| 摘要 |
PROBLEM TO BE SOLVED: To provide a photocurable conductive ink composition for screen printing, which has good printability, printing accuracy and adhesiveness to a substrate, is suitable for screen printing, and can exhibit stable conductive characteristics.SOLUTION: The photocurable conductive ink composition for screen printing comprises (A) a conductive filler, (B) a photopolymerizable resin precursor comprising oligomers of urethane acrylates, monofunctional acrylates and polyfunctional acrylates, (C) an alkyd resin, (D) two or more types of photopolymerization initiators, and (E) a polymer dispersant. The compounded amount of the (A) conductive filler is 70 to 90 mass% with respect to the total mass of the photocurable conductive ink composition; and 50 mass% or more of the conductive filler comprises silver powder in a form of scales, foils or flakes having a 50% particle diameter of 0.3 to 3.0 μm in the grain size distribution. The total compounded amount of the (B) photopolymerizable resin precursor is 10 to 24 mass% with respect to the total mass of the photocurable conductive ink composition; and the compounded amount of the oligomers of urethane acrylates is 5 mass% or less with respect to the total mass of the photocurable conductive ink composition. The compounded amount of the (C) alkyd resin is 1 to 10 mass% with respect to the total mass of the photocurable conductive ink composition. |
