Epoxy resin composition for molding fiber reinforced composite material RTM, fiber reinforced composite material and method for producing the same

摘要

Provided is an epoxy resin composition for RTM molding of a fiber-reinforced composite material, including [A] to [D] below, wherein [A]/[B], which is a blend mass ratio of [A] to [B], is in the range of 55/45 to 95/5: [A] a multifunctional epoxy resin that is liquid at normal temperature or has a softening point of 65°C or lower, the multifunctional epoxy resin being at least one selected from phenol novolac epoxy resin, cresol novolac epoxy resin, and triphenylmethane epoxy resin; [B] an alicyclic epoxy resin; [C] an acid anhydride curing agent; and [D] a curing accelerator. Provided is an epoxy resin composition that is excellent in operability in preparation of a resin, is excellent in impregnating ability because a low viscosity is maintained during injection into reinforcing fibers, and cures in a short time at the time of molding, thereby providing a fiber-reinforced composite material that exhibits high heat resistance when cured, and a fiber-reinforced composite material.