Patent · US Expired

Process for the preparation of magnetic particle dispersions using ball mills and grinding media

US5085889A · kind A · utility

3Cited by

2References

4Claims

0Family size

Assignee

BASF SE

Inventors

Horst Platz · Kehl, DE
Peter Engelhardt · Hessisch Oldendorf, DE
Friedrich Sommermann · Kehl, DE
Albert Kohl · Laumersheim, DE
Juergen Klausmann · Offenburg, DE
Reinhold Baur · Ortenberg, DE
Peter Heilmann · Bad Dürkheim, DE
Hermann Roller · Ludwigshafen, DE

Key dates

Filing date	Mar 16, 1990
Grant date	Feb 4, 1992
Priority date	—
Expiry date	Mar 16, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Magnetic recording media are produced by dispersion of powdered magnetic material in a mixture of solvents, organic polymer binders, dispersants and further conventional additives in a stirred ball mill and subsequent aftertreatment in a ball mill containing grinding media, application of the resulting dispersion as a layer to a substrate and subsequent consolidation of the layer.

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