Magnetic iron oxide particles, magnetic carrier for electrophotographic developers and process for producing the same, and two-component system developer
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United States of America Patent
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Sep 20, 2016
Grant Date -
Feb 20, 2014
app pub date -
Mar 29, 2012
filing date -
Mar 31, 2011
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Abstract
The present invention provides magnetic iron oxide particles having a high bonding property to a resin as well as a magnetic carrier for electrophotographic developers which is improved in durability by enhancing adhesion between a magnetic carrier core material and a coating resin. The magnetic iron oxide particles of the present invention are magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which a plurality of granules are bonded, and the magnetic carrier for electrophotographic developers according to the present invention is a magnetic carrier for electrophotographic developers which comprises spherical magnetic composite particles produced by dispersing magnetic iron oxide particles in a binder resin in which the magnetic iron oxide particles comprise at least the above magnetic iron oxide particles having an average particle diameter of 0.5 to 30 μm onto which the plurality of granules are bonded.
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