Encapsulation of personal care actives
US9278055B2 · kind B2 · utility
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1References
10Claims
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Key dates
| Filing date | Oct 16, 2012 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Oct 16, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/56
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Described are methods for encapsulating a personal care active, comprising preparing an aqueous phase, comprising partially hydrolyzed polyvinyl alcohol and a cosmetically acceptable non-ionic surfactant, preparing an oil phase, comprising the personal care active and isocyanate or polyisocyanate, homogenizing the aqueous phase and oil phase to form an emulsion with particles less than one micron, and forming a dispersion of polyurea core-shell particles containing the personal care active by contacting the emulsion with an aqueous amine solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.