| 摘要 |
PURPOSE:To obtain a magnetic recording medium having excellent durability by incorporating an ester compd. expressed by the specific formula into a magnetic layer. CONSTITUTION:The ester compd. expressed by the formula [where, R1 and R2 are a satd. alkyl group having the straight chain or branch of 1-15C (where the sum of the carbon atoms of R1 and R2 is 16), R2 is a satd. alkyl group having the straight chain or branch of 7-15C or satd. alkyl group having the straight chain or branch of 19-27C] is obtd. by the esterification reaction of branched alcohol designated as, for example, Guerbet alcohol and aliphatic acid R3-COOH. The carbon atoms of the part derived from the alcohol of such ester compd. are 18, and the carbon atoms of the part derived from the fatty acid are 8-16 or 20-28. The durability of the magnetic recording medium is improved if such specific ester compd. is incorporated into the magnetic layer of said medium.
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