Patent ID: 6340779
Filing Date: 2002-01-22
Classification: C04B,C08G

Abstract:
A method for producing fluorine-containing oxyalkylene compounds represented by the formula (4), which comprises ring opening polymerization of at least one cyclic ether represented by the formula (3) in the presence of an acid catalyst and a fluorine-containing hydroxyl compound represented by the formula (2):Rfâ€”Q2â€”OHâ€ƒâ€ƒ(2) â€ƒRfâ€”Q2â€”Oâ€”(A2â€”O)kâ€”Hâ€ƒâ€ƒ(4)whereinRf is a C1-22 polyfluoroaliphatic hydrocarbon group which may contain ethereal oxygen atoms or thioethereal sulfur atoms, Q2 is a C3-5 linear or branched alkylene group, k is an integer of from 1 to 100, and A2 is a C2-4 linear alkylene group or a group having at least one hydrogen atom of said alkylene group substituted by a hydrocarbon group which may contain ethereal oxygen atoms.