FIELD: production of thermal resistant oils, lubricants, plasticizers and modifying agents. SUBSTANCE: method is carried out by interaction of polyether (having structure units with common formula (CH2-CF2-CF2O)a where a is 2-200) with 2,2,3,3-tetrafluoroxetone being prepared by polymerization and with gaseous fluorine. EFFECT: improved efficiency. 3 cl
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