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Abstract

An epoxy resin composition having excellent adhesive and high mechanical strength is disclosed. The composition comprises: (A) a bisphenol A type epoxy resin present in an amount of at least 45 wt % of the total epoxy resin; (B) a novolak type epoxy resin present in an amount of at least 8 wt % of the total epoxy resin; (C) a glycidyl amine type epoxy resin (including the one used in (D)) present in an amount of at least 15 wt % of the total epoxy resin; (D) a reaction product of a butadiene-acrylonitrile copolymer having carboxyl groups on at least both ends of the molecule and a glycidyl amine type epoxy resin, said butadiene-acrylonitrile copolymer being present in an amount of 1.5 to 15 parts by weight per 100 parts by weight of the total epoxy resin; (E) nitrile rubber present in an amount of 2 to 8 parts by weight per 100 parts by weight of the total epoxy resin; wherein the total epoxy resin is the total amount of epoxy resins (A), (B) and (C), as well as the glycidyl amine type epoxy resin used in preparing component (D); (F) a curing agent consisting of dicyandiamide; (G) a curing accelerator, and (H) a reinforcing fiber to form a composition which exhibits good performance when it is used as a prepreg for composite.

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First Claim