Title:
着色微粒子分散体の製造方法
Document Type and Number:
Japanese Patent JP6589236
Kind Code:
B2
Abstract:
The present invention provides a process for producing a colored fine particle dispersion suitably used in a water-based ink for ink-jet printing which can be produced by an emulsion polymerization method even when using a pigment having a quinacridone skeleton, is excellent in storage stability, and can provide printed characters or images having excellent rub fastness when printed on a recording medium; the colored fine particle dispersion; and a process for producing a water-based ink for ink-jet printing which includes the colored fine particle dispersion. The present invention relates to [1] a process for producing a colored fine particle dispersion including the step of subjecting a dispersion including a pigment, a polymerizable monomer, a surfactant, a polymerization initiator and water to emulsion polymerization, the pigment being a pigment having a quinacridone skeleton; the surfactant being an anionic or nonionic surfactant; and the polymerization initiator including an anionic or nonionic azo-based compound, [2] a colored fine particle dispersion including colored fine particles having an average particle size of not less than 10 nm and not more than 300 nm, and [3] a process for producing a water-based ink for ink-jet printing, including the step of mixing the obtained colored fine particle dispersion and an organic solvent B.
Inventors:
Matsumoto Yudai
Application Number:
JP2015133100A
Publication Date:
October 16, 2019
Filing Date:
July 01, 2015
Export Citation:
Assignee:
Kao Corporation
International Classes:
C09B67/20; B41J2/01; B41M5/00; C09B48/00; C09B67/08; C09D11/322; C09D17/00
Domestic Patent References:
| JP2007534810A | ||||
| JP2004155818A | ||||
| JP2007197525A | ||||
| JP2002338859A | ||||
| JP2006008734A | ||||
| JP2003306611A |
Foreign References:
| WO2001008895A1 |
Attorney, Agent or Firm:
Tamotsu Otani
Makoto Kataoka
Makoto Kataoka