Ink jet ink
AssigneeEastman Kodak Company
InventorsDavid Erdtmann, Alan R. Pitt, Ian M. Newington
Life of this patent
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Abstract
An ink jet ink composition comprising from about 0.5% to about 30% by weight of a pigment, a carrier and a dispersant, the dispersant comprising an anionic derivative of an ethoxylated alkylphenol-formaldehyde resin, the ratio of dispersant:pigment being from about 0.1:1 to about 5:1.
Claims15
An ink jet ink composition comprising from about 0.5% to about 30% by weight of a pigment, a carrier and a dispersant, said dispersant comprising an anionic derivative of an ethoxylated alkylphenol-formaldehyde resin, the ratio of dispersant:pigment being from about 0.1:1 to about 5:1, said anionic derivative of an ethoxylated alkylphenol-formaldehyde resin having the formula:
- wherein:
- each R independently represents a linear or branched alkyl, alkenyl, or arylalkyl group having from about 4 to about 30 carbon atoms;
- x is an integer from 0 to 20;
- y is an integer from 1 to 20;
- with the proviso that x+y is from 2 to 20;
- z is an integer from 4 to 20;
- A is an anionic group comprising sulfate, sulfonate, phosphate, phosphonate or carboxylate;
- and
- M is a cationic group.
Dependencies are inferred from the claim text.