Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1986-01-06
1989-02-28
Evans, J. E.
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570125, C07C 1726, C07C 1908
Patent
active
048087602
ABSTRACT:
Telomers are prepared by reacting chlorotrifluoroethylene with 1,2-dibromo-2-chlorotrifluoroethane (CBrClFCF.sub.2 Br) in the presence of a redox catalyst system comprising a metal halide selected from the group consisting of FeCl.sub.3, FeBr.sub.3, CuBr.sub.2, CuCl.sub.2, TiCl.sub.4, VCl.sub.3, and NiCl.sub.2, and a reducing agent selected from the group consisting of Fe, Ni, Cu, Ti, V and benzoin. The preferred catalyst system is ferric chloride and nickel. The telomers of this invention have the structural formula ##STR1## where n is in the range of 1 to 10, and are useful for preparing non-flammable hydraulic fluids.
REFERENCES:
patent: 2788375 (1957-04-01), Ehrenfield
patent: 4740640 (1980-04-01), Boutevin et al.
Boutevin et al, Telomerization by Redox Catalysis-Part V, European Polymer Journal, vol. 12, pp. 1-18(1976)--Translation.
Dannels Bobby F.
Fifolt Michael J.
Tang David Y.
Evans J. E.
Gosz Willaim G.
Mudd James F.
Occidental Chemical Corporation
Tao James F.
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