Patent ID: 8563634

Claim:
An inkjet ink composition, comprising: from 0.25 weight percent to 6 weight percent colorant; from 5 weight percent to 40 weight percent solvent; from 0.05 weight percent to 5 weight percent surfactant; polyurethane binder in an amount of at least 0.5 weight percent of the inkjet ink composition but not more than twice the weight percent of the colorant, the polyurethane binder formed from a polyether polyol, an aliphatic isocyanate, and an acid group; and a balance of water; wherein the polyurethane binder does not include chain extenders; and wherein the solvent includes a component solvent selected from the group consisting of 1,3-di(hydroxyethyl)-5,5-dimethylhydantoin, betaine, and combinations thereof.