发明授权
- 专利标题： Process for the preparation of polyether thioethers
- 专利标题（中）： 聚乙二醇的制备方法
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申请号： US3755462D申请日： 1971-09-01
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公开(公告)号： US3755462A公开(公告)日： 1973-08-28
- 发明人: DEGENER E
- 申请人： BAYER AG
- 专利权人： Bayer Ag
- 当前专利权人： Bayer Ag
- 优先权： DE2043899 1970-09-04
- 主分类号： C08G65/34
- IPC分类号： C08G65/34 ; C08G75/04 ; C08G75/12 ; C08L21/00 ; C07C149/14
摘要：
THIS INVENTION RELATES TO AN IMPROVED PROCESS FOR THE PREPARATION OF POLYETHER THIOETHERS WHICH ARE SUITABLE FOR USE AS PLASTICIZERS. IT HAS BEEN FOUND THAT THE CONDENSATION OF THIOGLYCOL WHICH IS CATALYZED WITH PHOSPHOROUS ACID CAN BE SUBSTANTIALLY ACCELERATED BY ALSO ADDING A SMALL QUANTITY OF A SALT OF METAL FROM THE GROUP II, II-A, VIII-A OF THE PERIODIC SYSTEM AND AN ORGANIC SULPHONIC ACID.
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