发明名称 |
Reduction of molecular weight of poly(tetramethylene ether) glycol |
摘要 |
A process for reducing the molecular weight of polytetramethylene ether glycol without significant conversion of polytetramethylene ether glycol to tetrahydrofuran monomer is disclosed. The process involves a two-step procedure. The first step comprises reacting polytetramethylene ether glycol with a perfluoroalkyl carboxylic acid to form a perfluoroalkyl ester of polytetramethylene ether glycol. That ester is, in the second step, converted back to polytetramethylene ether glycol of reduced molecular weight by hydrolysis or alcoholysis.
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申请公布号 |
USRE35360(E) |
申请公布日期 |
1996.10.22 |
申请号 |
US19940263842 |
申请日期 |
1994.06.22 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
DORAI, SURIYANARAYAN |
分类号 |
C08G65/32;C07C43/13;C08G65/332;(IPC1-7):C07C43/11 |
主分类号 |
C08G65/32 |
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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