Ink jet printable hydrogel for sensor electrode applications

• US 20070059459A1
• Filed: 09/12/2005
• Published: 03/15/2007
• Est. Priority Date: 09/12/2005
• Status: Abandoned Application

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Yang, Haixin
• Application Number:
  US11/224,620
• Publication Number:
  US 20070059459A1
• Time in Patent Office: Days
• US Class Current: 428/32.340
• CPC Class Codes: C09D 11/30 Inkjet printing inks

Abstract

The present invention provides an ink jet printable hydrogel composition comprising: (a) one or more cross-linkable ionic polymers wherein said polymer is a copolymer, interpolymer or mixture thereof; (b) initiation system; and (c) solvent; wherein said cross-linkable ionic polymers can be selected from photocross-linkable polymers, thermally cross-linkable polymers, photocross-linkable and thermally cross-linkable polymers, and mixtures thereof; and with the proviso that the composition has a viscosity of less than about 100 mPa·s.

Claims

1. An ink jet printable hydrogel composition comprising:

(a) one or more cross-linkable ionic polymers wherein said polymer is a copolymer, interpolymer or mixture thereof;

(b) initiation system; and

(c) solvent;

and with the proviso that the composition has a viscosity of less than about 100 mPa·

s.

2. The composition of claim 1 wherein said cross-linkable ionic polymers are selected from photocross-linkable polymers, thermally cross-linkable polymers, photocross-linkable and thermally cross-linkable polymers, and mixtures thereof.

3. The composition of claim 1 wherein said polymer is a photocross-linkable polymer wherein each copolymer or interpolymer or mixture comprises:

(1) a nonacidic comonomer comprising a C_1-10 alkyl acrylate, C_1-10 alkyl methacrylate, styrenes, substituted styrenes or combinations thereof;

(2) an acidic comonomer and its salts comprising ethylenically unsaturated carboxylic acid containing moiety, wherein 2-25% of the carboxylic acid containing moiety is reacted with a reactive molecule having a first and second functional unit, wherein the first functional unit is a vinyl group and the second functional unit is capable of forming a chemical bond by reaction with the carboxylic acid moiety; and

(3) third comonomer units formed from the reacted portion of acidic comonomers.

4. The composition of claim 3 wherein said polymer further comprises a nonacidic comonomer comprising C1-10 alkyl or alkoxy methacrylate or acrylate.

5. The composition of claim 3 wherein the vinyl group is selected from a methacrylate, acrylate group or mixtures thereof.

6. The composition of claim 3 wherein the second functional unit is selected from an epoxide, alcohol, amine or mixtures thereof.

7. The composition of any one of claims 1-6 further comprising a monomer.

8. The composition of claim 7 wherein said monomer is selected from the group comprising polyoxyethylated trimethylolpropane triacrylate, ethylated pentaerythritol triacrylate, dipentaerythritol monohydroxypentaacrylate, 1,10-decanediol dimethlacrylate and mixtures thereof.

9. The composition of claim 1 in which the solvent is selected from the group comprising water, ethanol, methyl ethyl ketone, acetone, and mixtures thereof.

10. The composition of claim 1 further comprising an additive selected from the group comprising humectants, surfactants, biocides, preservatives and combinations thereof.

11. The composition of claim 1 which is in the form of an ink suitable for ink jet printing.

13. A method of producing a processed hydrogel film:

(a) providing the composition of claim 1;

(b) providing a substrate;

(c) depositing the composition in (a) onto said substrate via ink jet printing techniques; and

(d) processing said composition on said substrate to form a hydrogel film or coating layer.

15. A sensor electrode comprising the hydrogel film of claim 13.

16. A method of forming a sensor electrode comprising:

(a) providing the composition of claim 1;

(b) providing an electrode substrate;

(c) depositing the composition in (a) onto said substrate via ink jet printing techniques; and

(d) processing said composition on said substrate to form a hydrogel film or coating layer.

17. A sensor electrode formed by the method of claim 16.

12. A method of producing a processed hydrogel film comprising:

(a) providing an ink jet printable hydrogel composition;

(b) providing a substrate or electrode;

(c) depositing the composition in (a) onto said substrate via ink jet printing techniques; and

(d) processing said composition on said substrate to form a hydrogel film or coating layer.

14. A hydrogel film formed by the method of any one of claims 12 or 13.