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    • 70. 发明申请
    • FLUORINATED POLYETHERS AND THEIR PREPARATION
    • 氟化聚醚及其制备
    • WO1994019391A1
    • 1994-09-01
    • PCT/GB1994000381
    • 1994-02-25
    • BNFL FLUOROCHEMICALS LTD.CHAMBERS, Richard, DickinsonJOEL, Andrew, Keith
    • BNFL FLUOROCHEMICALS LTD.
    • C08G65/00
    • C08G65/3236C07C41/22C07C43/126
    • A process for the preparation of a perfluoropolyether having general formula (1) as defined hereinbefore, which process includes the direct fluorination with elemental fluorine of a polyether having general formula (2) as defined hereinbefore, wherein the fluorination is carried out in the presence of a solvent which is an ether having at least one substituent RF, wherein RF is a fluorinated hydrocarbon group. The said solvent ether is preferably a fluorinated volatile ether. The said solvent ether preferably has at least two groups RF which may be the same or different groups. Each group RF preferably has from two to four carbon atoms and at least two fluorine atoms. The said solvent ether may be an alicyclic ether having from 3 to 5 carbon atoms in its alicyclic ring. The intermediate polyether of formula (2) may be prepared by a process in which an appropriate straight-chained or cyclic polyether is reacted with an appropriate fluoroalkene in the presence of a sensitising medium and ultra-violet radiation is applied to energise the medium and promote multiple fluorination.
    • 一种制备具有上述通式(1)的全氟聚醚的方法,该方法包括用如上定义的通式(2)的聚醚的元素氟直接氟化,其中氟化在 作为具有至少一个取代基RF的醚的溶剂,其中RF是氟化烃基。 所述溶剂醚优选为氟化挥发性醚。 所述溶剂醚优选具有至少两个可以相同或不同基团的基团。 每组RF优选具有2至4个碳原子和至少2个氟原子。 所述溶剂醚可以是其脂环中具有3至5个碳原子的脂环醚。 式(2)的中间聚醚可以通过一种方法制备,其中适当的直链或环状聚醚在敏化介质存在下与合适的氟代烯烃反应,并且使用紫外线辐射来激发介质并促进 多次氟化。