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Patent Searching and Data


Title:
ELECTROSTATIC-CHARGED IMAGE DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2014/132900
Kind Code:
A1
Abstract:
Provided is an electrostatic-charged image developer that is capable of suppressing fogging in both a high-temperature, high-humidity environment and a low-temperature, low-humidity environment; and is capable of maintaining a toner transfer quantity close to that at initial printing, even after continuous printing, while maintaining excellent low temperature fixing performance. The electrostatic-charged image developer contains colored resin particles containing a binder resin and a colorant, and an external additive, and is characterized in that: the external additive contains plate-like zinc oxide microparticles having an average long diameter of 50 to 2,000 nm, and a value, S, obtained by dividing the average thickness (d) of particles by the average area (A) of the base of the particles, is 0.0001 to 0.03 nm-1; and the content of the plate-like zinc oxide microparticles is 0.05 to 1 parts by mass per 100 parts by mass of the colored resin particles.

Inventors:
CHIBA TAKERU (JP)
NAKATANI HIROSHI (JP)
Application Number:
PCT/JP2014/054224
Publication Date:
September 04, 2014
Filing Date:
February 21, 2014
Export Citation:
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Assignee:
ZEON CORP (JP)
International Classes:
G03G9/08; G03G9/097
Domestic Patent References:
WO2012147886A12012-11-01
Foreign References:
JPH05119515A1993-05-18
JPH1048873A1998-02-20
JPH01273056A1989-10-31
JPH04124678A1992-04-24
JP2011203666A2011-10-13
JP2006072121A2006-03-16
JP2011128406A2011-06-30
JP2008096883A2008-04-24
JP2006201551A2006-08-03
JPH0611884A1994-01-21
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
Kishimoto Expert (JP)
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