Powder for magnetic recording media and process for manufacturin

Details Powder for magnetic recording media and process for manufacturin Powder for magnetic recording media and process for manufacturin

1983-09-28

1986-03-25

Lesmes, George F.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428407, 428408, 428480, 428694, 428900, 427130, 427228, 148105, B32B 1902, G11B 5712

Patent

active

045783136

ABSTRACT:
A powder for a magnetic recording medium comprising a plurality of magnetic particles and a coating covering the surfaces of the magnetic particles. The coating is a residue resulting from the thermal decomposition of an organic material. The powder is manufactured by applying one or more organic materials to the surfaces of a plurality of magnetic particles by dispersing the magnetic particles in a solution containing the organic material. The magnetic particles, having the organic material as a coating, are separated from the solution, and the magnetic particles are heated to a temperature at which the organic material decomposes.

REFERENCES:
patent: 3498748 (1970-03-01), Greiner
patent: 3634254 (1972-01-01), Micheli
patent: 3989648 (1976-11-01), Lenhard et al.
patent: 4192902 (1980-03-01), Lu
patent: 4323596 (1982-04-01), Buxbaum et al.
patent: 4332863 (1982-06-01), Hosaka
patent: 4361621 (1982-11-01), Isobe et al.
patent: 4391893 (1983-07-01), Hendricks
patent: 4404260 (1983-09-01), Shibata
patent: 4434009 (1984-02-01), Banba

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