An electrophotographic photoreceptor improved in electrostatic characteristics and image pickup and particularly excellent in the reproduction of highly precise images by the use of a liquid developer and in the image pickup according to the scanning exposure system using low-output laser beams. The photoreceptor contains a binder resin comprising at least one resin (A) containing at least 30 wt% of a polymer component of general formula (I) and 0.5 to 15 wt% of a specified polar polymer component and having a weight average molecular weight of 1x10³ to 2x10⁴ and at least one resin (B) comprising an A-B block copolymer composed of block A containing a specified polar polymer component and block B containing a polymer component of general formula (I) and having a weight-average molecular weight of 3x10⁴ to 1x10⁶. In formula (I) a¹ and a² represent each hydrogen, halogen, cyano, hydrocarbyl, or COOR⁴ optionally bonded via hydrocarbyl (wherein R⁴ represents hydrocarbyl); and R³ represents hydrocarbyl.
一种电子照相感光元件,在静电特性和图像拾取方面均有改进,尤其是在通过使用液体显影剂复制高精度图像和根据使用低输出激光束的扫描曝光系统进行图像拾取方面表现出色。感光元件含有粘合剂
树脂,粘合剂
树脂包括至少一种
树脂 (A),该
树脂含有至少 30 wt% 的通式 (I) 的聚合物成分和 0.5 至 15 wt% 的指定极性聚合物组分,且其重量平均分子量为 1x10³ 至 2x10⁴;以及至少一种
树脂 (B),该
树脂包含由含有指定极性聚合物组分的嵌段 A 和含有通式 (I) 聚合物组分的嵌段 B 组成的 A-B 嵌段共聚物,且其重量平均分子量为 3x10⁴ 至 1x10⁶。在式 (I) 中,a¹ 和 a² 分别代表氢、卤素、
氰基、烃基或通过烃基任选键合的 COOR⁴(其中 R⁴ 代表烃基);R³ 代表烃基。