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公开(公告)号：US20220011686A1
公开(公告)日：2022-01-13
申请号：US17371222
申请日：2021-07-09
Applicant: Konica Minolta, Inc.
Inventor： Takanari KAYAMORI , Yuya KUBO , Shiro HIRANO
Abstract: The toner for developing an electrostatic charge image of the present invention contains a toner base particle comprising a binder resin and at least two kinds of organic pigments, and strontium titanate as an external additive.
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公开(公告)号：US20220350269A1
公开(公告)日：2022-11-03
申请号：US17726159
申请日：2022-04-21
Applicant: Konica Minolta, Inc.
Inventor： Yuya KUBO , Takanari KAYAMORI , Naoya TONEGAWA , Noboru UEDA
Abstract: Disclosed is an electrostatic charge image developing toner including: toner base particles containing at least a binder resin and a magnetic material; and an external additive, wherein the binder resin contains a crystalline resin; and the external additive contains strontium titanate particles doped with metal elements other than titanium and strontium.
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公开(公告)号：US20220011687A1
公开(公告)日：2022-01-13
申请号：US17371238
申请日：2021-07-09
Applicant: Konica Minolta, Inc.
Inventor： Shiro HIRANO , Takanari KAYAMORI , Yuya KUBO
Abstract: The toner for developing an electrostatic charge image of the present invention contains a toner base particle comprising a binder resin and at least two kinds of organic pigments, and alumina as an external additive. The at least two kinds of organic pigments comprises: a pigment P1 having an absorption maximum wavelength λmax (nm) of greater than 400 nm and less than 600 nm when dispersed in methyl ethyl ketone; and a pigment P2 having an absorption maximum wavelength λ max (nm) of 600 nm or more and 700 nm or less when dispersed in methyl ethyl ketone.
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公开(公告)号：US20220011685A1
公开(公告)日：2022-01-13
申请号：US17371228
申请日：2021-07-09
Applicant: Konica Minolta, Inc.
Inventor： Yuya KUBO , Takanari KAYAMORI , Noboru UEDA
Abstract: The toner for developing an electrostatic charge image of the present invention contains a toner base particle comprising a binder resin, at least two kinds of organic pigments and carbon black, and strontium titanate as an external additive.
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Patent Agency Ranking
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：US20220397837A1
公开(公告)日：2022-12-15
申请号：US17825149
申请日：2022-05-26
Applicant: Konica Minolta, Inc.
Inventor： Takanari KAYAMORI , Yuya KUBO
Abstract: A two-component developer includes an electrostatic image developing toner and a carrier, and the electrostatic image developing toner contains toner particles having toner base particles and an external additive. The toner base particles contain a colorant, the colorant contains a pigment P1 and a pigment P2, the absorption maximum wavelength λmax of the pigments P1 and P2 each in dispersion in methyl ethyl ketone is, 400 nm or more and less than 600 nm for the pigment P1 and 600 nm or more and 700 nm or less for the pigment P2, the external additive contains titanium oxide, the content of the titanium oxide is 0.01% by mass or more and less than 1.00% by mass based on the total mass of the toner base particles, and the iron element content (atomic %) of the surface of the carrier as measured by X-ray electron spectroscopy satisfies a specific expression.
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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：US20200081362A1
公开(公告)日：2020-03-12
申请号：US16552399
申请日：2019-08-27
Applicant: Konica Minolta, Inc.
Inventor： Miyuki YAMADA , Takanari KAYAMORI
Abstract: A toner for developing electrostatic images includes at least a binder resin and a colorant containing a copper phthalocyanine compound, wherein in X-ray diffraction using a CuKα ray, the toner has peaks at a Bragg angle of 2θ=7.0±0.1° and at a Bragg angle of 2θ=9.1±0.2° and additionally has a peak between the two peaks.
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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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