers a cosmetic dye composition comprising at least one cationic direct dye compound chosen from those of formulae (I), (II) and (III): wherein: A and A Z is chosen from aliphatic and aromatic radicals, Z R X is a bridging radical chosen from —CO—; —CO—CH wherein: Y and Y Z R R An X′ and Y′, which may be identical or different, are chosen from hydrogen atoms, halogen atoms, and (C R′ R′ wherein: B is chosen from linear and branched alkylene radicals, R′ R′ R′ R′ W is a radical of formula (e): wherein: K is a coupling radical, Z is a bridging radical chosen from the radicals of formulae: wherein R′ B and wherein in formula (III), the number of cationic charges is two.