Nippon Zeon Company, Ltd.

Hirokatsu Seya

Akio Maeda

Mitsuyoshi Aonuma

Takeshi Chida

A rubber composition for dust cover boots comprising a copolymer rubber composed of 10 to 60 mole % of epichlorohydrin, 30 to 90 mole % of propylene oxide or both propylene oxide and ethylene oxide with the propylene oxide/ethylene oxide mole ratio being at least 1, and 0 to 15 mole % of an unsaturated epoxide, and a vulcanization agent for the copolymer rubber.

Rubber composition for dust cover boots

A vulcanizate of a copolymer rubber comprising 15 to 70 mol % of an alkylene sulfide, 30 to 85 mol % of an epihalohydrin and 0 to 15 mol % of an unsaturated epoxide, said vulcanizate being used in contact with an alcohol mixed gasoline.

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Kawasaki, Japan

Hirokatsu Seya