| abstract |
Cyclophosphazene compound represented by formula (I), lubricant using the same, and magnetic disk Wherein n is 2, 3 or 4, m is an integer from 1 to 12, R is fluoroalkyl group C 1 to 4. Rf is, -CF 2 O (CF 2 CF 2 O) x (CF 2 O) y CF 2 - or -CF 2 CF 2 O (CF 2 CF 2 CF 2 O) z CF 2 CF 2 - is. x, y, z are each a number average molecular weight of the fluoropolyether represented by HOCH 2 -Rf-CH 2 OH comprising the Rf is 0 or a positive real number as a 500 to 4,000, the molecular weight of the fluoropolyether The distribution (PD) is 1.0 to 1.5. |