| 摘要 |
PURPOSE:To obtain titled polymer useful as high-pressure additives, lubricant oils, etc., by deriving from perfluoroethersulfonic acid fluoride. CONSTITUTION:The objective polymer of formula I (R1-R4 are each fluorine or perfluoroalkyl; n=1-5; m=0-10) can be obtained by reducing, in the presence of reducing metal or metallic compound and acid, perfluoroethersulfonic acid polymer of formula II (R1-R4, n and m are the same as those in the formula I , respectively).
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