Synthetic, hydrophilic, amorphous silica, produced via flame hydrolysis. Standard product for industrial applications.
All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product's fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence. This disclaimer of warranty and liability also applies particularly in foreign countries with respect to third parties' rights.
HDK® N20ST is applied as a thickening and thixotropic agent in many organic systems, e.g. in unsaturated polyesters, coatings, printing inks, adhesives, cosmetics and others. HDK® N20ST shows a lower thickening activity compared to HDK® N20.
HDK® N20ST is not suitable for pharmaceuticals, food and feed.
A good dispersion of HDK® N20ST is a must to assure optimum performance.
More detailed information about the application and processing of HDK® N20ST is available in our HDK-brochures and on the WACKER web site.
HDK® N20ST is offered in following packaging:
- pallet with paper bags: 10 kg bags
- Big bags: 150 kg (big bags on pallets)
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|BET surface||Loss on drying||pH||Sieve residue||Tamped density|
|HDK® N20P||175 - 225 m²/g 175 - 225 m²/g||< 1.5 % < 1.5 %||3.8 - 4.3 3.8 - 4.3||< 0.03 % < 0.03 %||approx. 100 g/l approx. 100 g/l|
|HDK® N20ST||175 - 225 m²/g 175 - 225 m²/g||< 1.5 % < 1.5 %||3.8 - 4.3 3.8 - 4.3||< 0.03 % < 0.03 %||approx. 40 g/l approx. 40 g/l|
 BET surface | DIN ISO 9277 DIN 66132,  Tamped density | DIN EN ISO 787-11,  pH | DIN EN ISO 787-9 | in 4 % dispersion (1 : 1 mixture of water-methanol),  Sieve residue | DIN EN ISO 787-18 | acc. to Mocker > 40 µm,  Loss on drying | DIN EN ISO 787-2 | ex works (2 h at 105 °C)