Process for producing fine copper flakes

Details Process for producing fine copper flakes Process for producing fine copper flakes

1989-01-03

1989-12-05

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

By utilizing kinetic energy of projected or suspended material

241 16, 241 21, 241 29, B02C 1912

Patent

active

048847542

ABSTRACT:
A process is disclosed for producing fine copper flakes which comprises media milling copper powder particles with one or more organic surfactants in a non-polar organic medium to comminute the copper particles and produce intermediate flakes having a thickness of less than about 3 micrometers, removing the major portion of the organic medium and the organic surfactants from the intermediate flakes to produce dried intermediate flakes, and fluid energy milling the intermediate flakes to reduce the diameter of the dried intermediate flakes and produce flakes having a diameter of no greater than about 10 micrometers in diameter.

REFERENCES:
patent: 3186648 (1965-06-01), Mandle et al.
patent: 4318747 (1982-03-01), Ishijima et al.
patent: 4784333 (1988-11-01), Hikake et al.

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