Abstract: A compound of the formula (1), lubricant containing the compound and magnetic disk R1—C6H4O—CH2CH(OH)CH2OCH2—R2—CH2—O—R3??(1) wherein R1 is hydrogen, alkoxyl having 1 to 4 carbon atoms, amino or amido, R2 is —CF2O(CF2CF2O)x(CF2O)yCF2—, —CF2CF2O(CF2CF2CF2O)z—CF2CF2— or —CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2—, x and y are each an integer of 0 to 15, z is an integer of 1 to 15, n is an integer of 0 to 4, R3 is —CH2CH(OH)CH2OH, —CH2CH(OH)CH2OCH2CH(OH)CH2OH or —(CH2)mOH, m is an integer of 2 to 6.

Abstract: Disclosed is a cylinder liner having a high bonding strength to a cylinder block. Further disclosed is a method for producing the same. The cylinder liner uses a silicon-aluminum alloy as a material; a plurality of protrusions are formed on the external surface thereof; and the protrusions each contain a pillar section extending from the external surface, and a head section formed at the end of the pillar section.

Abstract: An object of the present invention is to provide a compound (lubricant) that exhibits better fluidity and adsorbability on the surface of a disk than conventional end-modified compounds, that is thermally stable, and that is obtained by introducing an additional functional group to the end(s) of a perfluoropolyether having a hydroxy group. The present invention relates to a lubricant comprising a perfluoropolyether compound containing, in the molecule, a group represented by Formula (2), wherein R represents a hydrogen, a C1-10 alkyl group, or an alkoxy group, and n is 1 or 2.

Abstract: A compound of the formula (I), and lubricant, and magnetic disk each using the same A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A??(I) wherein n is an integer of 1 to 4, A is a group of the formula (a) below, and B is a group of the formula (b) below, p being 1 or 2, R being C1-4 fluoroalkyl, Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2—, x, y and z being each a real number of 0 to 50.

Abstract: A lubricant containing a compound of the formula (I) wherein n is substantially 2, 3 or 4, R is C1-4 fluoroalkyl and Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2— in which x, y and z are each 0 or a positive real number to give a number average molecular weight of 500 to 2000 to a fluoropolyether of the formula HOCH2—Rf—CH2OH including said Rf, the fluoropolyether having a molecular weight distribution (PD, weight average molecular weight/number average molecular weight) of 1.0 to 1.5.

Abstract: The present invention provides a lubricant for recording media that does not readily decompose, and which has high adhesion to recording media, and a magnetic disk that is durable against continuous sliding under high-speed rotation. The present invention provides a lubricant for recording media containing: a perfluoropolyether compound represented by Formula (1), R1—CH2CF2O—(CF2CF2O)m—(CF2O)n—CF2CH2—R2??(1) wherein R1 represents R represents a C1-4 haloalkyl group, R2 represents —OCH2CH(OH)CH2OH, and m and n are each independently 1-30; and another perfluoropolyether compound represented by Formula (2), R1—CH2CF2O—(CF2CF2O)m—(CF2O)n—CF2CH2—R3??(2) wherein R1, m and n are as defined above and R3 represents —OCH2CH(OH)CH2OCH2CH(OH)CH2OH. The present invention also provides a magnetic disk having a lubricating layer essentially consists of such a lubricant.