| 摘要 |
PURPOSE:To diminish surface roughness without spoiling durability by using a polyurethane resin and vinyl chloride resin contg. the metallic salt of a sulfonic acid as a binder. CONSTITUTION:The resins contg. the metallic salt of the sulfonic acid are used for both resins used for a magnetic recording medium contg. the polyure thane resin and vinyl chloride resin as a binder and the vinyl chloride resin in which an epoxy group is incorporated at 0.1-3wt% is used. The magnetic powder to be used is exemplified by iron oxide, Co-contg. orion oxide or metal lic iron, Fe-Co, Fe-Ni, Co-Ni, Fe-Co-Ni, Fe-Co-B, Fe-Co-Cr-B, etc. Nitrocellulose, nitrocellulose derive., polyester resin, buyral resin, phenoxy resin, etc. are also added if necessary as the binder.
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