Solubilized dyes for inks
AssigneeEastman Kodak Company
InventorsJoan Potenza, Marcel Madaras, Hans Schmitthenner, David Southby
Life of this patent
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Abstract
This invention relates to an ink composition comprising a dye represented by Formula I: wherein R1 is independently a non-metallic substituent; s is 0, 1, 2, 3, or 4; R2 is hydrogen or a non-metallic substituent; R3 is a substituted or unsubstituted aromatic or heterocyclic group with the proviso that if R3 is a quinoline moiety, the azo group is not bonded to the 5, 6, 7 or 8 position of the quinoline ring; wherein the dye must bear at least one ionizable group that is capable of imparting water solubility to the dye. It also relates to dyes which comprise a specific subset of the above dyes.
Claims16
An ink composition comprising a dye represented by Formula I:
- wherein
- R1 is independently a non-metallic substituent;
- s is 0, 1, 2, 3, or 4;
- R2 is hydrogen or a non-metallic substituent;
- R3 is a substituted or unsubstituted aromatic or heterocyclic group with the proviso that if R3 is a quinoline moiety, the azo group is not bonded to the 5, 6, 7 or 8 position of the quinoline ring;
- wherein the dye must bear at least one ionizable group that is capable of imparting water solubility to the dye.
A dye represented by Formula I:
- wherein
- R1 is independently a non-metallic substituent;
- s is 0, 1, 2, 3, or 4;
- R2 is hydrogen or a non-metallic substituent;
- R3 is
- R4 is independently a non-metallic substituent;
- t is 0, 1, 2, 3 or 4;
- R4a is hydrogen or a non-metallic substituent;
- and
- R5 is a hydrogen atom, a substituted or unsubstituted aryl, alkenyl, alkynyl or alkyl group, a sulfo group, a carboxyl or carboalkoxy group, a formyl group or a substituted acyl group;
- and the point of attachment to the nitrogen of the azo group is designated by:
- , with the proviso that the dye must bear at least one ionizable group that is capable of imparting water solubility.
Dependencies are inferred from the claim text.