Patent ID: 7470745

Claim:
A composition comprising a polymer containing at least one urea linkage prepared by (i) reacting (1) at least one organic diioscyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (2) at least one fluorochemical compound of Formula I R f —O(CF 2 CF 2 ) r (CH 2 CH 2 ) q (R 1 ) s XH Formula (I) wherein R f is a linear or branched C 1 to C 7 perfluoroalkyl optionally interrupted by one to three oxygen atoms, r is 1 to 3, q is 1 to 3, s is 0 or 1, X is O, S, or NR 2 wherein R 2 is H, or C 1 to C 6 alkyl, and R 1 is a divalent radical selected from —S(CH 2 ) n —, p is 1 to 50, and R 3 , R 4 and R 5 are each independently H or C 1 to C 6 alkyl; (ii) and then reacting with (3) water, a linking agent, or a mixture thereof, said composition providing water repellency, oil repellency, stain release, wicking, and cleanability to a substrate treated therewith.