Patent ID: 7767785
Filing Date: 2010-08-03
Classification: C08G,H01L,Y02E

Abstract:
1. A polymer comprising at least 5 mol % of units of the formula (1), where the symbols used have the following meanings: X is identical or different on each occurrence and is in each case CR Z is identical or different on each occurrence and is in each case CR or N; R is identical or different on each occurrence and is in each case H, a linear, branched or cyclic alkyl or alkoxy chain which has from 1 to 22 carbon atoms and in which one or more nonadjacent carbon atoms may also be replaced by N(R R n is identical or different on each occurrence and is in each case 0 or 1; characterized in that the polymer further comprises at least 0.01 mol %, of units of the formula (2), where the symbols and indices have the following meanings: A is identical or different on each occurrence and is in each case S, O or N(R Z is identical or different on each occurrence and is in each case CR* or N, with the proviso that the central unit (II) is not a quinoxaline, not a benzothiadiazole and not an unsubstituted anthracene and with the further proviso that at least one radical R* is not hydrogen; R* is identical or different on each occurrence and is in each case H, a linear, branched or cyclic alkyl or alkoxy chain which has from 1 to 22 carbon atoms and in which one or more nonadjacent carbon atoms may also be replaced by N(R m is identical or different on each occurrence and is in each case 1, 2 or 3; the further symbols are as described under the formula (1); and the broken-line bond in formula (1) and formula (2) as in all further formulae indicates the linkage in the polymer.