Patent ID: 8470954

Claim:
A polyisocyanate macromer or mixture of macromers of the formula: wherein f is two or more; “a” is one to five and R 1 is where the ethylene oxide portion of R 1 is linear or branched, d is an average real number of repeating units that is greater than 0 and up to 5 and c is from 1 to 100; R 2 is (R 4 x R 3 — (R 2 ) where R 3 is a linear or branched residue of a water soluble polymer that forms ester linkages to R 4 , and urethane linkages to R 1 when “a” is one or more; and R 4 is a linear or branched organic residue capable of having “x” carboxylate end-groups where 2≦x≦6.