公开(公告)号：US10921723B2

公开(公告)日：2021-02-16

申请号：US16597152

申请日：2019-10-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kumiko Takizawa ,  Tsuyoshi Shimada ,  Takanori Ueno ,  Ikuyo Kuroiwa ,  Haruhiko Mitsuda ,  Kan Tanabe ,  Tatsuya Ikezue

IPC: G03G5/00 ,  G03G5/14 ,  G03G5/06 ,  G03G5/05 ,  G03G15/00 ,  G03G21/18

Abstract: Provided is an electrophotographic photosensitive member that can achieve both of abrasion resistance and the suppression of a ghost. The electrophotographic photosensitive member includes: a support; an undercoat layer; a charge-generating layer; and a charge-transporting layer, the undercoat layer, the charge-generating layer, and the charge-transporting layer being arranged in the stated order on the support, wherein the charge-transporting layer includes a charge-transporting substance, and a polymer containing a structure represented by the following general formula (1) and a structure represented by the following general formula (2), wherein the charge-generating layer includes a phthalocyanine crystal and a binder resin, and wherein the undercoat layer includes strontium titanate particles and a binder resin.

公开(公告)号：US10241429B2

公开(公告)日：2019-03-26

申请号：US15960916

申请日：2018-04-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsuyoshi Shimada ,  Kumiko Takizawa ,  Eileen Takeuchi ,  Ikuyo Kuroiwa ,  Wataru Kitamura ,  Kan Tanabe ,  Haruhiko Mitsuda

IPC: G03G5/14 ,  G03G7/00 ,  G03G15/02 ,  G03F7/09 ,  B82Y30/00

Abstract: There is provided an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus that are excellent in charging properties and can suppress residual potential in the case where a strontium titanate particle is used as a metal oxide particle in an undercoat layer of the electrophotographic photosensitive member. An electrophotographic photosensitive member in which an undercoat layer contains a strontium titanate particle having a maximum peak at a position of 2θ=32.20±0.20 (θ represents a Bragg angle) in a CuKα characteristic X-ray diffraction pattern, the maximum peak having a half-value width of 0.10 deg or more and 0.50 deg or less, and a process cartridge and an electrophotographic apparatus each provided with the electrophotographic photosensitive member.

公开(公告)号：US09804512B2

公开(公告)日：2017-10-31

申请号：US14775333

申请日：2014-03-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Ryoichi Tokimitsu ,  Yuka Ishiduka ,  Wataru Kitamura ,  Mai Murakami ,  Kan Tanabe

IPC: G03G5/00 ,  G03G5/14 ,  G03G5/05

CPC classification number: G03G5/144 ,  G03G5/0517

Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer which contains a metal oxide particle and is formed on the support, a charge generating layer formed on the undercoat layer, and a charge transporting layer formed on the charge generating layer. Either or both of the undercoat layer and the charge generating layer contain a compound represented by formula (1).

公开(公告)号：US20180314173A1

公开(公告)日：2018-11-01

申请号：US15960916

申请日：2018-04-24

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsuyoshi Shimada ,  Kumiko Takizawa ,  Eileen Takeuchi ,  Ikuyo Kuroiwa ,  Wataru Kitamura ,  Kan Tanabe ,  Haruhiko Mitsuda

IPC: G03G15/00 ,  G03G7/00 ,  G03F7/09

CPC classification number: G03G7/0086 ,  B82Y30/00 ,  G03F7/092 ,  G03G5/144 ,  G03G15/0216 ,  G03G15/75

Abstract: There is provided an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus that are excellent in charging properties and can suppress residual potential in the case where a strontium titanate particle is used as a metal oxide particle in an undercoat layer of the electrophotographic photosensitive member. An electrophotographic photosensitive member in which an undercoat layer contains a strontium titanate particle having a maximum peak at a position of 2θ=32.20±0.20 (θ represents a Bragg angle) in a CuKα characteristic X-ray diffraction pattern, the maximum peak having a half-value width of 0.10 deg or more and 0.50 deg or less, and a process cartridge and an electrophotographic apparatus each provided with the electrophotographic photosensitive member.

公开(公告)号：US09557664B2

公开(公告)日：2017-01-31

申请号：US14784533

申请日：2014-03-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yuka Ishiduka ,  Ryoichi Tokimitsu ,  Wataru Kitamura ,  Mai Murakami ,  Kan Tanabe

IPC: G03G5/00 ,  G03G5/14 ,  G03G5/04

CPC classification number: G03G5/144 ,  G03G5/04 ,  G03G5/142

Abstract: The present invention provides an electrophotographic photosensitive member which includes an undercoat layer, and the undercoat layer contains metal oxide particles and a compound represented by the formula (1).

Abstract translation: 本发明提供一种电子照相感光构件，其包括底涂层，底涂层含有金属氧化物颗粒和由式（1）表示的化合物。

公开(公告)号：US09557660B2

公开(公告)日：2017-01-31

申请号：US15150710

申请日：2016-05-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Koji Takahashi ,  Naoaki Ichihashi ,  Kan Tanabe

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

CPC classification number: G03G5/0614 ,  G03G5/043 ,  G03G5/0514 ,  G03G5/0517 ,  G03G5/0525 ,  G03G5/056 ,  G03G5/0564 ,  G03G5/0696

Abstract: The subject invention relates to a charge transport layer forming coating liquid containing a charge transport material, at least one selected from the group consisting of polycarbonate resins and polyester resins, at least one of xylene and toluene, and cyclopentanone. The proportion of cyclopentanone in the charge transport layer forming coating liquid is in the range of 50% by mass to 85% by mass relative to the total mass of at least one of xylene and toluene and cyclopentanone.

Abstract translation: 本发明涉及含有电荷输送材料的电荷输送层形成涂布液，选自聚碳酸酯树脂和聚酯树脂中的至少一种，二甲苯和甲苯中的至少一种和环戊酮。 电荷传输层形成涂布液中环戊酮的比例相对于二甲苯和甲苯和环戊酮中的至少一种的总质量为50质量％〜85质量％。

公开(公告)号：US20160131984A1

公开(公告)日：2016-05-12

申请号：US14935273

申请日：2015-11-06

Applicant: CANON KABUSHIKI KAISHA

Inventor： Koji Takahashi ,  Naoaki Ichihashi ,  Kan Tanabe

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

CPC classification number: G03G5/0614 ,  G03G5/043 ,  G03G5/0514 ,  G03G5/0517 ,  G03G5/0525 ,  G03G5/056 ,  G03G5/0564 ,  G03G5/0696

Abstract: An electrophotographic photosensitive member includes a charge transport layer containing (α) a charge transporting compound, (β) a binding resin in a proportion in the range of 50% by mass to 200% by mass relative to the mass of the charge transporting compound, (γ) a compound being at least one of xylene and toluene with a content in the range of 0.01% by mass to 2.00% by mass relative to the total mass of the charge transport layer, and (δ) a cycloalkanone with a content in the range of 0.01% by mass to 1.20% by mass relative to the total mass of the charge transport layer.

Abstract translation: 电子照相感光构件包括电荷输送层，该电荷输送层含有（α）电荷输送性化合物，（bb）粘结树脂的比例相对于电荷输送化合物的质量为50质量％〜200质量％ ，（γ）相对于电荷输送层的总质量为0.01质量％〜2.00质量％的二甲苯和甲苯中的至少一种的化合物，（δ）含有含量的环烷酮 相对于电荷输送层的总质量为0.01质量％〜1.20质量％。

公开(公告)号：US20170285499A1

公开(公告)日：2017-10-05

申请号：US15469935

申请日：2017-03-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tsuyoshi Shimada ,  Ryoichi Tokimitsu ,  Mai Murakami ,  Kan Tanabe ,  Wataru Kitamura ,  Haruhiko Mitsuda

IPC: G03G15/00

CPC classification number: G03G5/144 ,  G03G5/0517 ,  G03G5/14 ,  G03G5/142 ,  G03G15/0216 ,  G03G2215/00957 ,  G03G2215/025

Abstract: The present invention provides an electrophotographic apparatus in which the deterioration of electrical properties in repetitive use is suppressed even in the case where an electrophotographic photosensitive member absorbs moisture under a high-temperature and high-humidity environment. An undercoat layer of the electrophotographic photosensitive member provided in the electrophotographic apparatus contains (α) a metal oxide particle, (β) a particular benzophenone compound and (γ) a compound represented by the following formula (2). wherein R11 to R15 each independently represent a hydrogen atom, a hydroxy group, a halogen atom, an alkyl group, an alkoxy group or an amino group and A1 represents an alkenyl group having 2 or more and 4 or less carbon atoms.

公开(公告)号：US20160252831A1

公开(公告)日：2016-09-01

申请号：US15150710

申请日：2016-05-10

Applicant: CANON KABUSHIKI KAISHA

Inventor： Koji Takahashi ,  Naoaki Ichihashi ,  Kan Tanabe

IPC: G03G5/06 ,  G03G5/05

CPC classification number: G03G5/0614 ,  G03G5/043 ,  G03G5/0514 ,  G03G5/0517 ,  G03G5/0525 ,  G03G5/056 ,  G03G5/0564 ,  G03G5/0696

Abstract: An electrophotographic photosensitive member includes a charge transport layer containing (α) a charge transporting compound, (β) a binding resin in a proportion in the range of 50% by mass to 200% by mass relative to the mass of the charge transporting compound, (γ) a compound being at least one of xylene and toluene with a content in the range of 0.01% by mass to 2.00% by mass relative to the total mass of the charge transport layer, and (δ) a cycloalkanone with a content in the range of 0.01% by mass to 1.20% by mass relative to the total mass of the charge transport layer. Also, a charge transport layer forming coating liquid contains (α′) a charge transport material, (β′) at least one selected from the group consisting of polycarbonate resins and polyester resins, (γ′) at least one of xylene and toluene, and (δ′) cyclopentanone. The proportion of (δ′) is in the range of 50% by mass to 85% by mass relative to the total mass of (γ′) and (δ′).

Abstract translation: 电子照相感光构件包括电荷输送层，该电荷输送层含有（α）电荷输送性化合物，（β）相对于电荷输送性化合物的质量为50质量％〜200质量％的粘合树脂， （γ）相对于电荷输送层的总质量为0.01质量％〜2.00质量％的二甲苯和甲苯中的至少一种的化合物，（δ）含有 相对于电荷输送层的总质量为0.01质量％〜1.20质量％的范围。 此外，电荷输送层形成用涂布液含有（α'）电荷输送材料，（β'）选自聚碳酸酯树脂和聚酯树脂中的至少一种（γ'）（γ'）二甲苯和甲苯中的至少一种， 和（δ'）环戊酮。 （δ'）的比例相对于（γ'）和（δ'）的总质量在50质量％〜85质量％的范围内。

公开(公告)号：US10935898B2

公开(公告)日：2021-03-02

申请号：US16655494

申请日：2019-10-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Ikuyo Kuroiwa ,  Kumiko Takizawa ,  Tsuyoshi Shimada ,  Kan Tanabe ,  Haruhiko Mitsuda ,  Takanori Ueno ,  Tatsuya Ikezue ,  Wataru Kitamura

IPC: G03G5/05 ,  G03G5/14 ,  G03G5/147

Abstract: An electrophotographic photosensitive member includes a support, an undercoat layer, a photosensitive layer, and a surface layer, the undercoat layer containing a binder resin and strontium titanate particles, the surface layer being a cured film of a composition containing at least one compound selected from a guanamine compound and a melamine compound, and a charge transport material having at least one substituent selected from —OH, —OCH3, —NH2, —SH, and —COOH.