US 12,306,581 B2
Toner
Kenta Kamikura, Kanagawa (JP); Kozue Uratani, Shizuoka (JP); Kosuke Fukudome, Tokyo (JP); Tetsuya Kinumatsu, Shizuoka (JP); Takuya Mizuguchi, Shizuoka (JP); and Yuta Komiya, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 9, 2021, as Appl. No. 17/643,525.
Claims priority of application No. 2020-217539 (JP), filed on Dec. 25, 2020; and application No. 2021-141831 (JP), filed on Aug. 31, 2021.
Prior Publication US 2022/0214630 A1, Jul. 7, 2022
Int. Cl. G03G 9/087 (2006.01); G03G 9/097 (2006.01)
CPC G03G 9/09733 (2013.01) [G03G 9/08711 (2013.01)] 5 Claims
 
1. A toner, comprising:
an external additive comprising a hydrotalcite; and
a toner particle comprising (i) a styrene-acrylic resin having a unit represented by formula (1) and (ii) an ester compound A which is represented by formulae (2) or (3)

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry
where R1 represents a hydrogen atom or a methyl group, R2 represents a straight-chain alkyl group having 10 to 14 carbon atoms, and R11 to R14 and R21 to R26 independently represent a straight-chain alkyl group having 15 to 21 carbon atoms, wherein
an absolute value of a difference between SPb and SPw1 is 1.00 to 2.00, when SPb (J/cm3)1/2 is an SP value of the styrene-acrylic resin, and SPw1 (J/cm3)1/2 is an SP value of ester compound A.