D - Textiles – Paper – 01 – F
Patent
D - Textiles, Paper
01
F
18/11
D01F 11/00 (2006.01) D01F 9/12 (2006.01)
Patent
CA 1080921
Abstract of the Disclosure A rapid method for forming carbon structures from flexible poly- urethane resin strands, which faithfully reproduces the geometry of the uncarbonized polyurethane resin strands, by infusing the polyurethane resin strands with a curable furan resin or resin precursor is described. The furan resin as a curable liquid resin or resin precursor swells the polyurethane strands during infusion and forms a gel-like alloy structure with the polyurethane resin as the solid phase. An important step in the method which assists in preventing cracking during carbonization and which is essential to faithful strand geometry reproduction is the substantial removal of the liquid resin or resin precursor coating from the poly- urethane strand surfaces after the infusion or swelling step. The method allows rapid carbonization with less than about five hours heating of the infused structures without cracking. The resulting carbon strands remain crack-free and strong even when exposed to rapid temperature variations. The carbonized strands are preferably in the form of vitreous or glassy carbon and are particularly useful for high temperature applications in the presence of neutral or reducing gas conditions or in a vacuum.
221676
Franklin Charles H.
Vinton Clarence S.
LandOfFree
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