4460638 Fiber reinforced glass matrix composites

Carbon Printed

Vol. 23, No. in the U.S.A.

I. pp. i-iii.

WO8-6223185 $3.00 + .W 0 1985 Pergamon Press Ltd.

1985

NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH~ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH@ can be obtained from Pergamon InfoLine Inc., 1340 Old Chain Bridge Road, McLean, Virginia 22101 U.S.A. Copies of complete patents announced in this Section are available from Pergamon InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon InfoLine only.

4460557

4460650

STARTING PITCHES FOR CARBON FIBERS

ACRYLONITRILE FIBERS, A PROCESS FOR PRODUCING A~RYLONITRILE FIBERS, AS WELL AS PRODUCING PEROXIDIZED FIBERS, FIBROUS ACTIVE CARBON OR CARBON FIBERS THEREFROM

Hiroaki Takashima, Osamu Kato, Se&hi Uemura, Shunichi Yamamoto, Takao Hirose, Kawasaki, Japan assigned to Nippon Oil Co Ltd A process for the production of carbon fibers composing heat treating a starting material, melt spinning the resulting precursor pitch, infusibilizing the pitch fibers and carbonizing or graphitizing the infusibilized pitch fibers, characterized in that the starting pitch is obtained by heat treating coal tar and/or coal liquefaction pitch at a specific temperature and a specific hydrogen pressure or by mixing coal tar and/or coal liquefaction tar with at least one nucleus-hydrogenated hydrocarbon of 2-3 rings in a specific mixing ratio and then heat treating the resulting mixture at a specific temperature and a specific pressure. In one embodiment, this invention relates to the starting pitch and carbon fibers obtained by said process.

4460638 FIBER REINFORCED GLASS MATRIX COMPOSITES

Hiroyasu Ogawa, Kazuo Izumi, Kenzi Shimazaki, Shizuoka, Japan assigned to Toho Beslon Co Ltd Acrylonitrile fibers suitable for production of preoxidized fibers, fibrous active carbon and carbon fibers, which have thereon a watersolubie basic aluminum salt of the formula: See Patent for Tabular Presentation PS where (1) A, B and C stand for mutually different acid residues; (2) 1 and q are both an integer or decimal fraction larger than 0; (3) m, n and p are 0 or an integer or decimal fraction and make a which ’ not total (4) l+mEm+nEn+pEl?+q=6 (Em, ‘z’and Ep are the valence numbers of A, B and C, respectively); See Patentfor Mathematical Equation (5) in an amount of 0.005 to 5.0% by weight of aluminum element based on the fiber having the salt.

Loren A Haluska assigned to Dow Corning Cor poration What is disclosed is a method of preparing fiber reinforced glass composites from high modulus fibers, such as carbon fibers and silicon carbide fibers, and silazane polymers. The composites are obtained by heating a pressed and post-cured prepreg to an elevated temperature in an inert atmosphere. Prepregs containing silicon carbide fibers can be fired in air. A simple, low temperature laminating procedure is used in the preparation of these composites in place of the standard hot pressing technique.

4460708 PRODUCTION OF ACTIVATED CARBON FIBERS FROM ACID CONTACTED POLYBENZIMIDAZOLE FIBROUS MATERIAL Dagobert Stuetz assigned to Celanese Corporation