| 摘要 |
The present invention relates to a process for manufacturing copolyether ester polyol having a low oligomeric cyclic ether content, for example, less than about 2.0% by weight, from feedstock comprising polytetramethylene ether glycol having a low number average molecular weight, for example, 350 g/mol or less, and a high oligomeric cyclic ether content, for example, about 4.0% by weight or greater. |
