Patent ID: 7803892

Claim:
An aqueous emulsion composition comprising: (A) an aqueous resin emulsion comprising a homopolymer or copolymer comprising at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate or methacrylate group, or a copolymer comprising said polymerizable compound and another compound copolymerizable therewith, and (B) a surfactant of the formula: R 1 O—(CH 2 CH 2 O) p —(R 2 O) q —R 3 (1) wherein R 1 is an alkyl group having 1 to 22 carbon atoms or an alkenyl group having 2 to 22 carbon atoms, R 2 is propylene, R 3 is a hydrogen atom, p is the number of at least 2, q is the number of at least 1, and p and q are such numbers that the weight ratio of the polyoxyethylene block is from 5 to 80% by weight based on whole molecule, wherein the surfactant (B) is added to the aqueous resin emulsion (A), after the polymerizable compound is emulsion-polymerized to give the aqueous resin emulsion (A) comprising the homopolymer or copolymer.