Core-shell polymer for use in tire treads

Details Core-shell polymer for use in tire treads Core-shell polymer for use in tire treads

1991-11-04

1993-08-17

Michl, Paul R.

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

Synthetic resins

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

525902, 526340, C08F25702, C08F27904

Patent

active

052370151

ABSTRACT:
A novel rubbery polymer suitable for use in tire tread formulations is characterized in that the polymer comprises polymer particles which have from 2 to 6 domains, each domain comprising from 100 to about 40 weight percent of at least one C.sub.4 to C.sub.8 conjugated diolefin monomer, from 0 to about 60 weight percent of at least one C.sub.3 3 to C.sub.6 alkenyl nitrile monomer and from 0 to about 60 weight percent of at least one C.sub.8 to C.sub.12 monovinylidene aromatic monomer for a total of 100 weight percent of the domain, the monomer composition and/or molecular weight of one domain of each polymer particle differing from the monomer composition and/or molecular weight of each of the other domains of the polymer particle. A process for the production of the rubbery polymer is provided together with a rubber composition comprising the rubbery polymer and at least one diene-based polymer.

REFERENCES:
patent: 2384547 (1945-09-01), Fryling
patent: 3305516 (1967-02-01), Smith
patent: 4855337 (1989-08-01), Dequatre et al.
patent: 5034462 (1991-07-01), Stiberth et al.
Abstract-Japanese Patent 75 038 133-date Dec. 8, 1975-Bridgestone Tire Co. Ltd.
Paper presented 125th meeting of the Rubber Division, ACS, pp. 178-185, May 8-11, 1984-The "Integral Rubber"-An Approach To An Ideal Tire Tread Rubber.

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