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US 6,685,769 B1Granted
Aqueous carbon black dispersions
AssigneeDegussa-Huls AG
InventorsAlfons Karl, Horst Kleinhenz, Werner Kalbitz, Gerd Tauber, Andreas Stübbe, Johann Mathias
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Abstract
Aqueous carbon black dispersions contain carbon black and cationic and non-ionic surfactants in addition to water. The dispersions are produced by dispersing the carbon black and the other components in water with bead mills, ultrasonic mills or an Ultra Turrax mixer. The dispersions can be used to produce inks, lacquers and printing inks.
Claims13
An aqueous carbon black dispersion comprising:
- 5% to 97.5% by weight of water,
- 1% to 45% by weight of carbon black,
- 1% to 40% by weight of cationic surfactant, and
- 0.5% to 10% by weight of non-ionic surfactant,
- wherein the cationic surfactant is
- wherein
- R1—CO— represents a ricinoleic acid moiety,
- R2, R3, R4 may be identical or different substituents and are selected from the group consisting of C1 to C5 alkyl groups and
- R5 represents C1 to C5 alkyl groups, and
- n represents a natural number 1-5.
7 more elements
Dependencies are inferred from the claim text.