Patent ID: 10259895

Abstract:
There is provided a process for preparing a branched conjugated diene polymer by copolymerizing 1 to 100% by weight of a branched conjugated diene compound (1) monomer: wherein R1 is an aliphatic hydrocarbon having 6 to 11 carbon atoms, with 99 to 0% by weight of a conjugated diene compound (2) monomer:  wherein R2 and R3 are the same or different and each is a hydrogen atom, or the like, and/or 99 to 0% by weight of a vinyl compound (3) monomer:  wherein R4 is an aliphatic hydrocarbon group having 6 to 10 carbon atoms, or the like,  wherein the process comprises a step of polymerizing by adding a monomer solution successively into a catalyst solution. The branched conjugated diene polymer is useful as a rubber component for a tire for improving processability.