FLUORINATED ETHER COMPOUND, FLUORINATED ETHER COMPOSITION AND COATING FLUID, AND SUBSTRATE HAVING SURFACE-TREATED LAYER AND METHOD FOR ITS PRODUCTION

摘要

To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain (±²) having a C 4 oxyperfluoroalkylene unit (±) and an oxyperfluoroalkylene unit (²) other than the unit (±) and which has a hydrolysable silyl group on at least one terminal of the poly(oxyperfluoroalkylene) chain (±²) via a linking group.