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Patent Pick: Multilayer Fragrance Delivery

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Multilayered core/shell microcapsules for fragrance delivery
United States Patent Application 20150250689
Publication date: Sept. 10, 2015
Assignee: Firmenich SA

This patent describes a method of making multilayer core/shell microcapsules to deliver fragrance components of perfume oils. An outer shell is formed by coacervation of a surrounding internal phase containing the active. 

The inner shell is formed by interfacial polymerization at the interface between the internal phase and outer shell. The microcapsules are typically incorporated in a consumer product, wherein the multilayer shell prevents the active agent from release until desired; generally during use of the product.

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