Method for producing a porous SiO2-xerogel with a characteristic pore size by means of a bottom-up method using a precursor that has organic solid skeletal supports

US9266743B2 · kind B2 · utility

Assignees

• BSH Hausgeräte GmbH · DE
• Bayerisches Zentrum für Angewandte Energieforschung e. V. · DE

Inventors

• Hans-Peter Ebert · Lechenich, DE
• Theresa Noisser · Coburg, DE
• Gudrun Reichenauer · Gerbrunn, DE
• Lena Weigold · Coburg, DE

Key dates

• Filing date: Nov 19, 2010
• Grant date: Feb 23, 2016
• Expiry date: Jul 18, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J9/28
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a method for producing a porous SiO2-xerogel starting solution containing a silicon compound is provided and organic monomers and an organically modified alkoxysilane are added to the starting solution. During gelification of the silicon compound, the organic monomers and the organically modified alkoxysilane react in situ to form organic solid skeletal supports in the silicon network. The resulting gel is dried under subcritical conditions and the solid skeletal supports removed by thermal oxidation.