Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2005-07-05

2005-07-05

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

C428S328000, C428S425900, C428S690000, C428S690000

Reexamination Certificate

active

06913818

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support and a magnetic layer containing a binder and a ferromagnetic metal powder dispersed in the binder, wherein the binder contains a polyurethane resin obtained from a polyester polyol, a chain extender, and an organic diisocyanate, and the magnetic layer has a product Π of coercive force Hc (kA/m) in an in-plane, longitudinal direction and magnetic flux Øm (Tμm) in a range of from 400 to 800.

REFERENCES:
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patent: 5906880 (1999-05-01), Chiba et al.
patent: 6753084 (2004-06-01), Maekawa et al.
patent: 2001/0044037 (2001-11-01), Naoe et al.
patent: 2001-325716 (2001-11-01), None
patent: 2002-157726 (2002-05-01), None

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