EPOXY RESIN COMPOSITION FOR FIBER-REINFORCED COMPOSITE MATERIAL, PREPREG AND FIBER-REINFORCED COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an epoxy resin composition capable of giving the cured product having excellent plastic deformability enabling it to use as a matrix resin for a fiber-reinforced composite material, a prepreg using the same and to provide the fiber-reinforced composite material and a tubular body having various excellent physical properties and capable of being obtained from the prepreg. SOLUTION: The epoxy resin composition contains components (A) an epoxy resin having an average epoxy equivalent of 250-350 and (B) a curing agent, and the glass transition temperature Tg( deg.C) of its cured product obtained by heat curing and the elastic modulus G'r (MPa) in the rubbery state of the cured product satisfy formulae (1): 80 deg.C<=Tg<=200 deg.C and (2): 1<=G'r<=8, respectively.