Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1993-10-12

1995-06-06

Resan, Stevan A.

Stock material or miscellaneous articles

Composite

Of inorganic material

4284259, 428522, 428694B, 428694BA, 428900, G11B 500

Patent

active

054221935

ABSTRACT:
The present invention provides a magnetic recording medium excellent in S/N ratio and durability. The magnetic recording medium is characterized in that a magnetic powder having a relative surface area of at least 35 m.sup.2 /g and an average adsorption of myristic acid of up to 0.5 mg/m.sup.2 in methylethylketone solution of an average concentration of 0.6 g/100 ml, on the one hand, and a magnetic layer comprising a bond having at least one hydrophilic group selected from among SO.sub.3 M, SO.sub.4 M, PO.sub.4 M.sub.2 and N.sup.+ R.sup.1 R.sup.2 R.sup.3 X.sup.- and at least one reactive group selected from among hydroxide group, thiol group, amino group and epoxy group, on the other hand, is bridged by at least one briding agent selected from among polyisocyanate, polyamine and polythiol.

REFERENCES:
patent: 4501795 (1985-02-01), Takeuchi et al.
patent: 4529649 (1985-07-01), Takeuchi et al.
patent: 4529661 (1985-07-01), Ninomiya et al.
patent: 4585697 (1986-04-01), Kato et al.
patent: 4613545 (1986-09-01), Chubachi et al.
patent: 4885208 (1989-12-01), Araki et al.
patent: 4937098 (1990-06-01), Nishikawa et al.
patent: 4937151 (1990-06-01), Yasuhara et al.

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