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1.发明申请公开(公告)号：US20210063905A1
公开(公告)日：2021-03-04
申请号：US16993352
申请日：2020-08-14
Applicant: Konica Minolta, Inc.
Inventor： Takaki KAWAMURA , Noboru UEDA , Natsuki ITO , Yusuke TAKIGAURA , Ami MOTOHASHI
Abstract: An electrostatic latent image developing toner set of the present invention is an electrostatic latent image developing toner set including at least a yellow toner, a magenta toner, and a cyan toner, wherein when exothermic peak top temperatures during decreasing temperature in differential scanning calorimetry of the yellow toner, the magenta toner, and the cyan toner are assumed to be P(Y), P(M), and P(C), respectively, the exothermic peak top temperatures satisfy the following expression (1). 70≤P(Y)≤P(M)≤P(C)≤90(° C.) (1)
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公开(公告)号：US20170371256A1
公开(公告)日：2017-12-28
申请号：US15623600
申请日：2017-06-15
Applicant: Konica Minolta, Inc.
Inventor： Aya SHIRAI , Kouji SUGAMA , Shiro HIRANO , Noboru UEDA
CPC classification number: G03G9/08782 , G03G9/0821 , G03G9/0827 , G03G9/08711 , G03G9/08755 , G03G9/08784 , G03G9/08795 , G03G9/08797
Abstract: An object of the present invention is to provide an electrostatic latent image developing toner containing: a binder resin; and a releasing agent, wherein the binder resin contains a crystalline polyester resin; an endothermic peak top temperature of the electrostatic latent image developing toner is 70° C. or more measured with differential scanning calorimetry (DSC) in a heating-up period of the toner; and a heat value ΔHc(L) is 15% or less with respect to a heat value ΔHc, wherein the heat value ΔHc(L) is a heat value in the range of (an exothermic peak top temperature rc−7° C.) or less; and the heat value ΔHc is a heat value of the total exothermic peak measured with DSC in a heating-down period of the toner.
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公开(公告)号：US20160109819A1
公开(公告)日：2016-04-21
申请号：US14883214
申请日：2015-10-14
Applicant: Konica Minolta, Inc.
Inventor： Hiroshi NAGASAWA , Noboru UEDA , Kouji SUGAMA , Anju HORI , Keisuke ASANO
CPC classification number: G03G9/08755 , G03G9/0821
Abstract: An electrostatic image developing toner includes toner particles that contain a binder resin and a coloring agent. The binder resin includes an amorphous resin and a crystalline polyester resin. The toner satisfies Relations (1) and (2). ΔH1 is the amount of heat absorption based on a melting peak of the crystalline polyester resin in a first heating step from room temperature to 150° C. ΔH2 is the amount of heat absorption based on a melting peak of the crystalline polyester resin in a second heating step from 0° C. to 150° C. ΔH(theo.) is a value of fusion enthalpy calculated from a mass ratio of a structural unit derived from a linear aliphatic monomer contained in the binder resin based on a group contribution method. 0.2≦ΔH1/ΔH(theo.)≦0.5 Relation (1): 0.1≦ΔH2/ΔH(theo.)≦0.3 Relation (2):
Abstract translation: 静电图像显影调色剂包括含有粘合剂树脂和着色剂的调色剂颗粒。 粘合剂树脂包括无定形树脂和结晶聚酯树脂。 调色剂满足关系（1）和（2）。 ＆Dgr; H1是在从室温至150℃的第一加热步骤中基于结晶聚酯树脂的熔融峰的吸热量。＆Dgr; H 2是基于结晶聚酯的熔融峰的吸热量 树脂在0℃至150℃的第二加热步骤中。H（theo。）是由源自基于粘合剂树脂的线性脂族单体的结构单元的质量比计算的熔融焓值 采用团体捐款方式。 0.2关系（1）：0.1＆nlE;＆Dgr; H2 /＆Dgr; H（theo。）＆nlE; 0.3关系（2）：
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公开(公告)号：US20150099223A1
公开(公告)日：2015-04-09
申请号：US14504827
申请日：2014-10-02
Applicant: Konica Minolta, Inc.
Inventor： Tokyo OSHIBA , Ken OHMURA , Kaori MATSUSHIMA , Noboru UEDA , Ito KOGA , Noriyuki KIMPARA
CPC classification number: G03G9/08755 , C08G63/16 , C08L67/02 , G03G9/08795 , G03G9/08797 , C08L9/02
Abstract: Provided is a toner for developing electrostatic images having excellent low temperature fixability and heat resistance storability.In order to achieve at least one of the aforementioned purposes, provided is a toner for developing electrostatic images containing a first resin which is a crystalline polyester resin consisting of a dicarboxylic acid unit and a dialcohol unit (weight average molecular weight is 5000 to 100000); a second resin (weight average molecular weight is 5000 to 60000) which is a polyester resin consisting of a crystalline segment (weight average molecular weight is 200 to 3000), which consists of a dicarboxylic acid unit and a dialcohol unit, and an amorphous segment, in which a specific carbon number relationship is present between each unit.
Abstract translation: 提供一种用于显影具有优异的低温定影性和耐热储存性的静电图像的调色剂。 为了实现上述目的中的至少一个目的，提供了一种用于显影静电图像的调色剂，其含有由二羧酸单元和二醇单元组成的结晶性聚酯树脂的第一树脂（重均分子量为5000〜100000） ; 作为由二羧酸单元和二元醇单元构成的结晶性链段（重均分子量为200〜3000）的聚酯树脂和重均分子量为5000〜60000的第二树脂（重均分子量为5000〜60000） ，其中在每个单元之间存在特定的碳数关系。
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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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Patent Agency Ranking
公开(公告)号：US20200379365A1
公开(公告)日：2020-12-03
申请号：US16884817
申请日：2020-05-27
Applicant: Konica Minolta, Inc.
Inventor： Aya SHIRAI , Noboru UEDA , Takaki KAWAMURA , Yusuke TAKIGAURA , Natsuki ITO , Ami MOTOHASHI
Abstract: An object of the present invention is to provide a new electrostatic latent image developing toner capable of suppressing adhesiveness of a release agent to a member such as a roller or the like and capable of suppressing gloss unevenness and gloss memory.An electrostatic latent image developing toner containing a binder resin, a release agent, and a colorant, wherein the binder resin contains a crystalline resin, the release agent contains a hydrocarbon wax having a branching degree of 3 to 52%, and a top temperature of an exothermic peak during cooling of the electrostatic latent image developing toner measured by a differential scanning calorimetry is within a range of 60 to 85° C.
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公开(公告)号：US20170205722A1
公开(公告)日：2017-07-20
申请号：US15278687
申请日：2016-09-28
Applicant: Konica Minolta, Inc.
Inventor： Shiro HIRANO , Noboru UEDA , Kouji SUGAMA , Junya ONISHI , Aya SHIRAI , Tatsuya FUJISAKI
CPC classification number: G03G9/08711 , G03G9/0825 , G03G9/08722 , G03G9/08733 , G03G9/08755 , G03G9/0902 , G03G9/0904 , G03G9/0926 , G03G9/09321 , G03G9/09342 , G03G9/09364 , G03G9/09392 , G03G9/09708 , G03G9/09725
Abstract: The present invention relates to a toner for electrostatic charge image development, including toner base particles containing a binder resin containing as a main component a vinyl resin having a constitutional unit derived from a monomer having an acid group, and aluminum, wherein a concentration of the aluminum in the toner base particles, as measured by radio inductively coupled plasma emission spectral analysis, is from 900 to 2,200 ppm. According to the present invention, there is provided a means for improving the environmental stability of electrification, and the glossiness and the image density of the image to be formed in a good balance while maintaining sufficient low temperature fixability in a toner for electrostatic charge image development.
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公开(公告)号：US20180081288A1
公开(公告)日：2018-03-22
申请号：US15692661
申请日：2017-08-31
Applicant: Konica Minolta, Inc.
Inventor： Kouji SUGAMA , Shiro HIRANO , Noboru UEDA , Kaori MATSUSHIMA
IPC: G03G9/087
CPC classification number: G03G9/08755 , G03G9/08711 , G03G9/08728 , G03G9/08782 , G03G9/08795 , G03G9/08797
Abstract: A toner for electrostatic charge image development contains a binder resin and a releasing agent. The binder resin contains an amorphous polyester resin as a main component and a vinyl resin, the vinyl resin contains a constitutional unit derived from a specific monomer. The releasing agent has a melting point of from 65 to 90° C. and contains an ester wax.
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公开(公告)号：US20170285502A1
公开(公告)日：2017-10-05
申请号：US15444465
申请日：2017-02-28
Applicant: Konica Minolta, Inc.
Inventor： Tatsuya FUJISAKI , Noboru UEDA
CPC classification number: G03G9/08711 , G03G9/0821 , G03G9/08755 , G03G9/0904 , G03G9/091 , G03G9/0918 , G03G9/092 , G03G15/08
Abstract: The present invention relates to a toner for electrostatic charge image development, including: a toner base particle having at least a binder resin, a releasing agent, and a colorant, wherein the following formula (1) is satisfied wherein a maximum value and a minimum value of a dielectric loss tangent tan δ, which are obtained by measuring at a frequency in the range of 1 kHz to 100 kHz under the condition at a temperature of 20° C. and a relative humidity of 50% RH, are defined as tan δmax and tan δmin, respectively. According to the present invention, a toner for electrostatic charge image development, with which the rising of the toner charge amount is improved while ensuring the low temperature fixability, and a high quality image having less density unevenness can be obtained even during the image forming at a high speed and a high printing rate, is provided. Frequency showing tan δmax
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公开(公告)号：US20170255114A1
公开(公告)日：2017-09-07
申请号：US15439435
申请日：2017-02-22
Applicant: Konica Minolta, Inc.
Inventor： Junya ONISHI , Shiro HIRANO , Noboru UEDA , Kouji SUGAMA , Aya SHIRAI
CPC classification number: G03G9/0804 , G03G9/0815 , G03G9/0825 , G03G9/08755 , G03G9/08795 , G03G9/08797
Abstract: A process for producing a toner of the present invention includes: a first step of heating a dispersion containing an aqueous medium and a binder resin containing a crystalline resin to a temperature higher than or equal to a melting point of the crystalline resin; and a second step of maintaining the dispersion at temperature T (° C.) for 30 minutes or longer in a state where a pH of the dispersion is maintained at 5.5 or higher and 9.0 or lower, in which the temperature T satisfies the following expression, Rc−25≦T≦Rc−5, where the Rc represents a recrystallization temperature (° C.) of the crystalline resin.
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