Thermally Insulating Aerogel Based Rendering Materials
AssigneesFixit AG, Empa EidgenöSsische MaterialprüFungs- Und Forschungsanstalt
InventorsThomas Stahl, Samuel Brunner, Mark Zimmermann, Matthias Koebel
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Abstract
In order to produce a high performance thermally insulating rendering, a dry blend is provided that consists essentially of: —60 to 90 Vol.-% of a hydrophobized granular silica aerogel; —0.5 to 30 Vol.-% of a purely mineral binder; —0.2 to 20 Vol.-% of an open-porous water-insoluble or slowly water soluble additive having an accessible pore volume from 10 to 90 Vol.-%—up to 5 Vol.-% reinforcing fibers; and—up to 5 Vol.-% of processing additives. After mixing the dry blend with water, the slurry thus formed can be applied to a surface or shaped to a self-supporting body using an overpressure without adversely affecting the thermal insulation properties.
Claims20
A dry blend for producing a thermally insulating rendering, consisting essentially of:
- 60 to 90 Vol.-% of a hydrophobized granular silica aerogel;
- 0.5 to 30 Vol.-% of a purely mineral binder;
- 0.2 to 20 Vol.-% of an open-porous water-insoluble or slowly water soluble additive having an accessible pore volume from 10 to 90 Vol.-%;
- up to 5 Vol.-% reinforcing fibers;
- and
- up to 5 Vol.-% of processing additives.
A self-supporting, thermally insulating rendering, consisting essentially of:
- 60 to 90 Vol.-% of a hydrophobized granular silica aerogel;
- 0.5 to 30 Vol.-% of a hardened purely mineral binder;
- 0.2 to 20 Vol.-% of an open-porous water-insoluble or slowly water soluble additive having an accessible pore volume from 10 to 90 Vol.-%;
- up to 5 Vol.-% reinforcing fibers;
- and
- up to 5 Vol.-% of processing additives;
- characterized in that said rendering element has a thermal conductivity not exceeding 38 mW m−1 K−1.
Dependencies are inferred from the claim text.