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US 2018/0134896 A1Published application
Cationic modified self-dispersing pigment dispersions
AssigneeE. I. Du Pont de Nemours and Company
InventorsMichael Stephen WOLFE, Charles T. BERGE, Loretta L. TAM, Cullen KIRKPATRICK
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Abstract
This invention pertains to self-dispersing pigment dispersions. The self-dispersing pigments are modified with a multivalent cation and an anionic polymer.
Claims12
An aqueous pigment dispersion comprising:
- a self-dispersing pigment having at least one type of hydrophilic functional group bonded onto a surface of the self-dispersing pigment, said at least one type of hydrophilic functional group comprising a carboxyl group;
- a multivalent cation selected from the group consisting of Mg2+, Ca2+, Cu2+, Al3+, Fe3+, and mixtures thereof, wherein said cation is adsorbed onto said self-dispersing pigment via ionic bonds between the cation and surface acid group on the self-dispersing pigment;
- and
- an anionic polymeric binder.
1 more element
Dependencies are inferred from the claim text.