申请人:Ciba-Geigy Corporation
公开号:US04191683A1
公开(公告)日:1980-03-04
Derivatives of sterically hindered 4-aminopiperidines are effective as light-stabilizers for organic polymers, especially for polyolefins. The piperidine ring is substituted with at least five alkyl groups, preferably methyl and ethyl groups. The 4-amino group is substituted with mono- or divalent acyl groups. The nitrogen in 1-position may also be substituted with a monovalent organic substituent. The compounds can be synthesized starting from higher homologs of acetone in sequence of several reaction steps.
受空间位阻作用的4-氨基哌啶的衍生物对有机聚合物,特别是聚烯烃,具有良好的光稳定性。哌啶环上至少有五个烷基取代基,最好是甲基和乙基取代基。4-氨基基团被单价或双价酰基取代。1-位置的氮原子也可以被单价有机基团取代。这些化合物可以从丙酮的高级同系物开始,经过几个反应步骤合成。