Patent ID: 7166136

Claim:
A hair dye composition comprising a component (A), which is a long-chain acyl sulfonic acid salt anionic surfactant represented by the following formula (I): R 1 CO-a-(CH 2 ) n SO 3 M 1 (I), wherein R 1 CO— represents a saturated or unsaturated fatty acid residue (acyl group) having an average carbon atom number of 10 to 22; a represents —O— or —NR—, wherein R represents a hydrogen atom or a C1–C3 alkyl group; M 1 represents a hydrogen atom, an alkali metal, an alkaline earth metal, an ammonium, or an organic amine; and n represents an integer of 1 to 3, in an amount of 0.1 to 10.0 wt. %; a component (B), which is an aliphatic alcohol, in an amount of 0.25 to 25.0 wt. %; a component (C), which is an acid dye and/or a natural dyestuff, and a component (D), which is an emulsion of non-volatile silicone.