Patent ID: 8378061

Claim:
A film formed from a copolyester comprising a perfluorinated monomer, wherein the amount of the perfluorinated monomer is 10 wt % of the copolyester, wherein the film exhibits a hexane contact angle exceeding 60 degrees, and a water contact angle exceeding 110 degrees, wherein the copolyester is represented by formula (I), (II), or (III) wherein, for (I) and (II), each R is independently H, C 1 -C 10 alkyl, C 5 -C 15 aryl, or C 6 -C 20 arylalkyl; each Rx is Hydrogen; each X is independently O or CF 2 ; each Y is independently O or CF 2 ; each Z is independently H, Cl or Br; each Rf 1 is independently (CF 2 ) n , wherein each n is independently 0-10; each Rf 2 is independently (CF 2 ) p , wherein each p is independently 0-10, with the proviso that when p is 0, Y is CF 2 ; each q is independently 0-10; m is 1-10,000; and w is 1-10,000; and wherein, for (III), each R is independently H, C 1 -C 10 alkyl, C 5 -C 15 aryl, or C 6 -C 20 arylalkyl; each Rx is Hydrogen; each X is independently O or CF 2 ; each Y is independently O or CF 2 ; each Z is independently H, Cl or Br, with the proviso that only one Z can be H; and each Rf 1 is independently (CF 2 ) n , wherein each n is independently 0-10 each Rf 2 is independently (CF 2 ) p , wherein each p is independently 0-10, with the proviso that when p is 0, Y is CF 2 ; each q is independently 0-10; m is 1-10,000; and w is 1-10,000.