Magnetic recording medium having a magnetic layer containing chromium dioxide particles and linolenic acid

US5217810A · kind A · utility

Assignee

• BASF SE

Inventors

• August Lehner
• Rudolf Suettinger · Heidelberg, DE
• Michael Bobrich · Haßloch, DE
• Hermann Dikow · Hockenheim, DE
• Hermann Roller · Ludwigshafen, DE
• Werner Lenz · Bad Dürkheim, DE
• Ludwig Kreitner · Heppenheim, DE
• Werner Loch · Erpolzheim, DE
• Norbert Schneider · Schorndorf, DE

Key dates

• Filing date: Mar 19, 1992
• Grant date: Jun 8, 1993
• Expiry date: Mar 19, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2991
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Magnetic recording media consisting of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon and is based on a magnetic material which essentially consists of ferromagnetic chromium dioxide and is finely dispersed in a polymer binder and further conventional additives are distinguished by a particular stability to the chemical decomposition due to moisture and oxidizable compounds and hence particular stability to the deterioration in the magnetic properties, as a result of the addition of from 0.1 to 8% by weight, based on the amount of chromium dioxide, of a monomeric, polyunsaturated, organic compound to the magnetic layer.