Patent ID: 7354476

Claim:
An inkjet ink composition comprising a colorant, a liquid medium, and an inkjet ink binder, said binder comprising an aqueous dispersion of polymer particles, said polymer comprising as polymerized units from 3 to 20 wt. % monoethylenically unsaturated acid monomer, based on polymer weight, and having a glass transition temperature (Tg) in the range of from âˆ’40Â° C. to 120Â° C., and said polymer particles having a volume average particle diameter as measured by dynamic light scattering of at least 35 nanometers greater than the weight average particle diameter as measured by capillary hydrodynamic fractionation; and wherein said polymer particles have been formed by emulsion polymerization in the presence of a neutralizer in the amount of from 20 to 75%, on an equivalents basis, based on said monoethylenically unsaturated acid monomer.