BENZENESULFONIC ACID DERIVATIVE COMPOUNDS, PROCESS FOR PRODUCING THE SAME, AND USE THEREOF

摘要

A benzosulfonic acid derivative compound which is utilized as a dopant for electron-conjugated polymer and are expressed by the following formula. Wherein X is hydrogen or hydroxyl group, and R3 and R4 each are hydrogen, alkyl group, etc. Examples of the compound include 3-sulfobenzamide, 3-sulfobenzoylurea, N-methyl-3-sulfobenzamide, and 5-sulfosalicylamide. Doping an electron-conjugated polymer with the compound gives a conducting polymeric material which has high conductivity and excellent heat resistance and is usable as a conducting material suited to a cathode in a solid electrolytic capacitor.