MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To prevent effectively seizure of a magnetic layer to a magnetic head while maintaining satisfactorily the physical characteristic of the magnetic layer by compounding specific cyclic sulfide with the magnetic layer consisting of ferromagnetic metallic powder dispersed in a binder. CONSTITUTION:A magnetic coating soln. contg. the cyclic sulfide expressed by the formula in a 0.5-10pts.wt. range in 100pts.wt. ferromagnetic metallic powder is prepd. A lubricant may be added together with the cyclic sulfide to the extent at which the total amt. of the lubricant and the cyclic sulfide does not exceed 10pts.wt. with respect to 100pts.wt. magnetic metallic powder. An additive such as a dispersion assistant for magnetic powder, polishing agent or the like may be added thereto according to need. Then the surface of the ferromagnetic powder is protected by the sulfide consisting of the cyclic sulfide by which seizure of the magnetic layer to a magnetic head is prevented. The magnetic recording medium having a long life is thus obtd.