Patent · US Expired

Production of magnetic recording media

US4472455A · kind A · utility

8Cited by

4References

8Claims

0Family size

Assignee

BASF SE

Inventors

Albert Kohl · Laumersheim, DE
Werner Balz · Schifferstadt, DE
Milena Melzer · Ludwigshafen, DE
Norbert Schneider · Schorndorf, DE
Eberhard Koester · Bischofswerda, DE
August Lehner

Key dates

Filing date	Dec 23, 1983
Grant date	Sep 18, 1984
Priority date	—
Expiry date	Dec 23, 2003

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/7028
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Magnetic recording media are produced by dispersing finely divided anisotropic magnetic material and conventional additives in a solution of a polymeric binder in an organic solvent, or in an aqueous dispersion of a polymeric binder, adding a polymer based on hydrophilic ethylenically unsaturated compounds to the magnetic dispersion, applying a layer of the dispersion to a non-magnetizable base, orienting the anisotropic magnetic material in a magentic field and drying the applied layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.