申请人:Bridgestone Corporation
                            
                            
                                公开号:US20150031845A1
                            
                            
                                公开(公告)日:2015-01-29
                            
                            A method for producing a polydiene, the method comprising the steps of (i) forming an active catalyst by combining a lanthanide-containing compound, an alkylating agent, and a halogen source in the substantial absence of an organosulfide; and (ii) polymerizing conjugated diene monomer in the presence of the active catalyst and an organosulfide.