公开(公告)号：US20240192613A1

公开(公告)日：2024-06-13

申请号：US18518395

申请日：2023-11-22

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Makoto SHISHIDO

IPC: G03G5/05 ,  G03G5/06 ,  G03G15/02 ,  G03G15/04 ,  G03G21/00 ,  G03G21/12

CPC classification number: G03G5/0528 ,  G03G5/0609 ,  G03G5/06144 ,  G03G5/06145 ,  G03G5/0631 ,  G03G5/0637 ,  G03G15/0216 ,  G03G15/04036 ,  G03G21/0047 ,  G03G21/12

Abstract: A photosensitive layer of an electrophotographic photosensitive member is a single layer and contains a charge generating material, a binder resin, a first electron transport material, a second electron transport material, and a hole transport material. The binder resin includes a polyarylate resin. The polyarylate resin includes repeating units represented by formulas (1), (2), (3), and (4).




The repeating unit (3) has a percentage content of greater than 0% and less than 50% to a total number of repeats of the repeating units (1) and (3). The repeating unit (4) has a percentage content of at least 35% and less than 70% to a total number of repeats of the repeating units (2) and (4).

公开(公告)号：US20220413404A1

公开(公告)日：2022-12-29

申请号：US17752454

申请日：2022-05-24

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Makoto SHISHIDO

IPC: G03G5/05 ,  C07C211/54 ,  C07F15/00 ,  C07D259/00 ,  C07D231/22 ,  C07C50/10 ,  C07C50/12 ,  C07D471/04 ,  C07C245/06 ,  G03G5/06

Abstract: A photosensitive layer of an electrophotographic photosensitive member is a single layer and contains a charge generating material, a hole transport material, a first electron transport material, a second electron transport material, and a binder resin. The binder resin includes a polyarylate resin. The polyarylate resin includes repeating units (1), (2), (3), and (4). A percentage of the number of repeats of the repeating unit (3) relative to the total of the number of repeats of the repeating units (1) and the number of repeats of the repeating unit (3) is greater than 0% and less than 20%. The first electron transport material includes a compound represented by formula (A15) or (A16). The second electron transport material includes a compound represented by formula (B10), (B11), (B12), (B13), or (B14)

公开(公告)号：US20200231535A1

公开(公告)日：2020-07-23

申请号：US16632197

申请日：2018-07-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun AZUMA ,  Kensuke KOJIMA ,  Tomofumi SHIMIZU ,  Hideki OKADA

IPC: C07C211/54 ,  G03G5/047 ,  G03G5/06 ,  G03G5/05 ,  C07C209/06

Abstract: A compound is represented by general formula (1). In general formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R1 and the number of carbon atoms of the chemical group represented by R2 is 2. R3 and R4 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R3 and the number of carbon atoms of the chemical group represented by R1 is 2. A photosensitive layer of an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound represented by general formula (1)

公开(公告)号：US20190025721A1

公开(公告)日：2019-01-24

申请号：US16035881

申请日：2018-07-16

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Kiichiro OJI

IPC: G03G5/06 ,  G03G5/05

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer and contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin has a viscosity average molecular weight of at least 25,000 and no greater than 50,000. A strain at break of the photosensitive layer is at least 4.9% and no greater than 13.0%. A scratch resistant depth of the photosensitive layer is no greater than 0.50 μm.

公开(公告)号：US20180046098A1

公开(公告)日：2018-02-15

申请号：US15667690

申请日：2017-08-03

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Keiji MARUO

IPC: G03G15/00

CPC classification number: G03G5/0596 ,  G03G5/047 ,  G03G5/056 ,  G03G5/0609 ,  G03G5/0614

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The photosensitive layer has a scratch resistance depth of no greater than 0.50 μm.

公开(公告)号：US20170068177A1

公开(公告)日：2017-03-09

申请号：US15248540

申请日：2016-08-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Junichiro OTSUBO ,  Yasuhiro OISHI

IPC: G03G15/00

CPC classification number: G03G5/0607 ,  G03G5/04 ,  G03G5/0609 ,  G03G5/0631 ,  G03G5/0696 ,  G03G5/102 ,  G03G5/144 ,  G03G15/75 ,  G03G2215/0129 ,  G03G2215/0148

Abstract: A single-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The conductive substrate contains aluminum or an aluminum alloy. A surface of the conductive substrate has an aluminum oxide film or an aluminum alloy oxide film. The photosensitive layer is disposed directly on the conductive substrate. The photosensitive layer contains an electron transport material. The electron transport material has a reduction potential of at least −0.88 V and no greater than −0.66 V versus a reference electrode (Ag/Ag+). The single-layer electrophotographic photosensitive member has a leakage onset voltage of at least 5.0 kV in a high temperature and humidity environment at a temperature of 30° C. and a relative humidity of 80%. The leakage onset voltage is a voltage applied to the single-layer electrophotographic photosensitive member at which current leakage starts.

Abstract translation: 单层电子照相感光构件包括导电基底和感光层。 导电性基材含有铝或铝合金。 导电性基板的表面具有氧化铝膜或铝合金氧化膜。 感光层直接设置在导电性基板上。 感光层含有电子传输材料。 相对于参考电极（Ag / Ag +），电子传输材料具有至少-0.88V且不大于-0.66V的还原电位。 单层电子照相感光构件在温度30℃，相对湿度80％的高温高湿环境下的起爆电压为5.0kV以上。 泄漏开始电压是施加到电流泄漏开始的单层电子照相感光构件的电压。

公开(公告)号：US20220397835A1

公开(公告)日：2022-12-15

申请号：US17664997

申请日：2022-05-25

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Makoto Shishido

IPC: G03G5/05 ,  G03G5/06 ,  G03G21/18

Abstract: A single-layer photosensitive layer included in an electrophotographic photosensitive member contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin includes a polyarylate resin. The polyarylate resin includes repeating units represented by formulas (1), (2), (3), and (4). The percentage of the number of repeats of the repeating unit represented by formula (3) relative to a total of the number of repeats of the repeating unit represented by formula (1) and the number of repeats of the repeating unit represented by formula (3) is greater than 0% and less than 20%.

公开(公告)号：US20220128913A1

公开(公告)日：2022-04-28

申请号：US17505721

申请日：2021-10-20

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Makoto SHISHIDO ,  Kazuaki EZURE ,  Kiichiro OJI ,  Katsuya TAKANO

IPC: G03G5/06 ,  G03G5/07

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single layer and contains a charge generating material, a hole transport material, an electron transport material, and a polyarylate resin. The polyarylate resin includes repeating units represented by formulas (1), (2), and (3). A ratio n1/n2 of the number n1 of repeats of the repeating unit represented by formula (1) to the number n2 of repeats of the repeating unit represented by formula (2) is at least 1.0.

公开(公告)号：US20200233324A1

公开(公告)日：2020-07-23

申请号：US16740196

申请日：2020-01-10

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tomofumi SHIMIZU ,  Kazuaki EZURE ,  Hayase YAMAMOTO ,  Jun AZUMA

IPC: G03G5/06 ,  G03G5/05 ,  G03G21/18 ,  G03G15/00

Abstract: A photosensitive layer included in an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound (1). The binder resin includes a polyarylate resin having at least one repeating unit (10) and at least one repeating unit (11). Alternatively, the binder resin includes a polycarbonate resin having a repeating unit (20) and a repeating unit (21). The general formulas (1), (10), (11), (20), and (21) are as follows

公开(公告)号：US20190354029A1

公开(公告)日：2019-11-21

申请号：US16411173

申请日：2019-05-14

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun AZUMA ,  Tomofumi SHIMIZU ,  Kenji KITAGUCHI ,  Kiichiro OJI

IPC: G03G5/05 ,  G03G5/06

Abstract: A method for producing an electrophotographic photosensitive member includes an electrically conductive substrate and a photosensitive layer. The method includes applying an application liquid for photosensitive layer formation containing a solvent, a binder resin, and a hole transport material directly or indirectly onto the electrically conductive substrate, and removing a portion of the solvent, to form the photosensitive layer. The solvent contains a first solvent that is an alcohol having a carbon number of at least 1 and no greater than 3, and a second solvent other than the first solvent. The binder resin includes a polyarylate resin that is a polymerization product of monomers including a first monomer represented by general formula (1) and a second monomer represented by general formula (2),