Patent ID: 6156384
Filing Date: 2000-12-05
Classification: B41M,D06P

Abstract:
An improved method of printing an ink-jet ink composition comprising a colorant and a carrier material wherein the improvement comprises printing the ink onto a substrate coated 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:CH.sub.2 .dbd.C(R)COY(CH.sub.2).sub.n N.sup.+ R'R""R'""X.sup.-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 a hydrogen atom 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, and wherein the colorant is a pigment and the cationic, water-soluble polymer is characterized by a weight average molecular weight of from about 3,000 to 30,000.