Magnetic recording medium

摘要

Proposed is a novel vinyl chloride-based copolymeric resin suitable as an electron beam-curable binder resin for forming a magnetic recording layer of a magnetic recording medium. The binder resin is a vinyl chloride-based copolymeric resin containing monomeric units having a hydroxy group which is reacted with an ethylenically unsaturated monomeric compound having an isocyanato group in a molecule and then subjected to a modification reaction with an amine compound. The magnetic recording medium, e.g., magnetic recording tape, prepared by using the binder resin is excellent in the surface properties such as gloss and traveling resistance as well as in the magnetic properties such as residual magnetic flux density and squareness ratio of the magnetic hysteresis loop.