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| Wacker HDK N 20ST |
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WACKER HDK N 20ST Fumed Silica is a hydrophilic fumed silica produced by flame hydrolysis of volatile silcon compounds. WACKER HDK N 20ST is pure, xray amorphous silicon dioxide (SiO2).
* Thickener, thixotropic agent and antisettling agent for liquid systems, polyester, coatings, paints, lacquers and varnishes, PVC-plastisols, pharmaceutical and cosmetic products, fluids and lubricants, and tile adhesives
* Reinforcing filler in silicone rubber
* Free-flow agent for powders, pigments and salts |
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Surface area, m2/g : 200¡¾30
SiO2-Content, % (Dried for 2 hr/1000'C): >99.8
Tamped Bulk density, g/l : ca. 40
Moisture, %, 2 hr/105'C(Material when leaving the plant site) : <1.5
Loss on Ignition, %, 2 hr/1000'C(Dried for 2 hr/105'C) : <1.5
pH-Value (4% dispersion in water): 3.8 - 4.3
Sieve Residue, %,>40micronm : <0.04
HCI-Content, % (Dried for 2 hr/1000'C): <0.02
Al2O3-Content, % (Dried for 2 hr/1000'C): <0.05
Fe2O3-Content, %(Dried for 2 hr/1000'C) : <0.005
TiO2-Content, % (Dried for 2 hr/1000'C): <0.003 |
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