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US 7,094,280 B2Granted
Water-soluble complex dye, recording fluid and recording method
AssigneeMitsubishi Chemical Corporation
InventorsWataru Shimizu, Masahiro Yamada
Life of this patent
Estimating the term…
Abstract
A water-soluble complex dye capable of forming an image having light resistance, ozone resistance and high saturation; a water-based recording fluid, particularly an ink jet recording fluid, employing such a dye; and an ink jet recording method, are presented.
Claims25
A water-soluble complex dye comprising an azo compound represented by the following formula (1) or its tautomer, and transition metal ions:
- wherein in the formula (1), A1 is a 5- to 7-membered hetero monocyclic group containing one or two hetero atoms among the ring forming atoms, or a condensed heterocyclic group containing such a hetero monocyclic group and may have an optional substituent, provided that it is a group which does not have a hydroxyl group as a substituent at a position adjacent to the carbon atom bonded to the azo group;
- ring X1 represents a condensed hetero ring containing a 6-membered hetero ring, said 6-membered hetero ring being a group bonded to the azo group, and may have an optional substituent;
- and each of R1 and R2 which are independent of each other, represents a hydrogen atom or a monovalent substituent.
A water-soluble complex dye comprising the azo dye represented by the above formula (1) or its tautomer, and transition metal ions, and represented by the following formula (5):
- wherein in the formula (5), M represents an optional transition metal ion;
- A2 is a 5- to 7-membered hetero monocyclic group containing one or two hetero atoms among the ring forming atoms, or a condensed heterocyclic group containing such a hetero monocyclic group, and may have an optional substituent, provided that it represents a group which does not have a hydroxyl group as a substituent at a position adjacent to the carbon atom bonded to the azo group;
- ring X2 represents a condensed hetero ring containing a 6-membered hetero ring, said 6-membered hetero ring being a group bonded to the azo group, and may have an optional substituent;
- and R13 represents a substituent capable of forming a coordinate bond;
- and R14 represents a hydrogen atom or a monovalent substituent.
2 more elements
Dependencies are inferred from the claim text.