Electrostatic ink compositions
AssigneeHewlett-Parkard Indigo B.V.
InventorsEmad Masoud, Yael Kowal-Blau, Albert Teishev, Nurit Carmel-Barnea
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Abstract
Herein is disclosed an electrostatic ink composition comprising: a) chargeable particles comprising a resin; b) a charge director comprising a sulfosuccinate salt of the general formula M′Am, wherein M′ is a metal, m is the valence of M′, and A is an ion of the general formula (I): (I) [R3—O—C(O)CH2CH(SO3)C(O)—O—R4]− wherein each of R3 and R4 is an alkyl group; and c) an optionally substituted naphthalene-sulfonate moiety. Also disclosed is a method of manufacturing an electrostatic ink composition and a printed medium having printed thereon an electrostatic ink composition.
Claims11
An electrostatic ink composition comprising:
- a) chargeable particles comprising a resin;
- b) a charge director comprising a sulfosuccinate salt of the general formula M′Am, wherein M′ is a metal, m is the valence of M′, and A is an ion of the general formula (I):
- [R3—O—C(O)CH2CH(SO3)C(O)—O—R4]− (I)
- wherein each of R3 and R4 is an alkyl group;
- and
- c) an optionally substituted naphthalene-sulfonate moiety shown in formula (III) below
- wherein
- R1 and R2 are each independently selected from the group consisting of hydrogen, optionally substituted alkyl, halogen, nitro, cyano, hydroxy, optionally substituted alkoxy, optionally substituted amino, alkoxycarbonyl, optionally substituted alkylcarbonyloxy, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkoxy, optionally substituted acyl, and optionally substituted aminocarbonyl,
- M is selected from the group consisting of H, a metal, and NH4, and
- n is the valence of M.
A print substrate having printed thereon an electrostatic ink composition comprising:
- a) a resin;
- b) a charge director comprising a sulfosuccinate salt of the general formula M′Am, wherein M′ is a metal, m is the valence of M′, and A is an ion of the general formula (I):
- [R3—O—C(O)CH2CH(SO3)C(O)—O—R4]− (I)
- wherein each of R3 and R4 is an alkyl group;
- and
- c) an optionally substituted naphthalene-sulfonate moiety shown in formula (III) below
- wherein R1 and R2 are each independently selected from the group consisting of hydrogen, optionally substituted alkyl, halogen, nitro, cyano, hydroxy, optionally substituted alkoxy, optionally substituted amino, alkoxycarbonyl, optionally substituted alkylcarbonyloxy, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkoxy, optionally substituted acyl, and optionally substituted aminocarbonyl,
- M is selected from the group consisting of H, a metal, and NH4, and
- n is the valence of M.
Dependencies are inferred from the claim text.