Water- and- oil repellent composition and process for producing the same

A process for producing a water and oil repellent composition, comprising:

• emulsifying under pressure and polymerizing a feed material composition comprising
• a (meth)acrylate (a1) having a polyfluoroalkyl group,
• a polymerizable monomer (a2) which comprises a polymerizable unsaturated group and a hydroxyl group and in which the polymerizable unsaturated group and the hydroxyl group are connected to each other through 7 or more covalent bonds,
• a surfactant (B) comprising a nonionic surfactant in an amount of from 60 to 100 wt %;
• and
• an aqueous medium (C) an aqueous medium selected from the group consisting of i) water only, and ii) a mixture of water and a water-soluble organic solvent,
• to obtain an aqueous dispersion having a polymer (A) dispersed in said aqueous medium (C), and
• incorporating a cross-linkable compound (D) to said aqueous dispersion;
• wherein said nonionic surfactant in said surfactant (B) is selected from the group consisting of
• (b1) a nonionic surfactant comprising units obtained from a polyoxyalkylene monoalkyl ether, a polyoxyalkylene monoalkenyl ether or a polyoxyalkylene monoalkpolyenyl ether;
• (b2) a nonionic surfactant comprising units obtained from a compound which has at least one carbon-carbon triple bond and at least one hydroxyl group in its molecule and which exhibits a surface activity;
• (b3) a nonionic surfactant comprising units obtained from a compound in which a polyoxyethylene moiety having two or more oxyethylenes chained and a moiety having two or more oxyalkylenes having a carbon number of 3 or more chained, are connected, and both terminals are hydroxyl groups;
• (b4) a nonionic surfactant having an amine oxide moiety in its molecule;
• and
• (b5) a nonionic surfactant comprising units obtained from a condensate of a polyoxyethylene mono(substituted phenyl) ether, or a polyoxyethylene mono(substituted phenyl) ether.