Yellow dyes for ink jet inks

Details Yellow dyes for ink jet inks Yellow dyes for ink jet inks

2006-10-24

2006-10-24

Klemanski, Helene (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031480, C106S031580

Reexamination Certificate

active

07125446

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:R1and R5independently are hydrogen or a substituted or unsubstituted alkyl, aromatic or heterocyclic group;R2and R4independently are hydrogen or a non-metallic substituent;R3is 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, R4and R5comprises a group capable of imparting water solubility to the dye.

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