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公开(公告)号：US20220342326A1
公开(公告)日：2022-10-27
申请号：US17705063
申请日：2022-03-25
发明人： Jun AZUMA , Keiji MARUO , Kenji KITAGUCHI
IPC分类号： G03G5/05 , C08G63/672
摘要： A polyarylate resin includes repeating units represented by formulas (1), (2), (3), and (4). A third percentage is greater than 0% and less than 50%. The third percentage is a percentage of the number of repeats of the repeating unit represented by formula (3) relative to the total of the number of repeats of the repeating unit represented by formula (1) and the number of repeats of the repeating unit represented by formula (3). A fourth percentage is at least 35% and less than 70%. The fourth percentage is a percentage of the number of repeats of the repeating unit represented by formula (4) relative to the total of the number of repeats of the repeating unit represented by formula (2) and the number of repeats of the repeating unit represented by formula (4).
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公开(公告)号：US20220308472A1
公开(公告)日：2022-09-29
申请号：US17701330
申请日：2022-03-22
发明人： Jun AZUMA , Keiji MARUO , Kenji KITAGUCHI
IPC分类号： G03G5/05 , C08G63/193 , G03G5/047
摘要： A polyarylate resin includes repeating units (1), (2), and (4). The polyarylate resin further includes a repeating unit (3) and a percentage of the number of repeats of the repeating unit (3) relative to the total number of repeats of each of the repeating units (1) and (3) is greater than 0% and less than 50%. Alternatively, the polyarylate resin does not include the repeating unit (3).
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3.发明申请公开(公告)号：US20220100111A1
公开(公告)日：2022-03-31
申请号：US17481652
申请日：2021-09-22
发明人： Yuko IWASHITA , Kazunari HAMASAKI , Jun AZUMA
摘要： An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single layer and contains a charge generating material, an electron transport material, a binder resin, and a hole transport material. The electron transport material includes a compound represented by general formula (1): In general formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom, an alkyl group, a heterocyclic group, an alkoxy group, an aralkyl group, an allyl group, or an aryl group optionally substituted with at least 1 and no more than 5 substituents selected from the group consisting of a halogen atom, an alkyl group, and alkoxy group.
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4.发明申请公开(公告)号：US20200231535A1
公开(公告)日：2020-07-23
申请号：US16632197
申请日：2018-07-17
发明人： Jun AZUMA , Kensuke KOJIMA , Tomofumi SHIMIZU , Hideki OKADA
IPC分类号： C07C211/54 , G03G5/047 , G03G5/06 , G03G5/05 , C07C209/06
摘要： A compound is represented by general formula (1). In general formula (1), R1 and R2 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R1 and the number of carbon atoms of the chemical group represented by R2 is 2. R3 and R4 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R3 and the number of carbon atoms of the chemical group represented by R1 is 2. A photosensitive layer of an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound represented by general formula (1)
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公开(公告)号：US20200115313A1
公开(公告)日：2020-04-16
申请号：US16575125
申请日：2019-09-18
发明人： Jun AZUMA
摘要： A naphthalenedicarboxylic acid dichloride production method includes causing a reaction between naphthalenedicarboxylic acid and a chlorinating agent at a reaction temperature of 20° C. or higher and 75° C. or lower in presence of a solvent including tetrahydrofuran. The causing a reaction in the naphthalenedicarboxylic acid dichloride production method is preferably performed in presence of N,N-disubstituted formamide.
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6.发明申请公开(公告)号：US20190354027A1
公开(公告)日：2019-11-21
申请号：US16472178
申请日：2017-11-30
发明人： Tomofumi SHIMIZU , Jun AZUMA , Keiji MARUO
摘要： An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer (3c) and contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin includes a polyarylate resin represented by general formula (1). In general formula (1), Q1, Q2, Q3, and Q4 each represent a methyl group or a hydrogen atom. r, s, t, and u each represent a number greater than or equal to 15 and less than or equal to 35. X and Y each represent a divalent group represented by chemical formula (2A), chemical formula (2B), chemical formula (2C), or chemical formula (2D)
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7.发明申请公开(公告)号：US20190332023A1
公开(公告)日：2019-10-31
申请号：US16471154
申请日：2017-11-30
发明人： Tomofumi SHIMIZU , Keiji MARUO , Jun AZUMA
IPC分类号： G03G5/05 , C08L67/03 , C09B47/30 , C07D471/04 , C07D231/18 , G03G5/06
摘要： An electrophotographic photosensitive member (1) includes a conductive substrate (2) and a photosensitive layer (3). The photosensitive layer (3) is a single-layer photosensitive layer (3c) and contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The binder resin includes a polyarylate resin represented by general formula (1). In general formula (1), Q1, Q2, Q3, and Q4 each represent a methyl group or a hydrogen atom. r, s, t, and u each represent a number greater than or equal to 15 and less than or equal to 35. X and Y each represent a divalent group represented by chemical formula (2A), chemical formula (2B), chemical formula (2C), or chemical formula (2D), and X and Y are different from each other
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公开(公告)号：US20150338754A1
公开(公告)日：2015-11-26
申请号：US14719911
申请日：2015-05-22
发明人： Jun AZUMA , Keiji MARUO , Kensuke OKAWA , Akihiko OGATA
CPC分类号： G03G5/047 , G03G5/0614 , G03G5/0672 , G03G5/0696
摘要： 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.
摘要翻译： 电子照相感光构件包括导电衬底和感光层。 感光层包括电荷产生层和位于电荷产生层上的电荷传输层。 电荷输送层含有相对于曝光光的波长吸收的颜料。 颜料是由通式（I）表示的金属酞菁颜料或由通式（II）表示的无金属酞菁颜料，其中X表示硫原子或氧原子。 R1表示芳基或烷基。 R 2 -R 4各自表示氢原子，烷基，芳基，烷氧基，苯氧基，烷硫基，苯硫基或二烷基氨基。 M表示金属原子。 Y表示非取代或烷基，烷氧基，芳氧基，卤素原子，氧原子或羟基。
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公开(公告)号：US20150261106A1
公开(公告)日：2015-09-17
申请号：US14656102
申请日：2015-03-12
发明人： Jun AZUMA , Kensuke OKAWA , Akihiko OGATA , Takahiro OKI
CPC分类号： G03G5/0614 , G03G5/0507 , G03G5/0564 , G03G5/0672 , G03G5/14704
摘要： An electrophotographic photosensitive member includes a photosensitive layer. The photosensitive layer is a single-layer photosensitive layer or a multi-layer photosensitive layer having a charge transport layer as an outermost layer. Silica particles are contained in the photosensitive layer in an amount of no less than 0.5 parts by mass and no greater than 15 parts by mass relative to 100 parts by mass of a binder resin. The binder resin includes a polycarbonate resin represented by the general formula (1a) or the general formula (1b).
摘要翻译： 电子照相感光构件包括感光层。 感光层是具有作为最外层的电荷输送层的单层感光层或多层感光层。 相对于100质量份的粘合剂树脂，二氧化硅颗粒以不小于0.5质量份且不大于15质量份的量包含在感光层中。 粘合剂树脂包括由通式（1a）或通式（1b）表示的聚碳酸酯树脂。
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公开(公告)号：US20190384190A1
公开(公告)日：2019-12-19
申请号：US16443624
申请日：2019-06-17
发明人： Jun AZUMA , Kensuke KOJIMA
IPC分类号： G03G5/06 , C07C211/54 , G03G5/05
摘要： A bis-butadiene derivative is represented by general formula (1) shown below. In general formula (1), Ra, Rb, and Rc each represent, independently of one another, an alkyl group having a carbon number of at least 1 and no greater than 8 or an alkoxy group having a carbon number of at least 1 and no greater than 8. l and m each represent, independently of one another, an integer of at least 0 and no greater than 5. n represents an integer of at least 0 and no greater than 4. Chemical groups Ra may be the same as or different from each other. Chemical groups Rb may be the same as or different from each other. Chemical groups Rc may be the same as or different from each other.
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