abstract |
(57) [Summary] [Object] To provide a resin composition for prepreg excellent in heat resistance and toughness, and to provide a composite material excellent in mechanical strength in addition to these properties. [Constitution] (A) Epoxy resin, (B) Curing agent, (C) A resin composition for a prepreg, which contains lactams, (D) anionic polymerization catalyst and (E) cocatalyst as essential components. |