公开(公告)号：US20190265601A1

公开(公告)日：2019-08-29

申请号：US16287102

申请日：2019-02-27

申请人： CANON KABUSHIKI KAISHA

发明人： Tsutomu Nishida ,  Atsushi Okuda ,  Yuka Ishiduka ,  Nobuhiro Nakamura ,  Hiroyuki Watanabe ,  Hideharu Shimozawa

IPC分类号： G03G5/06 ,  G03G5/05 ,  G03G21/00

摘要： The present invention provides an electrophotographic photosensitive member sequentially including: a support; a photosensitive layer; and a protection layer formed on the support, wherein the protection layer has a triarylamine structure and a specific cyclic structure, and a specific A-value obtained by measurement using total reflection Fourier transform infrared spectroscopy is 0.010 or more and 0.050 or less.

公开(公告)号：US10372047B2

公开(公告)日：2019-08-06

申请号：US15879853

申请日：2018-01-25

申请人： KYOCERA Document Solutions Inc.

发明人： Tomofumi Shimizu ,  Kiichiro Oji

IPC分类号： G03G5/06 ,  G03G5/05 ,  G03G5/09

摘要： 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.

公开(公告)号：US20190219937A1

公开(公告)日：2019-07-18

申请号：US16368121

申请日：2019-03-28

申请人： Mitsubishi Chemical Corporation

发明人： Akiteru FUJII ,  Yuka NAGAO ,  Wataru MIYASHITA

IPC分类号： G03G5/047 ,  G03G5/05 ,  G03G5/06

摘要： The present invention aims to provide an electrophotographic photoreceptor including a charge transport layer and being excellent in electrical properties and adhesiveness while exhibiting sufficient abrasion resistance indispensable for prolonging the life, and an electrophotographic photoreceptor cartridge and an image forming apparatus including the electrophotographic photoreceptor, which is an electrophotographic photoreceptor including a charge transport layer including at least two layers, wherein an elastic deformation ratio of a binder resin contained in a first charge transport layer which is an outermost layer and an elastic deformation ratio of a binder resin contained in a second charge transport layer satisfy a predetermined relationship.

公开(公告)号：US10317810B2

公开(公告)日：2019-06-11

申请号：US15802722

申请日：2017-11-03

申请人： LEXMARK INTERNATIONAL, INC.

发明人： Weimei Luo ,  Mark Thomas Bellino

IPC分类号： G03G5/00 ,  G03G5/05 ,  G03G5/147 ,  G03G5/10 ,  G03G5/06

摘要： An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.

公开(公告)号：US10295918B2

公开(公告)日：2019-05-21

申请号：US15667678

申请日：2017-08-03

申请人： KYOCERA Document Solutions Inc.

发明人： Tomofumi Shimizu ,  Keiji Maruo ,  Jun Azuma

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

摘要： 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.

公开(公告)号：US20190107790A1

公开(公告)日：2019-04-11

申请号：US16210378

申请日：2018-12-05

申请人： Mitsubishi Chemical Corporation

发明人： Hiroe FUCHIGAMI ,  Mitsuo WADA

IPC分类号： G03G5/047 ,  G03G5/06 ,  G03G5/05 ,  G03G5/14 ,  G03G5/10 ,  G03G15/00

摘要： The present invention relates to an electrophotographic photoreceptor which is a positive charging type electrophotographic photoreceptor comprising a conductive support and a photosensitive layer on the conductive support, wherein the photosensitive layer contains at least a charge generating material, a hole transport material, an electron transport material, and a binder resin in the same layer, and a residual potential VL1 at a point at which an exposure amount for forming a latent image is 0.3 μJ/cm2 is equal to or lower than 130 V when an initial surface potential V0 is set to +700 V, exposure with monochromatic light of 780 nm is performed and measurement is performed by a dynamic method.

公开(公告)号：US20190064684A1

公开(公告)日：2019-02-28

申请号：US16080534

申请日：2017-02-10

申请人： KYOCERA Document Solutions Inc.

发明人： Hideki OKADA

IPC分类号： G03G5/06 ,  G03G5/05

CPC分类号： G03G5/0657 ,  G03G5/0564 ,  G03G5/0614 ,  G03G5/0629 ,  G03G5/0696

摘要： An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) contains a charge generating material and a compound represented by general formula (1) shown below. In general formula (1), R1 and R2 each represent, independently of one another: a C1-20 alkyl group optionally having at least one of a C6-14 aryl group optionally having a substituent and a C2-20 alkoxycarbonyl group; a C6-14 aryl group optionally having a C1-20 alkyl group; a C3-10 cycloalkyl group; or a C1-6 alkoxy group.

公开(公告)号：US10209639B2

公开(公告)日：2019-02-19

申请号：US15484715

申请日：2017-04-11

申请人： Tomoharu Asano ,  Tetsuro Suzuki ,  Eiji Kurimoto ,  Daisuke Nii ,  Toshihiro Ishida

发明人： Tomoharu Asano ,  Tetsuro Suzuki ,  Eiji Kurimoto ,  Daisuke Nii ,  Toshihiro Ishida

IPC分类号： G03G5/14 ,  G03G5/06 ,  G03G5/047 ,  G03G15/00 ,  G03G5/05

摘要： A photoconductor including a conductive support, an undercoat layer, a charge-generating layer, and a charge-transporting layer, at least the undercoat layer, the charge-generating layer, and the charge-transporting layer being disposed on the conductive support in an order mentioned, wherein the undercoat layer includes a binder resin and metal oxide particles, and the charge-generating layer includes a binder resin, a titanyl phthalocyanine pigment, and a salicylic acid derivative.

公开(公告)号：US20190033734A1

公开(公告)日：2019-01-31

申请号：US16143526

申请日：2018-09-27

申请人： Mitsubishi Chemical Corporation

发明人： Atsushi YOSHIZAWA

IPC分类号： G03G5/05 ,  C08F290/06 ,  G03G15/00

摘要： The invention relates to an electrophotographic photoreceptor which is excellent in abrasion resistance and electrical properties by using a fluororesin and a polymer containing a structure represented by a specific formula, and has a long life span, an electrophotographic photoreceptor cartridge and an image forming apparatus including the electrophotographic photoreceptor, and a dispersant which is excellent in dispersibility of a fluororesin particle, and the electrical properties, and the compatibility with a binder resin.

公开(公告)号：US10185237B2

公开(公告)日：2019-01-22

申请号：US14992603

申请日：2016-01-11

申请人： Mitsubishi Chemical Corporation

发明人： Akiteru Fujii ,  Rui Zhao ,  Yuka Nagao ,  Atsushi Yoshizawa ,  Yuuta Kumano

IPC分类号： G03G5/047 ,  C08G63/193 ,  G03G5/05 ,  G03G5/06

摘要： An electrophotographic photoreceptor comprises a conductive support and, at least a photosensitive layer on the conductive support, wherein the photosensitive layer includes a polyarylate resin and the polyarylate resin has a repeating structure represented by formula (1), and the amount of bisphenol residues represented by formula (3) after the polyarylate resin is hydrolyzed, is 0.2% to 1%, in terms of intensity ratio, based on the total amount of bisphenol residues represented by formula (2) and formula (3) after the polyarylate resin is hydrolyzed, the bisphenol residues being detected with a gas chromatograph employing a hydrogen flame ionization detector (FID).