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US 7,115,675 B2Granted
Under-/overprinting fluid component for enhancing ink stability in printing
AssigneeHewlett-Packard Development Company, L.P.
InventorDavid M. Schut
Life of this patent
Estimating the term…
Abstract
A method of improving ink stability. A block co-polymer is added to either an under-/overprinting vehicle or an ink vehicle. The polymer increases chemical interactions between the ink the print media. The under-/overprinting vehicle and the ink vehicle interact through electrostatic interactions while the polymer increases smearfastness by interacting with the print media through non-covalent interactions.
Claims12
A printing vehicle for ink-jet printing, comprising:
- a humectant;
- an anti-cockle reagent;
- a surfactant;
- a biocide;
- and
- a block co-polymer that is stable in the printing vehicle, the block co-polymer comprising:
- a first block comprising a pendant group having a hydroxyl group selected to interact with a substrate via an interaction selected from the group consisting of hydrogen bonding, pi-bond interactions, Van der Waals forces, and combinations thereof;
- and
- a second block comprising at least 6 groups including a polymer selected from the group consisting of poly (ethylene imine), methylated poly(ethylene imine), poly(diallyldimethylamino chloride), polymerized styrene maleic anhydride, and a polymer having a pendant group that includes a carboxylic acid,
- wherein the first black comprises at least 6 pendant groups.
7 more elements
Dependencies are inferred from the claim text.