发明授权
US5000830A Process for the production of perfluoropolyethers substantially
constituted by perfluorooxyethylene and perfluorooxypropylene units
失效
用于生产基本上由全氟氧乙烯和全氟氧化丙烯单元组成的全氟聚醚的方法
- 专利标题: Process for the production of perfluoropolyethers substantially constituted by perfluorooxyethylene and perfluorooxypropylene units
- 专利标题(中): 用于生产基本上由全氟氧乙烯和全氟氧化丙烯单元组成的全氟聚醚的方法
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申请号: US352987申请日: 1989-05-17
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公开(公告)号: US5000830A公开(公告)日: 1991-03-19
- 发明人: Giuseppe Marchionni , Ugo De Patto
- 申请人: Giuseppe Marchionni , Ugo De Patto
- 申请人地址: ITX Milan
- 专利权人: Ausimont S.r.l.
- 当前专利权人: Ausimont S.r.l.
- 当前专利权人地址: ITX Milan
- 优先权: ITX20649A/88 19880520
- 主分类号: C08G65/48
- IPC分类号: C08G65/48 ; C08G65/00 ; C08G65/32 ; C08G65/323 ; C08G67/00
摘要:
Improved process for producing perfluoropolyethers prevailingly constituted by repeating units--CF.sub.2 CF.sub.2 O--and ##STR1## with perfluoroalkyl terminal groups, wiith a mutual ratio of the above C.sub.3 /C.sub.2 units comprised within the range of from 0.2 to 6, endowed with an optimum combination of chemical-physical properties, prepared by means of a process of photo-oxidation of C.sub.3 F.sub.6 +C.sub.2 F.sub.4, under controlled conditions.
公开/授权文献
- US4408786A Ferrule, coupling and coupling process 公开/授权日:1983-10-11
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