公开(公告)号：US09575423B2

公开(公告)日：2017-02-21

申请号：US14641193

申请日：2015-03-06

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Kensuke Okawa ,  Akihiko Ogata ,  Takahiro Oki

IPC: G03G5/047 ,  G03G5/06 ,  G03G5/05 ,  G03G5/04 ,  G03G5/043

CPC classification number: G03G5/047 ,  G03G5/04 ,  G03G5/043 ,  G03G5/0507 ,  G03G5/0564 ,  G03G5/0605 ,  G03G5/0609 ,  G03G5/0612 ,  G03G5/0614 ,  G03G5/0668 ,  G03G5/0672 ,  G03G5/0696

Abstract: An electrophotographic photosensitive member has a photosensitive layer. The photosensitive layer is a multi-layer photosensitive layer having a charge transport layer being an outermost layer or a single-layer photosensitive layer. The amount of silica particles contained in the photosensitive layer is at least 0.5 parts by mass and no greater than 15 parts by mass relative to 100 parts by mass of a binder resin contained in the photosensitive layer.

Abstract translation: 电子照相感光构件具有感光层。 感光层是具有作为最外层或单层感光层的电荷输送层的多层感光层。 包含在感光层中的二氧化硅颗粒的量相对于感光层中包含的粘合剂树脂100质量份为至少0.5质量份且不大于15质量份。

公开(公告)号：US09448496B2

公开(公告)日：2016-09-20

申请号：US14719911

申请日：2015-05-22

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Keiji Maruo ,  Kensuke Okawa ,  Akihiko Ogata

IPC: G03G5/047 ,  G03G5/06

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

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer located on the charge generating layer. The charge transport layer contains a pigment that is absorptive with respect to a wavelength of exposed light. The pigment is a metal phthalocyanine pigment represented by General Formula (I) or a metal-free phthalocyanine pigment represented by General Formula (II), where X represents a sulfur atom or an oxygen atom. R1 represents an aryl group or an alkyl group. R2-R4 each represent a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, a phenoxy group, an alkylthio group, a phenylthio group, or a dialkylamino group. M represents a metal atom. Y represents non-substitution or an alkyl group, an alkoxy group, an aryloxy group, a halogen atom, an oxygen atom, or a hydroxyl group.

公开(公告)号：US09436104B2

公开(公告)日：2016-09-06

申请号：US14288614

申请日：2014-05-28

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Jun Azuma ,  Keiji Maruo ,  Kensuke Okawa ,  Akihiko Ogata

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

CPC classification number: G03G5/047 ,  G03G5/0564 ,  G03G5/0614 ,  G03G5/0672

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 hole transport material contains an amine stilbene derivative represented by a general formula (1), and the binder resin contains a polycarbonate resin represented by a general formula (2).

公开(公告)号：US10379451B2

公开(公告)日：2019-08-13

申请号：US15904527

申请日：2018-02-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Kensuke Okawa ,  Akihiko Ogata ,  Kenji Kitaguchi ,  Tomofumi Shimizu

IPC: G03G5/05 ,  G03G5/047 ,  G03G5/06 ,  C08G63/672 ,  C08G63/91 ,  C08G63/682

Abstract: A polyarylate resin includes at least one type of repeating unit represented by a general formula (1), at least one type of repeating unit represented by a general formula (2), and a terminal group represented by a general formula (3). R1, R2, R3, and R4 each represent, independently of one another, a hydrogen atom or a methyl group. R5 and R6 each represent, independently of each other, a hydrogen atom or a C1-4 alkyl group. R5 and R6 may bond together to represent a C5-7 cycloalkylidene group. X1 represents a divalent group represented by a chemical formula (2A), (2B), (2C), or (2D) with the proviso that when only one type of repeating unit represented by the general formula (2) is included, X1 does not represent a divalent group represented by the chemical formula (2D). Rf represents a chain aliphatic group having at least one fluoro group.

公开(公告)号：US10273331B2

公开(公告)日：2019-04-30

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: G03G5/05 ,  G03G5/06 ,  C08G63/19 ,  C08G63/181 ,  C08L67/02

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：US10031431B2

公开(公告)日：2018-07-24

申请号：US15492914

申请日：2017-04-20

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Takahiro Oki ,  Kensuke Okawa ,  Akihiko Ogata

IPC: G03G5/05 ,  G03G5/047 ,  G03G5/06 ,  G03G5/10 ,  G03G5/14

Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer contains at least a charge generating material, a charge transport material, and a binder resin. The binder resin includes a polyarylate resin. The polyarylate resin is represented by general formula (1) shown below. In general formula (1), X represents a divalent group represented by chemical formula (1-1), (1-2), (1-3), or (1-4) shown below.

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).

公开(公告)号：US09964869B2

公开(公告)日：2018-05-08

申请号：US15345726

申请日：2016-11-08

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kensuke Okawa ,  Hideki Okada ,  Jun Azuma ,  Fumio Sugai ,  Kensuke Kojima

IPC: G03G5/047 ,  G03G5/06 ,  C07C211/54 ,  C07C217/92 ,  G03G5/05

CPC classification number: G03G5/0612 ,  C07C211/54 ,  C07C217/92 ,  G03G5/0525 ,  G03G5/0567 ,  G03G5/0609 ,  G03G5/0614 ,  G03G5/0618 ,  G03G5/0672 ,  G03G5/0696

Abstract: A triarylamine derivative represented by general formula (1) below. In the general formula (1), R1, R2, R4, R5, R6, R7, R8, and R9 each represent, independently from one another, a hydrogen atom, an optionally substitute alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 14, R3 represents an alkyl group having a carbon number of at least 1 and no greater than 4, X represents an alkylene group having a carbon number of at least 1 and no greater than 6 or an oxygen atom, and n represents an integer of 1 to 3.

公开(公告)号：US09939744B2

公开(公告)日：2018-04-10

申请号：US15254012

申请日：2016-09-01

Applicant: KYOCERA Document Solutions Inc.

Inventor： Jun Azuma ,  Kensuke Okawa ,  Junichiro Otsubo ,  Akihiko Ogata

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

CPC classification number: G03G5/0546 ,  G03G5/047 ,  G03G5/0507 ,  G03G5/0614 ,  G03G5/0672

Abstract: A multi-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer. The charge generating layer contains a charge generating material. The charge transport layer contains a charge transport material, a binder resin, and silica particles. The charge transport layer is a monolayer. The charge transport layer is disposed as an outermost surface layer of the multi-layer electrophotographic photosensitive member. The silica particles have a content of at least 0.5 parts by mass and no greater than 15 parts by mass relative to 100 parts by mass of the binder resin. The binder resin includes a polyarylate resin. The polyarylate resin has a repeating unit represented by general formula (I) shown below. In general formula (I), R1-R3 and Y are defined as those described in the specification.

公开(公告)号：US09933712B2

公开(公告)日：2018-04-03

申请号：US15247373

申请日：2016-08-25

Applicant: KYOCERA Document Solutions Inc.

Inventor： Akihiko Ogata ,  Hideki Okada ,  Jun Azuma ,  Kensuke Okawa

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

CPC classification number: G03G5/0614 ,  G03G5/047 ,  G03G5/0525 ,  G03G5/0564 ,  G03G5/0609 ,  G03G5/0672 ,  G03G5/0696

Abstract: A multi-layer electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer includes a charge generating layer and a charge transport layer. The charge generating layer contains a charge generating material. The charge transport layer contains a hole transport material and a binder resin. The charge generating material contains a titanyl phthalocyanine that exhibits a main peak at a Bragg angle (2θ±0.2°) of 27.2° in a CuKα characteristic X-ray diffraction spectrum. The hole transport material contains a triarylamine derivative represented by generic formula (1). The hole transport material has a mass ratio of at least 0.30 and no greater than 0.55 relative to the binder resin in the charge transport layer. In general formula (1), R1, R2, l, and m are the same as those defined in the specification.