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1
US10209637B2
Publication/Patent Number: US10209637B2
Publication date: 2019-02-19
Application number: 15/663,421
Filing date: 2017-07-28
Abstract: An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The ...more ...less
2
US20190121251A1
Publication/Patent Number: US20190121251A1
Publication date: 2019-04-25
Application number: 16/230,617
Filing date: 2018-12-21
Abstract: An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The ...more ...less
3
JP2018045138A
Publication/Patent Number: JP2018045138A
Publication date: 2018-03-22
Application number: 2016180807
Filing date: 2016-09-15
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having excellent electrical characteristics, with endurance potential variations reduced.SOLUTION: A electrophotographic photoreceptor has a support, a charge generating layer, and a charge transportation layer, in the stated order, the charge transportation layer containing a polycarbonate resin having a structural unit represented by formula (1). In the charge transportation layer, the content of a compound having a phenolic hydroxyl group is 500 ppm or less.SELECTED DRAWING: None PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having excellent electrical characteristics, with endurance potential variations reduced.SOLUTION: A electrophotographic photoreceptor has a support, a charge generating layer, and a charge transportation ...more ...less
4
US20180314171A1
Publication/Patent Number: US20180314171A1
Publication date: 2018-11-01
Application number: 15/961,756
Filing date: 2018-04-24
Abstract: An electrophotographic photosensitive member includes a support member, a charge generating layer containing a phthalocyanine pigment as a charge generating material, a charge transport layer containing a charge transporting material in this order. The charge generating layer has a thickness of less than 200 nm, and the phthalocyanine pigment includes phthalocyanine crystalline particles having a particle size distribution and satisfies a requirement that the volume average of the products of Φi and Ψi is 0.31 or more. An electrophotographic photosensitive member includes a support member, a charge generating layer containing a phthalocyanine pigment as a charge generating material, a charge transport layer containing a charge transporting material in this order. The charge generating layer ...more ...less
5
US20180059558A1
Publication/Patent Number: US20180059558A1
Publication date: 2018-03-01
Application number: 15/667,715
Filing date: 2017-08-03
Abstract: An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member including a support, a charge generation layer, a charge transport layer containing a charge transporting material, and a protective layer, in the order presented, wherein the charge transport layer contains a polycarbonate resin having a structure selected from a group A and a structure selected from a group B, and the protective layer includes a cured material of a composition containing a compound having at least a functional group selected from chain-polymerizable functional groups and sequential polymerizable functional groups. An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member ...more ...less
6
CN107678254A
Publication/Patent Number: CN107678254A
Publication date: 2018-02-09
Application number: 201710637340
Filing date: 2017-07-31
Abstract: The invention provides an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. The electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. The invention provides an electrophotographic photosensitive member, a process cartridge, and an electrophotographic apparatus. The electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge ...more ...less
7
DE102017117241A1
Publication/Patent Number: DE102017117241A1
Publication date: 2018-02-01
Application number: 102017117241
Filing date: 2017-07-31
Abstract: Ein elektrophotographisches photosensitives Element beinhaltet einen Träger
8
JP2018025780A
Publication/Patent Number: JP2018025780A
Publication date: 2018-02-15
Application number: 2017144953
Filing date: 2017-07-26
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that is excellent in durability and has sufficient performance of an electrophotographic photoreceptor.SOLUTION: An electrophotographic photoreceptor includes a substrate, a charge generating layer containing a charge generating material, and a charge transport layer containing a charge transport material in this order, and the charge transport layer is a surface layer. The charge transport layer contains a polycarbonate resin having a specific structural unit.SELECTED DRAWING: None PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that is excellent in durability and has sufficient performance of an electrophotographic photoreceptor.SOLUTION: An electrophotographic photoreceptor includes a substrate, a charge generating layer containing ...more ...less
9
JP2018036630A
Publication/Patent Number: JP2018036630A
Publication date: 2018-03-08
Application number: 2017158076
Filing date: 2017-08-18
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which suppresses fluctuation in potential even when a protective layer formed of a cured product of a composition having a polymerizable functional group is used.SOLUTION: An electrophotographic photoreceptor has a support, a charge generating layer, a charge transport layer containing a charge transport substance and a protective layer in this order, where the charge transport layer contains a polycarbonate resin having a structure selected from group A and a structure selected from group B, and the protective layer is formed of a cured product of a composition containing a compound having at least one polymerizable functional group selected from a chain polymerizable functional group and a sequential polymerizable functional group.SELECTED DRAWING: None PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which suppresses fluctuation in potential even when a protective layer formed of a cured product of a composition having a polymerizable functional group is used.SOLUTION: An electrophotographic photoreceptor ...more ...less
10
US9921499B2
Publication/Patent Number: US9921499B2
Publication date: 2018-03-20
Application number: 15/334,884
Filing date: 2016-10-26
Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42. An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a ...more ...less
11
US09864284B2
Publication/Patent Number: US09864284B2
Publication date: 2018-01-09
Application number: 15/054,009
Filing date: 2016-02-25
Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B. An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...more ...less
12
EP3062153B1
Publication/Patent Number: EP3062153B1
Publication date: 2018-09-26
Application number: 16156831.6
Filing date: 2016-02-23
Abstract: An electrophotographic photosensitive member (1) has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure). An electrophotographic photosensitive member (1) has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...more ...less
13
JP2017083585A
Publication/Patent Number: JP2017083585A
Publication date: 2017-05-18
Application number: 2015210100
Filing date: 2015-10-26
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which can output an image having less image defects caused by a ghost phenomenon even in not only normal temperature and normal humidity environment but also low temperature and low humidity environment that is a particularly severe condition PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which can output an image having less image defects caused by a ghost phenomenon even in not only normal temperature and normal humidity environment but also low temperature and low humidity environment that ...more ...less
14
US20170123330A1
Publication/Patent Number: US20170123330A1
Publication date: 2017-05-04
Application number: 15/334,884
Filing date: 2016-10-26
Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42. An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a ...more ...less
15
JP2017083842A
Publication/Patent Number: JP2017083842A
Publication date: 2017-05-18
Application number: 2016211018
Filing date: 2016-10-27
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of achieving high level suppression effect of ghost phenomenon while maintaining chargeability required as the electrophotographic photoreceptor.SOLUTION: The electrophotographic photoreceptor has: a support medium; and a photosensitive layer containing a phthalocyanine pigment. In the phthalocyanine pigment PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of achieving high level suppression effect of ghost phenomenon while maintaining chargeability required as the electrophotographic photoreceptor.SOLUTION: The electrophotographic photoreceptor has: a ...more ...less
16
US9753385B2
Publication/Patent Number: US9753385B2
Publication date: 2017-09-05
Application number: 15/054,017
Filing date: 2016-02-25
Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure). An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...more ...less
17
JP2016102858A
Publication/Patent Number: JP2016102858A
Publication date: 2016-06-02
Application number: 2014240047
Filing date: 2014-11-27
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting an image with fewer image defects by ghost development not only in a normal temperature and normal humidity environment but in a low temperature and low humidity environment that means particularly severe conditions PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting an image with fewer image defects by ghost development not only in a normal temperature and normal humidity environment but in a low temperature and low humidity environment that means ...more ...less
18
JP2016102933A
Publication/Patent Number: JP2016102933A
Publication date: 2016-06-02
Application number: 2014241864
Filing date: 2014-11-28
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high-quality image
19
US20160154328A1
Publication/Patent Number: US20160154328A1
Publication date: 2016-06-02
Application number: 14/943,830
Filing date: 2015-11-17
Abstract: To provide an electrophotographic photosensitive member that can allow a high-quality image, in which photomemory after repeated use in a high-speed process is suppressed, to be output, as well as a process cartridge and an electrophotographic apparatus including the electrophotographic photosensitive member. An electrophotographic photosensitive member wherein a charge generating layer includes a gallium phthalocyanine crystal in which an organic compound is contained, wherein the organic compound is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound is 0.1% by mass or more and 2.0% by mass or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and a charge transporting layer includes a polycarbonate resin having structural units represented by the following formula (1). To provide an electrophotographic photosensitive member that can allow a high-quality image, in which photomemory after repeated use in a high-speed process is suppressed, to be output, as well as a process cartridge and an electrophotographic apparatus including the ...more ...less
20
JP2016110086A
Publication/Patent Number: JP2016110086A
Publication date: 2016-06-20
Application number: 2015210097
Filing date: 2015-10-26
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high quality image having a photo memory improved after repeated use in a high-speed process