Precipitated silicas are mainly used as a reinforcement agent in rubber and tyre formulations. They are additionally utilized as carriers. Anti-caking or free-flow agents in consmetics and food applications and as abrasive or thickener in toothpaste’s and cosmetics.
Infact, the uses of precipitated silica in rubber applications are more, whereas, the volume used in non rubber industry will be much higher. In India, use of rubber; non rubber will be 70:30 approximately: whereas, world wide the above ratio is close to 55:45
Use in Rubber:
Rubber rice rollers
In silicone rubber, however, fuming silica has wide application. Use of fuming silica, which is another kind of processing silica has very limited applications because of its higher price and presently, it is mostly tried in silicone based compounds.
Products formulated with one hundred percent use of precipitated silica in Indian Rubber compounding, however, is very rare, unless one attempts a colourful reinforced rubber compound. In India, major use of precipitated silica is with carbon black, replacing a part of it where additional tear resistance and abrasion resistance are important.
Use in non rubber:
Free flow salts
Precipitated silica is widely marketed in free flowing powder that improves free flowing properties of the products like salt, detergent, talcum etc. It is also used as anticaking agent that absorbs the moisture and make the detergent light also making it bulk.