US 11,753,519 B2
Conductive roll for electrophotographic machine
Shinkichi Kashihara, Aichi (JP); Takeru Horiuchi, Aichi (JP); and Naoki Akira, Aichi (JP)
Assigned to Sumitomo Riko Company Limited, Aichi (JP)
Filed by Sumitomo Riko Company Limited, Aichi (JP)
Filed on Nov. 4, 2020, as Appl. No. 17/88,590.
Application 17/088,590 is a continuation of application No. PCT/JP2019/018383, filed on May 8, 2019.
Claims priority of application No. 2018-105750 (JP), filed on Jun. 1, 2018.
Prior Publication US 2021/0054167 A1, Feb. 25, 2021
Int. Cl. G03G 15/02 (2006.01); C08K 3/04 (2006.01); C08K 5/14 (2006.01); C08L 9/00 (2006.01); F16C 13/00 (2006.01); C08K 5/00 (2006.01); G03G 15/08 (2006.01); G03G 15/16 (2006.01)
CPC C08K 3/04 (2013.01) [C08K 5/00 (2013.01); C08K 5/14 (2013.01); C08L 9/00 (2013.01); F16C 13/00 (2013.01); G03G 15/0233 (2013.01); G03G 15/08 (2013.01); G03G 15/16 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A conductive roll for an electrophotographic machine, the conductive roll being a charging roll and comprising:
a shaft body; and
an elastic body layer formed on an outer periphery of the shaft body, wherein the elastic body layer is a crosslinked body of a composition containing:
a diene-based polymer (a),
a crosslinking agent (b),
a carbon black (c), and
a coupling agent (d), wherein
the crosslinking agent (b) is a sulfur crosslinking agent or a peroxide crosslinking agent;
the carbon black (c) has a specific surface area ranging from 40 m2/g to 300 m2/g, and a content of the carbon black (c) in the composition ranges from 10 parts by mass to 45 parts by mass with respect to 100 parts by mass of the diene-based polymer (a); and
the coupling agent (d) is (d1) or (d2) below, and a content of the coupling agent (d) in the composition ranges from 0.5 part by mass to 20 parts by mass with respect to 100 parts by mass of the diene-based polymer (a):
(d1) a coupling agent having a NHR1 group and a SSO3H group;
(d2) a coupling agent having a NHR1 group and an ene structure, wherein
R1 is H or a hydrocarbon group having 1 to 8 carbon atoms.