Patent ID: 8328879

Claim:
An agent for lightening keratinic fibers comprising, in a cosmetic carrier: (i) at least one oxidizing agent chosen from hydrogen peroxide and/or one of the solid addition products thereof onto organic or inorganic compounds, and (ii) at least one cationic phthalimide according to formula (I), wherein R1 and R2 are each mutually independently a hydrogen atom, a halogen atom, 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 1 -C 6 hydroxyalkyl group, a C 2 -C 6 polyhydroxyalkyl group, a hydroxyl group, a C 1 -C 6 alkoxy group, a nitrile group, a nitroso group, a nitro group, a carboxylic acid group, a sulfonic acid group, a sulfonamido group, an amino group, a di-C 1 -C 6 -alkylamino group, a mono-C 1 -C 6 -alkylamino group, a C 1 -C 6 alkoxycarbonyl group, an optionally substituted aryl group, or an optionally substituted heteroaryl group, or R1 and R2 form, together with the adjacent benzene ring, a further phthalimide unit according to formula (Ia), R3, R4, R5 are each mutually independently 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 2 -C 6 polyhydroxyalkyl group, a C 1 -C 6 -alkoxy-C 2 -C 6 -alkyl group, a cyano-C 1 -C 6 -alkyl group, an aryl-C 1 -C 6 -alkyl group, a carboxy-C 1 -C 6 -alkyl group or a sulfonyl-C 1 -C 6 -alkyl group, or two of the substituents R3, R4 and R5 form, together with the attached nitrogen, a 5-, 6- or 7-membered, saturated or unsaturated ring which optionally contains further heteroatoms, n is an integer from 1 to 6, and A − is a physiologically acceptable anion.