Magnetic recording medium and magnetic paint therefor

Details Magnetic recording medium and magnetic paint therefor Magnetic recording medium and magnetic paint therefor

1998-10-30

2000-07-25

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428328, 428329, 4284259, 428694BN, 428694BU, 428694BG, 428900, 252 6254, G11B 5708

Patent

active

060934867

ABSTRACT:
Magnetic paint for producing a magnetic recording medium, the magnetic paint comprises at least ferromagnetic powder, binder, .alpha.-Fe.sub.2 O.sub.3 powder, and alumina powder. A relationship between an additive amount (A) of the .alpha.-Fe.sub.2 O.sub.3 powder and an additive amount (B) of the alumina powder is 5.ltoreq.(A+B).ltoreq.25 weight-parts referred to 100 weight-parts of the ferromagnetic powder and 1.ltoreq.A/B.ltoreq.9. The binder comprises polyurethane resin containing metal base sulfonic acid and tertiary amine as major ingredients.

REFERENCES:
patent: 4571362 (1986-02-01), Sato et al.
patent: 5536567 (1996-07-01), Kato et al.
patent: 5935703 (1999-08-01), Deno et al.

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