Stable ferrofluid compositions and method of making same

摘要

A stable liquid composition which comprises a colloidal dispersion of finely-divided particles in a liquid silicone-oil carrier and a dispersing amount of a surfactant, which surfactant comprises a silicone-oil surfactant containing a functional group which forms a chemical bond with the surface of the particles and a tail group which is soluble in the silicone-oil carrier, to provide a stable ferrofluid composition.