AEROSIL®

Fumed Silica - Hydrophilic and Hydrophobic

For over 70 years Evonik’s™ AEROSIL® has been a market leading brand of fumed silica. With a unique range of both hydrophilic and hydrophobic grades available the number of applications are endless. Fumed (pyrogenic) silica is composed of synthetic silicon dioxide (SiO₂) which is entirely amorphous, eliminating the risks posed by crystalline silica.

One of the main applications for fumed silica is increasing the viscosity, pseudoplasticity and thixotropy of a wide range of liquid systems. However there are many more applications besides this common use case. Evonik’s™ AEROSIL® range is the most extensive range of fumed silica on the market, with many of their products tailored for particular applications. The versatility of AEROSIL® means that it can be found all around us, from the paints on our walls to the fertilizers on our crops. Read on to find out more about this exciting product range.

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Features

Chemically inert synthetic amorphous silica. High purity
Available in hydrophilic and surface-treated hydrophobic grades
A wide range of surface areas available
Broad legislative approvals on many grades e.g. indirect food contact
Mixed fumed silica/metal oxide grades available

Benefits

Efficient rheology control in a wide range of simple and complex liquid systems. Imparts viscosity, pseudoplasticity and thixotropy. Stabilises pigments and prevents sagging.
Provides effective free flow and anti-caking behaviour. Can be used as a solid carrier for liquids.
Improves mechanical and optical properties of silicone rubber.
Improves anti-corrosion performance of protective and marine coatings. Reduces moistures sensitivity and increases hydrophobicity. Useful in silicone sealants for extending shelf life for example.
Anti-blocking agent for PET films.
Many more applications: greases, batteries, agrochemicals etc.

Typical Applications

Rheology and thixotropy control in coatings, inks, sealants & adhesives
Improving anti-corrosion properties of protective coatings
Scratch resistance in coatings
Thickening and hydrophobicity of greases
Electrolyte immobilization in lead-acid batteries
Anti-settling agent in pigment dispersions and suspension concentrates
Solid carrier for liquids
Mechanical and optical enhancement of silicone rubbers
Impart free-flow and anti-caking properties in powders
Metal and glass polishing

Also Used In

Adhesives & Sealants

Coatings

Composites

Construction

Graphic Arts

Health & Nutrition

Household

Industrial

Rubber

Thermoplastic Compounds

Thermoset