Magnetic recording medium having a magnetic layer comprising fer

Details Magnetic recording medium having a magnetic layer comprising fer Magnetic recording medium having a magnetic layer comprising fer

1994-05-17

1995-10-17

Resan, Stevan A.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428522, 428694B, 428694BU, 428694BM, 428900, G11B 500

Patent

active

054589797

ABSTRACT:
A magnetic recording medium comprising a nonmagnetic support having on at least one side thereof a magnetic layer comprising a ferromagnetic particle and a binder, wherein the binder comprises a polyvinyl acetal resin having a polar group and a polyurethane resin having a polar group; and a magnetic recording medium comprising (a) a nonmagnetic support having on at least one side thereof at least one of a lower magnetic layer comprising a ferromagnetic particle and a binder and a nonmagnetic layer comprising a nonmagnetic particle and a binder and (b) an upper magnetic layer comprising a ferromagnetic particle and a binder provided thereon, wherein at least the binder contained in the upper magnetic layer comprises a polyvinyl acetal resin having a polar group and a polyurethane resin having a polar group.

REFERENCES:
patent: 3650828 (1972-03-01), Higashi et al.
patent: 4092256 (1978-05-01), Goodson et al.
patent: 5091249 (1992-02-01), Nishikawa et al.

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