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公开(公告)号：US10955764B2
公开(公告)日：2021-03-23
申请号：US16337515
申请日：2017-09-20
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki , Junichi Takashima
摘要： A toner which is less likely to cause toner leakage and which is less likely to cause aggregation after being left to stand under a high temperature condition. A toner for developing electrostatic images, comprising colored resin particles comprising a binder resin and a colorant, and an external additive, wherein a conditioned bulk density obtained by a powder flowability analyzing device is from 0.525 g/mL to 0.565 g/mL.
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公开(公告)号：US20210311406A1
公开(公告)日：2021-10-07
申请号：US17287592
申请日：2019-10-21
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki
摘要： Provided is toner which has good low-temperature fixability, shelf stability and hot offset resistance, and which suppresses a decrease in glossiness of an image. The toner comprising colored resin particles containing a binder resin, a colorant, a softening agent and a charge control agent, and an external additive, wherein a glass transition temperature (Tg) specified from a temperature dependence curve of a loss tangent (tan δ) obtained by dynamic viscoelastic measurement of the toner, is 50° C. or more and less than 90° C.; the loss tangent (tan δ) at the glass transition temperature (Tg) is 1.70 or less; in a temperature range of 90° C. or more and 160° C. or less, a lowest temperature (Ta) with a loss tangent of 1.50 is more than 95° C. and less than 145° C.; and a storage elastic modulus (G′) at the lowest temperature (Ta) is less than 56000 Pa.
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公开(公告)号：US20190227450A1
公开(公告)日：2019-07-25
申请号：US16337515
申请日：2017-09-20
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki , Junichi Takashima
摘要： A toner which is less likely to cause toner leakage and which is less likely to cause aggregation after being left to stand under a high temperature condition. A toner for developing electrostatic images, comprising colored resin particles comprising a binder resin and a colorant, and an external additive, wherein a conditioned bulk density obtained by a powder flowability analyzing device is from 0.525 g/mL to 0.565 g/mL.
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公开(公告)号：US12061440B2
公开(公告)日：2024-08-13
申请号：US17418941
申请日：2019-12-26
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki , Takeru Chiba , Takashi Iga
CPC分类号： G03G9/081 , G03G9/08755 , G03G9/08795 , G03G9/08797
摘要： The present invention provides a method for producing a toner for electrostatic-image development comprising: a dispersing step of performing a dispersing treatment in which a cavitation effect is obtained on a color resin particle containing a binder resin, a colorant, a charge control agent, and a release agent in an aqueous dispersion medium so as to obtain a dispersion of the color resin particle; and a heating step of performing a heat treatment on the dispersion of the color resin particle at a temperature of equal to or more than a glass transition temperature of the color resin particle and 95° C. or less for a heating time of 5 minutes or more and 10 hours or less.
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公开(公告)号：US20220066336A1
公开(公告)日：2022-03-03
申请号：US17418941
申请日：2019-12-26
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki , Takeru Chiba , Takashi Iga
摘要： The preset invention provides a method for producing a toner for electrostatic-image development comprising: a dispersing step of performing a dispersing treatment in which a cavitation effect is obtained on a color resin particle containing a binder resin, a colorant, a charge control agent, and a release agent in an aqueous dispersion median so as to obtain a dispersion of the color resin particle; and a heating step of performing a heat treatment on the dispersion of the color resin particle at a temperature of equal to or more than a glass transition temperature of the color resin particle and 95° C. or less for a heating time of 5 minutes or more and 10 hours or less.
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公开(公告)号：US20230070797A1
公开(公告)日：2023-03-09
申请号：US17794460
申请日：2021-01-29
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki
摘要： A toner excellent in low-temperature fixing property and shelf stability. The toner comprising colored resin particles containing a binder resin, a colorant, a softening agent and a charge control agent, and an external additive, wherein a glass transition temperature (Tg) specified from a temperature dependence curve for a loss tangent (tan δ) of the toner, which is obtained by a dynamic viscoelastic measurement of the toner at a measurement frequency of 24 Hz, satisfies 45° C.
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公开(公告)号：US20200348610A1
公开(公告)日：2020-11-05
申请号：US16957131
申请日：2018-12-21
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki
摘要： A yellow toner which provides, even in small amounts, a sharper color and brighter gloss, and higher reflection density than ever before, and which has excellent light resistance. The yellow toner contains a binder resin and a yellow colorant, wherein, as the yellow colorant, at least one of the compound A represented by the following general formula (1) and the compound B represented by the following general formula (2), and the compound C represented by the following formula (3) are contained:
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公开(公告)号：US11971684B2
公开(公告)日：2024-04-30
申请号：US17287592
申请日：2019-10-21
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki
CPC分类号： G03G9/08706 , G03G9/08728 , G03G9/09 , G03G9/09741
摘要： Provided is toner which has good low-temperature fixability, shelf stability and hot offset resistance, and which suppresses a decrease in glossiness of an image. The toner comprising colored resin particles containing a binder resin, a colorant, a softening agent and a charge control agent, and an external additive, wherein a glass transition temperature (Tg) specified from a temperature dependence curve of a loss tangent (tan δ) obtained by dynamic viscoelastic measurement of the toner, is 50° C. or more and less than 90° C.; the loss tangent (tan δ) at the glass transition temperature (Tg) is 1.70 or less; in a temperature range of 90° C. or more and 160° C. or less, a lowest temperature (Ta) with a loss tangent of 1.50 is more than 95° C. and less than 145° C.; and a storage elastic modulus (G′) at the lowest temperature (Ta) is less than 56000 Pa.
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公开(公告)号：US11126101B2
公开(公告)日：2021-09-21
申请号：US16957131
申请日：2018-12-21
申请人： ZEON CORPORATION
发明人： Kojiro Akazaki
摘要： A yellow toner which provides, even in small amounts, a sharper color and brighter gloss, and higher reflection density than ever before, and which has excellent light resistance. The yellow toner contains a binder resin and a yellow colorant, wherein, as the yellow colorant, at least one of the compound A represented by the following general formula (1) and the compound B represented by the following general formula (2), and the compound C represented by the following formula (3) are contained:
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