USE OF BENZOPHENONE UV FILTERS FOR PREVENTING TANNING

摘要

Described is the use of organic UV filters of formula (1), wherein R1 and R2, independently from each other are hydrogen, C1- C20alkyl, C2 -C10alkenyl, C3-C10cycloalkyl, C3-C10cycloalkenyl, or R1 and R2 together with the nitrogen atom to which they are bonded can form a 5- or 6-membered ring; R3 and R4, independently from each other are C1-C20alkyl, C2-C10alkenyl, C3-C10-cycloalkyl, C3-C10cycloalkenyl, C1-C12alkoxy, C1-C20alkoxycarbonyl, C1-C12alkylamino, C1- C12dialkylamino, aryl, heteroaryl, optionally substituted, substituents which confer solubility in water, chosen from the group consisting of a nitrile group, carboxylate, sulfonate or ammonium radicals; X is hydrogen, COOR5, CONR6R7; R5, R6 and R7, independently from each other are hydrogen, C1-C20alkyl, (C)2-C10alkenyl, C3-C10cycloalkyl, C3-C10 cycloalkenyl, (Y-O)o-Z-aryl; Y is -(CH2)2-, - (CH2)3, -(CH2)4-, -CH(CH3)- CH2-; Z is -CH2-CH3, -CH2-CH2 -CH3, -CH2-CH2-CH2-CH3, - CH(CH3)-CH3; m is from 0 to 3; n is from 0 to 4; o is from 1 to 20; for preventing tanning human skin, and their use in cosmetic and pharmaceutical formulations. ® KIPO & WIPO 2007