Polymerization of hexafluoropropene oxide

Details Polymerization of hexafluoropropene oxide Polymerization of hexafluoropropene oxide

1999-04-01

2000-10-03

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From fluorine-containing reactant

528401, 528488, 528491, 560180, 560184, C08G 6522

Patent

active

061275174

ABSTRACT:
Before hexafluoropropene oxide (HFPO) is polymerized in a polymerization initiator solution of a polymerization initiator of the formula: CSOCF.sub.2 --Rf--CF.sub.2 OCs wherein Rf is a perfluoroalkylene group which may have an ether bond in an aprotic polar solvent, the initiator solution is treated by adding a perfluoroolefin thereto at a sufficient temperature for the removal of protonic substances, cesium fluoride and hydrogen fluoride. This simple treatment restrains chain transfer reaction, and the process is successful in producing a difunctional HFPO polymer having a high degree of polymerization while suppressing formation of a monofunctional HFPO polymer.

REFERENCES:
patent: 3660315 (1972-05-01), Hill et al.
patent: 4356291 (1982-10-01), Darling
patent: 5919973 (1999-07-01), Matsuda et al.
Hill, James T., J. Macromol. Sci.-Chem., A8(3), pp. 499-520 (1974).
Patent Abstracts of Japan, 07149889.
Patent Abstracts of Japan, 07165832.
Patent Abstracts of Japan, 09286853.
Patent Abstracts of Japan, 10147639.

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