Ink and underprinting fluid combinations with improved inkjet print image color and stability
First Claim
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1. A dye-based ink-jet ink composition comprising:
- at least one water-soluble dye and, at least one water-soluble anionic binder, wherein the at least one anionic binder comprises a polymer having at least one complexing group selected from the group consisting of Ethylene Diamine Tetracetic Acid, Acetyl Acetonate, Maleic Anhydride, Acrylate and combinations thereof;
and wherein, when the ink composition is printed on a medium over an underprinted fixer fluid comprising at least one cationic component, the printed ink composition and the underprinted fixer fluid together form an amorphous, viscous fluid on the medium, the mixture being an amorphous viscous fluid, having a viscosity greater than the ink;
and wherein the at least one cationic component comprises a cationic polyelectrolyte selected from the group consisting of R1R2R3R4N+;
R1R2R3R4P+and R1R2R3R4As+, where R can be H, alkyl or other organic substituent, and where the cationic polyelectrolyte is from 2000 up to 10,000 weight average molecular weight;
and wherein the cationic polyelectrolyte is in solution with non-polymeric cations selected from the group consisting of calcium ions, aluminum ions, barium ions, strontium ions, zinc ions, magnesium ions and titanium ions.
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Abstract
Combinations of cationic underprinting fluids and anionic ink compositions that together achieve improved color quality and image stability in ink-jet printed images.
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Citations
18 Claims
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1. A dye-based ink-jet ink composition comprising:
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at least one water-soluble dye and, at least one water-soluble anionic binder, wherein the at least one anionic binder comprises a polymer having at least one complexing group selected from the group consisting of Ethylene Diamine Tetracetic Acid, Acetyl Acetonate, Maleic Anhydride, Acrylate and combinations thereof;
and wherein, when the ink composition is printed on a medium over an underprinted fixer fluid comprising at least one cationic component, the printed ink composition and the underprinted fixer fluid together form an amorphous, viscous fluid on the medium, the mixture being an amorphous viscous fluid, having a viscosity greater than the ink;
and wherein the at least one cationic component comprises a cationic polyelectrolyte selected from the group consisting of R1R2R3R4N+;
R1R2R3R4P+and R1R2R3R4As+, where R can be H, alkyl or other organic substituent, and where the cationic polyelectrolyte is from 2000 up to 10,000 weight average molecular weight;
and wherein the cationic polyelectrolyte is in solution with non-polymeric cations selected from the group consisting of calcium ions, aluminum ions, barium ions, strontium ions, zinc ions, magnesium ions and titanium ions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An underprinting fixer fluid comprising:
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at least one cationic component, wherein the at least one cationic component comprises a cationic polyelectrolyte selected from the group consisting of R1R2R3R4N+;
R1R2R3R4P+and R1R2R3R4As+, where R can be H, alkyl or other organic substituent, and where the cationic polyelectrolyte is from 2000 up to 10,000 weight average molecular weight;
and wherein the cationic polyelectrolyte is in solution with non-polymeric cations selected from the group consisting of calcium ions, aluminum ions, barium ions, strontium ions, zinc ions, magnesium ions and titanium ions;
and wherein, when an ink-jet ink composition comprising at least one water-soluble dye and at least one water-soluble anionic binder is printed on a portion of a medium underprinted with the fixer fluid, the ink composition and the fixer fluid together form an amorphous viscous fluid, the viscous fluid having a viscosity greater than the ink;
and wherein the at least one anionic binder comprises a polymer having at least one complexing group selected from the group consisting of Ethylene Diamine Tetracetic Acid, Acetyl Acetonate, Maleic Anhydride, Acrylate and combinations thereof. - View Dependent Claims (11, 12, 13, 14, 17, 18)
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- 15. The underprinting fixer fluid of 10, wherein the at least one dye comprises anionic functional groups.
Specification