Patent ID: 7678155

Claim:
A method of preparing a treated textile, comprising steps of: (1) preparing an emulsion of a water- and oil-repellent agent, (2) adding a cationic emulsifying agent to the prepared water- and oil-repellent agent to obtain a treatment liquid comprising the water- and oil-repellent agent and a stain blocking agent, (3) adjusting pH of the treatment liquid to at most 7, (4) applying the treatment liquid to a textile, (5) treating the textile with steam, and (6) washing the textile with water and dehydrating the textile, wherein the cationic emulsifying agent is selected from the group consisting of a monoalkyl ammonium salt, a dialkyl ammonium salt, a trialkyl ammonium salt, a dipolyoxyethylene alkyl methyl ammonium salt, a dipolyoxyethylene alkyl amine, a fatty acid amide of dipolyoxyethylene, and an alkyl amine wherein the number of carbon atoms of the alkyl group is from 1 to 22 and the total number of oxyethylene groups in the molecule is from 2 to 40, wherein the water- and oil-repellent agent comprises at least one fluorine-containing compound which is a fluorine-containing polymer comprising: (I) a repeating unit derived from a monomer having a fluoroalkyl group, represented by the formula: Rf—A—OCOCR 11 ═CH 2 wherein Rf is a fluoroalkyl group having 3 to 21 carbon atoms, R 11 is a hydrogen atom or a methyl group, and A is a divalent organic group, and (II) a repeating unit derived from a fluorine-free monomer which comprises at least one selected from a fluorine-free monomer which comprises at least one selected from the group consisting of vinyl halide and vinylidene halide, and wherein the cationic emulsifying agent is added in an amount of 33.3 to 333.3 parts by weight based on 100 parts (solid content) by weight of the fluorine-containing compound.