Polybenzimidazole polymer and powder filler reinforced elastomer

Details Polybenzimidazole polymer and powder filler reinforced elastomer Polybenzimidazole polymer and powder filler reinforced elastomer

1983-12-16

1986-07-15

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523179, 524502, C08K 336, C08K 322

Patent

active

046007326

ABSTRACT:
An elastomeric composition suitable for use as a rocket motor case insulation is disclosed. The composition comprises a vulcanizable elastomeric material and reinforcing polybenzimidazole polymer fibers in combination with a powder filler. A preferred embodiment utilizes polyisoprene as the elastomer and silica as the powder filler. These compositions have better erosion resistance than asbestos-reinforced compositions, and do not pose the environmental or safety risks associated with asbestos-reinforced insulation.

REFERENCES:
patent: 3954701 (1976-05-01), Schaffling
patent: 4126741 (1978-11-01), Carleton et al.
patent: 4126742 (1978-11-01), Carleton et al.
patent: 4316969 (1982-02-01), Koyama et al.

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