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US 4,908,088 AGranted
Extreme damage tolerant graphite composites and method of making same
AssigneeBASF SE
InventorsJack D. Boyd, William T. Mead, Theodore F. Biermann
Life of this patent
Estimating the term…
Abstract
Multilayer prepregs containing an engineering thermoplastic film laminated to a cyanate-functional thermosetting resin-impregnated fiber reinforcement are capable of preparing structural composites with extreme damage tolerance.
Claims14
A process for the manufacture of a multi-layer heat-curable prepreg comprising:
- (a) preparing a thermosetting, cyanate-functional resin-impregnated, fiber reinforced unilayer prepreg;
- (b) laminating to said unilayer prepreg one or more films of an engineering thermoplastic by means of heat and pressure such that said thermoplastic becomes fused to said unilayer prepreg producing an integral multi-layer structure, wherein said thermoplastic film is a 0.5 mil to 0.7 mil film of an engineering thermoplastic.
A multi-layer heat-curable prepreg comprising:
- (a) a layer of fiber reinforcement impregnated with a thermosetting resin containing a cyanate-functional resin, and
- (b) a 0.05 to 0.7 mil layer of an engineering thermoplastic film,
- wherein said thermoplastic layer and said fiber reinforcement layer are fused together under heat and pressure to form an integral heat-curable multilayer structure.
Dependencies are inferred from the claim text.