Targeted controlled delivery compositions activated by...

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 17/00 (2006.01) A61K 8/04 (2006.01) A61K 9/16 (2006.01) A61K 9/50 (2006.01) A61Q 13/00 (2006.01) C11D 3/00 (2006.01) C11D 3/37 (2006.01) C11D 3/50 (2006.01) C11D 11/00 (2006.01)

Patent

CA 2482225

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.

L'invention concerne un nouveau système de support à libération contrôlée permettant une libération déclenchée par le pH ou le sel, et l'administration ciblée de parfums et d'autres ingrédients actifs sur les textiles, les cheveux, la peau et d'autres surfaces biologiques, et qui assure une libération prolongée de parfums et d'autre ingrédients actifs au cours d'une longue période de temps, ou permet la libération d'une puissante bouffée de parfum lorsque la surface cible est traitée à chaud (séchage des cheveux, repassage). Ce système de libération contrôlée est principalement une poudre fluide formée de nanosphères hydrophobes solides contenant un parfum ou d'autres ingrédients actifs, qui sont encapsulées dans des microsphères sensibles au pH ou au sel. L'invention concerne également des procédés permettant de préparer de telles compositions et des procédés d'utilisation de celles-ci. L'invention concerne en outre les nouvelles combinaisons de certains composants des compositions décrites, ainsi que les nouvelles utilisations d'autres composants pour le renforcement de la substantivité, en particulier dans les préparations d'entretien des textiles, et de soins des cheveux et de la peau. L'invention concerne en outre des produits de consommation et des produits diversifiés contenant le système de libération contrôlée décrit.

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