Microcapsules from emulsion polymerization of tetraalkoxysilane
US8435559B2 · kind B2 · utility
1Cited by
18References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | May 26, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/412
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process is disclosed for preparing microcapsules having a shell thickness of at least 18 nanometers by polymerizing a tetraalkoxysilane at the oil/water interface of an emulsion containing 0.1 to 0.3 weight percent of a cationic surfactant. The microcapsules are useful to prepare encapsulated sunscreens having sufficient robustness to prevent leakage of the encapsulated sunscreen in a formulated composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.