Coating processes – Particles – flakes – or granules coated or encapsulated – Solid encapsulation process utilizing an emulsion or...
Patent
1997-12-05
2000-06-27
Sellers, Robert E.
Coating processes
Particles, flakes, or granules coated or encapsulated
Solid encapsulation process utilizing an emulsion or...
42721332, 42721334, 42721336, 252514, 523200, 523202, 523205, 523459, B01J 1320, B05D 714
Patent
active
060804432
ABSTRACT:
A process for producing a MC-type conductive filler includes treating minute metallic particles with a coupling agent, preparing an oil phase of the coupling agent-treated minute metallic particles and a reactive substance A, the reactive substance A directly contacting the metallic particles. Then, an aqueous phase is prepared having a reactive substance B, which is capable of reacting with the reactive substance A, dissolved in water. Thereafter, the oil phase is dispersed in the aqueous phase to form a suspension. In situ reaction of the reactive substances A and B is then caused by applying heat to the suspension or adding a catalyst to the suspension. This forms a coating of a thermosetting insulating resin on the surface of the minute metallic particles. Alternatively, the reactive substance B may not be used. A MC-type conductive filler may also be made by immersing minute metallic particles in an affinity agent, immersing and dispersing the affinity agent treated-particles in an epoxy monomer and polymerizing the monomer to form an insulating polymer on the surface of the minute metallic particles.
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Date Hiroaki
Hozumi Yuko
Usui Makoto
Watanabe Isao
Fujitsu Limited
Sellers Robert E.
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