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公开(公告)号：US20240367132A1
公开(公告)日：2024-11-07
申请号：US18574182
申请日：2022-07-05
Applicant: ZEON CORPORATION
Inventor： Masashi Watanabe , Sakyo Yagyu
IPC: B01J13/16 , C08F2/44 , C08F212/12 , C08F212/36 , C08F222/10
Abstract: Hollow particles which comprise a resin-containing shell and a hollow portion surrounded by the shell, wherein a void ratio is 50% or more; wherein the shell contains, as the resin, a polymer in which 60 to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; wherein the hollow particles have at least one kind of reactive group selected from a hydroxy group and an amino group on a surface thereof and the hydroxyl value is 0.20 mmol/g or more or the amine value is 0.20 mmol/g or more, or wherein the hollow particles have at least one kind of reactive group selected from the group consisting of a carboxy group, a carboxylic anhydride group and a sulfo group on a surface thereof and the acid value is 0.20 mmol/g or more.
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公开(公告)号：US20230383021A1
公开(公告)日：2023-11-30
申请号：US18031815
申请日：2021-10-26
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu
Abstract: A method for producing hollow particles which have a void ratio of 50% or more, the method comprising: preparing a mixture liquid containing a polymerizable monomer, a hydrophobic solvent, an aqueous medium, etc., suspending the mixture liquid to prepare a suspension in which droplets of a monomer composition containing the polymerizable monomer, the hydrophobic solvent, etc., are dispersed in the aqueous medium, and subjecting the suspension to a polymerization reaction to prepare a precursor composition containing precursor particles having a hollow portion surrounded by a shell and filled with the hydrophobic solvent, wherein the polymerizable monomer a hydrocarbon monomer, and in 100% by mass of the polymerizable monomer, a content of a crosslinkable monomer containing two or more ethylenically unsaturated double bonds is 70% by mass or more, and wherein the hydrophobic solvent is a hydrocarbon solvent containing 5 to 8 carbon atoms.
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公开(公告)号：US11789375B2
公开(公告)日：2023-10-17
申请号：US17271719
申请日：2019-08-30
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu
CPC classification number: G03G9/09733 , G03G9/0821
Abstract: The present invention provides a toner for electrostatic-image development comprising a color resin particle containing a binder resin, a colorant, a charge control agent, and a release agent, and an additive having a polydiene structure, wherein the additive having the polydiene structure has a solubility in styrene at a temperature of 40° C. of 3 to 40 g/100 g, when a cross section of the color resin particle is observed by a transmission electron microscope (TEM), the number of crystal domains of the release agent having an aspect ratio in a range of 2 to 10 in a field of view of 2 μm×2 μm square of the cross section of the color resin particle is 2 to 30.
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4.发明授权公开(公告)号：US10901336B2
公开(公告)日：2021-01-26
申请号：US16486895
申请日：2018-02-28
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu , Takeru Chiba
Abstract: Provided is a positively-chargeable toner for developing electrostatic images excellent in printing durability, charge stability, and conveyance amount stability. The toner comprises colored resin particles comprising a binder resin and a colorant, and an external additive, wherein the external additive comprises spherical silica particles with a number average particle diameter of 70 to 200 nm. wherein the external additive has a particle size distribution in which a percentage of a number of particles having a particle diameter of 50 nm or more is 75% or more, which is calculated based on a SEM image.
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5.发明申请公开(公告)号：US20240416313A1
公开(公告)日：2024-12-19
申请号：US18702587
申请日：2022-10-25
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu
IPC: B01J13/16
Abstract: To provide hollow particles excellent in dielectric property and solvent resistance and able to decrease the permittivity and dielectric dissipation factor of a resin molded body, and a method for producing the hollow particles. Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell and which have a void ratio of 50% or more, wherein the shell contains, as the resin, a polymer in which 70% by mass or more of a crosslinkable hydrocarbon monomer unit is contained, and wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of toluene and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25° C., less than 5% by mass of the hollow particles submerge in the toluene.
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Patent Agency Ranking
公开(公告)号：US20230185211A1
公开(公告)日：2023-06-15
申请号：US18003253
申请日：2021-06-25
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu , Takeshi Hirata
IPC: G03G9/097 , C08F236/10 , G03G9/087
CPC classification number: G03G9/09733 , C08F236/10 , G03G9/08728 , C08F2810/20 , C08F2800/20
Abstract: Provided is a toner for development of electrostatic images comprising colored resin particles containing a binder resin, a colorant, a charge control agent, and a release agent, wherein the colored resin particles have a storage modulus G′ (60) at 60° C. of 1.0×108 to 5.0×108 Pa, a storage modulus G′ (100) at 100° C. of 8.0×104 to 2.3×105 Pa, and a storage modulus G′ (150) at 150° C. of 1.4×104 to 3.0×104 Pa, these storage moduli being determined by dynamic viscoelastic analysis.
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公开(公告)号：US11237496B2
公开(公告)日：2022-02-01
申请号：US16649359
申请日：2018-09-27
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu
Abstract: Provided is a toner which provides excellent balance between high temperature storage stability and low temperature fixability and which is less likely to cause the bleeding out of a release agent even in a long-term, high-temperature condition. Disclosed is a toner for developing electrostatic images, comprising: colored resin particles comprising a binder resin, a colorant and a release agent, and an external additive, wherein the colored resin particles further comprise a styrene-based thermoplastic elastomer, and wherein a content of a fatty acid ester compound having a number average molecular weight (Mn) of 500 or more and less than 2,000 as the release agent, is from 2 parts by mass to 20 parts by mass with respect to 100 parts by mass of the binder resin.
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公开(公告)号：US11474443B2
公开(公告)日：2022-10-18
申请号：US17011167
申请日：2020-09-03
Applicant: ZEON CORPORATION
Inventor： Takeru Chiba , Sakyo Yagyu
Abstract: The toner for developing electrostatic images is less likely to cause toner ejection and is excellent in printing durability. The toner includes colored resin particles and external additives. The external additives includes an external additive A and an external additive B; wherein the external additive A is silica particles being surface-hydrophobized with a specific hydrophobizing agent and having a specific number average particle diameter; and wherein the external additive B is silicone resin particles having a ratio (BS/TS) of a BET specific surface area (BS) to a theoretical specific surface area (TS) in a range of from 3.0 to 30.0, and having a specific number average particle diameter.
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公开(公告)号：US20210318633A1
公开(公告)日：2021-10-14
申请号：US17271719
申请日：2019-08-30
Applicant: ZEON CORPORATION
Inventor： Sakyo Yagyu
Abstract: The present invention provides a toner for electrostatic-image development comprising a color resin particle containing a binder resin, a colorant, a charge control agent, and a release agent, and an additive having a polydiene structure, wherein the additive having the polydiene structure has a solubility in styrene at a temperature of 40° C. of 3 to 40 g/100 g, when a cross section of the color resin particle is observed by a transmission electron microscope (TEM), the number of crystal domains of the release agent having an aspect ratio in a range of 2 to 10 in a field of view of 2 μm×2 μm square of the cross section of the color resin particle is 2 to 30.
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公开(公告)号：US10788767B2
公开(公告)日：2020-09-29
申请号：US16311787
申请日：2017-06-26
Applicant: ZEON CORPORATION
Inventor： Takeru Chiba , Sakyo Yagyu
Abstract: Provided is a toner for developing electrostatic images which is less likely to cause toner ejection and is excellent in printing durability. The toner comprises colored resin particles and external additives, wherein the external additives comprise an external additive A and an external additive B; wherein the external additive A is silica particles being surface-hydrophobized with a specific hydrophobizing agent and having a specific number average particle diameter; and wherein the external additive B is silicone resin particles having a ratio (BS/TS) of a BET specific surface area (BS) to a theoretical specific surface area (TS) in a range of from 3.0 to 30.0, and having a specific number average particle diameter.
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