Patent ID: 7351870

Claim:
A compound having the formula R f — b CF(U) y (T) z Formula 1A or R f — b CF 2 b CF(U) y (T) z Formula 1B wherein R f is a linear or branched perfluoroalkyl radical Z(C m F 2m )—, m is 1, 3 to 20, or a mixture thereof; Z is F when m is 1, and Z is F, Cl, or H when m is 3 to 20, or a mixture thereof; b is 13 or 14; y is 1 and z is 0 or 1; and when y and z are each 1, U is F, and T is selected from the group consisting of monovalent radicals —X wherein X is I or Br, —CH 2 —CH 2 —X, —CH═CH 2 , —CH 2 —CH 2 —OH, —CH 2 —COOH, —CH 2 OH, — b CH 2 OH, —COOH, — b COOH, —O—CF(CF 3 )—C(O)F, —O—CF(CF 3 )—X, —SO 2 Y wherein Y is H, F or Cl, and —SO 3 H; and when y is 1, and z is 0, U is selected from the group consisting of divalent radicals ═CH—COOH, ═CH—CH 2 —OH, and ═O.