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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±30
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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