Microporous thermal insulation molding containing electric-arc silica
AssigneeWacker Chemie AG
InventorsThomas Eyhorn, Andreas Rell
Life of this patent
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Abstract
A thermal insulation molding having a density of 150-500 kg/m3, includes a thermal insulation material, containing 5-75% by weight of pyrogenic silica (HDK), 5%-50% by weight of electric-arc silica, 5%-50% by weight of opacifier, wherein the electric-arc silica has a bulk density of <200 kg/m3, a carbon content of <0.1% by weight, an alkali metal oxide content of <0.2% by weight, an alkaline-earth metal oxide content of <0.3% by weight, an SO3 content of <0.05% by weight and a specific surface area of >30 m2/g.
Claims11
A thermal insulation molding having a density of 150 to 500 kg/m3, comprising
- a thermal insulation material, containing 5%-75% by weight of pyrogenic silica (HDK), 5% to 50% by weight of electric-arc silica, 5% to 50% by weight of opacifier, wherein the electric-arc silica has a bulk density of <200 kg/m3, a carbon content of <0.1% by weight, an alkali metal oxide content of <0.2% by weight, an alkaline-earth metal oxide content of <0.3% by weight, an SO3 content of <0.05% by weight and a specific surface area of >30 m2/g;
- and
- wherein each percent by weight is based upon the total weight of the thermal insulation molding.
A process for producing a thermal insulation molding
- having a density of 150 to 500 kg/m3, which comprises the following process steps:
- compressing a thermal insulation mixture of material, containing 5%-75% by weight of pyrogenic silica (HDK), 5% to 50% by weight of electric-arc silica, 5% to 50% by weight of opacifier, wherein the electric-arc silica has a bulk density of <200 kg/m3, a carbon content of <0.1% by weight, an alkali metal oxide content of <0.2% by weight, an alkaline-earth metal oxide content of <0.3%, by weight, an SO3 content of <0.05% by weight and a specific surface area of >30 m2/g;
- producing a compressed body having a resulting shape at a pressure of 8 to 20 bar, with the thickness of the compressed body being 10 to 35 mm;
- and
- wherein each percent by weight is based upon the total weight of the thermal insulation molding.
Dependencies are inferred from the claim text.