Polybutadiene rubber compositions

Details Polybutadiene rubber compositions Polybutadiene rubber compositions

C - Chemistry, Metallurgy

08

L

400/6460

C08L 9/00 (2006.01)

Patent

CA 1135895

ABSTRACT OF THE DISCLOSURE: A polybutadiene rubber composition comprising (A) a polybutadiene rubber obtained by solution poly- merization and having a Mooney viscosity Image of 60 - 110 and a 1,4-configuration content of not less than 60%, preferably not less than 70%, and (B) a poly- butadiene polymer obtained by solution polymerization and having a viscosity-average molecular weight of 20,000 - 140,000, preferably 40,000 - 100,000, and a 1,4-configuration content of not less than 60%, prefer- ably not less than 70%, in which composition the weight ratio of (A)/(B) is 100/5 - 100/150, preferably 100/35 - 100/100, and the Mooney viscosity Image of which composition is 20 - 70. This composition is high in tackiness in the unvulcanized state and also excellent in the physical properties of vulcanizate.

359070

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