Resin used for magnetic recording media and a method for the pro

Details Resin used for magnetic recording media and a method for the pro Resin used for magnetic recording media and a method for the pro

1989-06-26

1991-02-26

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymerizing in reactor of specified material, or in reactor...

526212, C08F 206

Patent

active

049962728

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: 4190717 (1980-02-01), Suzuki
patent: 4272622 (1981-06-01), Kitamura

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