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    PROCESS FOR PRODUCING POLYMER-COATED FERROMAGNETIC PARTICLE, AND POLYMER-COATED FERROMAGNETIC PARTICLE
    2.
    发明公开
    PROCESS FOR PRODUCING POLYMER-COATED FERROMAGNETIC PARTICLE, AND POLYMER-COATED FERROMAGNETIC PARTICLE 有权
    用于生产聚合物涂覆的铁磁性颗粒和聚合物涂覆的铁磁粒子

    公开(公告)号：EP2000484A1

    公开(公告)日：2008-12-10

    申请号：EP06730145.7

    申请日：2006-03-27

    申请人： Tokyo Institute of Technology

    发明人： HANDA, Hiroshi ,  NISHIO, Kosuke ,  GOKON, Nobuyuki ,  ABE, Masanori

    IPC分类号： C08F2/24 ,  C08F2/44 ,  C08F12/06 ,  C08F12/36 ,  C08F20/32 ,  C08K3/22 ,  C08L57/00

    CPC分类号： C09D125/14 ,  C08F2/24 ,  C08F2/44 ,  C08F212/08 ,  C08F212/36 ,  C08F292/00 ,  C08F2220/325 ,  C08K3/22 ,  C08K2003/2275 ,  G01N33/5434 ,  Y10T428/2998 ,  C08F220/32

    摘要： Polymer coated ferromagnetic particles could be obtained giving a solution to a problem of difficulty in dispersing ferromagnetic fine particles to a level of monodispersion because of their properties apt to form aggregates. Providing hydrophilic character to hydrophobic ferromagnetic particles obtained by adsorbing hydrophobizing agent to hydrophilic ferromagnetic particles, and dispersed using nonionic surface activating agent suppressing ionic strength increase of the particles. Monomer liquid was emulsified using nonionic surface activating agent and ionic surface activating agent. Mixing the dispersion liquid of ferromagnetic particles and the monomer emulsion were mixed and emulsion polymerization was conducted. Then well-dispersed homogeneous and stable polymer coated ferromagnetic particles showing good response to magnetic field were obtained.

    摘要翻译： 聚合物涂覆的铁磁性粒子可以得到给人在由于它们的性质容易形成聚集体的强磁性微粒到的单分散的水平分散解决困难的问题。 提供了亲水特性通过吸附疏水化剂到亲水性的铁磁性颗粒的疏水性获得的铁磁性颗粒，和使用抑制颗粒的离子强度增加非离子型表面活化剂分散。 使用非离子型表面活化剂和离子表面活化剂，其乳化单体液体。 混合铁磁性粒子的分散液和单体乳液混合和乳液聚合什么进行。 表示对磁场响应良好然后充分分散的均匀和稳定的聚合物涂布的铁磁性颗粒获得。