Magnetic recording media
AssigneeBasi Magnetics GmbH
InventorsAugust Lehner, Norbert Schneider, Hermann Roller, Werner Balz, Werner Lenz, Albert Kohl
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Abstract
Magnetic recording media are obtained by preparing a dispersion of anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, applying the dispersion as a layer to a nonmagnetizable substrate, then orienting the anisotropic magnetic material in a magnetic field and solidifying the applied magnetic layer, the magnetic layer containing finely divided organic, hydrophobic supporting pigments and a highly viscous polysiloxane.
Claims1
A magnetic recording medium obtained by preparing a dispersion of anisotropic magnetic material in a solution of a polymeric binder in an organic solvent, applying the dispersion as a layer to a nonmagnetizable substrate, then orienting the anisotropic magnetic material in a magnetic field and solidifying the applied magnetic layer, wherein a finely micronized, spherical particles of polyethylene or polypropylene having a particle diameter of less than 30 micrometers which are insoluble in the solvent used and have a melting point of more than 90.degree. C. are present in the magnetic layer in an amount of from 0.1 to 8% by weight in combination with from 0.1 to 1.5% by weight of highly viscous polysiloxane having a viscosity of from 10,000 to 500,000 mPa.s, the percentages in each case being based on the amount of magnetic material.
Dependencies are inferred from the claim text.