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AssigneeTDK Corporation
InventorsAkira Somiya, Shigeo Kurose
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The magnetic recording medium of this invention comprises a magnetic layer formed on one of the opposite surfaces of a nonmagnetic support and a backcoat layer using a nonmagnetic powder and a binder as main components thereof and formed on the other surface thereof and uses as the binder in the backcoat layer a vinyl chloride-based copolymer having an amine-modified vinyl unit and an acidic functional group-containing vinyl unit. Owing to this construction, a paint to be used therein realizes perfect dispersibility and perfect stability. As a result, the backcoat layer to be formed therein is enabled to acquire excellent surface properties and the magnetic recording medium to be finally produced is allowed to exhibit an excellent electromagnetic conversion property.
A magnetic recording medium comprising a nonmagnetic support having opposite surfaces and provided on one of said opposite surfaces with a magnetic layer and on the other surface thereof with a backcoat layer having a nonmagnetic powder and a binder as main components thereof, wherein said binder in said backcoat layer contains a vinyl chloride copolymer having an amine-containing vinyl unit and an acidic functional group-containing vinyl unit in the same molecular unit,
Dependencies are inferred from the claim text.