Abstract: An inkjet ink composition having a binder including an aqueous dispersion of polymer particles, the polymer including, as polymerized units, (a) from 0 to 1 wt. % monoethylenically unsaturated acid monomer, based on polymer weight; and (b) monomer of the formula CH2?C(R1)—CON(R2)(R3) wherein R1?H, CH3 or C2H5 and R2 and R3 are independently selected from C1-C6 saturated alkyl and cycloalkyl groups; and wherein the total of (a) and (b) is at least 0.1 wt % monomer based on the polymer weight. The binder may be a copolymer of ethyl acrylate and acrylamide. An inkjet ink composition including the inkjet ink binder, a colorant, and a liquid medium is also provided.

Abstract: An inkjet ink composition having a binder including an aqueous dispersion of polymer particles, the polymer comprising as polymerized units from 3 to 20 wt. % monoethylenically unsaturated acid monomer, based on polymer weight, and having a glass transition temperature (Tg) in the range of from ?40° C. to 120° C., and the polymer particles having a volume average particle diameter as measured by dynamic light scattering of at least 35 nanometers greater than the weight average particle diameter as measured by capillary hydrodynamic fractionation is provided. An inkjet ink composition including the inkjet ink binder is also provided.

Abstract: The invention relates to an aqueous ink composition for use in ink jet printers comprising an aqueous carrier, a colorant, a polymeric dispersant, and a specific cosolvent mixture comprising C2-C8 terminal alkanediols with a second component selected from polyethylene glycol-type materials and polyol/alkylene oxide condensates. The ink compositions demonstrate excellent stability, good maintenance characteristics for the printers in which they are used, and excellent optical density and print characteristics.

Abstract: An ink jet printer for printing on a print medium includes a paper transport assembly with a plurality of rolls defining an approach path to a printing area and a return path from a printing area. A printhead positioned in the printing area is configured for jetting ink at selected locations on the print medium. A print medium heating assembly includes a heated roll, a first backup roll and a second backup roll. The heated roll and the first backup roll define a first nip therebetween and the heated roll and the second backup roll define a second nip therebetween. The first nip is positioned in association with the aproach path and the second nip is positioned in association with the return path.

Abstract: Wet-rub resistant ink compositions are described and the ink compositions have a binder material or binder composition which may be prepared from monomeric precursors which include vinyl halides, acrylates, alkylol amides and urethanes.

Abstract: High performance ink compositions are described and the ink compositions have a novel colorant set which includes a quinacridone, a phthalocyanine and a monoazo compound, and no benzidine based colorants.

Abstract: A method for making a dispersion for an ink, and the ink obtained from this method. The method comprises preparing a dispersion comprising colorant agglomerates and reducing the agglomerate size using a plastic medium. The dispersion is formed by dispersing the colorant agglomerates in a dispersant, optionally in the presence of a liquid carrier such as distilled or deionized water. The colorant in the dispersion may be a carbon black, yellow, cyan, or magenta pigment, or a combination thereof. The plastic medium is preferably a grinding medium, such as polystyrene.

Abstract: The invention relates to an aqueous ink composition for use in ink jet printers comprising an aqueous carrier; a pigment; and a copolymer comprising a hydrophilic segment having an acidic function group, and a hydrophobic segment having a hydrolytically stable siloxyl substituent.

Abstract: The invention relates to polymeric dispersants used in formulating aqueous ink compositions, as well as inks containing those dispersants. The dispersants are graft copolymers comprising a hydrophilic polymeric segment, a hydrophobic polymeric segment incorporating a hydrolytically-stable siloxyl substituent, and a stabilizing segment, such as a reactive surfactant macromer, a protective colloid macromer, or a non-siloxyl hydrophobic monomer. The inks made with these dispersants show excellent stability, print characteristics, water-fastness, light-fastness, optical density, and in-use maintenance characteristics.

Abstract: The invention relates to polymeric dispersants used in formulating aqueous ink compositions, as well as inks containing those dispersants. The dispersants are graft copolymers comprising a hydrophilic polymeric segment, a hydrophobic polymeric segment incorporating a hydrolytically-stable siloxyl substituent, and a stabilizing segment, such as a reactive surfactant macromer, a protective colloid macromer, or a non-siloxyl hydrophobic monomer. The inks made with these dispersants show excellent stability, print characteristics, water-fastness, optical density, and in-use maintenance characteristics.

Abstract: The invention relates to an aqueous ink composition for use in ink jet printers comprising an aqueous carrier, an insoluble pigment, a polymeric dispersant, and a specific cosolvent mixture comprising 1,3-propanediol or 1,4-butanediol with a second component selected from polyethylene glycol-type materials and polyol/alkylene oxide condensates. The ink compositions demonstrate excellent stability, good maintenance characteristics for the printers in which they are used, and excellent optical density and print characteristics.