PROCESS FOR PRODUCING MODIFIED POLYMER, MODIFIED POLYMER OBTAINED BY THE PROCESS, AND RUBBER COMPOSITION

摘要

A process for producing a modified polymer which comprises modifying a polymer having in the molecule an active site of the organometal type by reacting the active site with a hydrocarbyloxysilane compound and adding a condensation accelerator to the reaction system during the reaction and/or after completion thereof; and a rubber composition containing a modified polymer obtained by the process. The rubber composition preferably comprises (A) 100 parts by weight of a rubber ingredient comprising at least 30 wt.% the modified polymer and (B) 10 to 100 parts by weight of silica and/or carbon black. In the rubber composition containing silica and/or carbon black, the rubber ingredient has enhanced interaction with the silica and carbon black. The composition is hence improved in failure characteristics and wearing resistance and reduced in heat build-up, and can have satisfactory workability.