| abstract |
(57) Abstract: A conductive rubber composition that provides a conductive rubber having a small fluctuation range of an electric resistance value with respect to an environmental change, a low hardness, and a small compression set, and a conductive roll using the conductive rubber. I will provide a. SOLUTION: The conductive rubber composition of the present invention comprises an organic rubber (A) and carbon black (B) satisfying the following conditions. And quaternary ammonium perchlorate (C1) and polyalkylene glycol aliphatic carboxylic acid diester (C A conductivity-imparting agent (C) comprising at least one compound selected from 2). [Conditions of carbon black (B)] LogρV obtained from the addition amount W (parts by weight) of carbon black (B) to 100 parts by weight of organic rubber (A) and the volume resistivity (logρV) at each addition amount W In the vs. W curve, logρV is 3 to 1 The maximum value (θmax) of the absolute values of the slopes of the tangents in a range where 0 and W is 1 to 50 parts by weight is 0.3 or less. |