Magnetic recording media with resin containing vinyl chloride co

Details Magnetic recording media with resin containing vinyl chloride co Magnetic recording media with resin containing vinyl chloride co

1991-02-13

1992-08-18

Henderson, Christopher

Stock material or miscellaneous articles

Composite

Of inorganic material

G11B 570

Patent

active

051398923

ABSTRACT:
A resin used for magnetic recording media, comprising a vinyl chloride copolymer containing vinyl monomers with hydroxyl groups and vinyl monomers with quaternary ammonium salt groups as component units. The resin is made by a method which comprises polymerizing an organic solvent solution containing vinyl chloride, vinyl monomers with hydroxyl groups and vinyl monomers with quaternary ammonium salt groups in a reacting apparatus to thereby precipitate a vinyl chloride copolymer, the interior surface of said reacting apparatus, which comes into contact with said organic solvent solution being coated with a fluororesin.

REFERENCES:
patent: 4687824 (1987-08-01), Vaughn
patent: 4737357 (1988-04-01), Lehmann et al.
patent: 4985314 (1991-01-01), Merriam

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