Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1980-02-08

1982-03-16

Pianalto, Bernard D.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428331, 428337, 428339, 428402, 428412, 428428, 428433, 428450, 428452, 428458, 428464, 428694, 428695, 428900, B32B 302

Patent

active

043201598

ABSTRACT:
The present invention relates to a magnetic recording medium having on a non-magnetic support a magnetic layer comprising a ferromagnetic fine powder in a binder, in which a colloidal silica having a diameter of 7 to 50 m.mu. and methyl groups on the surface thereof is added in a proportion of 2 to 20 parts by weight to 100 parts by weight of the ferromagnetic fine powder during dispersion of the coating composition of the ferromagnetic fine powder.

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