METHOD OF MAKING MAGNETIC RECORDING MEDIUM

摘要

The magnetic recording medium is prepared by coating a magnetic paing composed of mainly ferromagnetic powder, carbon black, grinding agent and binder onto a non-magnetic substrate. The binder is selected from a polyvinyl chloride-based binder or a polyvinyl chloride copolymer (e.g. vinyl chloride-vinyl acetate-vinyl alcohol copolymer etc.)-polyurethane resin mixture. The medium is characterized by adding the epoxy compound of formula (I) in an amount of 1-7 % by weight based on the weight of the binder. The magnetic recording material has a good durability and electromagnetic conversion characteristic, and is used for magnetic tapes and magnetic disks.'