Nanoemulsions

A - Human Necessities – 61 – K

Patent

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Details

A61K 47/44 (2006.01) A61K 9/113 (2006.01)

Patent

CA 2706517

The present invention relates to oil-in-water nanoemulsions, processes for their preparation and their use as delivery vehicles for active components for use in opthalmological, dermatological, food, cosmetic, pharmaceutical, agrichemical, textile, polymer and chemical applications. The oil-in-water nanoemulsion comprises up to 40 volume % of an oil phase comprising at least 50 volume % of a triglyceride having a fatty acid chain length of 12 carbon atoms or greater and a hydrophilic non-ionic surfactant having a hydrophilic-lipophilic balance (HLB) greater than 7; and an aqueous phase, in which the oil droplets have an intensity average size of less than 100 nm and the ratio of surfactant to oil is less than 1:1, more preferably 0.2 to 0.8:1.

La présente invention concerne des nanoémulsions huile dans eau, leurs procédés de préparation et leur utilisation en tant que supports d'administration de principes actifs utilisables dans des applications ophtalmologiques, dermatologiques, alimentaires, cosmétiques, pharmaceutiques, agrochimiques, textiles, polymères et chimiques. La nanoémulsion huile dans eau comprend jusqu'à 40 % en volume d'une phase huileuse comprenant au moins 50 % en volume d'un triglycéride dont les chaînes d'acides gras comportent au moins 12 atomes de carbone et un tensioactif hydrophile non ionique dont l'équilibre hydrophile-lipophile est supérieur à 7 ; ainsi qu'une phase aqueuse, la taille moyenne des gouttelettes d'huile étant inférieure à 100 nm et le rapport entre le tensioactif et l'eau est inférieur à 1/1 et, de façon encore préférée, à 0,2 à 0,8/1.

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