| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently producing diene rubber with low linearity of the molecule.SOLUTION: A method for producing diene rubber, having 2.5 or less ratio (T/ML) of 5 wt.% toluene solution viscosity (T[cps]) and Mooney viscosity (ML) at 100°C, measured according to JIS-K6300, comprises a step of polymerizing a conjugated diene-based monomer by adding water, a transition metal catalyst and an organometallic promoter to a monomer liquid containing the conjugated diene-based monomer and an organic solvent, where the addition amount of the conjugated diene-based monomer is 100-1,400 mol with respect to 1 mmol of the transition metal catalyst, and the addition amount of the organometallic promoter is 1.55-2.5 mol with respect to 1 mol of the water. |
