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39 条记录 (耗时 0.03 秒)

    Magnetic fluid composition
    32.
    发明授权
    Magnetic fluid composition 失效
    磁性液体组成

    公开(公告)号：US5124060A

    公开(公告)日：1992-06-23

    申请号：US602701

    申请日：1990-10-24

    申请人： Atsushi Yokouchi ,  Toshikazu Yabe

    发明人： Atsushi Yokouchi ,  Toshikazu Yabe

    IPC分类号： C09D5/23 ,  C09K3/10 ,  C10M131/10 ,  C10M131/12 ,  C10M133/18 ,  C10M133/30 ,  C10N30/04 ,  C10N40/14 ,  C10N40/34 ,  C10N70/00 ,  F16J15/43 ,  H01F1/44

    CPC分类号： F16J15/43 ,  H01F1/44 ,  H01F1/445

    摘要： A magnetic fluid composition comprising a less volatile organic solvent as a dispersing medium, a dispersing agent having oleophilic groups exhibiting an affinity therewith, fine ferromagnetic particles coated at the surface thereof with the dispersing agent and dispersed in the less volatile organic solvent and a fluorocarbon surface active material having an organophobic portion and an organophilic portion together in a unitary molecular structure. The magnetic fluid is prepared by the steps of adding the low boiling organic solvent and the dispersant having oleophilic groups to fine ferromagnetic particles to obtain an intermediate medium, separating the fine particles of poor dispersibility from the intermediate medium and, then adding the less volatile organic solvent and heating the resulting material to evaporate the low boiling organic solvent thereby obtaining a magnetic fluid and, further, adding the fluorocarbon surface active material to the magnetic fluid. The magnetic fluid composition can be used for sealing devices in computer hard disk driver or vacuum apparatus.

    摘要翻译： 包含作为分散介质的挥发性较低的有机溶剂的磁性液体组合物，具有亲和性的亲油基团的分散剂，在其表面涂布有分散剂并分散在不易挥发的有机溶剂中的细小的铁磁颗粒和氟碳表面 具有一部分分子结构的具有疏水性部分和亲有机体部分的活性物质。 通过以下步骤制备磁性流体：将低沸点有机溶剂和具有亲油基团的分散剂加入到细小的铁磁性颗粒中以获得中间介质，将分散性差的细颗粒与中间介质分离，然后加入较不易挥发的有机物 溶剂并加热所得材料以蒸发低沸点有机溶剂，从而获得磁性流体，并且还将氟碳表面活性材料加入到磁性流体中。 磁性液体组合物可用于计算机硬盘驱动器或真空装置中的密封装置。

    Aqueous magnetic fluid composition and process for producing thereof
    33.
    发明授权
    Aqueous magnetic fluid composition and process for producing thereof 失效
    水性磁性液体组合物及其制造方法

    公开(公告)号：US5082581A

    公开(公告)日：1992-01-21

    申请号：US400723

    申请日：1989-08-30

    申请人： Toshikazu Yabe ,  Atsushi Yokouchi

    发明人： Toshikazu Yabe ,  Atsushi Yokouchi

    IPC分类号： H01F1/44

    CPC分类号： H01F1/44

    摘要： An aqueous magnetic fluid composition comprising water as a dispersion medium and fine ferromagnetic particles as a dispersed phase, in which a coupling agent having a hydrophilic group and at least one hydrolyzable group is chemically bonded by way of the reaction product of the hydrolyzable group to the surface of the fine ferromagnetic particles. The magnetic fluid composition is prepared by way of obtaining an intermediate medium by chemically bonding the coupling agent by way of the hydrolysis product to the fine particles and separating fine particles of poor dispersibility and evaporating the composite product of the hydrolysis and at least a portion of water.

    摘要翻译： 一种包含水作为分散介质的水性磁性液体组合物和作为分散相的精细铁磁颗粒，其中具有亲水基团和至少一个可水解基团的偶联剂通过可水解基团的反应产物与 表面的细铁磁颗粒。 通过将水解产物的偶联剂化学键合到细颗粒并分离分散性差的细颗粒并蒸发水解的复合产物和至少部分的水解产物，制备磁性流体组合物 水。

    GREASE
    35.
    发明申请
    GREASE 有权
    润滑脂

    公开(公告)号：US20100035779A1

    公开(公告)日：2010-02-11

    申请号：US12444472

    申请日：2007-10-05

    申请人： Yukitoshi Fujinami ,  Tahei Okada ,  Shinya Nakatani ,  Atsushi Yokouchi

    发明人： Yukitoshi Fujinami ,  Tahei Okada ,  Shinya Nakatani ,  Atsushi Yokouchi

    IPC分类号： C10M105/36 ,  C07C69/34

    CPC分类号： C10M169/06 ,  C10M105/36 ,  C10M2207/2825 ,  C10M2215/006 ,  C10N2230/08 ,  C10N2240/04 ,  C10N2250/10

    摘要： A grease which comprises a base oil containing at least 50% by mass of a diester compound having a total carbon number of 28 to 40 and represented by the general formula (I): R1OOC—(R2)n—COOR3   (I) wherein R1 and R3 each independently represent a C4 to C20 monovalent aliphatic hydrocarbon group, R2 represents a C1 to C20 divalent hydrocarbon group and n is 0 or 1. The grease is excellent in both low-temperature performance and high-temperature performance and has low oil separation tendency even under high centrifugal force (acceleration). In particular, when the grease is used in a rotational transmission device having a built-in one-way clutch, the grease can provide satisfactory clutch engagement property (intermeshing ability) at low temperatures and a prolonged bearing life at high temperatures and is less apt to cause oil separation under high centrifugal force.

    摘要翻译： 含有至少50质量％的总碳数为28〜40，由通式（I）表示的二酯化合物的基油的润滑脂：R1OOC-（R2）n-COOR3（I）其中R1 R 3各自独立地表示C 4〜C 20一价脂肪族烃基，R 2表示C 1〜C 20二价烃基，n为0或1.该润滑脂具有优异的低温性能和高温性能，油分离率低 趋势即使在高离心力（加速度）下。 特别是，在具有内置单向离合器的旋转传动装置中使用润滑脂时，润滑脂能够在低温下提供令人满意的离合器接合性（相互啮合能力），并且在高温下具有延长的轴承寿命并且不太适合 在高离心力下引起油分离。

    Ferrofluid compositions
    39.
    发明授权
    Ferrofluid compositions 失效
    氟化物组合物

    公开(公告)号：US5085789A

    公开(公告)日：1992-02-04

    申请号：US515353

    申请日：1990-04-30

    申请人： Atsushi Yokouchi ,  Toshikazu Yabe

    发明人： Atsushi Yokouchi ,  Toshikazu Yabe

    IPC分类号： C10M169/04 ,  C10N10/14 ,  C10N10/16 ,  C10N40/14 ,  H01F1/12 ,  H01F1/34 ,  H01F1/44

    CPC分类号： H01F1/44

    摘要： A ferrofluid composition is defined by fine particles of ferromagnetic material, a liquid carrier for dispersing the ferromagnetic material and a surfactant or surfactants acting as a dispersant. The surfactant is required to have such relation to the carrier that the surfactant has, as its hydrophobic group portion, a structure equivalent to the carrier, and the carrier is selected to be either an alkylpolyphenyl ether oil, an alkylnaphthalene oil or both. By virtue of this structural feature, fine ferromagnetic particles are uniformly and stably dispersed throughout the carrier which has low viscosity and is thermally very stable.

    摘要翻译： 铁磁流体组合物由铁磁材料的细颗粒，用于分散铁磁材料的液体载体和用作分散剂的表面活性剂或表面活性剂来限定。 表面活性剂需要与表面活性剂具有与载体相当的结构的载体具有这样的关系，并且载体选择为烷基聚苯基醚油，烷基萘油或二者。 由于这种结构特征，精细的铁磁颗粒均匀且稳定地分散在具有低粘度并且热非常稳定的载体中。