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公开(公告)号：US20150248908A1
公开(公告)日：2015-09-03
申请号：US14698913
申请日：2015-04-29
Applicant: FUJIFILM Corporation
Inventor： Yohei ARITOSHI , Kazufumi OMURA
CPC classification number: G11B5/7013 , G11B5/7021 , G11B5/7022 , G11B5/7023 , G11B5/73 , G11B5/7305 , G11B5/733
Abstract: An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the magnetic layer and/or nonmagnetic layer comprises organic acid A and organic acid B below, with an acid strength pKa(A) of organic acid A and an acid strength pKa(B) of organic acid B satisfying a relation of pKa(A)
Abstract translation: 本发明的一个方面涉及一种在非磁性载体上依次包含非磁性粉末和粘合剂的非磁性层和包含铁磁性粉末和粘合剂的磁性层的磁性记录介质，其中磁性层和/或非磁性材料 层A包含有机酸A和有机酸B，具有酸性强度pKa（A）的有机酸A和有机酸B的酸度pKa（B）满足pKa（A）
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公开(公告)号：US20150302880A1
公开(公告)日：2015-10-22
申请号：US14755395
申请日：2015-06-30
Applicant: FUJIFILM Corporation
Inventor： Kazufumi OMURA , Masahiko MORI
IPC: G11B5/842
CPC classification number: G11B5/842 , G11B5/70678 , H01F1/11
Abstract: An aspect of the present invention relates to a method of manufacturing magnetic powder, which comprises adding an alkali metal salt compound comprising a substituent selected from the group consisting of an alkali metal salt of a carboxyl group and an alkali metal salt of a hydroxyl group to a water-based magnetic liquid comprising magnetic particles dispersed in an acidic water-based solvent to cause the magnetic particles to aggregate in the water-based magnetic liquid; and collecting the aggregated magnetic particles to obtain the magnetic powder.
Abstract translation: 本发明的一个方面涉及一种制造磁粉的方法，该方法包括将包含选自羧基的碱金属盐和羟基碱金属盐的取代基的碱金属盐化合物加入到 包含分散在酸性水性溶剂中的磁性粒子以使磁性粒子在水性磁性液体中聚集的水性磁性液体; 并收集聚集的磁性颗粒以获得磁性粉末。
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3.发明申请公开(公告)号：US20130164563A1
公开(公告)日：2013-06-27
申请号：US13727140
申请日：2012-12-26
Applicant: FUJIFILM Corporation
Inventor： Kazufumi OMURA , Masahiko MORI
IPC: G11B5/706
CPC classification number: G11B5/70626 , G11B5/64 , G11B5/65 , G11B5/712 , H01F1/11
Abstract: An aspect of the present invention relates to a method of manufacturing magnetic particles, which comprises adding a carboxylic acid compound to a water-based magnetic liquid, wherein the water-based magnetic liquid comprises magnetic particles dispersed in an acidic water-based solvent, and the carboxylic acid compound is selected from the group consisting of aromatic compounds and aliphatic compounds having one or more carboxylic acid (salt) groups denoted by: —COOM wherein M denotes a hydrogen atom or an alkali metal atom, when the number of the carboxylic acid (salt) group contained within the molecule thereof is 1, the number of carbon atoms, excluding the carboxylic acid (salt) group portion, ranges from 1 to 13; and then collecting the magnetic particles from the water-based magnetic liquid to obtain the magnetic particles the surfaces of which have been modified by being coated with the carboxylic acid compound.
Abstract translation: 本发明的一个方面涉及一种制造磁性颗粒的方法，其包括向水性磁性液体中加入羧酸化合物，其中所述水性磁性液体包含分散在酸性水基溶剂中的磁性颗粒，以及 羧酸化合物选自具有一个或多个羧酸（盐）基团的芳族化合物和脂族化合物，其表示为：-COOM，其中M表示氢原子或碱金属原子，当羧酸数 （盐）基团为1，除羧酸（盐）基部分以外的碳原子数为1〜13; 然后从水性磁性液体中收集磁性颗粒，得到其表面被羧酸化合物涂覆而被改性的磁性颗粒。
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公开(公告)号：US20130108891A1
公开(公告)日：2013-05-02
申请号：US13661964
申请日：2012-10-26
Applicant: FUJIFILM CORPORATION
Inventor： Kazufumi OMURA , Masahiko MORI
CPC classification number: G11B5/842 , G11B5/70678 , H01F1/11
Abstract: An aspect of the present invention relates to a method of manufacturing magnetic powder, which comprises adding an alkali metal salt compound comprising a substituent selected from the group consisting of an alkali metal salt of a carboxyl group and an alkali metal salt of a hydroxyl group to a water-based magnetic liquid comprising magnetic particles dispersed in an acidic water-based solvent to cause the magnetic particles to aggregate in the water-based magnetic liquid; and collecting the aggregated magnetic particles to obtain the magnetic powder.
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公开(公告)号：US20160093323A1
公开(公告)日：2016-03-31
申请号：US14870618
申请日：2015-09-30
Applicant: FUJIFILM Corporation
Inventor： Kazufumi OMURA
Abstract: The magnetic tape comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and comprises a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein a fatty acid ester, a fatty acid amide, and a fatty acid are contained in either one or both of the magnetic layer and the nonmagnetic layer, with the magnetic layer and nonmagnetic layer each comprising at least one selected from the group consisting of a fatty acid ester, a fatty acid amide, and a fatty acid, a quantity of fatty acid ester per unit area of the magnetic layer in extraction components extracted from a surface of the magnetic layer with n-hexane falls within a range of 1.00 mg/m2 to 10.00 mg/m2, and a weight ratio of the quantity of fatty acid ester per unit area of the magnetic layer to a combined total of a quantity of fatty acid amide and a quantity of fatty acid, quantity of fatty acid ester/(quantity of fatty acid amide+quantity of fatty acid), per unit area of the magnetic layer falls within a range of 1.00 to 3.00 in the extraction components.
Abstract translation: 该磁带包括在非磁性载体上包含非磁性粉末和粘合剂的非磁性层，并且包括在非磁性层上包含铁磁粉末和粘合剂的磁性层，其中包含脂肪酸酯，脂肪酸酰胺和脂肪酸 磁性层和非磁性层中的一个或两个，磁性层和非磁性层各自包含选自脂肪酸酯，脂肪酸酰胺和脂肪酸中的至少一种，脂肪酸的量 由正己烷从磁性层表面提取的提取成分中的磁性层的每单位面积的酸酯落入1.00mg / m 2〜10.00mg / m 2的范围内，脂肪酸酯的重量比 每单位面积的磁性层与脂肪酸酰胺的量和脂肪酸的量的总量，脂肪酸酯的量/（脂肪酸酰胺的量+脂肪酸的量），p 磁性层的单位面积在提取成分中落在1.00〜3.00的范围内。
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Patent Agency Ranking
6.发明申请BINDER FOR MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME, COMPOSITION FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM 审中-公开用于磁记录介质的粘合剂及其制造方法，用于磁记录介质的组合物和磁记录介质公开(公告)号：US20150279405A1
公开(公告)日：2015-10-01
申请号：US14670795
申请日：2015-03-27
Applicant: FUJIFILM CORPORATION
Inventor： Kazufumi OMURA
IPC: G11B5/702 , C08F214/06
CPC classification number: G11B5/7023 , G11B5/7028
Abstract: An aspect of the present invention relates to binder for a magnetic recording medium, which is vinyl chloride resin comprising at least one side chain, the side chain comprising at least one urethane bond and at least one monovalent sulfur-containing substituent denoted by formula (1): —S-A-Z (1) wherein, in formula (1), A denotes a divalent connecting group which may comprise one or more active hydrogen groups and Z denotes an active hydroxyl group.
Abstract translation: 本发明的一个方面涉及一种用于磁记录介质的粘合剂，其是包含至少一个侧链的氯乙烯树脂，所述侧链包含至少一个氨基甲酸酯键和至少一个由式（1）表示的一价含硫取代基 ）：-SAZ（1）其中，在式（1）中，A表示可以包含一个或多个活性氢基团并且Z表示活性羟基的二价连接基团。
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7.发明申请公开(公告)号：US20130184426A1
公开(公告)日：2013-07-18
申请号：US13785356
申请日：2013-03-05
Applicant: FUJIFILM CORPORATION
Inventor： Kazufumi OMURA , Katsumi ARAKI
IPC: C08G18/38
CPC classification number: C08G18/3857 , C08G18/0828 , C08G18/3212 , C08G18/3855 , C08G18/6685 , G11B5/7021
Abstract: An aspect of the present invention relates to a mixture of a sulfonate group-containing compound denoted by general formula (1) with a protonic acid: wherein, in general formula (1), X denotes a divalent linking group; each of R1 and R2 independently denotes an alkyl group comprising at least one hydroxyl group and equal to or more than three carbon atoms or an aralkyl group comprising at least one hydroxyl group and equal to or more than eight carbon atoms; and M denotes a cation.
Abstract translation: 本发明的一个方面涉及由通式（1）表示的含磺酸根基的化合物与质子酸的混合物：其中，通式（1）中，X表示二价连接基团; R 1和R 2各自独立地表示包含至少一个羟基并且等于或大于三个碳原子的烷基或包含至少一个羟基并且等于或大于8个碳原子的芳烷基; M表示阳离子。
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公开(公告)号：US20230127329A1
公开(公告)日：2023-04-27
申请号：US18047655
申请日：2022-10-19
Applicant: FUJIFILM Corporation
Inventor： Kazufumi OMURA , Noriyuki KATO
IPC: C07D407/12
Abstract: An object of the present invention is to provide a lactone compound having excellent radical trapping performance.
Provided is a lactone compound represented by Formula (I). L represents a linking group represented by Formula (L1) or Formula (L2).-
9.发明申请公开(公告)号：US20140151595A1
公开(公告)日：2014-06-05
申请号：US14093884
申请日：2013-12-02
Applicant: FUJIFILM Corporation
Inventor： Yasushi HATTORI , Kazufumi OMURA
CPC classification number: G11B5/70678 , C01G49/0036 , C01P2002/76 , C01P2004/64 , C01P2006/42 , H01F1/11
Abstract: The method of manufacturing hexagonal ferrite magnetic particles includes providing hexagonal ferrite magnetic particles by conducting calcination of particles comprising an iron salt and an alkaline earth metal salt to cause ferritization; and further includes preparing the particles comprising an iron salt and an alkaline earth metal salt by adhering a glass component, followed by the alkaline earth metal salt, to the iron salt; and conducting calcination of the particles prepared to form a calcined product in which hexagonal ferrite is detected as a principal component in X-ray diffraction analysis.
Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法包括：通过对包含铁盐和碱土金属盐的颗粒进行煅烧来提供六方晶系铁氧体磁性颗粒以引起铁素体化; 并且还包括通过将玻璃组分，然后将碱土金属盐粘附到铁盐上来制备包含铁盐和碱土金属盐的颗粒; 对X射线衍射分析中的六方晶系铁氧体进行煅烧，形成以六方晶系铁氧体为主成分的煅烧体。
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10.发明申请CARBON BLACK COMPOSITION, CARBON BLACK-CONTAINING COATING FILM, AND MAGNETIC RECORDING MEDIUM COMPRISING THE SAME 审中-公开炭黑组合物，含碳黑涂层膜和包含其的磁记录介质公开(公告)号：US20140087212A1
公开(公告)日：2014-03-27
申请号：US14038318
申请日：2013-09-26
Applicant: FUJIFILM Corporation
Inventor： Takashi IMAI , Kazufumi OMURA
Abstract: The carbon black composition includes carbon black and an amine compound denoted by formula (1) in a solvent: wherein, in formula (1), n denotes an integer falling within a range of 2 to 4, each of U, V, X, and Y independently denotes a substituent that comprises at least one carbon atom and binds, through the carbon atom, to a carbon atom to which the substituent substitutes, and each of W and Z independently denotes a hydrogen atom or a substituent.
Abstract translation: 炭黑组合物在溶剂中包括炭黑和由式（1）表示的胺化合物：其中，在式（1）中，n表示2〜4的整数，U，V，X， Y独立地表示包含至少一个碳原子并且通过碳原子与取代基所取代的碳原子结合的取代基，W和Z各自独立地表示氢原子或取代基。
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