	US 12,443,120 B2
	Toner
Yoshitaka Suzumura, Shizuoka (JP); and Tomoko Sugita, Shizuoka (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 14, 2022, as Appl. No. 17/812,536.
Claims priority of application No. 2021-120734 (JP), filed on Jul. 21, 2021.
Prior Publication US 2023/0037779 A1, Feb. 9, 2023
Int. Cl. G03G 9/097 (2006.01); G03G 9/08 (2006.01)

CPC G03G 9/09716 (2013.01) [G03G 9/0819 (2013.01); G03G 9/09725 (2013.01)]

9 Claims

1. A toner, comprising:

a toner particle; and

an external additive on a surface of the toner particle, the external additive comprising an agglomerate of fine silica particles surface-treated with silicone oil, wherein

Rb is 12 to 80 nm when Rb is a number-average particle diameter of the agglomerate of the fine silica particles,

A is 120 to 300 when A is an integrated value of a D unit obtained when an integrated value of a Q unit is set to 100 in a CP/MAS measurement in a ²⁹Si-solid-state NMR of the fine silica particles, and

the agglomerate of the fine silica particles has a coefficient of variation of particle diameters of 1.00 to 3.00, based on a number of the agglomerate of the fine silica particles.