Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1980-05-19

1982-11-02

Silverman, Stanley S.

Stock material or miscellaneous articles

Composite

Of epoxy ether

252 6254, 360134, 4284259, 428694, 428900, G11B 570

Patent

active

043573916

ABSTRACT:
A magnetic recording medium is provided which satisfies electromagnetic conversion characteristics and typical physical properties such as bonding strength, repeated-passage stability, still-playback characteristics, etc. without unfavorably affecting the surface smoothness. The binder in the magnetic coating contains in combination specific proportions of three components, a polyurethane resin, an epoxy resin, and a nitrocellulose whose protective ingredient has been replaced by a vinyl chloride-vinyl acetate copolymer is used as a resin binder in magnetic coating material together with a polyisocyanate curing agent.

REFERENCES:
patent: 3320090 (1967-05-01), Graubart
patent: 3597273 (1971-08-01), Akashi et al.
patent: 3740266 (1973-06-01), Akashi et al.
patent: 3810840 (1974-05-01), Ruler
patent: 3840400 (1974-10-01), Yamada et al.
patent: 3911196 (1975-10-01), Navidad
patent: 4115290 (1978-09-01), Kubota et al.
patent: 4186228 (1980-01-01), Ogawa et al.
patent: 4238548 (1980-12-01), Okuyama et al.
patent: 4323628 (1982-04-01), Okuyama et al.

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