公开(公告)号：US08323861B2

公开(公告)日：2012-12-04

申请号：US12301109

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

IPC: G03G15/04 ,  G03G5/14

CPC classification number: G03G5/0507 ,  G03G5/043 ,  G03G5/047 ,  G03G5/0514 ,  G03G5/0525 ,  G03G5/0614 ,  G03G5/0668 ,  G03G5/0672 ,  G03G5/0696 ,  G03G5/104 ,  G03G5/142 ,  G03G5/144

Abstract: An electrophotographic photoreceptor having high sensitivity and low residual potential is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin on an electroconductive substrate, and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3; and the photosensitive layer contains crystalline phthalocyanine showing at least one distinct main diffraction peak at a Bragg angle (2θ±0.2°) of 27.0° to 29.0° in an X-ray diffraction spectrum.

Abstract translation: 提供具有高灵敏度和低残留电位的电子照相感光体。 电子照相感光体包括在导电性基体上含有金属氧化物粒子和粘合剂树脂的底涂层和设置在底涂层上的感光层，其中金属氧化物粒子的体积平均粒径为0.1μm以下，90％ 通过动态光散射法在分散在甲醇和1-丙醇的溶剂混合物中的底涂层的液体中以重量比7:3测量的累积粒径为0.3μm或更小; 并且感光层含有结晶酞菁，其在X射线衍射光谱中显示在布拉格角（2θ=±0.2°）为27.0°至29.0°的至少一个不同的主要衍射峰。

公开(公告)号：US20100158561A1

公开(公告)日：2010-06-24

申请号：US12300943

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami ,  Susumu Taguchi ,  Shunichiro Kurihara

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami ,  Susumu Taguchi ,  Shunichiro Kurihara

IPC: G03G21/16 ,  G03G5/14 ,  G03G15/00

CPC classification number: G03G15/75 ,  G03G5/10 ,  G03G5/144

Abstract: An electrophotographic photoreceptor having high performance that hardly generates image defects such as black spots, color spots, and interference fringes is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin on an electroconductive substrate having a maximum height surface roughness Rz in the range of 0.8≦Rz≦2 μm, and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid containing the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3.

Abstract translation: 提供了几乎不产生图像缺陷如黑点，色斑和干涉条纹的高性能的电子照相感光体。 电子照相感光体包括在导电性基体上含有金属氧化物粒子和粘合剂树脂的底涂层，其最大高度表面粗糙度Rz在0.8＆lt; 1lE; Rz＆amp; NlE;2μm的范围内，以及设置在底涂层上的感光层，其中 金属氧化物粒子的体积平均粒径为0.1μm以下，90％的累积粒径为0.3μm以下，其通过动态光散射法在含有分散在甲醇溶剂混合物中的底涂层的液体中测定 和1-丙醇，重量比为7:3。

公开(公告)号：US20090136861A1

公开(公告)日：2009-05-28

申请号：US12301109

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

IPC: G03C5/00 ,  G03G15/00

CPC classification number: G03G5/0507 ,  G03G5/043 ,  G03G5/047 ,  G03G5/0514 ,  G03G5/0525 ,  G03G5/0614 ,  G03G5/0668 ,  G03G5/0672 ,  G03G5/0696 ,  G03G5/104 ,  G03G5/142 ,  G03G5/144

Abstract: An electrophotographic photoreceptor having high sensitivity and low residual potential is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin on an electroconductive substrate, and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3; and the photosensitive layer contains crystalline phthalocyanine showing at least one distinct main diffraction peak at a Bragg angle (2θ±0.2°) of 27.0° to 29.0° in an X-ray diffraction spectrum.

Abstract translation: 提供具有高灵敏度和低残留电位的电子照相感光体。 电子照相感光体包括在导电性基体上含有金属氧化物粒子和粘合剂树脂的底涂层和设置在底涂层上的感光层，其中金属氧化物粒子的体积平均粒径为0.1μm以下，90％ 通过动态光散射法在分散在甲醇和1-丙醇的溶剂混合物中的底涂层的液体中以重量比7:3测量的累积粒径为0.3μm或更小; 并且在X射线衍射光谱中，感光层含有在布拉格角（2θ±0.2°）为27.0°至29.0°的至少一个不同主要衍射峰的结晶酞菁。

公开(公告)号：US20090208249A1

公开(公告)日：2009-08-20

申请号：US12300853

申请日：2007-05-18

Applicant: Hiroe Fuchigami ,  Kozo Ishio

Inventor： Hiroe Fuchigami ,  Kozo Ishio

IPC: G03G15/00 ,  G03C5/56 ,  B02C23/18 ,  B02C15/00

CPC classification number: G03G5/104 ,  G03G5/0507 ,  G03G5/0525 ,  G03G5/144

Abstract: Provided is a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor exhibiting high stability. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a cumulative volume average diameter D50 of 0.1 μm or less and a volume particle size distribution width index SD satisfying the following Expression (1) which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer, 0.010≦SD≦0.040  (1) where SD=(D84−D16)/2, where D84 represents the particle diameter (μm) at a point of 84% in the cumulative volume particle size distribution curve, and D16 represents the particle diameter (μm) at a point of 16% in the cumulative volume particle size distribution curve.

Abstract translation: 提供一种用于形成表现出高稳定性的电子照相感光体的底涂层的涂布液。 在用于形成含有金属氧化物颗粒和粘合剂树脂的电子照相感光体的底涂层的涂布液中，金属氧化物颗粒的累积体积平均直径D50为0.1μm以下，体积粒径分布宽度指数SD满足以下 在用于形成底涂层的涂布液中通过动态光散射法测量的表达式（1）<？in-line-formula description =“In-line formula”end =“lead”？> 0.010 <= SD <= 0.040（1）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中SD =（D84-D16）/ 2，其中D84表示a 在累积体积粒径分布曲线中为84％，D16为累积体积粒度分布曲线中16％点处的粒径（母体）。

公开(公告)号：US08906586B2

公开(公告)日：2014-12-09

申请号：US12301361

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

IPC: G03G15/00 ,  B01F15/02 ,  B01F15/06 ,  G03G5/047 ,  B01F3/12 ,  G03G5/06 ,  B01F7/18 ,  B02C17/16 ,  G03G5/05

CPC classification number: B01F7/18 ,  B01F3/1221 ,  B01F15/0201 ,  B01F15/026 ,  B01F15/065 ,  B02C17/16 ,  G03G5/047 ,  G03G5/0525 ,  G03G5/0696

Abstract: A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 μm to 350 μm is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor. The charge-generating material preferably comprises a phthalocyanine pigment and the phthalocyanine pigment in the coating fluid preferably has a 50% cumulative particle diameter (D50) of 0.13 μm or smaller as determined by a dynamic light scattering method.

Abstract translation: 提供了具有高生产率和稳定性的感光层形成用涂布液及其工艺。 还提供了即使在各种使用环境中也能够形成高质量图像并且不太可能引起诸如黑点或彩色斑点的图像缺陷的高性能电子照相感光体和图像形成装置。 目的是通过一种制备用于形成电子照相感光体的感光层的涂布液的方法来实现的，并且包括电荷产生材料和粘合剂树脂，其中平均粒径在1.0的范围内的分散介质 使用μm至350μm作为用于将电荷产生材料分散在用于感光层形成的涂布液中的分散介质。 通过该方法生产的用于光敏层形成的涂布液优选作为电子照相感光体的感光层。 电荷产生材料优选包含酞菁颜料，并且涂布液中的酞菁颜料优选具有通过动态光散射法测定的0.13μm以下的50％累积粒径（D50）。

公开(公告)号：US20090257776A1

公开(公告)日：2009-10-15

申请号：US12301088

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

IPC: G03G15/00 ,  G03G5/04

CPC classification number: G03G5/0614 ,  G03G5/0525 ,  G03G5/104 ,  G03G5/144

Abstract: Provided is an electrophotographic photoreceptor that is excellent in electric characteristics and can form a high-quality image having reduced ghosting. In the electrophotographic photoreceptor including an undercoat layer containing metal oxide particles and a binder resin on an electroconductive support, and a photosensitive layer disposed on the undercoat layer, the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid containing the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3; and the photosensitive layer contains a compound represented by the following Formula (I): where Formula (I), Ar1 to Ar6 each independently represent an aromatic moiety that may have a substituent; X represents an organic moiety that may have a substituent; and n1 and n2 each independently represent an integer of 0 to 2.

Abstract translation: 本发明提供电特性优异的电子照相感光体，能够形成具有减少重影的高品质图像。 在包含在导电载体上含有金属氧化物颗粒和粘合剂树脂的底涂层的电子照相感光体和设置在底涂层上的感光层中，金属氧化物颗粒的体积平均粒径为0.1μm或更小，90％ 通过动态光散射法在含有分散在甲醇和1-丙醇的溶剂混合物中的底涂层的液体中以7:3的重量比测量的累积粒径为0.3μm或更小的累积粒径; 感光层含有由下式（I）表示的化合物：式（I）中，Ar 1〜Ar 6各自独立地表示可以具有取代基的芳香族部分。 X表示可以具有取代基的有机部分; n1和n2各自独立地表示0〜2的整数。

公开(公告)号：US20090208250A1

公开(公告)日：2009-08-20

申请号：US12301121

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami ,  Hiroaki Takamura ,  Yasunori Kawai

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami ,  Hiroaki Takamura ,  Yasunori Kawai

IPC: G03G15/00 ,  G03G15/04

CPC classification number: G03G5/144 ,  G03G5/056 ,  G03G5/0564 ,  G03G5/0614 ,  G03G5/0616

Abstract: An electrophotographic photoreceptor having high sensitivity and hardly affected by the transfer in an electrophotographic process is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3, and the photosensitive layer contains a binder resin having an ester bond.

Abstract translation: 提供了具有高灵敏度且几乎不受电子照相方法转印影响的电子照相感光体。 电子照相感光体包括含有金属氧化物颗粒和粘合剂树脂的底涂层和设置在底涂层上的感光层，其中金属氧化物颗粒的体积平均粒径为0.1μm以下，90％的累积粒径为0.3 通过动态光散射法在分散在甲醇和1-丙醇的溶剂混合物中的底涂层的液体中以重量比7:3进行测量的感光层含有具有 酯键。

公开(公告)号：US20090202274A1

公开(公告)日：2009-08-13

申请号：US12301361

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami

IPC: G03G15/00 ,  G03G5/00 ,  G03G5/06 ,  G03G15/06 ,  G03G15/02

CPC classification number: B01F7/18 ,  B01F3/1221 ,  B01F15/0201 ,  B01F15/026 ,  B01F15/065 ,  B02C17/16 ,  G03G5/047 ,  G03G5/0525 ,  G03G5/0696

Abstract: A coating fluid for photosensitive-layer formation having high productivity and stability and a process thereof are provided. Also provided are a high-performance electrophotographic photoreceptor and an image-forming apparatus which are capable of forming high-quality images even in various use environments and are less apt to cause image defects such as black spots or color spots. The objects are accomplished with a process for producing a coating fluid which is for forming a photosensitive layer of an electrophotographic photoreceptor and comprises a charge-generating material and a binder resin, wherein a dispersing medium having an average particle diameter in the range of from 1.0 μm to 350 μm is used as a dispersing medium for dispersing the charge-generating material in the coating fluid for photosensitive-layer formation. The coating fluid for photosensitive-layer formation produced by this process is preferable as a photosensitive layer of an electrophotographic photoreceptor. The charge-generating material preferably comprises a phthalocyanine pigment and the phthalocyanine pigment in the coating fluid preferably has a 50% cumulative particle diameter (D50) of 0.13 μm or smaller as determined by a dynamic light scattering method.

Abstract translation: 提供了具有高生产率和稳定性的感光层形成用涂布液及其工艺。 还提供了即使在各种使用环境中也能够形成高质量图像并且不太可能引起诸如黑点或彩色斑点的图像缺陷的高性能电子照相感光体和图像形成装置。 目的是通过一种制备用于形成电子照相感光体的感光层的涂布液的方法来实现的，并且包括电荷产生材料和粘合剂树脂，其中平均粒径在1.0的范围内的分散介质 作为用于将电荷产生材料分散在用于感光层形成的涂布液中的分散介质，使用了350微米。 通过该方法生产的用于光敏层形成的涂布液优选作为电子照相感光体的感光层。 电荷产生材料优选包含酞菁颜料，并且涂布液中的酞菁颜料优选具有通过动态光散射法测定的0.13μm或更小的累积粒径（D50）的50％。

公开(公告)号：US08420283B2

公开(公告)日：2013-04-16

申请号：US12300853

申请日：2007-05-18

Applicant: Hiroe Fuchigami ,  Kozo Ishio

Inventor： Hiroe Fuchigami ,  Kozo Ishio

IPC: G03G15/04

CPC classification number: G03G5/104 ,  G03G5/0507 ,  G03G5/0525 ,  G03G5/144

Abstract: Provided is a coating liquid for forming an undercoat layer of an electrophotographic photoreceptor exhibiting high stability. In the coating liquid for forming an undercoat layer of an electrophotographic photoreceptor containing metal oxide particles and a binder resin, the metal oxide particles have a cumulative volume average diameter D50 of 0.1 μm or less and a volume particle size distribution width index SD satisfying the following Expression (1) which are measured by a dynamic light-scattering method in the coating liquid for forming an undercoat layer, 0.010≦SD≦0.040  (1) where SD=(D84−D16)/2, where D84 represents the particle diameter (μm) at a point of 84% in the cumulative volume particle size distribution curve, and D16 represents the particle diameter (μm) at a point of 16% in the cumulative volume particle size distribution curve.

Abstract translation: 提供一种用于形成表现出高稳定性的电子照相感光体的底涂层的涂布液。 在用于形成含有金属氧化物颗粒和粘合剂树脂的电子照相感光体的底涂层的涂布液中，金属氧化物颗粒的累积体积平均直径D50为0.1μm以下，体积粒径分布宽度指数SD满足以下 用于形成底涂层的涂布液中的动态光散射法测定的表达式（1），其中SD =（D84-D16）/ 2，其中D84表示粒径 （μm）在累积体积粒度分布曲线中为84％的点，D16表示累积体积粒径分布曲线中16％点处的粒径（μm）。

公开(公告)号：US08404411B2

公开(公告)日：2013-03-26

申请号：US12301121

申请日：2007-05-18

Applicant: Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami ,  Hiroaki Takamura ,  Yasunori Kawai

Inventor： Teruyuki Mitsumori ,  Kozo Ishio ,  Hiroe Fuchigami ,  Hiroaki Takamura ,  Yasunori Kawai

IPC: G03G5/14

CPC classification number: G03G5/144 ,  G03G5/056 ,  G03G5/0564 ,  G03G5/0614 ,  G03G5/0616

Abstract: An electrophotographic photoreceptor having high sensitivity and hardly affected by the transfer in an electrophotographic process is provided. The electrophotographic photoreceptor includes an undercoat layer containing metal oxide particles and a binder resin and a photosensitive layer disposed on the undercoat layer, wherein the metal oxide particles have a volume average particle diameter of 0.1 μm or less and a 90% cumulative particle diameter of 0.3 μm or less which are measured by a dynamic light-scattering method in a liquid of the undercoat layer dispersed in a solvent mixture of methanol and 1-propanol at a weight ratio of 7:3, and the photosensitive layer contains a binder resin having an ester bond.

Abstract translation: 提供了具有高灵敏度且几乎不受电子照相方法转印影响的电子照相感光体。 电子照相感光体包括含有金属氧化物颗粒和粘合剂树脂的底涂层和设置在底涂层上的感光层，其中金属氧化物颗粒的体积平均粒径为0.1μm以下，90％的累积粒径为0.3 μm以下，其通过动态光散射法在分散在甲醇和1-丙醇的溶剂混合物中的底涂层的液体中以重量比7:3的比例测量，并且感光层含有具有 酯键。