Photoreceptor with overcoat layer

A technology of outer coating and imaging element, applied in optics, instruments, electrographics, etc., can solve the problems of prone to cracking and reducing the useful life of photoreceptors, etc.

Inactive Publication Date: 2007-07-18
XEROX CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such topcoats are typically prone to cracking, especially during use, and under humidity
Both effects tend to reduce the useful life of the photoreceptor, or limit the range of environments and printing equipment in which the photoreceptor can be used

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photoreceptor with overcoat layer
  • Photoreceptor with overcoat layer
  • Photoreceptor with overcoat layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0143] Example 1 - Preparation of Hydroxyl-Containing Hole Transport Compounds:

[0144]The hydroxyl-containing hole transport compound N,N-bis(4-hydroxymethylphenyl)-3,4-dimethylphenylamine was prepared as follows:

[0145]

[0146] N,N-Bisphenyl-3,4-dimethylphenylamine is prepared by the known Ulmann condensation process.

[0147] A mixture of N,N-bisphenyl-3,4-dimethylphenylamine (162 g), zinc chloride (80.76 g), DMF (129.94 g) and Isopar L (222 g) was added to the 3-L RB (round bottom) flask. Phosphorus oxychloride (272.62 g) was added dropwise to the reaction mixture under argon with stirring. The reaction mixture was heated to 120°C and maintained at this temperature for 12 hours. Then about 500 g of N,N'-dimethylformamide was added to the obtained mixture. The reaction mixture was cooled to about 50°C and poured into 2.5 L of water with mechanical stirring. The precipitate obtained was collected by filtration and washed twice with water (2 L) and then refluxed...

Embodiment 2

[0149] Example 2 - Preparation of Overcoat Composition:

[0150] A coating composition was formed comprising: 1 gram of DESMOPHEN(R) 800 polyester polyol, 0.6 gram of Cymel 1130, 0.8 gram of the hole transport molecule N,N-bis(4-hydroxymethylphenyl)-3 of Example 1 , 4-dimethylphenylamine, 7.2 grams of 1-methoxy-2-propanol (DowanolPM) and 0.2 grams of p-toluenesulfonic acid / pyridine (8% acid / 4% pyridine in 1-methoxy base-2-propanol). The components are mixed and shaken at room temperature (about 20°C to about 25°C) until all components are dissolved.

Embodiment 3

[0153] Example 3 - Preparation of Overcoated Imaging Elements:

[0154] Overcoated imaging element sheets or tapes were formed using the coating composition of Example 2. Specifically, electrophotographic imaging element web stock was prepared by providing a biaxially stretched polyethylene naphthalate substrate (Kadalex, available from ICI Americas, Inc.) at a thickness of 3.5 mils (89 microns). ) was coated with a 0.02 micron thick layer of titanium and applied using the gravure coating technique containing 10 grams of gamma-aminopropyltriethoxysilane, 10.1 grams of distilled water, 3 grams of acetic acid, 684.8 grams of 200 anti-denatured alcohol and 200 g of heptane. This layer was then allowed to dry in a forced air oven at 135°C for 5 minutes. The dry thickness of the barrier layer obtained was measured with an ellipsometer to be 0.05 microns.

[0155] The adhesive interface layer was then prepared by applying to the barrier layer a wet coating comprising 5 wt% poly...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

An electrophotographic imaging member includes a substrate, a charge generating layer, a charge transport layer, and an overcoating layer, the overcoating layer being a cured film formed from a film forming resin composition including at least a melamine compound, a polyol, and a charge transport compound, where the charge transport compound is represented by: Q L-OH] n where Q represents a charge transport component, L represents a divalent linkage group, and n represents a number of repeating segments or groups.

Description

technical field [0001] The present disclosure relates generally to electrophotographic imaging elements, and more particularly to layered photoreceptor structures with improved overcoats. In particular, the present disclosure relates to electrophotographic imaging elements with improved overcoats comprising hydroxyl-containing hole transport compounds as hole transport molecules. The present disclosure also relates to methods of making and using the imaging elements. Background technique [0002] Despite the various methods used to form overcoats for electrophotographic imaging elements such as photoreceptors, there remains a need for improved overcoat designs that provide increased resistance to abrasion and water, such as humidity, and the like. There is also a need for improved overcoat designs to provide a hard yet flexible layer that is more resistant to cracking. For example, a series of hard overcoat materials have previously been provided in the art. However, such...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G03G5/04G03G5/05
CPCG03G5/14791G03G5/14708G03G5/14752G03G5/14756G03G5/1476G03G5/14769
Inventor Y·齐H·阿齐兹N·-X·胡A·-M·霍尔K·-T·丁J·F·亚努斯
Owner XEROX CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap