The present invention relates to a novel
controlled release carrier system for pH or salt
triggered release and targeted delivery of fragrances and other active ingredients onto fabric, hair,
skin, and other biological surfaces and 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 the 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, certain components of the aforementioned compositions in combination with one another 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 the
controlled release system of the present invention.