The present invention relates to a process for protecting keratinous material by treating it with an ester of the formula ##STR1## wherein R is the radical of an acid of the formula ##STR2## in which X is a C.sub.1 -C.sub.4 alkyl group or halogen or one of the two substituents X is a phenyl group, or R is the radical of 4-chlorophenylisopropylacetic acid, to compositions containing one or more of these esters, and to novel esters of the formula ##STR3## wherein R is the radical of an acid of the formula ##STR4## or of 4-chlorophenylisopropylacetic acid.
                            本发明涉及一种通过用公式##STR1##中的酯处理角蛋白质材料以保护其的方法,其中R是公式##STR2##中酸的基团,其中X是C.sub.1-C.sub.4烷基或卤素或两个取代基中的一个是苯基,或者R是4-
氯苯基异丙
醋酸的基团,以及含有这些酯中的一种或多种的组合物,以及公式##STR3##中的新型酯,其中R是公式##STR4##中的酸的基团或4-
氯苯基异丙
醋酸的基团。