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2 348 649

(13)

(51)

IPC

C08F2/24(2006-01-01)

C08F2/34(2006-01-01)

C08F214/26(2006-01-01)

C08F4/40(2006-01-01)

C08F2/22(2006-01-01)

C08F2/28(2006-01-01)

(21) (22)

Application

2007147725/04, 2007-12-20

(24)

Start date

2007-12-20

(22)

Actual filing date

2007-12-20

(45)

Published

2009-03-10

(72)

Inventor

Ivanchev Sergej StepanovichMisin Vladimir StefanovichPavljuchenko Valerij NikolaevichPrimachenko Oleg NikolaevichSokolov Lev FedorovichTjul'Mankov Valerij PetrovichKhajkin Saul Jankelevich

(73)

Holder

Institut Kataliza Imeni G.K. Boreskova Sibirskogo Otdelenija Rossijskoj Akademii Nauk Gosudarstvennogo Uchrezhdenija)

METHOD OF OBTAINING PERFLUORATED COPOLYMER CONTAINING FUNCTIONAL GROUPS Russian patent published in 2009 - IPC C08F2/24 C08F2/34 C08F214/26 C08F4/40 C08F2/22 C08F2/28

Abstract RU 2348649 C1

FIELD: chemistry.

SUBSTANCE: invention claims method of obtaining perfluorated copolymer containing functional groups, involving emulsion copolymerisation of tetrafluoroethylene and perfluoro-2-fluorosulfonylethoxypropylvinyl ether in the presence of radical initiation agent and perfluorocarboxylic acid salt as emulsion stabiliser. Method involves preliminary stage of perfluoro-2-fluorosulfonylethoxypropylvinyl ether emulsification in water medium. Emulsion copolymerisation of tetrafluoroethylene and perfluoro-2-fluorosulfonylethoxypropylvinyl ether is performed at constant tetrafluoroethylene pressure of 0.48-0.52 MPa and stopped when perfluoro-2-fluorosulfonylethoxypropylvinyl ether conversion reaches 49-77%, and preliminary stage of perfluoro-2-fluorosulfonylethoxypropylvinyl ether emulsification in water medium involves rotor-stator type homogenisation agent as disperser, at rotor rotation rate of 8000-12000 rpm, using perfluorocarboxylic acid ammonium salt C_nF_2n+1COONH₄ for emulsion stabilisation, where n=7-9. Emulsification is performed in inert gas medium.

EFFECT: efficient method of obtaining perfluorated copolymer.

6 cl, 5 ex

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RU 2 348 649 C1

Authors

Ivanchev Sergej Stepanovich

Misin Vladimir Stefanovich

Pavljuchenko Valerij Nikolaevich

Primachenko Oleg Nikolaevich

Sokolov Lev Fedorovich

Tjul'Mankov Valerij Petrovich

Khajkin Saul Jankelevich

Dates

2009-03-10—Published

2007-12-20—Filed