| 摘要 |
<p>The charging roller has a base layer formed of an electroconductive rubber composition containing (a) a polar rubber having an unsaturated bond or an ether bond, (b) an ion carrier containing one or more phosphonium salts selected from the group consisting of phosphonium salts having the formulae (1) and (2), and (c) a cross-linker, wherein the amount of (b) component ranges from 0.1 to 10 parts by mass per 100 parts by mass of the (a) component. The formula (1) represents [(H9C4)3(CnH2n+1)P]+(CF3SO2)2N—, and the formula (2) represents [(H9C4)3(CnH2n+1)P]+(CF3SO3)—.</p> |
