| abstract |
The present invention relates to a novel controlled release carrier system f or pH or salt triggered release and targeted delivery of fragrances and other active ingredients onto fabric, hair, skin, and other biological surfaces an d which provides prolonged release of fragrances and other active ingredients over an extended period of time, or yields a high impact fragrance "burst" upon treating the target surface with heat (blow drying the hair, ironing th e fabric). The controlled delivery system of the present invention is substantially a free-flowing powder formed of solid hydrophobic nano-spheres comprising the fragrance and other active ingredients that are encapsulated in a pH or salt sensitive micro-spheres. Also described are processes for preparing such compositions and processes for using same. Furthermore, certa in components of the aforementioned compositions in combination with one anothe r are novel, and other components have novel uses in increasing fragrance substantivity, particularly in fabric, hair, and skin care preparations. The invention further pertains to consumer and diversified products comprising t he controlled release system of the present invention. |