Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1986-11-12

1988-03-08

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428323, 428694, 428900, G11B 570

Patent

active

047299223

ABSTRACT:
A magnetic recording medium comprises a non-magnetic support having provided thereon a magnetic layer containing magnetic particles dispersed in a binder. The magnetic layer contains acicular Cr.sub.2 O.sub.3 having an average length in the long axis of 1.0 .mu.m or less, an average length in the short axis of 0.1 .mu.m or less and an acicular ratio (long axis/short axis) of from 5/1 to 20/1 in an amount of from 1 to 20 wt % based on the total weight of the magnetic particles. The binder comprises at least one material selected from the group consisting of polyurethane having a glass transition temperature (Tg) of from 0.degree. to 95.degree. C. or containing a metal sulfonate group, or a vinyl chloride resin containing a metal sulfonate group.

REFERENCES:
patent: 4328935 (1982-05-01), Steel
patent: 4420531 (1983-12-01), Tokuda
patent: 4425400 (1984-01-01), Yamaguchi et al.
patent: 4529661 (1985-07-01), Ninomiya et al.
patent: 4613545 (1986-09-01), Chubachi et al.
patent: 4618536 (1986-10-01), Morioka et al.

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