US 12,461,464 B2
Charging roll for electrophotographic equipment
Shinkichi Kashihara, Aichi (JP); Junichiro Suenaga, Aichi (JP); Akitoshi Morita, Aichi (JP); and Takeru Horiuchi, Aichi (JP)
Assigned to Sumitomo Riko Company Limited, Aichi (JP)
Filed by Sumitomo Riko Company Limited, Aichi (JP)
Filed on Nov. 6, 2024, as Appl. No. 18/939,477.
Application 18/939,477 is a continuation of application No. PCT/JP2023/017624, filed on May 10, 2023.
Claims priority of application No. 2022-101690 (JP), filed on Jun. 24, 2022.
Prior Publication US 2025/0060687 A1, Feb. 20, 2025
Int. Cl. G03G 15/02 (2006.01)
CPC G03G 15/0233 (2013.01) [G03G 2215/025 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A charging roll for electrophotographic equipment, comprising a shaft body and an elastic layer formed on an outer peripheral surface of the shaft body,
wherein the elastic layer is a crosslinked product of a rubber composition that contains the following (a) to (e):
(a) one or two or more selected from hydrin rubber and nitrile rubber,
(b) a crosslinking agent,
(c) an ionic electroconductive agent,
(d) one or two or more selected from piperidinyloxy radical compounds, and
(e) one or two or more selected from salts of cyclic amidine compounds and thiophthalimide compounds.