Patent ID: 8287771

Claim:
A method for producing a dispersion of a silver particle powder in a liquid organic medium having a low polarity, which comprises reducing a silver compound in an alcohol having a boiling point of from 80Â° C. to 200Â° C. or in a polyol having a boiling point of from 150 to 300Â° C. under a co-presence of an organic protective agent of a primary amine having an unsaturated bond in a structure thereof and having a molecular weight of from 100 to 1000, at a temperature of from 80Â° C. to 200Â° C. under reflux while a liquid phase stream is maintained to have a Reynolds number of not more than 3.70Ã—10 4 , thereby obtaining a slurry containing the silver particle powder, separating the silver particle powder from the slurry, and dispersing the powder in the liquid organic medium thereby obtaining the dispersion of the silver particle powder having the properties of a Newtonian fluid as follows: pH: at least 6.5, silver concentration in dispersion: from 5 to 90 wt.%, viscosity: at most 50 mPaÂ·s, and surface tension: at most 80 mN/m, wherein the stream having a Reynolds number of not more than 3.70Ã—10 4 is kept in a natural convection.