Damage tolerant composites containing infusible particles

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

1988-12-20

1991-06-18

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525109, 525113, 525119, 525122, 523400, C08L 6300

Patent

active

050250450

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 that reside primarily between plies 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. Alternatively, the infusible particles may be disposed directly on the epoxy resin surface of the prepreg.

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"Development of Resins for Damage Tolerant Composites--A Systematic Approach", by Joram Diamant and Richard J. Moultan, 29th National SAMPE Symposium, Apr. 3-5, 1984.

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