| 摘要 |
PROBLEM TO BE SOLVED: To achieve cost reduction by reducing the addition amount of silver powders because the addition amount of silver powders in an electroconductive composition required to obtain electroconductivity of 5.0×10to 1.0×10Ω/cm is 70-80% of the total solid component in an electroconductive material.SOLUTION: The electroconductive composition contains: (1) polyaniline synthesized by oxidative polymerization of (d) aniline in the presence of (a) a petroleum solvent, (b) an aqueous solution of phosphoric acid, and (c) a surfactant containing a sulfonic acid group; (2) electroconductive fine particles; and (3) a compound including a phenolic hydroxy group, wherein the aqueous solution of phosphoric acid has pH of 2-5, and the polyaniline has a weight-average molecular weight of 30,000-60,000. |
