A conjugated diene polymer is produced by continuously polymerizing a conjugated diene monomer with a catalyst consisting essentially of components (1): a lanthanoid compound, (2): an aluminoxane and (3): a halogenated organometal compound, a halogenated metal compound or a halogenated organic compound in a hydrocarbon solvent containing 5-50% by weight of an aromatic hydrocarbon to obtain a conjugated diene polymer having a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of not more than 4.
共轭二烯聚合物的生产方法是:在含有 5-50%(重量)
芳香烃的烃类溶剂中,使共轭二烯单体与主要由以下组分组成的催化剂进行连续聚合:(1):
镧系化合物;(2):铝氧烷;(3):卤代有机
金属化合物、卤代
金属化合物或卤代有机化合物,以获得重量平均分子量(Mw)与数均分子量(Mn)之比(Mw/Mn)不大于 4 的共轭二烯聚合物。