Photostabilizers based on sterically hindered amines with mixed functionalization

摘要

A compound of formula (I) ** Formula ** in which one or both radicals of the radicals R1 are independently from each other C1-C20 alkyloxy or C3-C12 cycloalkyloxy and the remaining radicals R1 are independently from each other hydrogen, C1 alkyl -C20 or C3-C12 cycloalkyl; the radicals R0 and R2 are independently from each other hydrogen, C1-C20 alkyl, C3-C12 cycloalkyl or a group of formula (II-a) ** Formula ** where R3 is hydrogen, C1-C20 alkyl, C3-C12 cycloalkyl, alkyloxy C1-C20 or C3-C12 cycloalkyloxy; Y is C2-C12 alkylene; m is 0 or 1; n is 1, 2 or 3; when n is 1, X is hydrogen, C1-C20 alkyl, C3-C12 cycloalkyl or a group of formula (II-a); when n is 2, X is C2-C12 alkylene; when n is 3, X is a group N (Z-) 3 where Z is C2-C12 alkylene.