| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a copolymer of cyclic and non-cyclic conjugated diene monomers by using a catalyst composition of a transition metal and a lanthanide metal and a rubber composition containing the copolymer.SOLUTION: There is provided a manufacturing method of a copolymer of non-cyclic conjugated diene and cyclic conjugated diene by using a polymer catalyst system containing a transition metal compound or a lanthanide metal compound, an alkylating agent and inorganic halide alcoholate. There is provided a rubber composition and a tire containing the copolymer. There is provided a manufacturing method of copolymer containing at least 90% of non-cyclic conjugated diene monomer and having a number average molecular weight of 40,000 to 300,000 and a cis biding amount of at least 92%.SELECTED DRAWING: None |
