Patent ID: 6532098
Filing Date: 2003-03-11
Classification: C09K,G02F,Y10T

Abstract:
An electrochromic element 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 comprising a compound represented by formula (1) or a derivative thereof; formula (1) being represented by the formula: wherein R1, R2, R3, R4 and R5 are each independently selected from the group consisting of hydrogen and a hydrocarbon residue having from 1 to 20 carbon atoms, Ar1 and Ar2 are each independently a divalent aromatic hydrocarbon residue, and a is an integer of 0 or greater; into a composition containing a monofunctional acryloyl-modified polyalkylene oxide represented by formula (18) and at least one polyfunctional acryloyl-modified polyalkylene selected from the group consisting of compounds represented by formulae (19) and (20), a polar solvent and a supporting electrolyte; formula (18), (19) and (20) being represented by the formulae: wherein R27, R28, and R29 are each independently selected from the group consisting of hydrogen and an alkyl group having from 1 to 5 carbon atoms, R30 is an alkyl group having from 1 to 5 carbon atoms, and j is an integer 2 to 30; wherein R31, R32, R33, and R34 are each selected from the group consisting of hydrogen and an alkyl group having from 1 to 5 carbon atoms and k is an integer 2 to 30; wherein R35, R36, and R37 are each selected from the group consisting of hydrogen and an alkyl group having from 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.