| 摘要 |
PURPOSE:To improve the dispersibility of magnetic powder and to obtain a magnetic recording medium having an excellent electromagnetic conversion characteristic and wear resistance by using a resin having the specific polar group in the molecular as a binder component and making combination use thereof with a curing agent. CONSTITUTION:Generally used binder resins such as a PVC resin, vinyl acetal resin, cellulosic resin, polyurethane resin, polyester resin and acrylic resin into which >=2 kinds of the polar groups are incorporated are adequately used for the binder resin having >=2 kinds of the polar groups selected from -PO(OM)2, -OPO(OM)2, -OP(OM)2, -SO3M, -OSO3M, -COOM, -NH2, -OH (where M is H, Li, Na, k, NH2 or NH4) into the molecules to be used as the binder component. An isocynate compd. and ethylene imine compd., etc. having >=2 crosslinkable functional groups such as isocynate group, epoxy group and ethylene imine group in one molecule are preferably used for the curing agent to be used in combination with the above-mentioned binder resin.
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