Patent ID: 7838478

Claim:
A hair detergent composition, which has a pH at 25° C. of 4.5 or less when diluted to 20 times the weight with water, comprising the following components (a), (b), (c) and (d): (a) at least one anionic surfactant in an amount of 0.5 to 60 wt %, wherein the anionic surfactant is represented by the following formula (a1) or (a2): RO(CH 2 CH 2 O) n SO 3 M (a1) R′OSO 3 M (a2) wherein R represents a C 10-18 alkyl or alkenyl group, R′ represents a C 10-18 alkyl group, M represents an alkali metal, alkaline earth metal, ammonium, alkanolamine or basic amino acid, and n stands for a number of from 1 to 5 on weight average, (b) at least one carboxylic acid in an amount of 0.05 to 10 wt %, and selected from the group consisting of lactic acid, maleic acid and malic acid, (c) a silicone derivative in an amount of 0.05 to 4 wt %, which is Bis (C13-C15 Alkoxy) PG Amodimethicone, and (d) at least one organic solvent in an amount from 0.5 to 10 wt % selected from the group consisting of benzyloxyethanol and propylene carbonate, and wherein said composition excludes benzyl alcohol.