| 摘要 |
PURPOSE:To obtain an electrophotographic sensitive body high in sensitivity and kept in extremely low in residual potential even in long period uses by incorporating a specified polycyclic quinone type pigment in an electrostatic charge generating layer and a specified hydrazone type compd. in a charge transfer layer. CONSTITUTION:The charge generating layer is formed by coating a conductive substrate with a coating soln. prepared by dispersing one of the polycyclic quinone type pigments represented by formula I into the org. solvent soln. of a binder resin, and drying it, or by vapor depositing this pigment in a vacuum system. The electrophotographic sensitive body extremely high in sensitivity and superior in durability can be obtained mixing the hydrazone compd. with the soln. of the binder resin, dissolving it, coating the charge generating layer with the soln., and drying it to form the charge transfer layer on the charge generating layer. This hydrazone type charge transfer material is represented by formula II in which each of R1-R4 is H or halogen, R5 is H, alkyl, or alkoxy, and each of R6, R7 is a residue capable of forming a 5- or 6-membered ring together with an optionally substd. alkyl, aralkyl, phenyl, or N atom. |
