| abstract |
Disclosed is a fluorine-based stain-proofing agent composition using a short-chain perfluoroalkyl group. This stain-proofing agent composition can be in the form of an aqueous dispersion containing almost no volatile organic solvent, while exhibiting good soil release property (SR property). Specifically disclosed is a stain-proofing agent composition characterized by containing a fluorine-containing copolymer which has an anionic group at an end of the main chain, while containing 30-70% by mass of a polymerization unit (a') having a perfluoroalkyl group with 1-6 carbon atoms, 20-69% by mass of a polymerization unit (b') having an alkylene oxide chain and 1-10% by mass of a polymerization unit (c') having an amino group. |