Bridgestone Corporation

Tomoharu Yamada

Ryota Fujio

A novel halogenated polybutadiene series elastomer is produced by reacting a polybutadiene series elastomer with a particular active halogen group-containing compound in the presence of a particular organic halogenating agent. The resulting halogenated polybutadiene series elastomer can be subjected to heat-resistant crosslinking with a particular polyvalent amine, and is suitable for the preparation of rubber compositions for tire requiring the heat resistance.

Halogenated polybutadiene series elastomers, method of producing the

Two vulcanizates are adhered to each other by (I) applying a particular rubber cement composition to surfaces of the vulcanizates to be adhered and drying it; and (II) sandwiching an unvulcanized rubber sheet of a particular cushion rubber composition between the applied surfaces of the vulcanizates and fulcanizing them at a temperature of 0.degree.-100.degree. C. under pressure.

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Musashino, Japan

Tomoharu Yamada