申请人:Ciba-Geigy Corporation
公开号:US04007157A1
公开(公告)日:1977-02-08
Substituted piperazines are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds are prepared by the alkylation reaction between a substituted piperazine dione and an organic halide followed by reduction with lithium aluminum hydride. Polymeric compsitions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is 15,15'-dodecamethylene-bis(7,15-diazadispiro[5,1,5,3]hexadecane).
取代哌嗪是合成聚合材料的稳定剂,通常会因紫外线而受到破坏。这些化合物通过取代哌嗪二酮和有机卤素之间的烷基化反应制备,然后用锂铝氢化物还原。含有这些稳定剂的聚合物组合物还可以含有阻碍酚类化合物。一个典型的实施例是15,15'-十二亚甲基-双(7,15-二氮杂二螺[5,1,5,3]十六烷)。