Patent ID: 8955953
Filing Date: 2015-02-17
Classification: C09D

Abstract:
1. An inkjet recording ink comprising: a carbon black, a dispersant comprising a sodium naphthalenesulfonate formalin condensate, wherein the sodium naphthalenesulfonate formalin condensate comprises dimer, trimer and tetramer naphthalenesulfonates in a total amount of (dimer+trimer+tetramer naphthalene sulfonates) of from 20% by mass to 80% by mass based on total amount of sodium naphthalenesulfonate formalin condensate, a polyurethane resin particle, and water, wherein the carbon black is a channel black, a gas black, or a mixture of a channel black and a gas black, and the polyurethane resin particle is an anionic self-emulsifying ether-based polyurethane resin particle, wherein the anionic self-emulsifying ether-based polyurethane resin particle has an acid value of from 40 to 120 and a mass-average molecular weight of from 500 to 50,000, and an average primary particle diameter of 20 nm or less.