| 摘要 |
A magnetic recording medium, comprising at least one magnetic layer, said magnetic layer containing ferromagnetic powder and a binder and placed on a nonmagnetic support member, whereby said binder contains a polyurethane resin, using a diol compound having a cyclic structure and a long-chain alkyl chain, and a polyol with weight average molecular weight (Mw) of 400-5000 and having at least one type of polar group selected from the following groups:-SO3M, -SO4M, -PO3M2, -PO4M2, -NHSO3M, >NSO3M, and -COOMwhere M represents hydrogen, at least one type of alkali metal of potassium, sodium and lithium, and an organic amine containing at least one type of alkylamine and alkanol.
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