Cabot Corporation

John R Szwec

Agathagelos Kyrlidis

Eugene N Step

Andriy Korchev

Gregory R Schulz

Clovis D Haynes

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 the composite of 4000 or less and comprising the formula &#x2014;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 &#x2014;X(G)- is nonionic; and wherein the resistive composite has a volume resistivity, R, at a relative volume fraction, X, of the at least one carbon black in the coating, where Ris at least 10ohm-cm; and log Rhas a substantially linear relationship with Xwhen Xis 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.

High resistivity coating compositions having unique percolation behavior, and electrostatic image developing systems and components thereof incorporating same

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Hudson, NH, United States of America

John R Szwec