申请人:Sankyo Company, Limited
公开号:US04131599A1
公开(公告)日:1978-12-26
Sterically hindered piperidines having at least 5 alkyl groups in ring positions 2,3,5 and 6 are usable as light-stabilizers for organic polymers. The nitrogen may be unsubstituted or may bear a mono- to tetravalent substituent. The compounds can be synthesized by a Wolf-Kishner reduction of polyalkyl 4-oxopiperidines optionally followed by a N-substitution reaction in a second step. The stabilizers are added to the polymers in an amount of from 0.01 to 5% by weight. Preferred is the stabilization of polyolefins, styrene polymers, polyamides and polyurethanes.
具有至少5个烷基基团的立体障碍哌啶在环的2、3、5和6位置可用作有机聚合物的光稳定剂。氮原子可以是未取代的或带有单价到四价的取代基。这些化合物可以通过多烷基4-氧代哌啶的Wolf-Kishner还原反应,随后在第二步进行N-取代反应来合成。稳定剂以0.01至5%的重量添加到聚合物中。首选聚烯烃,苯乙烯聚合物,聚酰胺和聚氨酯的稳定化。