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4670129 Pitch for production of carbon fibers
II
New Patents
A highly electroconductive graphite continuous filament is described, which is composed of a carbon filament as a substrate and a graphite layer having a layer spacing d (0,0,2) of not larger than 3.363 angstroms as an outer skin layer. The graphite continuous filament is prepared by depositing easily graphitizable carbon on the substrate and heat-treating the carbondeposited substrate at a temperature of at least 2,5OO;E20C. + RE
4668579 INTERSTITIALLY PROTECTED OXIDATION RESISTANT CARBON-CARBON COMPOSITE Thomas Strangman, Robert J Keiser assigned to The United States of America as represented by the Secretary of the Air Force The carbon fiber bundles in a carbon-carbon composite are protected against oxidation by coating the fiber bundles with at least one protective layer consisting of an underlayer portion of boron carbide and an overlayer portion of silicon carbide.
4670059 INCREASED SOLUBILITY OF CARBON BLACK David E Hackleman, Loren Johnson, Kenneth A Norton assigned to Hewlett Packard Company A process for increasing the solubility of carbon black in desired solvents is provided. The process comprises (a) forming a suspension of the carbon black in a non-reactive medium, such as an aromatic hydrocarbon, (b) adding a silylating agent, such as an organosilane, (c) removing the reaction product of the silating agent and the carbon black, and (d) forming a dispersion of the reaction product in a solvent for use as an ink-jet printing fluid. The increased dispersibility of the carbon black of the invention results in a more non-settling suspension of the carbon black E37 molecules + 38 + 0 than otherwise obtained. + REned. + RE
4670129 PITCH FOR PRODUCTION OF CARBON FIBERS Kazuhito Tate, Hajime Yoshida, Kazuhiro Yanagida, Kanagawa, Japan assigned to Mitsubishi Oil Co Ltd
4668867 RADIATION GAUGE FOR DE~RM~ING WEIGHT PERCENTAGES OF THE CONSTITUENTS OF GRAPHITEEPOXY COMPOS~E MATERIALS Dean E Lingenfelter assigned to Lockheed Missiles & Space Company Inc A sample 10 of a composite material, such as a graphite-epoxy composite, is exposed to radiation in three distinct energy bands emanating from sources 12, 13 and 14, respectively. Corresponding detectors 16, 17 and 18 are positioned to measure the amount of energy in each band transmitted through the sample. Weight percentages of three different constituents of the sample 10 are calculated from a relatively simple algorithm whose variables include a ratio for each of said energy bands of the amount of energy that would be detected if the sample were not present in the radiation to the amount of energy transmitted through the sample when the sample is exposed to the radiation.
A pitch having optical anisotropy for use in production of carbon fibers, wherein the pitch is prepared using a compound represented by the formula (I) as a raw starting material and subjecting the compound to thermal modification and then removing light fractions See Patentfclr ~~~~~~a~structure (I) wherein Rl, R2, R3, R4, R6, R7, R8, R9 and RlO each represents a hydrogen atom or a methyl group or an ethyl group; R5 represents a hydrogen atom or a methyl group; the total number of carbon atoms of RI, R2, R3 and R4 is from 2 to 4 and the total number of carbon atoms of R6, R7, R8 and R9 is from 2 to 4; and m is at least 3. The pitch is substantially homogeneous in quality, has a low softening point and has excellent molecular orientation.
4670201 PROCESS FOR MAKING PITCHFREE GRAPHITIC ARTICLES Lionel C Montgomery, John M Criscione assigned to Union Carbide Corporation
New Patents
A highly electroconductive graphite continuous filament is described, which is composed of a carbon filament as a substrate and a graphite layer having a layer spacing d (0,0,2) of not larger than 3.363 angstroms as an outer skin layer. The graphite continuous filament is prepared by depositing easily graphitizable carbon on the substrate and heat-treating the carbondeposited substrate at a temperature of at least 2,5OO;E20C. + RE
4668579 INTERSTITIALLY PROTECTED OXIDATION RESISTANT CARBON-CARBON COMPOSITE Thomas Strangman, Robert J Keiser assigned to The United States of America as represented by the Secretary of the Air Force The carbon fiber bundles in a carbon-carbon composite are protected against oxidation by coating the fiber bundles with at least one protective layer consisting of an underlayer portion of boron carbide and an overlayer portion of silicon carbide.
4670059 INCREASED SOLUBILITY OF CARBON BLACK David E Hackleman, Loren Johnson, Kenneth A Norton assigned to Hewlett Packard Company A process for increasing the solubility of carbon black in desired solvents is provided. The process comprises (a) forming a suspension of the carbon black in a non-reactive medium, such as an aromatic hydrocarbon, (b) adding a silylating agent, such as an organosilane, (c) removing the reaction product of the silating agent and the carbon black, and (d) forming a dispersion of the reaction product in a solvent for use as an ink-jet printing fluid. The increased dispersibility of the carbon black of the invention results in a more non-settling suspension of the carbon black E37 molecules + 38 + 0 than otherwise obtained. + REned. + RE
4670129 PITCH FOR PRODUCTION OF CARBON FIBERS Kazuhito Tate, Hajime Yoshida, Kazuhiro Yanagida, Kanagawa, Japan assigned to Mitsubishi Oil Co Ltd
4668867 RADIATION GAUGE FOR DE~RM~ING WEIGHT PERCENTAGES OF THE CONSTITUENTS OF GRAPHITEEPOXY COMPOS~E MATERIALS Dean E Lingenfelter assigned to Lockheed Missiles & Space Company Inc A sample 10 of a composite material, such as a graphite-epoxy composite, is exposed to radiation in three distinct energy bands emanating from sources 12, 13 and 14, respectively. Corresponding detectors 16, 17 and 18 are positioned to measure the amount of energy in each band transmitted through the sample. Weight percentages of three different constituents of the sample 10 are calculated from a relatively simple algorithm whose variables include a ratio for each of said energy bands of the amount of energy that would be detected if the sample were not present in the radiation to the amount of energy transmitted through the sample when the sample is exposed to the radiation.
A pitch having optical anisotropy for use in production of carbon fibers, wherein the pitch is prepared using a compound represented by the formula (I) as a raw starting material and subjecting the compound to thermal modification and then removing light fractions See Patentfclr ~~~~~~a~structure (I) wherein Rl, R2, R3, R4, R6, R7, R8, R9 and RlO each represents a hydrogen atom or a methyl group or an ethyl group; R5 represents a hydrogen atom or a methyl group; the total number of carbon atoms of RI, R2, R3 and R4 is from 2 to 4 and the total number of carbon atoms of R6, R7, R8 and R9 is from 2 to 4; and m is at least 3. The pitch is substantially homogeneous in quality, has a low softening point and has excellent molecular orientation.
4670201 PROCESS FOR MAKING PITCHFREE GRAPHITIC ARTICLES Lionel C Montgomery, John M Criscione assigned to Union Carbide Corporation