Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1975-05-21

1978-08-15

Pianalto, Bernard D.

Stock material or miscellaneous articles

Composite

Of polycarbonate

428413, 428425, 428539, 428900, H01F 1002

Patent

active

041073851

ABSTRACT:
A magnetic recording medium comprising a base, for example, of a non-magnetic plastic resin, and a magnetic layer coated on the base and composed of a binder with a magnetic powder dispersed therein, is provided with a friction-reducing additive in the magnetic layer constituted by a boron compound obtained by the esterification of boric acid with a polyhydric alcohol having vicinal hydroxyl groups, such as, glycerin. The amount of such boron compound is from 1 to 15, and preferably, from 4 to 10 parts by weight for each 100 parts by weight of the binder. The preferred boron compounds are those including mono- or di-esters of a fatty acid with or without ethylene oxide.

REFERENCES:
patent: 3398011 (1968-08-01), Neirotti et al.
patent: 3852314 (1974-12-01), Hamanaka

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