Metallic copper dispersion, method for producing the same, electrode formed using the same, wiring pattern, coating film, decorative article formed with the coating, antibacterial article, and method for producing the same
Provided is a dispersion containing at least metallic copper particles having gelatin on the particle surface, a polymer dispersant, and an organic solvent. This dispersion is obtained by reducing the copper oxide in an aqueous solvent in the presence of gelatin having a difference between the amine value and the acid value (amine value-acid value) of 0 or less, followed by solid-liquid separation. It is produced by mixing metallic copper particles having gelatin on the particle surface and a polymer dispersant having a difference between amine value and acid value (amine value-acid value) of 0 to 50 in an organic solvent. Dispersion stability of metallic copper particles can be maintained for a long period of time, suitable for inkjet printing, spray coating, etc., forming fine electrodes such as printed wiring boards and circuit wiring patterns, and design and decoration applications utilizing the metallic color of the coating film Used for etc.少なくとも、ゼラチンを粒子表面に有する金属銅粒子、高分子分散剤及び有機溶媒を含む分散液を提供する。この分散液は、アミン価と酸価の差（アミン価－酸価）が０以下であるゼラチンの存在下、水系溶媒中で銅酸化物を還元した後、固液分離し、次いで、得られたゼラチンを粒子表面に有する金属銅粒子と、アミン価と酸価の差（アミン価－酸価）が０～５０である高分子分散剤を有機溶媒に混合して製造される。金属銅粒子の分散安定性を長期間維持でき、インクジェット印刷、スプレー塗装等に好適であり、プリント配線基板等の微細電極及び回路配線パターンの形成、塗膜の金属色調を活用した意匠・装飾用途等に用いられる。
