| abstract |
Methanol wetting is 10-49%, especially DBP absorbency (dry matter) is 250g / 100g or more, average particle size is 1-12μm and / or carbon content is 0.3-1.85% and / or dry loss is 2.6- Partially hydrophobic precipitated silica characterized by 10.0% and / or pH value of 5.5 to 10.0 is mixed with a certain amount of water repellent with precipitated silica suspension at very short residence times and at low pH values, the solids are filtered off, Prepared by washing to remove, drying, working up with heat and pulverizing.n n n Partially hydrophobic precipitated silicas are used in active material blends and antifoams of active material blends and hydrolysis sensitive materials. |