Provided is a lubricant composition having small shear rate dependence of its apparent viscosity. The lubricant composition includes a perfluoropolyether as a base oil, and fluorine resin particles as a thickener. The lubricant composition further includes a fluorine-containing polymer having a tetrafluoroethylene structure under a state in which the polymer is dissolved in the perfluoropolyether.

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 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.

The present invention provides stable water-in-oil emulsions suitable for use as fire-resistant aerosol multipurpose lubricants. The water-in-oil emulsion comprises a synthetic ester base oil, compatible invert emulsifier, water, and a preservative. The aerosol apparatus employs a larger than standard stem orifice to produce a non-flammable aerosol.

A grease of the invention contains a fluorine synthetic oil as a base oil and an inorganic acid salt that is at least one selected from phosphate, tungstate, sulfate and sulfite. The grease of the invention is suitably usable in a bearing, a gear and the like because of an excellent wear resistance and a low environmental burden.

A fluorine-containing ether compound represented by a formula (1) shown below.

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

In formula (1), R.sup.1 and R.sup.3 represent the same or different perfluoropolyether chains, R.sup.2 represents a linking group containing at least one polar group, one or both of R.sup.4 and R.sup.5 represent a terminal group containing two or more polar groups, and R.sup.4 and R.sup.5 are different.

According to one aspect of the present invention, an organic fluorine compound is represented by a general formula

(R--E-CH.sub.2).sub.2-A(1A)

(where A is a divalent perfluoropolyether group, is an arylene group or a single bond, R is an alkenyl group or an alkynyl group, and E is an ether bond or an ester bond or a group that is represented by a chemical formula

OCH.sub.2CH(OH)CH.sub.2O

two groups each of which is represented by a general formula

R--E-CH.sub.2

may be the same or different, and at least one n among two is an arylene group).

According to one aspect of the present invention, an organic fluorine compound is represented by a general formula

(R--E-CH.sub.2-A-CH.sub.2-E).sub.n--G(1B) (where n is an integer of 2 to 5, A is a divalent perfluoropolyether group, is an arylene group or a single bond, R is an alkenyl group or an alkynyl group, and E and E are each independently an ether bond or an ester bond or a group that is represented by a chemical formula

OCH.sub.2CH(OH)CH.sub.2O

is a group in which n+1 hydrogen atoms are separated from benzene, G is an organic group containing a fullerene skeleton, the n number of groups each of which is represented by a general formula

R--E-CH.sub.2-A-CH.sub.2-E-

may be the same or different, and at least one among the n number of is an arylene group).

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.

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.