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US 2007/0179213 A1Published application
Inkjet ink compositions comprising polymeric dispersants having attached chromophore groups
AssigneeCabot Corporation
InventorsAlexander I. Shakhnovich, Darryl S. Williams, Joseph B. Carroll
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Abstract
The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric group and at least one group having the formula -A′-(B)y(C)z, wherein A and A′ are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.
Claims32
An inkjet ink composition comprising:
- a) a liquid vehicle;
- b) a pigment comprising a colorant having the formula A-(B)x;
- and
- c) a polymeric dispersant comprising a polymeric group and at least one group having the formula -A′-(B)y(C)z,
- wherein A and A′ are organic chromophore groups;
- B, which can be the same or different when x or y>1, is a substituent on A and A′;
- C, which can be the same or different when z>1, is a substituent on A′ and is different than B;
- x, y and z are 0, 1, 2, 3, or 4;
- and y is less than or equal to x;
- and
- wherein A and A′ are the same.
8 more elements
Dependencies are inferred from the claim text.