SILICON-CONTAINING FLUOROCHEMICAL SURFACE-TREATING AGENT

A surface-treating agent which comprises a fluoropolymer having repeating units derived from a fluoromonomer represented by the formula (I) wherein (a ) the fluoropolymer has one or more silicon atoms and/or (b) the surface- treating agent contains a nonfluorinated polymer, which is different from th e fluoropolymer, and this nonfluorinated polymer is a polymer having one or mo re silicon atoms. Even when the surface-treating agent contains a polymer of a fluorinated acrylate which has been substituted in the .alpha.-position by fluorine, chlorine, etc., it imparts excellent water-and-oil repellency and antifouling properties to textile products while maintaining their textures.