| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain an encapsulated material that sufficiently reads magnetic information by a magnetic head, prints magnetic information, has excellent dispersion stability of magnetic substance particle and excellent ink-jet reliability of clogging prevention and an ink composition using the same. <P>SOLUTION: The encapsulated material is obtained by coating a magnetic substance particle having an electric charge on the surface with a wall material comprising a polymer as a main component. The polymer has (A) a repeating structural unit derived from an ionic polymerizable surfactant A having an electric charge opposite to an electric charge on the surface of the magnetic substance particle and/or an ionic monomer having an electric charge opposite to an electric charge on the surface of the magnetic substance particle and (B) a repeating structural unit derived from an ionic polymerizable surfactant B having an electric charge similar to or opposite to the electric charge on the surface of the magnetic substance particle. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
