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1
JP2018013635A
Publication/Patent Number: JP2018013635A
Publication date: 2018-01-25
Application number: 2016143545
Filing date: 2016-07-21
Assignee: CANON INC
Abstract: 【課題】常温常湿下だけでなく、低温低湿下であっても、高感度、特に半導体レーザー波長領域で高感度であり、なおかつ、ゴーストなどの画像欠陥の少ない画像を供給可能な電子写真感光体、該電子写真感光体を有するプロセスカートリッジおよび電子写真装置を提供する。【解決手段】導電性支持体上に電荷発生物質を含有する電荷発生層と電荷輸送物質を含有する電荷輸送層とをこの順に電子写真感光体において、該電荷発生層が、ジアリールホスフィンスルフィド構造を有する化合物、およびジアリールホスフィンオキシド構造を有する化合物から選択される少なくとも1種の化合物を含有する層である。【選択図】なし 【課題】常温常湿下だけでなく、低温低湿下であっても、高感度、特に半導体レーザー波長領域で高感度であり、なおかつ、ゴーストなどの画像欠陥の少ない画像を供給可能な電子写真感光体、該電子写真感光体を有するプロセスカートリッジおよび電子写真装置を提供する。【解決手段】導電性支持体上に電荷発生物質を含有する電荷発生層と電荷輸送物質を含有する電荷輸送層とをこの順に電子写真感光体において、該電荷発生層が、ジアリールホスフィンスルフィド構造を有する化合物、およびジアリールホスフィンオキシド構造を有する化合物から選択される少なくとも1種の化合物を含有する層である。【選択図 ...more ...less
2
US201859558A1
Publication/Patent Number: US201859558A1
Publication date: 2018-03-01
Application number: 20/171,566
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
3
US2018031985A1
Publication/Patent Number: US2018031985A1
Publication date: 2018-02-01
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
4
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
5
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
6
JP2017190397A
Publication/Patent Number: JP2017190397A
Publication date: 2017-10-19
Application number: 2016080501
Filing date: 2016-04-13
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method of a phthalocyanine crystal having improved level of ghost at use initiation and after repeated use and suppressed variation.SOLUTION: There is provided a manufacturing method for obtaining a phthalocyanine crystal by mixing a phthalocyanine compound obtained by acid pasting and an organic compound and conducting crystal transformation PROBLEM TO BE SOLVED: To provide a manufacturing method of a phthalocyanine crystal having improved level of ghost at use initiation and after repeated use and suppressed variation.SOLUTION: There is provided a manufacturing method for obtaining a phthalocyanine crystal by ...more ...less
7
JP2017075115A
Publication/Patent Number: JP2017075115A
Publication date: 2017-04-20
Application number: 2015203010
Filing date: 2015-10-14
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide a production method of a hydroxygallium phthalocyanine crystal having excellent characteristics as a charge generating substance
8
US9778581B2
Publication/Patent Number: US9778581B2
Publication date: 2017-10-03
Application number: 14/607,868
Filing date: 2015-01-28
Abstract: An electrophotographic photosensitive member includes a hole transporting layer containing a polyester resin having a structural unit expressed by formula (1) as a hole transporting substance.
9
US9665020B2
Publication/Patent Number: US9665020B2
Publication date: 2017-05-30
Application number: 14/664,678
Filing date: 2015-03-20
Abstract: A charge transporting layer of an electrophotographic photosensitive member contains a polysiloxane resin having a terminal structure represented by the formula (1), at least one selected from the group consisting of a polycarbonate resin A having a structural unit represented by the formula (A) and a polyarylate resin B having a structural unit represented by the formula (B), and a charge transporting substance, wherein the content of the siloxane structure in the polysiloxane resin is not less than 0.5% by mass and not more than 10% by mass based on the total mass of whole resin in the charge transporting layer. A charge transporting layer of an electrophotographic photosensitive member contains a polysiloxane resin having a terminal structure represented by the formula (1), at least one selected from the group consisting of a polycarbonate resin A having a structural unit represented ...more ...less
10
JP6161297B2
Publication/Patent Number: JP6161297B2
Publication date: 2017-07-12
Application number: 2013007316
Filing date: 2013-01-18
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which achieves reduction in an initial frictional force (initial friction coefficient) and suppression of a plus memory
11
JP6214321B2
Publication/Patent Number: JP6214321B2
Publication date: 2017-10-18
Application number: 2013214108
Filing date: 2013-10-11
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that contains a siloxane-modified resin
12
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
13
US2017123330A1
Publication/Patent Number: US2017123330A1
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
14
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
15
JP2016164658A
Publication/Patent Number: JP2016164658A
Publication date: 2016-09-08
Application number: 2016034902
Filing date: 2016-02-25
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high-quality image having improved potential variation after repeated use; and to provide a process cartridge and an electrophotographic device which have the electrophotographic photoreceptor.SOLUTION: An electrophotographic photoreceptor has a support PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high-quality image having improved potential variation after repeated use; and to provide a process cartridge and an electrophotographic device which have the electrophotographic ...more ...less
16
US2016252832A1
Publication/Patent Number: US2016252832A1
Publication date: 2016-09-01
Application number: 15/054,006
Filing date: 2016-02-25
Abstract: Provided is an electrophotographic photosensitive member including a support and a photosensitive layer. The photosensitive layer contains crystalline complexes of hydroxygallium phthalocyanine and chlorogallium phthalocyanine, the crystalline complexes containing an amide compound represented by Formula (1): R1—NHCHO, where R1 represents a methyl group, a propyl group, or a vinyl group. Provided is an electrophotographic photosensitive member including a support and a photosensitive layer. The photosensitive layer contains crystalline complexes of hydroxygallium phthalocyanine and chlorogallium phthalocyanine, the crystalline complexes containing an amide ...more ...less
17
US2016252833A1
Publication/Patent Number: US2016252833A1
Publication date: 2016-09-01
Application number: 15/055,238
Filing date: 2016-02-26
Abstract: An electrophotographic photosensitive member includes a support member, a charge generating layer, and a charge transport layer in that order. The charge generating layer contains a gallium phthalocyanine crystal containing therein at least one amide compound selected from the group consisting of N-methylformamide, N-propylformamide, and N-vinylformamide. The charge transport layer contains fluorine-containing resin particles and a fluorine-containing copolymer. An electrophotographic photosensitive member includes a support member, a charge generating layer, and a charge transport layer in that order. The charge generating layer contains a gallium phthalocyanine crystal containing therein at least one amide compound selected from the ...more ...less
18
JP2016164659A
Publication/Patent Number: JP2016164659A
Publication date: 2016-09-08
Application number: 2016034903
Filing date: 2016-02-25
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of suppressing an image defect due to a ghost phenomenon
19
JP2016061900A
Publication/Patent Number: JP2016061900A
Publication date: 2016-04-25
Application number: 2014189086
Filing date: 2014-09-17
Assignee: CANON INC
Abstract: PROBLEM TO BE SOLVED: To provide a process cartridge that improves slidability between and durability of an interval guaranteeing member and an electrophotographic photoreceptor
20
US2016154326A1
Publication/Patent Number: US2016154326A1
Publication date: 2016-06-02
Application number: 14/927,300
Filing date: 2015-10-29
Abstract: The charge generating layer includes a gallium phthalocyanine crystal in which an organic compound (P) is contained, the organic compound (P) 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 (P) is 0.1% by mass or more and 1.5% by mass or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and the charge transporting layer includes a resin having a siloxane structure, and a compound (Q) having a boiling point of 150° C. or more at 1 atm. The charge generating layer includes a gallium phthalocyanine crystal in which an organic compound (P) is contained, the organic compound (P) is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide ...more ...less