Patent · US Expired

Magnetic recording media

US4328282A · kind A · utility

25Cited by

3References

3Claims

0Family size

Assignee

BASF SE

Inventors

August Lehner
Heinrich Hartmann · Schifferstadt, DE
Rudolf Bachmann
Werner Balz · Schifferstadt, DE
Albert Kohl · Laumersheim, DE

Key dates

Filing date	Jan 16, 1981
Grant date	May 4, 1982
Priority date	—
Expiry date	Jan 16, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31786
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Magnetic recording media comprising a non-magnetic base and, applied thereto, one or more magnetizable layers based on an anisotropic magnetic material finely dispersed in an organic binder containing an ionomeric polyurethane elastomer, wherein the binder used is a substantially aqueous polyurethane dispersion prepared from a polyurethane solution which has been obtained by reacting a polyisocyanate with an organic polyhydroxy compound in the presence of an organic solvent that is inert to isocyanate groups.

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