Adhesive composition, bio-electrode, and method for manufacturing a bio-electrode

1. An adhesive composition comprising a resin and an electro-conductive material,

wherein the electro-conductive material is one or more salts selected from the group consisting of sodium salt, potassium salt, and calcium salt of fluorosulfonic acid having 5 or more carbon atoms shown by the following general formula (1),

(R 1 —X—Y—SO 3 − ) n M n+   (1)

wherein,

R 1 represents a linear, branched, or cyclic monovalent hydrocarbon group having 1 to 30 carbon atoms and optionally substituted by a heteroatom or optionally interposed by the heteroatom;

X represents any of a single bond, an ether group, an ester group, and an amide group;

Y represents a linear or branched alkylene group having 2 to 4 carbon atoms, containing 1 to 6 fluorine atoms, and optionally containing a carbonyl group;

M n+ represents any of a sodium ion, a potassium ion, and a calcium ion; and

“n” is 1 when M n+ is a sodium ion or a potassium ion, or is 2 when M n+ is a calcium ion.

2. The adhesive composition according to claim 1 , wherein the electro-conductive material is further defined by the following general formulae (1-1), (1-2), or (1-3),

wherein,

each of the general formulae comprises R 1 and X;

Rf 1 to Rf 4 each independently represent an atom or a group selected from a hydrogen atom, a fluorine atom, a methyl group, an ethyl group, and a trifluoromethyl group, with the proviso that one or more of Rf 1 to Rf 4 is the fluorine atom or the trifluoromethyl group, and Rf 1 and Rf 2 are optionally combined with each other to form the carbonyl group.

3. The adhesive composition according to claim 1 , wherein the electro-conductive material has a polymerizable double bond or a hydroxy group in the anion.

4. The adhesive composition according to claim 2 , wherein the electro-conductive material has a polymerizable double bond or a hydroxy group in the anion.

5. The adhesive composition according to claim 1 , wherein the resin is one or more resins selected from silicone resin, acrylic resin, and urethane resin.

6. The adhesive composition according to claim 2 , wherein the resin is one or more resins selected from silicone resin, acrylic resin, and urethane resin.

7. The adhesive composition according to claim 1 , further comprising a carbon material.

8. The adhesive composition according to claim 2 , further comprising a carbon material.

9. The adhesive composition according to claim 7 , wherein the carbon material is either or both of carbon black and carbon nanotube.

10. The adhesive composition according to claim 8 , wherein the carbon material is either or both of carbon black and carbon nanotube.

11. A bio-electrode comprising an electro-conductive base material and a living body contact layer formed on the electro-conductive base material;

wherein the living body contact layer is a cured material of the adhesive composition according to claim 1 .

12. A bio-electrode comprising an electro-conductive base material and a living body contact layer formed on the electro-conductive base material;

wherein the living body contact layer is a cured material of the adhesive composition according to claim 2 .

13. A bio-electrode comprising an electro-conductive base material and a living body contact layer formed on the electro-conductive base material;

wherein the living body contact layer is a cured material of the adhesive composition according to claim 3 .

14. A bio-electrode comprising an electro-conductive base material and a living body contact layer formed on the electro-conductive base material;

wherein the living body contact layer is a cured material of the adhesive composition according to claim 5 .

15. The bio-electrode according to claim 11 , wherein the electro-conductive base material comprises one or more species selected from gold, silver, silver chloride, platinum, aluminum, magnesium, tin, tungsten, iron, copper, nickel, stainless steel, chromium, titanium, and carbon.

16. A method for manufacturing a bio-electrode having an electro-conductive base material and a living body contact layer formed on the electro-conductive base material, comprising:

applying the adhesive composition according to claim 1 onto the electro-conductive base material; and curing the adhesive composition; thereby forming the living body contact layer.

17. A method for manufacturing a bio-electrode having an electro- conductive base material and a living body contact layer formed on the electro-conductive base material, comprising:

applying the adhesive composition according to claim 2 onto the electro-conductive base material; and curing the adhesive composition; thereby forming the living body contact layer.

18. A method for manufacturing a bio-electrode having an electro- conductive base material and a living body contact layer formed on the electro-conductive base material, comprising:

applying the adhesive composition according to claim 3 onto the electro-conductive base material; and curing the adhesive composition; thereby forming the living body contact layer.

19. A method for manufacturing a bio-electrode having an electro-conductive base material and a living body contact layer formed on the electro-conductive base material, comprising:

applying the adhesive composition according to claim 5 onto the electro-conductive base material; and curing the adhesive composition; thereby forming the living body contact layer.

20. The method for manufacturing a bio-electrode according to claim 16 , wherein the electro-conductive base material comprises one or more species selected from gold, silver, silver chloride, platinum, aluminum, magnesium, tin, tungsten, iron, copper, nickel, stainless steel, chromium, titanium, and carbon.