| 摘要 |
The epoxy resin composition is an epoxy resin composition containing epoxy resin [A1], epoxy resin [B1], epoxy resin [C1] and curing agent [D], wherein [A1] is a bisphenol epoxy resin with softening point of 90°C or more, [B1] is a tri-functional or higher amine epoxy resin, and [C1] is a bisphenol F epoxy resin with number average molecular weight of 450 or less, and the epoxy resins [A1]-[C1] satisfy the blending ratio of 20-50 parts by mass of [A1], 30-50 parts by mass of [B1] and 10-40 parts by mass of [C1] with respect to 100 parts by mass of the total epoxy resin components. The invention provides an epoxy resin composition of low viscosity and excellent impregnation between reinforcing fibers that forms cured resin products having both excellent elastic modulus and toughness, as well as a prepreg and a fiber-reinforced compound material that use the epoxy resin composition.
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