Patent ID: 8827417

Claim:
An aqueous inkjet ink composition comprising: (a) a colorant; (b) an aqueous vehicle; and (c) a first polyurethane additive comprising an alkoxy aromatic diol, a diol substituted with an ionic group, and isocyanates wherein the alkoxy aromatic diol is Z 1 wherein Ar is an aromatic group, n, m, p, and q are integers, n, m are the same or different and are greater than or equal to 2 to 12, p is greater than or equal to 1 to 15, q is greater than or equal to 0 to 15, R 1 , R 2 are the same or different and each is independently selected from the group consisting of hydrogen, methyl, ethyl and higher alkyls of the formula of C t H 2t+1 ; where t is an integer and is greater than or equal to 3 to 36, Z 2 is a diol substituted with an ionic group; and at least one Z 1 and at least one Z 2 must be present in the first polyurethane additive.