Patent ID: 7419511

Claim:
A composition comprising, in a cosmetically acceptable medium, at least one direct dye of formula (I) or (I′): wherein: A 1 and A′ 1 , which may be identical or different, are each chosen from oxygen, sulfur, and nitrogen substituted with a linear or branched C 1 -C 6 alkyl radical, optionally substituted with one or more groups chosen from halo, hydroxyl; selenium, and CR′ 2 ; R 1 , R 6 and R′ 6 , which may be identical or different, are each chosen from hydrogen; a linear, branched or cycloalkyl C 1 -C 22 radical, optionally substituted with at least one hydroxyl group, at least one linear or branched C 1 -C 6 alkoxy group, at least one C 1 -C 6 cycloalkoxy group, or at least one C 6 -C 30 aryl or aryloxy group optionally substituted with at least one sulfo group, with at least one carboxyl group or with at least one C 1 -C 6 alkoxycarbonyl group; and a C 6 -C 30 aryl radical; R 2 , R′ 2 , R 3 , R′ 3 , R 4 , R′ 4 , R 5 and R′ 5 , which may be identical or different, are each chosen from hydrogen; a linear or branched C 1 -C 22 radical, optionally substituted with at least one hydroxyl, carboxyl, halo or sulfo radical; or R 2 , R′ 2 , R 3 and R′ 3 , may optionally form in pairs together with the carbon atoms to which each is attached, an aliphatic, heterocyclic, aromatic or heteroaromatic ring optionally fused to a second aromatic or heteroaromatic ring; the aliphatic, heterocyclic, aromatic or heteroaromatic ring optionally substituted with at least one linear or branched C 1 -C 4 alkyl radical optionally bearing a carboxyl group, with at least one halogen atom, at least one sulfo radical, at least one carboxyl group, or at least one C 6 -C 30 aryl radical; R 4 , R′ 4 , R 5 and R′ 5 , may optionally form in pairs together with the carbon atoms to which each is attached, an aliphatic, heterocyclic, aromatic or heteroaromatic ring optionally fused to a second aromatic or heteroaromatic ring; the aliphatic, heterocyclic, aromatic or heteroaromatic ring optionally substituted with at least one linear or branched C 1 -C 4 alkyl radical optionally bearing a carboxyl group, with at least one halogen atom, with at least one sulfo radical, with at least one carboxyl group, or with at least one C 6 -C 30 aryl radical; R 2 and R 6 , R 5 and R 6 , R′ 3 and R 6 and/or R′ 5 and R 6 may optionally form a heteroaromatic ring; or in formula (I′), R 2 and R′ 2 , R 3 and R′ 3 , R 2 and R′ 4 and/or R 5 and R′ 5 may form in pairs with the carbon atoms to which each is attached, an aromatic or heteroaromatic ring; n is an integer ranging from 1 to 3; p is an integer equal to 0 or 1; and X − is an organic or mineral anion; wherein the at least one direct dye is not 8H-isoquino[2′,1′:3,4]pyrimido[1,6-a]quinolin-7-ium, 8-phenyl, chloride; and wherein the content of the at least one direct dye ranges from 0.01% to 20% by weight relative to the total weight of the composition.