Title:
TONER FOR DEVELOPMENT OF ELECTROSTATIC IMAGES
Document Type and Number:
WIPO Patent Application WO/2019/026736
Kind Code:
A1
Abstract:
Provided is a toner for the development of electrostatic images and a method for manufacturing the same, the toner having excellent printing durability in a high-temperature, high-humidity environment, and excellent transfer-amount stability on a developing roller. The toner for developing electrostatic images comprises: colored resin particles containing a binder resin, a colorant, a charge control resin, and a softener; and an external additive. The toner for developing electrostatic images is characterized in that the charge control resin is a copolymer having a composition containing a methyl methacrylate monomer unit at a content ratio of 85.0 to 99.7 mass%, a quaternary ammonium salt-containing (meth)acrylate monomer unit at a content ratio of 0.3 to 15.0 mass%, and a vinyl monomer unit other than the methyl methacrylate monomer unit and the quaternary ammonium salt-containing (meth)acrylate monomer unit at a content ratio of 0 to 14.7 mass%, wherein the charge control resin is contained in an amount of 0.2 to 4.0 parts by mass per 100 parts by mass of the binder resin.
Inventors:
HIRATA TAKESHI (JP)
Application Number:
PCT/JP2018/027970
Publication Date:
February 07, 2019
Filing Date:
July 25, 2018
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
G03G9/08; G03G9/097; G03G9/087
Foreign References:
| JP2017068013A | 2017-04-06 | |||
| JP2011123298A | 2011-06-23 | |||
| JP2006064960A | 2006-03-09 | |||
| JP2006243107A | 2006-09-14 | |||
| JPH08227174A | 1996-09-03 | |||
| JP2015172744A | 2015-10-01 | |||
| JPH05265254A | 1993-10-15 |
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
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