Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1982-03-31

1983-10-11

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of inorganic material

252 6254, 360134, 360135, 360136, 427128, 428694, 428900, 428447, G11B 570, H01F 1002

Patent

active

044093004

ABSTRACT:
A magnetic recording medium is provided which has smooth and stable running performances and is free of "squeal" phenomenon, especially in an environment of high temperature and high humidity. A highly viscous silicone oil having a viscosity of 100,000 centistokes or more is incorporated in combination with a sorbitan fatty acid ester into a magnetic coating layer of the magnetic recording medium. Such silicone oil is represented by the general formula: ##STR1## wherein R is CH.sub.3, R' is CH.sub.3, C.sub.6 H.sub.5 or F and n is a number which determines a viscosity thereof. Such sorbitan fatty acid ester is selected from sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan tristearate, sorbitan monooleate and the like.

REFERENCES:
patent: 4005242 (1977-01-01), Kopke et al.
patent: 4110503 (1978-08-01), Ogawa et al.
patent: 4305995 (1981-12-01), Ota et al.

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