POLYCARBONATE COPOLYMER, AND COATING LIQUID AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE BODY USING SAME
申请人:Idemitsu Kosan Co., Ltd
公开号:EP2799461A1
公开(公告)日:2014-11-05
Provided are a polycarbonate copolymer, comprising: a repeating unit A represented by the following general formula (1); a repeating unit B represented by the following general formula (2); and a repeating unit C represented by the following general formula (3), in which: the polycarbonate copolymer has a presence ratiorepresentedbyAr1/(Ar1+Ar2+Ar3) of from 50 to 65 mol%, apresence ratio represented by Ar2/(Ar1+Ar2+Ar3) of from 25 to 45 mol%, and a presence ratio represented by Ar3/(Ar1+Ar2+Ar3) of from 3 to 25 mol%; and the repeating units B are not directly bonded to each other, and a coating liquid and an electrophotographic photosensitive body each obtained by using the copolymer, and as a result, provided are a polycarbonate copolymer remarkably improved in abrasion resistance while maintaining its stable solubility in an organic solvent, and a coating liquid and an electrophotographic photosensitive body each obtained by using the copolymer:
in the formulae, Ar1, Ar2, and Ar3 each independently represent a divalent aromatic group, and X1 and X2 each independently represent a single bond or -NH-, provided that Ar1 and Ar2 are not identical to each other.
本发明提供了一种聚碳酸酯共聚物,包括:由以下通式(1)表示的重复单元 A;由以下通式(2)表示的重复单元 B;以及由以下通式(3)表示的重复单元 C,其中:聚碳酸酯共聚物的 Ar1/(Ar1+Ar2+Ar3)含量比为 50 至 65 摩尔%,Ar2/(Ar1+Ar2+Ar3)含量比为 25 至 45 摩尔%,Ar3/(Ar1+Ar2+Ar3)含量比为 3 至 25 摩尔%;和重复单元 B 之间不直接键合,以及使用该共聚物分别获得的涂布液和电子照相感光体,从而提供了一种在保持其在有机溶剂中的稳定溶解性的同时显著提高耐磨性的聚碳酸酯共聚物,以及使用该共聚物分别获得的涂布液和电子照相感光体:
式中,Ar1、Ar2 和 Ar3 各自独立地代表二价芳香族基团,X1 和 X2 各自独立地代表单键或-NH-,条件是 Ar1 和 Ar2 彼此不相同。