| abstract |
The present invention relates to a process for the production of multilayer core / shell microcapsules for the delivery of active ingredients, for example fragrance ingredients of perfume oils. The method includes forming an outer shell by coacervation around an inner phase containing an active agent and forming an inner shell by interfacial polymerization at the interface between the inner phase and the outer shell. The internal phase contains an active agent. The microcapsules are typically incorporated into consumer products, where the multi-layer shell generally prevents the active agent from being released until desired during use of the consumer product. |