18905604. TONER (CANON KABUSHIKI KAISHA)
TONER
Organization Name
Inventor(s)
RYUICHIRO Matsuo of Ibaraki JP
TONER
This abstract first appeared for US patent application 18905604 titled 'TONER
Original Abstract Submitted
A toner contains toner particles and an external additive on the surfaces of the toner particles. The external additive includes composite fine particles that include fine particles A containing an organosilicon compound with siloxane bonds as a binder component and fine particles B at least partially embedded in the surfaces of the fine particles A with an embedding rate of 30% to 90% on average, and fine particles C including titanium oxide or titanic acid compound fine particles and having a volume resistivity of 2.0×10to 2.0×10Ω·cm and a number average diameter of primary particles of 10 to 100 nm. The organosilicon compound contains bifunctional, trifunctional, and tetrafunctional silane monomers with specific relationships. The number average diameter X of primary particles of the composite fine particles and the number average diameter Y of primary particles of fine particles C satisfy 1.0≤X/Y≤10.0.