WATER BASED PIGMENT DISPERSING ELEMENT FOR PREPARATION OF WATER BASED INK FOR INKJET RECORDING, AND WATER BASED INK FOR INKJET RECORDING

There is provided an ink jet recording aqueous ink exhibiting good storage stability, such as no hue change and little change in a dispersed particle size, at high temperature for a long period. An aqueous pigment dispersion used for preparing an ink jet recording aqueous ink is provided, the aqueou...

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Bibliographische Detailangaben
Hauptverfasser:	YOKOYAMA RYUUJI, OGIHARA TAKAO, YASUI KENGO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COLOUR PRINTING CORRECTING FLUIDS CORRECTION OF TYPOGRAPHICAL ERRORS DYES FILLING PASTES i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INKS LAKES LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	There is provided an ink jet recording aqueous ink exhibiting good storage stability, such as no hue change and little change in a dispersed particle size, at high temperature for a long period. An aqueous pigment dispersion used for preparing an ink jet recording aqueous ink is provided, the aqueous pigment dispersion containing an anionic group-containing organic polymeric compound, an organic pigment, an organic pigment derivative, and the water, wherein the polymeric compound, the organic pigment, and the organic pigment derivative are dispersed in water, the organic pigment and the organic pigment derivative are a diketopyrrolopyrrole-based red pigment (A) and a phthalimidoalkylated quinacridone (B), respectively, and the phthalimidoalkylated quinacridone (B) content is in the range of 1.6 to 3.8% relative to the total (100%) of the diketopyrrolopyrrole-based red pigment (A) and the phthalimidoalkylated quinacridone (B) on a mass basis. Furthermore, there is provided an ink jet recording aqueous ink containing such an aqueous pigment dispersion, wherein the aqueous pigment dispersion is diluted such that the total of the organic pigment content and the organic pigment derivative content is from 1 to 8% on a mass basis.