Inkjet inks having improved print uniformity

Details Inkjet inks having improved print uniformity Inkjet inks having improved print uniformity

2008-08-20

2011-12-20

Martin, Laura (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C106S031130

Reexamination Certificate

active

08079695

ABSTRACT:
An inkjet printer, includes an ink containing a print uniformity improving polymer obtained by chain copolymerizing at least the following ethylenically unsaturated monomers:(a) a first monomer having a lowest pKa value greater than 3 and comprising a carboxylic acid group;(b) a second monomer having a lowest pKa value less than 2; and(c) a hydrophobic third monomer;together with pigment particles that are self-dispersed or dispersed with a dispersant other than a print uniformity improving polymer, and water. Such an ink provides improve print uniformity.

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Harry J. Spinelli: “Polymeric Dispersants in Ink Jet Technology”, Advanced Materials, vol. 10, No. 15, 1998, pp. 1215-1218, XP002549350.

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