Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1980-03-03

1982-03-30

Silverman, Stanley S.

Stock material or miscellaneous articles

Composite

252 6254, 427128, 360134, 428694, 428695, 428900, G11B 570

Patent

active

043224741

ABSTRACT:
A magnetic recording medium, prevented from blooming of the lubricants therein even after used at a high temperature under a high humidity for a long period of time and excellent in abrasion resistance and durability, comprising an elastic base sheet and a magnetic layer containing magnetic powders and a binder, characterized in that the magnetic layer further contains (A) at least one of esters of saturated aliphatic acids having 18 carbon atoms with aliphatic alcohols having 3 to 6 carbon atoms, (B) at least one of saturated aliphatic acids having 14 to 18 carbon atoms and (C) at least one of zinc salts of saturated aliphatic acids having 14 to 18 carbon atoms, the content of the component (A) being from 0.5 to 2.0% by weight based on the weight of the magnetic powders in the magnetic layer, the content of the component (B) being from 1/4 to 1 part by weight to one part by weight of the component (A) and the content of the component (C) being from 1/3 to 1 part by weight to one part by weight of the combined amount of the components (A) and (B).

REFERENCES:
patent: 3634253 (1972-01-01), Akashi et al.
patent: 3833412 (1974-09-01), Akashi et al.
patent: 4018968 (1977-04-01), Neumann et al.
patent: 4075384 (1978-02-01), Suzuki et al.
patent: 4091143 (1978-05-01), Hartmann et al.
patent: 4153754 (1979-05-01), Huisman
patent: 4172176 (1979-10-01), Tanuka et al.
patent: 4186228 (1980-01-01), Ogawa et al.
patent: 4247407 (1981-01-01), Naruse et al.

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