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公开(公告)号：US20220382179A1
公开(公告)日：2022-12-01
申请号：US17622444
申请日：2020-04-30
Applicant: Kao Corporation
Inventor： Kota IJICHI , Kunihiro KANO , Nobumichi KAMIYOSHI
IPC: G03G9/087 , C08L67/02 , C08G63/672 , C08G63/183
Abstract: A resin binder composition for toners, containing a polyester resin A which is a polycondensate A of raw materials A containing an alkylene oxide adduct of bisphenol A, an aromatic dicarboxylic acid compound, a trivalent or higher polyvalent raw material monomer which is at least any one members of a trihydric or higher polyhydric alcohol and a tricarboxylic or higher polycarboxylic acid compound, and an amorphous acid modified product A of an α-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms, the polyester resin A having a softening point of 120° C. or more and 150° C. or less; and a toner for electrostatic image development, containing these resin binder composition for toners. The resin binder composition for toners of the present invention is suitably used for a toner for electrostatic image development which is usable in development of latent images formed in, for example, electrostatic image development method, electrostatic recording method, electrostatic printing method or the like.
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公开(公告)号：US20180181017A1
公开(公告)日：2018-06-28
申请号：US15735771
申请日：2016-05-20
Applicant: Kao Corporation
Inventor： Nobumichi KAMIYOSHI , Tatsuya YAMADA
CPC classification number: G03G9/132 , G03G9/081 , G03G9/12 , G03G9/125 , G03G9/13 , G03G9/135 , G03G9/1355
Abstract: A liquid developer containing toner particles containing a resin containing a polyester and a pigment, wherein the toner particles are dispersed in an insulating liquid in the presence of a dispersant, wherein the insulating liquid has an evaporation rate after holding at 40° C. for 30 minutes of less than 0.26% by mass; and a method for producing a liquid developer containing toner particles containing a resin containing a polyester and a pigment, wherein the toner particles are dispersed in an insulating liquid in the presence of a dispersant, including: step 1: melt-kneading a resin containing a polyester and a pigment, and pulverizing a kneaded product obtained, to provide toner particles; step 2: adding a dispersant to the toner particles obtained in the step 1, and dispersing the toner particles in an insulating liquid to provide a dispersion of toner particles, and step 3: subjecting the dispersion of toner particles obtained in the step 2 to wet-milling, to provide a liquid developer, wherein the insulating liquid has an evaporation rate after holding at 40° C. for 30 minutes of less than 0.26% by mass. The liquid developer of the present invention is suitably used, for example, in development or the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
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公开(公告)号：US20180239269A1
公开(公告)日：2018-08-23
申请号：US15752642
申请日：2016-08-12
Applicant: Kao Corporation
Inventor： Tatsuya YAMADA , Nobumichi KAMIYOSHI
CPC classification number: G03G9/132 , G03G9/0804 , G03G9/081 , G03G9/0819 , G03G9/0827 , G03G9/09 , G03G9/12 , G03G9/125 , G03G9/13
Abstract: A liquid developer containing toner particles containing a resin containing a polyester and a pigment, wherein the toner particles are dispersed in an insulating liquid in the presence of a dispersant,wherein the insulating liquid has a boiling point of 300° C. or lower, and wherein the insulating liquid has a peak intensity ratio of a methyl group calculated by the formula (1): Peak Intensity Ratio ( % ) of Methyl Groups = A A + B × 100 10 ( 1 ) wherein A is a peak intensity ascribed to CH3 stretching vibration when measured with a Fourier transform infrared spectrometer, B is a total peak intensity ascribed to CH2 stretching vibration and CH stretching vibration, of 25% or more, or wherein the insulating liquid contains a polyisobutene.
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公开(公告)号：US20180181016A1
公开(公告)日：2018-06-28
申请号：US15735751
申请日：2016-05-24
Applicant: Kao Corporation
Inventor： Tatsuya YAMADA , Nobumichi KAMIYOSHI
Abstract: A liquid developer containing toner particles containing a resin binder and a pigment, wherein the toner particles are dispersed in an insulating liquid in the presence of a dispersant, wherein the resin binder contains a polyester resin P having a glass transition temperature of 35° C. or higher, obtained by polycondensing raw material monomers containing an alcohol component comprising an aliphatic diol having 2 or more carbon atoms and 6 or less carbon atoms in an amount of 70% by mol or more and 100% by mol or less, and a carboxylic acid component, and wherein the dispersant contains a copolymer C prepared by polymerizing a monomer A having an amino group and a monomer B represented by the formula (I): wherein R1 is a hydrogen atom or a methyl group; and R2 is an alkyl group having 1 or more carbon atoms and 22 or less carbon atoms or an alkenyl group having 2 or more carbon atoms and 22 or less carbon atoms, each of which may have a substituent, wherein a molar ratio of the monomer A to the monomer B (monomer A/monomer B) is 2/98 or more and 50/50 or less; and a method for producing the same. The liquid developer of the present invention is suitably used in development or the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
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公开(公告)号：US20220269188A1
公开(公告)日：2022-08-25
申请号：US17623087
申请日：2020-04-30
Applicant: Kao Corporation
Inventor： Kota IJICHI , Kunihiro KANO , Nobumichi KAMIYOSHI
IPC: G03G9/087 , C08G63/183
Abstract: A resin binder composition for toners, containing a polyester resin A that is a polycondensate of an alcohol component containing 80% by mol or more of an aliphatic diol having 2 or more carbon atoms and 6 or less carbon atoms and a carboxylic acid component containing an aromatic dicarboxylic acid compound and an amorphous acid modified product A of an α-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms; and a toner for electrostatic image development, containing these resin binder composition for toners. The resin binder composition for toners of the present invention is suitably used for a toner for electrostatic image development which is usable in development of latent images formed in, for example, electrostatic image development method, electrostatic recording method, electrostatic printing method or the like.
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Patent Agency Ranking
公开(公告)号：US20200233330A1
公开(公告)日：2020-07-23
申请号：US16652131
申请日：2018-11-28
Applicant: Kao Corporation
Inventor： Tatsuya YAMADA , Nobumichi KAMIYOSHI , Kosuke TAKEDA
Abstract: A liquid developer containing toner particles containing a resin binder and a colorant, a dispersant, and an insulating liquid, wherein the resin binder contains a polyester-based resin, and wherein the insulating liquid contains 50% by mass or more of a saturated fatty acid ester which is an ester of a saturated fatty acid and an alcohol having 3 or more carbon atoms. The liquid developer of the present invention is suitably used in development or the like of latent images formed in, for example, electrophotography, electrostatic recording method, electrostatic printing method or the like.
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公开(公告)号：US20200064752A1
公开(公告)日：2020-02-27
申请号：US16468103
申请日：2017-11-02
Applicant: Kao Corporation
Inventor： Yuri NANNICHI , Nobumichi KAMIYOSHI
Abstract: A method for producing a liquid developer containing a resin binder containing a resin having an acidic group, a colorant, a basic dispersant, and an insulating liquid, including: step I: stirring raw materials containing the resin binder, the colorant, and the basic dispersant at a temperature of equal to or higher than a glass transition temperature of the resin binder; and step II: adding dropwise from 50 to 500 parts by mass of the insulating liquid to a stirred mixture of the step I, based on 100 parts by mass of the stirred mixture at a temperature of equal to or higher than a glass transition temperature of the resin binder, thereby carrying out a phase inversion emulsification, to provide a dispersion of toner particles. The liquid developer obtainable by the method of the present invention is suitably used in development or the like of latent images formed in, for example, electrophotography, electrostatic recording method, electrostatic printing method or the like.
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公开(公告)号：US20160282743A1
公开(公告)日：2016-09-29
申请号：US15041419
申请日：2016-02-11
Applicant: Kao Corporation
Inventor： Nobumichi KAMIYOSHI , Tatsuya YAMADA
Abstract: A liquid developer containing a dispersion of toner particles containing a polyester resin P having an acid value of 3 mgKOH/g or more and 80 mgKOH/g or less and a pigment in an insulating liquid in the presence of a dispersant, wherein the dispersant contains a copolymer C obtained by polymerizing monomers containing a monomer having a basic functional group and a monomer having a silicone chain, wherein the monomer having a silicone chain has a weight-average molecular weight of 1,000 or more and 10,000 or less, and the copolymer C has a weight-average molecular weight of 10,000 or more and 80,000 or less, and wherein a mass ratio of the monomer having a basic functional group to the monomer having a silicone chain is 3/97 or more and 50/50 or less, and a method for producing the same. The liquid developer of the present invention can be suitably used in development of latent images formed in, for example, an electrophotographic method, an electrostatic recording method, an electrostatic printing method, or the like.
Abstract translation: 一种含有在分散剂存在下含有酸值为3mgKOH / g以上至80mgKOH / g以下的聚酯树脂P和绝缘液体中的颜料的调色剂颗粒分散体的液体显影剂，其中分散剂含有 通过聚合含有具有碱性官能团的单体的单体和具有硅酮链的单体得到的共聚物C，其中具有硅酮链的单体的重均分子量为1,000以上且10,000以下，共聚物C 重均分子量为10,000以上且80,000以下，且具有碱性官能团的单体与具有硅酮链的单体的质量比为3/97以上且50/50以下，以及 其制造方法。 本发明的液体显影剂可以适用于在例如电子照相方法，静电记录方法，静电印刷方法等中形成的潜像的显影。
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公开(公告)号：US20220373910A1
公开(公告)日：2022-11-24
申请号：US17622601
申请日：2020-04-30
Applicant: Kao Corporation
Inventor： Kota IJICHI , Kunihiro KANO , Nobumichi KAMIYOSHI , Akitaka MITSUJI
Abstract: A resin binder composition for toners, containing a polyester resin A having a constituting unit derived from an alcohol component containing an alkylene oxide adduct of bisphenol A and a constituting unit derived from a carboxylic acid component containing an amorphous acid modified product A of an α-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms; a resin binder composition for toners containing a polyester resin A which is a polycondensate of an alcohol component containing an alkylene oxide adduct of bisphenol A and a carboxylic acid component containing an amorphous acid modified product A of an α-olefin polymer having 4 or more carbon atoms and 18 or less carbon atoms; and a toner for electrostatic image development, containing these resin binder composition for toners. The resin binder composition for toners of the present invention is suitably used for a toner for electrostatic image development which is usable in development of latent images formed in, for example, electrostatic image development method, electrostatic recording method, electrostatic printing method or the like.
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公开(公告)号：US20190171126A1
公开(公告)日：2019-06-06
申请号：US16326995
申请日：2017-08-25
Applicant: Kao Corporation
Inventor： Nobumichi KAMIYOSHI , Tatsuya YAMADA , Taiki YAMAMOTO , Kunihiro KANO
Abstract: A liquid developer containing toner particles containing a resin binder containing a polyester-based resin and a colorant, a dispersant, and an insulating liquid, wherein the dispersant contains a dispersant X having an adsorbing group having a nitrogen-containing group represented by the formula (I): wherein each of R1, R2, and R3, which may be identical or different, is an alkylene group having 1 or more carbon atoms and 22 or less carbon atoms, an alkenylene group having 2 or more carbon atoms and 22 or less carbon atoms, an alkynylene group having 2 or more carbon atoms and 22 or less carbon atoms, or an arylene group having 6 or more carbon atoms and 22 or less carbon atoms, and a dispersing group having a hydrocarbon group having a number-average molecular weight of 500 or more, and wherein the dispersant X has a mass ratio of the adsorbing group to the dispersing group (adsorbing group/dispersing group) of 1/99 or more and 42/58 or less, and a proportion of the dispersing group having a hydrocarbon group having a number-average molecular weight of 500 or more in all the dispersing groups of 55% by mass or more. The liquid developer of the present invention is suitably used in development or the like of latent images formed in, for example, electrophotography, electrostatic recording method, electrostatic printing method or the like.
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