Encapsulated pigment for ink-jet ink formulations and methods of producing same

摘要

Encapsulated pigment for use in ink-jet ink formulations, improved ink-jet ink formulations using the encapsulated pigment, and methods for producing same. The pigment particles are pretreated with a polymer that is soluble in organic solvents, but substantially insoluble in water. The pigment particles are added to a solution of polymer/organic solvent, mixed to form a paste then collected after driving off the solvent. The encapsulated pigment can be used to prepare an ink-jet ink formulation by grinding it in a water carrier with a conventional polymer dispersant.