Hydrophilic, elastomeric, pressure-sensitive adhesive
First Claim
1. An electroconductive, water-insoluble, hydrophilic, elastomeric pressure-sensitive adhesive comprising a gel of polyvinylpyrrolidone cross-linked by ionizing radiation, a polyalkylene glycol plasticizer, water and a salt selected from ammonium acetate, magnesium acetate or magnesium sulfate,wherein said cross-linked gel is formed by irradiation of a solution or dispersion of said salt and said polyvinylpyrrolidone in said water and said plasticizer;
- andwherein said cross-linked gel retains said plasticizer within a cross-linked three-dimensional matrix of said polyvinyl pyrrolidone.
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Abstract
The present invention concerns a novel water-insoluble, hydrophilic, pressure-sensitive adhesive that has a number of unique characteristics including being elastomeric and ultraconformable. This adhesive includes an irradiation cross-linked synthetic organic polymer having a three-dimensional matrix, and an adhesive plasticizer. The plasticizer includes a substantially non-volatile elasticizer. The adhesive is useful either as a coating on a supporting web-like substrate or as a self-supporting layer. Also provided are various articles made using the adhesive such as a bandage or ostomy device, a method of making the adhesive, and methods of using the adhesive.
In one embodiment, the adhesive is electroconductive, and is useful for attaching an electrically conductive member of an electrode to a selected surface such as mammalian tissue. Also provided is an electrode having a layer of this adhesive, and a method of adhering this electrode to mammalian tissue.
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Citations
13 Claims
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1. An electroconductive, water-insoluble, hydrophilic, elastomeric pressure-sensitive adhesive comprising a gel of polyvinylpyrrolidone cross-linked by ionizing radiation, a polyalkylene glycol plasticizer, water and a salt selected from ammonium acetate, magnesium acetate or magnesium sulfate,
wherein said cross-linked gel is formed by irradiation of a solution or dispersion of said salt and said polyvinylpyrrolidone in said water and said plasticizer; - and
wherein said cross-linked gel retains said plasticizer within a cross-linked three-dimensional matrix of said polyvinyl pyrrolidone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrosurgical return electrode comprising an electrically conductive member in electroconducting association with an electroconductive pressure-sensitive adhesive coated on a web-like substrate and adapted to attach said member to mammalian skin,
said adhesive being a radiation cross-linked gel comprising about 20 percent by weight of K-90 polyvinyl pyrrolidone, about 25 percent by weight of polyethylene glycol having a molecular weight of about 300, about 5 percent by weight of magnesium acetate, and about 50 percent by weight of water.
Specification