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Image bearing member, image forming method, image forming apparatus and process cartridge

A technology of photoreceptor and photosensitive layer, which is applied in the direction of electric recording process applying charge pattern, electric recording process applying electric charge pattern, equipment of electric recording process applying electric charge pattern, etc. It is difficult to obtain the wear resistance and charge transporting cross-linked surface layer, etc., to achieve the effect of excellent gas resistance, good electrical properties, and high wear resistance

Active Publication Date: 2008-12-10
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these radically reactive compounds that can satisfy these requirements are difficult to find, and it is difficult to obtain a crosslinked surface layer having both abrasion resistance and charge transport properties and an electrophotographic photoreceptor including the same.

Method used

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  • Image bearing member, image forming method, image forming apparatus and process cartridge
  • Image bearing member, image forming method, image forming apparatus and process cartridge
  • Image bearing member, image forming method, image forming apparatus and process cartridge

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0224] (Preparation of 4-p-xylylaminophenyl boronic acid)

[0225] Add 15.00g of 4-bromo4',4"-dimethyltriphenylamine and 100ml of dehydrated tetrahydrofuran to the reaction vessel equipped with a stirring device, a thermometer and a dropping funnel. - 25ml of 2.6M hexane solution of butyllithium was slowly dropped, and thereafter, a solution composed of 13.32g of trimethoxy borohydride and 5ml of dehydrated tetrahydrofuran was slowly dropped. After stirring for 3 hours under cooling , return to room temperature. 100ml of aqueous hydrochloric acid solution of 3N is added, at room temperature, after carrying out 2 hours hydrolysis, extract with ethyl acetate, the organic layer is washed with water. Thereafter, solvent is removed, and crystallization is washed with hexane to obtain The crude product was recrystallized with a mixed solvent of cyclohexane / toluene to obtain crystals of the target product.

[0226] (yield 6.27g, melting point above 250°C)

[0227] (3) Synthesis exa...

Embodiment 1

[0297] On an aluminum cylinder with a diameter of 30mm, apply the coating solution for the lining layer, the coating solution for the charge generating layer, and the coating solution for the charge transporting layer of the following composition sequentially, and dry to form a lining layer of 3.5 μm and a charge of 0.2 μm Generation layer, 15 μm charge transport layer. On the charge transport layer, spray-coat the cross-linked surface layer coating solution with the following composition, and after 20 minutes of natural drying, in the methyl halide lamp: 160W / cm, irradiation distance: 120mm, irradiation intensity: 500mW / cm 2, Irradiation time: light irradiation was performed under the condition of 120 seconds to harden the coating film. Further, drying was performed at 130° C. for 20 minutes to obtain a crosslinked surface layer of 12 μm, whereby the electrophotographic photoreceptor of the present invention was obtained.

[0298] [Liner Coating Fluid]

[0299] ・Alkyd resin...

Embodiment 2

[0327] An electrophotographic photoreceptor was produced in the same manner as in Example 1 except that the crosslinked surface layer coating solution in Example 1 was changed to the following composition.

[0328] 【0105】

[0329] [Cross-linked surface layer coating solution]

[0330] · Radical reactive compound of the above structural formula (exemplary compound No. 3): 10 parts ·

[0331] Monomers having 3 or more radically polymerizable functional groups: 10 units

[0332] Trimethylhydroxypropane triacrylate

[0333] (KAYARAD TMPTA, manufactured by Nippon Kayaku)

[0334] ・Photopolymerization initiator: 1 part

[0335] 1-Hydroxycyclohexylphenyl ketone (referred to as Luca Cochua (Gigakyua) 184, made by Spaspert Chemical)

[0336] · Tetrahydrofuran: 100 parts

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Abstract

A high durable, high functioned electrophotographic photoreceptor excellent in wearing resistance and in electric properties, and further excellent in environmental suitability is disclosed, More particularly, the electrophotographic photoreceptor includes a cross-linked surface layer that is formed by using a particular free radical reactive compound, and the invention still, even if the cross-linked surface layer is thick, has less variation of electric potention at exposure portions while maintaining high abrasion resistance, include high stability to warm-humid environments and oxidant gases generated by a charged device, and is not liable to occur variation of image concentration, image flowing and inferior resolution. In addition, High quality for images can be realized in a long term using high durable and high stable photoreceptor with long service life. The inventive electrophotographic photoreceptor includes on the conductive support the cross-linked surface layer that at least comprises charge conveying hardening substances, the hardening substances of the cross-linked surface layer includes at least materials of a structural unit represented by the formula (A), In the formula, R1-R5 and R1'-R5' can be the same or different, representing hydrogen atoms, alkyl having 1-4 of carbons, alkoxy having 1-4 of carbons, R6 represents hydrogen atom or methyl, X represents linear chain having 2-5 of carbons or alkylene having branched chain.

Description

technical field [0001] The present invention relates to an organic electrophotographic photoreceptor having extremely high abrasion resistance. Further, the present invention relates to an electrophotographic photoreceptor excellent in high-speed responsiveness. In addition, the present invention also relates to an image forming method using a long-life, high-sensitivity electrophotographic photoreceptor, an image forming apparatus, and a process cartridge for an image forming apparatus. Background technique [0002] In recent years, organic photoreceptors (OPCs) have been widely used in copiers, facsimile machines, laser printers and compound machines instead of inorganic photoreceptors because of their good performance and various advantages. Reasons for this include (1) optical characteristics such as wide light absorption wavelength range and large absorption amount, (2) electrical characteristics such as high sensitivity and stable charging characteristics, (3) wide se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/05G03G13/00G03G15/00G03G21/18
Inventor 永井一清堀内保铃木哲郎生野弘李洪国森信哉
Owner RICOH KK