Lexmark International, Inc.

William David Kappele

Anna Marie Pearson

James M Mrvos

Ajay Kanubhai Suthar

Ajay Kanubhalsuthar

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 C -C 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.

Ink compositions

An ink composition comprises red pigment and a carrier mixture. The carrier mixture comprises a bishydroxy terminated thioether and a lactam.

Pigment-based ink compositions

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.

Wet-rub resistant ink compositions

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.

High performance ink compositions with non-benzidine based colorants

High performance ink compositions are described and the ink compositions comprise oxycarbons like glycols as well as bishydroxy terminated thioethers like 2,2'-thiodiethanol.

High performance ink compositions

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.

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Lexington, KY, United States of America

William David Kappele