Pigment-based non-aqueous ink-jet inks free of hazardous air polluting solvents
AssigneeHewlett-Packard Development Company, L.P.
InventorsEfrat Soroker, Richard Power, Eytan Cohen, James Lowndes, Amir Shapira, Benjamin Dayan
Life of this patent
Estimating the term…
Abstract
The present invention is drawn to ink compositions and methods for ink-jet recording. The ink compositions can include a non-aqueous HAPS-free solvent system; a binder system, including at least one of i) an acrylic resin, or ii) a first vinyl chloride-vinyl acetate resin, which is at least substantially soluble in the solvent system; and a pigment milled in the presence of a second vinyl chloride-vinyl acetate resin. Further, at least one solvent of the solvent system can serve as a dispersing and diluent solvent for the pigment.
Claims47
An ink composition for ink-jet recording, comprising:
- a non-aqueous HAPS-free solvent system;
- a binder system, including at least one of i) an acrylic resin, or ii) a first vinyl chloride-vinyl acetate resin, said binder system being at least substantially soluble in the solvent system;
- a pigment milled in presence of a second vinyl chloride-vinyl acetate resin and at least one solvent of said solvent system;
- and
- a solvent soluble dispersant including an ethoxylated-polyurethane block copolymer with aromatic side chains.
A method of printing an image, comprising ink-jetting an ink composition onto a media substrate, said ink composition comprising:
- a) a non-aqueous HAPS-free solvent system;
- b) a binder system, including at least one of i) an acrylic resin, or ii) a first vinyl chloride-vinyl acetate resin, said binder system being at least substantially soluble in the solvent system;
- c) a pigment milled in presence of a second vinyl chloride-vinyl acetate resin and at least one solvent of said solvent system;
- and
- d) a solvent soluble dispersant including an ethoxylated-polyurethane block copolymer with aromatic side chains.
An ink composition for ink-jet recording, comprising:
- a non-aqueous HAPS-free solvent system;
- a binder system, including at least one of i) an acrylic resin, or ii) a first vinyl chloride-vinyl acetate resin, said binder system being at least substantially soluble in the solvent system;
- a pigment milled in presence of a second vinyl chloride-vinyl acetate resin,, at least one solvent of said solvent system, and at least one predominantly S-chiral of N-propyl lactate or predominantly S-chiral ethylhexyl lactate.
A method of printing an image, comprising ink-jetting an ink composition onto a media substrate, said ink composition comprising:
- a) a non-aqueous HAPS-free solvent system;
- b) a binder system, including at least one of i) an acrylic resin, or ii) a first vinyl chloride-vinyl acetate resin, said binder system being at least substantially soluble in the solvent system;
- c) a pigment milled in presence of a second vinyl chloride-vinyl acetate resin, at least one solvent of said solvent system, and at least one predominantly S-chiral N-propyl lactate or predominantly S-chiral ethylhexyl lactate.
Dependencies are inferred from the claim text.