Venable LLP
External toner additive, method for producing external toner additive, and toner
An external toner additive having a resin fine particle containing a crystalline resin and an inorganic fine particle embedded in the resin fine particle, wherein part of the inorganic fine particle is exposed on the surface of the resin fine particle, and in differential scanning calorimetry of the external toner additive, the maximum endothermic peak temperature T1 (° C.) during a first temperature increase and the maximum exothermic peak temperature T2 (° C.) during a first temperature decrease satisfy the formulae (1) to (3) below, with measurement performed between −40° C. and 150° C. at a rate of increase of 10° C./min during the first temperature increase and between 150° C. and −40° C. at a rate of decrease in temperature of 10° C./min during the first temperature decrease: T1-T2≤40.0  (1)50.0≤T1≤120.0  (2)10.0≤T2≤80.0  (3).
CANON KABUSHIKI KAISHA
G G G G G G G G G G G
G03G G03G G03G G03G G03G G03G G03G G03G G03G G03G G03G
inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional
Tatsuya Shuhei Kazumichi Katsuhisa Shuntaro Hiroki Atsuhiko
Saeki Moribe Nakahama Yamazaki Watanabe Akiyama Ohmori