Electrically-conductive, pressure-sensitive adhesive and biomedical electrodes
First Claim
1. A composition comprising:
- a conformable, cohesive, adhesive copolymer matrix formed by free radical polymerizing an adhesive precursor comprising a carboxylic acid as a water-soluble hydrogen bond donating monomer, N-vinyl pyrrolidone as a water-soluble hydrogen bond accepting monomer, and a polymerization initiator, wherein the molar ratio of hydrogen bond accepting sites to hydrogen bond donating sites available on the monomers is from about 1;
3 to about 6;
1 and wherein the weight ratio of carboxylic acid to N-vinyl pyrrolidone is from about 1;
2 to about 3;
1; and
a plasticizing, electrically-conductive solution comprised of from about 0 to 98% by weight water-soluble, polar organic compound, about 2 to 100% by weight water, and about 0 to 12% by weight water-soluble salt;
wherein the composition contains from about 12% to about 50% by weight non-volatile copolymer matrix, the hydrogen bond donating sites on the copolymer matrix are from about 5% to about 80% neutralized, and the composition is substantially homogeneous and pressure-sensitive adhesive.
1 Assignment
0 Petitions
Accused Products
Abstract
An electrically-conductive, pressure-sensitive adhesive composition having a polymeric matrix comprised of copolymers of hydrogen bond donating monomer (for example acrylic acid) and hydrogen bond accepting monomers (for example N-vinylpyrrolidone) is disclosed. The polymeric matrix is homogeneously mixed with a electrically-conductive plasticizing solution comprised of from 0% to 98% by weight water-soluble, polar organic compound (for example glycerol), 2% to 100% by weight water, and 0 to 12% by weight water-soluble salt. The compsition contains from about 12% to 50% by weight non-volatile copolymer matrix and the hydrogen bond donating sites on the copolymer matrix are from about 5% to about 95% neutralized. Free radical polymerization methods of making the composition and biomedical electrodes incorporating the composition are also described.
-
Citations
18 Claims
-
1. A composition comprising:
-
a conformable, cohesive, adhesive copolymer matrix formed by free radical polymerizing an adhesive precursor comprising a carboxylic acid as a water-soluble hydrogen bond donating monomer, N-vinyl pyrrolidone as a water-soluble hydrogen bond accepting monomer, and a polymerization initiator, wherein the molar ratio of hydrogen bond accepting sites to hydrogen bond donating sites available on the monomers is from about 1;
3 to about 6;
1 and wherein the weight ratio of carboxylic acid to N-vinyl pyrrolidone is from about 1;
2 to about 3;
1; anda plasticizing, electrically-conductive solution comprised of from about 0 to 98% by weight water-soluble, polar organic compound, about 2 to 100% by weight water, and about 0 to 12% by weight water-soluble salt; wherein the composition contains from about 12% to about 50% by weight non-volatile copolymer matrix, the hydrogen bond donating sites on the copolymer matrix are from about 5% to about 80% neutralized, and the composition is substantially homogeneous and pressure-sensitive adhesive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 13)
-
-
9. An electrically-conductive, pressure-sensitive adhesive formed by the free radical copolymerization of an adhesive precursor comprising:
-
a carboxylic acid as a water-soluble hydrogen bond donating monomer; N-vinyl pyrrolidone as a water-soluble hydrogen bond accepting monomer; a free radical initiator; and a plasticizing, electrically-conductive solution comprised of from about 0 to 98% by weight water-soluble, polar organic compound, from about 2 to 100% by weight water, and from about 0 to 12% by weight soluble salt; wherein the ratio of hydrogen bond accepting sites to hydrogen bond donating sites on the monomers is from about 1;
3 to about 6;
1, the weight ratio of carboxylic acid to N-vinyl pyrrolidone is from about 1;
2 to about 3;
1, the adhesive precursor contains from about 12% to about 50% by weight total monomers, the acid sites on the hydrogen bond donating monomer are from about 5% to about 80% neutralized, and the composition is substantially homogeneous and pressure-sensitive adhesive. - View Dependent Claims (10, 11, 12)
-
-
14. A process for making an electrically-conductive, pressure-sensitive adhesive comprising:
-
(a) providing an adhesive precursor comprising a carboxylic acid as a hydrogen bond donating monomer, N-vinyl pyrrolidone as a hydrogen bond accepting monomer, a free radical initiator, and a plasticizing, electrically-conductive solution comprised of from about 0 to 98% by weight water-soluble organic compound, from about 2 to 100% by weight water, and from about 0 to 12% by weight soluble salt; wherein the ratio of hydrogen bond accepting sites to hydrogen bond donating sites on the monomers is from about 1;
3 to about 6;
1, the weight ratio of carboxylic acid to N-vinyl pyrrolidone is from about 1;
2 to about 3;
1, the adhesive precursor contains from about 12% to about 50% by weight of total monomers, the hydrogen bond donating sites on the hydrogen bond donating monomer are from about 5% to about 80% neutralized, and the composition is substantially homogeneous and pressure-sensitive adhesive;(b) coating the adhesive precursor on a substrate; and (c) initiating copolymerization of the monomers in the adhesive precursor.
-
-
15. A biomedical electrode comprising:
an electrical conductor, means integrally associated with the conductor for connecting the electrode to an electromedical instrument, an electrically-conductive, pressure-sensitive adhesive in electrical contact with the conductor comprising a conformable, cohesive, adhesive copolymer matrix formed by free radical polymerizing an adhesive precursor comprising a carboxylic acid as a water-soluble hydrogen bond donating monomer, N-vinyl pyrrolidone as a water-soluble hydrogen bond accepting monomer, and a polymerization initiator, wherein the molar ratio of hydrogen bond accepting sites to hydrogen bond donating sites available on the monomers is from about 1;
3 to about 6;
1 and wherein the weight ratio of carboxylic acid to N-vinyl pyrrolidone is from about 1;
2 to about 3;
1, and a plasticizing, electrically-conductive solution comprised of from about 0 to 98% by weight water-soluble, polar organic compound, about 2 to 100% by weight water, and about 0 to 12% by weight water-soluble salt;
wherein the electrically-conductive, pressure-sensitive adhesive contains from about 12% to about 50% by weight non-volatile copolymer matrix, the hydrogen bond donating sites on the copolymer are from about 5% to about 80% neutralized, and the composition is substantially homogeneous and pressure-sensitive adhesive.- View Dependent Claims (16)
-
17. A method of making a biomedical electrode comprising:
-
(a) providing a web of conductor; (b) covering the conductor with an electrically-conductive, pressure-sensitive adhesive comprised of a conformable, cohesive, adhesive copolymer formed by free radical polymerizing an adhesive precursor comprising a carboxylic acid as a water-soluble hydrogen bond donating monomer, N-vinyl pyrrolidone as a water-soluble hydrogen bond accepting monomer, and a polymerization initiator, wherein the molar ratio of hydrogen bond accepting sites to hydrogen bond donating sites available on the monomers is from about 1;
3 to about 6;
1 and wherein the weight ratio of carboxylic acid to N-vinyl pyrrolidone is from about 1;
2 to about 3;
1, and a plasticizing, electrically-conductive solution comprised of from about 0 to 98% by weight water-soluble, polar organic compound, about 2 to 100% by weight water, and about 0 to 12% by weight water-soluble salt;
wherein the electrically-conductive, pressure-sensitive adhesive contains from about 12% to about 50% by weight non-volatile copolymer matrix, the hydrogen bond donating sites on the copolymer matrix are from about 5% to about 80% neutralized, and the composition is substantially homogeneous and pressure-sensitive adhesive; and(c) cutting the laminate of steps a and b to form electrodes. - View Dependent Claims (18)
-
Specification