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US 8,163,080 B2Granted
Fumed silanized and ground silica
AssigneeEvonik Degussa GmbH
InventorsJuergen Meyer, Kurt Spitznagel, Guenther Michael, Tina Gross
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Abstract
The invention relates to a hydrophobic fumed silica which is obtained by grinding a fumed silica which, as a result of silanization, has trimethylsilyl groups fixed on the surface; and to coating formulations comprising this silica.
Claims11
A ground hydrophobic fumed silica comprising a fumed silica which has trimethylsilyl groups present on the surface, wherein the ground hydrophobic fumed silica has
- a tamped density of from 10 to 65 g/l;
- a specific BET surface area of from 210 to 225 m2/g;
- and
- a grindometer value of 12 μm or less for a dispersion time of 30 minutes or a value of less than 10 μm for a dispersion time of 60 minutes.
1 more element
Dependencies are inferred from the claim text.