Aramid polymer and powder filler reinforced elastomeric composition for use as a rocket motor insulation
AssigneeThiokol Corporation
InventorsKenneth E. Junior, James D. Byrd
Life of this patent
Estimating the term…
Abstract
An elastomeric composition suitable for use as a rocket motor case insulation is disclosed. The composition consists of a vulcanizable elastomeric composition and reinforcing aramid polymer fibers in combination with a powder filler. A preferred embodiment utilizes polyisoprene as the elastomer, KELVAR.RTM. fibers as the aramid polymer fibers, and silica as the powder filler.
Claims19
A process for insulating a solid propellant rocket motor, comprising the step of employing an essentially asbestos-free elastomeric composition as an insulating liner, said composition comprising:
- A. from 1 to 40 percent by weight of aramid polymer fibers,
- B. from 1 to 75 percent by weight of a powder filler selected from the group consisting of silica, iron oxide, titanium oxide, carbon, milled glass, and ceramic clays, and
- C. A vulcanizable elastomeric composition including:
- (i) a vulcanizable elastomer, and
- (ii) vulcanizing agents for said elastomer.
A process for insulating a solid propellant rocket motor, comprising the step of employing an essentially asbestos-free elastomeric composition as an insulating liner, said composition consisting essentially of:
- A. from 1 to 40 percent by weight of aramid polymer fibers;
- B. from 1 to 75 percent by weight of powder filler selected from the group consisting of silica, iron oxide, titanium oxide, carbon, milled glass, and ceramic clays;
- and
- C. A vulcanizable elastomeric composition including
- (i) a vulcanizable elastomer, and
- (ii) vulcanizing agents for said elastomer.
Dependencies are inferred from the claim text.