Patch with reduced cold flow
AssigneeNovosis AG
InventorsWilfried Fischer, Hubert Kaffl, Petra Huber, Clifton Zimmermann
Life of this patent
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Abstract
The present invention refers to a flat self-adhering plaster having a multi-layer construction and reduced cold flow, characterized in that the layer of adhesive possesses a core of adhesive being a flowable adhesive and a ring of adhesive being an adhesive having reduced flowability which surrounds the core.
Claims9
A flat self-adhering plaster having reduced cold flow, consisting of a cover, a layer of adhesive which attaches to skin having a core of adhesive made flowable by a plasticizing additive, a ring of adhesive free of a plasticizing additive, wherein the adhesive of said ring has a reduced flowability and stronger cohesion to skin to that of said core, wherein said ring surrounds said core, and wherein said core is the only pharmaceutical or cosmetic active agent area, and a removable carrier.
A flat self-adhering plaster having reduced cold flow, consisting of a layer of adhesive adapted to attach to skin and comprising a core of flowable adhesive comprised of a polymer or a mixture of polymers, and a ring of adhesive being an adhesive having reduced flowability to that of the core, wherein said ring of adhesive is comprised of a different polymer or different mixture of polymers from that of said core, and wherein said ring surrounds said core.
Dependencies are inferred from the claim text.