US 12,287,605 B2
Toner and production method thereof, toner stored unit, image forming apparatus, and image forming method
Yasuo Kamada, Shizuoka (JP); Hiroshi Yamada, Shizuoka (JP); Akinori Saitoh, Shizuoka (JP); Akio Takei, Shizuoka (JP); Toma Takebayashi, Shizuoka (JP); and Masahiro Yukikawa, Kanagawa (JP)
Assigned to Ricoh Technology, Ltd., Tokyo (JP)
Filed by RICOH COMPANY, LTD., Tokyo (JP)
Filed on May 12, 2021, as Appl. No. 17/318,396.
Claims priority of application No. 2020-086612 (JP), filed on May 18, 2020.
Prior Publication US 2021/0356877 A1, Nov. 18, 2021
Int. Cl. G03G 9/08 (2006.01); G03G 9/097 (2006.01); G03G 15/08 (2006.01)
CPC G03G 9/0825 (2013.01) [G03G 9/0802 (2013.01); G03G 9/09733 (2013.01); G03G 15/0865 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A toner comprising:
toner base particles each comprising a binder resin, a colorant, and wax; and
resin particles on surfaces of the toner base particles,
wherein a standard deviation of a distance between the resin particles next to each other on the surfaces of the toner base particles is less than 500 nm;
wherein a glass transition temperature of a tetrahydrofuran (THF)-insoluble component of the toner in a first heating as measured by DSC is from −45° C. through 5° C.; and
wherein the resin particles comprise a copolymer of styrene, butyl acrylate, methacrylic acid, and polyoxyethylene-1-(allyloxymethyl)alkyl ether ammonium sulfate.