Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1985-07-12

1986-10-07

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 360134, 360135, 360136, 427128, 428522, 428694, 428900, 428328, 428329, G11B 570

Patent

active

046159495

ABSTRACT:
A magnetic recording medium comprises a magnetic coating material, or a dispersion of magnetic particles in a resinous binder, and a base to which the coating material is solidly applied, the resinous binder comprising as its ingredients a copolymer composed of vinyl chloride, vinylidene 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 at least 0.2, a polyurethane resin having in its molecule a --SO.sub.3 M group wherein M represents an alkali metal atom, and a polyisocyanate.

REFERENCES:
patent: 3929659 (1975-12-01), Graham
patent: 4277388 (1981-07-01), Kagami
patent: 4429017 (1984-01-01), Ogawa
patent: 4460653 (1984-07-01), Azegami
patent: 4521486 (1985-06-01), Ninomiya
patent: 4529661 (1985-07-01), Ninomiya
patent: 4571364 (1986-02-01), Kasuga

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