Patent ID: 7901855
Filing Date: 2011-03-08
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 binder 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 polyester resin having a repeating structural unit represented by the following formula (1) and a repeating structural unit represented by the following formula (2), as a binder resin; the content of a siloxane moiety in the polyester resin is not less than 5% by mass and not more than 30% by mass relative to the total mass of the polyester resin, the siloxane moiety is a structure represented by the following formula: wherein R the content of the polyester resin in the charge transport layer is not less than 60% by mass relative to the total mass of the whole binder resin in the charge transport layer, where, in formula (1), X where, in formula (2), R