Magnetic recording medium containing a polyurethane resin having

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

1990-05-17

1992-11-24

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

4284246, 428522, 428694, G11B 500

Patent

active

051659999

ABSTRACT:
A magnetic recording medium which comprises a nonmagnetic support having provided thereon a magnetic layer comprising ferromagnetic metal powder dispersed in a binder, wherein the binder contains
a polyurethane resin having a ##STR1## group introduced therein, wherein R represents a hydrogen atom or a straight or branched alkyl group having 1 to 4 carbon atoms and M represents a hydrogen atom, an alkali metal or NH.sub.4.sup..sym..
The magnetic recording medium has excellent electromagnetic converting characteristics and running durability.

REFERENCES:
patent: 4136079 (1979-01-01), Katayama et al.
patent: 4404253 (1983-09-01), Kohler et al.
patent: 4521486 (1985-06-01), Ninomiya et al.
patent: 4559397 (1985-12-01), Noll et al.
patent: 4571364 (1986-02-01), Kasuga et al.
patent: 4637959 (1987-01-01), Ninomiya et al.
patent: 4764553 (1988-08-01), Mosbach et al.

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