| 摘要 |
Compounds of formula (I) (I) in which m + n is a number from 1 to 100 and n varies from zero to 90% of the sum of m + n; X is -O- or -NH-; R1 is hydrogen, C1-C18alkyl, C2-C4alkyl substituted in position 2, 3 or 4 by C1-C8alkoxy or by di(C1-C4alkyl)amino; C5-C12cycloalkyl unsubstituted or substituted with 1, 2 or 3 C1-C4alkyls; C7-C9phenylalkyl unsubstituted or substituted on the phenyl with 1, 2 or 3 C1-C4alkyls; or a group of formula (II); (II) R2 is hydrogen, C1-C8alkyl, O, OH, NO, CH2CN, C1-C18alkoxy, C5-C12cycloalkoxy, C7-C9phenylalkyl unsubstituted or substituted on the phenyl with 1, 2 or 3 C1-C4alkyls; or C1-C8acyl; and A is C6-C18alkyl; are useful for stabilizing an organic material against light, heat or oxidation. |
