Patent · US Expired

Production of magnetic recording media possessing a backing coating, and magnetic recording media thus produced

US4645723A · kind A · utility

1Cited by

5References

4Claims

0Family size

Assignee

BASF SE

Inventors

Milena Melzer · Ludwigshafen, DE
Hermann Roller · Ludwigshafen, DE
Norbert Schneider · Schorndorf, DE
Horst Fitterer · Mannheim, DE
Wulf Munzner · Bischofswerda, DE

Key dates

Filing date	Feb 15, 1985
Grant date	Feb 24, 1987
Priority date	—
Expiry date	Feb 15, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/265
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A process for the production of magnetic recording media by applying a magnetic layer, which consists essentially of magnetic material finely dispersed in organic polymers, to one side of a flexible base, and applying a non-magnetizable backing coating which is free of inorganic solids to that side of the base which is opposite the magnetic layer, wherein the backing coating consists of two or more polymers which are incompatible with one another and have precipitated from a solvent mixture, and magnetic recording media produced by this process.

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