et de Recherches
The method is of the type in which carbon (3) is put into contact with a solution (2) of an amine compound in a bipolar solvent with the carbon being positively polarized relative to a cathode (5). According to the invention, the solvent is an organic compound, preferably an aprotic compound, having a high anode oxidation potential, and the solution is practically free from water.
4846908 PROCESS FOR PREPARING A FIBER REINFORCED RESIN MATRIX PREFORM Donald C Aldrich, Robert C Buchanan, John F Sollinger assigned to E I Du Pont de Nemours and Company Process for preparing preforms and composite articles from carbon fiber reinforced matrix resins braided to shape on a mandrel and then converting to final composite article by fully or partially curing in a mold followed by post curing if required.
4839006 SURFACE TREATMENT PROCESS FOR CARBON FIBERS Fujio Nakao, Hirofumi Uno, Hiroshima, assigned to Mitsubishi Rayon Co Ltd
4847021 PROCESS FOR PRODUCING HIGH DENSITY CARBON AND GRAPHITE ARTICLES Lionel C Montgomery, John M Criscione signed to Union Carbide Corporation
An acrylic fiber having applied thereto a polyaminopolysiloxane compound oxyalkylene having a viscosity of from 5 to 500 poises at 25 degrees C. and which is represented by formula (I) as an oiling agent: See Patent for Chemical Structure (I) wherein Rl, R2, R3, R4, R5, and R6 each represents a lower alkyl group or an aryl group, R7 represents a hydrogen atom, a lower alkyl group or an aryl group, R8 represents H or -CH3, or See Patent for Chemical Structure (wherein RlO, Rll and R12 each represents a hydrogen atom, a lower alkyl group or an aryl group), R9 represents an alkylene group having not more than 5 carbon atoms, an arylene group, or a single bond, A represents a group See Patent for Chemical Structure (wherein R13 and R14 each represents H, -CH3, -C2H5), B represents a group See Patent for Chemical Structure (wherein R15: H or -CH3, and m and n each represents 0 or an integer of from 1 to 10, provided that m+n) or = l), X and Z each represents an integer from 1 or more, and W and Y each represents 0 or an integer of 1 or more.
Carbonaceous powders are blended with a high coking value pitch, e.g. mesophase pitch, formed into shaped bodies and then simultaneously compressed and baked in an envelope of finely divided, non-reactive particles, followed by graphitizing, if required, to produce high strength, high density carbon or graphite articles.
4830845 PRECURSOR FOR PRODUCTION OF PREOXIDIZED FIBERS OR CARBON FIBERS Hiroyasu Ogawa, Tetsuro Shigei, Shizuoka, Japan assigned to Toho Belson Co Ltd
A process for surface treatment of carbon fiber of which modulus is not lower than 30 ton/mm2, in two steps, which comprises the steps of subjecting a carbon fiber as an anode to a first electrolytic treatment in an aqueous solution of inorganic acidic electrolyte or of neutral salt electrolyte, and then subjecting the treated fiber to a second electrolytic treatment in an aqueous solution of ammonium salt of carbonic acid or of inorganic alkaline electrolyte.
4840762 PROCESS FOR PREPARATION OF HIGH-PERFORMANCE GRADE CARBON FIBERS Toru Sawaki, Hideharu Nakamura, Jiro Sadanobu, signed to Teijin Ltd
Tsutomu Japan as-
A process for the preparation of highperformance grade carbon fibers, which comprises attaching a fine powder of at least one