公开(公告)号：US20240402625A1

公开(公告)日：2024-12-05

申请号：US18676137

申请日：2024-05-28

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuko IWASHITA ,  Yasuhiro OISHI

IPC: G03G5/147 ,  G03G5/06 ,  G03G5/10 ,  G03G15/16 ,  G03G21/18

Abstract: An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles include metal oxide particles. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid and a second repeating unit derived from a diamine compound. The total percentage content of the first repeating unit and the second repeating unit is at least 80% by mol to all repeating units included in the specific polyamide resin. The photosensitive layer contains a charge generating material, an electron transport material, a binder resin, a hole transport material, and an n-type pigment.

公开(公告)号：US20240353792A1

公开(公告)日：2024-10-24

申请号：US18636961

申请日：2024-04-16

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuko IWASHITA ,  Jun AZUMA ,  Keiji MARUO ,  Kazuaki EZURE ,  Yuichi YOSHIDA ,  Kazutaka SUGIMOTO ,  Yasuhiro OISHI ,  Kazunari HAMASAKI

IPC: G03G21/18 ,  G03G5/14 ,  G03G7/00 ,  G03G15/095

CPC classification number: G03G21/1814 ,  G03G5/142 ,  G03G7/0053 ,  G03G15/095 ,  G03G2215/00957

Abstract: An electrophotographic photosensitive member includes a conductive substrate, an intermediate layer provided on the conductive substrate, and a photosensitive layer provided on the intermediate layer. The intermediate layer contains a specific polyamide resin and specific inorganic particles. The specific inorganic particles each include a metal oxide particle and a surface treatment layer covering at least a part of the surface of the metal oxide particle. The surface treatment layers contain a component derived from an organic siloxane compound and at least one of aluminum oxide and silica. The specific polyamide resin includes a first repeating unit derived from an aliphatic dicarboxylic acid with a carbon number of at least 8 and no greater than 20 and a second repeating unit derived from a diamine compound with a cycloalkane structure.

公开(公告)号：US20200233323A1

公开(公告)日：2020-07-23

申请号：US16740028

申请日：2020-01-10

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuko IWASHITA ,  Kazunari HAMASAKI

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

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 hole transport material includes a compound represented by chemical formula (1-1) or (1-2). The photosensitive layer further contains an n-type pigment. The n-type pigment is preferably an azo pigment or a perylene pigment.

公开(公告)号：US20160223923A1

公开(公告)日：2016-08-04

申请号：US15007332

申请日：2016-01-27

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuko IWASHITA ,  Kazutaka SUGIMOTO ,  Takafumi MATSUMOTO

IPC: G03G15/00

CPC classification number: G03G5/0609 ,  G03G5/0668 ,  G03G5/0677 ,  G03G5/0696

Abstract: An electrophotographic photosensitive member includes a single-layer type photosensitive layer including phthalocyanine or a derivative thereof and an electron transport material. The electron transport material includes at least one first compound represented by formula (1) or (2) shown below and at least one second compound represented by formula (3), (4), or (5) shown below. A total amount of the at least one first compound and the at least one second compound is no less than 60 parts by mass and no greater than 120 parts by mass relative to 100 parts by mass of the binder resin. An amount of the at least one first compound is no less than 35 parts by mass and no greater than 80 parts by mass. An amount of the at least one second compound is no less than 25 parts by mass and no greater than 40 parts by mass.

Abstract translation: 电子照相感光构件包括包含酞菁或其衍生物的单层型感光层和电子传输材料。 电子传输材料包括由下述式（1）或（2）表示的至少一种第一化合物和至少一种由下式（3），（4）或（5）表示的第二化合物。 相对于100质量份粘合剂树脂，至少一种第一化合物和至少一种第二化合物的总量不小于60质量份且不大于120质量份。 所述至少一种第一化合物的量不小于35质量份且不大于80质量份。 所述至少一种第二化合物的量不小于25质量份且不大于40质量份。

公开(公告)号：US20160223921A1

公开(公告)日：2016-08-04

申请号：US15010098

申请日：2016-01-29

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuko IWASHITA ,  Kazutaka SUGIMOTO ,  Takafumi MATSUMOTO

IPC: G03G15/00

CPC classification number: G03G5/047 ,  G03G5/0614 ,  G03G5/0672 ,  G03G5/0696

Abstract: An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer contains a charge generating material and a hole transport material represented by general formula (1) shown below in a single layer. Titanyl phthalocyanine contained as the charge generating material exhibits a main peak at a Bragg angle 2θ±0.2°=27.2° in a CuKα characteristic X-ray diffraction spectrum and satisfies either (B) or (C), shown below, in a differential scanning calorimetry spectrum. (B) A peak is not present in a range from 50° C. to 400° C., other than a peak resulting from vaporization of adsorbed water. (C) A peak is not present in a range from 50° C. to 270° C., other than a peak resulting from vaporization of adsorbed water, and a peak is present in a range from 270° C. to 400° C.

Abstract translation: 电子照相感光构件包括感光层。 感光层在单层中含有下述通式（1）所示的电荷产生材料和空穴传输材料。 在CuKα特征X射线衍射光谱中，作为电荷产生材料含有的酞菁酞菁在布拉格角为2θ±0.2°= 27.2°时呈现主峰，并且在差示扫描中满足下述（B）或（C） 量热谱 （B）除了由吸附水蒸发得到的峰值以外，峰值不存在于50℃〜400℃的范围内。 （C）除了吸附水的蒸发产生的峰以外，峰不在50℃〜270℃的范围内，峰值存在于270〜400℃的范围内 。