| 摘要 |
PURPOSE:To obtain easily and inexpensively polymer-coated magnetic particles whose entire surfaces are uniformly coated with a polymer by performing the polymerization in an aqueous suspension in the presence of magnetic particles to form a polymer terminated with a specified group on the surfaces of the magnetic particles. CONSTITUTION:The objective particles are obtained by performing the polymerization in an aqueous suspension in the presence of magnetic particles to form a polymer terminated with at least one group selected from among carboxyl, sulfonic, sulfate and their salts on the surfaces of the magnetic particles. The magnetic particles are represented by MeO.Fe2O3 (wherein Me is a bivalent metal). Although the kind of the metal, shape and particle diameter of the magnetic particles can be suitable selected according to the intended use, the mean particle diameter is desirably about 0.1-10mum. The terminals of the polymer can be introduced into the polymer by using a radical polymerization initiator such as a specified peroxide, azo compound or redox catalyst in performing the polymerization of a vinyl monomer in an aqueous suspension. |
