Title:
METHOD FOR MANUFACTURING TONER
Document Type and Number:
Japanese Patent JP2020016715
Kind Code:
A
Abstract:
To provide a toner having a residue monomer reduced in the toner at high production efficiency while suppressing the adhesion of a toner precursor to a centrifuge in the concentration step and damage to the toner precursor.SOLUTION: The method of manufacturing a toner comprises: the granulation step of forming polymerizable monomer composition particles including a polymerizable monomer in an aqueous medium; the polymerization step of obtaining a toner precursor by polymerizing the polymerizable monomer included in the polymerizable monomer composition particles using at least two or more kinds of polymerization initiators; and the concentration step of increasing the solid content rate of the toner precursor in the aqueous medium. A first polymerization initiator in the polymerization initiators has a 10 hour half-life temperature of 70.0°C or more and 115.0°C or less; a second polymerization initiator has a 10 hour half-life temperature of 45.0°C or more and 65.0°C or less; the added amount of the second polymerization initiator is 2.5 mol% or more and 20.0 mol% or less to the polymerizable monomer; and the concentration step uses a centrifuge.SELECTED DRAWING: None
Inventors:
KATAYAMA KENTA
TSUJINO TAKESHI
HASHIMOTO YASUHIRO
ASAOKA JUNYA
SASANO MASARU
INOUE KOKI
TSUJINO TAKESHI
HASHIMOTO YASUHIRO
ASAOKA JUNYA
SASANO MASARU
INOUE KOKI
Application Number:
JP2018138169A
Publication Date:
January 30, 2020
Filing Date:
July 24, 2018
Export Citation:
Assignee:
CANON KK
International Classes:
G03G9/08; G03G9/087
Domestic Patent References:
| JP2005173479A | 2005-06-30 | |||
| JP2014098804A | 2014-05-29 | |||
| JP2007086457A | 2007-04-05 | |||
| JP2017031390A | 2017-02-09 | |||
| JP2010217557A | 2010-09-30 | |||
| JP2004004652A | 2004-01-08 | |||
| JP2014155893A | 2014-08-28 |
Attorney, Agent or Firm:
Yoshihiro Yamaguchi
Keisuke Watanabe
Keisuke Watanabe