Patent ID: 8841411

Claim:
A polymer comprising repeating unit(s) of the following formula R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently of each other hydrogen, F, SiR 100 R 101 R 102 , or an organic substituent, or R 1 and R 2 , R 3 and R 4 , and/or any of the substituents R 1 , R 2 , R 3 , R 4 , R 5 and/or R 6 , which are adjacent to each other, together form an aromatic, or heteroaromatic ring, or ring system, which can optionally be substituted, m is 0, or an integer of 1, or 2, n1 and n2 are 0, or an integer 1, or 2, R 100 R 101 R 102 are independently of each other C 1 -C 18 alkyl, substituted or unsubstituted C 6 -C 18 aryl, and Ar 1 and A 2 are each independently of each other a substituted or unsubstituted arylene, or heteroarylene group, with the proviso that at least one of R 1 , R 2 , R 3 and R 4 is different from H, and wherein the polymers have a weight average molecular weight of 2,000 Daltons or greater.