CARBON FIBER BINDER PITCH

• Main Authors: PIRRO TERRENCE A, LEWIS IRWIN C
• Format: Patent
• Language: English
• Published: 10.07.2001
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; LUBRICANTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PYROLIGNEOUS ACID; REFRACTORIES; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF NATURAL STONE; WORKING CEMENT, CLAY, OR STONE; WORKING-UP; WORKING-UP PITCH, ASPHALT, BITUMEN, TAR

PROBLEM TO BE SOLVED: To provide a process for reducing the coefficients of thermal expansion in the vertical and horizontal directions of a carbon body, and an article prepared using such carbon body. SOLUTION: A carbon fiber bundle may be dispersed substantially as a single monofilament in pitch by stirring a mixture of the fiber and pitch at a temperature which imparts the pitch with a viscosity of about 0.1 to about 5 P. The obtained fiber-pitch binder comprises about 0.5 to about 10.0 wt.% carbon fiber which is dispersed substantially as a randomly arranged single monofilament. This fiber-pitch binder may be used directly as a binder for preparing a carbon body, e.g. a graphite electrode, a pin stock and a special graphite product. This unique binder using an economical amount of carbon fibers has the carbon fibers randomly arranged and therefore possesses abilities to increase the strength of the obtained carbon products and to reduce the coefficient of thermal expansion in one or more directions.