申请人:L'Oreal
公开号:US05637756A1
公开(公告)日:1997-06-10
A cosmetic or dermatological composition with a depigmenting action comprises derivatives of 2,5-dihydroxyphenylcarboxylic acids, their homologs, and their salts, with the derivatives having the following structural formula: ##STR1## wherein: R.sub.1 represents OR.sub.5, OH, or ##STR2## R.sub.5 is a linear or branched C.sub.1 -C.sub.20 alkyl radical, a linear or branched C.sub.2 -C.sub.20 alkenyl radical, or a C.sub.1 -C.sub.20 alkyl radical substituted by one or more hydroxy or alkoxy groups; r' and r", identical or different, represent a hydrogen atom, a C.sub.1 -C.sub.20 alkyl radical, a C.sub.2 -C.sub.6 hydroxyalkyl radical, or a C.sub.3 -C.sub.6 polyhydroxyalkyl, or r' and r" taken together, with the nitrogen atom, form a heterocycle; the number of carbon atoms in the --(CH.sub.2).sub.n --COR.sub.1 chain is less than or equal to 21; R.sub.2 and R.sub.3, identical or different, represent a hydrogen atom, a linear or branched C.sub.1 -C.sub.4 alkyl radical, or a C.sub.1 -C.sub.4 alkoxy; R.sub.4 represents a hydrogen atom or a linear or branched C.sub.1 -C.sub.4 alkyl radical; and n is an integer from 0 to 20, provided that, when R.sub.2 and R.sub.3 represent a hydrogen atom, n is greater than or equal to 2.
具有脱色作用的化妆品或皮肤科学组合物包括2,5-二羟基苯甲酸衍生物,它们的同系物以及它们的盐,其中衍生物具有以下结构式:##STR1## 其中:R.sub.1代表OR.sub.5,OH或##STR2## R.sub.5是线性或支链C.sub.1-C.sub.20烷基基团,线性或支链C.sub.2-C.sub.20烯基基团或一个C.sub.1-C.sub.20烷基基团,它被一个或多个羟基或烷氧基取代;r'和r",相同或不同,代表氢原子,C.sub.1-C.sub.20烷基基团,C.sub.2-C.sub.6羟基烷基基团或C.sub.3-C.sub.6多羟基烷基,或r'和r"与氮原子一起形成杂环;--(CH.sub.2).sub.n --COR.sub.1链中的碳原子数小于或等于21;R.sub.2和R.sub.3,相同或不同,代表氢原子,线性或支链C.sub.1-C.sub.4烷基基团或C.sub.1-C.sub.4烷氧基;R.sub.4代表氢原子或线性或支链C.sub.1-C.sub.4烷基基团;n是0到20的整数,但当R.sub.2和R.sub.3表示氢原子时,n大于或等于2。