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Application

2001112834/04, 2001-05-08

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Start date

2001-05-08

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Actual filing date

2001-05-08

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Published

2002-12-27

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Inventor

Borovnev L.M.Dedov A.S.Zakharov V.Ju.Kochetkova G.V.Kapustin I.M.Luk'Janov V.V.Puretskaja E.R.Tishina V.V.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Khimicheskij Kombinat Im. B.P.Konstantinova"

METHOD OF SYNTHESIS OF COPOLYMER OF TETRAFLUORO-ETHYLENE WITH HEXAFLUOROPROPYLENE Russian patent published in 2002 - IPC

Abstract RU 2195466 C1

FIELD: polymers, chemical technology. SUBSTANCE: invention relates to synthesis of copolymer of tetrafluoroethylene with hexafluoropropylene that is used as electric insulating material. Copolymer of tetrafluoroethylene with hexafluoropropylene is synthesized by copolymerization of indicated monomers in medium of liquefied hexafluoropropylene or octafluoro-cyclobutane as perfluorocarbon in the presence of perfluorodiacyl peroxide as polymerization initiating agent that is added to polymerization medium as 5-15 wt. % solution in polyfluorinated solvent using discharging mixture of indicated monomers under pressure maintaining by addition of monomers feeding mixture followed by separation of copolymer from reaction mass by distillation off of volatile components and product drying by the known procedures. Ozone-safety solvent taken among group including perfluoromethyl-cyclohexane and 1-hydro-4-chlorooctafluorobutane is used as polyfluorinated solvent. Invention allows to enhance thermal stability of copolymer, simplify technology of utilization of recurring solvent and monomers and enhance safety of process of synthesis of peroxide initiating agent. EFFECT: improved method of synthesis. 2 tbl, 6 ex

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RU 2 195 466 C1

Authors

Borovnev L.M.

Dedov A.S.

Zakharov V.Ju.

Kochetkova G.V.

Kapustin I.M.

Luk'Janov V.V.

Puretskaja E.R.

Tishina V.V.

Dates

2002-12-27—Published

2001-05-08—Filed

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