| 摘要 |
PURPOSE:To improve solvent resistance, strength, heat resistance, wear resistance and the adhesiveness to the substrate or other layers of a photosensitive body by forming an electric charge transfer layer of a layer formed by mixing a specific electric charge transfer material with an ester binder resin. CONSTITUTION:The electric charge transfer layer consists of the layer formed by mixing the electric charge transfer material expressed by the formula I with the ester binder resin. In the formula I, R1 denotes an alkyl group, R2 and R3 are independent from each other and respectively denote a hydrogen atom, alkyl group, alkoxy group, halogen atom, alkoxy carbonyl group or substd. amino group. The benzidine deriv. expressed by the formula I is different from the benzidine deriv. used heretofore as the electric charge transfer material in that said deriv. has a halogen atom in the ortho position of both amino groups and that said deriv. has excellent oxidation resistance. The adhesiveness of the substrate and the charge transfer layer under said substrate is thereby improved and the need for providing an adhesive layer is eliminated in the case of the photosensitive body for electric charge to a positive polarity. Since the charge transfer layer has the solvent resistance, the disturbance of the layer boundary is obviated at the time of coating an electric charge generating layer on said layer. The good electrical characteristics are thud obtd. |
