WATER-BASED PIGMENT DISPERSION AND INK COMPOSITION USING THE SAME

PROBLEM TO BE SOLVED: To provide a water-based pigment dispersion excellent in disperse stability and heat resistance and further to provide an ink composition capable of realizing stable discharge of ink over a long period not only in piezo system, but also in thermal system in which storage stabil...

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Hauptverfasser: NOMURA HIDESHI, SHINBA MITSUYO, NAGASE AKIRA
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creator NOMURA HIDESHI
SHINBA MITSUYO
NAGASE AKIRA
description PROBLEM TO BE SOLVED: To provide a water-based pigment dispersion excellent in disperse stability and heat resistance and further to provide an ink composition capable of realizing stable discharge of ink over a long period not only in piezo system, but also in thermal system in which storage stability of ink at high temperature is required. SOLUTION: The water-based pigment dispersion comprises (A) an organic pigment, (B) a pigment derivative in which a sulfonic acid group is introduced into the organic pigment and/or a pigment derivative in which a sulfonic acid group is introduced into a pigment having the same chemical structure as a part of chemical structure which the organic pigment (A) has, (C) water and (D) a water-soluble organic solvent. In the water-based pigment, surface tension of the water-based pigment dispersion at 25°C is 25-60 mN/m and a sulfate ion concentration, contained in the water-based dispersion when concentration of a solid content composed of the organic pigment (A) and the pigment derivative (B) in the water-based pigment dispersion is 4 wt.%, is ≤50 ppm. COPYRIGHT: (C)2006,JPO&NCIPI
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subjects ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
CORRECTING FLUIDS
DYES
FILLING PASTES
INKS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
POLISHES
USE OF MATERIALS THEREFOR
WOODSTAINS
title WATER-BASED PIGMENT DISPERSION AND INK COMPOSITION USING THE SAME
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