申请人:Riedel-de Haen Aktiengesellschaft
公开号:US04824892A1
公开(公告)日:1989-04-25
Benzophenone derivatives having at least one hydroxyl group in the ortho-position relative to the carbonyl group are used for stabilizing numerous substrates against the action of UV light. 1,3-bis-(4-Benzoyl-3-hydroxyphenoxy)-2-propanol is a photo-absorber containing two benzophenone groups. Particularly suitable stabilizers are esters of this substituted propanol with unsaturated carboxylic acids, for example esters of acrylic acid and methacrylic acid. These compounds are prepared by esterifying the substituted propanol with an unsaturated acid or by esterifying the substituted propanol with a saturated acid containing a reactive methylene group and subjecting the product to subsequent condensation with a keto compound. They can be polymerized and are suitable for the preparation of homopolymers and copolymers.
苯甲酮衍生物中,若羰基基团的邻位位置上至少有一个羟基,可用于稳定多种基质以抵御紫外线的作用。1,3-双-(4-苯甲酰-3-羟基苯氧基)-2-丙醇是一种含有两个苯甲酮基团的光吸收剂。特别适合的稳定剂是这种取代丙醇与不饱和羧酸的酯,例如丙烯酸和甲基丙烯酸的酯。这些化合物通过酯化取代丙醇与不饱和酸,或通过酯化取代丙醇与含有反应性亚甲基基团的饱和酸,并将产物随后与酮类化合物进行缩合制备而成。它们可聚合并适用于制备同聚物和共聚物。