| 摘要 |
PURPOSE:To increase the dispersibility of the magnetic powder, by reforming the surface of the magnetic grain, whose surface is at least an oxide to the lipophilic surface by the titanium compound (particularly titanium alcoholate compound). CONSTITUTION:The titanium alcoholate compound is dissolved into a solvent which contains the magnetic particle and other pigment but no binder. Then the magnetic coating material is produced with addition of a binder after giving a previous surface treatment to the magnetic powder (and pigment). Otherwise the magnetic particle and other pigment are mixed uniformly with the titanium alcoholate compound by the stirring or other methods, and this mixture is dispersed into a binder and solvent to obtain the magnetic coating material. The titanium alcoholate compound is used preferably by 0.5-20pts.wt.preferably 1.0-15pts.wt.to 100pts. wt. magnetic particle. |
