| 摘要 |
PURPOSE:To obtain the an epoxy resin composition which can give a cured product excellent in toughness by mixing an epoxy resin with a curing agent, a specified aromatic thermoplastic resin and a thermoplastic resin having a functional group reactive with epoxy, being soluble in the epoxy resin and having a specified numberaverage molecular weight. CONSTITUTION:An epoxy resin (A) (e.g. bisphenol A derived epoxy resin) is mixed with an aromatic thermoplastic resin (e.g. polyetherimide) having an average molecular weight of 10000 or above, and a glass transition temperature of 150 deg.C or above and being soluble in component A and a thermoplastic resin (D) (e.g. siloxane polyimide) having a number-average molecular weight of 2000-20000 and being soluble in component A, and further mixed with a curing agent (B) (e.g. dicyandiamide), and the obtained mixture is melt-kneaded to obtain the objective composition containing 4-25wt.% component C and 0.5-10wt.% component D. A release paper coated with a melt of this composition is laminated with a reinforcing fiber (e.g. carbon fiber) to form a prepreg, and this prepreg is heated to form the objective fiber-reinforced plastic. |
