Patent ID: 9266743
Filing Date: 2016-02-23
CPC Classification: C01B,C08J

Claim Text:
1. A method for producing SiO 2 xerogel comprising the steps of: providing a starting solution containing a silicon compound, the silicon compound comprising at least one of a sodium silicate, a silica, a layered silica, an alkoxysilane and a modified alkoxysilane; adding organic monomers, the organic monomers being soluble or dispersible in a polar protic solvent, and organically modified alkoxysilanes having the general formula R allowing the silicon compound to gelify, thereby forming a gel with an SiO drying the gel under subcritical conditions at 1 bar to result in a temporary content by volume of the organic particles between 10% and 60%; and subjecting the gel to a heat treatment in excess of 300° C. whereby the xerogel has pores having a size from 1000 nm to 50 nm, a density of less than 400 kg/m