Process for prolonging the processing window of thermosetting resins
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United States of America Patent
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Jun 10, 2014
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Jun 14, 2012
app pub date -
Sep 14, 2009
filing date -
Sep 14, 2009
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Abstract
The processing window for thermosetting resins that contain particulate hardeners is prolonged using the combined steps of heat-treating the resin to form a low-viscosity resin mixture in which the particles are dissolved and then molding the low-viscosity resin mixture at temperatures below the dissolution temperature of the particles to infuse a fibrous preform. The infused resin preform is heated to the curing temperature of the resin to provide final curing of the resin.
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