C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 63/00 (2006.01) B32B 27/38 (2006.01) C08L 79/08 (2006.01)
Patent
CA 2049116
The subject invention relates to a toughened epoxy matrix formulation comprising at least two epoxy components, an amine hardener and about 10%-25% of a micropulverized polyimide thermoplastic having a molecular weight of from about 20,000 to about 100,000 and Tg of at least about 220°C. The invention further relates to a process for preparing a toughened epoxy matrix formulation comprising: a. preheating a blend of at least two epoxy compounds to a temperature of about 130°F to about 140°F; b, blending into the epoxy blend from step (a) a micropulverized polyimide thermoplastic; c. mixing the blend of epoxy and thermoplastic at a temperature of about 110°F to about 130°F; and d. adding to the blend of epoxy and thermoplastic an amine hardener and mixing at about 110°F to about 130°F until a low mix viscosity is obtained. The invention also relates to a prepreg prepared from the above-specified novel epoxy matrix formulation and appropriate reinforcements and a process for producing such prepregs.
Babayan Eduard P.
Nguyen Hoa X.
Cytec Technology Corp.
Gowling Lafleur Henderson Llp
Hitco
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