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Undercoat layer and imaging members comprising same

a technology of imaging members and undercoats, applied in electrographic processes, electrographic processes using charge patterns, instruments, etc., can solve the problems of expensive and time-consuming process of removing these layers, and achieve the effect of simplifying the process of substrate reclamation

Inactive Publication Date: 2011-06-23
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method for reclaiming a substrate from an imaging member without affecting its electrical properties. The method involves using an undercoat layer made of a metal oxide, a polymer, and a citrate of Formula (I). The undercoat layer is formed by dispersing the metal oxide, polymer, and citrate in a solvent. The imaging member is then immersed in a stripping solution to separate the undercoat layer from the substrate. The stripping solution may contain a solvent or an acid. The technical effect of this method is that it simplifies the process of reclaiming the substrate from the imaging member without causing any damage.

Problems solved by technology

The process for removing these layers, known as substrate reclamation, is an expensive and somewhat time-consuming process.

Method used

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  • Undercoat layer and imaging members comprising same
  • Undercoat layer and imaging members comprising same
  • Undercoat layer and imaging members comprising same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072]A photoconductor was prepared by repeating the above process of Comparative Example 1, except that 0.6 gram of acetyl tributyl citrate (UNIPLEX® 84, obtained from Unitex Chemical Corporation) was added into the undercoat layer dispersion of Comparative Example 1. A 30 millimeter aluminum drum substrate was then coated with the aforementioned generated dispersion using known coating techniques as illustrated herein. After drying at 160° C. for 20 minutes, an undercoat layer of TiO2 in the phenolic resin and the citrate (TiO2 / phenolic resin / citrate=58.8 / 39.2 / 2 w / w / w) about 8 microns in thickness was obtained.

example 2

[0073]A photoconductor was prepared by repeating the above process of Comparative Example 1, except that 1.5 gram of acetyl tributyl citrate (UNIPLEX® 84, obtained from Unitex Chemical Corporation) was added into the undercoat layer dispersion of Comparative Example 1. A 30 millimeter aluminum drum substrate was then coated with the aforementioned generated dispersion using known coating techniques as illustrated herein. After drying at 160° C. for 20 minutes, an undercoat layer of TiO2 in the phenolic resin and the citrate (TiO2 / phenolic resin / citrate=57.1 / 38.1 / 4.8 w / w / w) about 8 microns in thickness was obtained.

example 3

[0074]A photoconductor was prepared by repeating the above process of Comparative Example 1, except that 3.0 gram of acetyl tributyl citrate (UNIPLEX® 84, obtained from Unitex Chemical Corporation) was added into the undercoat layer dispersion of Comparative Example 1. A 30 millimeter aluminum drum substrate was then coated with the aforementioned generated dispersion using known coating techniques as illustrated herein. After drying at 160° C. for 20 minutes, an undercoat layer of TiO2 in the phenolic resin and the citrate (TiO2 / phenolic resin / citrate=54.5 / 36.4 / 9.1 w / w / w) about 8 microns in thickness was obtained.

Electrical Property Testing

[0075]The above prepared photoconductors of Comparative Example 1, and Examples 1, 2 and 3 were tested in a scanner set to obtain photoinduced discharge cycles, sequenced at one charge-erase cycle followed by one charge-expose-erase cycle, wherein the light intensity was incrementally increased with cycling to produce a series of photoinduced dis...

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Abstract

Disclosed are undercoat layers comprising a metal oxide, a polymer, and a citrate of Formula (I):wherein R1 is H, alkyl, or COR′; wherein R′ is alkyl; and wherein R2, R3, and R4 are independently alkyl. The undercoat layers are useful in imaging members because they are easily separated from the substrate. This reduces the number of steps necessary to reclaim the substrate.

Description

BACKGROUND[0001]Disclosed herein, in various embodiments, are undercoat layers useful in various imaging members and the imaging members themselves. Among other things, the undercoat layers can be readily removed, allowing the substrate to be more easily recycled.[0002]Electrophotographic imaging members, i.e. photoreceptors, typically include a photoconductive layer formed on an electrically conductive substrate. The photoconductive layer is an insulator in the dark so that electric charges can be retained on its surface. Upon exposure to light, the charge is dissipated.[0003]An electrostatic latent image is formed on the photoreceptor by first uniformly depositing an electric charge over the surface of the photoconductive layer by one of the many known means in the art. The photoconductive layer functions as a charge storage capacitor with charge on its free surface and an equal charge of opposite polarity on the conductive substrate. A light image is then projected onto the photo...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G03G15/00G03G13/06
CPCG03G5/142C11D7/5004G03G5/144B09B5/00G03G5/102
Inventor TONG, YUHUAWU, JINALTAVELA, ROBERT P.GRABOWSKI, EDWARD F.EVANS, KENT J.RAMOS, ADILSON P.BELKNAP, NANCY L.CHERNIACK, HELEN R.
Owner XEROX CORP