The present invention relates to a magnetic recording medium in which a lubricant layer contains a compound A represented by general formula (1) and a compound B represented by general formula (2), satisfying (A/B)=0.2 to 3.0, and has an average thickness of 0.8 nm to 2 nm. R.sup.1C.sub.6H.sub.4OCH.sub.2CH(OH)CH.sub.2OCH.sub.2R.sup.2CH.sub.2OCH.sub.2CH(OH)CH.sub.2OH . . . (1) (R.sup.1 is an alkoxy group having 1 to 4 carbon atoms. R.sup.2 is CF.sub.2O(CF.sub.2CF.sub.2O).sub.x(CF.sub.2O).sub.yCF.sub.2 (x, y=0 to 15), CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.zCF.sub.2CF.sub.2 (z=1 to 15), CF.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2CF.sub.2O).sub.nCF.sub.2CF.sub.2CF.sub.2 (n=0 to 4). HOCH.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.mCF.sub.2CF.sub.2CH.sub.2OCH.sub.2CH(OH)CH.sub.2OH . . . (2) (m is an integer).

The present invention relates to a magnetic recording medium in which a lubricant layer contains a compound A represented by general formula (1) and a compound B represented by general formula (2), satisfying (A/B)=0.2 to 3.0, and has an average thickness of 0.8 nm to 2 nm. R.sup.1C.sub.6H.sub.4OCH.sub.2CH(OH)CH.sub.2OCH.sub.2R.sup.2CH.sub.2OCH.sub.2CH(OH)CH.sub.2OH . . . (1) (R.sup.1 is an alkoxy group having 1 to 4 carbon atoms. R.sup.2 is CF.sub.2O(CF.sub.2CF.sub.2O).sub.x(CF.sub.2O).sub.yCF.sub.2 (x, y=0 to 15), CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.zCF.sub.2CF.sub.2 (z=1 to 15), CF.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2CF.sub.2O).sub.nCF.sub.2CF.sub.2CF.sub.2 (n=0 to 4). HOCH.sub.2CF.sub.2CF.sub.2O(CF.sub.2CF.sub.2CF.sub.2O).sub.mCF.sub.2CF.sub.2CH.sub.2OCH.sub.2CH(OH)CH.sub.2OH . . . (2) (m is an integer).

Provided herein is a lubricant including a compound of Formula I
L-(CF.sub.2CF.sub.2O).sub.nCF.sub.2CH.sub.2ONOCH.sub.2CF.sub.2O(CF.sub.2CF.sub.2O).sub.m-M(Formula I) wherein L is selected from the group consisting of ##STR00001## M is selected from the group consisting of ##STR00002## wherein each instance of R.sup.1, R.sup.2, and R.sup.3 is independently selected from the group consisting of hydroxyl, alkoxyl, carbocycyl, phenyl, heterocycyl, piperonyl, carboxyl, alkylamido, acetamido, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, 2,3-dihydroxy-1-propoxyl, acryloyl, alkacryloyl, methacryloyl, a sustituent of methyl methacrylate, and a substituent of glycidyl ether; and wherein n1, m1, and n and m are the same or different.

Provided herein is a lubricant including a compound of Formula I
L-(CF.sub.2CF.sub.2O).sub.nCF.sub.2CH.sub.2ONOCH.sub.2CF.sub.2O(CF.sub.2CF.sub.2O).sub.m-M(Formula I) wherein L is selected from the group consisting of ##STR00001## M is selected from the group consisting of ##STR00002## wherein each instance of R.sup.1, R.sup.2, and R.sup.3 is independently selected from the group consisting of hydroxyl, alkoxyl, carbocycyl, phenyl, heterocycyl, piperonyl, carboxyl, alkylamido, acetamido, carbamoyl, N-alkylcarbamoyl, N,N-dialkylcarbamoyl, 2,3-dihydroxy-1-propoxyl, acryloyl, alkacryloyl, methacryloyl, a sustituent of methyl methacrylate, and a substituent of glycidyl ether; and wherein n1, m1, and n and m are the same or different.

Provided herein is a lubricant comprising a compound of Formula I:

##STR00001##

wherein R.sub.1 and R.sub.2 are independent and have the structure selected from (CF.sub.2O).sub.x(CF.sub.2CF.sub.2O).sub.y(CF.sub.2CF.sub.2CF.sub.2O).sub.z(CF.sub.2CF.sub.2CF.sub.2CF.sub.2O).sub.w, x, y, z and w are selected from an integer from 0 to 30; p, and q are selected from an integer from 0 to 3; A and B are independent and have the structure selected from: (CH.sub.2CH(OH)CH.sub.2O).sub.jH, and j is an integer selected from 0 to 3.

A fluorine-containing ether compound represented by Formula (1) is provided;

R.sup.1R.sup.2CH.sub.2R.sup.3CH.sub.2R.sup.4R.sup.5(1)

(In Formula (1), R.sup.1 and R.sup.5 may be the same as or different from each other and each represents an alkenyl group having 2 to 8 carbon atoms or an alkynyl group having 3 to 8 carbon atoms, R.sup.2 and R.sup.4 may be the same as or different from each other and each represents a divalent linking group having a polar group, and R.sup.3 represents a perfluoropolyether chain, with a proviso that R.sup.1 and R.sup.2 are, and R.sup.4 and R.sup.5 are divided due to the presence of an atom other than the carbon atom such as an oxygen atom).

A fluorine-containing ether compound represented by Formula (1) is provided;

R.sup.1R.sup.2CH.sub.2R.sup.3CH.sub.2R.sup.4R.sup.5(1)

(In Formula (1), R.sup.1 and R.sup.5 may be the same as or different from each other and each represents an alkenyl group having 2 to 8 carbon atoms or an alkynyl group having 3 to 8 carbon atoms, R.sup.2 and R.sup.4 may be the same as or different from each other and each represents a divalent linking group having a polar group, and R.sup.3 represents a perfluoropolyether chain, with a proviso that R.sup.1 and R.sup.2 are, and R.sup.4 and R.sup.5 are divided due to the presence of an atom other than the carbon atom such as an oxygen atom).

The present invention provides a fluorine-containing ether compound represented by the following Formula. R.sup.1-[B]-[A]-CH.sub.2R.sup.2CH.sub.2-[C]-[D]-R.sup.3 (R.sup.2 is a perfluoropolyether chain; [A] is Formula (2-1); [B] is Formula (2-2); [C] is Formula (3-1); [D] is Formula (3-2); R.sup.3 is Formula (4); and R.sup.1 is a terminal group.)

##STR00001##

High temperature lubricants for magnetic media are provided. One such lubricant includes fluoroalkyl, fluoroalkenyl, perfluoroalkyl, or perfluoroalkyl ether segments, anchoring functional groups engageable with a protective overcoat of a magnetic recording media, and cyclic functional groups. The lubricants can be used in conjunction with a magnetic recording medium and/or a magnetic data storage system.

A fullerene derivative of the present invention has a fullerene skeleton and a plurality of perfluoropolyether chains in a molecule, wherein the perfluoropolyether chains are bonded to the fullerene skeleton via methano groups, and a lubricant and fluororesin composition of the present invention contain the derivative.