Electrochromic polymeric solid films, manufacturing electrochromic devices using such solid films, and processes for making such solid films and devices

  • US 6,002,511 A
  • Filed: 01/14/1998
  • Issued: 12/14/1999
  • Est. Priority Date: 02/26/1993
  • Status: Expired due to Fees
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First Claim
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1. An electrochromic window device suitable for use in a vehicle or building comprising:

  • (a) a first transparent rigid substrate having a transparent conductive layer on a surface thereof;

    (b) a second transparent rigid substrate having a transparent conductive layer on a surface thereof, said conductive layer of said first substrate opposing said second conductive layer of said second substrate in a spaced-apart relationship thereby forming an interpane distance between said substrates;

    (c) a boundary seal interposed between said first and second substrates spacing apart said substrates and forming a cavity wherein said interpane distance is at least about 10 μ

    m and wherein said boundary seal forms a weather barrier for said cavity;

    (d) an electrochromic cross-linked polymeric solid film within said cavity, said electrochromic cross-linked solid polymeric film formed by curing within said cavity an electrochromic monomer composition that includes at least one of (A) a monofunctional monomer and a cross-linking agent and (B) a polyfunctional monomer capable of cross-linking, and further including (i) at least one anodic electrochromic compound;

    (ii) at least one cathodic electrochromic compound;

    (iii) a plasticizer; and

    (e) a means for introducing an applied potential to said electrochromic cross-linked polymeric solid film to controllably cause a variation in the amount of light transmitted through said device.

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