Precipitated silica is a silica (SiO2) produced by precipitation from a solution containing silicate salts. It is mainly used in tires and shoe soles.
The production of precipitated silica starts with the reaction of an alkaline silicate solution with a mineral acid. Sulfuric acid and sodium silicate solutions are added simultaneously with agitation to water. Precipitation is carried out under alkaline conditions. The choice of agitation, duration of precipitation, the addition rate of reactants, their temperature and concentration, and pH can vary the properties of the silica. The formation of a gel stage is avoided by stirring at elevated temperatures. The resulting white precipitate is filtered, washed and dried in the manufacturing process.
Na2(SiO2)7 + H2SO4 → 3.3 SiO2 + Na2SO4 + H2O
precipitated silica is used as a carrier and diluent because in comparison with cheaper clays, it has high absorption, easier suspensibility, better compatibility with most toxicants and better stability. Even after extended storage under tropical condition.
Printing Ink : precipitated silica is used a s a thickening and suspending agent, to prevent set off and picking, to heighten brilliance.
Tooth Paste and Tooth Powder : MAHAV precipitated silica is used in the manufacturing of tooth powder like normal, medicated and transparent tooth paste. MAHAV precipitated silica when added to tooth powder or tooth paste acts as a good abrasive agent, thereby cleaning the teeth thoroughly the transparency of highly porous and high surface area of silica permits the development of transparent tooth paste.
Salt : MAHAV precipitated silica provides free flowing characteristics in salt and prevents caking. It dose not effect on taste, odour, colour and nature of the salt.
Coatings : MAHAV precipitated silica is used as thickening, thixotropic, antisettling agent and as matting agent at high concentration. It also reduces gloss of trade sale clear oil modified urethane varnish. It gives satin sheen in nitrocellulose furniture lacquer. It is also preferred in aluminum extrusion coating and coil coating with long guaranteed life, to reduce gloss at all viewing angles. It is gaining use in high solid pigmented metal office furniture finish.
Fire Extinguishing Powders : MAHAV precipitated silica ensures extremely good humidity protection due to its hygroscopic nature, so extinguishers remain fully operational even after extended storage.
- Usage: Plastic Auxiliary Agents,Rubber Auxiliary Agents,Antioxidants
- Purity: 90% min
- Type: Antioxidants