| 发明名称 |
Method for preparing copolyether glycols |
| 摘要 |
Copolyether glycols are prepared by copolymerizing alkylene oxides or cyclic acetals and tetrahydrofuran, using (1) A POLYMERIC CATALYST WHICH CONTAINS SULFONIC ACID GROUPS; AND (2) A CHAIN TERMINATOR WHICH IS WATER OR AN ALKANEDIOL.
|
| 申请公布号 |
US4139567(A) |
申请公布日期 |
1979.02.13 |
| 申请号 |
US19780868112 |
申请日期 |
1978.01.09 |
| 申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
PRUCKMAYR, GERFRIED |
| 分类号 |
B01J31/06;C07C41/02;C08G18/48;C08G65/20;C08G65/26;(IPC1-7):C07C41/02 |
主分类号 |
B01J31/06 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
