Patent ID: 8759419
Filing Date: 2014-06-24
Classification: C09D

Abstract:
1. A water-based ink for ink-jet recording comprising: a self-dispersible pigment modified by phosphate group; water; a water-soluble organic solvent; an additive selected from the group consisting of boric acids, a chelate agent, a reducing sugar, a sugar alcohol, and combinations thereof; and a cationic polymer contained in an amount ranging from 0.005% by weight to 0.03% by weight based on a total weight of the water-based ink, wherein the cationic polymer is selected from the group consisting of general formula (1), general formula (3), and combinations thereof; wherein general formula (1) is given by: wherein general formula (3) is given by: where p is an integer of 2 to 6 and q is an integer of 20 to 40.