Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1981-09-17

1983-12-13

Robinson, Ellis P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 360134, 360135, 360136, 427128, 428323, 428328, 428694, 428900, 428480, G11B 570

Patent

active

044205317

ABSTRACT:
A magnetic recording medium is composed of a base and a magnetic coating which comprises a binder and a magnetic powder dispersed therein. The magnetic powder, in turn, contains a nonmagnetic powder having an average particle size of not more than 2 .mu.m and a hardness of at least 6 on Mohs scale, in an amount of 1-20% on the basis of the weight of the magnetic powder, and the binder contains a resin such as polyester resin having a group expressed by the formula --SO.sub.3 M where M is monovalent metal such as Na.

REFERENCES:
patent: 4238341 (1980-12-01), Kato
patent: 4285825 (1981-08-01), Isobe et al.

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