Magnetic recording medium
AssigneeNippon Zeon Co., Ltd.
InventorsKatsuya Nakamura, Eitaro Nakamura, Makoto Yamamoto
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Abstract
A magnetic recording medium is disclosed, which comprises a base and a magnetic layer formed on at least one surface of the base and the magnetic layer comprises a magnetic powder and a binder which comprises a vinyl chloride resin having both epoxy and quaternary ammonium salt groups.
Claims13
A magnetic recording medium comprising a base and a magnetic layer formed on at least one surface of said base, said magnetic layer comprising a magnetic powder and a binder, said binder being an adduct of a tertiary amine compound with a vinyl chloride copolymer containing an epoxy group, said adduct having an average degree of polymerization of 100 to 900, an epoxy group content of at least 0.5 wt. %, a quaternary ammonium group content of 0.05 to 0.5 wt. % in terms of the amount of nitrogen atoms in the ammonium group, and a vinyl chloride content of at least 60 wt. %.
A magnetic recording medium comprising a base and a magnetic layer formed on at least one surface of said base, said magnetic layer comprising a magnetic powder and a binder, said binder being a radical copolymer of vinyl chloride, a radical-polymerizable monomer having an epoxy group copolymerizable with the vinyl chloride and a radical-polymerizable monomer having a quaternary ammonium group polymerizable with the vinyl chloride, said radical copolymer having an average degree of polymerization of 100 to 900, an epoxy group content of at least 0.5 wt. %, an ammonium group content of 0.05 to 0.5 wt. % in terms of the amount of nitrogen atoms in the ammonium group, and a vinyl chloride content of at least 60 wt. %.
Dependencies are inferred from the claim text.