Magenta dyes for ink-jet inks

Details Magenta dyes for ink-jet inks Magenta dyes for ink-jet inks

1997-08-29

1999-11-09

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 3157, C09D 1102

Patent

active

059806222

ABSTRACT:
A class of magenta dye chromophores generally described as metal complexes with dye ligands of 4-hydroxy-3-(2'-pyridylazo)-1-(sulfo substituted) naphthalene for use in ink-jet inks is disclosed. The dye ligands are coordinated to a polyvalent metal. The dye-metal complexes of the present invention provide excellent ink-jet prints having excellent lightfastness when exposed to direct sun light as well as office light.

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patent: 5531816 (1996-07-01), Wickramanayake
patent: 5565022 (1996-10-01), Wickramanayake

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