Patent ID: 6538792
Filing Date: 2003-03-25
Classification: C09K,G02F,H01B,Y10T

Abstract:
An electrochromic device comprising two electrically conductive substrates, at least one of which is transparent, and an ion conductive substance layer disposed therebetween and comprising a mixture obtained by dispersing an electrochromic substance represented by formula (1) below into a composition containing a monofunctional acryloyl-modified polyalkylene oxide represented by formula (17) and a polyfunctional acryloyl-modified polyalkylene oxide represented by formula (18) or (19), a polar solvent and a supporting electrolyte; formula (1) being represented by wherein Xâˆ’ and Yâˆ’ are the same or different and are each a counter anion selected from the group consisting of a halogen anion, ClO4âˆ’, BF4âˆ’, PF4âˆ’, CH3COOâˆ’ and CH3(C6H4)SO3âˆ’ and R1 and R2 are the same or different and are each a hydrocarbon group having from 1 to 20 carbon atoms; formula (17) being represented by wherein R27, R28, and R29 are each selected from the group consisting of hydrogen and an alkyl group having 1 to 5 carbon atoms, R30 is an alkyl group having 1 to 5 carbon atoms, and j is an integer of 2 to 30;formula (18) being represented by wherein R31, R32, R33, and R34 are each selected from the group consisting of hydrogen and an alkyl group having 1 to 5 carbon atoms, and k is an integer of 2 to 30; and formula (19) being represented by wherein R35, R36, and R37 are each selected from the group consisting of hydrogen and an alkyl group having 1 to 5 carbon atoms, l is an integer of 2 to 30, m is an integer of 2 to 4 and L is a connecting group having a valence corresponding to m.