| 摘要 |
<p>Composite white pigments composed of titanium dioxide (TiO2) and kaolin are prepared by subjecting kaolin slurry to spray drying with injected gas to promote droplet fluffing and fragmentation. The slurry contains a hydrocolloid suspending agent and a cationic reagent for making the kaolin particles cationic. The frangible dry material thus produced can be blended with TiO2 particles to produce an extended TiO2 pigment.</p> |
