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Title:
TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPING
Document Type and Number:
WIPO Patent Application WO/2018/003749
Kind Code:
A1
Abstract:
Provided is a toner for electrostatic charge image developing, with which toner blow-off is unlikely to occur and which has excellent printing durability. This toner for electrostatic charge image developing contains: coloring resin particles, which comprise a binder resin, a coloring agent and a charge control agent; and external additives. The toner is characterized in that: the toner contains, as the external additives, at least an external additive A and an external additive B; the external additive A is silica particles which have a specified number average particle diameter and the surface of which is subjected to a hydrophobic treatment using a specified hydrophobic treatment agent; the external additive B is silicone resin particles which have a specified number average particle diameter and for which the ratio (BS/TS) of the BET specific surface area (BS) relative to the theoretical specific surface area (TS) falls within the range 3.0-30.0; and the content of external additive A and that of external additive B fall within specified ranges relative to the binder resin particles.

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Inventors:
CHIBA TAKERU (JP)
YAGYU SAKYO (JP)
Application Number:
PCT/JP2017/023426
Publication Date:
January 04, 2018
Filing Date:
June 26, 2017
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
G03G9/08; G03G9/097
Domestic Patent References:
WO2015107961A12015-07-23
Foreign References:
JPH0792722A1995-04-07
JP2013140235A2013-07-18
JP2017122873A2017-07-13
JPH10186710A1998-07-14
JPH07114213A1995-05-02
JP2013140235A2013-07-18
JPS6360458A1988-03-16
JPH03175456A1991-07-30
JPH03243954A1991-10-30
JPH1115192A1999-01-22
JPH01217464A1989-08-31
JPH0315858A1991-01-24
Other References:
See also references of EP 3480661A4
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
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