申请人:Dow Global Technologies LLC
公开号:US20200354383A1
公开(公告)日:2020-11-12
A method of producing a polyether polyol includes reacting a low molecular weight initiator with ethylene oxide in the presence of a polymerization catalyst, and the low molecular weight initiator has a nominal hydroxyl functionality at least 2. The polymerization catalyst is a Lewis acid catalyst having the general formula M(R
1
)
1
(R
2
)
1
(R
3
)
1
(R
4
)0 or 1, whereas M is boron, aluminum, indium, bismuth or erbium, R
1
, R
2
, R
3
, and R
4
are each independent, R
1
includes a fluoroalkyl-substituted phenyl group, R
2
incudes a fluoroalkyl-substituted phenyl group or a fluoro/chloro-substituted phenyl group, R
3
includes a fluoroalkyl-substituted phenyl group or a fluoro/chloro-substituted phenyl group, and optional R
4
includes a functional group or functional polymer group, R
1
being different from at least one of R
2
and R
3
.
一种生产聚醚多元醇的方法包括在聚合催化剂存在下,将低分子量启始剂与环氧乙烷反应,其中低分子量启始剂的名义羟基官能度至少为2。聚合催化剂是具有一般式M(R1)1(R2)1(R3)1(R4)0或1的路易斯酸催化剂,其中M为硼、铝、铟、铋或铒,R1、R2、R3和R4各自独立,R1包括氟烷基取代的苯基,R2包括氟烷基取代的苯基或氟/氯取代的苯基,R3包括氟烷基取代的苯基或氟/氯取代的苯基,可选的R4包括功能基或功能聚合物基,R1与至少一个R2和R3不同。