Magnetic recording medium having a back coat layer containing ca

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...

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427128, 427131, 428408, 428328, 428329, 428522, 428694, 428695, 428900, 4284259, G11B 572

Patent

active

047940409

ABSTRACT:
A magnetic recording medium comprising a non-magnetic support, a magnetic recording layer formed on one side of the support, and a back coat layer formed on the other side. The back coat layer is formed of a composition which comprises a dispersion, in a resin binder, of carbon black having a pH of 2.0 to 8.5 and a coloring power not less than 90 as determined by the ASTM method. The dispersion may further comprise a specific type of aliphatic acid-modified, fluorinated organosilicone in order to improve the travellability and durability of the medium.

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Ullmanns Encyklopadie D. Techn. Chemie, 3. edition, vol. 14, pp. 793 to 795, 803 to 810.

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