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2 156 777

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Application

99101291/04, 1999-01-19

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Start date

1999-01-19

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Actual filing date

1999-01-19

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Published

2000-09-27

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Inventor

Loginova N.N.Kochkina L.G.Erokhova V.A.Dedov A.S.Zakharov V.Ju.Masljakov A.I.Nasonov Ju.B.Borovnev L.M.Tishina V.V.

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Holder

Aktsionernoe Obshchestvo Otkrytogo TipaOtkrytoe Aktsionernoe Obshchestvo Khimicheskij Kombinat Im. B.P. Konstantinova"

PROCESS FOR PRODUCTION TETRAFLUOROETHYLENE COPOLYMERS WITH 2-5 MOL % OF PERFLUOROPROPYL VINYL ETHER Russian patent published in 2000 - IPC

Abstract RU 2156777 C1

FIELD: polymer production. SUBSTANCE: copolymer of tetrafluoroethylene with 2-5 mol % of perfluoropropyl vinyl ether is prepared by copolymerization of monomers in fluorine-containing solvent (namely octafluorocyclobutane) in presence of radical-type fluorinated initiator. Process is performed by charging starting amount of monomers and then feeding replenishing this amount in the course of copolymerization. In starting charge, molar ratio tetrafluoroethylene/perfluoropropyl vinyl ether/octafluorocyclobutane amounts to (9-10):1:(73-93). Molar ratio of tetrafluoroethylene to perfluoropropyl vinyl ether in replenishing mixture is (115-120):1 until 75-80% of the total weight of replenishing monomers is consumed, after which reaction zone is replenished with tetrafluoroethylene only. EFFECT: increased productivity of process. 5 cl, 1 tbl, 14 ex

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RU 2 156 777 C1

Authors

Loginova N.N.

Kochkina L.G.

Erokhova V.A.

Dedov A.S.

Zakharov V.Ju.

Masljakov A.I.

Nasonov Ju.B.

Borovnev L.M.

Tishina V.V.

Dates

2000-09-27—Published

1999-01-19—Filed