Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2005-05-17

2005-05-17

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Composite

Of polyamidoester

C428S690000, C428S690000, C428S690000, C428S690000

Reexamination Certificate

active

06893723

ABSTRACT:
A high density magnetic recording medium having improved dispersibility in a non-magnetic layer, excellent surface properties, electromagnetic conversion properties and durability is provided. The magnetic recording medium comprises a non-magnetic substrate, a non-magnetic layer disposed on the non-magnetic substrate, and a magnetic layer disposed on the non-magnetic substrate via the non-magnetic layer containing at least carbon black and a radiation curing type binder, wherein the radiation curing type binder contains a radiation curing type polyurethane resin having both a basic polar group and a sulfur-containing polar group in a molecule. The basic polar group is preferably an amino group, and the sulfur-containing polar group is preferably a sulfonic metal basic group.

REFERENCES:
patent: 5922824 (1999-07-01), Amirsakis
patent: 58-146024 (1983-08-01), None
patent: 59 172121 (1984-09-01), None
patent: 63-253526 (1988-10-01), None
patent: 2001-84569 (2001-03-01), None
patent: 2001-84570 (2001-03-01), None

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