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US 6,190,689 B1Granted
Hydrophilic pressure sensitive hot-melt adhesives
AssigneeLTS Lohmann Therapie-Systeme AG
InventorsHans-Rainer Hoffmann, Michael Roreger
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Abstract
A device for the release of substances from pressure sensitive hot-melt adhesives with a uniform or non-uniform distribution of said substances is characterized by the fact that the pressure sensitive hot-melt adhesive is hydrophilic and comprises at least one water-soluble, or at least water-swellable, polymer, at least one water-soluble, meltable adhesive resin, as well as substance to be released.
Claims24
A self-adhesive product for application to intact skin which comprises
- a water-free pressure sensitive adhesive for the release of a substance to or through the skin, and
- a substance to be released, said substance being distributed within said pressure sensitive adhesive,
- wherein said pressure sensitive adhesive is a pressure sensitive hot-melt adhesive prepared by melt mixing at a temperature of between 40 and 150° C. a mixture comprising
- at least one water-soluble or water-swellable polymer, and
- at least one water-soluble meltable adhesive resin.
2 more elements
Dependencies are inferred from the claim text.