Water vapor permeable, pressure sensitive adhesive composition
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsGerrit H. Brunsveld, Johannes T. Minnigh
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Abstract
A water vapor permeable, pressure sensitive adhesive composition comprising a hydrophilic, all acrylic polymer system, free of additives and having enhanced water vapor transmission which contains a significant high amount of hydroxyalkyl acrylate/methacrylate. This adhesive composition is particularly useful in surgical or medical dressing applications.
Claims8
A surgical or medical dressing comprising a backing material coated with a continuous water vapor permeable, pressure sensitive adhesive composition comprising a polymer derived from monomes consisting essentially of:
- a) from about 50 to 80% by weight of alkyl acrylate or methacrylate wherein the alkyl group contains from about 4 to 12 carbon atoms;
- b) from about 20 to 40% by weight of hydroxyalkyl acrylate or methacrylate wherein the alkyl group contains from about 2 to 4 carbon atoms;
- c) from about 0 to 35% by weight of alkyl acrylate or methacrylate wherein the alkyl group contains from about 1 to 3 carbon atoms;
- d) from about 0 to 10% by weight of glycidyl acrylate or methacrylate;
- and
- e) from about 0 to 10% by weight of acrylic acid, the dressing laving a water vapor transmission rate of at least 1000 liters vapor/m2/24 hours at 40° C. and 80% relative humidity difference.
Dependencies are inferred from the claim text.