Title:
TONER PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/156231
Kind Code:
A1
Abstract:
Provided are a toner production method and a toner, that are capable of obtaining high image density and excellent charge stability. The toner production method [1] includes a step in which resin particles and colorant particles are coagulated and fused. The resin particles contain a composite resin including a polyester resin segment, an addition polymer resin segment being an addition polymer of a raw material monomer including a styrene compound, and a structural unit derived from a bireactive monomer having the polyester resin segment and the addition polymer resin segment bonded via a covalent bond. The colorant particles contain a colorant and an addition polymer of a raw material monomer including a styrene compound. The addition polymer includes a constituent unit derived from the styrene compound, in the main chain thereof, and the mass ratio between the colorant and the addition polymer in the colorant particles is 50/50–95/5. The toner [2] includes toner particles containing a composite resin, an addition polymer, and a colorant. The composite resin includes a polyester resin segment, an addition polymer resin segment being an addition polymer of a raw material monomer including a styrene compound, and a constituent unit derived from a bireactive monomer having the polyester resin segment and the addition polymer resin segment bonded via a covalent bond. The addition polymer is an addition polymer of a raw material monomer including a styrene compound and includes a styrene compound-derived constituent unit, in the main chain thereof. The mass ratio between the colorant and the addition polymer is 50/50–95/5.
Inventors:
MURATA SHOICHI (JP)
SUZUKI MANABU (JP)
WAKABAYASHI YUKI (JP)
SUZUKI MANABU (JP)
WAKABAYASHI YUKI (JP)
Application Number:
PCT/JP2019/004694
Publication Date:
August 15, 2019
Filing Date:
February 08, 2019
Export Citation:
Assignee:
KAO CORP (JP)
International Classes:
G03G9/08; G03G9/087; G03G9/09
Domestic Patent References:
| WO2008078497A1 | 2008-07-03 |
Foreign References:
| JP2013214029A | 2013-10-17 | |||
| JP2010026106A | 2010-02-04 | |||
| JP2017105952A | 2017-06-15 | |||
| JP2014232168A | 2014-12-11 | |||
| JP2007093809A | 2007-04-12 | |||
| JP2012027059A | 2012-02-09 | |||
| JP2006091168A | 2006-04-06 |
Other References:
See also references of EP 3751349A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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