Ntn Corporation

Japan Synthetic Rubber Co., Ltd.

Jxtg Nippon Oil & Energy Corporation

Takeyoshi Konomoto

Minoru Ishijima

Tatsuo Nakajima

Toshio Teramoto

Ko Hasegawa

Takashi Arai

Yuichi Asano

Tomoshige Kobayashi

Taku Itagaki

Toshihumi Ueshima

Yasuha Tokumo

The present invention provides a grease composition for constant velocity joints, which includes a lubricating base oil, a thickener including a nitrogen-containing compound, a triglyceride, a diester, and a boron nitride, wherein a total content of the triglyceride and the diester is 1 to 5 mass % based on a total amount of the grease composition, and a mass ratio of a content of the triglyceride to a content of the diester (triglyceride/diester) is 0.3 to 1.5.

Grease composition for constant velocity joints, and constant velocity joint in which same is sealed

A corrugated portion is formed in one end edge portion of the metallic shaft main body (), and a triangular corrugated portion () is formed in an end edge portion of the shaft auxiliary body () on the metallic shaft main body side. The metallic shaft main body () and the shaft auxiliary body () are integrated by being linearly arranged by way of meshing that brings a side of the triangular corrugated portion () on the main body side and a side of the triangular corrugated portion () on the auxiliary body side into contact with each other. A fiber orientation angle (&#x3b8;) of the fiber reinforced plastic of the shaft auxiliary body () is set so as to be in the same direction as a direction of stress generated in a hypotenuse of each triangular portion under a torque load state.

Power transmission shaft

The composition of the present invention is a thermoplastic elastomer composition obtained by dynamically crosslinking (A) 51-95% by weight of a thermoplastic polyester elastomer and (B) 49-5% by weight of a rubber during kneading. The composition is excellent in all of hardness, tensile strength, tensile elongation, compression set, thermal aging resistance, oil resistance and molded product appearance, and is suitably used as a material for automobile parts such as joint boot and the like.

Thermoplastic elastomer composition

A thermoplastic elastomer composition comprising (A) 50-98% by weight of a thermoplastic polyester elastomer, (B) 50-2% by weight of a rubber and (C) a polyorganosiloxane in a proportion of 0.01-10 parts by weight per 100 parts of the total of the components (A) and (B). The above thermoplastic elastomer composition enables one to improve the flexibility and compression set of the thermoplastic polyester elastomer excellent mechanical properties, heat resistance and oil resistance without impairing the abrasion resistance of the thermoplastic polyester elastomer.

Growing community of inventors

Shizuoka, Japan

Takeyoshi Konomoto