Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1982-12-20

1984-02-14

Pianalto, Bernard D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

4284259, 428457, 4284735, 4284777, 428481, 428532, 428694, 428695, 428900, H01F 1002

Patent

active

044317000

ABSTRACT:
The present invention relates to a magnetic recording medium excellent in S/N ratio and abrasion resistance, which comprises a non-magnetic support and a magnetic recording layer coated thereon, consisting of a ferromagnetic fine powder and a binder, in which the binder contains (1) nitrocellulose having an average polymerization degree of 50 to 300 and a nitrification degree of 10.7 to 13 and (2) a polyurethane resin having a number average molecular weight of 40,000 to 100,000, obtained from diphenylmethane diisocyanate and a mixture of polyneopentyl adipate having an average molecular weight of 800 to 2000 and polybutylene adipate having an average molecular weight of 800 to 2000 in a mixing proportion by weight of 2/8 to 9/1.

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