| 摘要 |
PURPOSE:To obtain a prepreg for composite materials excellent in heat resistance, impact resistance and toughness, by impregnating a reinforcement with a resin composition comprising three specified components by a hot melt process. CONSTITUTION:A resin composition (B) is obtained by mixing 30-96wt.% thermosetting resin (a) based on a polyfunctional maleimide such as a polymaleimide compound of formula I (wherein R1 is a bi- to penta-valent aromatic or aliphatic organic group, X1-2 are each H, a halogen or an alkyl, and m is 2-5) and a polyfunctional cyanic ester of formula II (wherein R2 is a polyvalent aromatic organic group and n is 1-10) with 2-50wt.% thermoplastic resin (b) such as polycarbonate, poly(ether) sulfone or polyether imide, preferably, of a particle diameter <=400mu and a glass transition temperature >=100 deg.C and 2-49wt.% epoxy resin such as a glycidyl ester type of a viscosity <=150p (at 25 deg.C) and/or epoxy group-containing reactive diluent. A reinforcement (A) comprising at least one member selected from among carbon, glass and aromatic polyamide fiber is impregnated with component B by a hot melt process.
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