| abstract |
A polymer having at least one carbamate linkage prepared by: (i) reacting (a) at least one diisocyanate, polyiso-cyanate, or mixture thereof, and (b) at least one fluorinated compound selected from the formula (I): R f (CH2)x [(CF2CF2)y(CH2CH2)z]m (R1)r-XH (I) wherein R f is a perfluoroalkyl group having 1 to about 6 carbon atoms; subscript x is1 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 car-bons in said formula (I) excluding (R1)r-XH ranges from about 8 to about 22; X is -O-, -NR-, -S-, -S(CH2)t O-, or -S(CH2)t NR-; subscript t is from 1 to about 10; R is H or C1-4 alkyl; R1 is certain divalent radicals; n is 2 to 4; s is 1 to about 50; R2, R3, and R4 are each independently hydrogen or a C1-C6 alkyl group; and (ii) optionally reacting with (c) water, a linking agent, or a mixture thereof. |