| 摘要 |
PROBLEM TO BE SOLVED: To obtain an electroconductive roller for electrophotography having low hardness, not contaminating a photoreceptor to be brought into contact with the roller, having slight change in dimension and resistance by an environment. SOLUTION: In this electroconductive roller for electrophotography equipped with an electroconductive elastic layer 17 on the outer periphery of a metal revolving shaft 16, the electroconductive elastic layer comprises an electroconductive polyurethane obtained by compounding two or more kinds of polyolefin polyols with an aromatic isocyanate containing a structural isomer so as to have 1.0-1.5 isocyanate index and reacting the mixture with an electroconductivity imparter. |
