Active ingredient patch for low-melting and/or volatile active ingredients
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United States of America Patent
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Jun 18, 1996
Grant Date -
N/A
app pub date -
Feb 27, 1995
filing date -
Jul 23, 1992
priority date (Note) -
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Abstract
The invention concerns a patch for the controlled release of readily available 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., 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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