| 摘要 |
PROBLEM TO BE SOLVED: To provide novel polybutadiene which has improved cold flow property even when being a linear polybutadiene, and contributes to balance improvement of abrasion resistance, processability and low loss property and tensile property when used for a rubber composition.SOLUTION: There is provided a polybutadiene having a cold flow speed (mg/min.) at temperature of 50°C of 17 or less and a ratio between 5 wt.% toluene solution viscosity (Tcp [cps]) and a Mooney viscosity (ML) at 100°C measured according to JIS-K6300, (Tcp/ML) of 1.8 or more. |
