| abstract |
Fluoropolyethers having functional groups, comprising sequences of statistically distributed perfluoropolyoxyalkylene units selected from: <CHEM> and having one of the following formulae: <CHEM> (II) T min -O(CF2CF2O)p(CF2O)sCRR min -Y <CHEM> wherein T, T min , T sec = a perhaloalkyl group containing from 1 to 3 carbon atoms and one or two atoms selected from Cl, Br and I; R, R min = halogen atoms; Y = a functional group; o, q = numbers, zero included, such that o+q = 1 to 20; n = numbers ranging from 1 to 15; m/n = a number ranging from 0.01 to 0.5; p = a number ranging from 1 to 20; s/p = a number ranging from 0.5 to 2; z/o+q = a number ranging from 0.01 to 0.05.n[EP0393230A2] |