Patent ID: 8163389

Claim:
A conductive roll having at least one conductive elastic layer on an outer periphery of a core bar, the conductivity of the elastic layer being provided by carbon black, wherein the conductive elastic layer is prepared by reacting, in a mold, three components consisting of a polyol, a diisocyanate and a catalyst wherein the polyol consists essentially of a polyether-based polyol having an average functional group number of 2.5 or more per molecule and is reacted with the diisocyanate having an average functional group number of more than 2 per molecule at an NCO/OH mol ratio of less than 1 in the presence of a catalytic amount of tetravalent organotin-based compound having a tin content of 18.7% or less by weight and wherein the organotin-based compound has sulfur atoms bound adjacent to tin atoms, wherein the organotin-based compound is selected from the group of dibutyltin bisisononyl-3-mercaptopropionate and dibutyltin bisisooctylthioglycollate, wherein the organotin-based compound is 0.001 to 0.05% by weight based on said polyol.