Magnetic recording media

US5424132A · kind A · utility

Assignee

• BASF Magnetics GmbH · DE

Inventors

• Michael Bobrich · Haßloch, DE
• Gregor Brodt · Heppenheim, DE
• Ria Kress · Ludwigshafen, DE
• Milena Melzer · Ludwigshafen, DE
• Norbert Schneider · Schorndorf, DE

Key dates

• Filing date: Oct 7, 1993
• Grant date: Jun 13, 1995
• Expiry date: Oct 7, 2013

Classification

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

Abstract

Magnetic recording media consist of a nonmagnetic substrate and at least one magnetizable layer which is firmly applied thereon is based on a magnetic material dispersed in at least one polyureaurethane and a polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate being obtained by reacting a polyacrylate with a mixture of di- and polyisocyanates and converting the remaining NCO groups into substituted urea groups with aminoalkyltrialkoxysilanes.