Patent ID: 9587060
Date: 2017-03-07
CPC Classifications: B60C,C07C,C07F,C08F,C08K,C08L

Claim:
1. A rubbery composition which is comprised of (A) a silica filler, (B) optionally, a silica coupling agent, wherein the silica coupling agent is present at a maximum level of less than 5 phr, and (C) a rubbery polymer which is comprised of repeat units that are derived from (1) at least one conjugated diolefin monomer, and (2) from 0.1 phm to 5 phm of a functionalized monomer having the structural formula: wherein the R 1 groups can be the same or different and represent hydrogen atoms or alkyl groups containing from 1 to about 8 carbon atoms, wherein R 2 represents a hydrogen atom or an alkyl group containing from 1 to about 8 carbon atoms, wherein R 3 represents a hydrogen atom or an alkyl group containing from 1 to about 8 carbon atoms, and wherein R 4 represents a hydrogen atom or an alkyl group containing from 1 to about 8 carbon atoms, with the proviso that if R 3 represent an alkyl group then R 4 represents a hydrogen atom, and with the proviso that R 4 represents an alkyl group then R 3 represents a hydrogen atom, wherein the repeat units that are derived from the functionalized monomer are distributed throughout the rubber polymer in an essentially random manner, wherein the rubbery polymer is not coupled, and wherein the rubbery polymer has a monomodal molecular weight distribution.