| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a polyether-base copolymer capable of producing a polyether-base copolymer having a high molecular weight with a high yield at a low cost.SOLUTION: Provided is a method for producing a polyether-base copolymer having a process where cyclic ether (A) is acted with specified glycidyl ester (B) in the presence of boron trifluoride etherate (C), and ring opening polymerization is performed, in which the molar ratio of the glycidyl ester (B) to the cyclic ether (A) is 0.0001 to 0.14, and the molar ratio of the boron trifluoride etherate (C) to the cyclic ether (A) is 0.00001 to 0.0085. |
