Patent ID: 7326255
Filing Date: 2008-02-05
Classification: A61K,A61Q

Abstract:
1. A process for dyeing human keratin fibers, comprising applying to the keratin fibers a composition comprising at least one latent pigment, wherein said at least one latent pigment is soluble in a medium that is suitable for dyeing, and then chemically, thermally or photochemically converting the latent pigment in the keratin fibres into a water-insoluble pigment wherein the at least one latent pigment is chosen from those of formula (I): wherein: x is an integer ranging from 1 to 8, A is the chromophoric radical of dyes comprising a hetero atom chosen from N, O and S, wherein wherein Z is chosen from cationic water-solubilizing groups Z Y is a hetero atom chosen from N, O and S, F and F′ which can be identical or different, are chosen from linear and branched C n, m and m′, which may be identical or different are chosen from zero and 1, and B is linked to a hetero atom of the chromophore A.