Patent · US Expired

Magnetic recording media

US5968658A · kind A · utility

1Cited by

13References

2Claims

0Family size

Assignee

Emtec Magnetics GmbH · DE

Inventors

Ria Kress · Ludwigshafen, DE
Albert Kohl · Laumersheim, DE
August Lehner
Werner Lenz · Bad Dürkheim, DE
Michael Hitzfeld · Karlsruhe, DE

Key dates

Filing date	Dec 2, 1997
Grant date	Oct 19, 1999
Priority date	—
Expiry date	Dec 2, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31609
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Magnetic recording media contain a nonmagnetic substrate and a magnetizable layer, the magnetizable layer containing ferromagnetic pigments and a system of polymeric materials, wherein the system of polymeric materials contains PA1 a) from 3 to 35% by weight of a polymer containing ionic or ionogenic groups PA1 b) from 5 to 97% by weight of a polymer XIV which contains basic groups, and has a molecular weight of from 30000 to 2000000.

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