Title:
AZO PIGMENT, INK, PAINT, COLORANT FOR PLASTIC, COLORED MOLDED PRODUCT, COLORANT FOR STATIONERY/WRITING INSTRUMENT, PRINTING AGENT, TONER, DISPERSION/RESIST FOR COLOR FILTER, RESIST, AND COSMETIC
Document Type and Number:
WIPO Patent Application WO/2022/176337
Kind Code:
A1
Abstract:
The problem to be solved by the present invention is to provide a low-viscosity azo pigment, ink, and the like, having superior transparency and good dispersibility. An azo pigment according to the present invention has a zeta potential in isopropanol (IPA) of −80 mV to −30 mV. The azo pigment preferably contains 0.05 to 2.00 parts by mass of an elemental metal per 100 parts by mass of the azo pigment. The elemental metal is preferably elemental iron. The ratio (Fe/C) of elemental iron concentration Fe (atomic%) on azo pigment particle surfaces and elemental carbon concentration C (atomic%) on azo pigment particle surfaces according to X-ray photoelectron spectroscopy is preferably 0.20 or less.
Inventors:
YAMADA SHOGO (JP)
YOSHIDA TAKUYA (JP)
KIMURA AKIRA (JP)
YOSHIDA TAKUYA (JP)
KIMURA AKIRA (JP)
Application Number:
PCT/JP2021/045264
Publication Date:
August 25, 2022
Filing Date:
December 09, 2021
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C09B29/01; C09B29/20; C09B33/044; C09B35/10; C09B67/08; C09B67/20; C09D11/037
Domestic Patent References:
| WO2019180955A1 | 2019-09-26 |
Foreign References:
| JP2002020673A | 2002-01-23 | |||
| JP2016041785A | 2016-03-31 | |||
| JP2003096349A | 2003-04-03 | |||
| JP2008069355A | 2008-03-27 | |||
| JPH06136287A | 1994-05-17 | |||
| JP2003201419A | 2003-07-18 |
Attorney, Agent or Firm:
OGAWA Shinji (JP)
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