发明授权
US5284980A Block copolyethers via oxonium coupling of poly(tetramethylene ether)
glycols
失效
通过聚(四亚甲基醚)二醇的氧杂偶联来嵌段共聚醚
- 专利标题: Block copolyethers via oxonium coupling of poly(tetramethylene ether) glycols
- 专利标题(中): 通过聚(四亚甲基醚)二醇的氧杂偶联来嵌段共聚醚
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申请号: US965599申请日: 1992-10-26
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公开(公告)号: US5284980A公开(公告)日: 1994-02-08
- 发明人: Gerfried Pruckmayr , Robert B. Osborne
- 申请人: Gerfried Pruckmayr , Robert B. Osborne
- 申请人地址: DE Wilmington
- 专利权人: E. I. du Pont de Nemours and Company
- 当前专利权人: E. I. du Pont de Nemours and Company
- 当前专利权人地址: DE Wilmington
- 主分类号: C08G18/66
- IPC分类号: C08G18/66 ; C08G18/65 ; C08G65/20 ; C08G65/28 ; C08G65/32 ; C08G65/331 ; C08G65/34 ; C07C41/09
摘要:
Treatment of poly(tetramethylene ether) glycols with acid catalysts at elevated temperatures leads to a chain coupling with rapid increase in molecular weight. Various alcohols including diols and triols can be incorporated into poly(tetramethylene ether) glycol backbone with modified properties and performance.
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