Patent ID: 7332532
Filing Date: 2008-02-19
Classification: C09D

Abstract:
1. An ink-jet ink, comprising a) a liquid vehicle; and b) a polymer-dispersed pigment dispersed in the liquid vehicle, said polymer-dispersed pigment including a pigment encapsulated with a polymer, said polymer being a polymerization product of at least a first monomer having a hydrophilic group, and a second monomer having a hydrophobic group, said polymer including styrene-trifluoroacrylic acid-vinylsulfonic acid copolymer, styrene-α(trifluoromethyl)acrylic acid-vinylsulfonic acid copolymer, or styrene-trifluoroacrylic acid copolymer, wherein the polymer-dispersed pigment is stable in the liquid vehicle at a pH from about 5.5 to about 8.5, and wherein the first monomer is used to form from about 10 wt % to about 50 wt % of the polymer or the second monomer is used to from about 25 wt % to about 80 wt % of the polymer.