Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Reexamination Certificate
2008-01-24
2011-10-11
Ortiz, Angela (Department: 1786)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
C428S295100
Reexamination Certificate
active
08034442
ABSTRACT:
The present invention provides a prepreg made by impregnating a resin composition into a fiber reinforcing material, the resin composition comprising 50 to 60 parts by weight of an aromatic bismaleimide (A), 30 to 40 parts by weight of an alkenylphenol ether compound (B) expressed by a specific general formula, 5 to 15 parts by weight of an alkenyl aromatic comonomer (C), and 1 to 10% by weight of a thermoplastic resin (D) soluble in (B) or (C) based on the total amount of (A), (B) and (C), the aromatic bismaleimide (A) including 90% by weight or more of bismaleimide diphenylmethane, and a composite material having a glass transition temperature of 260 to 350° C. obtained by heat-curing the prepreg. The invention also provides a prepreg for obtaining a fiber-reinforced composite material excellent in solvent resistance, thermal oxidation resistance and the like while maintaining thermal resistance inherent in an aromatic bismaleimide resin used as a matrix resin and a fiber-reinforced composite material obtained from the prepreg.
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Kaneko Toru
Sanai Shusuke
Ortiz Angela
Sughrue & Mion, PLLC
Thompson Camie
Toho Tenax Co., Ltd.
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