Pigment dispersions with polymeric dispersants having pending chromophore groups
AssigneeAgfa Graphics NV
InventorsWojciech Jaunky, Geert Deroover, Johan Loccufier, Lambertus Groenendaal
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Abstract
A pigment dispersion includes a color pigment represented by formula (I): wherein R1 to R10 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF3, —COOH, —COOCH3, —SO2NH—C6H5, —CONH—C6H5, —CONH—C6H5—CONH2, and —CONH2; and a polymeric dispersant, having via a linking group covalently linked to its polymeric backbone, at least one pending chromophore group which has a molecular weight smaller than 95% of the molecular weight of said color pigment. The pigment dispersion can be advantageously used in inkjet inks.
Claims14
A pigment dispersion comprising:
- a color pigment represented by formula (I):
- and
- a polymeric dispersant having, via a linking group covalently linked to its polymeric backbone, at least one pending chromophore group which has a molecular weight smaller than 95% of the molecular weight of the color pigment;
- wherein
- R1 to R10 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF3, —COOH, —COOCH3, —SO2NH—C6H5, —CONH—C6H5, —CONH—C6H5—CONH2, and —CONH2;
- and
- the pigment dispersion is an inkjet ink and the pigment comprises 0.1 wt % to 20 wt % of the inkjet ink based on a total weight of the inkjet ink.
Dependencies are inferred from the claim text.