Conductive member
AssigneeCanon Kabushiki Kaisha
InventorsNorifumi Muranaka, Satoru Yamada, Kazuhiro Yamauchi, Seiji Tsuru, Yuka Muranaka
Life of this patent
Estimating the term…
Abstract
Provided is such a conductive member that a change in its electrical resistance value caused by its long-term use is reduced to the extent possible. The conductive member has a conductive support and a conductive layer, the conductive layer contains a rubber composition formed of a modified epichlorohydrin rubber, and the modified epichlorohydrin rubber has a unit represented by the following formula (1). In the formula (1), R1, R2, and R3 each independently represent hydrogen or a saturated hydrocarbon group having 1 to 18 carbon atoms.
Claims6
A method for manufacturing a conductive member comprising a conductive support and a conductive layer on the conductive support, the method comprising the steps of:
- (i) providing an unmodified epichlorohydrin rubber having units represented by formulae (2), (3), and (4):
- in which n represents an integer of 1 to 3,
- (ii) reacting an amine compound with the unmodified epichlorohydrin rubber to obtain a modified epichlorohydrin rubber having units represented by said formulae (3) and (4), and formula (1);
- in which R1, R2, and R3 each independently represent hydrogen or a saturated hydrocarbon group having 1 to 18 carbon atoms;
- and
- (iii) heating the modified epichlorohydrin rubber on the periphery of a mandrel to at least 160° C. to remove unreacted amine compound, and vulcanizing the modified epichlorohydrin rubber to obtain the conductive layer, wherein
- the step (iii) is performed after the step (ii), and
- the amine compound has a boiling point of 160° C. or less.
Dependencies are inferred from the claim text.