Patent ID: 7682771

Claim:
A fluorochemical copolymer composition comprising: (A) fluorochemical selected from the formula: wherein RF is a fluorinated group having the formula: R f —W—, wherein R f is a perfluoropolyether group and W is a divalent linking group; PI is a monovalent pendant organic moiety comprising benzophenone, substituted benzophenone, acetophenone, or substituted acetophenone groups; R is H, CH 3 , or F; Rh is lower alkyl selected from the group consisting of linear or branched alkyl groups having from 1 to about 8 carbon atoms, cycloalkyl-containing alkyl groups having from 4 to about 8 carbon atoms, and cycloalkyl groups having from 3 to about 8 carbon atoms; m is at least 2; n is at least 1; q is zero or greater.