The disclosure provides a fluoropolyether compound represented by formula (1):
R.sup.1CH.sub.2R.sup.2CH.sub.2R.sup.3
wherein R.sup.1 is C.sub.1-C.sub.10 alkoxy; R.sup.2 is (CF.sub.2).sub.pO(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(CF.sub.2).sub.p; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; p is an integer of 1 to 3; R.sup.3 is OCH.sub.2CH(OH)CH.sub.2OH, OCH.sub.2CH(OH)CH.sub.2OCH.sub.2CH(OH)CH.sub.2OH, O(CH.sub.2).sub.mOH, or OCH.sub.2(OH)CHCH.sub.2OC.sub.6H.sub.4R.sup.4; m is an integer of 2 to 8; and R.sup.4 is hydrogen, C.sub.1-C.sub.4 alkoxy, amino, or an amide residue; and also provides a lubricant having the compound and a magnetic disk.

A copolymer of polyalkylphenyl siloxane and alkylfluoroalkyl siloxane obtainable by reacting a dispersion of ingredient (i) an alkylfluoroalkyl siloxane and ingredient (ii) one or more polyalkylphenyl siloxane(s) in the presence of ingredient (iii) a basic catalyst at a temperature of between 40 C. to 300 C.

A fluorine-containing ether monocarboxylic acid aminoalkyl ester represented by the general formula:
C.sub.nF.sub.2n+1O[CF(CF.sub.3)CF.sub.2O].sub.aCF(CF.sub.3)COO(CH.sub.2).sub.bNR.sup.1R.sup.2
(wherein R.sup.1 is a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group, or an aralkyl group, preferably an alkyl group having 1 to 6 carbon atoms or an aryl group; R.sup.2 is an alkyl group having 1 to 12 carbon atoms, an aryl group, or an aralkyl group, preferably an alkyl group having 1 to 6 carbon atoms or an aryl group; n is an integer of 1 to 3; a is an integer of 2 to 20, preferably an integer of 4 to 10; and b is an integer of 1 to 12, preferably an integer of 1 to 3). Such a fluorine-containing ether monocarboxylic acid ester having an amino group at the end of the ester group is produced by reacting a perfluoroether carboxylic acid fluoride compound C.sub.nF.sub.2n+1O[CF(CF.sub.3)CF.sub.2O].sub.aCF(CF.sub.3)COF and a hydroxyalkyl amine compound HO(CH.sub.2).sub.bNR.sup.1R.sup.2 in the presence of an alkali metal fluoride.

The present invention relates to the field of lubricant, and specifically provides a lubricant composition and its preparation method and use. The lubricant composition comprises a base oil and rubber particles having radiation crosslinked structure dispersed therein, wherein the base oil is continuous phase and the rubber particles are dispersed phase. The viscosity of the lubricant composition of the present invention can be effectively adjusted as temperature changes. As compared with the lubricant composition comprising chemically crosslinked rubber particles, it has a lower viscosity at low temperatures and a higher viscosity at high temperatures, and has a relatively high viscosity index, which can meet the application requirements at the temperature above 200? C. In addition, the lubricant composition of the present invention also has excellent antiwear and friction-reducing properties.

Provided are low coefficient of friction fluoropolymer one coat coatings having a relatively low bake temperature. The fluoropolymer coatings contain high temperature resistant polymer binder, low melting tetrafluoroethylene/hexafluoropropylene copolymer having a melting point of below 255 C. by the method of ASTM D 4591, and low molecular weight polytetrafluoroethylene having a heat of crystallization of at least about 50 J/g.

A fluorine-containing ether monocarboxylic acid aminoalkyl ester represented by the general formula:

C.sub.nF.sub.2n+1O[CF(CF.sub.3)CF.sub.2O].sub.aCF(CF.sub.3)COO(CH.sub.2).sub.bNR.sup.1R.sup.2

(wherein R.sup.1 is a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an aryl group, or an aralkyl group, preferably an alkyl group having 1to 6 carbon atoms or an aryl group; R.sup.2 is an alkyl group having 1 to 12 carbon atoms, an aryl group, or an aralkyl group, preferably an alkyl group having 1to 6 carbon atoms or an aryl group; n is an integer of 1 to 3; a is an integer of 2 to 20, preferably an integer of 4 to 10; and b is an integer of 1 to 12, preferably an integer of 1 to 3). Such a fluorine-containing ether monocarboxylic acid ester having an amino group at the end of the ester group is produced by reacting a perfluoroether carboxylic acid fluoride compound C.sub.nF.sub.2n+1O[CF(CF.sub.3)CF.sub.2O].sub.1CF(CF.sub.3)COF and a hydroxyalkyl amine compound HO(CH.sub.2).sub.bNR.sup.1R.sup.2 in the presence of an alkali metal fluoride.

To provide a surface treatment agent capable of imparting excellent water/oil repellency, fingerprint stain removability, abrasion resistance and lubricity to the surface of a substrate.

A surface treatment agent for a substrate, comprising a perfluoropolyether group-containing phosphate compound, a coating agent comprising the surface treatment agent and a liquid medium, and a substrate having a surface layer formed from the surface treatment agent or the coating agent.

The disclosure provides a fluoropolyether compound represented by formula (1):

R.sup.1CH.sub.2R.sup.2CH.sub.2R.sup.3

wherein R.sup.1 is C.sub.1-C.sub.10 alkoxy; R.sup.2 is (CF.sub.2).sub.pO(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(CF.sub.2).sub.p; x and y are each a real number of 0 to 30; z is a real number of 0 to 30; w is a real number of 0 to 20; p is an integer of 1 to 3; R.sup.3 is OCH.sub.2CH(OH)CH.sub.2OH, OCH.sub.2CH(OH)CH.sub.2OCH.sub.2CH(OH)CH.sub.2OH, O(CH.sub.2).sub.mOH, or OCH.sub.2(OH)CHCH.sub.2OC.sub.6H.sub.4R.sup.4; m is an integer of 2 to 8; and R.sup.4 is hydrogen, C.sub.1-C.sub.4 alkoxy, amino, or an amide residue; and also provides a lubricant having the compound and a magnetic disk.

A lubricating oil friction modifier and a preparation method therefor and use thereof are provided. The lubricating oil friction modifier has a chemical formula of A.sub.xB.sup.y+(C.sup.).sub.y. In the formula, A is a perfluoropolyether acyl group, B.sup.y+ represents a cationic group having x amino groups and y ammonium ions, C.sup. is BF.sub.4.sup., PF.sub.6.sup., AsF.sub.6.sup., FAP.sup., TFSI.sup., Mn.sub.2O.sub.4 or ClO.sub.4.sup., x is an integer greater than or equal to 1, y is an integer greater than or equal to 1, and x+y2. The lubricating oil friction modifier has a good solubility with fluorine oil and fluorine grease, will not precipitate in the fluorine oil and the fluorine grease after being added, and can significantly improve the wear resistance of a lubricating oil such as the fluorine oil and the fluorine grease.

Medical articles formed from a polyurethane-based resin including a modifying oligomer provide enhanced properties. A modifying oligomer incorporated into a backbone, as a side chain, or both of the polyurethane-based resin formed by a diisocyanate, a polyglycol, and a diol chain extender has at least one, preferably two, alcohol moieties (COH) and a functional moiety. Exemplary modifying oligomers are: a diol-containing perfluoropolyether incorporated into the backbone, a monofunctional polysiloxane (e.g., monodialcohol-terminated polydimethylsiloxane) incorporated as the side chain, and combinations thereof. Medical articles herein are self-lubricating and/or anti-fouling.