METHOD FOR MANUFACTURING CONJUGATED DIENE RUBBER

A method of production of a conjugated diene rubber comprising a step of polymerizing isoprene or a monomer mixture containing isoprene and an aromatic vinyl monomer in an inert solvent by using a polymerization initiator so as to form a polymer block (A) having an active end, a step of mixing the polymer block (A) having an active end and 1,3-butadiene or a monomer mixture containing 1,3-butadiene and an aromatic vinyl monomer to continue a polymerization reaction so as to obtain a conjugated diene polymer chain having an active end and containing a polymer block (A) and a polymer block (B), and a step of reacting a compound represented by the following general formula (1) with the active end of the conjugated diene polymer chain having an active end: wherein, in the general formula (1), Xrepresents a functional group selected from a hydrocarbyloxy group, halogen group, and hydroxyl group, Rrepresents a substituted or unsubstituted hydrocarbon group, each of Rand Rindependently represents a substituted or unsubstituted hydrocarbon group, Rand Rmay bond with each other to form a ring structure together with the nitrogen atom represented by "N" in the general formula (1), and, when forming the ring structure, Rand Rmay form a ring structure together with a hetero atom other than the nitrogen atom represented by the "N" in addition to the nitrogen atom represented by the "N", "r" is an integer of 0 to 2.