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Slow-penetrating inkjet fixer composition and methods and systems for making and using same

  • US 7,722,179 B2
  • Filed: 03/30/2006
  • Issued: 05/25/2010
  • Est. Priority Date: 03/30/2006
  • Status: Active Grant
First Claim
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1. An inkjet fixer composition, comprising:

  • a) an aqueous ink vehicle including at least two co-solvents including from 5 to 20 weight percent of 4-methylmorpholine-N-oxide titrated to a pH of 4-6 with methanesulfonic acid and from 6 to 12 weight percent of trimethylolpropane;

    b) from 1 to 2 weight percent of at least one polyamine polycation;

    c) from 0 to 0.1 weight percent carboxybenzotriazole; and

    d) from 0 to 0.4 weight percent non-ionic fluorosurfactant and from 0 to 0.5% non-ionic acetylenic diol-based surfactant;

    wherein the fixer composition is slow penetrating into a substrate; and

    wherein the fixer composition underprints an ink-jet ink on the substrate, the ink-jet ink comprising;

    a) an aqueous liquid vehicle; and

    b) a colorant;

    wherein the fixer composition vehicle and the ink-jet ink vehicle form a vehicle mixture on the substrate after which the vehicle mixture penetrates into the substrate, and an ink image is formed on the substrate.

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