Electroconductive elastic member and electrophotographic apparatus using same

摘要

An electroconductive elastic member including an electroconductive material prepared from a polyurethane foam or polyurethane elastomer using a polyester polyol and a quaternary ammonium salt to impart electroconductivity. The polyurethane foam or polyurethane elastomer can be produced using, as a polyisocyanate component, a hydrogenated product from diphenyl-methane diisocyanate, hexamethylene diisocyanate, or any of various modified diphenylmethane/hexamethylene diisocyanate The elastic member may be used in an electrophotographic apparatus. Thus the member is well suited for producing an elastic roller with intermediate electric resistance in an electrophotographic process.