| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a bifunctional hexafluoropropene oxide (hereinafter referred to as HFPO) polymer having a low monofunctional HFPO polymer content. SOLUTION: This method for producing the hexafluoropropene oxide polymer is characterized by mixing one or more bifunctional perfluorocarbonyl compounds represented by general formula (1) (Rf<1> to Rf<4> are each F or CF3 , provided that Rf<1> and Rf<2> , or Rf<3> and Rf<4> are mutually different atoms or groups) with a metal fluoride in an aprotonic polar solvent to prepare the polymerization initiator solution, and supplying hexafluoropropene oxide to the obtained polymerization initiator solution. Thereby, an alcoholate is quantitatively produced in the alkali metal fluoride and the aprotonic polar solvent, and the bifunctional perfluorocarbonyl compound available at a relatively low price and not containing a monofunctional impurity is used as the initiator, whereby the highly pure bifunctional HFPO polymer having a low monofunctional HFPO polymer content and a low molecule component content can be produced at a low cost.
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