Primed substrate comprising conductive polymer layer and method

• US 20060145127A1
• Filed: 12/30/2004
• Published: 07/06/2006
• Est. Priority Date: 12/30/2004
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Lockridge, James E.
• Application Number:
  US11/027,190
• Publication Number:
  US 20060145127A1
• Time in Patent Office: Days
• US Class Current: 252/500
• CPC Class Codes: C09D 5/24 Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

Methods of making a conductive sheet comprising conductive polymer and articles.

Claims

1. A method of making a conductive sheet comprising:

providing a substrate comprising a surface having a polymeric primer;

coating the polymeric primer with a conductive coating composition comprising a conductive polymer, a polymeric binder, and a polar aprotic solvent; and

drying the composition.

2. The method of claim 1 wherein the conductive sheet exhibits a durability of at least 50,000 rubs according to the Rub Durability Test.

3. The method of claim 1 wherein the conductive sheet exhibits a durability of at least 100,000 rubs according to the Rub Durability Test.

4. The method of claim 1 wherein the conductive sheet exhibits a durability of at least 200,000 rubs according to the Rub Durability Test.

5. The method of claim 1 wherein the primer is partially soluble or swellable in the polar aprotic solvent.

6. The method of claim 1 wherein the polymeric primer is crosslinked.

7. The method of claim 1 wherein the polymeric primer is selected from an acrylic resin, a polyvinyl resin, polyester, polyacrylate, polyurethane, polyethylene acrylic acid, polyethylene imine, and mixtures thereof.

8. The method of claim 1 wherein the substrate is surface treated with a treatment selected from the group consisting of plasma, corona, flame, chemical oxidization, and chemical etching.

9. The method of claim 1 wherein the conductive polymer is a thiophene-containing polymer.

10. The method of claim 9 wherein the conductive polymer is polyethylenedioxythiophene polystyrene sulfonate.

11. The method of claim 1 wherein the polymeric binder is crosslinked.

12. The method of claim 1 wherein the polar aprotic solvent is selected from the group comprising alkyl sulfoxides, N-methylpyrrolidone, amide solvent, and mixtures thereof.

13. The method of claim 1 wherein the polymeric binder is an ethylenically unsaturated binder precursor.

14. The method of claim 1 wherein the curing comprises radiation curing.

15. The method of claim 14 wherein the curing comprises ultraviolet curing.

16. The method of claim 1 wherein the substrate is transparent.

17. The method of claim 1 wherein the substrate comprises polyester.

18. A conductive sheet comprising a

a substrate having a surface comprising a polymeric primer;

and

a conductive polymer layer disposed on the primer wherein the conductive polymer layer comprises residual polar aprotic solvent.

19. The conductive sheet of claim 18 wherein the concentration of residual solvent is less than 1 wt-%.

20. A touch screen comprising the conductive sheet of claim 18.