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ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS

  • US 20100092208A1
  • Filed: 12/14/2009
  • Published: 04/15/2010
  • Est. Priority Date: 07/18/2008
  • Status: Active Grant
First Claim
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1. An electrophotographic photosensitive member comprising a support, a charge generation layer provided on the support and a charge transport layer containing a charge transporting material and a resin formed on the charge generation layer, the charge transport layer serving as a surface layer of the electrophotographic photosensitive member, wherein:

  • the charge transport layer contains a charge transporting material, a polyester resin A having a repeating structural unit represented by the following formula (1) and a repeating structural unit represented by the following formula (2), and at least one of polyester resin C having a repeating structural unit represented by the following formula (C) and polycarbonate resin D having a structural unit represented by the following formula (D);

    the content of a siloxane moiety in the polyester resin A is not less than 10% by mass and not more than 40% by mass relative to the total mass of the polyester resin A; and

    the charge transport layer has a matrix-domain structure having a matrix formed of the charge transporting material and at least one of the polyester resin C and the polycarbonate resin D, and a domain formed of the polyester resin A in the matrix,

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