Tire tread rubber compositions

Details Tire tread rubber compositions Tire tread rubber compositions

1987-07-17

1988-12-13

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525194, 525237, 525349, 525352, C08C 1920

Patent

active

047911735

ABSTRACT:
A synthetic rubber (SR) tire tread of styrene-butadiene rubber (SBR) and butyl rubber which SR is essentially free of natural rubber (NR), upon vulcanization with sulfur in the presence of a combination of sulfenamide accelerators, provides excellent oxidative stability, resistance to hardening, and flex resistance, despite increasing the level of sulfur to an amount in the range from 2.0-3.0 phr, as long as the total amount of sulfenamide accelerators is less than 2.0 phr and there is more TCS than BTS. The crosslink network generated by the use of TCS in combination with BTS, which combination produces poor oxidation stability in a predominantly NR containing rubber, is not produced in SR.

REFERENCES:
patent: 4041043 (1977-08-01), Gattuso
patent: 4119588 (1978-10-01), Carpino
patent: 4309318 (1982-01-01), Ahagon
patent: 4487892 (1984-12-01), Ohmori
patent: 4499228 (1985-02-01), Ogawa

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