Magnetic recording medium
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United States of America Patent
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-
Dec 23, 1980
Grant Date -
N/A
app pub date -
Apr 5, 1979
filing date -
Apr 19, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic recording medium which has a protective layer on a magnetic recording layer coated on a substrate and said protective layer comprises polyurethane and nitrocellulose in which isopropyl alcohol originally present has been replaced by a resin selected from the group consisting of polyurethane resins, polybutadiene resins, butadiene-acrylonitrile copolymers, vinyl chloride-vinyl acetate-vinyl alcohol copolymers, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinylidene chloride copolymers, vinylidene chloride-acrylonitrile-copolymers, vinyl acetate resins, epoxy resins, phenoxy resins, polyvinylbutyral resins, polyvinyl formal resins and polyester resins.
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