2-Hydroxy-4-alkoxy-5-aminomethylbenzophenones and their use as photostabilisers in polymeric compositions, a process for preparing a 5,5-methylene bis (2-hydroxy-4-alkoxybenzophenone).
申请人:S.A. Diamond Shamrock Benelux N.V.
公开号:EP0006091A1
公开(公告)日:1980-01-09
2-Hydroxy-4-alkoxy-5-aminomethylbenzophenones of formula:
in which R is an alkyl group having 1 to 12 carbon atoms, and R, and R2 taken together form a 5 to 6 member heterocyclic ring free of carbonyl substituents and including the nitrogen atom, or are independent hydrogen atoms or alkyl groups having 1 to 6 carbon atoms, provided that R, and R2 are not simultaneously hydrogen, are described. They are prepared by reaction of a 2-hydroxy-4-alkoxy-5-amino- methylbenzophenone with an amine and formaldehyde. The compounds can be used, alone or in combination with other stabilisers, to prevent photodegradation of organic materials, particularly as light stabilisers for synthetic resins.
5,5-methylene bis(2-hydroxy-4-alkoxy-benzophenone) of formula:
wherein R ist an alkyl group having 1 to 12 carbon atoms is prepared by condensation of a 2-hydroxy-4-alkoxy-5-aminomethylbenzophenone with itself or with a 2-hydroxy-4-alkoxybenzophenone. This compounds also are useful to prevent photodegradation of organic materials, particulary as stabilisers for synthetic resins.
式中的 2-羟基-4-烷氧基-5-氨基甲基二苯甲酮:
其中 R 是具有 1 至 12 个碳原子的烷基,R 和 R2 共同形成一个不含羰基取代基并包括氮原子的 5 至 6 个成员的杂环,或者是独立的氢原子或具有 1 至 6 个碳原子的烷基,但 R 和 R2 不能同时为氢。它们是通过 2-羟基-4-烷氧基-5-氨基-甲基二苯甲酮与胺和甲醛反应制备的。这些化合物可单独使用,也可与其他稳定剂结合使用,以防止有机材料的光降解,特别是用作合成树脂的光稳定剂。
式中的 5,5-亚甲基双(2-羟基-4-烷氧基二苯甲酮):
其中 Rt 是具有 1 至 12 个碳原子的烷基,由 2-羟基-4-烷氧基-5-氨基甲基二苯甲酮与自身或 2-羟基-4-烷氧基二苯甲酮缩合而成。这种化合物还可用于防止有机材料的光降解,特别是用作合成树脂的稳定剂。