Zeneca Limited

Avecia Limited

Barry Huston Meyrick

Mark Holbrook

Roy Bradbury

Paul Wight

Mark Robert James

Andrew Paul Shawcross

Denise Cavanagh

Stephen G Yeates

Gavin Wright

Clive Moscrop

A composition comprising water-dissipatable polyurethane, water, colorant, a water-miscible organic solvent and a water-immiscible organic solvent. The compositions are useful as inks for ink jet printers.

Composition based on water-dissipatable polyurethane

1,3,4,-thiadiazolylazo dyes and ink compositions containing the same

Pyridonazo dyes and inks containing them

An ink composition comprising water, a water-dissipatable polyester, a disperse dye or a solvent soluble dye or a mixture of such dyes, a water-immiscible organic solvent and a water miscible organic solvent. The inks are useful in ink jet printers.

Aqueous ink compositions

Dyes of the Formula (1) and tautomers thereof:

1. An ink comprising water, a water-dissipatable polymer and a dye, wherein the dye carries a group of the Formula (1):

An ink comprising water, a water-dissipatable polymer and a dye of the Formula (1):

An ink comprising water, a water-dissipatable polymer and one or more dyes of Formula (1):

Ink compositions

An ink comprising water, a water-dissipatable polymer and one or more dyes having a benzene ring carrying a hydroxy group at each of the 1-, 3- and 5-positions and an azo group at each of the 2-, 4- and 6-positions or a tautomer thereof. Also claimed are certain dyes, compositions printer cartridges and ink jet printers.

A dye of Formula (1): ##STR1## wherein: D is a group of Formula (2): ##STR2## or a group of Formula (3): ##STR3## or a group of Formula (4): ##STR4## The variables are defined in the disclosures. The dyes and dye mixtures produce blue to green shades on synthetic textile materials such as polyester which have good build up and good light- and wet-fastness.

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Manchester, United Kingdom

Barry Huston Meyrick