Patent ID: 8337726
Filing Date: 2012-12-25
Classification: B22F,B82Y,C01P,C09C,C09D,H05K

Abstract:
1. A fine particle dispersion, in which a fine particle (P) comprised of one type or not less than two types of a metal, an alloy, and/or a metallic compound, having a mean particle diameter between 1 nm and 150 nm for primary particles thereof, and having a surface at least a part thereof coated with a polymer dispersing agent (D), is dispersed in a mixed organic solvent, wherein a weight ratio of (D/P) between the polymer dispersing agent (D) coating the surface of the fine particle (P) and the fine particle (P) in the dispersion is between 0.001 and 10, the mixed organic solvent is one of: (i) a mixed organic solvent (S1) which contains at least an organic solvent (A) having an amide group as between 50% and 95% by volume, and a low boiling point organic solvent (B) having a boiling point between 20° C. and 100° C. at a normal pressure as between 5% and 50% by volume; (ii) a mixed organic solvent (S2) which contains at least the organic solvent (A) having the amide group as between 50% and 95% by volume, and an organic solvent (C) having a boiling point higher than 100° C. at the normal pressure and comprised of an alcohol and/or a polyhydric alcohol having one or not less than two hydroxyl groups in a molecule thereof as between 5% and 50% by volume; or (iii) a mixed organic solvent (S3) which contains at least the organic solvent (A) having the amide group as between 50% and 94% by volume, the low boiling point organic solvent (B) having the boiling point between 20° C. and 100° C. at the normal pressure as between 5% and 49% by volume, and the organic solvent (C) having the boiling point of higher than 100° C. at the normal pressure and comprised of the alcohol and/or the polyhydric alcohol having the one or not less than the two hydroxyl groups in the molecule thereof as between 1% and 45% by volume, and the organic solvent (A) is one type or not less than two types selected from N-methylacetamide, N-methylformamide, and N-methylpropanamide.