Magnetic recording medium and production method thereof

Details Magnetic recording medium and production method thereof Magnetic recording medium and production method thereof

1998-06-17

2000-06-06

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428522, 428694BN, 428694BS, 428694BG, 428900, G11B 5738, G11B 5702

Patent

active

060716053

ABSTRACT:
The present invention provides a magnetic recording medium including a lower non-magnetic layer mainly consisting of a non-magnetic powder and a binder and an upper magnetic layer mainly consisting of a magnetic powder and a binder which layers are formed on a non-magnetic support body, wherein the binder of the lower non-magnetic layer is a vinyl chloride copolymer having a sulfonic acid base and/or a quaternary ammonium base and hydroxy group and epoxy group, and having an average polymerization degree of 100 to 220, and the non-magnetic powder is a non-magnetic powder having a longer axis length of 0.2 .mu.m or below and an acid surface.

REFERENCES:
patent: 5702757 (1997-12-01), Ohmura
patent: 5922454 (1999-07-01), Inaba et al.

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