| 摘要 |
PURPOSE:To provide the titled composition having excellent electrical conductivity, and useful for the formation of layer for shielding the electromagnetic wave emission of a computer, etc., by treating electrolytic copper powder with an organic carboxylic acid, and compounding the product as the electrically conductive filler with a binder resin and an organic solvent. CONSTITUTION:The objective composition can be prepared by compounding (A) an electrically conductive filler obtained by washing (i) electrolytic copper powder having a particle size distribution characterized in that >=80wt% of the copper powder passes through the 350 mesh sieve, and having an apparent density of 0.5-1.5g/cm<3> and a specific surface area of >=2,000cm<3>/g (by sub-sieve sizing method) with (ii) an organic carboxylic acid (preferably citric acid), and drying the product, with (B) a binder resin (e.g. acrylic resin) and (C) an organic solvent (e.g. xylene, etc.).
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