Coating type magnetic recording medium

Details Coating type magnetic recording medium Coating type magnetic recording medium

1998-04-09

2000-09-05

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428694BP, 428694BU, 428900, G11B 5702

Patent

active

061140260

ABSTRACT:
An object of the present invention is to impart good running stability and durability to a magnetic recording medium comprising a combination of a polyester polyurethane resin and a phenox resin as a binder for a magnetic layer of a coating type magnetic recording medium while ensuring excellent static magnetic properties.
In order to achieve the object, the present invention provides a coating type magnetic recording medium having a magnetic layer formed on a nonmagnetic support and containing a magnetic powder, a binder and a lubricant, wherein a combination of a polyester polyurethane resin and a phenox resin is use as the binder, a combination of a polyhydric alcohol ester and silicone oil is used as the lubricant, and the surface extraction of the lubricant from the coating type magnetic recording medium is 3.0.times.10.sup.-3 to 3.0.times.10.sup.-2 g/m.sup.2.

REFERENCES:
patent: 4391864 (1983-07-01), Hosaka et al.
patent: 4554220 (1985-11-01), Yamamoto et al.
patent: 4696869 (1987-09-01), Funanashi et al.
patent: 5270109 (1993-12-01), Nishikawa et al.

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