Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-07-01

1987-04-21

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 477128, 428521, 428522, 428523, 428694, 428900, G11B 5702

Patent

active

046596267

ABSTRACT:
In a magnetic recording medium consisting of a base coated with a magnetic coating material, or a dispersion of magnetic particles in a resinous binder, the binder comprises a copolymer composed of vinyl chloride, a vinyl alkylcarboxylate, another monomer copolymerizable with vinyl chloride, and a saponified vinyl alkylcarboxylate and having an OH/CH absorption ratio according to the infrared absorption spectrum of 0.2 to 0.7, a polyurethane resin having in its molecule a --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyurethane resin or polyester resin or both containing no --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyisocyanate.

REFERENCES:
patent: 4152485 (1979-05-01), Mizumura
patent: 4400435 (1983-08-01), Yoda
patent: 4460653 (1984-07-01), Azegami
patent: 4529661 (1985-07-01), Ninomiya

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