| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel branched conjugated diene copolymer or a novel hydrogenated branched conjugated diene copolymer useful for improvement in processability or the like as a component of a tire rubber composition, a tire rubber composition comprising the copolymer, and a pneumatic tire made using the tire rubber composition.SOLUTION: There is provided a branched conjugated diene copolymer prepared by copolymerizing a monomer component containing a branched conjugated diene compound (1) represented by general formula (1) where Ris an aliphatic hydrocarbon having 6 to 11 carbon atoms, and an aromatic vinyl compound (2) represented by general formula (2) where Ris an aromatic hydrocarbon group having 6 to 10 carbon atoms, wherein a copolymerization ratio of the aromatic vinyl compound (2) is 80 wt.% or more and 99 wt.% or less. |
