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Title:
TONER PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/156232
Kind Code:
A1
Abstract:
The present invention pertains to: a toner production method whereby a toner capable of obtaining high image density can be obtained at a high yield; and a toner. The toner production method [1] includes a step in which in which resin particles and colorant particles are coagulated and fused in an aqueous medium. The resin particles contain, inside the same or different particles, crystalline polyester resin and a non-crystalline polyester resin being a polycondensate of a carboxylic component and an alcohol component including an aromatic alcohol. The colorant particles contain a colorant and an addition polymer of a raw material including an addition polymerizable monomer having an aromatic group. 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 non-crystalline polyester resin, crystalline polyester resin, an addition polymer, and a colorant. The non-crystalline polyester resin is a polycondensate of a carboxylic component and an alcohol component including an aromatic alcohol. The addition polymer is an addition polymer of a raw material including an addition polymerizable monomer having an aromatic group. 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)
Application Number:
PCT/JP2019/004696
Publication Date:
August 15, 2019
Filing Date:
February 08, 2019
Export Citation:
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Assignee:
KAO CORP (JP)
International Classes:
G03G9/08; G03G9/087; G03G9/09
Domestic Patent References:
WO2008078497A12008-07-03
Foreign References:
JP2013214029A2013-10-17
JP2010026106A2010-02-04
JP2017105952A2017-06-15
JP2014232168A2014-12-11
JP2013142873A2013-07-22
JP2006091168A2006-04-06
Other References:
See also references of EP 3748433A4
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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