Polyethercyclicpolyols are prepared by thermally condensing a polyol having at least three hydroxyl groups of which at least two of the hydroxyl groups are vicinal, precursors of the polyol, cyclic derivatives of the polyol, or mixtures thereof, and controlling process conditions to avoid substantial undesirable degeneration.
聚醚环多元醇是通过热缩具有至少三个羟基(其中至少有两个羟基是沧海基)的多元醇、多元醇的前体、多元醇的环状衍
生物或它们的混合物,并控制工艺条件以避免发生严重的不良变质而制备的。