A magnetic recording medium.

摘要

A magnetic recording medium comprising a non-magnetic supporting material and a magnetic layer which is made by dispersing ferromagnetic powder in a binding material and coated on the supporting material is characterized in that the binding material comprises a component made by graft polymerization of acrylic macromonomer having two terminal hydroxy functional groups and a molecular weight in the range from 1,000 to 10,000 to polyurethane resin. The problem of compatibility which occurs when acrylic resins and polyurethane resins are mixed together is solved and excellent properties of both of acrylic resins and polyurethane resins are exhibited simultaneously. Affinity between the binding material and magnetic powder is enhanced and the magnetic powder is dispersed into the binding material more homogeneously. Thus, high performance magnetic recording media having excellent smoothness of surface, durability and magnetic characteristics can be easily prepared. Magnetic recording media of the invention can be advantageously utilized to prepare, for example, magnetic tapes, magnetic sheets and magnetic disks.