Patent ID: 6716925
Filing Date: 2004-04-06
Classification: B60C,C08L,Y02T

Abstract:
A rubber composition comprising, based on 100 parts by weight (phr) of rubber,(A) from 10 to 90 phr of a terpolymer rubber comprised of repeat units derived from (1) 30 to 89 weight percent of a conjugated diene monomer which contains from 4 to 8 carbon atoms; (2) 10 to 50 weight percent of a vinyl substituted aromatic monomer; and (3) 1 to 20 weight percent of at least one co-monomer selected from the group consisting of the following general formulas I, II, and III: wherein R represents a hydrogen atom or an alkyl group containing from 1 to 8 carbon atoms; wherein R1 represents a saturated alcohol group containing from 1 to 8 carbon atoms; (B) from 10 to 90 phr of a rubber comprised of repeat units derived from (1) 30 to 99 weight percent of a conjugated diene monomer which contains from 4 to 8 carbon atoms; (2) zero to 50 weight percent of a vinyl substituted aromatic monomer; and (3) 1 to 20 weight percent of an olefinic unsaturated nitrile selected from the group consisting of acrylonitrile, methacrylonitrile, ethacrylonitrile, crotononitrile and mixtures thereof.