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Electrophotographic photoconductor, and image forming method, image forming apparatus, and process cartridge for image forming apparatus using the electrophotographic photoconductor

A photoconductor and electrophotography technology, applied in optics, electrical recording, instruments, etc., can solve the problems of degradation of photoconductor charge transport function, difficulty in forming sufficient cross-linking density, loss of photoconductivity of photoconductor, etc., to achieve long-term Lifetime, Effects of Excellent Cost-Performance

Inactive Publication Date: 2013-04-10
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is conventionally known that the addition of an ultraviolet absorber brings a large negative effect on the charge transport function, which causes the problem of significant degradation of the charge transport function of the photoconductor and it simultaneously inhibits radical polymerization and makes it difficult to form a photoconductor with sufficient crosslink density. The problem of the protective layer
Therefore, the incorporation of UV absorbers into the protective layer of photoconductors has not been applied in practice.
[0010] In addition, singlet oxygen quenchers (for example, nickel dithiolate complexes) are known as additives for suppressing pigment decomposition reactions, however, when such substances are added to the protective layer, It has the disadvantage that photoconductors completely lose their photoconductivity, making it impossible to use them

Method used

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  • Electrophotographic photoconductor, and image forming method, image forming apparatus, and process cartridge for image forming apparatus using the electrophotographic photoconductor
  • Electrophotographic photoconductor, and image forming method, image forming apparatus, and process cartridge for image forming apparatus using the electrophotographic photoconductor
  • Electrophotographic photoconductor, and image forming method, image forming apparatus, and process cartridge for image forming apparatus using the electrophotographic photoconductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0180] To an aluminum cylinder having a diameter of 60 mm and whose surface has been ground and polished by a dipping method, an undercoat coating liquid, a charge generating layer coating liquid, and a hole each containing the following compositions were applied in this order The transport layer coating liquid was then dried to form an undercoat layer with a thickness of 3.5 μm, a charge generation layer with a thickness of 0.2 μm, and a hole transport layer with a thickness of 22 μm. On the hole transport layer, a hole transport-protective layer coating solution containing the following composition-wherein 5% by mass of The azole compound has been added to the radically polymerizable hole transport compound to coat the hole transport layer, followed by natural drying for 20 minutes. Subsequently, the aluminum cylinder was irradiated by light under the following conditions: metal halide lamp: 160W / cm, irradiation distance: 120mm, irradiation intensity: 500mW / cm 2 , and irra...

Embodiment 2

[0229] An electrophotographic photoconductor was prepared in the same manner as in Example 1, except that the hole transport material (HTM-1) and the radical polymerizable hole transport compound (RHTM-1) were replaced by holes respectively represented by the following structural formulas In addition to transport materials (HTM-2) and radically polymerizable hole transport compounds (RHTM-2), and, The azole compound embodiment (4) is used as azole compounds.

[0230]

[0231] (HTM-2)-structural formula

[0232]

[0233] (RHTM-2)-structural formula

Embodiment 3

[0235] An electrophotographic photoconductor was prepared in the same manner as in Example 2, except that the radical polymerizable hole transport compound (RHTM-2) was replaced by the radical polymerizable hole transport compound (RHTM-3) having the following structural formula outside, and, The azole compound embodiment (6) is used as azole compounds.

[0236]

[0237] (RHTM-3)-structural formula

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Abstract

The invention provides an electrophotographic photoconductor including a conductive support, a charge generating layer, a hole transporting layer, and a hole transporting-protective layer, these layers being laminated in this order on the conductive support, wherein the hole transporting-protective layer contains a three-dimensionally crosslinked product which is obtained through chain polymerization of at least a radical polymerizable hole-transporting compound by irradiating the radical polymerizable hole-transporting compound with an active energy beam, and wherein the hole transporting-protective layer contains an oxazole compound represented by General Formula (1) or (2) below.

Description

technical field [0001] The present invention relates to an image forming method and an image forming apparatus, both of which utilize an electrophotographic method, allowing on-demand printing in the field of commercial printing, and to an electrophotographic photoconductor and a process cartridge for an image forming apparatus therefor. Background technique [0002] Recently, electrophotographic image forming apparatuses widely spread in offices are increasingly widely used in the field of commercial printing because they are easy to print on demand. In the field of commercial printing, high speed printing, large output printing, high quality images, paper responsiveness and low production cost of printed matter are required more than ever. [0003] In order to realize high-speed printing, mass output printing, and low production cost of printed matter, it is required that electrophotographic photoconductors, the main devices for electrophotography, have a long operating li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G5/147
CPCG03G5/0521G03G5/14708G03G5/14791G03G5/14795G03G5/0644G03G5/0661G03G5/14717G03G5/072G03G21/18G03G5/147G03G5/0648
Inventor 永井一清铃木哲郎李洪国
Owner RICOH KK
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