Cotelomers and a process for making them

Details Cotelomers and a process for making them Cotelomers and a process for making them

1994-10-27

1995-08-29

Evans, Joseph E.

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

Organic compounds

Halogen containing

20415811, 570137, 570139, C07C 17269, C07C 17273, C07C 19075

Patent

active

054462142

ABSTRACT:
A cotelomer of --CH.sub.2 CF.sub.2 -- (VDF) units and CF.sub.2 CF(CF.sub.3)-- (HFP) units characterized in that the HEP units comprise at least 33% of all VDF and HFP units in the cotelomer combined. Also claimed is a process for preparing a cotelomer in the liquid state comprising reacting (A) a bromine geminal telogen having the general formula RC(R')Br.sub.2 wherein R and R' are selected from the group consisting of F and perfluorinated alkyl radicals having 1 to 8 carbon atoms; (B) 1,1-difluoroethene, and (C) hexafluoropropene, the molar ratio of said components (A):(B):(C) being x:1:1 to x:1:5, in which x is 1 to 5.

REFERENCES:
patent: 2856440 (1958-10-01), Wolf
patent: 2875253 (1959-02-01), Barnhart
patent: 4501869 (1985-02-01), Tatemoto
patent: 4745165 (1988-06-01), Arcella
patent: 4810765 (1989-03-01), Modena
patent: 5110973 (1992-05-01), Caporiccio
patent: 5196614 (1993-03-01), Caporiccio
J. Fluorine Chem 40 (2-3), 261-282, 1988; G. C. Apsey, et al. Model Compounds Related to Hexafluoropropene-Vinylidene.
J. Am. Chem. Soc., Thermal Synthesis of Telomers of Fluorinated Olefins by Hauptschein, Braid and Fainberg (1957), vol. 80.
Polymer, 1986, vo. 27, Jun. pp. 905-909, Glass Transition Temperatures of copolymer and Terpolymer Fluoroelastomers.
J. A. Chem. Soc., Thermal Synthesis of Telomers of Fluorinated Olefins. I. Perfluoropropene by Hauptschein (1957), vol. 79.

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