Patent ID: 8258241
Filing Date: 2012-09-04
Classification: B60C,C08C,C08K,C08L

Abstract:
1. A method for producing a modified conjugated diene polymer comprising (A) subjecting a conjugated diene polymer having a cis-1,4-bond content of 98.5% or more and possessing an active end to a modification reaction to introduce an alkoxysilane compound having two or more reactive groups including an alkoxysilyl group into the active end of the conjugated diene polymer, and (B) subjecting the residue of the alkoxysilane compound introduced into the active end to a condensation reaction in the presence of a condensation catalyst that includes at least one element selected from the elements of the groups 4A, 2B, 3B, 4B, and 5B of the periodic table, wherein the conjugated diene polymer has been polymerized in the presence of a catalyst composition that includes a mixture of components (a) to (c) as the main component, where component (a) is a lanthanoid-containing compound that contains at least one lanthanoid element or a reaction product obtained by reacting the lanthanoid-containing compound with a Lewis base, component (b) is at least one compound selected from an aluminoxane and an organoaluminum compound shown by the general formula (1): in which R