US 12,242,226 B2
Toner
Keisuke Adachi, Tokyo (JP); Takayuki Toyoda, Shizuoka (JP); Atsuhiko Ohmori, Kanagawa (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. 17/660,138.
Claims priority of application No. 2021-076275 (JP), filed on Apr. 28, 2021.
Prior Publication US 2022/0373916 A1, Nov. 24, 2022
Int. Cl. G03G 9/097 (2006.01); G03G 9/08 (2006.01); G03G 9/087 (2006.01)
CPC G03G 9/09716 (2013.01) [G03G 9/0819 (2013.01); G03G 9/08755 (2013.01); G03G 9/09725 (2013.01)] 14 Claims
 
1. A toner comprising
a toner particle comprising a binder resin and a wax, and
an inorganic fine particle on a surface of the toner particle,
wherein the binder resin comprises a resin A;
taking SPa (cal/cm3)0.5 as an SP value of the resin A calculated in accordance with the Fedors method, and
taking SPw (cal/cm3)0.5 as an SP value of the wax calculated in accordance with the Fedors method,
the SPa and the SPw satisfy Expression (1) below:
2.50≤SPa−SPw≤4.50  (1),
the inorganic fine particle comprises a silica fine particle whose surface has been treated with a silicone oil;
in a 29Si solid-state NMR measurement of the silica fine particle,
taking A as an integration value of a D unit worked out by taking an integration value of a Q unit in a CP/MAS measurement as 100, and
taking B as an integration value of a D unit worked out by taking an integration value of a Q unit in a DD/MAS measurement as 100,
the A and the B satisfy Expressions (2) and (3) below:
30≤B≤60  (2)
4.0≤A/B≤6.0  (3).