Precursor solutions for forming coatings

  • US 5,525,264 A
  • Filed: 06/02/1995
  • Issued: 06/11/1996
  • Est. Priority Date: 07/15/1992
  • Status: Expired due to Fees
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First Claim
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1. A precursor solution for forming a precursor coating which can be converted to an electrochromic coating on a substrate, said solution comprising:

  • a carrier solvent, which is removable from said solution at a first temperature;

    an electrochromic precursor, which can be converted to an electrochromic material at a second temperature; and

    a removable organic moiety, wherein (i) said organic moiety has a decomposition temperature sufficiently greater than said first temperature such that said organic moiety remains integral with said precursor coating when said carrier solvent is removed, (ii) said organic moiety has a decomposition temperature or boiling point less than or equal to said second temperature such that removal of said organic moiety occurs prior to or concurrently with the formation of said electrochromic coating, and (iii) said organic moiety is selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, formamide and glycerol.

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