Title:
TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE
Document Type and Number:
Japanese Patent JP3733235
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a toner for developing an electrostatic charge image having stable transferability over a long period of time even in a low or high humidity environment.
SOLUTION: This toner contains at least a bonding resin and magnetic iron oxide contg., based on iron element, 0.2-4.0 wt.% at least one metallic element selected from the group comprising Mn, Zn, Ni, Cu, Co, Cr, Cd, Al, Sn and Mg and 0.2-0.8 wt.% silicon element. The ratio [(BSi/ASi)×100] of the content BSi of silicon element present in a part of the iron oxide with up to 20 wt.% solution rate of iron element to the content ASi of all silicon element present in the iron oxide is 45-85% and the ratio [(CSi/ASi)×100] of the content CSi of silicon element present in a part of the iron oxide with up to 10 wt.% solution rate of iron element to the content ASi is 35-70%. The bonding resin contains at least the reaction product of a vinyl copolymer with a polyester resin.
Inventors:
Yoshihiro Ogawa
Koichi Tomiyama
Keita Nozawa
Koichi Tomiyama
Keita Nozawa
Application Number:
JP5493198A
Publication Date:
January 11, 2006
Filing Date:
March 06, 1998
Export Citation:
Assignee:
Canon Inc
International Classes:
G03G9/083; G03G9/087; (IPC1-7): G03G9/083; G03G9/087
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Attorney, Agent or Firm:
Keisuke Watanabe