Patent ID: 6258886
Filing Date: 2001-07-10
Classification: B60C,C08F,Y10S

Abstract:
A vulcanizable elastomer composition comprising:a macro-branched diene polymer having the formulaP-[(polymer)-Me].sub.nprior to quenching, wherein P represents a particle having a diameter of about 1 micron to about 1000 microns comprising around rubber, Me is a Group IA alkali metal atom, n is an integer equal to or greater than 3, and (polymer) represents a polymer chain covalently bonded to the particle,wherein the polymer component of the polymer chain is selected from the group consisting of conjugated diolefin monomers having from about 4 to about 12 carbon atoms, copolymers and terpolymers of the conjugated diolefin monomers with monovinyl aromatic monomers having from about 8 to about 20 carbon atoms;and from about 5 to about 80 parts by weight of carbon black per 100 parts by weight of the polymer.