US 12,271,152 B2
Liquid electrostatic inks and methods of printing
Hodaya Keisar, Nes Ziona (IL); Albert Teishev, Nes Ziona (IL); Liora Damari, Beer Tuvia (IL); Tehila Ben-Ezra, Nes Ziona (IL); and Hanit Marom Tchaicheeyan, Nes Ziona (IL)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/437,130
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jan. 20, 2020, PCT No. PCT/US2020/014279
§ 371(c)(1), (2) Date Sep. 8, 2021,
PCT Pub. No. WO2021/150203, PCT Pub. Date Jul. 29, 2021.
Prior Publication US 2022/0146957 A1, May 12, 2022
Int. Cl. G03G 9/135 (2006.01); C09D 11/037 (2014.01); C09D 11/10 (2014.01); C09D 11/12 (2006.01)
CPC G03G 9/1355 (2013.01) [C09D 11/037 (2013.01); C09D 11/10 (2013.01); C09D 11/12 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A liquid electrostatic ink composition, comprising:
a pigment;
a carrier liquid;
a resin;
a charge director;
erucamide is present in the liquid electrostatic ink composition in an amount ranging from about 0.2 wt. % to about 4 wt. %, wherein wt. % values refer to a weight-for-weight (w/w) percentage of the erucamide in solids of the liquid electrostatic ink composition; and
a polyethylene wax is present in the electrostatic ink composition in an amount ranging from about 4 wt. % to about 6 wt. %, wherein the wt. % values refer to a w/w percentage of the polyethylene wax in the solids of the liquid electrostatic ink composition.