Lexmark International, Inc.

Paul Dwight Kemmesat

Kasturi Rangan Srinivasan

Michael Thomas Moore

Jennifer Kaye Neely

Laura Lee Kierstein

Garry Dale Hinch

Catherine Mailhe Randolph

Eric L Ziercher

Michael George Sloan

Karin Ann Voll

The invention described in the specification provides an improved coating for an electrophotographic photoconductor printing system. In particular, a blend of polycarbonate-A and polycarbonate-Z binders according to the formula: ##STR1## wherein R.sup.1 is selected from the group consisting of CH.sub.2 an alkylidene group, a cycloalkyl group and a substituted cycloalkyl group, R.sup.2 and R.sup.3 are selected from the group consisting of hydrogen, halogen and an a CH.sub.3 group provides increased durability and wear properties to a charge transport layer coated onto a charge generation layer of a photoreceptor drum. The polycarbonate blend may be used with amine and hydrazone charge transport materials and the charge transport layer may include additional additives which further improve the wear properties of the photoconductor coatings in a laser printer.

Electrophotographic photoconductors

An electrophotographic photoconductor containing an aromatic polycarbonate binder resin and silicone microspheres provides improved wear resistance, increased useful life of the photoconductive drum, a high quality image over the life of the photoconductor, and improved coating uniformity.

Photoconductor containing silicone microspheres

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Longmont, CO, United States of America

Paul Dwight Kemmesat