公开(公告)号：US10761441B2

公开(公告)日：2020-09-01

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),

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：US09376371B2

公开(公告)日：2016-06-28

申请号：US14288542

申请日：2014-05-28

Applicant: KYOCERA DOCUMENT SOLUTIONS INC.

Inventor： Fumio Sugai ,  Kensuke Kojima ,  Kenji Kitaguchi ,  Hideki Okada

IPC: C07C217/92 ,  G03G5/06 ,  C07C209/10 ,  C07C211/54

CPC classification number: C07C217/92 ,  C07C209/10 ,  C07C211/54 ,  G03G5/0614 ,  G03G5/0618 ,  G03G5/0672

Abstract: A triphenylamine derivative is represented by General Formula (1). In General Formula (1), OR1 represents an alkoxy group having 2 to 8 carbon atoms. R2 to R6 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. Ar1 and Ar2 each independently represent a hydrogen atom, an aryl group having 6 to 20 carbon atoms and optionally substituted with an alkyl group having 1 to 6 carbon atoms, an aryl group having 6 to 20 carbon atoms and optionally substituted with an alkoxy group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, or a 3- to 10-membered heterocyclic group. Note that the case where Ar1 and Ar2 are both a hydrogen atom is excluded.

Abstract translation: 三苯胺衍生物由通式（1）表示。 在通式（1）中，OR 1表示碳原子数2〜8的烷氧基。 R 2〜R 6各自独立地表示氢原子或碳原子数1〜8的烷基。 Ar 1和Ar 2各自独立地表示氢原子，碳原子数6〜20的芳基，可以被碳原子数1〜6的烷基取代的芳基，碳原子数6〜20的芳基， 1至6个碳原子，具有3至10个碳原子的环烷基或3至10元杂环基。 注意，不排除Ar1和Ar2都是氢原子的情况。