Magnetic recording medium comprising two magnetic layers each la

Details Magnetic recording medium comprising two magnetic layers each la Magnetic recording medium comprising two magnetic layers each la

1993-06-01

1994-05-31

Resan, Stevan A.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428336, 428447, 428694BM, 428694BP, 428900, 428694BN, G11B 500

Patent

active

053168453

ABSTRACT:
A magnetic recording medium comprising a nonmagnetic support and at least two magnetic layers on the support, each magnetic layer containing a ferromagnetic powder and a binder, wherein the lower magnetic layer comprises at least one layer containing a branched fatty acid-modified silicone, but not carbon black, and the upper magnetic layer comprises at least one layer containing a branched fatty acid-modified silicone and carbon black having a DBP absorption oil amount of 100 to 250 ml/100 g. The magnetic recording medium has improved lubricating characteristics.

REFERENCES:
patent: 4135016 (1979-01-01), Ogawa et al.
patent: 4539257 (1985-09-01), Ryoke et al.
patent: 4844946 (1989-07-01), Komatsu et al.
patent: 5051318 (1991-09-01), Nishikawa et al.
patent: 5093193 (1992-03-01), Koyama et al.

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