| 摘要 |
PURPOSE:To obtain a magnetic recording medium with excellent durability by incorporating a specific ester compd. into the magnetic layer formed on a nonmagnetic supporting body. CONSTITUTION:The ester compd. expressed by formula I (wherein R1 to R4 are independent, straight or branched chains of alkyl groups or alkenyl groups and the sum of carbons is 12-32) is added as a lubricant to the magnetic layer formed on a polyester film. The magnetic layer contains magnetic powder and a binder as well as this ester compd. By using the specific ester compd. as the lubricant for the magnetic layer, the magnetic recording medium with excellent durability can be obtained. |
