Plaster having adjustable occlusion

US9180103B2 · kind B2 · utility

Assignee

• LTS Lohmann Therapie-Systeme AG · DE

Inventors

• Walter Muller · Neuwied, DE
• Patrick Mohr · Mims, US

Key dates

• Filing date: Sep 25, 2012
• Grant date: Nov 10, 2015
• Expiry date: Sep 25, 2032

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L2300/41
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Transdermal or topical plasters containing active ingredient are provided that include a non-occlusive back layer, a matrix formed from of one or more polymer layers having at least one pharmaceutical active ingredient in one or more of the layers, in which the structure-forming base polymers of the layer(s) are non-occlusive or only slightly occlusive and a second polymer that has a low water-vapor permeability and that is immiscible or only very slightly miscible with the base polymer is dispersed in at least one of the polymer layers.