Modified diene polymer rubbers

Details Modified diene polymer rubbers Modified diene polymer rubbers

C - Chemistry, Metallurgy

08

C

400/1125, 400/64

C08C 19/42 (2006.01)

Patent

CA 1303264

Abstract of the Disclosure A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, and reacting the alkali metal-containing polymer with a modifier selected from the group consisting of a nitroalkyl acrylate of the formula: Image wherein R1 and R2 are independently an alkyl group and n is an integer, and a nitroamino compound of the formula: Image wherein R3 to R6 are independently an alkyl group, and m is an integer, said alkali metal-containing diene polymer being prepared by a living anionic polymerization using an alkali metal-based catalyst or by an addition reaction of a diene polymer having conjugated diene units and an alkali metal-based catalyst in a hydrocarbon solvent. The modified diene polymers can be incorporated with usual rubber additives to provide rubber compositions for various purposes, and the cured products how an increased impact resilience and a reduced hardness at low temperatures.

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