Cosmetic particulate gel carriers for topically applied...

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/73 (2006.01) A61Q 19/00 (2006.01)

Patent

CA 2289041

Crushable gel beads (10) formed of an agar complex provide novel cosmetic, pharmaceutical, etc. delivery vehicles for topical delivery of biologically or cosmetically active agents. Preferred agar beads (10) are complexes of a continuous phase of agar gel (12) in a self-supporting solid or semi-solid form with a restraining polymer (14). Entrapped in and dispersed randomly throughout each agar bead (10) is a water-soluble, preferably polar, restraining polymer (14), preferably a quaternized cationic polymer, such as polyquaternium (24) or steardimonium hydroxyethylcellulose. Various active agents (16) may be bound to restraining polymer (14), for example ascorbic acid, lactic acid or papain. Methods of manufacture are also described.

Des billes (10) de gel écrasables formées d'un complexe d'agar constituent de nouveaux excipients d'administration cosmétique, pharmaceutique etc., permettant l'administration locale d'agents actifs du point de vue biologique ou cosmétique. Les billes (10) d'agar préférées sont des complexes d'une phase continue d'un gel (12) d'agar sous une forme solide ou semi-solide autonome avec un polymère de restriction (14). Un polymère de restriction (14) hydrosoluble et de préférence polaire est piégé et dispersé de manière aléatoire dans chaque bille (10) d'agar, de préférence un polymère cationique quaternisé tel qu'une polyquaternium (24) ou stéardimonium hydroxyéthylcellulose. Divers agents actifs (16) peuvent être liés au polymère de restriction (14), par exemple de l'acide ascorbique, de l'acide lactique ou de la papaïne. L'invention concerne également des procédés de production.

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