Patent ID: 6740414
Filing Date: 2004-05-25
Classification: C08G,C10M,C10N,G11B

Abstract:
A magnetic recording medium comprising a non-magnetic substrate and, at least, a magnet layer for carrying out magnetic recording and retrieval, a protective layer, and a lubricant layer which are formed in order on the non-magnetic substrate,wherein said lubricant layer includes fluoropolyether which is represented by chemical formula (1) below: R1â€”CF2Oâ€”[â€”(CF2CF2O)mâ€”(CF2O)nâ€”]â€”CF2â€”R2 â€ƒâ€ƒ(1) where m and n are positive integers and R1 and R2 are end functional groups respectively represented by: â€”CH2â€”Oâ€”CH2â€”CH(OH)â€”CH2â€”OH and â€”CH2â€”OH wherein said fluoropolyether is characterized by having alcohol hydration distribution of 0.48 or less which corresponds to difference between the greatest and smallest alcohol valences among component molecules and an average alcohol valence among component molecules within a range of 3.00 to 3.91.