Patent ID: 6096694
Filing Date: 2000-08-01
Classification: C08G,C10M,C10N,G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:a magnetic layer;a carbon protective layer formed on said magnetic layer; anda liquid lubricant layer formed on said carbon protective layer, said liquid lubricant layer being formed of the perfluoropolyether liquid lubricant;wherein the liquid lubricant includes a main chain structure which is represented by one selected from a group consisting of general formulas (1), (2) and (3), said perfluoropolyether having a tertiary amine functional group at at least one end of a chain molecule, said general formula (1) being expressed by:R.sup.1 H.sub.2 C--(CF.sub.2 CF.sub.2 O).sub.m --(CF.sub.2 O).sub.n --CH.sub.2 R.sup.2 ( 1)where R.sup.1 and R.sup.2 are the same functional group or different functional groups, and each of m and n is an integer, said general formula (2) being expressed by:F(CF.sub.2 CF.sub.2 CF.sub.2 O).sub.m --CH.sub.2 R.sup.3 ( 2)where R.sup.3 is a functional group, and m is an integer, said general formula (3) being expressed by: ##STR14## where R.sup.4 is a functional group, and m is an integer.