FIELD: lubricants. SUBSTANCE: invention provides new fluorinated hydrocarbons containing in molecule at least oxygen atom and having general formula R1R3C=CR2R4, wherein R1, R2, and R3 are partially or completely fluorinated linear or branched C1-C30-alkyls, R4 is linear or branched C1-C30-alkyl or C2-C100-polyether group. Preparation methods for such compounds are also provided. EFFECT: increased stability and compatibility with hydrogen-containing halogenated hydrocarbons. 17 cl, 4 tbl, 57 ex
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