Roll or roller – Concentric layered annulus – Specific composition
Reexamination Certificate
2006-04-12
2009-06-09
Omgba, Essama (Department: 3726)
Roll or roller
Concentric layered annulus
Specific composition
C492S053000
Reexamination Certificate
active
07544158
ABSTRACT:
An electroconductive rubber roller constituted of an electroconductive metal core and an electroconductive crosslinked rubber layer including an epichlorohydrin-based rubber, wherein the epichlorohydrin-based rubber is at least one copolymer selected from the group consisting of an epichlorohydrin-ethylene oxide copolymer and an epichlorohydrin-ethylene oxide-allyl glycidyl ether ternary copolymer. The ethylene oxide unit in the epichlorohydrin-based rubber is in a content of 40 to 90 mol %, and, the electroconductive crosslinked rubber layer has a heat quantity (enthalpy: ΔH) 5 mJ/mg or less as measured by a differential scanning calorimetry (DSC) and indicated by a peak appearing within a range of −20 to 150° C.
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Harada Norihiro
Hashimoto Masayuki
Hyuga Mihoko
Yamada Akihisa
Canon Kasei Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Omgba Essama
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