Patents Represented by Law Firm Brooks. W. W.
  • Novel perfluorinated polyethers and process for their preparation
    Patent number: 5076949
    Abstract: Perfluorinated polyethers having the formulaR.sub.f O--(CF.sub.2 CF.sub.2 O).sub.n --R'.sub.fwherein n is an integer of 1-11 and each of R.sub.f and R'.sub.f is a perfluorinated C.sub.1 -C.sub.5 -alkyl radical, dimers of such polyethers and carbon to carbon intramolecularly coupled cyclic derivatives of such polyethers are produced by direct fluorination of the polyethers in an inert solvent. Compositions of the perfluorinated polyethers and their derivatives are useful as functional fluids.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: December 31, 1991
    Assignee: Monsanto Company
    Inventors: Dennis J. Kalota, John S. McConaghy, Jr., Paul W. Foerst, Paul H. Liu, Frank R. Feher, Jr.