Epoxy resin prepreg

Abstract

Abstract PURPOSE:To provide a prepreg excellent in adhesion, and without imperfections on the surface of molds, by impregnating a reinforcement with a resin compsn. contg. a specific epoxy resin, a specific reaction product of an epoxy resin, 4,4'- diaminodiphenyl sulfone, and dicyandiamide and curing acclelerator thereof. CONSTITUTION:A reinforcement is impregnated with an epoxy resin compsn. contg. a novolac epoxy resin (A), an epoxy resin with at least one N,N-diglycidylamino group (B), a reaction product (C) of an epoxy resin with a liq. butadiene-acrylonitrile copolymer having carboxyl groups at the both terminals, 4,4'-diaminodiphenyl sulfone (D), and dicyandiamide and curing accelerator thereof (E). The proportion of the dicyandiamide in component (E) is pref. 0.1- 2.0pts.wt. based on 100pts.wt. components (A) and (B), and adhesion of the prepreg lowers greatly at elevated temp. when the proportion is deviated from this range.

Inventors

• 👤 Takeshi Minamizawa
• 👤 南澤　毅
• 👤 Yasuhisa Nagata
• 👤 康久 永田

Bibliographic Details