AEROSIL® Fumed Silica

Evonik Industries, one of the world's leading specialty chemicals companies.

AEROSIL® is used in silicone sealants which can be found in any bathtub as well as in car paints. It is also used in the production of offshore yachts and in the electronics industry.

The Cary Company is an authorized distributor of Evonik's AEROSIL®, AEROXIDE®, AERODISP®, SIPERNAT®, ACEMATT®, and Dynasylan® product lines. For samples, technical data sheets (TDS), safety data sheets (SDS) or general questions, please contact a specialty chemical representative by email at or by phone at (630) 629-6600.

AEROSIL® Hydrophilic Fumed Silica

Along with the traditional polyester, silicone, paints and coatings applications, hydrophilic AEROSIL® products are used with increasing success in high technology fields. The particle nature and high purity of fumed silica play key roles in the electronics and optical fibers industries. Furthermore, the hydrophilic AEROSIL® grades are characterized by an X-ray amorphous structure. Depending on the market and application, products with various primary particle sizes and different BET-surface areas are available. Certain types are also available in compacted form (V and VV grades) and in a pharmaceutical grade.

AEROSIL® Hydrophobic Fumed Silica

Numerous grades of hydrophobic AEROSIL® fumed silica have been developed to solve particular technical problems. AEROSIL® hydrophobic fumed silica are produced by chemical treatment of hydrophilic grades with silanes or siloxanes. In the finished product the treatment agent is chemically bonded to the previously hydrophilic oxide. AEROSIL® hydrophobic products are characterized, among other things, by a low moisture adsorption, excellent dispersibility, and their ability to adjust rheological behavior, even that of polar systems.

AEROSIL® Fumed Mixed Oxides

AEROSIL® MOX grades are recommended for the production of highly-loaded low viscous aqueous dispersions. The fumed mixed oxides are manufactured (co-fumed) using the AEROSIL-process as previously described, and may be regarded as a mixture of SiO2 and Al2O3 on the molecular level. AEROSIL® COK 84 is a physical mixture of SiO2 and Al2O3 which provides strong thickening effects in aqueous media.

AEROSIL® AEROPERL® Fumed Silica Granulates

In contrast to Evonik's fine-particle core product AEROSIL®, AEROPERL® is a mechanically stable granulate consisting of spherical particles with an average size of about 30 micrometers (or 30 millionths of a meter). The highly porous granules of pure silicon dioxide are eminently suitable as carrier substances for active ingredients, fragrances, and flavors in liquid or paste form, or for other liquids that must be incorporated into powder formulations. AEROPERL® facilitates these kinds of manufacturing processes because its granular property makes it remarkably easy to handle.