Patent ID: 7968669

Claim:
A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (b) at least one fluorinated compound selected from the formula (I): R f (CH 2 ) x [(CF 2 CF 2 ) y (CH 2 CH 2 ) z ] m (R 1 ) r —XH (I) wherein R f is a linear or branched chain perfluoroalkyl group having 1 to about 6 carbon atoms; subscript x is an integer from 1 to about 6; subscripts y, z and m are each independently 1, 2 or 3, or a mixture thereof; subscript r is 0 or 1; the total number of carbons in said formula (I) excluding (R 1 ) r XH ranges from about 8 to about 22; X is —O—, —NR—, —S—, —S(CH 2 ) t O—, or —S(CH 2 ) t NR—; subscript t is from 1 to about 10; R is H or C 1-4 alkyl; R 1 is a divalent radical selected from the group consisting of —S(CH 2 ) n —, n is an integer of 2 to 4; s is an integer of 1 to 50; R 2 , R 3 , and R 4 are each independently hydrogen or an alkyl group containing 1 to 6 carbon atoms; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof.