Method of preparing a magnetic recording medium

Details Method of preparing a magnetic recording medium Method of preparing a magnetic recording medium

1991-04-16

1991-12-03

Pianalto, Bernard

Coating processes

Magnetic base or coating

Magnetic coating

428900, H01F 1002

Patent

active

050699318

ABSTRACT:
A magnetic recording medium consisting of a flexible layer support and a magnetic layer consisting predominantly of magnetic particles finely divided in a binder and nonmagnetic additives applied to the layer support is obtained with improved orientation of the magnetic pigments by adding a dispersion stabilizing component to the magnetic dispersion at a uniform rate over the whole period of dispersion. Highly purified lecithin or a mixed ester of a polyethoxy phosphate ester or ethylene diaminodistearate, a polyurethane resin containing sulphonate groups or a vinyl chloride/vinyl alcohol copolymer is preferred as stabilizing additive.

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