Patent ID: 7345098
Filing Date: 2008-03-18
Classification: C09D

Abstract:
1. A water-based ink comprising an aqueous dispersion of polymer particles comprising a water-insoluble vinyl polymer containing a colorant, wherein the water-insoluble vinyl polymer is prepared by polymerizing a monomer composition comprising: (i) a monomer (A) represented by the formula (III): wherein R (ii) a monomer (B) having a salt-forming group; (iii) a monomer (C) copolymerizable with the monomer (A) and the monomer (B), and (iv) a monomer (D) copolymerizable with the monomer (A), the monomer (B), and the monomer (C), and represented by the formula (IV): wherein R wherein the monomer (A) is present in an amount of from 5 to 45 % by weight, the monomer (B) is present in an amount of from 3 to 40% by weight, the monomer (C) is present in an amount of from 15 to 87% by weight, and the monomer (D) is present in an amount of from 5 to 35% by weight in the water-insoluble vinyl polymer, wherein % by weight is based on the total weight of the water-insoluble vinyl polymer.