UV-light-stabilized compositions containing substituted 1,5-diazacycloalkanes and 2-keto-1,5-diazacycloalkanes, novel compounds and synthesis thereof
申请人:The B.F. GOODRICH Company
公开号:EP0001560A2
公开(公告)日:1979-05-02
Novel polysubstituted 1,5-diazacycloalkanes and polysubstituted 2-keto-1,5- diazcycloalkanes are powerful stabilizers for materials subject to ultraviolet (UV) light degradation, particularly for polyolefins. The cyclic compounds of this invention have (a) a fixed three-carbon bridge between the N' and N5 atoms of the diaza ring, the remaining portion of the ring having a variable length bridge of two or more carbon stoms, (b) an N-adjacent carbon atom of the diaza ring is polysubstituted, that is, has two substituents which may be cyclizable.
Compositions containing (a) the polysubstituted 1,5-diazacycloalkanes and polysubstituted 2-keto-1,5- diazacycloalkanes of this invention, and (b) prior art polysubstituted 1,5-diazacycloalkanes and polysubstituted 2-keto-1,5-diazscycloalkanes, exhibit excellent stability to UV light.
A novel synthesis for preparing polysubstituted 2- keto-1,5- diazacycloalkanes is disclosed.
新颖的多取代 1,5-二氮环烷和多取代 2-酮基-1,5-二氮环烷是紫外线(UV)降解材料的强力稳定剂,尤其适用于聚烯烃。本发明的环状化合物(a)在重氮环的 N'和 N5 原子间有一个固定的三碳桥,环的其余部分有一个由两个或多个碳原子组成的长度可变的桥,(b)重氮环的一个 N 相邻碳原子是多取代的,即有两个可环化的取代基。
含有 (a) 本发明的多取代 1,5-二氮杂环烷烃和多取代 2-酮基-1,5-二氮杂环烷烃,以及 (b) 现有技术中的多取代 1,5-二氮杂环烷烃和多取代 2-酮基-1,5-二氮杂环烷烃的组合物,对紫外线具有极佳的稳定性。
本发明公开了一种制备多取代 2-酮基-1,5-重氮环烷的新型合成方法。