A process for the preparation of polyethers is disclosed in which an oxetane monomer, or a mixture of an oxetane monomer and an oxolane monomer, and a carboxylic acid anhydride are contacted with a bleaching earth catalyst. The process yields ester-terminated polyethers which may be saponified to obtain hydroxy-terminated polyether polyols.
本发明公开了一种制备聚醚的工艺,在该工艺中,氧杂
环丁烷单体或氧杂
环丁烷单体和氧杂
环戊烷单体的混合物以及
羧酸酐与漂
白土催化剂接触。该工艺可得到酯封端聚醚,将其皂化可得到羟基封端聚醚多元醇。