Patent ID: 8231975

Claim:
A method of providing water repellency, alcohol repellency, and oil repellency, stain release, hydrophilicity stain release, and cleanability to substrates comprising contacting said substrate with a polymer having at least one urea 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 CF 2 ) p (CH 2 CH 2 ) q (R 1 ) r —XH wherein p and q are each independently an integer of 1 to 3; r is 0 or 1; X is —O—, —NH— or —S—; R l 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 R f is a linear or branched chain perfluoroalkyl group having 1 to 6 carbon atoms; and (ii) reacting with (c) water, a linking agent, or a mixture thereof.