A fluorine-containing ether compound according to the present invention is a fluorine-containing ether compound represented by the following General Formula (1).

[Chem. 1]

(F.sub.2C.sub.IA-B-D).sub.2(1)

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.

There is disclosed an antifoam component for a mechanical device which includes a fluorinated poly(acrylate) copolymer. The antifoam component has improved foam performance and thermal stability in finished fluids, such as driveline fluids.

Fluoropolyether compounds that can be used as a lubricant, such as for magnetic recording media. The compounds have a terminal group that includes a phenol or benzene. The fluoropolyether compounds reduce the head to media distance while keeping comparable reliability in a hard disk drive compared to current industrial widely used fluoropolyether based lubricants.

The present invention relates to a fluorine-containing ether compound represented by Formula (1),

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

(In Formula (1), R.sup.1 is an end group including an organic group having at least one double bond or triple bond, R.sup.2 is a divalent linking group bonded to R.sup.1 by etheric oxygen, R.sup.3 is a perfluoropolyether chain, R.sup.4 is an end group having two or three polar groups with each polar group being bonded to different carbon atoms, and the carbon atoms, to which the polar groups are bonded, being bonded to each other via a linking group including carbon atoms to which the polar groups are not bonded.)

An oleaginous corrosion-resistant lubricating composition comprising at least one poly-alpha olefin synthetic oil and effective amounts of metal salts of sulfonic acids, metal salts of carboxylic acids, metal salts of mixtures of said sulfonic and carboxylic acids, alkylated aromatic stabilizers as solubility modifiers, pour-point depressants, at least one antioxidant, triazole deactivator compounds and fluoroacrylate copolymers.

The object of the present invention is to provide a foreign substance removing lubricant composition having high foreign substance removing effects and being capable of improving the lubricating properties as compared to conventional lubricant compositions, a foreign substance removing lubricant composition applied member, and a method for using the foreign substance removing lubricant composition. The foreign substance removing lubricant composition of the present invention comprises a perfluoroalkyl group containing compound (S) having a perfluoroalkyl group or a fluoropolyether containing compound. As a result, foreign substance removing effects can be enhanced, and the lubricating properties can be improved as compared to the conventional lubricant compositions.

An oleaginous corrosion-resistant lubricating composition comprising at least one poly-alpha olefin synthetic oil and effective amounts of metal salts of sulfonic acids, metal salts of carboxylic acids, metal salts of mixtures of said sulfonic and carboxylic acids, alkylated aromatic stabilizers as solubility modifiers, pour-point depressants, at least one antioxidant, triazole deactivator compounds and fluoroacrylate copolymers.

An epilamization agent containing at least one compound including at least hydrophobic and oleophobic moieties arranged to impart epilame properties to the compound, and at least one hydrophilic moiety arranged to make the compound soluble in aqueous medium, the hydrophilic moiety being linked to the compound by at least one cleavable group. A method for coating a substrate with epilame, including: preparing an aqueous epilamization bath by solubilising such an epilamization agent, placing the substrate in contact with the epilamization agent in the epilamization bath, separating the hydrophilic moiety from the epilamization agent by cleavage, rinsing the substrate to eliminate the hydrophilic residues from the hydrophilic moiety and drying.

The present invention relates to a viscosity index improver containing a copolymer (A) that contains, as essential constituent monomers, a fluorine atom-containing monomer (a) represented by the following formula (1) and a monomer (b) represented by the following formula (2),

wherein the copolymer (A) has a solubility parameter of 8.1 to 10.0 (cal/cm.sup.3).sup.1/2, and a mass ratio (b/a) of the monomer (b) to the monomer (a) in the monomers constituting the copolymer (A) is 0.01 to 42:

##STR00001##

wherein R.sup.1 represents a hydrogen atom or a methyl group; R.sup.2 is a C2-C4 alkylene group; p is an integer of 0 or 1; q is an integer from 0 to 20, each R.sup.2 may be the same as or different from each other when q is 2 or greater; and Y is a monovalent group in which one or more or all of hydrogen atoms in a C1-C40 hydrocarbon group are replaced by fluorine atoms, and

##STR00002##

wherein R.sup.3 represents a hydrogen atom or a methyl group; X.sup.1 is a group represented by O or NH; R.sup.4 is a C2-C4 alkylene group; r is an integer of 0 or 1; s is an integer from 0 to 20, and each R.sup.4 may be the same as or different from each other when s is 2 or greater; and R.sup.5 is a C1-C40 hydrocarbon group.