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公开(公告)号：US11886144B2
公开(公告)日：2024-01-30
申请号：US16979394
申请日：2019-02-21
Applicant: KAO CORPORATION
Inventor： Motomu Shibata , Shoichi Murata
CPC classification number: G03G9/08788 , C08G81/00 , C08L87/005 , G03G9/08711 , G03G9/08755 , G03G9/08797
Abstract: Provided are a binder resin composition for toner excellent in low-temperature fusing property, storage stability and durability, a toner for developing electrostatic images that contains the binder resin composition for toner, and a method for producing the binder resin composition for toner. The binder resin composition for toner contains a resin composition (C-P) prepared by condensing an acid group-having crystalline resin (C) and a polyalkyleneimine, and an amorphous resin (A).
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公开(公告)号：US10331053B2
公开(公告)日：2019-06-25
申请号：US15542583
申请日：2016-01-14
Applicant: KAO CORPORATION
Inventor： Shoichi Murata , Hiroto Hayashi
Abstract: The present invention relates to a process for producing a toner for development of electrostatic images, including step (1): subjecting a polyhydric alcohol component and a polycarboxylic acid component to polycondensation reaction in the presence of a hydroxy group- or carboxy group-containing hydrocarbon wax (W1) to obtain a non-crystalline resin (A) containing a constitutional component derived from the hydrocarbon wax (W1) and also containing a polyester moiety; step (2): dispersing the non-crystalline resin (A) obtained in the step (1) in an aqueous medium to obtain an aqueous dispersion of resin particles (X); step (3): aggregating the resin particles (X) obtained in the step (2) in an aqueous medium in the presence of a crystalline polyester (B) to obtain aggregated particles; and step (4): coalescing the aggregated particles obtained in the step (3).
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公开(公告)号：US20130273470A1
公开(公告)日：2013-10-17
申请号：US13827967
申请日：2013-03-14
Applicant: KAO CORPORATION
Inventor： Norihiro Fukuri , Osamu Yamashita , Hiroki Kubo , Shoichi Murata , Takahiro Yoshikawa
IPC: G03G9/087
CPC classification number: G03G9/08755 , G03G9/09328 , G03G9/09371 , G03G9/09392
Abstract: The present invention relates to a toner for electrophotography including core-shell particles as a resin binder each including a core portion containing an amorphous resin (A) having a softening point of 105° C. or lower which is obtained by polycondensing a carboxylic acid component containing an alkenyl succinic acid with an alcohol component; and a shell portion containing an amorphous resin (B) obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component containing a trivalent or higher-valent polycarboxylic acid compound in an amount of 20 mol % or less. The toner for electrophotography according to the present invention is excellent in heat resistant storage property, low-temperature fusing property and durability.
Abstract translation: 本发明涉及一种电子照相用调色剂，其包括作为树脂粘合剂的核 - 壳颗粒，每个核 - 壳颗粒包含含有软化点为105℃或更低的无定形树脂（A）的核心部分，其通过使羧酸组分 含有烯醇琥珀酸与醇组分; 和含有通过将含有2〜6个碳原子的脂肪族二醇的醇成分与含有20摩尔％以上的3价以上的多元羧酸化合物的羧酸成分缩聚得到的无定形树脂（B）的壳部，或 减。 本发明的电子照相用调色剂具有优异的耐热储存性，低温熔融性和耐久性。
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4.发明授权Method for producing resin particle dispersion, and method for producing toner for electrostatic charge image development use 有权树脂粒子分散体的制造方法以及静电荷成像用调色剂的制造方法公开(公告)号：US09557667B2
公开(公告)日：2017-01-31
申请号：US14760886
申请日：2014-01-14
Applicant: KAO CORPORATION
Inventor： Takahiro Yoshikawa , Shoichi Murata
CPC classification number: G03G9/0806 , C08J3/05 , C08J3/16 , C08J2367/02 , G03G9/087 , G03G9/08755
Abstract: The present invention relates to a process for producing a resin particle dispersion, including a step (1) of mixing a polyester resin and a basic aqueous solution to obtain a resin neutralized product; and a step (2) of adding an aqueous medium to the resin neutralized product obtained in the step (1) to emulsify the resin neutralized product, in which a concentration of an ester group in the polyester resin is from 6.3 to 12 mmol/g, a pH of the basic aqueous solution as measured at 25° C. is from 8.5 to 13.5, and a content of an organic solvent in the resin neutralized product is not more than 10% by mass; and a process for producing a toner for development of electrostatic images, including steps of aggregating and coalescing the resin particles in the obtained resin particle dispersion. The present invention provides a process for producing a dispersion of resin particles having a small particle size and a narrow particle size distribution, and a process for producing a toner that has a narrow particle size distribution and is excellent in dot reproducibility and charge stability.
Abstract translation: 本发明涉及一种树脂颗粒分散体的制造方法，其包括将聚酯树脂和碱性水溶液混合以获得树脂中和产物的步骤（1） 和向上述工序（1）得到的树脂中和物中添加水性介质的步骤（2），使聚酯树脂中的酯基浓度为6.3〜12mmol / g的树脂中和物乳化 在25℃下测定的碱性水溶液的pH为8.5〜13.5，树脂中和物中的有机溶剂的含量为10质量％以下。 以及用于生产用于静电图像显影的调色剂的方法，包括在所获得的树脂颗粒分散体中聚集和聚结树脂颗粒的步骤。 本发明提供一种制造粒径小，粒度分布窄的树脂粒子的分散液的制造方法以及粒径分布窄，点重现性和电荷稳定性优异的调色剂的制造方法。
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Patent Agency Ranking
公开(公告)号：US11841678B2
公开(公告)日：2023-12-12
申请号：US16967324
申请日：2019-02-08
Applicant: KAO CORPORATION
Inventor： Shoichi Murata , Manabu Suzuki , Yuki Wakabayashi
CPC classification number: G03G9/0804 , G03G9/0819 , G03G9/08755 , G03G9/08782 , G03G9/0904 , G03G15/08
Abstract: A method for producing a toner, including aggregating and coalescing resin particles and colorant particles in an aqueous medium. The resin particles contain, in the same or different particles, an amorphous polyester-based resin which is a polycondensate of an alcohol component containing an aromatic alcohol and a carboxylic acid component, and a crystalline polyester resin. The colorant particles contain a colorant and an addition polymer of a raw material monomer containing an addition-polymerizing monomer having an aromatic group. A ratio by mass of the colorant to the addition polymer in the colorant particles is 50/50 or more and 95/5 or less.
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公开(公告)号：US11768446B2
公开(公告)日：2023-09-26
申请号：US16967274
申请日：2019-02-08
Applicant: KAO CORPORATION
Inventor： Shoichi Murata , Manabu Suzuki , Yuki Wakabayashi
CPC classification number: G03G9/0804 , G03G9/0819 , G03G9/0827 , G03G9/08711 , G03G9/08755 , G03G9/0904
Abstract: A method for producing a toner, including aggregating and coalescing resin particles and colorant particles. The resin particles contain a composite resin containing a polyester resin segment, an addition polymer resin segment which is an addition polymerized product of a raw material monomer containing a styrenic compound, and a structural unit derived from a bireactive monomer bonding to the polyester resin segment and the addition polymer resin segment via a covalent bond. The colorant particles contain a colorant and an addition polymer of a raw material monomer containing a styrenic compound. The addition polymer contains a structural unit derived from the styrenic compound in the main chain. A ratio by mass of the colorant to the addition polymer in the colorant particles is 50/50 or more and 95/5 or less.
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公开(公告)号：US10394149B2
公开(公告)日：2019-08-27
申请号：US15572687
申请日：2016-05-18
Applicant: Kao Corporation
Inventor： Tomohide Yoshida , Shoichi Murata , Manabu Suzuki , Eiji Shirai
Abstract: The present invention provides a toner for development of electrostatic images including a polyester-based resin and a polypropylene-based wax, which is excellent in fusing properties on a polypropylene film. The present invention relates to [1] a resin binder composition for toners for development of electrostatic images which has an endothermic amount ratio ΔHCW/W of not less than 0.10 and not more than 0.80, [2] a resin binder composition for toners for development of electrostatic images in which a volume-median particle size (D50) of a wax as a whole contained therein is not less than 1 μm and not more than 50 μm; a volume-median particle size (D50) of a small particle size component of the wax is not less than 20 nm and not more than 400 nm; and a content of the small particle size component in the wax is not less than 20% by mass and not more than 90% by mass, [3] a process for producing a resin binder composition for toners for development of electrostatic images in which a polypropylene-based wax is added to a reaction system prior to addition polymerization upon production of a composite resin as a resin binder; and [4] a toner for development of electrostatic images including the resin binder composition as described in the above [1] or [2].
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公开(公告)号：US10078278B2
公开(公告)日：2018-09-18
申请号：US15315117
申请日：2015-06-10
Applicant: KAO CORPORATION
Inventor： Shoichi Murata , Tomohide Yoshida , Hiroto Hayashi , Motomu Shibata
CPC classification number: G03G9/0806 , G03G9/0804 , G03G9/08708 , G03G9/08711 , G03G9/08755 , G03G9/08782 , G03G9/08786 , G03G9/08788 , G03G9/08795 , G03G9/08797 , G03G9/0918 , G03G9/09328 , G03G9/09364 , G03G9/09371 , G03G9/09378 , G03G9/09392
Abstract: The present invention relates to a process for producing a toner for development of electrostatic images, including the following steps (1) to (3): Step (1): aggregating resin particles (X) containing a composite resin that contains a segment constituted of a polyester resin (a) obtained by polycondensing an alcohol component containing 80 mol % or more of a propyleneoxide adduct of bisphenol A and a polycarboxylic acid component, and a vinyl-based resin segment containing a constitutional unit derived from a styrene-based compound, in an aqueous medium, to obtain aggregated particles (1); Step (2): aggregating the aggregated particles (1) obtained in the step (1) with resin particles (Y) containing a polyester resin (b) obtained by polycondensing an alcohol component containing 80 mol % or more of an ethyleneoxide adduct of bisphenol A and a polycarboxylic acid component to obtain aggregated particles (2); and Step (3): coalescing the aggregated particles (2) obtained in the step (2).
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公开(公告)号：US09128399B2
公开(公告)日：2015-09-08
申请号：US13827967
申请日：2013-03-14
Applicant: KAO CORPORATION
Inventor： Norihiro Fukuri , Osamu Yamashita , Hiroki Kubo , Shoichi Murata , Takahiro Yoshikawa
CPC classification number: G03G9/08755 , G03G9/09328 , G03G9/09371 , G03G9/09392
Abstract: The present invention relates to a toner for electrophotography including core-shell particles as a resin binder each including a core portion containing an amorphous resin (A) having a softening point of 105° C. or lower which is obtained by polycondensing a carboxylic acid component containing an alkenyl succinic acid with an alcohol component; and a shell portion containing an amorphous resin (B) obtained by polycondensing an alcohol component containing an aliphatic diol having 2 to 6 carbon atoms with a carboxylic acid component containing a trivalent or higher-valent polycarboxylic acid compound in an amount of 20 mol % or less. The toner for electrophotography according to the present invention is excellent in heat resistant storage property, low-temperature fusing property and durability.
Abstract translation: 本发明涉及一种电子照相用调色剂，其包括作为树脂粘合剂的核 - 壳颗粒，每个核 - 壳颗粒包含含有软化点为105℃或更低的无定形树脂（A）的核心部分，其通过使羧酸组分 含有烯醇琥珀酸与醇组分; 和含有通过将含有2〜6个碳原子的脂肪族二醇的醇成分与含有20摩尔％以上的3价以上的多元羧酸化合物的羧酸成分缩聚得到的无定形树脂（B）的壳部，或 减。 本发明的电子照相用调色剂具有优异的耐热储存性，低温熔融性和耐久性。
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