Patent ID: 8916643

Claim:
A water- and oil-repellent comprising an aqueous emulsion dispersed fluorine-containing copolymer having as a copolymerization composition: (A) 61.6 to 80 wt. % of perfluoroalkylalkyl methacrylates represented by the general formula: C 6 F 13 C m H 2m OCOCCH 3 ═CH 2 wherein m represents 1, 2, 3, or 4, (B) 5 to 32.9 wt. % of at least one of benzyl acrylate and benzyl methacrylate, (C) 5 to 32.9 wt. % of (i) vinylidene chloride together with at least one of (ii) polyethylene glycol monoacrylate and polyethylene glycol monomethacrylate, and (D) 0.5 to 28.4 wt. % of a cross-linkable group-containing polymerizable monomer, into water in the presence of a surfactant consisting of a polyoxyethylene polycyclic phenyl ether.