申请人:Miyanaga Seiichi
公开号:US20050004344A1
公开(公告)日:2005-01-06
The present invention provides a process for efficiently obtaining polyethers having its high degree of polymerization by easily polymerizing substituted epoxides which could hardly or could not be made so far to provide a high degree of polymerization. That is, a polyether is obtained by a process which comprises ring-opening-polymerizing at least one substituted epoxide, except for propylene oxide and epihalohydrin, in the presence of a rare earth metal compound represented by the formula (I) and a reducing compound:
Wherein M represents a rare earth element selected from Sc, Y and lanthanide, and L
1
, L
2
and L
3
are same as or different from each other and each of them represents an oxygen-binding ligand.
本发明提供了一种高效获得高聚度聚醚的方法,通过简单地聚合很难或迄今为止不能得到高聚度的取代环氧化物来提供高聚度聚醚。也就是说,通过在稀土金属化合物(I)和还原化合物的存在下,开环聚合至少一种取代环氧化物(丙烯酸丙烯酯和环氧氯丙烷除外)来获得聚醚:其中,M代表从Sc、Y和镧系元素中选择的稀土元素,L1、L2和L3相同或不同,每个代表一个氧结合配体。