Abstract: The present invention manufactures titanium oxide particles that have a small degree of aggregation (size of aggregate particle diameter relative to primary particle diameter) and are not readily sintered by heating. The present invention has: a step in which an alkali and a solution including a carboxylic acid and a titanium (oxy)chloride are mixed, and the titanium (oxy)chloride is hydrolyzed by neutralization; and a step in which, after the hydrolysis by neutralization, the solution is heated to a temperature of 80° C. or more and 110° C. or less, and the titanium (oxy)chloride remaining in the solution is hydrolyzed by heating.

Abstract: The purpose of the present invention is to provide a metallic copper dispersion: capable of maintaining dispersion stability of metallic copper particles for a long period of time; suitable for inkjet printing, spray coating, or the like; and capable of allowing a metallic copper-containing film having an excellent electrical conductivity and metallic color tone to be manufactured in a simple manner by performing low-temperature heating or plasma irradiation after application. The metallic copper dispersion is a dispersion containing at least an organic solvent, a polymer dispersant, and metallic copper particles having gelatin on the particle surface, wherein the metallic copper particles in the dispersion have a cumulative 50% particle size (D50) of 1-130 nm and a cumulative 90% particle size (D90) of 10-300 nm, and the polymer dispersant has an amine number of 10-150 mgKOH/g.

Abstract: A dispersion comprising at least metallic copper particles with gelatin provided on the surface thereof, a polymeric dispersant, and an organic solvent. The dispersion is produced by reducing copper oxide in an aqueous solvent in the presence of gelatin having an amine number and an acid number wherein the difference (amine number?acid number) is 0 or less, then subjecting the reaction solution to solid-liquid separation, and then mixing the resultant metallic copper particles with gelatin provided on the surface thereof and a polymeric dispersant having an amine number and an acid number wherein the difference (amine number?acid number) is 0 to 50, into an organic solvent. The dispersion maintains dispersion stability of the metallic copper particles for a long time, is suitable for inkjet printing and spray coating and can be used to make microelectrodes and circuit wiring patterns.

Abstract: Provided are: metallic copper particles exhibiting excellent low-temperature sintering properties at temperatures equal to or lower than 300° C.; and a production method therefor. In these metallic copper particles, metallic copper fine particles are adhered to the surfaces of large-diameter metallic copper particles. With regard to the metallic copper particles to be produced, copper oxide and hypophosphoric acid and/or a salt thereof are mixed and reduced, preferably in the presence of 1-500 mass % of gelatin and/or collagen peptide. The reduction reaction temperature is preferably in the range of 20-100° C. The produced metallic copper particles have a volume resistivity value when heated to a temperature of 300° C. under a nitrogen atmosphere of 1×10-2 ?·cm or less.

Abstract: The purpose of the present invention is to provide a metallic copper dispersion: capable of maintaining dispersion stability of metallic copper particles for a long period of time; suitable for inkjet printing, spray coating, or the like; and capable of allowing a metallic copper-containing film having an excellent electrical conductivity and metallic color tone to be manufactured in a simple manner by performing low-temperature heating or plasma irradiation after application. The metallic copper dispersion is a dispersion containing at least an organic solvent, a polymer dispersant, and metallic copper particles having gelatin on the particle surface, wherein the metallic copper particles in the dispersion have a cumulative 50% particle size (D50) of 1-130 nm and a cumulative 90% particle size (D90) of 10-300 nm, and the polymer dispersant has an amine number of 10-150 mgKOH/g.

Abstract: Disclosed is a dispersion comprising at least metallic copper particles with gelatin provided on the surface thereof, a polymeric dispersant, and an organic solvent. The dispersion is produced by reducing copper oxide in an aqueous solvent in the presence of gelatin having an amine number and an acid number such that the difference therebetween (amine number?acid number) is 0 or less, then subjecting the reaction solution to solid-liquid separation, and then mixing the resultant metallic copper particles with gelatin provided on the surface thereof and a polymeric dispersant having an amine number and an acid number such that the difference therebetween (amine number?acid number) is 0 to 50, into an organic solvent.