Patent ID: 6444306
Filing Date: 2002-09-03
Classification: G11B,Y10T

Abstract:
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 of polar group selected from the following groups:â€”SO3M, â€”SO4M, â€”PO3M2, â€”PO4M2, â€”NHSO3M, >NSO3M, and â€”COOM where M represents hydrogen, at least one type of alkali metal of potassium, sodium or lithium, and an organic amine containing at least one type of alkylamine or alkanol.