Metal complex for ink jet ink

Claim 2

An ink jet ink composition comprising water, a humectant, and a polyvalent transition metal complex of an 8-heterocyclylazo-5-hydroxyquinoline.

Claim 3

The composition of claim 1 wherein said complex has the following structure: ##STR12## wherein: M represents a polyvalent transition metal ion; each L independently represents a neutral or anionic ligand; each X, Y and Z independently represents a substituted or unsubstituted alkyl group of 1-6 carbon atoms, a substituted or unsubstituted aryl group of 6-10 carbon atoms, a substituted or unsubstituted hetaryl group of 5-10 atoms, halogen, cyano, nitro, a substituted or unsubstituted alkoxycarbonyl group of 1-6 carbon atoms, a substituted or unsubstituted alkoxy group of 1-6 carbon atoms, hydroxy, a polyoxyalkylene group of 2-20 alkylene oxide residues, carboxy or a salt thereof, sulfo or a salt thereof, phospho or a salt thereof, carbamoyl, a substituted or unsubstituted alkyl-, aralkyl-, aryl-, diaryl- or dialkyl-carbamoyl group of 1-20 carbon atoms, sulfamoyl, a substituted or unsubstituted alkyl-, aralkyl-, aryl-, diaryl- or dialkyl-sulfamoyl group of 1-20 carbon atoms, acylamino, sulfonylamino, amino, a substituted or unsubstituted alkyl-, aralkyl-, aryl-, diaryl- or dialkyl-amino group of 1-20 carbon atoms or a quaternary ammonium or phosphonium group; Q represents the atoms necessary to complete a 5- or 6-membered heterocyclic ring; n represents 2 or 3; m represents an integer from 1-3; each p and r independently represents an integer from 0-3; q represents 0, 1 or 2; two or more of L may be joined together to form a bi- or tridentate ligand which may optionally comprise another polydentate molecule of the same or different structure as shown above; one or more of L may be combined with X and/or Z; one or more of X, Y and Z, together with the carbon to which they are attached, may independently represent a ring nitrogen; and any two of X, Y or Z may be joined together to form a 5-7 membered saturated or unsaturated ring.

Claim 4

The composition of claim 2 wherein M is Ni 2+ .

Claim 5

The composition of claim 2 wherein L m comprises an 8-heterocyclylazo-5-hydroxyquinoline.

Claim 6

The composition of claim 1 wherein said composition also contains a water-miscible organic solvent.

Claim 7

The composition of claim 2 wherein X is chloro, methyl, alkoxy or carboxy.

Claim 8

The composition of claim 2 wherein Y is hydrogen.

Claim 9

The composition of claim 2 wherein Z is hydrogen or alkylsulfamoyl.

Claim 10

The composition of claim 2 wherein Q represents the atoms necessary to complete a pyridine ring.

Claim 11

The composition of claim 1 wherein said humectant is diethylene glycol, glycerol or diethylene glycol monobutylether.

Claim 12

The composition of claim 1 wherein said metal complex comprises about 0.05 to about 5% by weight of said ink jet ink composition.