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Ink composition comprising cationic, water-soluble resin

  • US 6,720,367 B2
  • Filed: 03/25/1998
  • Issued: 04/13/2004
  • Est. Priority Date: 03/25/1997
  • Status: Expired due to Fees
First Claim
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1. An ink composition consisting essentially of an alkali-soluble colorant, a water-soluble organic solvent, water, a cationic, water-soluble resin, a base which is hydroxide of an alkali metal or an alkaline earth metal and, optionally, one or more of a nonionic water-soluble resin and an assistant selected from the group consisting of a penetration accelerator, a viscosity modifier, a surface tension modifier, a hydrotropy agent, a humectant, a pH adjustor, an antimold, a chelating agent, a preservative and a rust preventive;

  • the cationic, water-soluble resin consisting of repeating units represented by the following formula (I);

    embedded imagewherein R1 and R2 which may be the same or different represent C1-5 alkyl group, andn is 0, 1, or 2.

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