| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant for hard disk having good CSS durability. SOLUTION: A lubricant contains a phosphazene compound represented by formula (1): A-OCH2 CF2 O(CF2 CF2 O)p (CF2 O)q CF2 CH2 O-A and formula (5): A-OCH2 CF2 O(CF2 CF2 O)p (CF2 O)q CF2 CH2 OH comprising a sequence wherein a perfluorooxyalkylene unit selected from -CF2 O- and -CF2 CF2 O- is randomly distributed and further having a functional end group A: [wherein A is a group represented by formula (a), herein R is a hydrogen atom, a 1-4C alkyl, a 1-4C alkoxy, a 1-4C haloalkyl, an aryl, a substituted aryl, an aryloxy, a substituted aryloxy, and p and q are each real number of 1-30]. |
