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Electrophotographic photoconductor for wet developing and image-forming apparatus for wet developing

A technology of electrophotography and photoreceptor, applied in the direction of developer, optics, electrography, etc., can solve the problem of being easily soaked, and achieve the effect of improving solvent resistance

Inactive Publication Date: 2006-02-01
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, conventional electrophotographic photoreceptors for wet development have the problem of being easily soaked by liquid developers called isoparaffin solvents when used for a long period of time.

Method used

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  • Electrophotographic photoconductor for wet developing and image-forming apparatus for wet developing
  • Electrophotographic photoconductor for wet developing and image-forming apparatus for wet developing
  • Electrophotographic photoconductor for wet developing and image-forming apparatus for wet developing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0212] (1) Preparation of electrophotographic photoreceptor for wet development

[0213] In the ultrasonic disperser, 4 parts by weight of X-type metal-free phthalocyanine (CGM-1), which is one of the compounds represented by formula (3), as a charge generating agent; 19) 40 parts by weight of a diphenylvinylamine compound (HTM-1) as one of the compounds represented; 40 parts by weight of a naphthoquinone derivative (ETM-1) as one of the compounds represented by the formula (8) as an electron transport agent Parts by weight; 100 parts by weight of a polycarbonate resin (Resin-1) with a viscosity average molecular weight of 50,000 represented by the following formula (20); as a leveling agent, dimethyl silicone oil KF-96- 50CS (manufactured by Shin-Etsu Chemical Industry) 0.1 parts by weight; 750 parts by weight of tetrahydrofuran as a solvent. Then, it was mixed and dispersed by ultrasonic treatment for 60 minutes to prepare a coating liquid.

[0214] The obtained coating solution...

Embodiment 2～10 and comparative example 1～3

[0239] In Examples 2 to 10, the positive hole transport agent represented by the formula (19) shown in Table 1, the electron transport agent represented by the formula (8), and the electron transport agent represented by the following formula (23) were used, respectively. Except for the binder resin, in the same manner as in Example 1, a single-layer type electrophotographic photoreceptor for wet development was prepared and evaluated.

[0240] In addition, in Comparative Examples 1 to 3, in addition to the amine compound (HTM-36) represented by the following relational formula (21), the electron transport agent (ETM-10 and 11) represented by the following relational formula (22), Except for the binder resins (Resin-2 to 5) represented by the following relational expression (23), in the same manner as in Example 1, a single-layer type electrophotographic photoreceptor for wet development was prepared and evaluated. In addition, the viscosity average molecular weights of the binder...

Embodiment 11～22

[0252] In Examples 11-22, the single-layer electrophotographic photoreceptors for wet development obtained in Examples 1 to 4 were used instead of the isoparaffin solvent L used as the developer for wet development, and isoparaffin solvent G was used respectively. , Isoparaffin solvent H, Norpar12, respectively evaluated the above-mentioned solvent resistance test and sensitivity change. The results obtained are shown in Table 3, respectively.

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Abstract

Provided are an electrophotographic photoconductor for wet developing excellent in solvent resistance having a photoconductor improved in not only solvent resistance but also charging characteristics even after long-term usage, and an image-forming apparatus equipped with such an electrophotographic photoconductor for wet developing. Therefore, an electrophotographic photoconductor for wet developing equipped with an organic photoconductor containing at least a binder resin, a charge-generating agent, a hole-transfer agent and an electron-transfer agent, where the amount of elution of the hole-transfer agent after 2,000-hour-immersion in paraffin solvent having a kinematic viscosity (25 DEG C, in accordance with ASTM D455) of 1.4 to 1.8 mm 2 / s is 0.040 g / m 2 or less or the amount of elution of the electron-transfer agent after 2,000-hour-immersion in paraffin solvent having a kinematic viscosity (25 DEG C, in accordance with ASTM D455) of 1.4 to 1.8 mm 2 / s is 0.12 g / m 2 or less.

Description

Technical field [0001] The present invention relates to an electrophotographic photoreceptor for wet development and an image forming apparatus for wet development, in particular to an electrophotographic photoreceptor for wet development with excellent solvent resistance and a wet development image provided with such an electrophotographic photoreceptor for wet development Forming device. Background technique [0002] Conventionally, as electrophotographic photoreceptors for wet development used in image forming apparatuses, etc., organic photoreceptor materials composed of charge transport agents (positive hole transport agents, electron transport agents), charge generators, and binder resins have been used as electrophotographic photoreceptors. Photoreceptors are widely used. Compared with conventional inorganic photoreceptors, this organic photoreceptor has the advantages that it is easy to manufacture and structure, and it is also easy to perform wet development using a liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/06G03G5/05
CPCG03G5/047G03G5/04G03G5/05G03G5/06G03G9/12
Inventor 东润冈田英树
Owner KYOCERA DOCUMENT SOLUTIONS INC
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