| 摘要 |
Blending an electrically active, anodically coloring, electrochromic polymer with a non-electrochromic, non-electrically conductive binder polymer greatly enhances the performance of the anodically coloring, electrochromic polymer in an electrochromic device over time. In addition to improved physical characteristics of the blend, e.g., film build, durability etc, the coloristic properties, including color space and color strength, of the device comprising the blend are more durable than when using the neat polymer, and in certain instances, the color space and color intensity provided by the blend is superior to that available from the neat polymer. |
| 主权项 |
1. An electrochromic device comprising, as an electroactive color changing component, an anodically coloring electrochromic composition, which composition comprises an electrically active, anodically coloring polymer blended with a non-electrically conductive binder polymer in a single layer; wherein the anodically coloring polymer is a polypyrrole polymer comprising as a repeating unit a moiety with the formula wherein X═Y═O, R is C1-24 alkyl or alkyl interrupted by one or more oxygen atoms or carbonyl, ester, amino or amido linkages, which alkyl or interrupted alkyl may also be substituted one or more times by one or more aromatic or heterocyclic ring, OH, OAcyl, O-alkyl, amino, amido, CN, halogen, COOH, carboxylic ester, amino salt, carboxylate salt or phosphorous salt, each A is independently H, C1-24 alkyl or alkyl interrupted by one or more oxygen atoms or carbonyl, ester, amino or amido linkages, which alkyl or interrupted alkyl may also be substituted one or more times by one or more aromatic or heterocyclic ring, OH, OAcyl, O-alkyl, amino, amido, CN, halogen, COOH, carboxylic ester, amino salt, carboxylate salt or phosphorous salt and A′ is C1-6 alkylene or alkylene interrupted and/or substituted as for A; wherein the non-electrically conductive binder polymer is selected from acrylate, acrylamide, polyether, polyamide, polyurethane, polyolefin, polyvinyl alcohol, fluoro polymers, styrenic, melamine and polyurethane resins and the single layer is greater than 1 micron thick and the single layer comprises a wt. ration of binder to anionically coloring polymer ranging from 75:25 to 25:75. |
