Patent ID: 8034122

Claim:
Agent for lightening keratin fibers comprising, in a cosmetic carrier: (i) at least one cationic 2-acylpyridinium derivative according to formula (I) wherein R is a C 1 -C 4 alkyl group, a C 2 -C 6 hydroxyalkyl group or a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, R1 is a C 1 -C 6 alkyl group, a C 2 -C 6 alkenyl group, a C 2 -C 6 hydroxyalkyl group, a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, a carboxy C 1 -C 6 alkyl group, an aryl C 1 -C 6 alkyl group, a heteroaryl C 1 -C 6 alkyl group, a mono- or di-(C 1 -C 6 alkyl)amino C 2 -C 6 alkyl group, a 3-oxobutyl group, a 2-oxopropyl group, an aryl group or a heteroaryl group, R2 is hydrogen, a halogen, a nitrile group, a nitro group, an amino group, a mono-C 1 -C 6 -alkylamino group, a di-(C 1 -C 6 -alkylamino group, a hydroxyl group, a C 1 -C 6 alkoxy group, a C 1 -C 6 alkyl group, a partially or completely halogenated C 1 -C 6 alkyl group, a C 2 -C 6 alkenyl group, a C 2 -C 6 hydroxyalkyl group, a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, a C 1 -C 6 alkoxycarbonyl group, a carboxyl group, a carbamoyl group or an acyl group R′C(O), in which R′ denotes a C 1 -C 4 alkyl group, a C 2 -C 6 hydroxyalkyl group or a C 1 -C 6 alkoxy C 2 -C 6 alkyl group, X − is a physiologically acceptable anion, (ii) at least one anionic surfactant chosen from alkyl ether sulfates according to formula (II) R″—(OCH 2 CH 2 ) n —OSO 3 M, wherein R″ is a linear or branched, saturated or optionally unsaturated C 8 -C 30 alkyl chain, n is a number greater than 2 and M is hydrogen or a physiologically acceptable cation, and (iii) hydrogen peroxide or a solid addition compound of hydrogen peroxide with inorganic or organic compounds.