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Title:
MAGNETIC IRON OXIDE PARTICLE POWDER, MAGNETIC CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER AND TWO-COMPONENT SYSTEM DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2012/133645
Kind Code:
A1
Abstract:
Provided are a magnetic iron oxide particle powder having high binding property with resin, and a magnetic carrier for an electrophotographic developer in which durability is improved by increasing adhesiveness between a magnetic carrier core and a coating resin. This magnetic iron oxide particle powder in which a plurality of granules are bound has an average particle size of 0.5-30 μm, and this magnetic carrier for an electrophotographic developer comprises spherical magnetic complex particles composed of magnetic iron oxide particles dispersed in a binder resin, and uses at least the magnetic iron oxide particle powder in which a plurality of granules are bound and which has an average particle size of 0.5-30 μm.

Inventors:
HARADA SHIGENORI (JP)
UEMOTO SHINJI (JP)
MISAWA HIROMITSU (JP)
KURITA EIICHI (JP)
AOKI KOSO (JP)
Application Number:
JP2012/058351
Publication Date:
October 04, 2012
Filing Date:
March 29, 2012
Export Citation:
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Assignee:
TODA KOGYO CORP (?7390652, JP)
HARADA SHIGENORI (JP)
UEMOTO SHINJI (JP)
MISAWA HIROMITSU (JP)
KURITA EIICHI (JP)
AOKI KOSO (JP)
International Classes:
C01G49/08; G03G9/107; G03G9/113
Foreign References:
JP2003192351A2003-07-09
JP2011013676A2011-01-20
JP2009230090A2009-10-08
JPH02220068A1990-09-03
JP2009167032A2009-07-30
JP2009230090A2009-10-08
JPH08259238A1996-10-08
JP2003192351A2003-07-09
JP2003323007A2003-11-14
JP2011013676A2011-01-20
Other References:
See also references of EP 2692692A4
Attorney, Agent or Firm:
OKADA, KAZUHIKO (?1020073, JP)
Kazuhiko Okada (?1020073, JP)
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Claims: