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TRANSPORT LAYER BINDERS FOR MULTILAYERED PHOTORECEPTORS

IP.com Disclosure Number: IPCOM000026452D
Original Publication Date: 1992-Feb-29
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 80K

Publishing Venue

Xerox Disclosure Journal

Abstract

Multilayered photoreceptors are well known in the electrophotographic imaging art. Generally, multilayered photoreceptors comprise a charge generating layer and a charge transporting layer containing charge transport molecules and a binder resin. It has been found that styrene copolymers commonly used as toner resins may be employed as binders in the charge transport layers of multilayered photoreceptors. For example, toner resins such as styrene-acrylate copolymers, styrene-n-butylmethacrylate copolymers or styrene butadiene copolymers containing between about 40 to 70 weight percent (based on the total weight of the dried mixture) of arylamine charge transport molecules such as N,N'-diphenyl-N,N'-bis (3"-methylpheny1)-( 1,l'- biphenyl)-4,4'-diamine produce transparent, glossy transport layers exhibiting excellent electrophotographic electrical properties including, for example, substantially stable surface charging potentials from one xerographic cycle to the next for 10,000 cycles. Since these charge transport layers are brittle and can cause delamination in flexible multilayered photoreceptors, they are more suitable for photoreceptor drum applications. Typical multilayered photoreceptors may comprise, for example, a rigid supporting layer, an electrically conductive layer, a charge transport layer and a charge generating layer or a rigid supporting layer, an electrically conductive layer, a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, Charge transport layers containing a styrene copolymer may be deposited by any suitable technique such as spray or dip coating onto rigid substrates. If machine wear is a problem a thin overcoat of a tougher polymer could be applied to the imaging surface of the multilayered photoreceptor.

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XEROX DISCLOSURE JOURNAL

TRANSPORT LAYER BINDERS Proposed Classification FOR MULTILAYERED PHOTO- U.S. C1.430/059 RECEPTORS Int. C1. G03g 15/02 Susan Robinette
Robert A. Nelson
Anita P. Lynch
Robert D. Bayley

Multilayered photoreceptors are well known in the electrophotographic imaging art. Generally, multilayered photoreceptors comprise a charge generating layer and a charge transporting layer containing charge transport molecules and a binder resin. It has been found that styrene copolymers commonly used as toner resins may be employed as binders in the charge transport layers of multilayered photoreceptors. For example, toner resins such as styrene-acrylate copolymers, styrene-n-butylmethacrylate copolymers or styrene butadiene copolymers containing between about 40 to 70 weight percent (based on the total weight of the dried mixture) of arylamine charge transport molecules such as N,N'-diphenyl-N,N'-bis (3"-methylpheny1)-( 1,l'-
biphenyl)-4,4'-diamine produce transparent, glossy transport layers exhibiting excellent electrophotographic electrical properties including, for example, substantially stable surface charging potentials from one xerographic cycle to the next for 10,000 cycles. Since these charge transport layers are brittle and can cause delamination in flexible multilayered photoreceptors, they are more suitable for photoreceptor drum applications. Typical multilayered photoreceptors may comprise, for example, a rigid supporting layer, an electricall...