Magnetic recording medium containing a polyurethane binder resin

Details Magnetic recording medium containing a polyurethane binder resin Magnetic recording medium containing a polyurethane binder resin

1989-08-22

1991-11-12

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

4284246, 4284258, 4284259, 428694, 428900, G11B 2300

Patent

active

050647202

ABSTRACT:
A magnetic recording medium containing a specific binder resin is disclosed. The magnetic recording medium comprising a magnetic layer which contains a magnetic powder and a binder, in which the binder comprises a polyurethane resin having an anionic functional group being in a form of intramolecular salt; and the magnetic powder is selected from the group consisting of a ferro-magnetic cobalt-containing iron oxide powder, a ferro-magnetic chromium dioxide powder anad a magnetic metal powder containing iron atoms and aluminum atoms in a portion of from 100:1 to 100:20 in terms of the number of atoms.

REFERENCES:
patent: 4182828 (1980-01-01), Reischal et al.
patent: 4404253 (1983-09-01), Kohler et al.
patent: 4784914 (1988-11-01), Matsufuji et al.
patent: 4956220 (1990-09-01), Sueyoshi et al.

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