Magnetic recording media

US4895764A · kind A · utility

Assignee

• BASF SE

Inventors

• August Lehner
• Albert Kohl · Laumersheim, DE
• Michael Bobrich · Haßloch, DE
• Hermann Roller · Ludwigshafen, DE
• Peter Richter · Karlstein, DE
• Werner Lenz · Bad Dürkheim, DE
• Ludwig Kreitner · Heppenheim, DE
• Peter Rudolf · Ludwigshafen, DE

Key dates

• Filing date: Feb 26, 1988
• Grant date: Jan 23, 1990
• Expiry date: Feb 26, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31609
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In magnetic recording media consisting of a nonmagnetic base and, firmly applied to this, one or more magnetic layers based on a magnetic material finely dispersed in organic binders, the binder consists of not less than 50% by weight of a high molecular weight branched polyurethane elastomer possessing OH-containing urea groups at the chain ends.