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US 12,460,096 B2Granted
Over-print varnish formulation
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlex Trubnikov, Mazi Bar, Eytan Cohen, Kfir Dar, Kobi Cohen
Life of this patent
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Abstract
An over-print varnish formulation is described. The formulation comprises a non-ionic polyurethane dispersion; a water-soluble polymer of Mw less than 55,000; a wax having a particle size (d50) 200 nm or less; and a water-soluble solvent, and at least 20 wt % solids, based on the total weight of the formulation. A method of printing using the formulation, and a printed article are also described.
Claims14
An over-print varnish formulation, comprising:
- a non-ionic polyurethane dispersion including a non-ionic polyurethane selected from the group consisting of an aromatic polyether polyurethane, an aliphatic polyether polyurethane, an aromatic polyester polyurethane, an aliphatic polyester polyurethane, an aromatic polycaprolactam polyurethane, an aliphatic polycaprolactam polyurethane, a vinyl-urethane hybrid polymer, an acrylic-urethane hybrid polymer, a co-polymer thereof, and a combination thereof;
- a water-soluble polymer of Mw less than 55,000, wherein the water-soluble polymer is a cationic polymer selected from the group consisting of a quaternary amine, a polyguanidine cationic polymer, a water-soluble cationic dendrimer, a polyallylamine, a poly diallyl dimethyl ammonium chloride, or a polyvinyl pyrrolidone, and combinations thereof;
- a wax having a particle size (d50) 200 nm or less;
- and
- a water-soluble solvent,
- wherein the formulation comprises at least 20 wt % solids, based on the total weight of the formulation.
3 more elements
A method of printing, comprising:
- applying a fixer composition onto a substrate;
- applying an ink composition onto the fixer composition;
- and
- applying an over-print varnish formulation onto the ink composition prior to drying the ink composition, wherein the over-print varnish formulation comprises:
- a non-ionic polyurethane dispersion including a non-ionic polyurethane selected from the group consisting of an aromatic polyether polyurethane, an aliphatic polyether polyurethane, an aromatic polyester polyurethane, an aliphatic polyester polyurethane, an aromatic polycaprolactam polyurethane, an aliphatic polycaprolactam polyurethane, a vinyl-urethane hybrid polymer, an acrylic-urethane hybrid polymer, a co-polymer thereof, and a combination thereof;
- a water-soluble polymer of Mw less than 55,000, wherein the water-soluble polymer is a cationic polymer selected from the group consisting of a quaternary amine, a polyguanidine cationic polymer, a water-soluble cationic dendrimer, a polyallylamine, a poly diallyl dimethyl ammonium chloride, or a polyvinyl pyrrolidone, and combinations thereof;
- a wax having a particle size (d50) 200 nm or less;
- a water-soluble solvent;
- and
- at least 20 wt % solids, based on the total weight of the formulation.
7 more elements
A printed article, comprising:
- a substrate;
- a fixer composition disposed on the substrate;
- an ink composition disposed on the fixer composition;
- and
- an over-print varnish formulation disposed on the ink composition, wherein the over-print varnish formulation comprises:
- a non-ionic polyurethane dispersion including a non-ionic polyurethane selected from the group consisting of an aromatic polyether polyurethane, an aliphatic polyether polyurethane, an aromatic polyester polyurethane, an aliphatic polyester polyurethane, an aromatic polycaprolactam polyurethane, an aliphatic polycaprolactam polyurethane, a vinyl-urethane hybrid polymer, an acrylic-urethane hybrid polymer, a co-polymer thereof, and a combination thereof;
- a water-soluble polymer of Mw less than 55,000, wherein the water-soluble polymer is a cationic polymer selected from the group consisting of a quaternary amine, a polyquanidine cationic polymer, a water-soluble cationic dendrimer, a polyallylamine, a poly diallyl dimethyl ammonium chloride, or a polyvinyl pyrrolidone, and combinations thereof;
- and
- a wax having a particle size (d50) 200 nm or less.
6 more elements
Dependencies are inferred from the claim text.