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CN-122018262-A - Electrophotographic photoreceptor, process cartridge, and image forming apparatus

CN122018262ACN 122018262 ACN122018262 ACN 122018262ACN-122018262-A

Abstract

An electrophotographic photoreceptor, a process cartridge, and an image forming apparatus, the electrophotographic photoreceptor including a conductive substrate, and a photosensitive layer disposed on the conductive substrate, wherein an outermost layer includes a charge transport material, a polyarylate resin, and a silicone oil, the silicone oil is contained in an amount of 0.001ppm to 15000.000ppm relative to the outermost layer, and a residual amount of an aromatic carboxylic acid halide per unit mass of the outermost layer is 15X 10 ‑ 8 mol/g or less.

Inventors

  • Kiko Youchi
  • IDE KENTA
  • NARITA KOSUKE
  • OYAMADA YUKI
  • GAO YANGPING
  • KANO FUYUKI
  • Kusano Kawoo
  • SASAKI TOMOYA
  • FUJII RYOUSUKE
  • Okazaki Youdu
  • IWASAKI MASAHIRO

Assignees

  • 富士胶片商业创新有限公司

Dates

Publication Date
20260512
Application Date
20250925
Priority Date
20241111

Claims (9)

  1. 1. An electrophotographic photoreceptor comprising: Conductive matrix, and A photosensitive layer disposed on the conductive substrate, The outermost layer contains charge transport material, polyarylate resin and silicone oil, The content of the silicone oil is 0.001ppm or more and 15000.000ppm or less relative to the outermost layer, and the residual amount of the aromatic carboxylic acid halide per unit mass of the outermost layer is 15×10 -8 mol/g or less.
  2. 2. The electrophotographic photoreceptor according to claim 1, wherein, The content of silicone oil in the outermost layer is 0.010ppm or more and 10000.000ppm or less.
  3. 3. The electrophotographic photoreceptor according to claim 2, wherein, The content of silicone oil in the outermost layer is 10.000ppm or more and 500.000ppm or less.
  4. 4. The electrophotographic photoreceptor according to any of claim 1 to 3, wherein, The outermost layer further comprises a polycarbonate resin.
  5. 5. The electrophotographic photoreceptor according to any of claims 1 to 4, wherein, The polyarylate resin has a dicarboxylic acid unit represented by the following formula (A) and a diol unit represented by the following formula (B), [ Chemical formula 1] (A) (B) In the formula (a), ar A1 and Ar A2 are each independently an aromatic ring which may have a substituent, L A is a single bond or a 2-valent linking group, and n A1 is 0,1 or 2; in the formula (B), ar B1 and Ar B2 are each independently an aromatic ring which may have a substituent, L B is a single bond, an oxygen atom, a sulfur atom or-C (Rb 1 )(Rb 2 )-,n B1 is 0,1 or 2; rb 1 and Rb 2 are each independently a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, or Rb 1 and Rb 2 may be bonded to form a cyclic alkyl group.
  6. 6. The electrophotographic photoreceptor according to claim 4 or 5, wherein, The polyarylate resin and the polycarbonate resin each have a structural unit comprising biphenyl represented by the following formula (BP), [ Chemical formula 2] (BP) In the formula (BP), j is an integer of 0 to 4, j R 1 are each independently methyl or ethyl, k is an integer of 0 to 4, and k R 2 are each independently methyl or ethyl.
  7. 7. The electrophotographic photoreceptor according to any of claims 1 to 6, wherein, The silicone oil contains at least one selected from the group consisting of ether-modified silicone oil, silicone grafted acrylic polymer, and cyclic siloxane compound.
  8. 8. A process cartridge provided with the electrophotographic photoreceptor as claimed in any one of claim 1 to 7, The process cartridge is attached to and detached from the image forming apparatus.
  9. 9. An image forming apparatus includes: The electrophotographic photoreceptor of any one of claims 1 to 7; A charging device for charging a surface of the electrophotographic photoreceptor; An electrostatic latent image forming device that forms an electrostatic latent image on a surface of the charged electrophotographic photoreceptor; a developing device for developing an electrostatic latent image formed on the surface of the electrophotographic photoreceptor by a developer containing a toner to form a toner image, and And a transfer device for transferring the toner image onto the surface of the recording medium.

Description

Electrophotographic photoreceptor, process cartridge, and image forming apparatus Technical Field The invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. Background Patent document 1 discloses a method for producing an organic electrophotographic photoreceptor by spraying an organic electrophotographic photosensitive layer onto a conductive substrate, wherein the organic electrophotographic photosensitive layer-forming coating liquid contains at least a binder resin and 0.002 to 0.01 parts by weight of a silicone leveling agent based on 100 parts by weight of the binder resin. Patent document 2 discloses an electrophotographic photoreceptor in which a charge generation layer and a charge transport layer are laminated in this order on a conductive support, wherein the charge transport layer contains an ethoxy-modified silicone oil. Patent document 1 Japanese patent laid-open No. 08-292584 Patent document 2 Japanese patent laid-open No. H07-128879 Disclosure of Invention The object of the present embodiment is to provide an electrophotographic photoreceptor having a conductive substrate and a photosensitive layer disposed on the conductive substrate, wherein the outermost layer contains a charge transport material, a polyarylate resin and a silicone oil, and wherein the content of the silicone oil in the outermost layer is less than 0.001ppm or more than 15000.000ppm, or wherein the amount of an aromatic carboxylic acid halide in the outermost layer exceeds 15×10 -8 mol/g per unit mass of the outermost layer, as compared with an electrophotographic photoreceptor having a reduced surface roughness due to coating defects in the outermost layer. Specific means for solving the above problems include the following means. The formulae are the same as those of the same numbers described below. <1> An electrophotographic photoreceptor comprising: Conductive matrix, and A photosensitive layer disposed on the conductive substrate, The outermost layer contains charge transport material, polyarylate resin and silicone oil, The content of the silicone oil is 0.001ppm or more and 15000.000ppm or less relative to the outermost layer, and the residual amount of the aromatic carboxylic acid halide per unit mass of the outermost layer is 15×10 -8 mol/g or less. <2> The electrophotographic photoreceptor according to the <1>, wherein, The content of silicone oil in the outermost layer is 0.010ppm or more and 10000.000ppm or less. <3> The electrophotographic photoreceptor according to the <2>, wherein, The content of silicone oil in the outermost layer is 10.000ppm or more and 500.000ppm or less. <4> The electrophotographic photoreceptor according to any one of <1> to <3>, wherein, The outermost layer further comprises a polycarbonate resin. <5> The electrophotographic photoreceptor according to any one of <1> to <4>, wherein, The polyarylate resin has a dicarboxylic acid unit represented by the following formula (A) and a diol unit represented by the following formula (B), [ Chemical formula 1] In the formula (a), ar A1 and Ar A2 are each independently an aromatic ring which may have a substituent, L A is a single bond or a 2-valent linking group, and n A1 is 0,1 or 2; in the formula (B), ar B1 and Ar B2 are each independently an aromatic ring which may have a substituent, L B is a single bond, an oxygen atom, a sulfur atom or-C (Rb 1)(Rb2)-,nB1 is 0,1 or 2; rb 1 and Rb 2 are each independently a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 12 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, or Rb 1 and Rb 2 may be bonded to form a cyclic alkyl group. <6> The electrophotographic photoreceptor according to <4> or <5>, wherein, The polyarylate resin and the polycarbonate resin each have a structural unit comprising biphenyl represented by the following formula (BP), [ Chemical formula 2] In the formula (BP), j is an integer of 0 to 4, j R 1 are each independently methyl or ethyl, k is an integer of 0 to 4, and k R 2 are each independently methyl or ethyl. <7> The electrophotographic photoreceptor according to any one of <1> to <6>, wherein, The silicone oil contains at least one selected from the group consisting of ether-modified silicone oil, silicone grafted acrylic polymer, and cyclic siloxane compound. <8> A process cartridge comprising the electrophotographic photoreceptor of any one of <1> to <7>, The process cartridge is attached to and detached from the image forming apparatus. <9> An image forming apparatus, comprising: The electrophotographic photoreceptor of any one of <1> to <7 >; A charging device for charging a surface of the electrophotographic photoreceptor; An electrostatic latent image forming device that forms an electrostatic latent image on a surface of the charged electrophotographic photoreceptor; a developing device for developing an electrostatic latent image formed on the surface of the electr