High vinyl polybutadiene rubber containing halogen having enhanc

Details High vinyl polybutadiene rubber containing halogen having enhanc High vinyl polybutadiene rubber containing halogen having enhanc

1989-11-13

1992-02-18

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...

152564, C08C 1914

Patent

active

050895630

ABSTRACT:
High vinyl polybutadiene rubber has a combination of properties which makes it highly suitable for utilization in many applications. For instance, high vinyl polybutadiene possesses a number of properties that make it desirable for utilization in building tires. However, high vinyl polybutadiene rubber does not generally have optimal cure characteristics. More specifically, high vinyl polybutadiene rubber has a slow cure rate and in some cases the ultimate degree of cure which can be attained is lower than desired. This invention discloses a high vinyl polybutadiene rubber which has enhanced cure characteristics. The high vinyl polybutadiene rubbers of this invention are prepared by lightly halogenating a standard high vinyl polybutadiene which has a vinyl content of at least about 60%. This invention specifically reveals a high vinyl polybutadiene rubber having enhanced cure characteristics which is comprised of polybutadiene having a vinyl content of at least about 60% wherein the polybutadiene contains about 0.1 to about 2.5 percent halogen atoms based upon the weight of the polybutadiene.

REFERENCES:
patent: 2631984 (1953-05-01), Crawford et al.
patent: 4650832 (1987-03-01), Kowalski et al.
R. T. Morrissey, "Halogenation of Ethylene Propylene Diene Rubbers", Apr. 27-30, 1971, pp. 1025-1042.

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