Epoxy resin composition and fiber reinforced composite material using epoxy resin composition

摘要

An epoxy resin composition according to the present invention is an epoxy resin composition with a viscosity at 25° C. of no more than 1000 mPa.s, incorporating (A) at least one of a bisphenol type epoxy resin (A1) and a phenol novolak type epoxy resin (A2), a polyvalent epoxy resin formed from a mononuclear aromatic backbone (B) and an aromatic amine curing agent (C), wherein a cured product produced by curing the epoxy resin composition displays a breaking elongation of at least, 5%. The epoxy resin composition has a low viscosity at room temperature which can be sustained with good stability for long periods. Furthermore, a cured product produced by curing the epoxy resin composition displays excellent heat resistance and mechanical characteristics, and is consequently ideally suited for use as a matrix resin for fiber reinforced composite materials.