Halogenated butyl rubber graft copolymers

Details Halogenated butyl rubber graft copolymers Halogenated butyl rubber graft copolymers

1991-05-15

1993-11-23

Kight, III, John

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

Synthetic resins

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

525235, 525232, 525242, 525244, 525245, 525248, 525250, C08L 900, C08L 4700

Patent

active

052644944

ABSTRACT:
A process for grafting halogenated butyl rubbers with polymers based on conjugated diolefin monomers is provided which comprises mixing a first solution of halogenated butyl rubber with a second solution of a living alkali metal terminated polymer based on conjugated diolefin monomers and having a number average molecular weight of at least 40,000 at a temperature of from about -10.degree. C. to about 80.degree. C. for a period of time of from about 30 minutes to about 24 hours whereby the graft copolymer is formed. Rubber compositions comprising the halogenated butyl rubber graft copolymers upon vulcanization exhibit improved abrasion resistance and wet skid resistance while a desirable balance of other physical properties is maintained.

REFERENCES:
patent: 3904708 (1975-09-01), Kennedy et al.
patent: 5071913 (1991-12-01), Powers et al.
Journal of Polymer Science, vol. 6, No. 10, Oct. 1968 pp. 2773-2783; Y. Minoura et al. "Reaction of Chlorine-Containing Polymers with Living Polymers".
Polymer Letters vol. 5 pp. 641-646 (1967) "Graft Copolymers of Rubbers and Polystyrene Prepared with Living Polymers".

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