Method of hydrophobing silica
US4950502A · kind A · utility
26Cited by
20References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | May 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of producing hydrophobic colloidal silica is disclosed. The method comprises combining an aqueous colloidal silica dispersion, polyorganosiloxane, and anionic surfactant to yield a stable aqueous emulsion of hydrophobic colloidal silica. The emulsion may be further processed by evaporating the water to yield a white material which may be easily ground to a fine powder of hydrophobic colloidal silica. This powder is useful as a reinforcement for silicone rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.