Electrophotographic with polycarbonate having charge transporting group
AssigneeCanon Kabushiki Kaisha
InventorsTeigo Sakakibara, Kiyoshi Sakai, Toshihiro Kikuchi, Akihiro Senoo
Life of this patent
Estimating the term…
Abstract
An electrophotographic photosensitive member is constituted by disposing a photosensitive layer on an electroconductive support. The photosensitive layer is characterized by containing a specific polycarbonate having a side chain comprising a charge-transporting group formed by nitrogen atom and benzene ring. The charge-transporting group may preferably has a specific triphenylamine structure, hydrazone structure or biphenyldiamine structure. The photosensitive layer is suitable for providing an electrophotographic apparatus showing excellent electrophotographic characteristics such as a high photosensitivity, a good potential stability in repetitive use.
Claims9
An electrophotographic photosensitive member, comprising:
- a support and a photosensitive layer comprising a charge generation layer and a charge transport layer disposed on the support, said charge transport layer comprising a polycarbonate which has a charge-transporting group having a triphenylamine structure, a hydrazone structure or a biphenylamine structure at least in a side chain, wherein
- said polycarbonate has a recurring unit represented by the following formula (A):
- ##STR62## wherein R.sub.1 to R.sub.8 are independently selected from the group consisting of hydrogen, halogen, alkyl group capable of having a substituent, alkenyl group capable of having a substituent, alkoxy group capable of having a substituent and aryl group capable of having a substituent;
- and
- one of R.sub.9 and R.sub.10 is a group containing said charge transporting group and the other group R.sub.9 or R.sub.10 is hydrogen, alkyl group capable of having a substituent, alkenyl group capable of having a substituent or aryl group capable of having a substituent;
- and both of R.sub.9 and R.sub.10 can be a group containing said charge transporting group.
An electrophotographic photosensitive member, comprising:
- a support, and a photosensitive layer containing a charge generating material and a polycarbonate which has a charge-transporting group having a triphenylamine structure, a hydrazone structure or a biphenylamine structure at least in a side chain, wherein
- said polycarbonate has a recurring unit represented by the following formula A:
- ##STR63## wherein R.sub.1 to R.sub.8 are independently selected from the group consisting of hydrogen, halogen, alkenyl group capable of having a substituent, alkyl group capable of having a substituent, alkoxy group capable of having a substituent and aryl group capable of having a substituent;
- and
- one of R.sub.9 and R.sub.10 is a group containing said charge transporting group and the other group of R.sub.9 or R.sub.10 is hydrogen, alkyl group capable of having a substituent, alkenyl group capable of having a substituent or aryl group capable of having a substituent;
- and both of R.sub.9 and R.sub.10 can be a group containing said charge transporting group.
Dependencies are inferred from the claim text.