申请人:THE DOW CHEMICAL COMPANY
公开号:EP0239784A2
公开(公告)日:1987-10-07
An improvement in curable compositions which comprise a polyglycidyl ether such as the triglycidylether of tris(hydroxyphenyl)methane and a halogenated dihydric phenol such as tetrabromobisphenol A, the improvement being employing as the halogenated dihydric phenol one in which the halogen atoms are meta with respect to the hydroxyl groups such as 2,2ʹ,6,6ʹ-tetrabromo-3,3ʹ,5,5ʹ-tetramethyl-4,4ʹ-biphenol. These compositions can be cured by heating in the presence or absence of a catalyst for reacting epoxy groups with phenolic hydroxyl groups such as 2-methyl imidazole. These compositions are particularly useful in the preparation of electrical laminates.
一种可固化组合物的改进,该组合物包括聚缩水甘油醚,如三(羟基苯基)甲烷的三缩水甘油醚和卤代二水合酚,如四溴双酚 A,该改进是采用卤代二水合酚,其中卤原子相对于羟基是元的,如 2,2ʹ,6,6ʹ-四溴-3,3ʹ,5,5ʹ-四甲基-4,4ʹ-联苯酚。 这些组合物可以在有或没有催化剂的情况下加热固化,催化剂用于环氧基团与酚羟基,如 2-甲基咪唑反应。 这些组合物在制备电气层压板时特别有用。