US Patent 7235261 Controlled release encapsulation

This invention relates to a controlled release encapsulated dry powder that is formed by an emulsion comprising: A) a fully hydrolyzed polymer, B) a hydrophobic silica, C) a modified corn starch, and D) at least one fragrance oil, which is emulsified in water and spray dried to evaporate the water obtaining the encapsulated dry powder. This invention also relates to a process for the preparation of a controlled release encapsulated dry powder that is formed by an emulsion, which is spray dried. The controlled release encapsulated dry powder is used in deodorant and antiperspirant applications.