MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To decrease the coefft. of friction of a magnetic recording medium by incorporating a fluorinated polyether having a specific phosphate at the terminal into a protective layer. CONSTITUTION:The protective layer on a magnetic layer is incorporated therein with >=1 kinds of the polymers which consists of the fluorinated polyether having the molecular skeleton expressed by the formula I (where n is 1-18) as a unit and are bound with -CH2OPO(OH)2 at least one terminal thereof or the phosphate expressed by the formula II (where m is 1-90) at both terminals. The coefft. of friction of the magnetic recording medium is decreased and the runnability, durability and corrosion resistance and improved according to the above-mentioned constitution.