Process for the preparation of monolithic silica aerogels
US5795557A · kind A · utility
26Cited by
7References
10Claims
0Family size
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Key dates
| Filing date | Jul 3, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Jul 3, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the preparation of a silica aerogel that includes subjecting a mixture that includes an organosilicon compound and ethyl acetoacetate to hydrolysis and polycondensation in an acidic medium to obtain a transparent gel. The organic solvent is substituted by liquid carbon dioxide and the carbon dioxide is evacuated under supercritical conditions of the carbon dioxide to obtain an aerogel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.