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Nippon Patents Coated Conductive Powder and Adhesive

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By: KERRY PIANOFORTE

Editor, Coatings World, Coatings World

U.S. 8,262,940 B2
Nippon Chemical Industrial Co. has obtained a patent for a coated conductive powder obtained by coating the surfaces of conductive particles with insulating inorganic fine particles, wherein the volume resistivity value of the coated conductive powder is 1 Ω·cm or less, the specific gravity of the insulating inorganic fine particles is 5.0 g/ml or less, the particle diameter ratio of the insulating inorganic fine particles to the conductive particles is 1/100 or less, and the insulating inorganic fine particles adhere to the surfaces of the conductive particles, wherein the coated conductive powder satisfies n=4×104 to 3×1010, in the following formula: the amount of the insulating inorganic fine particles added (g) with respect to 1 g of the conductive particles n×(r23×d2)/(r13×d1) where n is a constant; r1 is a radius of the conductive particles; d1 is a specific gravity of the conductive particles; r2 is a radius of the insulating inorganic fine particles; and d2 is a specific gravity of the insulating inorganic fine particles.

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