US4699146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic, elastomeric, pressure-sensitive adhesive
Assignee: Covidien AG
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Filing: 1985-09-12
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Granted: 1987-10-13
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Expires: 2005-09-12
Abstract
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.
Inventors
- 👤 David L. Sieverding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/0404; A61N1/0408; A61N1/0468; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/58; A61L24/00; A61L24/04; A61L24/06; A61N1/0456; A61N1/0472; A61N1/0492; A61N1/0496; C; C09; C09J; C09J157/00; C09J7/00; C09J7/10; C09J7/20; C09J7/21; C09J7/30; C09J7/38; A61L2400/00; A61L2400/14; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/28; C08L2666/54; C09J2301/00; C09J2301/30; C09J2301/302
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
75 words
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.
Claim 2
Dependent Claim
75 words
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.
Claim 3
Dependent Claim
25 words
The adhesive of claim 1 wherein said plasticizer is present in an amount ranging from about 0.5 to 4 times the weight of said polymer.
Claim 4
Dependent Claim
11 words
The adhesive of claim 1 wherein said salt is magnesium acetate.
Claim 5
Dependent Claim
11 words
The adhesive of claim 1 wherein said plasticizer is polyethylene glycol.
Claim 6
Dependent Claim
17 words
The adhesive of claim 4 wherein said glycol has a molecular weight of about 300 or 600.
Claim 7
Dependent Claim
26 words
The adhesive of claim 5 wherein said glycol is present in an amount that is from about 0.75 to 1.5 times the weight of said pyrrolidone.
Claim 8
Dependent Claim
53 words
The adhesive of claim 1 wherein the said solution or dispersion comprises (a) about 18 to 22 percent by weight of polyvinyl pyrrolidone, (b) about 25 percent by weight of polyethylene glycol having a molecular weight of about 300, (c) about 5 to 7 percent by weight of magnesium acetate, and (d) water.
Claim 9
Dependent Claim
25 words
An electrode comprising an electrically conductive member and the electroconductive adhesive of claim 1, said adhesive being adapted to attach said member to mammalian skin.
Claim 10
Dependent Claim
22 words
The electrode of claim 8 which comprises an electrosurgical return electrode, a transcutaneous electrical nerve stimulation electrode or an EKG monitoring electrode.
Claim 11
Dependent Claim
11 words
The electrode of claim 8 which comprises an electrosurgical return electrode.
Claim 12
Dependent Claim
15 words
The electrode of claim 8 wherein said electroconductive adhesive is coated on a web-like substrate.
Claim 13
Dependent Claim
79 words
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.
Claim 14
Dependent Claim
79 words
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.
Claim 15
Dependent Claim
12 words
The electrode of claim 12 wherein said adhesive contains a compatible preservative.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |