发明名称 |
Preparation of esters of poly-(tetramethylene ether) glycol |
摘要 |
Esters of poly(tetramethylene ether) glycol are prepared by polymerizing tetrahydrofuran in a reaction mixture which contains, in addition to the tetrahydrofuran, and acylium ion precursor such as acetic anhydride, a polymeric catalyst which contains sulfonic acid groups and, optionally, a carboxylic acid such as acetic acid.
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申请公布号 |
US4163115(A) |
申请公布日期 |
1979.07.31 |
申请号 |
US19780869272 |
申请日期 |
1978.01.13 |
申请人 |
DU PONT DE NEMOURS, E I & |
发明人 |
GILBERT, WALTER W;HEINSOHN, GEORGE E;PRUCKMAYR, GERFRIED;ROBINSON, IVAN M |
分类号 |
C08G65/20;(IPC1-7):C07C67/24 |
主分类号 |
C08G65/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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