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1.发明授权公开(公告)号：US10996575B2
公开(公告)日：2021-05-04
申请号：US16740196
申请日：2020-01-10
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Kazuaki Ezure , Hayase Yamamoto , Jun Azuma
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
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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).
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3.发明授权公开(公告)号：US10372047B2
公开(公告)日：2019-08-06
申请号：US15879853
申请日：2018-01-25
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Kiichiro Oji
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, a binder resin, and an additive. The additive contains a carboxylic acid anhydride. A reduction potential of the carboxylic acid anhydride is at least −1.40 V versus a reference electrode (Ag/Ag+). The carboxylic acid anhydride is contained in an amount of at least 0.02 parts by mass and no greater than 10.00 parts by mass relative to 100 parts by mass of the binder resin.
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4.发明授权公开(公告)号：US10295918B2
公开(公告)日：2019-05-21
申请号：US15667678
申请日：2017-08-03
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Keiji Maruo , Jun Azuma
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin contains a polyarylate resin (1). The polyarylate resin is represented by general formula (1). The photosensitive layer has a scratch resistance depth of no greater than 0.50 μm. The photosensitive layer has a Vickers hardness of at least 17.0 HV.
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5.发明授权公开(公告)号：US11243481B2
公开(公告)日：2022-02-08
申请号：US16866116
申请日：2020-05-04
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kazuaki Ezure , Tomofumi Shimizu , Hayase Yamamoto
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a binder resin, a hole transport material, and an electron transport material. The binder resin includes a polyester resin. The polyester resin includes a first repeating unit represented by general formula (1) shown below and a second repeating unit represented by general formula (2) shown below. A content percentage of the polyester resin in the photosensitive layer is at least 0.3% by mass and no greater than 7.0% by mass.
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Patent Agency Ranking
6.发明授权公开(公告)号：US10656543B2
公开(公告)日：2020-05-19
申请号：US16302716
申请日：2017-04-27
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Hideki Okada
Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer (3c) containing a charge generating material and an electron transport material. The electron transport material includes a compound represented by general formula (1) shown below. An amount of charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer (3) is at least +7.0 μC/g. In general formula (1), R1 and R2 each represent, independently of each other, a halogen atom, for example. Further, m, n, and Y are as described in the description.
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公开(公告)号：US10001716B2
公开(公告)日：2018-06-19
申请号：US15077144
申请日：2016-03-22
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Makoto Shishido
IPC: G03G5/06
CPC classification number: G03G5/0614 , G03G5/0609 , G03G5/0612 , G03G5/0616 , G03G5/0631 , G03G5/0651
Abstract: A positively chargeable single-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and an electron accepting compound. The hole transport material includes a benzidine derivative. The electron transport material includes at least one compound selected from the group consisting of compounds represented by general formulae (1), (2), (3), and (4) shown below. The electron accepting compound includes at least one compound selected from the group consisting of compounds represented by general formulae (5) and (6) shown below.
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8.发明授权公开(公告)号：US08980507B2
公开(公告)日：2015-03-17
申请号：US14091086
申请日：2013-11-26
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Eiichi Miyamoto , Hiroki Tsurumi
CPC classification number: G03G5/047 , G03G5/0609 , G03G5/0614 , G03G5/0672 , G03G5/0674 , G03G5/0679
Abstract: A positively chargeable monolayer electrophotographic photosensitive member includes a photosensitive layer provided on a conductive substrate and having a monolayer structure containing at least a charge generating material, a hole transport material, an electron transport material, and a binder resin. The photosensitive layer contains a hole transport material containing a triarylamine derivative represented by a formula (1) below and an electron transport material containing a compound selected from the group consisting of quinone compounds having a predetermined structure.
Abstract translation: 可带正电的单层电子照相感光构件包括设置在导电基底上并具有至少含有电荷产生材料，空穴传输材料，电子传输材料和粘合剂树脂的单层结构的感光层。 感光层含有含有下述通式（1）表示的三芳基胺衍生物的空穴传输材料和含有选自具有预定结构的醌化合物的化合物的电子传输材料。
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9.发明授权公开(公告)号：US10732526B2
公开(公告)日：2020-08-04
申请号：US16471154
申请日：2017-11-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu , Keiji Maruo , Jun Azuma
IPC: G03G5/05 , C07D231/18 , C07D471/04 , C08L67/03 , C09B47/30 , G03G5/06
Abstract: An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer (3c) and contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin includes a polyarylate resin represented by general formula (1). In general formula (1), Q1, Q2, Q3, and Q4 each represent a methyl group or a hydrogen atom. r, s, t, and u each represent a number greater than or equal to 15 and less than or equal to 35. X and Y each represent a divalent group represented by chemical formula (2A), chemical formula (2B), chemical formula (2C), or chemical formula (2D), and X and Y are different from each other
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10.发明授权公开(公告)号：US10509337B2
公开(公告)日：2019-12-17
申请号：US16000674
申请日：2018-06-05
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tomofumi Shimizu
IPC: G03G5/06
Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, a polycarbonate resin, and a hole transport material. The electron transport material includes a compound having a halogen atom and represented by general formula (1), (2), (3), (4), or (5). The hole transport material includes a compound represented by general formula (20), (21), (22), (23), (24), (25), (26), or (27). A charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer is at least +6.5 μC/g. A Vickers hardness of the photosensitive layer at 45° C. is at least 17.0 HV.
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