Quaternary-containing resin used for magnetic recording media

Details Quaternary-containing resin used for magnetic recording media Quaternary-containing resin used for magnetic recording media

1988-08-22

1989-08-29

Henderson, Christopher

Stock material or miscellaneous articles

Composite

Of inorganic material

428483, 428900, 524555, 525374, G11B 568

Patent

active

048616834

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: 4163092 (1979-07-01), Steckler

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