Cosmetic composition containing a dibenzoylmethane derivative and a siloxanic benzoate arylalkyl amide derivative; method for photostabilising the dibenzoylmethane derivative

摘要

Cosmetic composition comprises a dibenzoylmethane UV-A filter (I) and an amide-functional polysiloxane (II). Cosmetic composition comprises a dibenzoylmethane UV-A filter (I) and an amide-functional polysiloxane of formula (II). Ar-(CH 2) m-CO-NR 2-B-Si(R) a(O) b(II) Ar : phenyl substituted with 0-2 of 1-4C alkyl; m : 0-4; R 2H, 1-20C alkyl, acetyl or CH 2CH 2NHCOPh; R : 1-20C alkyl, 6-12C aryl, 3,3,3-trifluoropropyl, trimethylsilyloxy or 1-10C alkoxy; a : 1-2; b = (3-a)/2; B : -CH 2-CHW-(Z) v-, -CH=CH-(Z) v- or -C(CH 2)-(Z) v-; Z : (un)saturated 1-6C alkylene optionally substituted with OH or (un)saturated 1-6C alkyl; W : H, OH or (un)saturated 1-8C alkyl; v : 0 or 1.