| 摘要 |
PURPOSE:To lower the coefft. of kinematic friction of a magnetic recording medium by incorporating a specified compound into the back coat layer. CONSTITUTION:A back coat layer contg. a compound represented by the formula is formed on one side of a support having a magnetic layer on the other side. In the formula, R1 is 7-21C (un)satd. univalent hydrocarbon, R2 is 1-4C satd. univalent hydrocarbon, j=1-12, 0<=k<2, m<2.5, l<=1, n<=2, k+l+m+n=2-3, and the number of Si atoms in one molecule is 2-300. By the structure, a magnetic recording medium having a low coefft. of kinematic friction and satisfactory traveling performance is obtd.
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