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Wacker HDK H 30 |
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Fumed Silica WACKER HDK H 20 Fumed Silica is a hydrophobic fumed silica formed by a chemical reaction of hydrophilic WACKER HDK with organosilanes. Hydrophilic fumed silica is produced by flame hydrolysis of volatile silicon compounds. H 30 is pure, x-ray amorphous silicon dioxide (SiO2). * Free-flow agent for moisture sensitive substances * Reinforcing filler and thickening agent for RTV-1 silicone rubber and polysulfides * Anti-settling agent for paints and lacquers. * Reinforcing filler for HTV silicone rubber |
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Surface area, m2/g : 250¡¾30 SiO2 Content, %, (Dried 2hr/1000'C) : >99.8 Tamped Bulk density, g/l, approx : 40 Moisture, 2 hr/105'C (Material when leaving the plant site) : <0.6 Loss on Ignition, 2 hr/1000'C, (Dried for 2hr/105'C) : <2.0 pH-Value, [4% dispersion in water: methanol (1:1)] : 4.0 - 4.8 Sieve residue, 40micronm : <0.05 HCI Content, (Dried 2hr/1000'C) : <0.05 Al2O3 Content, (Dried 2hr/1000'C) : <0.05 Fe2O3 Content, (Dried 2hr/1000'C) : <0.005 TiO2 Content, (Dried 2hr/1000'C) : <0.003 C-Content, (Dried 2hr/105'C) : <2.2 |
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