Hollow silica particles, compositions comprising them and methods for making same
US9469545B2 · kind B2 · utility
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1References
11Claims
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Assignee
Inventors
Key dates
| Filing date | Jun 11, 2015 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Jun 11, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods for making comprising hollow silica particles from a composition comprising a silicon-containing compound selected from the group consisting of tetraalkoxysilanes, trialkyloxysilanes and derivatives thereof, dialkoxysilanes and derivatives thereof, alkoxysilanes and derivatives thereof, silicone oligomers, oligomeric silsesquioxanes and silicone polymers distributed over a polymer template core that is eliminated from the particle in a two-stage heating process. The particles of the present invention have a substantially uniform particle size and exhibit low permeability to liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.