| abstract |
PROBLEM TO BE SOLVED: To provide a vinyl chloride copolymer excellent in dispersibility in a ferromagnetic fine powder and compatibility with a polyurethane resin and a magnetic recording medium excellent in characteristics using the same. . SOLUTION: (1) vinyl chloride unit, (2) fatty acid vinyl ester unit, (meth) acrylate unit, Maleic acid diester unit, fumaric acid diester unit, A monomer unit selected from alkyl vinyl ether units, (3) a vinyl chloride copolymer comprising a phosphate group-containing monomer unit, a binder for a magnetic recording medium containing the vinyl chloride copolymer as a main component, A magnetic recording medium comprising a magnetic layer in which ferromagnetic fine powder is dispersed in the magnetic recording medium binder. |