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公开(公告)号：US10386739B2
公开(公告)日：2019-08-20
申请号：US15945145
申请日：2018-04-04
Applicant: ZEON CORPORATION
Inventor： Ryo Tsumura , Junichi Takashima , Fuminari Oyama
Abstract: The present invention is to provide a toner production method configured to prevent scale formation, be resistant to pipe clogging, and realize stable and efficient toner production, even in the case of long-term continuous production. Disclosed is a toner production method comprising: a dispersing step for obtaining a colorant dispersion by, in a stirring tank, (a) dispersing or dissolving a colorant and a charge control agent in a polymerizable monomer, or (b) dispersing or dissolving a binder resin, a colorant and a charge control agent in an organic solvent, and a droplets forming step by suspending the colorant dispersion in an aqueous dispersion medium, wherein, in the dispersing step, the binder resin, colorant or charge control agent is added to the polymerizable monomer or organic solvent in the stirring tank, from a hopper, through a pipe heated by a heating device.
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公开(公告)号：US20180292764A1
公开(公告)日：2018-10-11
申请号：US15945145
申请日：2018-04-04
Applicant: ZEON CORPORATION
Inventor： Ryo Tsumura , Junichi Takashima , Fuminari Oyama
CPC classification number: G03G9/0806 , G03G9/0812 , G03G9/08728 , G03G9/08793 , G03G9/0918
Abstract: The present invention is to provide a toner production method configured to prevent scale formation, be resistant to pipe clogging, and realize stable and efficient toner production, even in the case of long-term continuous production. Disclosed is a toner production method comprising: a dispersing step for obtaining a colorant dispersion by, in a stirring tank, (a) dispersing or dissolving a colorant and a charge control agent in a polymerizable monomer, or (b) dispersing or dissolving a binder resin, a colorant and a charge control agent in an organic solvent, and a droplets forming step by suspending the colorant dispersion in an aqueous dispersion medium, wherein, in the dispersing step, the binder resin, colorant or charge control agent is added to the polymerizable monomer or organic solvent in the stirring tank, from a hopper, through a pipe heated by a heating device.
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公开(公告)号：US20170248857A1
公开(公告)日：2017-08-31
申请号：US15434430
申请日：2017-02-16
Applicant: ZEON CORPORATION
Inventor： Fuminari Oyama , Nobuhiko Okamoto , Hironori Toshimitu , Satoshi Izumi , Bunta Yasuda , Koichi Emura
CPC classification number: G03G9/0815 , B07B1/4618 , B07B1/4663 , B07B1/4681 , B07B7/06 , G03G9/0926
Abstract: A method for efficiently producing a toner for developing electrostatic images, which contains very few coarse particles and having excellent printing characteristics. The method can comprise a sieving step of removing coarse particles from colored resin particles by, using an air flow, suppling the colored resin particles to a sieve, wherein a metal mesh laminate comprising at least two metal meshes attached to each other by sintering, the metal meshes being different in opening size, is used as the sieve; wherein the metal meshes of the metal mesh laminate are laminated in order of opening size and, of the metal meshes constituting the metal mesh laminate, one having a smallest opening size is disposed on a side of supplying the colored resin particles; and wherein the opening size of the metal mesh having the smallest opening size is in a range of from 32 to 110 μm.
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Patent Agency Ranking
公开(公告)号：US10899851B2
公开(公告)日：2021-01-26
申请号：US16218792
申请日：2018-12-13
Applicant: ZEON CORPORATION
Inventor： Fuminari Oyama
Abstract: A method for producing a hydrogenated conjugated diene polymer latex includes: a hydrogenation step of dissolving or dispersing a hydrogenation catalyst containing a platinum group element in a latex of a conjugated diene polymer to hydrogenate a carbon-carbon unsaturated bond in the conjugated diene polymer; and an insoluble complex formation step of complexing the platinum group element in the latex with a complexing agent to form an insoluble complex, wherein pH of the latex at the insoluble complex formation step is controlled in a range of 5.0 to 8.0.
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公开(公告)号：US10801572B2
公开(公告)日：2020-10-13
申请号：US16086799
申请日：2017-03-16
Applicant: ZEON CORPORATION
Inventor： Fuminari Oyama , Yasuaki Watanabe
IPC: F16D69/02 , C08K3/20 , C08L101/00 , C08J3/205 , C08L15/00 , C09K3/14 , C08K5/46 , C08F236/12 , C08K5/47 , C08L9/04 , C08K5/00
Abstract: A method for producing a composition containing a latex of a nitrile rubber of α,β-ethylenically unsaturated nitrile monomer unit of 8 to 60 wt % content, and an iodine value of 120 or less, an isothiazoline-based compound represented by formula (1), and a benzisothiazoline-based compound represented by formula (2), both in a content of 26 ppm by weight or more to the rubber, wherein adding both compounds to the latex at 2,000 ppm by weight/min or less, at 50° C. or lower, and the compounds in an aqueous state having 0.1 to 40 wt % concentration. formula (1), R1 and formula (2), R4 represents a hydrogen atom, or a substituted or unsubstituted organic group; wherein formula (1) R2 and R3 represent a hydrogen atom, a halogen atom, or an substituted organic group; and formula (2), R5 represent a hydrogen atom, or an substituted organic group, and an integer “n” of 0 to 4.
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公开(公告)号：US11067145B2
公开(公告)日：2021-07-20
申请号：US16086799
申请日：2017-03-16
Applicant: ZEON CORPORATION
Inventor： Fuminari Oyama , Yasuaki Watanabe
IPC: F16D69/02 , C08K3/20 , C08K5/46 , C08K5/47 , C08L9/04 , C08L15/00 , C08L101/00 , C09K3/14 , C08J3/205 , C08F236/12 , C08K5/00
Abstract: A method for producing a composition containing a latex of a nitrile rubber of α,β-ethylenically unsaturated nitrile monomer unit of 8 to 60 wt % content, and an iodine value of 120 or less, an isothiazoline-based compound represented by formula (1), and a benzisothiazoline-based compound represented by formula (2), both in a content of 26 ppm by weight or more to the rubber, wherein adding both compounds to the latex at 2,000 ppm by weight/min or less, at 50° C. or lower, and the compounds in an aqueous state having 0.1 to 40 wt % concentration. formula (1), R1 and formula (2), R4 represents a hydrogen atom, or a substituted or unsubstituted organic group; wherein formula (1) R2 and R3 represent a hydrogen atom, a halogen atom, or an substituted organic group; and formula (2), R5 represent a hydrogen atom, or an substituted organic group, and an integer “n” of 0 to 4.
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公开(公告)号：US10365570B2
公开(公告)日：2019-07-30
申请号：US15434430
申请日：2017-02-16
Applicant: ZEON CORPORATION
Inventor： Fuminari Oyama , Nobuhiko Okamoto , Hironori Toshimitu , Satoshi Izumi , Bunta Yasuda , Koichi Emura
Abstract: A method for efficiently producing a toner for developing electrostatic images, which contains very few coarse particles and having excellent printing characteristics. The method can comprise a sieving step of removing coarse particles from colored resin particles by, using an air flow, supplying the colored resin particles to a sieve, wherein a metal mesh laminate comprising at least two metal meshes attached to each other by sintering, the metal meshes being different in opening size, is used as the sieve; wherein the metal meshes of the metal mesh laminate are laminated in order of opening size and, of the metal meshes constituting the metal mesh laminate, one having a smallest opening size is disposed on a side of supplying the colored resin particles; and wherein the opening size of the metal mesh having the smallest opening size is in a range of from 32 to 110 μm.
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公开(公告)号：US10409182B2
公开(公告)日：2019-09-10
申请号：US15434430
申请日：2017-02-16
Applicant: ZEON CORPORATION
Inventor： Fuminari Oyama , Nobuhiko Okamoto , Hironori Toshimitu , Satoshi Izumi , Bunta Yasuda , Koichi Emura
Abstract: A method for efficiently producing a toner for developing electrostatic images, which contains very few coarse particles and having excellent printing characteristics. The method can comprise a sieving step of removing coarse particles from colored resin particles by, using an air flow, supplying the colored resin particles to a sieve, wherein a metal mesh laminate comprising at least two metal meshes attached to each other by sintering, the metal meshes being different in opening size, is used as the sieve; wherein the metal meshes of the metal mesh laminate are laminated in order of opening size and, of the metal meshes constituting the metal mesh laminate, one having a smallest opening size is disposed on a side of supplying the colored resin particles; and wherein the opening size of the metal mesh having the smallest opening size is in a range of from 32 to 110 μm.
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