| 摘要 |
PURPOSE:To obtain a resin composition for carbon fiber composite materials, excellent in heat resistance, toughness, etc., by mixing an epoxy resin based on a hydantoin epoxy resin with 4,4'-diaminodiphenyl sulfone and a specified rubber component. CONSTITUTION:The purpose resin composition for carbon fiber composite materials is prepared by using an epoxy resin (A) containing at least 50wt% hydantoin epoxy resin with 4,4'-diaminodiphenyl sulfone (B) and a carboxyl group-terminated liquid butadiene/acrylonitrile rubber and/or a reaction product thereof (C) with an epoxy compound as principal components. Prepregs are formed by impregnating carbon fiber with the obtained resin composition and the prepregs are press-molded to obtain a carbon fiber composite useful as a structural material for aircraft.
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