Patent ID: 6063398
Filing Date: 2000-05-16
Classification: A61K,A61Q

Abstract:
A cosmetic or dermopharmaceutical patch comprising at least one cosmetically or pharmaceutically active compound, which is unstable in an oxidizing media, said patch comprising a support layer on which an anhydrous storage layer is attached, said storage layer being formed from a hydrophobic polymer selected from the group consisting of a silicone polymer and a polyester or polyether polyurethane, said storage layer containing particles of the active compound, which is unstable in said oxidizing media, together with particles of at least one water-absorbing agent selected from the group consisting of superabsorbent cross-linked polyacrylates, polyvinyl alcohol, carboxyvinyl polymers, semi-synthetic cellulose derivatives, starches, guar gum, gum arabic, gum tragacanth, casein, phytocolloids, cotton fibers and gelatin, said particles having an average size of between 0.2 .mu.m and 1.5 mm and being homogeneously dispersed within the storage layer, said storage layer being compact and homogeneous and said patch being optionally protected with a protective layer.