Xerox Corporation

Christopher J Au Clair

Chin H Lu

Peter F Erhardt

This invention is directed to negatively charged toner compositions, and developer compositions, the toner composition being comprised of resin particles, and pigment particles, and from about 0.1 to about 10 percent based on the weight of the resin particles, a ortho-halo pheny carboxylic acid charge enhancing additive of the formula: ##STR1## wherein X is halogen, Y is hydrogen or halogen, and R is an alkylene group of from 1 to about 3 carbon atoms, and n is the number zero (O) or 1; as well as to methods of utilizing such compositions in electrostatographic imaging systems, particularly those systems wherein colored images are produced.

Ortho-halo phenyl carboxylic acid charge enhancing additives

This invention is directed to toner and developer compositions, as well as the use of such compositions in electrostatographic imaging systems, the toner composition being comprised of resin particles and pigment particles, and from about 0.1 percent to about 10 percent based on the weight of the toner particles, a para-halo phenyl carboxylic acid charge enhancing additive of the formula: ##STR1## wherein X is a halogen, R is an alkylene group containing from 1 to about 3 carbon atoms, and n is the number zero or 1.

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Fairport, NY, United States of America

Christopher J Au Clair