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    MAGNETIC PARTICLES AND METHOD OF MANUFACTURING THE SAME, AND USAGE THEREOF
    11.
    发明申请
    MAGNETIC PARTICLES AND METHOD OF MANUFACTURING THE SAME, AND USAGE THEREOF 审中-公开
    磁性颗粒及其制造方法及其用途

    公开(公告)号：US20130164564A1

    公开(公告)日：2013-06-27

    申请号：US13727212

    申请日：2012-12-26

    Applicant: FUJIFILM Corporation

    Inventor： Kazufumi OMURA ,  Masahiko MORI

    IPC: G11B5/712

    CPC classification number: G11B5/712

    Abstract: An aspect of the present invention relates to a method of manufacturing magnetic particles, which comprises: adding a 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 compound is selected from the group consisting of amine compounds, aromatic compounds, and aliphatic compounds having one or more monovalent phosphorus polar groups denoted by: wherein m1 denotes 0 or 1, m2 denotes 1 or 2, and M denotes a hydrogen atom or an alkali metal atom; 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 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化合物，其中水性磁性液体包含分散在酸性水基溶剂中的磁性颗粒， 化合物选自胺化合物，芳族化合物和具有一个或多个一价磷极性基团的脂族化合物，其表示为：其中m1表示0或1，m2表示1或2，M表示氢原子或碱 金属原子; 然后从水性磁性液体中收集磁性粒子，得到表面用化合物进行了改性的磁性粒子。

    LACTONE COMPOUND
    12.
    发明公开
    LACTONE COMPOUND 审中-公开

    公开(公告)号：US20230141533A1

    公开(公告)日：2023-05-11

    申请号：US18047654

    申请日：2022-10-19

    Applicant: FUJIFILM Corporation

    Inventor： Kazufumi OMURA

    IPC: C07D307/83

    CPC classification number: C07D307/83

    Abstract: An object of the present invention is to provide a lactone compound having excellent water stability.
    Provided is a lactone compound represented by Formula (I).




    In Formula (I), R1 and R2 each independently represent a substituent which does not have a dissociative proton and has a Hammett's substituent constant σp value of −0.90 or more and −0.03 or less. R3 represents a substituent which does not have a dissociative proton and has a Hammett's substituent constant σp value of −0.90 or more and −0.03 or less, or a hydrogen atom. Y represents a substituent and n represents an integer of 1 to 4. In a case where n is an integer of 2 to 4, a plurality of Y's may be the same substituent or substituents different from each other.

    PIGMENT DISPERSION LIQUID AND INKJET INK
    13.
    发明申请
    PIGMENT DISPERSION LIQUID AND INKJET INK 审中-公开

    公开(公告)号：US20190153231A1

    公开(公告)日：2019-05-23

    申请号：US16252009

    申请日：2019-01-18

    Applicant: FUJIFILM Corporation

    Inventor： Shinya HAYASHI ,  Yoshiaki NAGATA ,  Kazufumi OMURA ,  Kazushi FURUKAWA ,  Keiichi TATEISHI

    IPC: C09B67/46 ,  C09B35/03 ,  C09B33/12 ,  C09D11/322

    Abstract: Provided are a pigment dispersion liquid including a pigment, a polymer dispersant, and water, in which the pigment is a pigment including a compound represented by General Formula (1) as described in the specification, a tautomer thereof, or a salt of the compound or the tautomer, and the polymer dispersant includes a polymer compound having a repeating unit represented by General Formula (2-1) and a repeating unit represented by General Formula (2-2) as described in the specification, and having a structure represented by General Formula (3) introduced into at least one terminal of the main chain; and an inkjet ink including this pigment dispersion liquid. In General Formula (3), L represents a linking group; R4 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; and the symbol * represents a linking bond.

    MAGNETIC RECORDING MEDIUM
    14.
    发明申请
    MAGNETIC RECORDING MEDIUM 审中-公开
    磁记录介质

    公开(公告)号：US20150380037A1

    公开(公告)日：2015-12-31

    申请号：US14754918

    申请日：2015-06-30

    Applicant: FUJIFILM CORPORATION

    Inventor： Yoshinori TAMADA ,  Masahide SATO ,  Kazufumi OMURA

    IPC: G11B5/708

    CPC classification number: G11B5/708 ,  G11B5/7013

    Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein the magnetic layer further comprises carbon black, and a state in which the carbon black is present, as observed in a reflection electron image of a surface of the magnetic layer obtained by a scanning electron microscope, satisfies condition 1 and condition 2 below: condition 1: a number of carbon black particles with a particle size of greater than or equal to 140 nm is greater than or equal to 30 per 1,000 μm2 of area; and condition 2: a number of carbon black particles with a particle size of greater than or equal to 220 nm is less than or equal to 10 per 1,000 μm2 of area.

    Abstract translation: 本发明的一个方面涉及一种磁记录介质，其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，以及在非磁性层上包含铁磁粉末和粘合剂的磁性层，其中所述磁性层还包含炭黑 ，并且如通过扫描型电子显微镜获得的磁性层的反射电子图像中观察到的存在炭黑的状态满足以下条件1和条件2：条件1：炭黑粒子的数量 粒径大于或等于140nm的面积大于或等于30; 条件2：粒径大于或等于220nm的数量的炭黑颗粒小于或等于每1,000平方米面积的10。

    METHOD OF MANUFACTURING HEXAGONAL FERRITE MAGNETIC PARTICLES
    16.
    发明申请
    METHOD OF MANUFACTURING HEXAGONAL FERRITE MAGNETIC PARTICLES 有权
    制造六角形铁素体磁性颗粒的方法

    公开(公告)号：US20140091501A1

    公开(公告)日：2014-04-03

    申请号：US14040041

    申请日：2013-09-27

    Applicant: FUJIFILM Corporation

    Inventor： Yasushi HATTORI ,  Kazufumi OMURA

    IPC: C01G49/00

    CPC classification number: C01G49/0018 ,  B82Y30/00 ,  C01G49/0036 ,  C01P2002/76 ,  C01P2004/64 ,  C01P2006/42 ,  G11B5/70678 ,  G11B5/842

    Abstract: The method of manufacturing hexagonal ferrite magnetic particles, which includes providing hexagonal ferrite magnetic particles by conducting calcination of particles comprising an alkaline earth metal salt and an iron salt to cause ferritization; and further includes causing a glass component to adhere to the particles and then conducting the calcination of the particles to form a calcined product in which hexagonal ferrite is detected as a principal component in X-ray diffraction analysis; and removing the glass component from a surface of the calcined product that has been formed.

    Abstract translation: 制造六方晶系铁氧体磁性颗粒的方法，其包括通过对包含碱土金属盐和铁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; 进一步包括使玻璃成分附着在粒子上，然后进行粒子的煅烧，形成在X射线衍射分析中检测出六方晶系铁氧体作为主要成分的煅烧产物。 以及从形成的煅烧产物的表面除去玻璃成分。

    MAGNETIC RECORDING MEDIUM COATING COMPOSITION AND MAGNETIC RECORDING MEDIUM
    18.
    发明申请
    MAGNETIC RECORDING MEDIUM COATING COMPOSITION AND MAGNETIC RECORDING MEDIUM 审中-公开
    磁记录介质涂料组合物和磁记录介质

    公开(公告)号：US20140087211A1

    公开(公告)日：2014-03-27

    申请号：US14038242

    申请日：2013-09-26

    Applicant: FUJIFILM CORPORATION

    Inventor： Kazufumi OMURA

    IPC: G11B5/733

    CPC classification number: G11B5/733 ,  G11B5/73

    Abstract: The magnetic recording medium coating composition includes carbon black; iron oxide; at least one organic solvent selected from the group consisting of methyl ethyl ketone, cyclohexanone, and isophorone; an organic tertiary amine selected from the group consisting of an aliphatic tertiary monoamine and an alicyclic tertiary amine; and an organic acid.

    Abstract translation: 磁记录介质涂料组合物包括炭黑; 氧化铁; 至少一种选自甲基乙基酮，环己酮和异佛尔酮的有机溶剂; 选自脂族叔胺和脂环族叔胺的有机叔胺; 和有机酸。

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