Patent ID: 7323538

Claim:
A polymer compound of formula I, having a functional group comprising a cyclic ring with aromatic properties, said functional group comprising C and H and/or C, H, and X, in a side-chain, said polymer compound having a number average molecular weight of 250-1,000,000, said polymer compound having a molar extinction coefficient due to a cyclic part having these aromatic properties of 30% or more lower than a molar extinction coefficient due to the cyclic part having said aromatic properties in a polymerizing monomer used to introduce the cyclic part having said aromatic properties, wherein in formula I Ar is a cyclic ring having aromatic properties, and may form a heterocyclic ring, R 1 and R 2 , are hydrogen atoms, alkyl groups, —OR, aromatic groups, —NRR′, halogen, R 5 and R 6 are hydrogen atoms, alkyl groups, aromatic groups, —CN or ester groups R, R′ are H or alkyl groups having 1-50 carbon atoms, X is not present, or is —CH 2 —, —CH 2 —CH 2 —, —CH═CH—, —C(═O)— or a hetero atom, and m is 2 or more, said polymer compound having optical properties