Surface treating agent, article and fluorinated ether compound

摘要

To provide a surface treating agent and a composition for surface treatment capable of forming a coating film excellent in the water/oil repellency, the efficiency for removal of oil-and-fat stains, alkali resistance and heat resistance and having a low coefficient of friction; a method for treating the surface of an article by using the surface treating agent or the composition for surface treatment; an article having surface treatment applied; and a novel fluorinated ether compound useful as a surface treating agent. A surface treating agent comprising a compound represented by the following formula (A): RFO(CF2CF2O)aCF2C(O)N(H)b(-Q-OC(O)C(R)═CH2)2-b  (A) wherein RF is a C1-20 perfluoro monovalent saturated hydrocarbon group or the like; a is an integer of from 1 to 200; b is 0 or 1; Q is a C1-6 alkylene group or the like; and R is a hydrogen atom or a C1-3 alkyl group.