The present invention relates to novel piperazine-piperidine compounds of the general formula (I)
in which R, is e.g. hydrogen or methyl, R2 is e.g. ethylene, m is zero or 1 and n is e.g. 1, and when n is 1, A is e.g. 2,2-dimethyl-1-propanoyl, n-butoxycarbonyl, n-tetradecyloxycarbonyl or 2,4-bis(N-butyl-(2',2',6',6'-pentamet hyl-4-piperidyl)amino]triazin-6-yl.
The said compounds are effective as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials.
本发明涉及通式(I)的新型
哌嗪-
哌啶化合物。
当 n 为 1 时,A 为 2,2-二甲基-1-丙酰基、正丁氧基羰基、正
十四烷氧基羰基或 2,4-双(N-丁基-(2',2',6',6'-戊甲基-4-
哌啶基)
氨基]三嗪-6-基。
上述化合物可作为有机材料的
光稳定剂、热稳定剂和氧化稳定剂。