Browse Prior Art Database

PVK DISPERSED TRIGONAL SELENIUM GENERATOR BINDERS

IP.com Disclosure Number: IPCOM000026299D
Original Publication Date: 1991-Feb-28
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 68K

Publishing Venue

Xerox Disclosure Journal

Abstract

Polyvinyl carbazole (PVK) known to be an excellent dispersant for trigonal selenium and has been used extensively for forming the charge generator layer binder in photoreceptor devices. PVWtrigonal selenium layers have a rather low adhesion to the blocking layedground plane (BGL) side of the photoreceptor and require a polymer interface adhesive layer, for adequate adhesion.

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XEROX DISCLOSURE JOURNAL

PVK DISPERSED TRIGONAL Proposed Classification SELENIUM GENERATOR BINDERS U.S. C1.430/059 Susan Robinette
Int. Anita P. Lynch C1. G03g 05/00

Polyvinyl carbazole (PVK) known to be an excellent dispersant for trigonal selenium and has been used extensively for forming the charge generator layer binder in photoreceptor devices. PVWtrigonal selenium layers have a rather low adhesion to the blocking layedground plane (BGL) side of the photoreceptor and require a polymer interface adhesive layer, for adequate adhesion.

A method for retaining the excellent dispersing properties of PVK while greatly increasing the adhesive bond strength between the blocking layer/ generator layer and both the transport layer and the interface adhesive layer is to mill trigonal selenium with PVK in a solvent suspension to obtain a fine dispersion followed by adding additional polymer(s) to form a polymer blend in the let down step. A particularly beneficial polymer for preparing the blend is bisphenol-z (PCZ 1, that is poly(4,4'-diphenol-l,l'-cyclohexane carbonate).

Thus for example to prepare a BGL solution, trigonal selenium was milled into PVK with THF/toluene (1:l) as a suspension until a particle size of approximately 0.07 micrometers was achieved. A let down solution consisting of PCZ and PVK (1:3 = wt:wt) in THFitoluene(1:l) was prepared. The BGL solution was then coated onto a base support so as to produce about a 2.3 micrometer thick generator layer. Adhe...