Patent ID: 6117927
Filing Date: 2000-09-12
Classification: B60C,C08C,C08L

Abstract:
A method for producing a rubber composition comprising the steps of:polymerizing a conjugated diene monomer, or a conjugated diene monomer and a vinyl aromatic hydrocarbon monomer by using an organic lithium initiator to form a polymer or copolymer;modifying an active terminal of the polymer or copolymer with a modifier capable of having a reactivity with a silica surface and represented by general formula (I) to form a terminally-modified polymer or terminally-modified copolymer; andmixing the terminally-modified polymer or terminally-modified copolymer with a silica in the presence of an organic solvent,wherein general formula (1) isR.sup.1.sub.m Si(OR.sup.2).sub.n X.sub.(4-m-n)wherein R.sup.1 denotes a substituent having an epoxy group or an unsaturated carbonyl group, X denotes an alkyl group or a halogen atom, R.sup.2 denotes a group selected from the group consisting of aliphatic, alicyclic and aromatic hydrocarbons of 1 to 20 carbon atoms, m denotes an integer from 1 to 3, n denotes an integer from 1 to 3 and m+n is an integer from 2 to 4.