Patent ID: 6559108
Filing Date: 2003-05-06
Classification: C07F,C10M,C10N,C23F,Y10T

Abstract:
A recording medium comprising a lubricant whereinsaid recording medium is magnetic medium, magneto-optical medium, or optical medium; said lubricant comprises a phosphorus-containing fluorocarbon compound selected from the group consisting of compound A, compound B, compound C, and combinations of two or more thereof; said compound A is a perfluoropolyether- or perfluoroalkyl-containing and phosphorus-containing compound selected from the group consisting of partially esterified aryl phosphates, partially esterified aryl phosphonates, and salts thereof, containing either (i) a mono-alkylene oxide or poly-alkylene oxide or phenylene oxide linking group between the phosphorus and a fluorocarbon group, (ii) no linking group between the phosphorus and fluorocarbon group, or (iii) combinations of (i) and (ii); said compound B is an asymmetrical perfluoropolyether- or perfluoroalkyl-containing and phosphorus-containing compound selected from the group consisting of (i) aryl phosphites or phosphates containing a phenylene oxide linking group between the phosphorus and a perfluoroether group, (ii) aryl phosphines, aryl phosphinites, aryl phosphonites, aryl phosphine oxides, aryl phosphinates or aryl phosphonates with no linking group between the phosphorus and a fluorocarbon group, and (iii) combinations of (i) and (ii); and said compound C is a perfluoropolyether- or perfluoroalkyl-containing and phosphorus-containing compound selected from the group consisting of partially esterified phosphates, partially esterified phosphonates, and salts thereof, containing either (i) a phenylene oxide linking group between the phosphorus and a fluorocarbon group, (ii) no linking group between the phosphorus and fluorocarbon group, and (iii) combinations of (i) and (ii).