Patent ID: 7189266
Filing Date: 2007-03-13
Classification: A61K,A61Q

Abstract:
1. A dye composition for human keratin fibers, comprising, in a medium that is suitable for dyeing, at least one direct dye, and at least one dicationic compound chosen from those of formulae (I), (II) and (III): wherein: A and A1, which may be identical or different, are chosen from radicals of formula (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 An X′ and Y′, which may be identical or different, are chosen from hydrogen and 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: and —CO—NR′ 9 —B 1 —NR′ 9 —CO—, and wherein R′ B and wherein, in formula (III), the number of cationic charges is two.