Toughened prepregs and formulations

Details Toughened prepregs and formulations Toughened prepregs and formulations

1987-12-15

1991-03-26

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428246, 428284, 428297, 428298, 428294, 428413, 523456, B32B 516

Patent

active

050028219

ABSTRACT:
A prepreg formulation comprising prepreg fabric or filament fibers unidirectionally aligned and a toughened resin system comprising a thermosetting matrix resin and a small amount of a chromium (III) complex. In another embodiment, the invention includes the presence of thin surface layers of extremely fine fibers 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. In another embodiment, the invention includes the presence of inorganic fine fibers. The preferred matrix resin is a blend of a thermosetting epoxy resin and an amorphous thermoplastic polymer having a T.sub.g greater than about 195.degree. C.

REFERENCES:
patent: 4510277 (1985-04-01), St. Clair et al.
patent: 4656207 (1987-04-01), Jabloner et al.
patent: 4656208 (1987-04-01), Chu et al.

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