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公开(公告)号：US20220081319A1
公开(公告)日：2022-03-17
申请号：US17419346
申请日：2020-02-04
发明人： Shin-ichi OHKOSHI , Asuka NAMAI , Marie YOSHIKIYO , Daisuke KODAMA , Shiho OBATA , Masahiro GOTOH
摘要： An iron-based oxide magnetic powder has good thermal stability and a small change in coercive force even in a high-temperature environment and is one composed of particles of ε-iron oxide in which Fe sites are partially substituted by another metal element. A production method for such an iron-based oxide magnetic powder includes allowing a phosphorus-containing ion to coexist when a precipitate of an iron hydroxide containing a substituent metal element produced by neutralizing an acidic aqueous solution containing a trivalent iron ion and an ion of a metal that partially substitutes Fe sites is coated with silicon oxide using a silane compound.
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公开(公告)号：US20210122937A1
公开(公告)日：2021-04-29
申请号：US16486888
申请日：2018-02-27
发明人： Kimitaka SATO , Daisuke KODAMA , Satoru KUR1TA
IPC分类号： C09D11/52 , B22F1/00 , B22F1/02 , B22F9/24 , C09D11/037 , C09D11/033 , C09D11/14 , H01B1/22
摘要： [Problem] To provide a silver nanowire ink that is capable of stably suppressing the decrease in conductivity of the silver nanowire conductive layer caused by coating a coating liquid for forming a transparent conductive layer.
[Solution] A silver nanowire ink containing a water soluble cellulose ether having a methoxy group, and silver nanowires, in an aqueous solvent, the water soluble cellulose ether having a mass proportion of a methoxy group of from 16.0 to 25.0%. Particularly preferred examples of the water soluble cellulose ether include HPMC having a mass proportion of a hydroxypropoxy group of 10.0% or less and HEMC having a mass proportion of a hydroxyethoxy group of 12.0% or less.-
公开(公告)号：US20210050132A1
公开(公告)日：2021-02-18
申请号：US16957397
申请日：2019-01-11
发明人： Daisuke KODAMA , Masahiro GOTOH
IPC分类号： H01F1/147 , B22F1/02 , H01F27/255
摘要： A silicon oxide-coated iron powder has a small particle diameter, can achieve high in a high frequency band, and has high insulating property. In a method for producing the powder, a silicon alkoxide is added to a slurry containing iron powder having an average particle diameter of 0.25 μm or more and 0.80 μm or less and an average axial ratio of 1.5 or less dispersed in a mixed solvent of water and an organic material containing water in an amount of 1% by mass or more and 40% by mass or less. Then, a hydrolysis catalyst for the silicon alkoxide is added to perform silicon oxide coating, the method resulting in a silicon oxide-coated iron powder having the high μ′ in a high frequency band and the high insulating property.
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公开(公告)号：US20220162089A1
公开(公告)日：2022-05-26
申请号：US17433684
申请日：2020-03-13
发明人： Tatsuro HORI , Daisuke KODAMA , Shiho OBATA , Masahiro GOTOH
摘要： A substituted ε-iron oxide magnetic particle powder having a reduced content of an α-type iron-based oxide and Fe sites of ε-Fe2O3 partially substituted by another metal element is obtained by neutralizing an acidic aqueous solution containing a trivalent iron ion and an ion of a metal that partially substitutes Fe sites to a pH of between 2.0 and 7.0. Thereafter, a silicon compound having a hydrolyzable group is added to a dispersion liquid containing an iron oxyhydroxide having a substituent metal element or a mixture of an iron oxyhydroxide and a hydroxide of a substituent metal element. The dispersion liquid is neutralized to a pH of 8.0 or higher and the iron oxyhydroxide having a substituent metal element or the mixture of the iron oxyhydroxide and the hydroxide of a substituent metal element is coated with a chemical reaction product of the silicon compound. The dispersion is then heated.
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5.发明申请公开(公告)号：US20200030877A1
公开(公告)日：2020-01-30
申请号：US16491226
申请日：2018-03-13
发明人： Kimitaka SATO , Hirotoshi SAITO , Daisuke KODAMA
摘要： A method for producing a silver nanowire dispersion liquid which exhibits good separability among wires, including: subjecting a liquid having dispersed therein silver nanowires having an average length of 10 μm or more, to at least once of filtration including filtration with an organic fiber mesh filter having an aperture of 8 μm or more and 120 μm or less, so as to provide a filtrate having dispersed therein silver nanowires having an average length of 10 μm or more (preliminary filtering step); and subjecting the filtrate obtained in the preliminary filtering step, to at least once of filtration including filtration with an organic fiber mesh filter having an aperture of 12 μm or less, so as to provide a filtrate having dispersed therein silver nanowires having an average length of 10 μm or more (finish filtering step).
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6.发明申请METHOD FOR PRODUCING SILVER NANOWIRES INK, SILVER NANOWIRES INK, AND TRANSPARENT CONDUCTIVE COATED FILM 审中-公开生产银纳米油墨，银纳米油墨和透明导电涂膜的方法公开(公告)号：US20170015857A1
公开(公告)日：2017-01-19
申请号：US15124090
申请日：2015-03-11
发明人： Daisuke KODAMA , Hirotoshi SAITO , Kimitaka SATO
IPC分类号： C09D11/52 , C09D11/03 , H01B1/22 , C09D11/102
CPC分类号： C09D11/52 , C09D11/03 , C09D11/102 , C09D11/107 , H01B1/22
摘要： A method for producing a silver nanowires ink comprises adding a viscosity modifier and a water-soluble acrylic-urethane copolymer resin to an aqueous solvent or a mixed solvent of water and an alcohol having silver nanowires dispersed therein. The content of the water-soluble acrylic-urethane copolymer resin with respect to the total amount of the silver nanowires ink may be from 0.05 to 2.0% by mass. The content of silver with respect to the total amount of the silver nanowires ink is preferably from 0.05 to 1.0% by mass. The content of the viscosity modifier with respect to the total amount of the silver nanowires ink is preferably from 0.01 to 1.0% by mass. The viscosity of the silver nanowires ink is preferably controlled to a range of from 1 to 100 mPa·s. The method provides a transparent conductive coated film that is excellent in conductivity, light transmissibility, haze characteristics, and adhesiveness.
摘要翻译： 一种银纳米线油墨的制造方法，其特征在于，在水溶性或水分散的银纳米线的醇的混合溶剂中添加粘度调节剂和水溶性丙烯酸 - 氨基甲酸酯共聚物树脂。 相对于银纳米线油墨的总量，水溶性丙烯酸 - 氨基甲酸酯共聚物树脂的含量可以为0.05-2.0质量％。 相对于银纳米线油墨的总量，银的含量优选为0.05〜1.0质量％。 粘度调节剂相对于银纳米线油墨的总量的含量优选为0.01〜1.0质量％。 优选将银纳米线油墨的粘度控制在1〜100mPa·s的范围。 该方法提供导电性，透光性，雾度特性和粘合性优异的透明导电性涂膜。
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公开(公告)号：US20200061701A1
公开(公告)日：2020-02-27
申请号：US16462591
申请日：2017-12-06
发明人： Hirotoshi SAITO , Kimitaka SATO , Daisuke KODAMA
IPC分类号： B22F1/00 , B22F9/24 , C09D11/52 , C09D11/037 , C09D11/106 , H01B1/02 , H01B3/44
摘要： Silver nanowires that are capable of significantly improving conductivity and visibility characteristics of a transparent conductor have attached to a surface thereof an organic protective agent, have an average diameter of 50 nm or less, an average length of 10 μm or more, and the organic protective agent is 1.5 to 8.0% by mass based on the total amount of the organic protective agent and silver. The silver nanowires can be made by circulating silver nanowires with the attached organic protective agent in a circulation flow channel having in a middle thereof a crossflow filter, along with a liquid medium. Crossflow filtration is performed with the filter while replenishing the liquid medium to the circulation flow channel continuously or intermittently, so as to wash off/remove a part of the organic protective agent on the surface of the silver nanowires to control an amount of the organic protective agent attached.
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公开(公告)号：US20220089456A1
公开(公告)日：2022-03-24
申请号：US17433672
申请日：2020-02-28
发明人： Tatsuro HORI , Daisuke KODAMA , Shiho OBATA , Masahiro GOTOH
摘要： A substitution-type ε-iron oxide magnetic particle powder having a reduced content of a non-magnetic α-type iron-based oxide and Fe sites of ε-Fe2O3 partially substituted by another metal element is obtained by neutralizing an acidic aqueous solution containing a trivalent iron ion and an ion of a metal that partially substitutes Fe sites to a pH of 2.0 or higher and 7.0 or lower. A silicon compound having a hydrolyzable group is added to a dispersion liquid containing an iron oxyhydroxide having a substituent metal element or a mixture of an iron oxyhydroxide and a hydroxide of a substituent metal element. The dispersion liquid is neutralized to a pH of 8.0 or higher and the iron oxyhydroxide having a substituent metal element or the mixture of the iron oxyhydroxide and the hydroxide of a substituent metal element is coated with a chemical reaction product of the silicon compound and then heated.
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9.发明申请公开(公告)号：US20170278596A1
公开(公告)日：2017-09-28
申请号：US15506786
申请日：2015-09-03
发明人： Kimitaka SATO , Hirotoshi SAITO , Daisuke KODAMA
CPC分类号： H01B13/0026 , B01D61/147 , B01D69/04 , B01D71/02 , B01D2315/10 , B01D2325/20 , B22F1/0025 , B82Y30/00 , B82Y40/00 , C09D11/52 , H01B5/14 , H01B13/322
摘要： A method for producing metal nanowires having improved uniformity in length distribution and having a small abundance ratio of short nanowire comprises making metal nanowires to flow accompanied by a flow of a liquid medium in a tubular flow path having, on a wall of the flow path, a porous ceramic filter having an average pore diameter by the mercury intrusion method of 1.0 mm or more. A part of the flowing metal nanowires is discharged to an outside of the tubular flow path through the porous ceramic filter along with a part of the liquid medium and the metal nanowires that flow in the flow path but are not discharged to the outside of the tubular flow path are recovered.
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公开(公告)号：US20170120327A1
公开(公告)日：2017-05-04
申请号：US15333484
申请日：2016-10-25
发明人： Jeyadevan BALACHANDRAN , Jhon Lehman Cuya HUAMAN , Takuya NAITO , Kimitaka SATO , Daisuke KODAMA
CPC分类号： B22F1/02 , B22F1/0018 , B22F1/0022 , B22F1/0025 , B22F9/24 , B22F2301/255 , B22F2302/45
摘要： Silver nanowires coated with, instead of a polymer protective agent such as PVP, an organic protective agent having a smaller molecular weight are provided. The silver nanowires have an average diameter of 100 nm or less and an average length of 5 μm or more, and a thiol having a molecular weight of 75 to 300 is adhered on surfaces of the metal silver. The silver nanowires have a thiol containing one thiol group in the structure adhered thereon. A thiol having only one thiol group (—S—H) in a molecule is a suitable target. Examples thereof include 1-dodecanethiol, 1-decanethiol, 1-octanethiol, 3-mercapto-1,2-propanediol, monoethanolamine thioglycolate, ammonium thioglycolate, and thiomalic acid.
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