| 摘要 |
Compounds of the formula (I) <IMAGE> (I) <IMAGE> +TR <IMAGE> wherein n is a number from 1 to 20; the radicals R1 are independently of one another hydrogen, C1-C8alkyl, -O, -OH, -CH2CN, C1-C18alkoxy, C5-C12cycloalkoxy, C3-C6alkenyl, C7-C9phenylalkyl which is unsubstituted or substituted on the phenyl by 1, 2 or 3 C1-C4alkyl; or C1-C8acyl; R2 has one of the meanings given for R1; X is C2-C10alkylene; and Y is -O- or >NH; with the proviso that in the individual recurrent units of the formula (I), each of the radicals R1, R2, X and Y has the same or different definitions; are very effective as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers. |
