Patent ID: 6090193
Filing Date: 2000-07-18
Classification: C09D

Abstract:
An ink composition comprising (a) an aqueous liquid vehicle, (b) an effective amount of a colorant, and (c) a binder material which ionically or physically entraps the colorant, comprising (i) a polymeric resin having acidic groups selected from the group consisting of carboxylic acid, sulfonic acid and phosphonic acid groups and (ii) a neutralizing composition of a nonvolatile organic base and a volatile amine, wherein the polymeric resin is water soluble or rendered water soluble by neutralization with the neutralizing composition and wherein the nonvolatile organic base is of a type and present in an amount such that the polymeric resin remains in solution upon volatilization of the volatile amine, and further wherein the composition becomes insoluble in water after drying on a substrate.