Epoxy resin composition, cured product thereof, fiber-reinforced composite material, and high pressure gas container

Abstract

Provided is an epoxy resin composition containing an epoxy resin (A) and an epoxy resin curing agent (B), wherein the epoxy resin (A) contains from 10 to 65 mass % of an epoxy resin (A1) and from 35 to 90 mass % of an epoxy resin (A2), the epoxy resin (A1) having a glycidyloxy group derived from resorcinol, and the epoxy resin (A2) being other than the epoxy resin (A1) and containing an aromatic ring; the epoxy resin (A2) contains 70 mass % or more of an epoxy resin having a glycidyloxy group derived from bisphenol F; and a cured product of the epoxy resin composition has a hydrogen gas permeability coefficient of 6.4×10−11 or less [cc·cm/(cm2·s·cmHg)]. Also provided are a cured product of the epoxy resin composition, a fiber-reinforced composite material, and a high-pressure gas container containing the fiber-reinforced composite material.

Dependencies are inferred from the claim text.