Hot melt adhesives for medical application
Pressure sensitive UV hot melt acrylic compositions useful for articles such as plasters, bandages and tapes which are adhesively adhered to the skin.
1 . A pressure sensitive adhesive for use in medical applications comprising a UVcurable polymer and a hydrocarbon resin tackifier.
2 . The adhesive of claim 1 wherein the UV curable polymer is a UV curable acrylic polymer.
3 . The adhesive of claim 2 wherein the UV curable acrylic polymer comprises a covalently bonded photoinitiator.
4 . The adhesive of claim 2 wherein the UV curable acrylic polymer comprises 2-ethylhexyl acrylate.
5 . The adhesive of claim 4 wherein the tackifying resin is an aromatic hydrocarbon resin.
6 . The adhesive of claim 5 wherein the hydrocarbon resin is an alpha methyl styrene resin having a softening point of less than about 110° C.
7 . An article to be adhesively adhered to the skin, which article comprises a backing substrate having coated to at least one surface thereof an adhesive comprising a UV curable polymer and a hydrocarbon resin tackifier.
8 . The article of claim 7 which is a tape, a plaster, a bandage, or a drug delivery device.
9 . The article of claim 8 wherein the UV curable polymer is a UV curable acrylic polymer.
10 . The article of claim 9 wherein the UV curable acrylic polymer comprises a covalently bonded photoinitiator.
11 . The article of claim 10 wherein the UV curable acrylic polymer comprises 2-ethylhexyl acrylate.
12 . The article of claim 11 wherein the tackifying resin is an aromatic hydrocarbon resin.
13 . The article of claim 12 wherein the hydrocarbon resin is an alpha methyl styrene resin having a softening point of less than about 110° C.
14 . The article of claim 13 which is a transdermal drug delivery system.
15 . The article of claim 13 which is a medical tape.
16 . A method of administering a therapeutic agent to a patient comprising applying to a body surface of the patient a transdermal drug delivery system comprising a UV curable hot melt pressure sensitive adhesive and a physiologically active agent.
17 . The method of claim 16 wherein the adhesive comprises a UV curable acrylic polymer and a hydrocarbon tackifier.
18 . The method of claim 17 where the tackifier is an alpha methyl styrene resin having a softening point of less than about 110° C.