Modified diene polymer rubbers

Details Modified diene polymer rubbers Modified diene polymer rubbers

1992-03-23

1993-02-23

Seidleck, James J.

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

Synthetic resins

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

525271, 525288, 525279, 525308, 525313, 525316, C08F27902

Patent

active

051891093

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 akali metal-containing polymer with an acrylamide modifier compound of the formula: ##STR1## wherein R.sup.1 is hydrogen atom or methyl group, R.sup.2 and R.sup.3 are independently an alkyl group and n 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 and with or without other rubbers 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: 3244664 (1966-04-01), Zelinski et al.
patent: 3322738 (1967-05-01), Uraneck
patent: 4148838 (1979-04-01), Martin
patent: 4647625 (1987-03-01), Aonuma et al.

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