Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1985-05-03
1987-09-15
Thibodeau, Paul J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
427128, 428694, 428695, 428900, G11B 568, G11B 5706, G11B 571
Patent
active
046939300
ABSTRACT:
Flexible magnetic recording media such as videotapes based on ferromagnetic oxide particles can provide high carrier-to-noise ratios previously available only with metal powder tapes when the recording layer has a high loading (at least 74% by weight) of oxide particles which have a high surface area (at least 40 m.sup.2 /g) and includes free monobasic fatty acid comprising more than 1.5% by weight of the ferromagnetic oxide particles. The free fatty acid provides a coefficient of friction not exceeding 0.3. A preferred monobasic fatty acid is myristic acid. By incorporating into the binder a lubricant-adsorption inhibitor such as citric acid, a greater proportion of the fatty acid remains free.
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Kuo Richard J.
Mackay John W.
Van Buren Rick L.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Smith James A.
Thibodeau Paul J.
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