GB2416524A — Microcapsules with siloxane walls formed in situ
Assigned to Dow Silicones Corp · Expires 2006-02-01 · 20y expired
What this patent protects
A lipophilic cosmetic, chemical, biological or pharmaceutical active material composition is encapsulted by mixing it with a water reactive silicon compound and emulsifying the mixture in an aqueous medium under shear and in the presence of at least one surfactant, thereby formin…
USPTO Abstract
A lipophilic cosmetic, chemical, biological or pharmaceutical active material composition is encapsulted by mixing it with a water reactive silicon compound and emulsifying the mixture in an aqueous medium under shear and in the presence of at least one surfactant, thereby forming an aqueous suspension of microcapsules having a core of the active material composition surrounded by a shell of silicon-based network polymer. The polysiloxane shell is preferably made by condensation of a tetraalkoxy- or trialkoxy-alkylsilane such as tetraethoxysilane (TEOS). The preferred active material is a sunscreen.
Drugs covered by this patent
- Benzamycin (BENZOYL PEROXIDE) · Mayne Pharma
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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