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 |
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.
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