| 摘要 |
PURPOSE:To obtain a durable electrophotographic sensitive body usable as a positive electrification type, improved in sensitivity and superior in scratching resistance and ozone resistance by incorporating a specified compound in a photosensitive layer containing an electric charge generating material and a charge transfer material. CONSTITUTION:The photosensitive layer of the electrophotographic sensitive body formed on a conductive substrate contains the charge generating material and the charge transfer material as essential components, and moreover, the compound represented by the formula shown on the right in which each of R1-R4 is H, alkyl, cycloalkyl, or aryl, and R1 and R2, R3 and R4 are not simultaneously H, and X is O or S. This compound is added in an amount not fixed and dependent on the layer structure of the photosensitive body and the kind of the charge transfer material, but it is used, preferably, in an amount of 5-25wt% of the charge transfer material. It may be added to the charge generating layer or the charge transfer layer of the laminate type photosensitive body, or the monolayer type photosensitive layer, or a protective layer, or plural layers of them, and the photosensitive body having a laminate structure of the upper charge generating layer and the lower charge transfer layer exhibits a more remarkable effect, thus permitting drop of potential in corona charging in the presence of ozone to be remarkably improved and deterioration of sensitivity to be made negligibly small. |
