发明授权
- 专利标题： High purity polyether polyols
- 专利标题（中）： 高纯度聚醚多元醇
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申请号： US359014申请日： 1989-05-30
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公开(公告)号： US4946939A公开(公告)日： 1990-08-07
- 发明人: Frank H. Murphy , Robert T. Jernigan , Jeff G. Grierson , Wayne G. Wessels
- 申请人： Frank H. Murphy , Robert T. Jernigan , Jeff G. Grierson , Wayne G. Wessels
- 申请人地址： MI Midland
- 专利权人： The Dow Chemical Company
- 当前专利权人： The Dow Chemical Company
- 当前专利权人地址： MI Midland
- 主分类号： A23L33/20
- IPC分类号： A23L33/20 ; C08G65/02 ; C08G65/28 ; C08G65/30 ; C08L71/02
摘要：
High purity polyether polyol compositions such as polyethylene glycol are made having small amounts of impurities such as oligomers of active hydrogen compounds with alkylene oxides. The high purity is achieved by subjecting the polyether polyol compositions to membrane filtration to get less than about 10 parts per million of the low molecular weight oligomers.
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