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公开(公告)号：US20200150551A1
公开(公告)日：2020-05-14
申请号：US16590712
申请日：2019-10-02
Applicant: Konica Minolta, Inc.
Inventor： Takanari KAYAMORI , Masaharu MATSUBARA , Naoya TONEGAWA , Atsushi IIOKA
Abstract: An electrostatic image developing toner includes toner base particles, wherein the toner base particles contain: an amorphous polyester resin; a crystalline resin; and o-acetoacetaniside, and the content of the o-acetoacetaniside in the toner base particles is 0.1 ppm by mass or more and 200 ppm by mass or less.
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公开(公告)号：US20160313661A1
公开(公告)日：2016-10-27
申请号：US15087210
申请日：2016-03-31
Applicant: Konica Minolta, Inc.
Inventor： Kouji SEKIGUCHI , Shiro HIRANO , Naoya TONEGAWA , Masaharu MATSUBARA , Atsushi IIOKA
CPC classification number: G03G9/09733 , G03G9/08711
Abstract: A particulate toner for developing electrostatically charged image includes a binder resin, a colorant, a mold release agent and a plasticizer. The binder resin comprises a styrene-acrylic resin. A relationship represented by Expression Ac
Abstract translation: 用于显影静电荷图像的微粒调色剂包括粘合剂树脂，着色剂，脱模剂和增塑剂。 粘合剂树脂包括苯乙烯 - 丙烯酸树脂。 由表达式Ac
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公开(公告)号：US20180284631A1
公开(公告)日：2018-10-04
申请号：US15934472
申请日：2018-03-23
Applicant: Konica Minolta, Inc.
Inventor： Takanari KAYAMORI , Masaharu MATSUBARA , Naoya TONEGAWA , Kouji IZAWA , Atsushi IIOKA
CPC classification number: G03G9/0924 , G03G9/08755 , G03G9/091 , G03G9/092
Abstract: To provide a magenta toner for electrostatic charge image development including a crystalline polyester resin and an amorphous resin as a binder resin, which is a means for improving low temperature fixability, scattering properties, GI value, saturation, and light fastness.A magenta toner for electrostatic charge image development including an amorphous resin and a crystalline polyester resin as a binder resin, wherein predetermined quinacridone-based pigment, metal element-containing monoazo pigment, and naphthol AS-based pigment are included as a coloring agent, and the combined content of the quinacridone-based pigment and the metal element-containing monoazo pigment is 50-90% by mass of the total coloring agent.
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公开(公告)号：US20170255119A1
公开(公告)日：2017-09-07
申请号：US15440167
申请日：2017-02-23
Applicant: Konica Minolta, Inc.
Inventor： Atsushi IIOKA , Takanari Kayamori , Naoya Tonegawa , Masaharu Matsubara , Kouji Sekiguchi
CPC classification number: G03G9/09364 , G03G9/0819 , G03G9/0825 , G03G9/0827 , G03G9/09314 , G03G9/09321 , G03G9/09328 , G03G9/09357 , G03G9/09392
Abstract: An electrostatic charge image developing toner includes a toner matrix particle having a core-shell structure. The toner matrix particle contains: a core particle including an amorphous resin, a colorant, a release agent, and a crystalline resin; and a shell layer coating a surface of the core particle at a coverage of 60 to 99%. The shell layer includes an amorphous resin. The amorphous resin contained in the core particle differs from the amorphous resin contained in the shell layer. The toner matrix particle has one to seven discrete shell domains determined by observation of a cross section of the toner matrix particle with an electron microscope.
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Patent Agency Ranking
5.发明申请公开(公告)号：US20250036037A1
公开(公告)日：2025-01-30
申请号：US18776488
申请日：2024-07-18
Applicant: Konica Minolta, Inc.
Inventor： Shiori TSUDA , Atsushi IIOKA , Kazuya ISOBE , Yukiko NAKAI , Genki WATANABE
Abstract: A toner for developing an electrostatic charge image, the toner including a binder resin in a toner base particle, in which the binder resin includes a polymer having a constituent unit represented by the following general formula (1) and a constituent unit represented by the following general formula (2): where, R1 represents a hydrogen atom or a methyl group, and R2 represents a hydrocarbon group having 6 or more and 12 or less carbon atoms and having an alicyclic structure, and where, R3 represents a hydrogen atom or a methyl group, and R4 represents a linear or branched hydrocarbon group having 8 or more and 18 or less carbon atoms.
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6.发明申请ELECTROPHOTOGRAPHIC IMAGE FORMING METHOD AND FULL COLOR TONER SET FOR DEVELOPING ELECTROSTATIC IMAGE 有权电子图像形成方法和全彩色调色剂设置用于开发静电图像公开(公告)号：US20170045835A1
公开(公告)日：2017-02-16
申请号：US15209866
申请日：2016-07-14
Applicant: Konica Minolta, Inc.
Inventor： Shiro HIRANO , Naoya TONEGAWA , Masaharu MATSUBARA , Kouji SEKIGUCHI , Atsushi IIOKA
IPC: G03G9/00
CPC classification number: G03G9/092 , G03G9/08711 , G03G9/08755 , G03G9/08786 , G03G9/08797 , G03G9/0904 , G03G9/091 , G03G9/0918 , G03G15/0121
Abstract: Provided is a method of forming an electrophotographic image using a plurality of color toners, the method containing: a charging step; an exposing step; a developing step; and a transferring step, wherein the plurality of color toners each respectively contain toner particles including a binder resin, a coloring agent, a releasing agent, and a crystalline resin; the binder resin contains an amorphous vinyl polymer formed with a vinyl monomer; the toner particles contain the amorphous vinyl polymer in the range of 10 to 90 mass %; and a maximum value of an acid value difference of the color toners is in the range of 1 to 10 mg KOH/g.
Abstract translation: 提供了使用多种彩色调色剂形成电子照相图像的方法，该方法包括：充电步骤; 曝光步骤 发展步骤; 和转印步骤，其中多个彩色调色剂各自分别含有包含粘合剂树脂，着色剂，脱模剂和结晶树脂的调色剂颗粒; 粘合剂树脂含有由乙烯基单体形成的无定形乙烯基聚合物; 调色剂颗粒含有10至90质量％范围内的无定形乙烯基聚合物; 并且彩色调色剂的酸值差的最大值在1至10mg KOH / g的范围内。
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公开(公告)号：US20250130514A1
公开(公告)日：2025-04-24
申请号：US18919597
申请日：2024-10-18
Applicant: KONICA MINOLTA, INC.
Inventor： Atsushi IIOKA , Kazuya ISOBE , Yukiko NAKAI , Shiori TSUDA , Genki WATANABE
IPC: G03G9/087
Abstract: Disclosed is an electrostatic charge image developing toner including a toner base particle containing a binder resin and a colorant. The electrostatic charge image developing toner contains, as the binder resin, a polymer having at least a structural unit represented by a general formula (1), and a concentration of radiocarbon isotope 14C is 21.5 pMC or more, and in the general formula (1), R1 represents a hydrogen atom or a methyl group, and R2 represents an alicyclic hydrocarbon group having 6 to 12 carbon atoms.
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公开(公告)号：US20230350318A1
公开(公告)日：2023-11-02
申请号：US18299138
申请日：2023-04-12
Applicant: Konica Minolta, Inc.
Inventor： Keiji ARAI , Kentarou MOGI , Atsushi IIOKA , Minori MOMMA
CPC classification number: G03G9/0825 , G03G5/0217 , G03G9/0827 , G03G9/08755 , G03G9/0975
Abstract: An image forming system uses: an organic photoreceptor; and a toner for electrostatic charge image development containing toner particles, wherein the organic photoreceptor has a protective layer containing a cured resin; the toner particle has a form in which at least one type of lubricant particle and at least one type of non-lubricant particle are contained or adhered on a surface of a plurality of convex portions or on a surface between the plurality of convex portions, of a toner base particle having the plurality of convex portions thereon; and an average spacing D1 of the convex portions on the surface of the toner base particle, a median diameter D2 of the lubricant particle having the smallest median diameter, and a median diameter D3 of the non-lubricant particle having the largest median diameter, satisfy the relationship of the following formula (1): Formula (1) D3≤D1≤D2.
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公开(公告)号：US20180088481A1
公开(公告)日：2018-03-29
申请号：US15710327
申请日：2017-09-20
Applicant: Konica Minolta, Inc.
Inventor： Takanari KAYAMORI , Masaharu MATSUBARA , Naoya TONEGAWA , Kouji IZAWA , Atsushi IIOKA
CPC classification number: G03G9/09716 , G03G9/0806 , G03G9/0819 , G03G9/0823 , G03G9/0827 , G03G9/0832 , G03G9/0833 , G03G9/08722 , G03G9/08755 , G03G9/08782 , G03G9/0902 , G03G9/0926 , G03G9/09725
Abstract: An electrostatic charge image developing white toner according to the present invention includes toner base particles including rutile type titanium oxide particles as colorant and a binder resin. The rutile type titanium oxide particles are composed of two groups Ga and Gb of rutile type titanium oxide particles have different volume particle size distribution. A volume particle size distribution curve of the rutile type titanium oxide particles represents diameter on a horizontal axis and volume ratio on a vertical axis and has two main peaks. Diameters Da and Db of peak top positions of the two main peaks are respectively within a range of 100 to 500 nm, and satisfy following Relational expressions: 25 nm≦Db−Da≦200 nm (Relational expression 1): (mass of Ga):(mass of Gb)=5:95 to 30:70 (Relational expression 2):
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