Title:
METHOD FOR PRODUCING AQUEOUS PIGMENT DISPERSION
Document Type and Number:
WIPO Patent Application WO/2020/105441
Kind Code:
A1
Abstract:
The problem to be solved by the present invention is to provide a method for producing an aqueous pigment dispersion usable in ink production, the aqueous pigment dispersion having dispersion stability which can prevent coarse particles from being formed with the lapse of time and can prevent the sedimentation of, for example, a pigment, etc. from occurring with the lapse of time. The aqueous pigment dispersion further has excellent delivery stability. The present invention relates to a method for producing an aqueous pigment dispersion, characterized by kneading, under given conditions, a composition which contains a resin and one or more pigments selected from the group consisting of violet pigments, green pigments, and orange pigments and has a nonvolatile content of 50 mass% or higher and centrifuging the kneaded mixture.
Inventors:
HAYAKAWA KOHEI (JP)
SUGO KENJI (JP)
SATO YOSHIHIRO (JP)
UEDA YUTARO (JP)
OOMINATO HIROYUKI (JP)
OKADA SHINICHI (JP)
SUGO KENJI (JP)
SATO YOSHIHIRO (JP)
UEDA YUTARO (JP)
OOMINATO HIROYUKI (JP)
OKADA SHINICHI (JP)
Application Number:
PCT/JP2019/043609
Publication Date:
May 28, 2020
Filing Date:
November 07, 2019
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C09D17/00; B01F29/90; B04B1/02; B04B15/02; C09B67/46; C09D11/322
Domestic Patent References:
| WO2008015998A1 | 2008-02-07 | |||
| WO2003097753A1 | 2003-11-27 |
Foreign References:
| JP2011140646A | 2011-07-21 | |||
| JP2006233211A | 2006-09-07 | |||
| JP2008111061A | 2008-05-15 | |||
| JP2007146152A | 2007-06-14 | |||
| JP2008222980A | 2008-09-25 |
Attorney, Agent or Firm:
OGAWA Shinji (JP)
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