| 摘要 |
Provided is an electroconductive member for electrophotography having a stable charging ability. The electroconductive member includes, in this order, an electroconductive substrate, an electroconductive elastic layer, and a surface layer. The surface layer contains a polymer having a urethane linkage. The polymer has, in the molecule, structures included in at least two groups selected from: Group A of structures each represented by a specific structural formula (1); Group B of at least one of structures each represented by a specific structural formula (2) or structures each represented by a structural formula (3); and Group C of structures each represented by a specific structural formula (4). The surface layer has a volume resistivity of 1.0×1010 Ω·cm or more and 1.0×1016 Ω·cm or less, and the surface layer has a universal hardness at a depth 1 μm from the surface thereof of 1.0 N/mm2 or more and 7.0 N/mm2 or less. |
| 主权项 |
1. An electroconductive member for electrophotography, comprising, in this order:
an electroconductive substrate; an electroconductive elastic layer; and a surface layer, wherein the surface layer
has a volume resistivity of 1.0×1010 Ω·cm or more and 1.0×1016 Ω·cm or less,has a universal hardness at a depth of 1 μm from a surface thereof of 1.0 N/mm2 or more and 7.0 N/mm2 or less, andcontains a polymer having a urethane linkage, the polymer having, in a molecule, structures of at least two groups selected from the following three groups of structures (A), (B), and (C): (A) a structure represented by the following structural formula (1); (B) at least one structure selected from a group consisting of a structure represented by the following structural formula (2) and a structure represented by the following structural formula (3); and (C) a structure represented by the following structural formula (4): where: in the structural formula (1), R11, R12, and R13 each represent a divalent hydrocarbon group having 3 or more and 9 or less carbon atoms, provided that R11 and R12 are different from each other and R13 is identical to one of R11 and R12, and p and q each independently represent a number of 1.0 or more; in the structural formula (2), r and s each independently represent a number of 1.0 or more; in the structural formula (3), R31 and R32 each independently represent a divalent hydrocarbon group having 3 or more and 8 or less carbon atoms, and m and n each independently represent a number of 1.0 or more; and in the structural formula (4), R41 represents a divalent hydrocarbon group having 6 or more and 9 or less carbon atoms, and k represents a number of 1.0 or more. |
