Patent ID: 9745394
Date: 2017-08-29
CPC Classifications: C07F,C08C,C08F

Claim:
1. A method for producing a conjugated diene polymer, which comprises subjecting a monomer containing at least a conjugated diene to living radical polymerization using a polymerization initiator comprising a halogenocyclopentadienyl triorganophosphine η 2 -olefin ruthenium complex represented by formula (6) and an organic halide wherein in formula (6) R wherein in formula (7) Y wherein in formula (8) Y wherein in formula (9) Y wherein the conjugated diene polymer comprises at least a conjugated diene monomer unit, wherein the conjugated diene polymer has a number-average molecular weight (Mn) in terms of polystyrene of 1,000 to 1,000,000, a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of lower than 2.0 and the conjugated diene polymer bears a halogen atom at a terminal of the polymer chain, and wherein 10% or higher of all conjugated diene polymer chains have a halogen atom at its terminal.