Patent ID: 6469217
Filing Date: 2002-10-22
Classification: B01J,C08G

Abstract:
A process for preparing a perfluoropolyether, comprising polymerizing hexafluoropropylene oxide in the presence of a polymerization initiator-containing solution which comprises a polymerization initiator (Bâ€²) represented by the following formula (IV) and an aprotic polar solvent;(FOC)xâ€”Rf2â€”(CF2OCs)yâ€ƒâ€ƒ(IV) wherein Rf2 is perfluoroalkylene having 1 to 4 carbon atoms or perfluoroalkylene having 2 to 10 carbon atoms and an ether bond, and x and y are numbers satisfying the conditions of x+y=2 and 0.1