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US 9,175,181 B2Granted
Thermal inkjet latex inks
AssigneeHewlett-Packard Development Company, L.P.
InventorsThomas W. Butler, Andre Garcia, Rodney D. Stramel
Life of this patent
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Abstract
In one example, an anti-fouling latex ink includes a liquid vehicle, a pigment dispersed in the liquid vehicle, latex dispersed in the liquid vehicle, and a polystyrene anti-fouling additive dispersed in the liquid vehicle as a free solution. An illustrative method of formulating a latex inkjet ink includes forming a liquid vehicle with water as primary solvent, dispersing pigments in the liquid vehicle, and adding 0.01 wt % to 1 wt % of a polystyrene antifouling additive as a free solution to the liquid vehicle.
Claims13
A thermal inkjet latex ink comprising:
- a liquid vehicle;
- pigment dispersed in the liquid vehicle;
- latex dispersed in the liquid vehicle;
- and
- a styrene polymer based anti-fouling additive dispersed in the liquid vehicle as a free solution, wherein the anti-fouling additive is a copolymer of styrene, alpha methyl styrene, and acrylic acid having a molecular weight of approximately 8,000, an acid number of approximately 150-160 mg of KOH/g of resin, and a glass transition temperature of approximately 74° C.
2 more elements
Dependencies are inferred from the claim text.