Precipitated silica
In precipitated silica, the reaction mixture is held in the alkaline pH region, and offers limited aggregates of primary particles with a diameter of >5 n.m., and specific surface area (<350 m2.g). 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. The resulting white precipitate is filtered, washed and dried in the manufacturing process. Precipitated silica's basic characteristics, which can be altered during the precipitation process, are particle size distribution, porosity, specific surface area and purity.
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The use of silica :
Tire & Rubber Goods (Manufactured Rubber Goods & Tire)
Polymer Performance (Organic Rubber For Footwear, Plastics and TPE, Polymer
for Membranes
Silicone Elastomers), Nutritions & Industrial (Specialties, Nutritions,
Industrial Specialties), Performance Silicas (Dentifrice)
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