Abstract: The present invention relates to a coating or composition comprising, and a method of making, multifunctional polymer particles comprising at least two reactive functionalities in the same particle, for example, an epoxy-functional or hydroxy-functional group in combination with an acid-functional group. Non-porous or porous coating compositions made from such a dispersion can be used to protect various substrates, including imaging layers, so that the coated product resists fingerprints, common stains, and spills.

Abstract: The invention relates to a pigment dispersion for an ink jet ink composition, the pigment dispersion comprising pigment particles having a median particle size of 200 nm or less, and a polymeric dispersant comprising a random addition copolymer comprising at least one hydrophobic monomer type and at least one hydrophilic monomer type, wherein the polymeric dispersant comprises from 50 weight percent to 80 weight percent of hydrophobic monomers relative to the total weight of the polymeric dispersant, and wherein, when the polymer comprises more than one hydrophobic monomer type, at least 50 weight percent of the hydrophobic monomers relative to the total weight of the hydrophobic monomers is an acrylate comprising an aromatic group. The invention also provides an ink composition and ink jet printing method using the pigment dispersion.