Modified diene polymer rubbers

Details Modified diene polymer rubbers Modified diene polymer rubbers

1988-05-04

1989-12-05

Briggs, Sr., Wilbert J.

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

Synthetic resins

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

525236, 525237, 525241, 525293, 5253328, 5253329, 5253331, 5253332, 525377, C08C 1922, C08C 1928, C08F27902

Patent

active

048853380

ABSTRACT:
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: ##STR1## wherein R.sup.1 and R.sup.2 are independently an alkyl group and n is an integer, and a nitroamino compound of the formula: ##STR2## wherein R.sup.3 to R.sup.6 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 show an increased impact resilience and a reduced hardness at low temperatures.

REFERENCES:
patent: 3322738 (1967-05-01), Uraneck et al.
patent: 3756969 (1973-09-01), Danielson
patent: 3870678 (1975-03-01), Harpell

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