Composition and method of making a ferrofluid having an improved chemical stability
    1.
    发明授权
    Composition and method of making a ferrofluid having an improved chemical stability 有权
    制备具有改善的化学稳定性的铁磁流体的组成和方法

    公开(公告)号:US06261471B1

    公开(公告)日:2001-07-17

    申请号:US09418892

    申请日:1999-10-15

    IPC分类号: C04B128

    CPC分类号: H01F1/44

    摘要: The invention relates to a composition and a process for producing a magnetic fluid comprising finely divided magnetic particles covered with at least one surfactant. A fluorocarbon-silane surface modifier is employed which is added to cover the free oxidizable exterior surface of the outer layer of the particles to increase the acid resistance of the colloid.

    摘要翻译: 本发明涉及包含用至少一种表面活性剂覆盖的细碎磁性颗粒的磁性流体的组合物和方法。 使用碳氟硅烷表面改性剂,其加入以覆盖颗粒外层的游离可氧化外表面以增加胶体的耐酸性。

    Ferrofluid composition and process
    2.
    发明授权
    Ferrofluid composition and process 有权
    铁液组成和工艺

    公开(公告)号:US06277298B1

    公开(公告)日:2001-08-21

    申请号:US09429189

    申请日:1999-10-28

    IPC分类号: H01F128

    CPC分类号: H01F1/44

    摘要: The invention relates to a composition and process for producing a chemically stable magnetic fluid comprising a plurality of magnetic particles covered first with a small molecular weight surface modifier, which is a nondispersant and acts as a surfactant-accepting layer, and then with at least one surfactant. The surface modifier/surfactant coated magnetic particles are then suspended in a silicone oil-based, hydrocarbon oil-based or an ester oil-based carrier liquid.

    摘要翻译: 本发明涉及一种用于生产化学稳定的磁性流体的组合物和方法,其包括首先用小分子量表面改性剂覆盖的多个磁性颗粒,所述小分子量表面改性剂是非分散性的并且用作表面活性剂接受层,然后与至少一种 表面活性剂。 然后将表面改性剂/表面活性剂涂覆的磁性颗粒悬浮在硅油基烃油或酯油基载体液体中。