Toray Industries, Inc.

Jonathan C Hughes

Nobuyuki Arai

Alfred P Haro

Kenichi Yoshioka

Atsuhito Arai

Norimitsu Natsume

Swezin Than Tun

Benjamin Lehman

Jeffrey A Satterwhite

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.

Epoxy resin compositions and fiber-reinforced composite materials prepared therefrom

Embodiments herein relate to a prepreg comprising a thermosetting resin, and reinforcing fibers in the thermosetting resin, wherein when the prepreg is cured in vacuum bag only conditions, and a method of making the same. The method also applies for autoclave processing. Embodiments also relate to a cured fiber reinforced composite material made by thermally curing the prepreg.

Prepreg, fiber reinforced composite material, and manufacturing method for fiber reinforced composite material

An epoxy resin composition having components (A), (B), (C), and (D), wherein the epoxy resin composition has a viscosity at 40&#xb0; C. of about 1&#xd7;10to about 1&#xd7;10Pa&#xb7;s, a curing start temperature of about 90 to about 110&#xb0; C., and a minimum viscosity at the curing start temperature of about 2 to about 20 Pa&#xb7;s, wherein the components (A), (B), (C), and (D) are as follows: (A) About 60 weight parts or more of a tetraglycidyl amine type epoxy resin per 100 weight parts of the epoxy resin blend; (B) Dicyandiamide; (C) Diaminodiphenyl sulfone and (D) Urea compound.

Epoxy resin composition for fiber reinforced composite material, prepreg, and fiber reinforced composite material

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Auburn, WA, United States of America

Jonathan C Hughes