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公开(公告)号：US12078960B2
公开(公告)日：2024-09-03
申请号：US17493309
申请日：2021-10-04
IPC分类号： G03G9/087 , C08F220/18 , C08F220/46 , C08G63/183 , G03G9/08
CPC分类号： G03G9/08731 , C08F220/1818 , C08F220/46 , C08G63/183 , G03G9/081 , G03G9/0815 , G03G9/0819 , G03G9/0821 , G03G9/08755
摘要： A toner including toner particles having a resin component containing a crystalline resin and an amorphous resin, in which the resin component contains a tetrahydrofuran-insoluble component, and the content of the tetrahydrofuran-insoluble component with respect to the content of the resin component is 5.0% to 80.0% by mass, wherein a maximum endothermic peak temperature of the tetrahydrofuran-insoluble component is 55.0 to 80.0° C., and the amount of heat absorption in the maximum endothermic peak of the tetrahydrofuran-insoluble component is 10.0 to 80.0 J/g, and toner particles have a structure which comprises a matrix containing the crystalline resin and domains containing the amorphous resin.
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公开(公告)号：US11809132B2
公开(公告)日：2023-11-07
申请号：US17197102
申请日：2021-03-10
发明人： Yuujirou Nagashima , Yasuhiro Hashimoto , Koji Nishikawa , Tomoya Nagaoka , Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
CPC分类号： G03G9/09775 , C08F220/1818 , C08G77/04 , G03G9/0819 , G03G9/0821 , G03G9/08711
摘要： A toner is provided, which has a toner particle that contains a binder resin, and organosilicon polymer particle on a surface of the toner particle. A methanol concentration a (vol %) of the organosilicon polymer particle in a wettability test and a methanol concentration b (vol %) of the toner particle in a wettability test satisfy Expression (I) below:
|a−b|≤25 (I), and
an adhesion index of the organosilicon polymer particle on a polycarbonate film, calculated on the basis of Expression (II) below, is not more than 3.5:
Adhesion index=area ratio c of the organosilicon polymer particle having migrated to the polycarbonate film/coverage ratio d of the organosilicon polymer particle on the surface of the toner particle×100 (II).-
公开(公告)号：US11112713B2
公开(公告)日：2021-09-07
申请号：US16802814
申请日：2020-02-27
发明人： Hiroki Akiyama , Shuhei Moribe , Hiroyuki Tomono , Tatsuya Saeki , Hiroki Kagawa , Atsuhiko Ohmori , Katsuhisa Yamazaki
IPC分类号： G03G9/087
摘要： A toner including a toner particle containing a binder resin, wherein the binder resin contains a crystalline resin, and in viscoelasticity measurement of the toner with Tp being a peak temperature of an endothermic peak derived from the crystalline resin in DSC of the toner, given G′(Tp−5, 0.01 Hz) as a storage modulus at a temperature of Tp−5° C. and a frequency of 0.01 Hz, G′(Tp−5, 10 Hz) as a storage modulus at a temperature of Tp−5° C. and a frequency of 10 Hz, and G′(Tp−30, 10 Hz) as a storage modulus at a temperature of Tp−30° C. and a frequency of 10 Hz, the following formulae are satisfied: G′(Tp−30,10 Hz)/G′(Tp−5,0.01 Hz)≤1.40 G′(Tp−5,10 Hz)/G′(Tp−5,0.01 Hz)≤2.20.
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公开(公告)号：US20210055667A1
公开(公告)日：2021-02-25
申请号：US16987902
申请日：2020-08-07
发明人： Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
IPC分类号： G03G9/087
摘要： A toner comprising a resin that contains an amorphous segment and a crystalline segment as a binder resin, wherein a proportion of a tetrahydrofuran-insoluble matter of a resin component is from 40% by mass to 80% by mass; in differential scanning calorimeter measurement of the tetrahydrofuran-insoluble matter, where a temperature of a maximum endothermic peak is denoted by Tm [° C.] and an endothermic quantity is denoted by H(I) [J/g], the following formulas (1) and (2) are satisfied: 55.0≤Tm≤80.0 (1) 10.0≤H(I)≤80.0 (2).
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公开(公告)号：US11796930B2
公开(公告)日：2023-10-24
申请号：US17168523
申请日：2021-02-05
发明人： Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
CPC分类号： G03G9/0837 , G03G9/0832 , G03G9/0836 , G03G9/08755
摘要： A magnetic toner comprising a magnetic toner particle including a binder resin, a magnetic body and a crystalline polyester, wherein in cross-sectional observation of the magnetic toner particle using a transmission electron microscope, a variation coefficient CV3 of an occupied area ratio of the magnetic body when a cross section of the magnetic toner particle is divided by a square grid having a side of 0.8 μm is from 40.0% to 80.0%, and assuming that a storage elastic modulus at 40° C. is taken as E′(40) [Pa] and a storage elastic modulus at 85° C. is taken as E′(85) [Pa], the storage elastic moduli being obtained in a powder dynamic viscoelasticity measurement of the magnetic toner, the following formulas (1) and (2) are satisfied.
E′(85)≤2.0×109 (1)
[E′(40)−E′(85)]×100/E′(40)≥70 (2)-
公开(公告)号：US20220373906A1
公开(公告)日：2022-11-24
申请号：US17660146
申请日：2022-04-21
发明人： Atsuhiko Ohmori , Hiroki Kagawa , Keisuke Adachi , Tomoko Sugita
摘要： A toner comprising: a toner particle comprising a binder resin and a hydrocarbon wax; and inorganic fine particles, wherein the inorganic fine particles include silica fine particles surface-treated with specific polydimethylsiloxanes, a total amount of trimethylsilanol in the silica fine particles is from 1.0 ppm to 5.0 ppm, where a standard value of an amount of ions of an ester group is measured by time-of-flight secondary ion mass spectrometry, one or more peaks of the standard value are present within a range of 100 nm from the surface of the toner particle, and the maximum value A(d max) among the peaks of the standard value and the standard value A(0) on the surface of the toner particle satisfy the following relationships: 1.05≤A(d max)/A(0)≤5.00, A(0)≥0.010.
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公开(公告)号：US11415902B2
公开(公告)日：2022-08-16
申请号：US16987902
申请日：2020-08-07
发明人： Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
IPC分类号： G03G9/087
摘要： A toner comprising a resin that contains an amorphous segment and a crystalline segment as a binder resin, wherein a proportion of a tetrahydrofuran-insoluble matter of a resin component is from 40% by mass to 80% by mass; in differential scanning calorimeter measurement of the tetrahydrofuran-insoluble matter, where a temperature of a maximum endothermic peak is denoted by Tm [° C.] and an endothermic quantity is denoted by H(I) [J/g], the following formulas (1) and (2) are satisfied: 55.0≤Tm≤80.0 (1) 10.0≤H(I)≤80.0 (2).
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公开(公告)号：US11112709B2
公开(公告)日：2021-09-07
申请号：US16438623
申请日：2019-06-12
IPC分类号： G03G9/087
摘要： A toner comprising a toner particle containing a binder resin, the storage elastic modulus Gt′ (150) of the toner at 150° C. is at least 1.0×104 Pa, the binder resin contains a polymer A having a first monomer unit derived from a first polymerizable monomer and a second monomer unit derived from a second polymerizable monomer different from the first polymerizable monomer, the first polymerizable monomer is selected from specific (meth)acrylic acid esters, the contents of the first monomer unit and second monomer unit in the polymer A are within specific ranges, and the SP values of the first monomer unit and second monomer unit are within specific ranges.
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公开(公告)号：US20190384192A1
公开(公告)日：2019-12-19
申请号：US16438611
申请日：2019-06-12
IPC分类号： G03G9/083 , G03G9/107 , G03G9/087 , G03G9/08 , C08F220/68 , C08F220/46 , C08F212/10 , G03G9/113
摘要： Provided is a magnetic toner having a toner particle containing a binder resin and a magnetic body, wherein the binder resin contains a polymer A having a first monomer unit and a second monomer unit, the first polymerizable monomer is at least one selected from the group consisting of the (meth)acrylic acid esters having C18-36 alkyl groups, a content of the first monomer unit and a content of the second monomer unit based on the total moles of all monomer units in the polymer A are respectively 5.0 to 60.0 mol % and 20.0 to 95.0 mol %, and assuming that an SP value of the first monomer unit and the second monomer unit are taken as SP11 (J/cm3)0.5 and SP21(J/cm3)0.5, respectively, 3.00≤(SP21−SP11)≤25.00 is satisfied, and an oil absorption of the magnetic body is 5 to 40 ml/100 g.
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公开(公告)号：US20210302856A1
公开(公告)日：2021-09-30
申请号：US17197102
申请日：2021-03-10
发明人： Yuujirou Nagashima , Yasuhiro Hashimoto , Koji Nishikawa , Tomoya Nagaoka , Shuntaro Watanabe , Hiroki Akiyama , Hiroki Kagawa
IPC分类号： G03G9/097 , G03G9/08 , C08F220/18 , G03G9/087 , C08G77/04
摘要： A toner is provided, which has a toner particle that contains a binder resin, and organosilicon polymer particle on a surface of the toner particle. A methanol concentration a (vol %) of the organosilicon polymer particle in a wettability test and a methanol concentration b (vol %) of the toner particle in a wettability test satisfy Expression (I) below: |a−b|≤25 (I), and an adhesion index of the organosilicon polymer particle on a polycarbonate film, calculated on the basis of Expression (II) below, is not more than 3.5: Adhesion index=area ratio c of the organosilicon polymer particle having migrated to the polycarbonate film/coverage ratio d of the organosilicon polymer particle on the surface of the toner particle ×·100 (II)
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