Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1990-02-15

1991-11-12

Cashion,, Jr.

Stock material or miscellaneous articles

Composite

Of inorganic material

428696, 428900, G11B 2300

Patent

active

050647300

ABSTRACT:
Disclosed is a magnetic recording medium having a magnetic layer comprising a vinyl chloride copolymer as a binder and a magnetic powder and formed on a non-magnetic support. The vinyl chloride copolymer contains a hydroxyl group and a quaternary ammonium salt, wherein the hydroxyl group is derived from a monoallyl or monomethallyl ether of a polyhydroxyl compound, or a monoallyl or monomethallyl thioether of a polyhydroxyl compound. The vinyl chloride copolymer may further contain a hydrophilic group derived from at least one monomer which is selected from carboxylic acids, sulfur-containing acids, phosphorus-containing acids and salts thereof.

REFERENCES:
patent: 4600521 (1986-07-01), Nakamura et al.
patent: 4743501 (1988-05-01), Eguchi et al.
patent: 4770941 (1988-09-01), Imai et al.
patent: 4784913 (1988-11-01), Nakamura et al.
patent: 4842942 (1989-06-01), Yatsuka et al.
patent: 4861683 (1989-08-01), Nakachi et al.
patent: 4900631 (1990-02-01), Yamakawa et al.

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