| abstract |
To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, capable of forming a surface layer which has high initial water/oil repellency and which is excellent in abrasion resistance, fingerprint stain removability, lubricity and uniformity, as well as a substrate having such a surface layer, and a method for its production. A substrate having a surface layer formed of a fluorinated ether compound represented by D 1 -R f1 -O-CH 2 -(C m F 2m O) n -A (D 1 is CF 3 - or CF 3 -O-; R f1 is a C 1-20 fluoroalkylene group containing at least one hydrogen atom, etc.; m is 1 to 6; n is 1 to 200; A is -C a F 2a -B-C b H 2b -SiL c R 3-c ; B is -C g H 2g O-, -C h H 2h O-C(=O)NH-, etc.; L is a hydrolysable group; R is a monovalent hydrocarbon group, etc.; a is 1 to 5; b is 1 to 10; c is 1 to 3; g is 1 to 5; and h is 1 to 5) or a fluorinated ether composition containing the compound; and a method for its production. |