Active ingredient patch for low-melting and/or volatile active i

Details Active ingredient patch for low-melting and/or volatile active i Active ingredient patch for low-melting and/or volatile active i

1995-06-07

1997-02-18

Phelan, D. Gabrielle

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Web, sheet or filament bases; compositions of bandages; or...

424449, A61F 1302

Patent

active

056039484

ABSTRACT:
A method of preparing a patch for the controlled release of readily available volatile active substances to the skin is disclosed. The patch comprises a back layer, and, bonded to the back layer, a water-insoluble adhesive film consisting of a pressure-sensitive fusion adhesive, plus a detachable film covering the adhesive film. The pressure-sensitive fusion adhesive contains a triple-block copolymer of polystyrene block copoly(ethylene/butylene) block polystyrene at a concentration of 10 to 80% by wt., and an active substance at a concentration of 2.5 to 25% by weight, which is a readily volatile liquid at the temperature at which the adhesive bonds.

REFERENCES:
patent: 4485077 (1984-11-01), Martinez
patent: 4668332 (1987-05-01), Ohnuki et al.
patent: 5032403 (1991-07-01), Sinnreich
patent: 5354597 (1994-10-01), Capik

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