Patent ID: 7875410
Filing Date: 2011-01-25
Classification: G03G

Abstract:
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, where, in formula (1), X in the above formula (1) where, in formula (2), R where, in formula (C), R where, in formula (D), R