| 摘要 |
PURPOSE:To obtain a prepreg having excellent adhesivity, etc., by adding a specific reaction product, nitrile rubber and a curing system to 3 kinds of epoxy resins of bisphenol A-type, novolac type and glycidylamine type and impregnating the obtained resin composition to a fibrous material. CONSTITUTION:A fibrous material is impregnated with a composition produced by compounding (A) 45-65wt.% bisphenol A epoxy resin added with 30-70wt.% brominated bisphenol A epoxy resin for imparting flame-retardancy to the base resin, (B) 10-30wt.% novolac epoxy resin, (C) 20-35wt.% glycidylamine epoxy resin, (D) a reaction product of a liquid butadiene-acrylonitrile copolymer having carboxyl groups at both terminals with a glycidylamine epoxy resin, (E) a nitrile rubber and (F) a curing agent consisting of dicyandiamide and a cure accelerator (e.g. a urea compound). The amounts of the components D, E and F are 10-50pts.wt., 3-8pts.wt. and 5-16pts.wt. per 100pts.wt. of the whole epoxy resins (including the component D).
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