Damage tolerant composites containing infusible particles

Details Damage tolerant composites containing infusible particles Damage tolerant composites containing infusible particles

1987-03-30

1988-11-08

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525113, 525119, 525122, C08L 6300

Patent

active

047835060

ABSTRACT:
Damage tolerant composites comprising high strength filaments in the form of bundles or tows of continuous fiber and a tough phase separated, crosslinked epoxy resin matrix are disclosed. The crosslinked epoxy resin matrix comprises infusible particles made from a rubber polymer that reside primarily between piles of the composite and critically have a median particle size between 10-75 microns. Prepregs for making the damage tolerant composites and methods of making such prepregs and the epoxy resin compositions thereof are also disclosed. The epoxy resin compositions comprise the infusible particles which become segregated as to size on a surface layer of the prepreg during the process of combining the high strength filaments of the prepreg and the resin containing the epoxy resin composition.

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