Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2006-05-16

2006-05-16

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Binder media

Reexamination Certificate

active

07045227

ABSTRACT:
A magnetic recording medium comprising: a nonmagnetic support; an undercoat layer containing a compound polymerizable by radiation exposure; and a magnetic layer containing ferromagnetic powder and a binder, in this order wherein the undercoat layer has a thickness of from 0.1 to 1 μm, the binder contains a polyurethane resin having a glass transition temperature of from 100 to 200° C., the magnetic layer has a thickness of from 20 to 150 nm, and an average particle size of the ferromagnetic powder is from 20 to 60 nm.

REFERENCES:
patent: 4664965 (1987-05-01), Okita et al.
patent: 4789583 (1988-12-01), Akutsu
patent: 6428884 (2002-08-01), Naoe et al.
patent: 2003/0152806 (2003-08-01), Murayama et al.
patent: 5-57647 (1993-08-01), None

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