公开(公告)号：US20200026207A1

公开(公告)日：2020-01-23

申请号：US16496487

申请日：2017-12-28

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kensuke OKAWA ,  Seiki HASUNUMA ,  Jun AZUMA

IPC: G03G5/06 ,  G03G5/07 ,  G03G15/00

Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3) disposed directly or indirectly on the conductive substrate (2). The photosensitive layer (3) has a charge generating layer (3a) and a charge transport layer (3b) disposed in order from the conductive substrate (2). The charge generating layer (3a) contains a charge generating material. The charge transport layer (3b) contains a charge transport material, a binder resin, and a pigment that absorbs light having an irradiation wavelength. The binder resin includes a polyarylate resin including a repeating unit represented by general formula (1): In general formula (1), 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): The pigment is a naphthalocyanine compound represented by general formula (2) or (3):

公开(公告)号：US20180148538A1

公开(公告)日：2018-05-31

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

CPC classification number: C08G63/19 ,  C08G63/181 ,  C08L67/025 ,  C08L2203/16 ,  G03G5/056 ,  G03G5/0567 ,  G03G5/0614 ,  G03G5/0672

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：US20180046099A1

公开(公告)日：2018-02-15

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: G03G5/05 ,  G03G5/06 ,  G03G5/047 ,  C08G63/00

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).