Patent ID: 6806989
Filing Date: 2004-10-19
Classification: C09K,G02F,Y10T

Abstract:
An electrochromic device comprising:(a) a pair of glass plates or a pair of plastic plates or a pair of plastic films, wherein (A) both plates or both films are transparent and at least one plate has a side with a transparent electrically conductive coating that is optionally divisible into separate, individually contacted area segments or (B) (i) one plate or one film is transparent, (ii) the other plate or film is mirrored and (iii) at least one plate or at least one film has a transparent, electrically conductive coating that is optionally divisible into separate, individually contacted area segments and, (b) a sealing ring for joining together the plates or the films on the sides having an conductive coating, wherein the two plates or films and the sealing ring form a volume, and (c) an electrochromic medium for filling the volume, wherein the electrochromic medium includes at least one oxidizable electrochromic substance RED1 and at least one reducible electrochromic substance OX2, wherein the substance RED1 is an electrochromic compound of the formula (CC): whereinA is an aromatic or a quasi-aromatic, heterocyclic 5- or 6-membered ring in which X201 is located in the 2- or 4-position relative to the point of attachment, B is an aromatic or a quasi-aromatic, carbocyclic or heterocyclic 5- or 6-membered ring in which Y201 is located in the 2- or 4-position relative to the point of attachment, X201 is NR201, O or S, Y201 is NR202R203, OR204 or SR205, Z201 to Z203, independently of one another, are carbon or nitrogen, R201 to R205, independently of one another, are alkyl, alkenyl, cycloalkyl, aralkyl or aryl, and R202 to R205 may additionally be hydrogen, is an integer from 0 to 3, and Z201 to Z203 may form a bridge with one another or with the rings A and/or B, and/or the substance OX2 used is an electrochromic compound of the formula (CCl) whereinC is an aromatic or a quasi-aromatic, heterocyclic 5- or 6-membered ring in which X202 is located in the 2- or 4-position relative to the point of attachment, D is an aromatic or a quasi-aromatic, carbocyclic or heterocyclic 5- or 6-membered ring in which Y202 is located in the 2- or 4-position relative to the point of attachment, or is &boxH;C(CN)2, &boxH;C(CN)COOalkyl or &boxH;C(COOalkyl)2, X202 is N+R206, O+ or S+, Y202 is NR207, O, S, Nâ€”CN or C(CN)2, Z204 to Z206, independently of one another, are carbon or nitrogen, R206 and R207, independently of one another, are alkyl, alkenyl, cycloalkyl, aralkyl or aryl, j is an integer from 0 to 3, and Z204 to Z206 may form a bridge with one another or with the rings C and/or D, wherein the rings A, B, C and D may carry further substituents.