Title:
顔料水分散液の製造方法
Document Type and Number:
Japanese Patent JP7141791
Kind Code:
B2
Abstract:
The present invention relates to [1] a process for producing a pigment water dispersion liquid of polymer particles containing an azomethine metal complex pigment (A), said process including the step of subjecting a mixture containing the azomethine metal complex pigment (A), an uncrosslinked aromatic group-containing polymer (b) and water to dispersion treatment using a medialess disperser at an accumulated input energy of not more than 5.0 kWh/kg, [2] a pigment water dispersion liquid containing an azomethine metal complex pigment (A) and a polymer dispersant (B), in which in an optical absorption spectrum of the pigment water dispersion liquid, a ratio of a maximum absorbance (A1max) in a wavelength range of not less than 440 nm and less than 465 nm to a maximum absorbance (A2max) in a wavelength range of not less than 420 nm and less than 440 nm [(A1max)/(A2max)] is not less than 1.000, and [3] a water-based ink for ink-jet printing, containing the aforementioned pigment water dispersion liquid.
Inventors:
Mitsuyoshi Kaname
Egawa Tsuyoshi
Tomohiko Nagano
Yusuke Shimizu
Egawa Tsuyoshi
Tomohiko Nagano
Yusuke Shimizu
Application Number:
JP2017252515A
Publication Date:
September 26, 2022
Filing Date:
December 27, 2017
Export Citation:
Assignee:
Kao Corporation
International Classes:
C09D17/00; B41J2/01; B41M5/00; C09B67/04; C09B67/08; C09B67/20; C09B67/46; C09D11/322; C09D11/326
Domestic Patent References:
| JP2016121237A | ||||
| JP2003055590A | ||||
| JP2007187890A | ||||
| JP2016124969A | ||||
| JP2014056079A | ||||
| JP2016166326A |
Foreign References:
| WO2003081298A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Otani Patent Office
Wataru Sasaki
Wataru Sasaki