Silica aerogel with increased alkaline stability
AssigneeEvonik Operations GmbH
InventorsUwe Numrich, Stefan Bade, Nicolas Marion, Matthias Koebel, Wim Malfait, Stefanie Hauser, Nicolas Vogel
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Abstract
The present invention relates to a process for producing a hydrophobized silica aerogel, comprising the following steps: a) preparing a hydrophobized silica gel comprising alkoxy groups; b) drying of the hydrophobized silica gel obtained in step a); c) treatment of the product obtained in step b) with a gas mixture comprising water and a base or an acid. A hydrophobized silica aerogel with a reduced alkoxy group content, suitable for thermal insulation applications, is also provided.
Claims17
A process for producing a hydrophobized silica aerogel, comprising the following steps:
- a) preparing a hydrophobized silica gel comprising alkoxy groups;
- b) drying the hydrophobized silica gel obtained in step a);
- c) treating the hydrophobized silica gel dried in step b) with a gas mixture comprising water and a base or an acid.
Dependencies are inferred from the claim text.