US 12,228,882 B2
Toner
Atsuhiko Ohmori, Kanagawa (JP); Hiroki Kagawa, Shizuoka (JP); Keisuke Adachi, Tokyo (JP); and Tomoko Sugita, Shizuoka (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 21, 2022, as Appl. No. 17/660,146.
Claims priority of application No. 2021-076193 (JP), filed on Apr. 28, 2021.
Prior Publication US 2022/0373906 A1, Nov. 24, 2022
Int. Cl. G03G 9/08 (2006.01); G03G 9/087 (2006.01); G03G 9/093 (2006.01)
CPC G03G 9/0825 (2013.01) [G03G 9/08755 (2013.01); G03G 9/09328 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A toner comprising:
a toner particle comprising a binder resin and a hydrocarbon wax; and
an inorganic fine particle, wherein
the toner comprises, as the inorganic fine particle, a silica fine particle surface-treated with
a polydimethylsiloxane represented by a following formula (A) and
a polydimethylsiloxane represented by a following formula (B);
a total amount of trimethylsilanol in terms of octamethyltrisiloxane based on the mass of the silica fine particle in organic volatile component analysis of the silica fine particle at a heating temperature of 150° C. by a headspace method is 1.0 to 5.0 ppm;
where, in a measurement of the toner particle by time-of-flight secondary ion mass spectrometry measured from the surface of the toner particle to a depth of 100 nm, a value obtained by dividing an amount of ions of a structure represented by a following formula (C) by a total amount of counted ions is taken as a standard value,
at least one peak of the standard value is present within a range of 100 nm from the surface of the toner particle;

OG Complex Work Unit Chemistry
where the maximum value among the at least one peak of the standard value is denoted by A(d max), and the standard value on the toner particle surface is denoted by A(0),
the A(d max) and the A(0) satisfy following formulas (1) and (2):

OG Complex Work Unit Chemistry
where, in the formula (B), R1 is a carbinol group, a hydroxy group, an epoxy group, a carboxy group, an alkyl group, or a hydrogen atom, and R2 is a carbinol group, a hydroxy group, an epoxy group, a carboxy group, or a hydrogen atom; n and m are average numbers of repeating units, n is 30 to 200, and m is 30 to 200; and each methyl group (—CH3) of side chains in the formula (B) may be substituted with a carbinol group, a hydroxy group, an epoxy group, a carboxy group, or a hydrogen atom.