| abstract |
A fluorine-containing polymer which is an active component of a surfacentreatment agent having excellent water- and oil-repellency is constituted by anfluorine-containing polyether monomer of the formula:n nwherein Rf is a perfluoroalkyl group having 1 to 18 carbon atoms, nR is hydrogen or a methyl group, nA 1 is a divalent linear or branched aliphatic group having 1 to 20 carbon atoms, nA 2 is a direct bond, or a divalent linear or branched aliphatic group having 1 to 10 carbonnatoms which may have an ether linkage, nX is a trivalent linear or branched aliphatic group having 2 to 5 carbon atoms, and nn is from 1 to 100. |