Silicon-containing fluorochemical surface-treating agent

摘要

There is provided a surface treatment agent which comprises a fluoropolymer having repeating units derived from a fluorine-containing monomer of the formula: wherein (a) the fluoropolymer contains a silicon atom, and/or (b) the surface treatment agent contains a fluorine-free polymer which is different from the fluoropolymer and which is a silicon-containing polymer. The surface treatment agent imparts excellent water- and oil-repellency and soil resistance to textiles while retaining the feeling of the textiles, even if the surface treatment agent contains a fluorine-containing acrylate polymer substituted at its α-position by a fluorine atom, a chlorine atom or the like.