Perfluoropolyether primary bromides and iodides
AssigneeE. I. Du Pont de Nemours and Company
InventorsJon L. Howell, Erik W. Perez, Alfred Waterfeld, Chadron Mark Friesen, Joseph Stuart Thrasher, Ireneusz Nowak
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Abstract
A perfluoropolyether and a composition comprising the perfluoropolyether are provided in which the perfluoropolyether comprises at least one bromine or iodine atom at the primary position of the perfluoropolyether. Also provided is a process for producing the composition in which the process comprises contacting a perfluoropolyether acid fluoride moiety with a metal bromide or metal iodide or a suitable polyether secondary iodide under a condition sufficient to effect the production of a perfluoropolyether comprising at least one bromine or iodine at the primary position.
Claims12
A composition comprising a perfluoropolyether, which has the formula selected from the group consisting of F(C3F6O)zCF(CF3)CF2X, XCF2CF(CF3)O(C3F6O)pRf2O(C3F6O)nCF(CF3)CF2X, XCF2CF2O(C3F6O)xCF(CF3)CF2X, (Rf1)(Rf1)CFO(C3F6O)xCF(CF3)CF2X, and combinations of two or more thereof wherein X is I or Br, x is a number from 2 to about 100, z is a number from 5 to about 100, p is a number from 2 to about 50, n is a number from 2 to about 50, each Rf1 is independently a monovalent C1 to C20 branched or linear fluoroalkane, and Rf2 is a divalent C1 to C20 branched or linear fluoroalkane.
Dependencies are inferred from the claim text.