| 摘要 |
Compounds of formula (I), in which the polydispersity M w/ M n is for example 1; n is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14; the radicals R 1 are for example C 1 -C 18 alkyl or C 5 -C 12 cycloalkyl; R 2 is for example C 2 -C 12 alkylene; the radicals A and B* are independently of one another - OR 3, -N(R 4)(R 5) or a group of formula (II); R 3, R 4 and R 5, which are identical or different, are for example hydrogen or C 1 -C 18 alkyl, or -N(R 4)(R 5) is additionally a group of formula (III) with Y being -O-, - CH 2 -, -CH 2 CH 2 - or >N-CH 3 ; X is -O- or >N-R 6 ; R 6 is for example hydrogen or C 1 -C 18 alkyl; R is preferably a group of formula (IV); and B has one of the meanings given for A; with the proviso that in the individual recurrent units of formula (I), each of the radicals B, R, R 1 and R 2 has the same or a different meaning. The indicated compounds are useful as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers. |
