Production of magnetic recording media

US4775553A · kind A · utility

Assignee

• BASF SE

Inventors

• Jenoe Kovacs · Heßheim, DE
• Peter Engelhardt · Hessisch Oldendorf, DE
• Hermann Roller · Ludwigshafen, DE
• Lothar Schwarz · Oberkirch, DE
• Peter Nagel · Highlands, US

Key dates

• Filing date: Jul 22, 1986
• Grant date: Oct 4, 1988
• Expiry date: Jul 22, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/90
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Magnetic recording media are produced by dispersing pulverulent magnetic material in a mixture of a solvent, an organic polymer binder, a dispersant and other conventional additives, with the aid of a conventional dispersing apparatus and using a particular ceramic grinding medium, applying the resulting dispersion in the form of a layer on a base and then compacting the layer.