Ink-jet printing method
AssigneeMeadWestvaco Corporation
InventorsG. Frederick Hutter, Michael D. Matzinger
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Abstract
A cationic, water-soluble polymer is disclosed as a substrate treatment resin (i.e., coating) to improve color-fastness and adhesion of an ink-jet ink printed onto the substrate. More particularly, a 50% solids aqueous solution of a cationic acrylic resin is provided as the printed substrate treatment resin. Also disclosed is a method for preparing the invention resin.
Claims23
An improved method of printing an ink-jet ink composition comprising a colorant and a carrier material wherein the improvement comprises the steps of (a) printing the ink onto a cellulose substrate and (b) coating the printed substrate with a cationic, water-soluble polymer comprised of a first monomer, a second monomer, and a third monomer wherein the first monomer is N-vinylpyrrolidinone, the second monomer is selected from the group consisting of N-methylolacrylamide, N-methylolmethacrylamide, N-isobutoxymethylacrylamide, and mixtures thereof, and the third monomer is represented by the formula:
- CH2═C(R)COY(CH2)nN+R′R″R′″X−
- wherein R is a hydrogen atom or a methyl group;
- Y is O or NH;
- n is an integer from 1 to about 4;
- R′, R″, and R′″ are hydrogen or alkyl or aralkyl groups independently containing from 1 to about 18 carbon atoms;
- and X is an anion such as chloride, bromide, tosylate, or alkylsulfate.
Dependencies are inferred from the claim text.