The present invention relates to novel piperidine compounds of the formula (I)
in which R₁ and R₃ which are identical or different are hydrogen, C₁-C₈alkyl, O, OH, NO, CH₂CN, C₁-C₁₈alkoxy, C₅-C₁₂cycloalkoxy, C₃-C₆alkenyl, C₇-C₉phenylalkyl which is unsubstituted or mono-, di- or tri-substituted on the phenyl by C₁-C₄alkyl; or C₁-C₈acyl and R₂ is e.g. C₁-C₁₂alkylene.
These compounds are effective stabilisers for organic materials, in particular synthetic polymers, against the actions of light, heat and oxidation.
本发明涉及式 (I) 的新型
哌啶化合物
C₃-C₆烯基、C₇-C₉未被取代或在苯基上被 C₁-C₄烷基单取代、二取代或三取代的苯基烷基;或 C₁-C₈酰基,且 R₂ 如下g. C₁-C₁₂ 烷基。
这些化合物是有机材料,特别是合成聚合物的有效稳定剂,可防止光、热和氧化作用。