Highly catalytic screen-printing ink

• US 20030155557A1
• Filed: 12/19/2002
• Published: 08/21/2003
• Est. Priority Date: 12/20/2001
• Status: Active Grant

• Current Assignee: LifeScan IP Holdings, LLC
• Original Assignee: Cygnus, Inc. (Johnson & Johnson)
• Inventors: Tierney, Michael J.
• Granted Patent: US 7,018,568 B2
• Time in Patent Office: Days
• US Class Current: 252/500
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C09D 11/101 Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/52 Electrically conductive inks

Abstract

The invention is directed to conductive polymer compositions, catalytic ink compositions (e.g., for use in screen-printing), electrodes produced by deposition of an ink composition, methods of making, and methods of using thereof. An exemplary ink material comprises platinum black and/or platinum-on-carbon as the catalyst, graphite as a conducting material, a polymer binding material, and an organic solvent. The polymer binding material is typically a copolymer of hydrophilic and hydrophobic monomers. The conductive polymer compositions of the present invention can be used, for example, to make electrochemical sensors. Such sensors can be used in a variety of analyte monitoring devices to monitor analyte amount or concentrations in subjects, for example, glucose monitoring devices to monitor glucose levels in subjects with diabetes.

Claims

1. A conductive polymer composition comprising:

about 0.01% to about 5% by weight of a transition metal catalyst;

an electrically conductive material; and

a polymer obtained by polymerizing a compound of formula (I) with a compound of formula (II)

 

wherein R₁, R₂, R₃, R₄, R₅, and R₆ are independently selected from the group consisting of hydrogen, an alkyl having from 1 to 6 carbon atoms, and a cycloalkyl group having from 4 to 8 carbon atoms.

2. The composition of claim 1, wherein the transition metal catalyst is selected from the group consisting of platinum, palladium, and rhodium.

3. The composition of claim 2, wherein the catalyst is platinum.

4. The composition of claim 2, wherein the catalyst is platinum on graphite.

5. The composition of claim 1, wherein R₁, R₂ and R₄ are hydrogen.

6. The composition of claim 5, wherein R₅ and R₆ are independently selected from the group consisting of hydrogen, methyl, ethyl, propyl, isopropyl, and butyl.

7. The composition of claim 5, wherein R₃ is H, R₅ is methyl, and R₆ is methyl or ethyl.

8. The composition of claim 1, wherein R₁, R₂, R₃, and R₄ are hydrogen, and R₅ and R₆ are methyl.

9. The composition of claim 1, wherein the conductive material is synthetic graphite, pyrolytic graphite, or natural graphite.

27. An electrode, comprising the conductive polymer composition of claim 1 on a non-conducting substrate.

28. A method of producing the conductive polymer composition of claim 1, said method comprising

mixing said transition metal catalyst, electrically conductive material, polymer, and a suitable solvent to obtain a homogenous mixture,

removing said solvent, wherein removing said solvent produces the conductive polymer composition.

10. An ink composition, comprising:

about 0.003% to about 1.6% by weight of a transition metal catalyst;

an electrically conductive material;

a polymer obtained by polymerizing a compound of formula (I) with a compound of formula (II)

 

wherein R₁, R₂, R₃, R₄, R₅, and R₆ are independently selected from the group consisting of hydrogen, an alkyl having from 1 to 6 carbon atoms, and a cycloalkyl group having from 4 to 8 carbon atoms; and

an organic solvent.

11. The composition of claim 10, wherein the conductive material is synthetic graphite, pyrolytic graphite, or natural graphite.

12. The composition of claim 10, wherein the solvent is a glycol diacetate.

13. The composition of claim 12, wherein the solvent is ethylene glycol diacetate.

14. The composition of claim 10, wherein the transition metal catalyst is selected from the group consisting of platinum, palladium, and rhodium.

15. The composition of claim 14, wherein the catalyst is platinum.

16. The composition of claim 14, wherein the catalyst is platinum on graphite.

30. A method of making an electrode, comprising

depositing the ink composition of claim 10 on a non-conducting substrate, and

removing said solvent to make said electrode.

17. An ink composition, comprising:

about 0.003% to about 1.6% transition metal catalyst;

a polymer obtained by polymerizing substituted or unsubstituted styrene and R₇C(CH₂)C(O)OR₈, wherein R₇ and R₈ are independently selected to be hydrogen or lower alkyl;

graphite; and

glycol diacetate.

18. The composition of claim 17, wherein the metal catalyst is selected from the group consisting of platinum, palladium, and rhodium.

19. The composition of claim 18, wherein the catalyst is platinum.

20. The composition of claim 18, wherein the catalyst is platinum on graphite.

21. The composition of claim 17, wherein R₇ and R₈ are methyl.

22. The composition of claim 17, wherein graphite is synthetic graphite or pyrolytic graphite.

23. The composition of claim 17, wherein glycol diacetate is ethylene glycol diacetate.

29. A method of making the electrode of claim 23, said method comprising

mixing said transition metal catalyst, electrically conductive material, polymer, and a suitable solvent to obtain a homogenous mixture,

depositing said homogenous mixture on said non-conducting substrate, and

removing said solvent to make said electrode.

24. A conductive polymer composition comprising about 0.003% to about 1.6% platinum, a poly(styrene methyl methacrylate) binder, graphite, and a solvent.

25. The composition of claim 24, wherein graphite is synthetic graphite or pyrolytic graphite.

26. The composition of claim 24, wherein the solvent is ethylene glycol diacetate.