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    GRAFTED SUPERFINE PARTICLE AND ITS MANUFACTURE
    3.
    发明专利
    GRAFTED SUPERFINE PARTICLE AND ITS MANUFACTURE 失效

    公开(公告)号：JPH107723A

    公开(公告)日：1998-01-13

    申请号：JP16220496

    申请日：1996-06-21

    申请人： FUJIMORI KOGYO CO ,  TOKYO BI TECH LAB INC

    发明人： AOYANAGI SHIGEO ,  SUZUKI TOYOAKI ,  MIURA KOICHI

    IPC分类号： C08F8/00 ,  C08F120/56 ,  C08F265/00 ,  C08F265/10

    摘要： PROBLEM TO BE SOLVED: To provide a method for producing polyacrylamide superfine particles having surface functional groups wherein the surface area per unit weight is great and molecular chains having suitable lengths are introduced onto the surfaces of the superfine particles so that steric hindrance or the like may not occur between elements to be fixed, such as ligands, and the surfaces. SOLUTION: This method for producing grafted superfine particles comprises adding polyacrylamide superfine particles having surface functional groups and a particle diameter of 0.05 to 0.5μm and an oligomer whose terminals are functional to a solvent, mixing and stirring them to disperse the polyacrylamide superfine particles and to dissolve the oligomer whose terminals are functional, adding a condensation agent to the solvent, and causing a graft reaction thereof to take place at a reaction temperature of 0 to 50 deg.C thereby introducing the oligomer whose terminals are functional onto the polyacrylamide superfine particles.

    POLYMER THERMALLY REVERSIBLE BETWEEN HYDROPHILIC AND HYDROPHOBIC STATE AND PRODUCTION THEREOF
    5.
    发明专利
    POLYMER THERMALLY REVERSIBLE BETWEEN HYDROPHILIC AND HYDROPHOBIC STATE AND PRODUCTION THEREOF 失效

    公开(公告)号：JPS62243608A

    公开(公告)日：1987-10-24

    申请号：JP8754986

    申请日：1986-04-16

    申请人： AGENCY IND SCIENCE TECHN

    发明人： ITO SHOJI ,  MIZOGUCHI KENSAKU ,  SUDA MASAO

    IPC分类号： C08F20/56 ,  C08F20/52 ,  C08F120/56

    摘要： PURPOSE:To produce the titled polymer having thermal reversibility to become hydrophobic at high temperature and reversibly convertible between a water-soluble state at low temperature and water-insoluble state at high temperature, in high efficiency, by the radical polymerization of N-methyl-N- isopropylacrylamide. CONSTITUTION:The objective polymer of formula II is produced by the radical polymerization of N-methyl-N-isopropylacrylamide of formula I usually in the form of a 1-80wt% solution under radiation of actinic ray, heating in the presence of radical polymerization initiator or radiating light in the presence of a photo-sensitizer, etc. USE:Light-shielding material for greenhouse or chemical laboratory, etc., temperature sensor, toys, interior goods, mechanochemical element material, etc.

    10.
    发明专利
    失效

    公开(公告)号：JPS5035274A

    公开(公告)日：1975-04-03

    申请号：JP8699373

    申请日：1973-08-02

    IPC分类号： C08F6/00 ,  C08F120/56