Hollow silica particles, compositions comprising them, and methods for making same
US9278866B2 · kind B2 · utility
2Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2005 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Jul 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods for making and compositions comprising hollow silica particle are disclosed, said particles made 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. 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.