Magnetic recording medium comprising a magnetic layer containing

Details Magnetic recording medium comprising a magnetic layer containing Magnetic recording medium comprising a magnetic layer containing

1994-06-30

1996-05-07

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428402, 428403, 428694BA, 428694BG, 428900, G11B 500

Patent

active

055144659

ABSTRACT:
A magnetic layer containing a magnetic powder whose surface is composed mainly of carbon and/or iron carbide and a binder is provided on a non-magnetic substrate, the magnetic layer further contains an organic dye compound having at least one polar group selected from the group consisting of a hydroxyl group, a carboxylic acid group, a sulfonic acid group and a salt thereof, and the binder contains an amino group and/or an ammonium salt group. Due to the improved dispersibility of a magnetic paint, the magnetic recording medium of the invention is improved in surface morphology, magnetic properties, and electromagnetic properties.

REFERENCES:
patent: 4632866 (1986-12-01), Kubota et al.
patent: 4663084 (1987-05-01), Shirai et al.
patent: 4794042 (1988-12-01), Kubota et al.
patent: 4937098 (1990-06-01), Nishikawa et al.
patent: 5019416 (1991-05-01), Honzawa
Database WPI, Derwent Publications, AN 87-047498, JP-A-62 006 435, Jan. 13, 1987.
Database WPI, Derwent Publications, AN 92-137252, JP-A-04 079 018, Mar. 12, 1992.

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