MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To drastically improve durability by increasing lubricity by using phosphoric ester specified in formulae as a lubricant. CONSTITUTION:A phosphoric polyester shown in formula I or II is used as a lubricant for a magnetic recording medium whose lubricity is improved and durability is drastically improved is obtained. In formulae, (m) or (n) is 0 or integer of >=1, and m+n=15.