Silica sol and method for producing the same
US8053479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2007 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Mar 3, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K3/1463
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention provides a high-purity, high-concentrated silica sol with long-term stability and low viscosity by preventing viscosity-increase after production, and method for producing the same. In one embodiment, the silica sol produced by an alkoxide method comprises at least a dispersing agent and silica, wherein the concentration of said dispersing agent is 10-3000 ppm with respect to the silica, wherein said dispersing agent may be an inorganic acid, inorganic acid salt, organic acid or organic acid salt whose degradation temperature and boiling point are both 60° C. or higher, wherein said silica sol has a silica concentration of 20% weight or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.