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US 10,947,400 B2Granted
Inkjet inks
AssigneeHewlett-Packard Development Company, L.P.
InventorsMax Yen, Or Brandstein
Life of this patent
Estimating the term…
Abstract
An inkjet ink can include an ink vehicle and ink solids carried by the ink vehicle. The ink solids can include a pigment, 5 wt % to 40 wt % polymeric binder, and 0.3 wt % to 3 wt % wax. The wax can have a melting point of from 90° C. to 115° C. and an average particle size of from 0.1 μm to 0.5 μm. Further, the wax can include wax particles having a particle size greater than 1 μm but which are present at a quantity no greater than 0.1% of the total number of wax particles based on particle count.
Claims20
An inkjet ink, comprising:
- an ink vehicle;
- and
- ink solids carried by the ink vehicle, said ink solids comprising:
- a pigment;
- 0.5 wt % to 15 wt % polymeric binder;
- and
- 0.3 wt % to 3 wt % wax having a melting point of from 90° C. to 115° C., an average particle size of from 0.1 μm to 0.5 μm, and comprising wax particles having a particle size greater than 1 μm in a quantity no greater than 0.1% of the total number of wax particles, wherein the wax is obtained from a centrifuged wax emulsion.
4 more elements
A method of preparing an inkjet ink, comprising:
- preparing a wax emulsion;
- centrifuging the wax emulsion to selectively settle particles to form a gradient wax emulsion having a low-average-particle-size fraction and a high-average-particle-size fraction;
- and
- formulating an inkjet ink, comprising:
- an ink vehicle;
- a pigment;
- a polymeric binder;
- and
- wax solids obtained from the low-average-particle-size fraction of the gradient wax emulsion to provide a wax solids content of from 0.3 wt % to 3 wt % in the inkjet ink.
6 more elements
Dependencies are inferred from the claim text.