FLUOROPOLYMER AND METHOD FOR ITS PRODUCTION Russian patent published in 2024 - IPC C08F16/24 C09D129/10 

FIELD: fluoropolymers.

SUBSTANCE: invention relates to methods of producing a fluoropolymer. Disclosed is a method of producing a fluoropolymer, comprising polymerisation of monomer (I) of general formula CX₂=CY-CF₂-O-Rf-A, where X and Y are independently H, F, CH₃ or CF₃, and at least one of X and Y is F; Rf is a fluorine-containing alkylene group having 1–6 carbon atoms, or a fluorine-containing alkylene group having 2–6 carbon atoms and having an ether bond; and A is -COOM, -SO₃M or -OSO₃M, where M is -H, metal atom, -NR⁷₄, imidazolium optionally having a substitute which is an alkyl group having 1–8 carbon atoms, pyridinium optionally having a substitute which is an alkyl group having 1–8 carbon atoms, or phosphonium, optionally having a substitute, which is an alkyl group having 1–8 carbon atoms, and R⁷ is H or an alkyl group; wherein polymerisation is carried out in an aqueous medium, and oxygen concentration in the polymerization reaction system is maintained at level of 500 volume parts per million or less. Invention also discloses the obtained fluoropolymer, an aqueous polymer solution and a coating composition containing a fluoropolymer or an aqueous solution thereof.

EFFECT: disclosed method enables to obtain a fluoropolymer with high molecular weight, and the obtained fluoropolymer is capable of forming a uniform coating film having the desired thickness.

19 cl, 1 tbl, 3 ex