Novel perfluorinated polyethers and process for their preparation

摘要

Perfluorinated polyethers having the formula RfO-(CF2CF2O)n-R'f wherein n is an integer of 1-11 and each of Rf and R'f is a perfluorinated C1-C5-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.