| abstract |
Disclosed herein are resistive composites comprising at least one resin; at least one carbon black having a surface hydrophobically modified with at least one organic group, the at least one organic group having a molecular weight of 4000 or less and comprising the formula --X(G)—, wherein X is directly attached to the at least one carbon black and is selected from arylene, heteroarylene, and alkylene, G is a substituent of X, and —X(G)— is nonionic; and wherein the resistive composite has a volume resistivity, R v , at a relative volume fraction, X CB , of the at least one carbon black in the coating, where R v is at least 10 6 ohm-cm; and log Rv has a substantially linear relationship with X CB when X CB is varied from 0.1 to 0.5. Also disclosed are coatings made from such composites, such as coatings for rollers/belts for office automation machines, and methods of making such coatings. |