New bisazo - compounds, processes for their preparation and with the use of these compounds, bisazo - electrophotographic recording materials produced

摘要

a new bisazo compound of general formula (i) $f1 in the r1 and r2 for each hydrogen atom, a lower alkylrest with 1 to 4 carbon atoms, a substituted or unsubstituierte aralkyl group, an aromatic group