Patent ID: 6841269

Claim:
A hole transporting polymer comprising a repeating structural unit represented by the following general formula (1), and having a polystyrene-reduced number-average molecular weight of from 10 3 to 10 7 : wherein R 1 represents an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 30 carbon atoms; Ar 1 represents an arylene group having 6 to 30 carbon atoms, or an arylene ethenylene group represented by the following general formula (2); Ar 2 and Ar 3 independently represent an aryl group having 6 to 30 carbon atoms, an aromatic amine group represented by the following general formula (3), or an arylene ethenylene group represented by the following general formula (4): wherein Ar 4 and Ar 5 independently represent an arylene group having 6 to 30 carbon atoms; and R 2 and R 3 independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 30 carbon atoms: wherein Ar 6 represents an arylene group having 6 to 30 carbon atoms; R 4 and R 5 independently represent an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 30 carbon atoms, wherein Ar 7 represents an arylene group having 6 to 30 carbon atoms; R 6 and R 7 independently represent hydrogen atom, an alkyl group having 1 to 20 carbon atoms, or an aryl group having 6 to 30 carbon atoms; Ar 8 represents an aryl group having 6 to 30 carbon atoms.