发明名称 |
METHOD FOR PREPARING A COMPOSITION COMPRISING PERFLUOROPOLYETHER HAVING A HYDROXYL GROUP AT ONE TERMINAL |
摘要 |
An object of the present invention is to provide a method for efficiently and highly selectively preparing a composition comprising perfluoropolyether having a hydroxyl group at one terminal at a higher ratio. The present invention provides a method for increasing a ratio of perfluoropolyether having a hydroxyl group at one terminal, relative to a total amount of the perfluoropolyether having a hydroxyl group at one terminal and perfluoropolyether having hydroxyl groups at both terminals in a composition comprising these perfluoropolyethers, wherein the method comprises a step of subjecting the composition to chromatography in which a moving phase is supercritical or subcritical state carbon dioxide of the specific temperature and the specific pressure, and a stationary phase is silica gel to thereby collect a fraction containing the perfluoropolyether having a hydroxyl group at one terminal at a higher ratio. Further, present invention provides for increasing a ratio of perfluoropolyether having a hydroxyl group at one terminal, relative to a total amount of the perfluoropolyether having a hydroxyl group at one terminal, perfluoropolyether having hydroxyl groups at both terminals and perfluoropolyether having no hydroxyl group at any terminal perfluoropolyether, in a composition comprising these perfluoropolyethers, wherein the method comprises a step of subjecting the composition to chromatography in which a moving phase is supercritical or subcritical state carbon dioxide of the specific temperature and the specific pressure, and a stationary phase is silica gel to thereby collect a fraction containing the perfluoropolyether having a hydroxyl group at one terminal at a higher ratio. |
申请公布号 |
EP2930201(A1) |
申请公布日期 |
2015.10.14 |
申请号 |
EP20150162845 |
申请日期 |
2015.04.08 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD |
发明人 |
YAMANE, YUJI;MATSUDA, TAKASHI;KOIKE, NORIYUKI |
分类号 |
C08G65/00;C08G65/30;C08G65/46 |
主分类号 |
C08G65/00 |
代理机构 |
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代理人 |
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地址 |
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