Title:
YELLOW TONER
Document Type and Number:
WIPO Patent Application WO/2015/122536
Kind Code:
A1
Abstract:
Provided is a yellow toner having little fogging and having a high image density as a result of having excellent pigment dispersion characteristics. This yellow toner contains at least a binder resin and a yellow pigment and is characterized by: the binder resin being a copolymer including 67%-88% by mass of a styrene-based monomer unit and 12%-33% by mass of an alkyl (meth) acrylate monomer unit; the styrene-based monomer unit relating to at least one type of monomer selected from a group comprising styrene, vinyl toluene, methyl styrene, and ethyl styrene; the alkyl (meth) acrylate monomer unit relating to at least one type of monomer selected from a group comprising methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, dimethyl aminoethyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, and dimethyl aminoethyl methacrylate; the yellow pigment content being 3-15 parts by mass relative to 100 parts by mass binder resin; and by having an interfacial tension of 5-19 mN/m against water in a liquid mixture comprising 9 parts by mass yellow pigment, 72 parts by mass styrene, and 28 parts by mass n-butyl acrylate.
Inventors:
OHTA RYUJI (JP)
Application Number:
PCT/JP2015/054296
Publication Date:
August 20, 2015
Filing Date:
February 17, 2015
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
G03G9/09; G03G9/087
Foreign References:
| JP2013113981A | 2013-06-10 | |||
| JP2011215179A | 2011-10-27 | |||
| JP2012123227A | 2012-06-28 | |||
| JP2012083644A | 2012-04-26 |
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
Kishimoto Expert (JP)
Kishimoto Expert (JP)
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