申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0411192A1
公开(公告)日:1991-02-06
An electrophotographic photoreceptor comprising an electroconductive layer and a photosensitive layer disposed on one surface of the electroconductive substrate, the photosensitive layer containing a specific polycarbonate or polycarbonate copolymer used as a binder-resin, has such advantageous characteristics that it can be produced by using an application method without accompanying whitening (gelation) of the coating liquid used for forming the photosensitive layer nor inviting occurrence of solvent-cracks in the formed photosensitive layer.
In addition, it excels in mechanical strength and the characteristics required in electrophotography which can be maintained even if it is repeatedly used over long periods.
The specific polycarbonate or polycarbonate copolymer comprises units of formula I
wherein
X¹ in the formula [I] is
R¹ and R² each independently being hydrogen atom, an alkyl group having a carbon number of 1 to 6 or an aryl group having a carbon number of 6 to 12,
n being an integer of 4 to 10, (̵CH₂)̵, p being an integer of 2 to 10, a single bond, -O-, -S-, -SO-, or -SO₂-;
一种电子照相感光器由导电层和设置在导电基板一个表面上的感光层组成,感光层含有用作粘合剂-树脂的特定聚碳酸酯或聚碳酸酯共聚物,该感光器具有以下优点:使用涂敷方法生产时,用于形成感光层的涂敷液不会变白(凝胶化),形成的感光层也不会出现溶剂裂纹。
此外,它还具有出色的机械强度和电子照相所需的特性,即使长期反复使用也能保持。
特定的聚碳酸酯或聚碳酸酯共聚物由式 I 的单元组成
其中
式 [I] 中的 X¹ 是
R¹ 和 R² 各自独立地为氢原子、碳原子数为 1-6 的烷基或碳原子数为 6-12 的芳基、
n 为 4 至 10 的整数、(̵CH₂)̵、p 为 2 至 10 的整数、单键、-O-、-S-、-SO- 或 -SO₂-;