Wirkstoffpflaster für niedrigschmelzende und/oder flüchtige Wirkstoffe und Verfahren zu seiner Herstellung
The invention concerns a patch for the controlled release of readily volatile active substances to the skin, the patch comprising a back layer and, bonded to it, a water-insoluble adhesive film consisting of a pressure-sensitive fusion adhesive, plus a detachable film covering the adhesive film. The...
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Zusammenfassung: | The invention concerns a patch for the controlled release of readily volatile active substances to the skin, the patch comprising a back layer and, bonded to it, a water-insoluble adhesive film consisting of a pressure-sensitive fusion adhesive, plus a detachable film covering the adhesive film. The patch is characterized in that the pressure-sensitive fusion adhesive contains a triple-block copolymer of polystyrene block copoly(ethylene/butylene) block polystyrene (SEBS) at a concentration of 10 to 80 % by wt., preferably 20 to 40 % by wt., and an active substance which, at the temperature at which the adhesive bonds, is a readily volatile liquid and which is present at a concentration of 2.5 to 25 % by wt. |
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