Inkjet ink, ink set and method of printing
AssigneeE.I. du Pont de Nemours and Company
InventorRichard Douglas Bauer
Life of this patent
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Abstract
This invention pertains to an inkjet ink comprising a polyazetidinium groups-containing component, various ink sets comprising this ink, including one ink set with at least one co-reactive ink, and a method of printing with the ink and ink sets. When the inks are printed onto a substrate, the polyazetidinium groups can chemically react to enhance the durability of the printed image.
Claims8
An aqueous inkjet ink comprising an aqueous vehicle and an azetidinium groups-containing component dispersed and/or dissolved in the aqueous vehicle, wherein the azetidinium groups-containing component comprises monomer, oligomer or polymer molecules, or mixtures of one or more thereof, possessing on average at least two azetidinium groups per molecule, wherein said ink has a surface tension in the range of about 20 dyne/cm to about 70 dyne/cm at 25° C., and a viscosity of 30 cP or less at 25° C., and wherein
- said ink does not contain a colorant.
An ink set comprising at least two inks, wherein:
- at least one of the inks is a first aqueous inkjet ink comprising a first aqueous vehicle and an azetidinium groups-containing component dispersed and/or dissolved in the first aqueous vehicle, wherein the azetidinium groups-containing component comprises monomer, oligomer or polymer molecules, or mixtures of one or more thereof, possessing on average at least two azetidinium groups per molecule, and wherein the first aqueous ink has a surface tension in the range of about 20 dyne/cm to about 70 dyne/cm at 25° C., a viscosity of 30 cP or less at 25° C., and does not contain a colorant;
- and
- wherein at least one other ink is a second aqueous inkjet Ink comprising a second aqueous vehicle, a colorant and a co-reactive species dispersed and/or dissolved in the second aqueous vehicle, the co-reactive species comprising one or more moieties reactive with polyazetidinium groups.
Dependencies are inferred from the claim text.