CARBON BLACK DISPERSION, INK COMPOSITION, AND INKJET RECORDING METHOD

PROBLEM TO BE SOLVED: To provide an aqueous carbon black dispersion excellent in thermal storage stability.SOLUTION: This carbon black dispersion includes at least carbon black, a polymer and an aqueous medium, has viscosity of 4.0 cP or lower, and keeps its pH decremental range within 1.0 when stor...

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Bibliographische Detailangaben
Hauptverfasser:	FUJITA RIE, OGURA AI, IMAI SHINICHIRO
Format:	Patent
Sprache:	eng
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 LINING MACHINES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS 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:	PROBLEM TO BE SOLVED: To provide an aqueous carbon black dispersion excellent in thermal storage stability.SOLUTION: This carbon black dispersion includes at least carbon black, a polymer and an aqueous medium, has viscosity of 4.0 cP or lower, and keeps its pH decremental range within 1.0 when stored at 70°C for one week in a hermetically sealed state. Such the carbon black dispersion possesses better thermal storage stability compared with conventional ones. Preferably, the polymer has an acid value of ≤240 mg-KOH/g, a weight-average molecular weight of ≥15,000 and the content of components having ≤4,000 weight-average molecular weight is ≤20 wt.%.