Polybenzoxazole-filled nitrile butadiene rubber compositions
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United States of America Patent
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Apr 15, 2008
Grant Date -
Nov 1, 2007
app pub date -
Aug 18, 2005
filing date -
Aug 18, 2005
priority date (Note) -
Expired
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Abstract
An insulation composition that comprises at least one nitrile butadiene rubber ('NBR') having an acrylonitrile content that ranges from approximately 26% by weight to approximately 35% by weight and polybenzoxazole ('PBO') fibers. The NBR may be a copolymer of acrylonitrile and butadiene and may be present in the insulation composition in a range of from approximately 45% by weight to approximately 56% by weight of a total weight of the insulation composition. The PBO fibers may be present in a range of from approximately 3% by weight to approximately 10% by weight of a total weight of the insulation composition. A rocket motor including the insulation composition and a method of insulating a rocket motor are also disclosed.
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