| abstract |
PROBLEM TO BE SOLVED: To provide a hard disk lubricant having good CSS durability. A -CF 2 O -, - CF 2 CF 2 O-, perfluorooxyalkylene units selected from is more sequences randomly distributed, further comprising a functional end group A, the following equation (5) A lubricant containing a phosphazene compound represented by the formula: A- [OCH 2 CF 2 O (CF 2 CF 2 O) p (CF 2 O) qCF 2 CH 2 OH ] (5) [In the formula, A is a group represented by the following formula (a). Here, p and q are real numbers of 1 to 30. ] Embedded image |