Magnetic recording medium comprising a styrene copolymer or an a

Details Magnetic recording medium comprising a styrene copolymer or an a Magnetic recording medium comprising a styrene copolymer or an a

1992-06-19

1994-06-14

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428418, 4284244, 4284259, 428694BG, 428900, B32B 1508

Patent

active

053209141

ABSTRACT:
A magnetic recording medium comprises a non-magnetic support on which is coated a magnetic layer. The magnetic layer contains a ferromagnetic powder dispersed in a binder. The binder comprises a styrene copolymer or an acrylic copolymer, respectively containing both of (i) an epoxy group and (ii) at least one hydrophillic group, such as a strong salt group or a tertiary ammonium salt group. The magnetic recording medium exhibits excellent recording density and S/N ratio, causes no environmental pollution, because of the absence of generation of hydrochloric acid on incineration of the magnetic recording medium for disposal after use. The magnetic recording medium is favorably utilized for magnetic tapes, magnetic sheets, magnetic discs and like products.

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