MANUFACTURING METHOD OF COPPER PARTICULATE DISPERSION LIQUID, AND COPPER PARTICULATE DISPERSION LIQUID

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a copper particulate dispersion liquid in which the copper particulates modified by an aliphatic amine is dispersible in a high concentration in a specific dispersion liquid and which is excellent in dispersion stability for a long period of time, and a copper particulate dispersion liquid. SOLUTION: The method includes: (i) a step of adding a flocculation agent to an aqueous copper particulate dispersion liquid in which portions of copper particulates of a mean grain size 1 to 150 nm of primary particles are covered with a dispersant and are dispersed in the aqueous liquid and recovering the copper particulates; (ii) a step of adding the copper particulates into an aliphatic amine or a modification agent liquid composed of a liquid dissolved with the aliphatic amine in an organic liquid to obtain a dispersion liquid of the copper particulates in which the surfaces of the copper particulates are modified by the aliphatic amine under stirring; (iii) a step of adding the flocculation agent to the dispersion liquid, and recovering the modified copper particulate; and (iv) a step of obtaining the copper particulate by redispersing the modified copper particulates into the one or two or more dispersion liquids selected from chloroform. Limonene, and diol. COPYRIGHT: (C)2010,JPO&INPIT