Patent ID: 8323804

Claim:
A polymer comprising (1) from 5 to 70 mol % of a first repeating unit of formula (I), wherein R identically or differently on each occurrence is F; Cl; Br; I; CN; NO 2 ; OH; N(R 1 ) 2 ; Si(R 1 ) 3 ; B(R 1 ) 2 ; a straight-chain alkyl, straight-chain alkoxy or straight-chain thioalkoxy group having up to 40 carbon atoms; or a branched or cyclic alkyl, branched or cyclic alkoxy or branched or cyclic thioalkoxy group having from 3 to 40 carbon atoms; wherein one or more nonadjacent carbon atoms in said straight-chain alkyl, straight-chain alkoxy, straight-chain thioalkoxy, branched or cyclic alkyl, branched or cyclic alkoxy, and branched or cyclic thioalkoxy groups is optionally replaced by —CR 1 ═CR 1 —, —C≡C—, —NR 1 —, —O—, —S—, —CO—O—, C═O, P(═O)R 1 , SO, SO 2 or —O—CO—O0-, and wherein one or more H atoms is optionally replaced by fluorine, or an aromatic or heteroaromatic ring system having from 5 to 40 aromatic carbon atoms, wherein said aromatic or heteroaromatic ring system is optionally substituted by one or more nonaromatic radicals R; or a combination of 2, 3, 4, or 5 of these groups; and wherein two or more radicals R optionally define an aliphatic or aromatic monocyclic ring system or an aliphatic or aromatic polycyclic ring system; R 1 identically or differently on each occurrence is H or an aliphatic or aromatic hydrocarbon radical having up to 20 carbon atoms; n identically or differently on each occurrence is 0, 1, 2, 3, or 4; and the bonds shown as broken lines indicate the linkage in the polymer; and (2) from 95 to 30 mol % of a second repeating unit which is different from the repeating unit of formula (I).