| 摘要 |
PURPOSE:To obtain non-oxidizable finely divided metal particles coated with a dye, by treating the surfaces of finely divided metal particles with the solution of a dye in a solvent, and drying the treated particles. CONSTITUTION:Finely divided metal paticles to be treated include particles of all easily oxidizable metallic substances including usual metals, and alloys, and there is no limit to the configuration, but it is desirable to use metal particles having a large surface area, for example, of 40cm<2>/1cm<3>. The dye includes direct dyes, acid dyes, basic dyes, mordant dyes, sulfur dyes, vat dyes, disperse dyes, oil-soluble dyes, reactive dyes and fluorescent whiteners. As the solvent can be used alcohol type solvents, aliphatic hydrocarbon type solvents, aromatic hydrocarbon type solvents, ketone type solvents, etc. One or more dyes in an amount of 0.05-5wt% are dissolved in a solvent, and then finely divided metal particles are treated with the obtained solution, and are dried at room temperatures or 150 deg.C or below. |
