Process for preparing perfluoropolyethers

Details Process for preparing perfluoropolyethers Process for preparing perfluoropolyethers

1994-11-16

1996-01-30

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568614, C07C 4330

Patent

active

054881811

ABSTRACT:
Process for preparing peroxidic perfluoropolyethers by oxidation of tetrafluoroethylene with oxygen, in liquid phase comprising a solvent and in the presence of a chemical initiator, at a pressure between 2 and 15 absolute atm and operating with a molar ratio of the tetrafluoroethylene to the chemical initiator higher than 35. The process allows to increase the molecular weight of the perfluoropolyethers at the same content of peroxidic oxygen.

REFERENCES:
patent: 3665041 (1972-05-01), Sianesi et al.
patent: 3683027 (1972-08-01), Sianesi et al.
patent: 3847978 (1974-11-01), Sianesi et al.
patent: 4085137 (1978-04-01), Mitsch et al.
patent: 5144092 (1992-09-01), Marraccini et al.
patent: 5220076 (1993-06-01), Marraccini et al.

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