FLUOROOXYALKYLENE GROUP-CONTAINING POLYMER MODIFIED PHOSPHONIC ACID DERIVATIVE AND SURFACE TREATMENT AGENT CONTAINING THE DERIVATIVE, ARTICLE AND OPTICAL ARTICLE TREATED BY THE SURFACE TREATMENT AGENT

摘要

PROBLEM TO BE SOLVED: To provide a compound forming a coated film excellent in water repellent and oil repellent, low dynamic friction, wiping of stain, releasability, abrasion resistance and adhesion to a substrate, a surface treatment agent capable of maintaining performance over long time and having durability containing the same, an article and an optical article treated by the surface treatment agent.SOLUTION: There is provided a fluorooxyalkylene group-containing polymer modified phosphonic acid derivative represented by the formula (1), where A is a monovalent fluorine-containing group with terminal of a -CFgroup or the same group as a group connecting to Rf, B is H, an acyl group or a silyl group, Q is a bivalent connecting group having a silicon atom on both terminals, X is each independently H, an alkali metal atom, an unsubstituted/substituted C1 to 5 alkyl group, aryl group or a monovalent group expressed by JSi-, where J is each independently an unsubstituted/substituted C1 to 5 alkyl group or aryl group and a and b are each independently an integer of 2 to 20.SELECTED DRAWING: None