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US 10,591,839 B2Granted
Liquid electrophotographic ink composition
AssigneeHP Indigo B.V.
InventorsGil Bar-Haim, Shiran Zabar, Danny Feldman, Alina Grishman, Albert Teishev
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Abstract
Herein is described a liquid electrostatic ink composition comprising a carrier liquid, a resin, a colorant selected from a magenta colorant, a cyan colorant and a black colorant, an amine-containing basic dispersant having a total base number (TBN) in the range of about 10 to about 65 mgKOH/g material, the amine-containing basic dispersant present in an amount from about 5 wt. % to about 40 wt. % by total weight of colorant.
Claims6
A method of producing a liquid electrophotographic (LEP) ink composition, the method comprising:
- first combining:
- a colorant selected from the group consisting of a magenta colorant, a cyan colorant and a black colorant, and wherein the colorant is selected from the group consisting of diketopyrrolopyrrole, perinone, phthalein, pyranthrone, pyrazoloquinazolinone, pyrroledione, and benzimidazolone;
- and
- an amine-containing basic dispersant having a total base number (TBN) in the range of about 10 to about 65 mgKOH/g material, the amine-containing basic dispersant present in an amount from about 5 wt. % to about 40 wt. % by total weight of colorant,
- to form colorant particles comprising the combined colorant and basic dispersant;
- and
- grinding a resin and the colorant particles in the presence of a carrier liquid.
4 more elements
Dependencies are inferred from the claim text.