Patent ID: 7108726
Filing Date: 2006-09-19
Classification: A61K,A61Q

Abstract:
1. A direct dye composition for keratin fibers, comprising, in a medium suitable for dyeing, at least one direct dye and at least one cationic associative polyurethane of formula (Ia): wherein: R and R′, which may be identical or different, are chosen from hydrophobic groups and hydrogen; X and X′, which may be identical or different, are chosen from groups L″ and groups comprising at least one amine functional group optionally bearing at least one hydrophobic group; L, L′, and L″, which may be identical or different, are chosen from groups derived from diisocyanates; P and P′, which may be identical or different, are chosen from groups comprising at least one amine functional group optionally bearing at least one hydrophobic group; Y is chosen from hydrophilic groups; r is an integer ranging from 1 to 100; and n, m, and p, which may be identical or different, range from 0 to 1000; provided that the at least one cationic associative polyurethane comprises at least one amine functional group chosen from protonated and quaternized amine functional groups, and at least one hydrophobic group.