Patent ID: 6586498
Filing Date: 2003-07-01
Classification: C09D

Abstract:
An ink jet ink composition comprising from about 0.5% to about 30% by weight of a pigment, a carrier and a dispersant, said dispersant comprising an anionic derivative of an ethoxylated alkylphenol-formaldehyde resin, the ratio of dispersant:pigment being from about 0.1:1 to about 5:1, said anionic derivative of an ethoxylated alkylphenol-formaldehyde resin having the formula: wherein:each R independently represents a linear or branched alkyl, alkenyl, or arylalkyl group having from about 4 to about 30 carbon atoms; x is an integer from 0 to 20; y is an integer from 1 to 20; with the proviso that x+y is from 2 to 20; z is an integer from 4 to 20; A is an anionic group comprising sulfate, sulfonate, phosphate, phosphonate or carboxylate; and M is a cationic group.