Toyoda Gosei Co., Ltd.

Showa Denko K.k.

Kabushiki Kaisha Toyota Chuo Kenkyusho

Hidenori Hayashi

Rikizou Nakata

Kiyomitsu Terashima

Naotoshi Watanabe

Masahiro Sugiura

Hidekazu Kurimoto

Hidenobu Honda

Mitsumasa Horii

Masataka Sasayama

Yasushi Nakahara

Takayoshi Saiki

Ichiro Sagae

Takao Mizuta

Yohei Terada

A sulfur curing system EPDM composition in which one or more types of vulcanization accelerators selected from thiazole type and sulfenamide type accelerators and one or more types of vulcanization accelerators selected from dithiocarbamate type and thiuram type accelerators are combined together so as to be compounded into the EPDM composition as a vulcanization accelerator, and an automotive brake system rubber component made of the EPDM composition.

EPDM composition and automotive brake system rubber component

A nitrile rubber-polyvinyl chloride polyblend rubber composition containing a paraffinic process oil alone or a combination of paraffinic process oil and one or more other lubricants, which is used as molded articles such as door mirror bracket. The molded articles of the present invention give a much lower sliding resistance.

Molded article

A novel rubber composition is disclosed for use in the preparation of bellows-type rubber hoses for installation in automobile engine compartments. The rubber composition of the present invention contains a chlorinated ethylene-propylene copolymer as base rubber, a triazine-based vulcanizing agent, an acid-acceptor comprising magnesium oxide and hydrotalcite, a sulfur-containing organic carboxylic acid releasing enhancer, and a thioether-based antioxidant heat resistance enhancer. The disclosed bellows-type rubber hoses exhibit excellent heat and ozone resistance, sufficient rigidity to permit a reduction in wall thickness in order to withstand negative pressures associated with automobile engine environments and are amenable to molding with limited impact on releasing characteristics.

Bellows-type rubber hoses for use in automobiles

An ethylene propylene rubber composition is disclosed, comprising 100 parts by weight of a polymer component, at least 5 parts by weight of a softener, and a hydrated magnesium silicate-based clay mineral in an amount of from 0.05 to 0.5 times the weight of said softener. The rubber composition provides a molded article free from bleeding of softeners.

Ethylene propylene rubber composition

A sealing part formed a peroxide vulcanizate of a rubber compound having as a polymer component an EPDM mixture of 50 to 90 parts by weight of an EPDM having a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 35 to 55, and 50 to 10 parts by weight of a low-Mooney EPDM (a sub-polymer) having a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 5 to 25. The sealing part of the present invention has a high resistance to low-temperature compression permanent strain and is excellent in the kneadability of a rubber compound for producing the sealing part.

Sealing part for hydraulic cylinder

Growing community of inventors

Gifu, Japan

Hidenori Hayashi