AQUEOUS PIGMENT DISPERSION FOR USE IN WATER-BASED INK FOR INKJET RECORDING, WATER-BASED INK FOR INKJET RECORDING, AND WATER-BASED INK SET

WIPO Patent Application WO/2012/176255

A1

Provided is an aqueous pigment dispersion for use in a water-based ink for inkjet recording, said pigment dispersion enabling the formation of recorded color images with excellent color development and light fastness and ensuring excellent ejection durability. Also provided are a water-based ink for inkjet recording and a water-based ink set comprising the water-based ink and a polyvalent metal salt solution. An aqueous pigment dispersion for use in a water-based ink for inkjet recording, characterized by comprising two aqueous pigment dispersions, namely, an aqueous pigment dispersion of (A) an organic pigment and (B) an organic high-molecular compound having an anionic group in (C) an aqueous medium, wherein the organic pigment (A) is a red pigment consisting of a disubstituted quinacridone, and an aqueous pigment dispersion as described above, wherein the organic pigment (A) is C.I. Pigment red 269; a water-based ink for inkjet recording, containing the aqueous pigment dispersion for use in a water-based ink for inkjet recording; and a water-based ink set for inkjet recording, comprising a polyvalent metal salt solution and the water-based ink for inkjet recording.

ARAI MASAMITSU (JP)
YASUI KENGO (JP)
ENOMOTO YUUYA (JP)
SEKI TOSHIHIRO (JP)

PCT/JP2011/064029

December 27, 2012

June 20, 2011

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DAINIPPON INK & CHEMICALS (JP)
ARAI MASAMITSU (JP)
YASUI KENGO (JP)
ENOMOTO YUUYA (JP)
SEKI TOSHIHIRO (JP)

C09D11/00; C09B67/20

JP2001002962A	2001-01-09
JP2000181144A	2000-06-30
JP2011089077A	2011-05-06
JP2004123866A	2004-04-22

KONO MICHIHIRO (JP)
Michihiro Kono (JP)

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