Patent ID: 6728022
Filing Date: 2004-04-27
Classification: C08F,G02F

Abstract:
An electrochromic device having an ion conductive layer between a pair of electrically conductive substrates at least one of which is transparentwherein said ion conductive layer contains an electrochromic polymer which is a reaction product of a polymer having reactive groups and an organic compound having both a structure exhibiting cathodic electrochromic properties and a structure exhibiting anodic electrochromic properties and functional groups reactive to said reactive groups and wherein said structure exhibiting cathodic electrochromic properties is a bipyridinium ion pair structure represented by formula (1) below and said structure exhibiting anodic electrochromic properties is a metallocene structure represented by formula (2) or (3) below: wherein Xâˆ’ and Yâˆ’ are the same or different and are each independently a pair-anion selected from the group consisting of a halogen anion, ClO4âˆ’, BF4âˆ’, PF6âˆ’, CHCOOâˆ’, and CH3(C6H4) SOâˆ’; and wherein R1 and R2 are the same or different and are each independently a hydrocarbon group selected from the group consisting of an alkyl group, an alkenyl group and an aryl group having 1 to 10 carbon atoms, in the case where R1 or R2 is an aryl group, the aryl group may form a condensed ring together with a cyclopentadienyl ring, m is an integer of 0&lE;m&lE;4, n is an integer of 0&lE;n&lE;4, and Me represents Cr, Co, Fe, Mg, Ni, Os, Ru, V, Xâ€”HFâ€”Y, Xâ€”Moâ€”Y, Xâ€”Nbâ€”Y, Xâ€”Tiâ€”Y, Xâ€”Vâ€”Y or Xâ€”Zrâ€”Y wherein X and Y are each independently selected from the group consisting of hydrogen, a halogen group and an alkyl group having 1 to 12 carbon atoms.