Patent ID: 7976583

Claim:
A copolymer containing, based on the total weight of the copolymer: a) 40 to 97 wt % of a perfluoroalkylethyl methacrylate mixture, b) 1 to 50 wt % of a C 12 -C 22 alkyl (meth)acrylate and c) 0.5 to 10 wt % of at least one thermally crosslinkable or isocyanate-reactive monomer, and d) 1.5 to 50 wt % of vinyl chloride and/or vinylidene chloride; wherein the perfluoroalkyl group of the perfluoroalkylethyl methacrylate conforming to the formula R F CH 2 CH 2 OCOC(CH 3 )═CH 2 contains 1 to 10 wt % of 4 or fewer fluorinated carbon atoms and 90 to 99 wt % of 6 fluorinated carbon atoms.