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Preparation of a Charge-Generation Layer Using Electron Beam Curing

IP.com Disclosure Number: IPCOM000062168D
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Pacansky, J: AUTHOR [+2]

Abstract

The photoconductors used in photocopiers often consist of a layered organic medium coated onto an aluminized polymer substrate. The photoconductors usually consist of at least three layers. The binder layer provides for proper adhesion of the charge-generation layer (CGL) to the aluminum substrate; the CGL contains a dye that generates electron-hole pairs when exposed to light of the proper wavelength; the charge transport layer contains a material imbedded in a polymeric matrix for the transport of holes from the CGL to the surface of the photoconductor. Organic layered photoconductors are prepared by conventional coating processes whereby heat is used to drive off solvents from an uncured film. This process is expensive. We describe a process for preparing a CGL that uses no solvents and requires only one step.

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Preparation of a Charge-Generation Layer Using Electron Beam Curing

The photoconductors used in photocopiers often consist of a layered organic medium coated onto an aluminized polymer substrate. The photoconductors usually consist of at least three layers. The binder layer provides for proper adhesion of the charge-generation layer (CGL) to the aluminum substrate; the CGL contains a dye that generates electron-hole pairs when exposed to light of the proper wavelength; the charge transport layer contains a material imbedded in a polymeric matrix for the transport of holes from the CGL to the surface of the photoconductor. Organic layered photoconductors are prepared by conventional coating processes whereby heat is used to drive off solvents from an uncured film. This process is expensive. We describe a process for preparing a CGL that uses no solvents and requires only one step. The dye was dispersed in a commercial monomeric acrylate/ methacrylate like tetrahydofurfuryl acrylate, polyethylene glycol diacrylate, or diethylene glycol diacrylate, for example. This dispersion was then applied on an Al-polymer substrate with a doctor blade and then exposed to a 175 kV electron beam under nitrogen at atmospheric pressure. Nominally, a dose equal to 20 to 30 megarads was required to completely cure the layers. The CGL was tested for photoconductivity by coating a standard charge transfer layer (CTL) over the electron beam-cured CGL.

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