Patent ID: 9187665
Filing Date: 2015-11-17
Classification: C08K,C09D

Abstract:
1. An ink composition for inkjet printing, comprising: a self-dispersed carbon black pigment with alkali metal counter ions in an amount ranging from about 1.0% to about 6.0% by weight based on the total weight of the ink composition, the alkali metal counter ions being a single cationic species selected from the group consisting of sodium cations, lithium cations, and potassium cations; polyurethane in an amount ranging from about 0.1% to about 3.0% by weight based on the total weight of the ink composition; and an aqueous carrier making up the balance, said aqueous carrier comprising water, at least one water-soluble organic solvent, at least one surfactant, and an anti-halo additive selected from the group consisting of oleic acid, elaidic acid, and linoleic acid, wherein the anti-halo additive is present in an amount ranging from about 0.05 to about 0.5% by weight based on the total weight of the ink composition; wherein the concentration of the alkali metal counter ions is in the range of 800-1800 ppm.