Toray Industries, Inc.

Benjamin Lehman

Nobuyuki Arai

Swezin Than Tun

Jonathan C Hughes

Jonathan Hughes

An epoxy resin composition for a fiber-reinforced composite material, containing at least components [A], [B], [C], [D], and [E], wherein the epoxy resin composition when cured has a glass transition temperature greater than 220&#xb0; C. and a storage modulus, as defined by a specific method, less than 35 MPa, as determined from an elastic shear modulus measured at a temperature of at least 35&#xb0; C. higher than the glass transition temperature, wherein the components [A], [B], [C], [D], and [E] are: [A] at least one naphthalene-based epoxy resin having an EEW between 190 and 260 g/mol; [B] at least one epoxy resin having a functionality of three or more; [C] at least one amine curing agent; [D] at least one latent acid catalyst; and [E] at least one cycloaliphatic epoxy resin. This epoxy resin composition is useful in the molding of fiber-reinforced composite materials. More particularly, it is possible to offer an epoxy resin composition for a fiber-reinforced composite material where the cured material obtained by heating has high levels of heat resistance and microcrack resistance.

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Tacoma, WA, United States of America

Benjamin Lehman