申请人:Sankyo Company Limited
公开号:US04055536A1
公开(公告)日:1977-10-25
New 2,2',6,6'-tetraalkyl-2,2',6,6'-tetramethyl-4,4'-bipiperidylidene derivatives, which are optionally substituted in the 1,1',3,3',5, and 5' positions are useful as stabilizers of organic substrates, particularly synthetic polymers, against photo- and thermal-deterioration. They may be prepared by condensing a corresponding 2,6-dialkyl-2,6-dimethyl-4-piperidone and then optionally introducing the desired substituents at the 1- and 1'-positions in the resulting bipiperidylidene derivative.
新的2,2',6,6'-四烷基-2,2',6,6'-四甲基-4,4'-双哌啶亚烯衍生物,可选地在1,1'、3,3'、5和5'位置上取代,可用作有机基质,特别是合成聚合物的稳定剂,以抵抗光和热恶化。它们可以通过缩合相应的2,6-二烷基-2,6-二甲基-4-哌啶酮,然后在所得的双哌啶亚烯衍生物中可选地引入所需的取代基来制备。