Impact enhanced prepregs and formulations
OwnerJames M. Browne, Paul A. Steinerinventors
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Abstract
A prepreg formulation comprising prepreg filament fibers unidirectionally aligned, and/or woven and nonwoven fibrics, a thermosetting matrix resin and thin surface layers of extremely fine fibers of a thermoformable polymer having at least one of a T.sup.m or T.sup.g greater than about 300.degree. C. or no T.sup.m or T.sub.g and a decomposition temperature greater than about 300.degree. C. The preferred matrix resin is a blend of a thermosetting epoxy resin and an amorphous thermoplastic polymer that has a T.sub.g greater than about 195.degree. C. The invention contemplates the addition of small amounts of a Cr(III) complex and inorganic whiskers.
Claims18
A prepreg formulation comprising prepreg fabric and filament fibers unidirectionally aligned, a thermosetting matrix resin of a mixed resin and thin surface layers of extremely fine fibers, fibrids or particles of a thermoformable polymer having at least one of a T.sub.m or T.sub.g greater than about 300.degree. C. or no T.sub.m or T.sub.g and a decomposition temperature greater than about 300.degree. C.
Dependencies are inferred from the claim text.