Fumed silica grades (hydrophilic Aerosil 200 and hydrophobic R202), fine white powders used as thickeners, anti-caking and rheology control additives.
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Aerosil 200 and R202 are fumed (pyrogenic) silicas, extremely fine, light white powders with very high specific surface area. Aerosil 200 is hydrophilic, while R202 is surface-treated to be hydrophobic, and both strongly influence flow and thickening at low dosage.
Typical applications include:
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