US 12,078,962 B2
Toner
Tomohisa Sano, Shizuoka (JP); and Kazuyuki Sato, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 16, 2021, as Appl. No. 17/377,488.
Claims priority of application No. 2020-125110 (JP), filed on Jul. 22, 2020.
Prior Publication US 2022/0026823 A1, Jan. 27, 2022
Int. Cl. G03G 9/093 (2006.01)
CPC G03G 9/09378 (2013.01) [G03G 9/09371 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A toner, comprising:
a toner particle comprising a core particle with a shell on the surface thereof;
the core particle comprising a binder resin, a diester wax and a paraffin wax;
the diester wax being represented by

OG Complex Work Unit Chemistry
when R1 is an alkylene group having 2 to 12 carbons, and R2 and R3 are independently a straight-chain alkyl group having 16 to 22 carbons; and
5 to 80 mass % of the shell being insoluble in tetrahydrofuran, wherein
Sp≤0.40 and 16.00≤Wp−Sp≤20.00
when Sp is a partition coefficient of the shell and Wp is a partition coefficient of the diester wax,
the binder resin comprises 80 to 100% by mass polyester resin, and
a content of the paraffin wax is 1 to 20 mass parts per 100 mass parts of the binder resin.