公开(公告)号：US10273331B2

公开(公告)日：2019-04-30

申请号：US15824745

申请日：2017-11-28

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Kenji Kitaguchi ,  Kensuke Okawa ,  Seiki Hasunuma ,  Tomofumi Shimizu

IPC: G03G5/05 ,  G03G5/06 ,  C08G63/19 ,  C08G63/181 ,  C08L67/02

Abstract: A polyarylate resin is represented by general formula (1) shown below. In general formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom or a methyl group. r and s each represent an integer of at least 0 and no greater than 49. t and u each represent an integer of at least 1 and no greater than 50. r+s+t+u=100. r+t=s+u. X and Y each represent, independently of one another, a divalent group represented by chemical formula (1-1), chemical formula (1-2), chemical formula (1-3), or chemical formula (1-4). X and Y are different from one another.

公开(公告)号：US10761439B2

公开(公告)日：2020-09-01

申请号：US15668759

申请日：2017-08-04

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Kensuke Okawa ,  Seiki Hasunuma ,  Tomofumi Shimizu

IPC: G03G5/06 ,  G03G5/05 ,  C08G63/185 ,  C08G63/193 ,  C08G63/189

Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, and a binder resin. The binder resin contains a polyarylate resin represented by general formula (1). In general formula (1), r and s each represent an integer of at least 0 and no greater than 49 and t and u represents an integer of at least 1 and no greater than 50. Furthermore, r+s+t+u=100 and r+t=s+u. X and Y each represent, independently of one another, a divalent group represented by chemical formula (1-1), (1-2), (1-3), or (1-4).