Patent ID: 7056346

Claim:
A composition comprising, in a cosmetically acceptable support suitable for dyeing the hair, at least one direct dye and at least one crosslinked polymer containing acrylic residue units of the structure in which R 1 denotes H, CH 3 or C 2 H 5 , and C 10 –C 30 alkyl acrylate residue units, wherein said composition is a direct dyeing composition for the hair, wherein said at least one direct dye is an acid azo dye of formulae (I) or (I′): in which Z denotes (I′)a or (I′)b: in which: n denotes zero or 1, p denotes zero, 1 or 2, M denotes H or an alkali or alkaline-earth counterion, an organic amine which may be hydroxylated or not hydroxylated, or ammonia, R 1 denotes H, a C 1 –C 4 alkyl radical or an cycloalkylaryl radical, R 2 denotes H, an —NH 2 radical, an —HN—CO—CH 3 radical or an —NHSO 2 -phenyl radical, R 3 denotes H, or a —N═N-(para-nitrophenyl) radical, R 4 denotes a H, a C 1 –C 4 alkyl radical, a C 1 –C 4 alkoxyl radical, or forms a naphtalenyl ring with the adjacent carbon atom which is unsubstitued of the phenyl group, R 5 denotes H, a C 1 –C 4 alkyl radical, an —SO 3 Na radical, a —NH 2 radical, an —HN—CO—CH 3 radical or an —NO 2 radical, and in which at least one —SO 3 M group is present in formulae (I), (I′)a and (I′)b with the proviso that at least one direct dye is not a dye of chemical formula: