申请人:L'Oreal
公开号:US05175340A1
公开(公告)日:1992-12-29
The invention relates to an unsaturated benzalmalonate derivative of formula: ##STR1## in which: R.sub.1 and R.sub.2 denote a hydrogen atom, a hydroxyl, a trimethylsiloxy, a C.sub.1 -C.sub.6 straight or branched chain alkyl, C.sub.1 -C.sub.6 straight or branched chain alkoxy or a --(CH.sub.2).sub.p --C(R.sub.4).dbd.CH.sub.2 radical, where p is an integer between 1 and 10 and preferably between 1 and 4 and R.sub.4 denotes a hydrogen atom or a C.sub.1 -C.sub.4 straight or branched chain alkyl radical, one of the two radicals R.sub.1 or R.sub.2 denoting a residue --(CH.sub.2).sub.p --C(R.sub.4).dbd.CH.sub.2, R.sub.3 denotes a hydrogen atom, a C.sub.1 -C.sub.6 straight or branched chain alkyl radical or a C.sub.1 -C.sub.6 straight or branched chain alkoxy radical, R.sub.5 and R.sub.6, which are identical or different, denote a C.sub.1 -C.sub.8 straight or branched chain alkyl radical. Use as a sunscreen in cosmetic compositions.
该发明涉及一种公式为:##STR1##的不饱和苯甲基马隆酸酯衍生物,其中:R.sub.1和R.sub.2表示氢原子、羟基、三甲基硅氧基、C.sub.1-C.sub.6直链或支链烷基、C.sub.1-C.sub.6直链或支链烷氧基或--(CH.sub.2).sub.p--C(R.sub.4).dbd.CH.sub.2基团,其中p是介于1和10之间的整数,优选在1和4之间,R.sub.4表示氢原子或C.sub.1-C.sub.4直链或支链烷基基团,R.sub.1或R.sub.2中的一个基团表示残基--(CH.sub.2).sub.p--C(R.sub.4).dbd.CH.sub.2,R.sub.3表示氢原子、C.sub.1-C.sub.6直链或支链烷基基团或C.sub.1-C.sub.6直链或支链烷氧基基团,R.sub.5和R.sub.6,相同或不同,表示C.sub.1-C.sub.8直链或支链烷基基团。用作化妆品组合物中的防晒剂。