UV-light stabilized compositions containing substituted 2-keto-1,4-diazacycloalkanes
申请人:The B.F. GOODRICH Company
公开号:EP0001284A1
公开(公告)日:1979-04-04
Novel polysubstituted 2-keto-1,4- diazacycloalkanes are powerful stabilizers for materials subject to ultraviolet (UV) light degradation, particularly for polyolefins. The cyclic 2-keto compounds of this invention have (a) a fixed two-carbon bridge between the N'and N4 atoms of the diaza ring, the remaining portion of the ring having a variable length bridge of two or more carbon atoms, (b) an N-adjacent carbonyl in the fixed two-carbon bridge, and (c) at least one N4-adjacent carbon atom of the diaza ring is polysubstituted, that is, has two substituents which may be cyclizable.
Compositions containing (a) the polysubstituted 2- keto-1,4- diazacycloalkanes of this invention, and (b) prior art polysubstituted 2-keto-1,4- diazacycloalkanes, exhibit excellent stability to UV light.
新型多取代 2-酮基-1,4-重氮环烷是紫外线(UV)降解材料的强力稳定剂,尤其适用于聚烯烃。本发明的环状 2-Keto 化合物具有:(a)重氮环的 N'原子和 N4 原子间有一个固定的双碳桥,环的其余部分有一个由两个或两个以上碳原子组成的长度可变的桥;(b)在固定的双碳桥中有一个 N 相邻的羰基;(c)重氮环中至少有一个 N4 相邻的碳原子是多取代的,即有两个可环化的取代基。
含有(a)本发明的多取代 2-酮基-1,4-二氮杂环烷烃和(b)现有技术中的多取代 2-酮基-1,4-二氮杂环烷烃的组合物对紫外线具有极佳的稳定性。