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US 6,755,903 B2Granted
Metal chelated dyestuff for inkjet recording and aqueous inkjet recording liquid using the same
AssigneeMitsubishi Chemical Corporation
InventorsMasahiro Yamada, Tomio Yoneyama, Tomohiro Chino
Life of this patent
Estimating the term…
Abstract
A metal chelated dyestuff for inkjet recording is described, which is a water soluble azo metal chelated compound formed from an azo compound represented by the following general formula (1) and a metal element and is good at the clearness of color tone, light resistance, indoor discoloring and fading property, solubility, storage stability, and the like.
Claims32
A method for ink jet recording, comprising:
- applying to or printing an object with a recording liquid composition comprising one or more metal chelated dyestuff(s), wherein said metal chelated dyestuff(s) is a water soluble azo metal chelated compound formed from an azo compound represented by the following general formula (1) and a metal element,
- where general formula (1) represents an azo dyestuff compound having at least one or more hydrophilic group in a molecule, X1 represents plural atoms required for forming at least one 5- to 7-membered heterocyclic ring, the heterocyclic ring containing X1 being a heterocyclic ring other than pyridine ring, the heterocyclic ring containing X1 may have substituent(s) on the heterocyclic ring, the substituent(s) on the heterocyclic ring may form a condensed ring through further condensation, the condensed heterocyclic ring containing X1 may be substituted, Ar1 represents naphthyl group represented by the following general formulae (2)-(4), Y1 represents a chelating group, Z1 represents any substituent which may be different from each other, and a represents an integer of 0 to 6
- wherein said one or more dyestuff(s) may be in the form of a free acid, a salt, or a mixture of a free acid and a salt.
An aqueous inkjet recording liquid composition comprising an aqueous medium and at least one metal chelated dyestuff(s)
- wherein said one or more metal chelated dyestuff(s) is a water soluble azo metal chelated compound formed from an azo compound represented by the following general formula (1) and a metal element,
- where general formula (1) represents an azo dyestuff compound having at least one or more hydrophilic group in a molecule, X1 represents plural atoms required for forming at least one 5- to 7-membered heterocyclic ring, the heterocyclic ring containing X1 being a heterocyclic ring other than pyridine ring, the heterocyclic ring containing X1 may have substituent(s) on the heterocyclic ring, the substituent(s) on the heterocyclic ring may form a condensed ring through further condensation, the condensed heterocyclic ring containing X1 may be substituted, Ar1 represents naphthyl group represented by the following general formulae (2)-(4), Y1 represents a chelating group, Z1 represents any substituent which may be different from each other, and a represents an integer of 0 to 6
Dependencies are inferred from the claim text.