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Coating liquid for undercoating layer formation in electrophotographic photoreceptor, and process for producing the same

A technology of electrophotography and manufacturing method, applied in optics, electrical recording, instruments, etc., can solve problems such as insufficient performance, and achieve the effects of high charging potential and sensitivity, uniform film thickness, and excellent electrical characteristics

Active Publication Date: 2009-05-13
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art, there are many performance inadequacies in terms of the image and the stability of the coating solution during production, which are required to form higher-quality images.

Method used

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  • Coating liquid for undercoating layer formation in electrophotographic photoreceptor, and process for producing the same
  • Coating liquid for undercoating layer formation in electrophotographic photoreceptor, and process for producing the same
  • Coating liquid for undercoating layer formation in electrophotographic photoreceptor, and process for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0341] The rutile titanium dioxide ("TTO55N" manufactured by Ishihara Sangyo Co., Ltd.) with an average primary particle diameter of 40 nm and methyldimethoxysilane ("TSL8117" manufactured by Toshiba Silicone Co., Ltd.) weighing 3% by weight of the titanium dioxide were used Scheer mixer mixed to obtain surface-treated titanium dioxide, 90 parts of the obtained surface-treated titanium dioxide, 30 parts of methanol (hereinafter sometimes referred to as "MeOH"), 60 parts of tetrahydrofuran (hereinafter sometimes referred to as "THF ") mixed to form a raw material slurry, using zirconia beads (YTZ manufactured by NIKKATO Co., Ltd.) with an average particle diameter of about 100 μm as a dispersion medium, and using a mill volume of about 0.15L ULTRAAPEX MILL manufactured by Kotobukiya Co., Ltd. (UAM- Model 015), 1 kg of the raw material slurry was subjected to a dispersion treatment for 1 hour under a liquid circulation state with a rotor circumferential speed of 10 m / sec and a liqui...

Embodiment 2

[0352] As a dispersion medium when dispersing by ULTRA APEX MILL, zirconia beads (manufactured by NIKKATO, YTZ) with an average particle diameter of about 50 μm were used. Except for this, the same procedure as in Example 1 was carried out to produce the "undercoat layer forming coating"液SE2". In SE2, the cumulative 90% particle size of the metal oxide particles is 0.12 μm.

Embodiment 3

[0354]A mixture of 30 parts of melamine resin, 80 parts of n-butanol, 36 parts of paraformaldehyde, and 0.03 parts of 1N hydrochloric acid aqueous solution was reacted for 2 hours under reflux dehydration at a temperature of 100°C. The n-butanol was distilled off to obtain a solid content of 50 weight. % Of resin liquid. The "titanium dioxide dispersion TB1" was mixed with the resin solution and 0.25 parts of dinonylnaphthalenedisulfonic acid to dissolve it, and then filtered with a PTFE membrane filter (manufactured by ADVANTEC Corporation, Mitex LC) with a pore size of 5 μm to prepare the following final Composition "Coating Solution SE3 for Undercoat Layer Formation". In SE3, the cumulative 90% particle size of the metal oxide particles is 0.13 μm.

[0355] Curable binder resin 30 parts

[0356] 90 parts of surface-treated titanium dioxide

[0357] MeOH 30 parts

[0358] 60 parts of THF

[0359] BuOH 30 parts

[0360] Solid content concentration 50%

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Abstract

This invention provides a coating liquid for undercoating layer formation having high stability, a high-performance electrophotographic photoreceptor, which can form high-quality images even under various service environments and is less likely to develop image defects such as black points, color points, and fogging, an image forming apparatus using the photoreceptor, and an electrophotographic cartridge using the photoreceptor. The coating liquid for undercoating layer formation for an electrophotographic photoreceptor comprises metal oxide particles and a curable binder resin and is characterized in that the volume average particle diameter Mv of the metal oxide particles in the coating liquid as measured by a dynamic light scattering method is not more than 0.1 [mu]m. Alternatively, the coating liquid for undercoating layer formation for an electrophotographic photoreceptor is characterized in that the volume average particle diameter Mv is not more than 0.1 [mu]m and the ratio between the volume average particle diameter Mv and the number average particle diameter Mp, i.e., Mv / Mp, satisfies the following formula (1). Formula (1) 1.10<=Mv / Mp<=1.40.

Description

Technical field [0001] The present invention relates to a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor, and a method for producing a coating solution for forming an undercoat layer used when forming an undercoat layer of an electrophotographic photoreceptor by coating and drying. A photoreceptor having a photosensitive layer on an undercoat layer formed by applying the coating liquid produced by this method, an imaging device using the photoreceptor, and an electrophotographic cartridge using the photoreceptor. An electrophotographic photoreceptor having a photosensitive layer on an undercoat layer formed by coating and drying the coating solution for forming an undercoat layer of the present invention can be suitably used in electrophotographic printers, facsimiles, copiers, and the like. Background technique [0002] Since electrophotographic technology can obtain instant, high-quality images, etc., this technology is being widely used n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/14G03G5/00
CPCG03G5/144
Inventor 三森光幸石尾耕三渕上宏惠
Owner MITSUBISHI RAYON CO LTD
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