Polymeric electrochromic devices

• US 6,924,919 B2
• Filed: 10/16/2001
• Issued: 08/02/2005
• Est. Priority Date: 10/17/2000
• Status: Expired due to Term

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Lin, Chia-Cheng, Rukavina, Thomas G., Hunia, Robert M.
• Primary Examiner(s): THOMPSON, TIMOTHY J
• Application Number:
  US09/978,882
• Publication Number:
  US 20020048678A1
• Time in Patent Office: 1,386 Days
• Field of Search: 359/265, 359/273, 359/274, 359/275, 438/69, 438/412, 438/432, 428/432
• US Class Current: 359/265
• CPC Class Codes: B32B 27/06 as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: Y10T 428/31507 Of polycarbonate

Abstract

An electrochromic device includes a first substrate having at least one polymeric surface; a primer layer along the polymeric surface; a first electrically conductive transparent coating along the primer of the first substrate, wherein the primer layer adheres the first electrically conductive coating to the polymeric surface of the first substrate; a second substrate spaced apart from the first substrate to define a chamber therebetween; a second electrically conductive transparent coating on a surface of the second substrate such that the first coating is in facing relation to the second coating, wherein at least one of the first and second substrates is transparent; and an electrochromic medium contained in the chamber, the electrochromic medium having reduced luminous transmittance upon application of electrical power to the first and second conductive coatings and establishing an electrical potential through the electrochromic medium, and wherein the electrochromic medium and the primer layer are compatible.

Claims

1. An electrochromic transparency comprising:

first and second spaced apart transparent substrates defining a chamber there between, said first and said second substrates including first and second electrically conductive transparent coatings on respective facing surfaces thereof; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second electrically conductive coatings to establish an electrical potential through said electrochromic medium, said electroconductive medium comprising an electrochromic solution dispersed in a polymeric matrix;

wherein at least one of said first and said second substrates is plastic, and at least one of said first and second electrically conductive coatings is affixed to said plastic substrate through a transparent primer composition which is compatible with said electrochromic medium.

2. The electrochromic transparency as in claim 1, wherein said plastic substrate is selected from polycarbonates, polyacrylics, polyurethanes, urethane carbonate copolymers, polysulfones, polyimides, polyacrylates, polyethers, polyester, polyalkenes, polyimides, polysulfides and polyvinylacetates, and said primer composition is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates, zirconium silicates, and SiO_x, and mixtures thereof.

3. The electrochromic transparency as in claim 2, wherein said electrochromic medium comprises at least two compounds comprising at least one anodic electrochromic compound and at least one cathodic electrochromic compound, and wherein application of electrical potential to said electrochromic medium causes simultaneous oxidation of said anodic electrochromic compound and reduction of said cathodic electrochromic compound, thereby causing reduced luminous transmittance.

4. The electrochromic transparency as in claim 3, wherein at least one of said electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI, and mixtures thereof.

5. An electrochromic device comprising:

a first substrate having at least one polymeric surface;

a primer layer along said polymeric surface;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent, wherein at least one of said first and second electrically conductive coatings is a two part coating comprising a first electrically conductive portion deposited from a metal cathode and a second electrically conductive portion deposited from a ceramic cathode; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium.

6. The electrochromic device as in claim 5, wherein said primer layer is compatible with said electrochromic medium.

22. The electrochromic device as in claim 5, wherein said first substrate is a plastic material.

23. The electrochromic device as in claim 5, wherein said first and second substrates are transparent and said primer layer is transparent.

24. The electrochromic device as in claim 5, wherein said first and second substrates are transparent plastic material and said primer layer is a first transparent primer layer, and further comprising a second transparent primer layer positioned between said surface of said second substrate and said second electrically conductive coating to adhere said second electrically conductive coating to said second substrate, said second primer layer being compatible with said electrochromic medium.

25. The electrochromic device as in claim 5, wherein said primer layer is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates and zirconium silicates and mixtures thereof.

26. The electrochromic device as in claim 5, wherein said primer layer is selected from a carbonate diol-based cross linked polyurethane, a copolymer of cyanoethylacrylate and acrylic acid;

a copolymer of 2-ethylhexylacrylate and acrylic acid;

a terpolymer of cyanoethylacrylate, hydroxyethylacrylate and acrylic acid;

a terpolymer of cyanoethylpcrylate, 2-ethylhexylacrylate and acrylic acid; and

a terpolymer of zirconium alkoxide, colloidal silica and acrylate silane.

27. The electrochromic device as in claim 5, wherein said primer layer comprises a carbonate diol-based cross linked polyurethane and said electrochromic medium comprises a polyurethane.

28. The electrochromic device as in claim 5, wherein said electrochromic medium comprises at least two compounds comprising at least one anodic electrochromic compound and at least one cathodic electrochromic compound, and wherein application of electrical potential through said electrochromic medium causes simultaneous oxidation of said anodic electrochromic compound and reduction of said cathodic electrochromic compound, thereby causing reduced luminous transmittance.

30. The electrochromic device as in claim 5, wherein both of said first and second electrically conductive coatings are a two part coating comprising a first electrically conductive portion deposited from a metal cathode and a second electrically conductive portion deposited from a ceramic cathode.

31. The electrochromic device as in claim 5, wherein each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI, and mixtures thereof.

37. The electrochromic device as in claim 22, wherein said first and second substrates are transparent and said primer layer is transparent.

38. The electrochromic device as in claim 22, wherein said second substrate is a plastic material.

39. The electrochromic device as in claim 22, wherein said plastic material is selected from polycarbonates, polyacrylics, polyurethanes, urethane carbonate copolymers, polysulfones, polyimides, polyacrylates, polyester, polyethers, polyalkenes, polyimides, polysulfides and polyvinylacetates.

40. The electrochromic device as in claim 39, wherein said primer layer is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates, zirconium silicates, and SiO_x, and mixtures thereof, and each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI and mixtures thereof.

41. The electrochromic device as in claim 39, wherein said polycarbonate is selected from polycarbonate urethane, bisphenol A polycarbonate, polyether polycarbonate, polyester carbonate and diethylene glycol bis(allyl carbonate).

42. The electrochromic device as in claim 24, wherein said primer layer is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates, zirconium silicates and SiO_x, and mixtures thereof.

43. The electrochromic device as in claim 42, wherein each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI and mixtures thereof.

44. The electrochromic device as in claim 28, wherein said electrochromic medium is self-erasing.

7. A method for making an electrochromic device comprising:

providing a first substrate having a polymeric surface;

providing a primer layer along said polymeric surface;

forming a first electrically conductive transparent coating on said primer layer of said first substrate;

providing a second substrate, wherein at least one of said first and second substrates is transparent;

forming a second electrically conductive transparent coating on a surface of said second substrate, wherein at least one of said first electrically conductive coating or said second electrically conductive coating comprises a two part coating comprising a first electrically conductive portion deposited from a metal cathode, and a second electrically conductive portion deposited from a ceramic cathode;

spacing said first and said second substrates from each other such that said first electrically conductive coating and said second electrically conductive coating are in facing relationship to provide a chamber there between; and

providing an electrochromic medium within said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings.

8. The method according to claim 7, wherein said primer layer is compatible with said electrochromic medium.

35. The method according to claim 7, wherein said first substrate is plastic.

36. The method according to claim 7, wherein both said first and second substrates are plastic, and further comprising applying a primer material that is compatible with said electrochromic medium between said surface of said second substrate and said second electrically conductive coating.

46. The method according to claim 35, wherein both said first and second substrates are transparent and said primer layer is transparent.

47. The method according to claim 36, wherein both said first and second substrates are transparent, and said first and second primer layers are transparent.

48. The method according to claim 36, wherein said first electrically conductive coating forming comprises a first two part coating comprising a first electrically conductive portion deposited along said first substrate from a metal cathode, and a second electrically conductive portion deposited along said first substrate from a ceramic cathode, and said second electrically conductive coating comprises a second two part coating comprising a first electrically conductive portion deposited along said second substrate from a metal cathode, and a second electrically conductive portion deposited along said second substrate from a ceramic cathode.

9. An electrochromic device comprising:

a first substrate having at least one polymeric surface;

a primer layer along said polymeric surface;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent;

a highly reflective, opaque coating along a surface of one of said first or second substrates; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.

29. The electrochromic device as in claim 9, wherein each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI, and mixtures thereof.

32. The electrochromic device as in claim 9, wherein said plastic material is selected from polycarbonates, polyacrylics, polyurethanes, urethane carbonate copolymers, polysulfones, polyimides, polyacrylates, polyester, polyethers, polyalkenes, polyimides, polysulfides and polyvinylacetates;

said primer layer is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates and zirconium silicates and mixtures thereof, and each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI and mixtures thereof.

33. The electrochromic device as in claim 9, wherein said opaque coating is positioned between said first or second substrate and said corresponding first or second electrically conductive coating.

34. The electrochromic device as in claim 9, wherein said first or second substrate is positioned between said opaque coating and said corresponding first or second electrically conductive coating.

45. The electrochromic device as in claim 32, wherein at least one of said first and second electrically conductive coatings is a two part coating comprising a first electrically conductive portion deposited from a metal cathode and a second electrically conductive portion deposited from a ceramic cathode.

10. An electrochromic device comprising:

a first substrate selected from polyurethanes, urethane carbonate copolymers, polysulfones, polyimides, polyester, polyethers, polyalkenes, polysulfides and polyvinylacetates;

a primer layer along a major surface of said first substrate;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.

11. The electrochromic device as in claim 10, wherein said primer layer is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates, zirconium silicates, and SiO_x, and mixtures thereof, and each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI and mixtures thereof.

19. The electrochromic device as in claim 10 wherein the electrochromic medium comprises at least one electrochromic medium selected from the group of electrochromic solutions, electrochromic gels and electrochromic semi-solid materials and portions of the electrochromic medium contact at least one of the primers through cracks in the electroconductive film between the at least one primer and the electrochromic medium.

12. An electrochromic device comprising:

a first substrate selected from polycarbonate urethane and polyester carbonate;

a primer layer along a major surface of said first substrate;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.

20. The electrochromic device as in claim 12 wherein the electrochromic medium comprises at least one electrochromic medium selected from the group of electrochromic solutions , electrochromic gels and electrochromic semi-solid materials.

21. The electrochromic device as in claim 20 wherein portions of the electrochromic medium contact at least one of the primers through cracks in the electroconductive film between the at least one primer and the electrochromic medium.

13. An electrochromic device comprising:

a first substrate having at least one polymeric surface;

a primer layer along said polymeric surface;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent and each one of said first and second electrically conductive coatings is selected from antimony doped tin oxide, IMI and mixtures thereof; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.

14. The electrochromic device as in claim 13, wherein said primer layer is selected from acrylates, polyurethanes, urethane acrylates, epoxies, epoxy acrylates, zirconium silicates and SiO_x, and mixtures thereof.

15. An electrochromic device comprising:

a first substrate having at least one polymeric surface;

a primer layer along said polymeric surface, wherein said primer layer is selected from polyurethanes, urethane acrylates, and zirconium silicates and mixtures thereof;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.

16. The electrochromic device as in claim 15, wherein each of said first and second electrically conductive coatings is selected from tin oxide, indium tin oxide, fluorine doped tin oxide, antimony doped tin oxide, IMI and mixtures thereof.

17. An electrochromic device comprising:

a first substrate having at least one polymeric surface;

a primer layer along said polymeric surface, wherein said primer layer is selected from a carbonate diol-based cross linked polyurethane;

a terpolymer of cyanoethylacrylate, hydroxyethylacrylate and acrylic acid;

a terpolymer of cyanoethylacrylate, 2-ethylhexylacrylate and acrylic acid; and

a terpolymer of zirconium alkoxide, colloidal silica and acrylate silane;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent; and

an electrochromic medium contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.

18. An electrochromic device comprising:

a first substrate having at least one polymeric surface;

a primer layer along said polymeric surface, wherein said primer layer comprises a carbonate diol-based cross linked polyurethane;

a first electrically conductive transparent coating along said primer of said first substrate, wherein said primer layer adheres said first electrically conductive coating to said polymeric surface of said first substrate;

a second substrate spaced apart from the first substrate to define a chamber there between;

a second electrically conductive transparent coating on a surface of said second substrate such that said first coating is in facing relation to said second coating, wherein at least one of said first and second substrates is transparent; and

an electrochromic medium comprising a polyurethane contained in said chamber, said electrochromic medium having reduced luminous transmittance upon application of electrical power to said first and second conductive coatings and establishing an electrical potential through said electrochromic medium, and wherein said electrochromic medium and said primer layer are compatible.