Ink compositions and related methods
AssigneePPG Industries Ohio, Inc.
InventorsW. David Polk, Dennis L. Faler, Noel R. Vanier, Eldon L. Decker
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Abstract
Disclosed are ink compositions comprising a liquid vehicle and a colorant, wherein the colorant comprises polymer-enclosed color-imparting particles, wherein the particles are enclosed by a friable polymer. Also disclosed are methods for making an ink composition and methods for improving the transparency of an ink composition comprising a pigment colorant.
Claims17
An ink composition comprising:
- (a) a vehicle;
- and
- (b) a colorant,
- wherein the colorant comprises polymer-enclosed color-imparting particles, wherein the particles are enclosed by a friable polymer comprising the reaction product of:
- (i) water-dispersible ethylenically unsaturated polymer;
- and
- (ii) an ethylenically unsaturated monomer.
An ink composition comprising:
- (a) a vehicle;
- and
- (b) a colorant,
- wherein the colorant comprises polymer-enclosed color-imparting particles, wherein the particles are enclosed by a friable polymer comprising the reaction product of:
- (i) a polymerizable polyester polyurethane, and
- (ii) an ethylenically unsaturated monomer.
A method for improving the transparency of an ink composition comprising a pigment colorant, comprising including in the ink composition polymer-enclosed color-imparting particles, wherein the particles are enclosed by a friable polymer comprising the reaction product of:
- (i) a water-dispersible ethylenically unsaturated polymer;
- and
- (ii) an ethylenically unsaturated monomer.
An ink composition comprising:
- (a) 0.5 to 10 percent by weight of a colorant comprising polymer-enclosed color-imparting particles, wherein the particles are enclosed by a friable polymer comprising the reaction product of:
- (i) a water-dispersible ethylenically unsaturated polymer;
- and
- (ii) an ethylenically unsaturated monomer;
- (b) 0.1 to 50 percent by weight of an organic solvent;
- (c) up to 10 percent by weight of a surfactant, and
- (d) water.
A method for making an ink composition comprising:
- (a) providing an aqueous dispersion of polymer-enclosed color-imparting particles comprising a friable polymer, wherein the aqueous dispersion is prepared by a method comprising either:
- (A) providing a mixture, in an aqueous medium, of (i) color-imparting nanoparticles, (ii) one or more polymerizable, ethylenically unsaturated monomers;
- and/or (iii) a mixture of one or more polymerizable unsaturated monomers with one or more polymers;
- and/or (iv) one or more polymers, and then subjecting the admixture to high stress shear conditions in the presence of an aqueous medium to particularize the admixture into polymer-enclosed color-imparting particles;
- or
- (B) providing a mixture, in an aqueous medium, of (i) color-imparting particles, (ii) a polymerizable ethylenically unsaturated monomer, and (iii) a water-dispersible ethylenically unsaturated polymer;
- forming the color-imparting particles into nanoparticles;
- and polymerizing the ethylenically unsaturated monomer and the ethylenically unsaturated polymer to form polymer-enclosed color-imparting particles comprising a water-dispersible polymer;
- and
- (b) combining the aqueous dispersion of polymer-enclosed color-imparting particles with other components of the ink composition.
Dependencies are inferred from the claim text.