Patent ID: 8796368

Claim:
A water- and oil-repellent consisting of (A) an aqueous dispersion of a fluorine-containing copolymer, obtained by emulsion polymerization of: (a) at least one of perfluoroalkylalkyl acrylates and corresponding methacrylates represented by the general formula: C n F 2n+1 C m H 2m OCOCR═CH 2 wherein R represents hydrogen atom or methyl group; n represents 4, 5, or 6; m represents 1, 2, 3, or 4, (b) benzyl acrylate or benzyl methacrylate, (c) vinylidene chloride, and (d) a cross-linkable group-containing polymerizable monomer; in the presence of a polyethylene oxide adduct type nonionic surfactant and an emulsifying aid composed of glycol-based compound, and (B) a blocked isocyanate added to the aqueous dispersion (A) in a weight ratio of 0.05 to 3.0 to the weight of the solid content of the aqueous dispersion (A), wherein the fluorine-containing copolymer has a copolymerization composition of 10 to 80% by weight of the component (a), 5 to 80% by weight of the component (b), 5 to 80% by weight of the component (c), and 0.5 to 40% by weight of the component (d).