Patent ID: 9296908
Filing Date: 2016-03-29
CPC Classification: C09D

Claim Text:
1. An aqueous inkjet ink composition comprising a pigment, a pigment-dispersing resin, resin fine particles (A), water, and hydrophilic solvents (B), wherein the resin fine particles (A) is formed by emulsion polymerizing ethylenically unsaturated monomers including: 20% to 80% by weight of an aromatic ethylenically unsaturated monomer (C) that does not have an ionic functional group; 0.6% to 6% by weight of water-soluble ethylenically unsaturated monomers (F) consisting of 0.5% to 3% by weight of a sulfonic acid group-containing ethylenically unsaturated monomer (D) and 0.1% to 3% by weight of a nonionic water-soluble ethylenically unsaturated monomer (E), wherein the sulfonic acid group-containing ethylenically unsaturated monomer (D) is a styrenesulfonic acid group-containing ethylenically unsaturated monomer; and 0.1% to 10% by weight of a crosslinkable ethylenically unsaturated monomer (G), wherein the crosslinkable ethylenically unsaturated monomer (G) is a monomer having two or more allyl groups, wherein an average particle size of the resin fine particles (A) is from 73 nm to 250 nm, and the amount of coarse particles having a particle size of 1 μm or greater in an aqueous dispersion of the resin fine particles (A) at a solid concentration of 30 ppm is 4×10 wherein the hydrophilic solvents (B) include a glycol-based solvent (H) and an ethylene glycol ether-based solvent (I).