A high degree of resistance to moisture and solder and high flame retardancy are realized without incorporating a halogen in view of environmental friendliness. A phenolic resin has structural moieties which are a naphthylmethyloxy group- or anthrylmethyloxy group-containing aromatic hydrocarbon group (ph1), a phenolic hydroxyl group-containing aromatic hydrocarbon group (ph2), and a divalent aralkyl group (X) represented by general formula (1) below:
(where Ar represents a phenylene group or a biphenylene group and Rs each independently represent a hydrogen atom or a methyl group) and has a structure in which plural aromatic hydrocarbon groups selected from the group consisting of the naphthylmethyloxy group- or anthrylmethyloxy group-containing aromatic hydrocarbon group (ph1) and the phenolic hydroxyl group-containing aromatic hydrocarbon group (ph2) are bonded through the divalent aralkyl group (X). This phenolic resin is used as a curing agent for an epoxy resin.
考虑到环境友好性,在不加入卤素的情况下,实现了高防潮性、高耐焊性和高阻燃性。
酚醛
树脂的结构分子是由以下通式(1)表示的含
萘甲氧基或
蒽甲氧基的
芳香烃基(ph1)、含
酚羟基的
芳香烃基(ph2)和二价芳烷基(X):
(其中 Ar 代表亚苯基或
联苯基,Rs 各自独立地代表氢原子或甲基),其结构是多个
芳香烃基团通过二价芳烷基(X)结合在一起,这些
芳香烃基团选自含
萘甲氧基或
蒽甲氧基的
芳香烃基团(ph1)和含
酚羟基的
芳香烃基团(ph2)组成的组。这种
酚醛
树脂可用作环氧
树脂的固化剂。