PREPARATION OF AN EMULSION COMPRISING LAMELLAR LIQUID CRYSTAL (LLC) PARTICLES CONTAINING FRAGRANCE

摘要

A process of preparing an emulsion comprising lamellar liquid crystal (LLC)-particles containing a fragrance by (a) blending the fragrance with emulsifiers capable of forming liquid-crystalline structures, at least one fatty alcohol co-emulsifier having at least 22 carbon atoms, an amphiphilic reinforcing material, and a wax with a needle penetration hardness of greater than 7 mm @25°C, the ratio of wax to amphiphilic reinforcing agent being from about 1:49 to about 1:2.; and (b) adding water slowly to the fragrance mixture thus formed and mixing under shear conditions for a sufficient time to obtain a stable emulsion and continuing to cool to room temperature whilst mixing. The resulting emulsions can be easily incorporated into surface conditioning products (e.g., shampoos and fabric conditioners), are resistant to manufacturing processing conditions and give a long-lasting fragrance delivery.