High-hardness and high-modulus rubber composition containing 1,2

Details High-hardness and high-modulus rubber composition containing 1,2 High-hardness and high-modulus rubber composition containing 1,2

1979-01-05

1980-09-02

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 237M, 260 336AQ, 260 42, 260 459QB, 525236, 525237, C08L 700, C08L 906

Patent

active

042205646

ABSTRACT:
A novel rubber composition is obtained by blending a rubber mixture consisting of 15 to 50 parts by weight of 1,2-polybutadiene having a 1,2-addition unit content of 70% or more, a crystallinity of 5 to 40% and an intrinsic viscosity [.eta.] of 0.7 dl/g or more (as measured in toluene at 30.degree. C.) and 85 to 50 parts by weight of at least one rubber selected from the group consisting of natural rubber and diene-based rubbers with 3 to 10 parts by weight of sulfur per 100 parts by weight of said rubber mixture. Said rubber composition has a desirable processability and exhibits, on curing, high hardness, high modulus, low temperature dependency of physical properties, low heat generation and excellent blow-out resistance. It is suitable as a rubber material for use in various low profile automobile tires such as radial tires.

REFERENCES:
patent: 3696062 (1972-10-01), Lesage et al.
patent: 3827991 (1974-08-01), Ando et al.

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