| 摘要 |
<p>PURPOSE:To improve the flowability of a toner by incorporating a specified amt. of each of fine SiO2 powder and fine TiO2 powder subjected to surface treatment for imparting hydrophobic property into the toner. CONSTITUTION:This toner contains fine SiO2 powder and fine TiO2 powder each subjected to surface treatment for imparting hydrophobic property, the amt. of the fine SiO2 powder is 0.01-3.0wt.% of the amt. of this toner and the amt. of the fine TiO2 powder is 0.01-5.0wt.% of the amt. of this toner. The fine TiO2 powder preferably has 10-50nm particle diameter and 30-300m<2>/g specific surface area. The surface treatment is carried out by dissolving a silane compd. such as vinylsilane or acrylsilane as a hydrophobic property imparting agent in a solvent such as toluene or ethanol, putting fine SiO2 powder and fine TiO2 powder in the resulting soln., and treating and drying the powders.</p> |
