The Goodyear & Tire Rubber Company

Ching-Chian Chang

Robert Henry Vogliano

Cheng Shaw

Kirkwood S Cottman

John R White

A method and apparatus for continuously processing fiber into an elastomeric component uses an expanding die () for orienting fibers in other than the processing direction of the extrusion. In one embodiment, an injection mold () is used with the expanding die (), and in another embodiment, an extruder () is used with expanding die (). Processing parameters may be alteredto control the direction of orientation of fibers () in the elastomer component. Orientation of fibers () in an extrudate () is dependent on the processing speed viscosity of the elastomer, pressure of extrusion, the length land land height hand hof gate () and expansion cavity (), respectively, of the expansion die ().

Orientation of short fibers in a continuous process

This invention is based upon the unexpected discovery that the reactivity of the most important monomers commonly used in synthesizing tackifier resins with aluminum halide catalysts can be enhanced by conducting the polymerization in the presence of an allylic halide. For instance, the conversions of 2-methyl-2-butene, cis-piperylene, and cyclopentene that are attained in polymerizations that are catalyzed with aluminum halide catalysts are increased by conducting the polymerization in the presence of an allylic halide, such as allyl chloride. Increased monomer conversion is of great commercial importance because it leads to an increased level of efficiency and reactor capacity. The present invention more specifically discloses a process for synthesizing a resin having characteristics that make it particularly useful as a tackifier resin, said process comprising the polymerization of an unsaturated hydrocarbon monomer mixture in the presence of aluminum halide and an allylic halide, wherein the unsaturated hydrocarbon monomer mixture is comprised of unsaturated hyrdocarbon monomers containing from about 4 to about 18 carbon atoms, and wherein said process is conducted in the absence of tantalum compounds. The subject invention further reveals a process for synthesizing a resin having characteristics that make it particularly useful as a tackifier resin, said process comprising the polymerization of an unsaturated hydrocarbon monomer mixture in the presence of aluminum halide and an allylic halide, wherein the unsaturated hydrocarbon monomer mixture is comprised of monomers including but not limited to 2-methyl-2-butene, cis-piperylene, trans-piperylene, cyclopentene, and additional unsaturated hyrdocarbon monomers containing from about 4 to about 18 carbon atoms, wherein said process is conducted in the absence of tantalum compounds.

Process for synthesizing tackifier resin

A combination rubber injection gate system ( ) and method of injection molding rubber to produce desired flow patterns in the rubber is disclosed. The combination gate ( ) directs rubber through a first region ( ) to flow at cross angles ( ) through the injection gate ( ), relative to the direction of flow of the rubber ( ) through the injection gate ( ). The rubber ( ) is then directed through an adjacent region ( ) to flow through the injection gate ( ) at a direction parallel to the direction of flow of the rubber ( ) through the entire injection gate ( ). The combination gate ( ) yields a highly mixed and uniform flow of rubber ( ) that is particularly useful when injection molding fiber-loaded rubber where it is desired to orient the fibers in a particular direction.

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Copley, OH, United States of America

Ching-Chian Chang