US 12,443,119 B2
Process cartridge and electrophotographic apparatus
Kaname Watariguchi, Kanagawa (JP); Chiharu Nakazono, Shizuoka (JP); Hideharu Shimozawa, Tokyo (JP); Tsutomu Nishida, Shizuoka (JP); Atsushi Okuda, Kanagawa (JP); and Taiji Katsura, Shizuoka (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 3, 2023, as Appl. No. 18/178,070.
Claims priority of application No. 2022-039604 (JP), filed on Mar. 14, 2022.
Prior Publication US 2023/0333494 A1, Oct. 19, 2023
Int. Cl. G03G 9/087 (2006.01); G03G 5/07 (2006.01); G03G 5/147 (2006.01); G03G 9/097 (2006.01); G03G 21/18 (2006.01)
CPC G03G 5/14734 (2013.01) [G03G 5/072 (2020.05); G03G 9/09708 (2013.01); G03G 21/1814 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A process cartridge configured to be removably mounted onto a main body of an electrophotographic apparatus, the process cartridge comprising:
an electrophotographic photosensitive member;
a toner; and
a developing member configured to supply the toner to the electrophotographic photosensitive member;
the electrophotographic photosensitive member having a surface layer that is a polymerized film of a composition containing (i) at least one kind of monofunctional (meth)acrylic compound selected from the group consisting of a monofunctional (meth)acrylic monomer and a monofunctional (meth)acrylic oligomer, and (ii) at least one kind of tri- or higher functional (meth)acrylic compound selected from the group consisting of a tri- or higher functional (meth)acrylic monomer and a tri- or higher functional (meth)acrylic oligomer;
the surface layer comprising a diphenylamine compound represented by formula (A3)

OG Complex Work Unit Chemistry
where R301 to R310 independently represent a hydrogen atom, a methyl group or an ethyl group, wherein
a content ratio of the diphenylamine compound in the surface layer is 0.001 to 1.0 mass % with respect to a total mass of the surface layer,
the toner contains a toner particle and a hydrotalcite particle as an external additive, and
the hydrotalcite particle contains fluorine in filter fitting analysis of STEM-EDS analysis.