Conductive adhesive and biomedical electrode
First Claim
1. In an essentially dry biomedical electrode comprising an electrode plate having a first surface and a second surface, said electrode plate having means for electrical connection to a lead wire of an electro-medical device, and a conductive material on said second surface of said electrode plate for enhancing electrical connection with the skin, the improvement wherein said conductive material comprises a swellable, dermally-nonirritating, conformable, cohesive, synthetic, ionic, hydrophilic polymer coating having a continuous covalently-bonded network throughout said coating formed by the essentially solventless process of:
- (a) compounding an adhesive precursor comprising(1) a water-soluble polyhydric alcohol which is a liquid at about 20°
C,;
(2) an ionic unsaturated free radically polymerizable material which is soluble in said polyhydric alcohol;
(3) a free radical initiator; and
(4) a crosslinking agent of a multifunctional unsaturated free radically polymerizable material;
(b) coating said adhesive precursor on said second surface of said electrode plate or a releasable transfer sheet;
(c) polymerizing said coated precursor whereby an electrically conductive pressure-sensitive adhesive is formed on said electrode plate or transfer sheet; and
(d) when said adhesive is formed on said transfer sheet, transferring said adhesive to said second surface of said electrode plate.
0 Assignments
0 Petitions
Accused Products
Abstract
A biomedical electrode having a conductive adhesive thereon which is derived from an essentially solventless process. The resulting adhesive is characterized in that it is a swellable, dermally-nonirritating conformable, cohesive, ionic, hydrophilic polymer.
189 Citations
16 Claims
-
1. In an essentially dry biomedical electrode comprising an electrode plate having a first surface and a second surface, said electrode plate having means for electrical connection to a lead wire of an electro-medical device, and a conductive material on said second surface of said electrode plate for enhancing electrical connection with the skin, the improvement wherein said conductive material comprises a swellable, dermally-nonirritating, conformable, cohesive, synthetic, ionic, hydrophilic polymer coating having a continuous covalently-bonded network throughout said coating formed by the essentially solventless process of:
-
(a) compounding an adhesive precursor comprising (1) a water-soluble polyhydric alcohol which is a liquid at about 20°
C,;(2) an ionic unsaturated free radically polymerizable material which is soluble in said polyhydric alcohol; (3) a free radical initiator; and (4) a crosslinking agent of a multifunctional unsaturated free radically polymerizable material; (b) coating said adhesive precursor on said second surface of said electrode plate or a releasable transfer sheet; (c) polymerizing said coated precursor whereby an electrically conductive pressure-sensitive adhesive is formed on said electrode plate or transfer sheet; and (d) when said adhesive is formed on said transfer sheet, transferring said adhesive to said second surface of said electrode plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An essentially dry biomedical electrode comprising an electrode plate having a first surface and a second surface, said electrode plate having means for electrical connection to a lead wire of an electro-medical device, and a conductive material on said second surface of said electrode plate for enhancing electrical connection with the skin, said conductive material being a swellable, non-soluble, dermally-non-irritating, conformable, cohesive, synthetic, ionic, hydrophilic polymer coating having a continuous covalently-bonded network throughout said coating, said polymer being derived from the essentially solventless in situ polymerization of an ionic unsaturated free radically polymerizable material dissolved in a polyhydric alcohol which is a liquid at about 20°
- C. in the presence of a crosslinking agent of a multifunctional unsaturated free radically polymerizable material and a free radical initiator.
-
10. An electrically conductive swellable, non-soluble, dermally-nonirritating, conformable, cohesive, synthetic, ionic hydrophilic adhesive coating having a continuous covalently-bonded network throughout said coating derived from an essentially solventless polymerization of a precursor comprised of a water-soluble polyhydric alcohol which is a liquid at about 20°
- C., an ionic unsaturated free radically polymerizable merizable material which is soluble in said polyhydric alcohol, a crosslinking agent of a multifunctional unsaturated free radically polymerizable material and a free radical initiator soluble in said polyhydric alcohol, said polymerized precursor resulting in an adhesive coating which is characterized in that it is an electrically conductive polymer.
-
11. In a biomedical electrode comprising an electrode plate having an upper surface and a lower skin-directed surface, means for electrically connecting said electrode plate to the lead wire of an electro-medical device, and a coating of an electrically-conductive pressure-sensitive adhesive on said lower surface of said electrode plate for enhancing electrical connection with the skin, the improvement wherein said adhesive coating is swellable, dermally-non-irritating, conformable and cohesive, and is formed from an adhesive precursor comprising:
-
(1) a water-soluble polyhydric alcohol which is a liquid at about 20°
C.;(2) an ionic unsaturated free radically-polymerizable material which is soluble in said polyhydric alcohol; (3) a photo-initiator; and (4) a crosslinking agent of a multifunctional unsaturated free radically-polymerizable material; said adhesive precursor being photo-polymerized in situ whereby said adhesive coating is a continuous covalently-bonded network throughout said coating. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification