Yellow dyes for ink jet inks
AssigneeEastman Kodak Company
InventorsJoan C. Potenza, Steven Evans, Ellen J. Pyszczek
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Abstract
This invention relates to a yellow ink composition for ink jet printing comprising a dye represented by Formula I, water and a humectant: wherein: R1 and R5 independently are hydrogen or a substituted or unsubstituted alkyl, aromatic or heterocyclic group; R2 and R4 independently are hydrogen or a non-metallic substituent; R3 is hydrogen or a substituted or unsubstituted alkyl, acyl, sulfonyl, aromatic or heterocyclic group; and X is an electron withdrawing group; with the proviso at least one of R1, R2, R3, R4 and R5 comprises a group capable of imparting water solubility to the dye.
Claims29
A yellow ink jet ink composition for ink jet printing comprising a dye represented by Formula I, water and a humectant:
- wherein:
- R1 is a hydrogen or a substituted or unsubstituted alkyl, aromatic or heterocyclic group;
- R2 and R4 independently hydrogen or a non-metallic substituent;
- R3 is hydrogen or a substituted or unsubstituted alkyl, acyl, sulfonyl, aromatic or heterocyclic group;
- R5 is a substituted or unsubstituted alkyl, aromatic or heterocyclic group;
- and
- X is an electron withdrawing group having a Hammet σp value of 0.4 or greater;
- with the proviso at least one of R1, R2, R3, R4 and R5 comprises a group capable of imparting water solubility to the dye.
Dependencies are inferred from the claim text.