| abstract |
Providing a fluorine-containing copolymer having a low environmental load and imparting excellent water repellency to an article surface, a method for producing the same, a water repellent composition using the fluorine-containing copolymer, and treating the surface with the water repellent composition article. A fluorinated copolymer having a unit mainly composed of F(CF2)6CH2CH2OC(O)C(CH3)=CH2, a unit mainly composed of vinyl chloride, and a unit mainly composed of vinylidene chloride in a specific ratio, a unit of a (meth)acrylic acid alkyl ester having 12 to 30 carbon atoms as a main unit, and a monomer having a non-fluoroalkyl group and a crosslinkable functional group as a main unit, wherein F(CF2) nCH2CH2OC(O)C(CH3)=CH2 (except that n is an integer from 1 to 5) is a unit of the main body below a certain ratio. Further, a water repellent composition containing the fluorocopolymer and an article treated with the water repellent composition. |