Ube Industries, Inc.

Hideo Kurihara

Denichi Oda

Kouhei Kaijiri

Kunio Oda

Takeshi Takaki

Takeshi Tanabe

Shinji Yamamoto

Kazuyoshi Fujii

Yukio Matsumoto

Tatsuo Wada

Osamu Hayashi

A fine fiber-reinforced elastomer composition (A) having a high elastic modulus, mechanical strength and creep resistance includes (a) 100 parts by weight of elastic component having a glass-transition temperature of 0.degree. C. or less, (b) 30 to 500 parts by weight of a polyolefin component and (c) 10 to 500 parts by weight of a polyamide component dispersed in the fine fiber form in the matrix consisting of the components (a) and (b), these components (a), (b) and (c) being chemically bonded to each other through a binding agent (d), for example, a silane coupling agent, and is useful for producing an elastic material having a high elastic modulus, an excellent fatigue resistance and a high isotropy, by admixing an additional elastic component (B) to the elastomer composition (A).

Fine fiber reinforced thermoplastic elastomer composition and process

A reinforced rubber composition comprising 100 parts by weight of a vulcanizable rubber including 1 to 100 parts by weight of fine short fibers of a fiber forming polyamide buried therein, and the polyamide and the rubber are bonded through a silane coupling agent. This reinforced rubber composition is suitable for use as automobile tires and the parts thereof and rubber products such as, rubber houses, rubber belts, rubber parts for automobiles, and footwear materials.

Fiber-reinforced rubber composition and production process and use

A hydrophilic modified diene polymer material is produced by the steps of epoxidizing a diene polymer material consisting of at least one member selected from rubber polymers which have a molecular weight of 10,000 or more and contain an 85 molar % of more 1,4-addition structure based on the entire molar amount of double bonds contained therein, and crystalline 1,2-polybutadiene polymers which have a melting point of from 60.degree. C. to 170.degree. C., and a reduced viscosity (nsp/c) of 0.2 or more determined in a tetrahydronaphthalene solution in a concentration of 200 mg/100 ml at a temperature of 100.degree. C., and contain a 75 molar % or more 1,2-addition structure based on the entire molar amount of double bonds contained therein, for example, with a combination of a carboxylic acid and a peroxide compound, or a carboxylic peracid, to an extent such that the degree of epoxidization of the rubber polymers is in the range of from 5% to 60% and the degree of epoxidization of the crystalline 1,2-polybutadiene is in the range of from 5% to 45%; and ring-opening at least a portion of the epoxy rings in the resultant epoxidized polymeric material by heating it in the presence of a tertiary amine and a carboxylic acid.

Process for producing hydrophilic polymers

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Ichihara, Japan

Hideo Kurihara