申请人:KANEKA CORPORATION
公开号:EP1090930A1
公开(公告)日:2001-04-11
This invention is related to a polymerization method
wherein an atom transfer radical polymerization of a vinyl monomer is carried out under at least one condition selected from the group consisting of the following (1), (2), (3) and (4):
(1) in a substantially anhydrous system;
(2) in the presence of a nitrile compound;
(3) addition, to the system, of a ligand to the polymerization catalyst to thereby initiate the polymerization;
(4) varying a polymerization catalyst activity during polymerization to thereby control the rate of polymerization.
This invention provides a method which allows the terminal halogen atom to remain at a high rate in atom transfer radical polymerization, solve such problems as the difficulty in polymerization rate control as caused by catalyst precipitation and wide variation in catalyst amount, provide a simple and safe method of polymerization initiation as well as a method of controlling the rate of polymerization, and indicate a method of improving the polymerization procedure.
本发明涉及一种聚合方法
其中,乙烯基单体的原子转移自由基聚合在至少一种选自以下(1)、(2)、(3)和(4)组成的条件下进行:
(1) 在基本上无水的体系中;
(2) 在有腈化合物存在的情况下
(3) 在体系中向聚合催化剂添加配位体,从而启动聚合反应;
(4) 在聚合过程中改变聚合催化剂的活性,从而控制聚合速率。
本发明提供了一种可使末端卤原子在原子转移自由基聚合中保持较高聚合速率的方法,解决了因催化剂沉淀和催化剂用量变化大而导致聚合速率难以控制等问题,提供了一种简单安全的聚合引发方法和聚合速率控制方法,并指出了一种改进聚合程序的方法。