Patent ID: 8558221

Claim:
A polymer comprising a repeating unit A and a repeating unit B, wherein the repeating unit A is selected from divalent groups which are derived from compounds represented by formula (1): wherein Ar 1 to Ar 4 are each independently a substituted or unsubstituted aryl group having 6 to 40 ring-forming carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 ring-forming atoms, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; X is a substituted or unsubstituted aryl group having 6 to 40 ring-forming carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 ring-forming atoms, or a substituted or unsubstituted styrene-derived group; s is an integer of 0 to 3; and two or three —NAr 3 Ar 4 groups may be the same or different when s is 2 or 3; and —NAr 3 Ar 4 is a hydrogen atom when s is 0; and the repeating unit B is selected from divalent groups which are derived from compounds represented by any one of formulae (2) to (6): wherein R is a substituted or unsubstituted aryl group having 6 to 40 ring-forming carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 40 ring-forming atoms, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; a is an integer of 0 to 6; b is an integer of 0 to 8; and c is an integer of 0 to 10.