Abstract: This invention relates to lubricant compositions comprising a polyalkylene glycol and an ester wherein the polyalkylene glycol has the formula:

Abstract: To provide a polyalkylene glycol-based refrigerant oil for refrigerators using ammonia as a refrigerant.

Abstract: Low-foam emulsifier system consisting of:

Abstract: The present invention provides a rheology control agent of oil, which can impart a remarkably high elastic modulus with being sufficiently flowable as liquid by adding the same to the oil and it provides an oil composition having the greatly improved rheology characteristics.

Abstract: A lubricant containing (a) a synthetic base oil composition having an overall kinematic viscosity of at least about 4.8×10−6 m2/s (4.8 cSt) at 100° C. and a viscosity index of at least about 110; (b) a dispersant-viscosity modifier; and (c) a sulfur-free functionalized hydrocarbyl-substituted phenol detergent provides improved valve train wear, with longer drain intervals, to heavy duty diesel engines.

Abstract: Disclosed is a machining fluid admixture for cooling and lubricating a workpiece/tool interface, wherein the admixture comprises a major amount of n-propyl bromide and a minor amount of a lubricant. In other embodiments, the machining fluid consists essentially of about 30.0 to about 99.99 weight percent n-propyl bromide; from about 0.01 to about 30.0 weight percent of a lubricant; and optionally from 0.0 to about 70.0 weight percent of a fluorinated chemical. In still further embodiments, the machining fluid consists essentially of about 45.0 to about 50.0 weight percent n-propyl bromide; from about 0.01 to about 2.0 weight percent of a lubricant; and from 45.0 to about 50.0 weight percent of a fluorinated chemical. In other aspects, the present invention is directed to methods for cooling and lubricating a tool/workpiece interface.

Abstract: A refrigerating oil composition which exhibits excellent lubrication properties when used in combination with certain types of coolant, such as a hydrofluorocarbon coolant, which may serve as substitutes for chlorofluorocarbon coolants which have been implicated as causing environmental problems. The refrigerating oil composition of the present invention is obtained by incorporating, into a component (A); i.e., a base oil containing a synthetic oil, a component (B); i.e, a polyalkylene glycol derivative of formula (I) having a number average molecular weight of 200-3,000: R1—(OR2)m—(OR3)n—OR4  (I) wherein R1 and R4 represent C1-C30 hydrocarbon groups, etc.; R2 represents a C2-C4 alkylene group; R3 represents a C2-C30 alkylene group; m and n are numbers that satisfy the above-described molecular weight conditions, wherein n may be 0; and at least one of R1, R3, and R4 has a hydrocarbon group having six or more carbon atoms.

Abstract: A lubricating oil for a flon refrigerant, containing a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, a viscosity index of at least 150 and a water content of not more than 200 ppm as a main component. The lubricating oil of the present invention has good stability in the presence of a flon refrigerant, does not cause the copper plating phenomenon and has good compatibility with not only flon-11 and flon-12 but also sparingly soluble refrigerants such as hydrogen-containing flon compounds and perfluoroalkane.

Abstract: Provided is a refrigerator oil, especially that for carbon dioxide refrigerant, which comprises a base oil comprising an oxygen-containing organic compound as the essential component and having a kinematic viscosity at 100° C. of from 5 to 50 mm2/sec and a viscosity index of at least 60, and optionally contains additives of, for example, extreme pressure agent and acid scavenger. The refrigerator oil can be used in compression refrigerators with carbon dioxide refrigerant therein, concretely in refrigerating or heating-cooling equipment such as car air conditioners, refrigerators, freezers, air conditioners, heat pumps, compression refrigeration cycles equipped with oil separator and/or hot gas line, etc. This is stable and has excellent lubricity (abrasion resistance) even in a supercritical carbon dioxide atmosphere, and therefore can be used for a long period of time in the atmosphere.

Abstract: A method of dispensing a lubricant into a micromechanical device package and a micromechanical device package containing the lubricant. The method comprises the steps of mixing (102) the lubricant, typically a perfluoroalkanoic acid such as perfluorodecanoic acid with a suitable solvent, typically an ether solvent such as tetrahydrofuran or tert-butyl methyl ether. The mixture is allowed to equilibriate (104) before being filtered (106) to remove solid particles. The filtered solution is applied (108) to a surface that will be on the interior of the package, typically the ceramic substrate. The deposited mixture is then cured (110) to remove most, if not all, of the solvent, and the package is sealed (112).

Abstract: A lubricating oil for a flon refrigerant, containing a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, a viscosity index of at least 150 and a water content of not more than 200 ppm as a main component. The lubricating oil of the present invention has good stability in the presence of a flon refrigerant, does not cause the copper plating phenomenon and has good compatibility with not only flon-11 and flon-12 but also sparingly soluble refrigerants such as hydrogen-containing flon compounds and perfluoroalkane.

Abstract: The present invention is a lubricant composition, composed of a lubricant base oil containing: a (poly)glyceryl ether represented by the following general formula (1) 1

Abstract: This invention describes a contact lubricant composition for protecting electrical contacts from failure by fretting damage. This lubricant composition is also able to restore and rejuvenate electrical contacts that have failed in service by fretting damage, allowing such contacts to be returned to service. This contact lubricant consists of an optimum mixture of fifty volume percent polyphenyl ether and fifty volume percent polypropylene monobutyl ether. This combination of materials in a lubricant mixture is still effective at volume percentages of polyphenyl ether as low as ten volume percent. This contact lubricant composition was developed and demonstrated to be effective by extensive laboratory fretting tests on various common electrical contact materials and configurations.

Abstract: A lubricant-refrigerant composition for a compression refrigeration system is disclosed which comprises (A) carbon dioxide refrigerant, and (B) a lubricant of an aliphatic naphthalene. A supplemental lubricant comprising at least one alkyl benzene, a hydrocarbon, a polyalkylene glycol, a polyol ester or a polyvinyl ether may also be present. Additionally, a performance additive comprising an alkoxylated alcohol or phenol, an alkoxylated glycol, an alkyl phenol or a phosphorus compound may also be present.

Abstract: A method for mixing an organic chemical substance with a carrier solvent, wherein the carrier solvent comprises at least one fluorinated solvent A selected from the group consisting of (perfluorohexyloxy)methane and tridecafluorohexane.

Abstract: A lubricating oil for compression-type refrigerators using a refrigerant containing pentafluoroethane which lubricating oil comprises a polyvinyl ether compound having (a) a constituting unit represented by general formula (I): or a polyvinyl ether compound having constituting unit (a) and (b) a constituting unit represented by general formula (I′): (wherein R represents a hydrocarbon group which has 1 to 3 carbon atoms and may have ether bond in the group, and R′ represents a hydrocarbon group which has 3 to 20 carbon atoms and may have ether bond in the group) as the main component. The above lubricating oil shows excellent compatibility with hydrofluorocarbon refrigerants containing pentafluoroethane which can replace chlorofluorocarbons causing environmental pollution, has a high volume intrinsic resistance, and exhibits excellent stability and lubricating property.

Abstract: Hydraulic or industrial functional fluids which exhibit excellent demulse performance are prepared comprising at least one oil-soluble polyoxypropylene glycol monoalkyl ether.

Abstract: A process for preparing a stable cooling lubricant emulsion for use in the cutting of metals involves the steps of (a) forming a mixture having an oil component, water and an emulsifier with the oil component being emulsified in the water, then (b) dispersing into 100 parts by weight of the mixture by means of high shear from about 1 to about 14 parts by weight of a natural, water-immiscible cutting oil. The stable oil-in-water cooling lubricant emulsion formed has at least 50 percent of the cutting oil present in the form of particles having a diameter of 0.5 to 8 &mgr;m. The cooling lubricant emulsion formed may be used in an extended range of applications.

Abstract: Refrigerating machine oils comprises for use with a refrigerant containing ammonia, which comprises a polypropylene glycol monoether represented by the formula wherein R is an alkyl group having 1 to 10 carbon atoms and n is an integer to be selected such that the number-average molecular weight becomes 500 to 5,000.

Abstract: Lubricating oils exhibiting anti rust properties are obtained by adding to the lubricating oil an acidic anti rust additive and an acid scavenger such as carbodiimide, in a specific sequence.

Abstract: The passage of a container along a conveyor is lubricated by applying to the container or conveyor a phase-separating mixture of a hydrophilic lubricating material and an oleophilic lubricating material whose specific gravity is less than or equal to the specific gravity of the hydrophilic lubricating material. Prior to being applied to the container or conveyor, the mixture is agitated or otherwise maintained in a mixed but unstable state. Following application, the hydrophilic lubricating material and oleophilic lubricating material tend to undergo phase-separation, with the oleophilic lubricating material typically forming a film atop the hydrophilic lubricating material, thereby providing a water-repelling lubricating layer having reduced water sensitivity. The mixture can be applied in relatively low amounts and with relatively low or no water content, to provide thin, substantially non-dripping lubricating films.

Abstract: Disclosed is a lubricating composition having a major amount of an oil of lubrication viscosity and a minor amount of (A) a nitrogen containing dispersant with a total base number of from 20 to 160 on an oil-free basis wherein the improvement comprises adding to said dispersant; (B) a sludge preventing/seal protecting additive of at least one aldehyde or epoxide or mixtures thereof.

Abstract: A refrigerating oil composition which exhibits excellent lubrication properties when used in combination with certain types of coolant, such as a hydrofluorocarbon coolant, which may serve as substitutes for chlorofluorocarbon coolants which have been implicated as causing environmental problems. The refrigerating oil composition of the present invention is obtained by incorporating, into a component (A); i.e., a base oil containing a synthetic oil, a component (B); i.e, a polyalkylene glycol derivative of formula (I) having a number average molecular weight of 200-3,000: R1—(OR2)m—(OR3)n—OR4  (I) wherein R1 and R4 represent C1-C30 hydrocarbon groups, etc.; R2 represents a C2-C4 alkylene group; R3 represents a C2-C30 alkylene group; m and n are numbers that satisfy the above-described molecular weight conditions, wherein n may be 0; and at least one of R1, R3, and R4 has a hydrocarbon group having six or more carbon atoms.

Abstract: A lubricating oil for a flon refrigerant, containing a polyglycol compound having a kinematic viscosity at 40° C. of at least 30 cSt, a viscosity index of at least 150 and a water content of not more than 200 ppm as a main component. The lubricating oil of the present invention has good stability in the presence of a flon refrigerant, does not cause the copper plating phenomenon and has good compatibility with not only flon-11 and flon-12 but also sparingly soluble refrigerants such as hydrogen-containing flon compounds and perfluoroalkane.

Abstract: Refrigerant/lubricant compositions comprising a hydrofluoroalkane, e.g. R-134a, and a polyether which is the methyl encapped polooxypropylene ether of glycerol.

Abstract: Block copolyethers having general formula (I):RX--(CH.sub.2 --CHR.sub.1 --O--).sub.x --(--CH.sub.2 CHR.sub.2 --O--).sub.y --(--CH.sub.2 --CHR.sub.3 --O--).sub.z --R.sub.4wherein:R is selected from H, alkyl, alkylaryl;X is selected from O, S and N;R.sub.1, R.sub.2 and R.sub.3 are selected from H, CH.sub.3, and C.sub.2 -C.sub.10 alkyl radicals;R.sub.4 is selected from H, alkyl, acyl;x,y,z represent the number of ether units and are integers which have such values that the molecular weight of the compound having general formula (I) is between 600 and 4000, and in addition (x+z)/y is between 1.5 and 5.0; with the proviso that:a) either R.sub.1 and R.sub.3 are selected from H and CH.sub.3, in which case R.sub.2 is selected from C.sub.2 to C.sub.10 alkyl radicals,b) or R.sub.1 and R.sub.3 are selected from C.sub.2 -C.sub.10 alkyl radicals, in which case R.sub.2 is selected from H and CH.sub.3.

Abstract: A lubricating composition comprising a liquid crystal and a surfactant is disclosed. The inventive composition increase the lubricity of lubricant oils, reduce the wear rate or metals being lubricated, and increase the load bearing properties of lubricants between various surfaces, for example, within an engine and in the rolling of metals.

Abstract: The present invention relates to a lubricating basestock comprising a blend of (A) at least one polyalkylene glycol and (B) at least one alkyl aromatic. Additives, such as antioxidants, corrosion inhibitors, and metal deactivators, can be added to the lubricating basestock. In one embodiment, the lubricating composition is free of naphthol. The blend can also be used in combination with a variety of oils of lubricating viscosity, with or without additives therein. According to the present invention, the lubricating composition exhibits excellent oxidation and thermal stability, demulsibility, and hydrolytic stability. The lubricating composition is particularly useful as a positive displacement compressor lubricant.

Abstract: Lubricants are provided which are aluminium or aluminium alloy plate moulding lubricants, and are lubricants which are easily removed after moulding of aluminium or aluminium alloy plate and assembly; also, bonding and welding can be performed while coated with those lubricants, and the bonding and weld strength obtained are the same as if there were no adhering lubricant. Their main constituents are a polyalkylene oxide or derivative thereof and a higher fatty acid salt. It is preferable if they contain 50 to 2 weight % polyalkylene oxide or derivative thereof, and the ratio of higher fatty acid salt and polyalkylene oxide or derivative thereof is within the range 1/12 to 1/4, and further that they contain water. When these lubricants are formed into a 0.2-2.0 g/m.sup.2 solid film on the surface of the aluminium or aluminium alloy plate, this is suitable for moulding processes.

Abstract: Homogeneous lubricant blends are disclosed comprising polyether liquid lubricants miscible with synthetic hydrocarbon fluids or severely hydroprocessed basestock. The lubricants comprise SHF or hydroprocessed basestock and polyalkylene oxide polymer having recurring units of at least one long chain monoepoxy alkane monomer(s) containing 8 to 30 carbon atoms and short chain comonomer(s) selected from the group consisting of substituted or unsubstituted tetrahydrofuran, oxetan, butylene oxide propylene oxide and ethylene oxide wherein the mole ratio of long chain monoepoxy alkane monomers to short chain comonomers is between 0.5 and 9.

Abstract: This invention provides a refrigerator oil, a working fluid for a refrigerator, and a method for lubricating a refrigeration system, which can inhibit the creation of deposits attributable to metal working oils remaining within a refrigeration system. The refrigerator oil contains: a polyhydric alcohol ester compound as a lube base oil, and 0.5 to 4.5% by weight of at least one polyoxyalkylene compound. The working fluid for a refrigerator, containing: the above refrigerator oil, and a hydrofluorocarbon refrigerant. A method for lubricating a refrigeration system contaminated with metal working oils, containing a component sparingly soluble in the polyhydric alcohol ester compound or the hydrofluorocarbon refrigerant, or metal working oils, containing a component highly reactive with the polyhydric alcohol ester compound or the hydrofluorocarbon refrigerant, remaining therein, wherein the above working fluid for a refrigerator is used as a working fluid.

Abstract: Disclosed is a refrigerator oil composition comprising at least one base oil selected from mineral oils and synthetic oils, and at least one polyoxyethylene-type nonionic surfactant. The composition has an excellent lubricating property, while specifically improving the lubricity between aluminium materials and steel materials. This is effective for preventing such materials from being seized and worn, and is suitable as a lubricating oil in refrigerators using hydrogen-containing Flon refrigerants, such as R134a, that do not cause environmental pollution.

Abstract: A cleaning and lubricant formulation for use on spindles on cotton picker or harvesting machines that simultaneously cleans and lubricates the surface of the spindles. The formulation features a major proportion of water and amounts of unsaturated fatty acids, glycol ether and alcohol solvents, nonionic surfactant, amide cosurfactant, and polycarboxylic acid. An alkalizing agent is added to control the pH of the resulting formulation. The cleaning and lubricant formulation exhibits excellent cleaning and lubrication properties without utilizing petroleum oil that can contaminate cotton fields, water supplies or the harvested cotton.

Abstract: A lubricating composition which may contain up to 70 weight percent abrasive grit material for use with wire saw and slicing apparatus for cutting or slicing hard and brittle materials. The composition contains abrasive particles suspended in a mixture of high and low molecular weight polyalkylene glycols and a suspension agent. The viscosity of the composition is about 50 to 700 cps.

Abstract: The invention relates to an additive for improving the flow properties of paraffin-containing mineral oils and mineral oil distillates, comprising a mixture of at least one ethylene/vinyl ester copolymer or terpolymer and at least one paraffin dispersant, wherein said mixture contains ethers and/or esters as solubilizers, wherea) the ethers conform to the formula 1R--O--R' (1)in which R is a linear or branched alkyl or alkenyl group having 4 to 30 carbon atoms, and R' is a linear or branched alkyl or alkenyl group having 1 to 30 carbon atoms,b) the esters are derived from monobasic or polybasic carboxylic acids having 4 to 30 carbon atoms (acid radical) and from monohydric or polyhydric alcohols having 1 to 30 carbon atoms (alcohol radical), orc) the ethers and/or esters are cyclic, with a ring size of from 6 to 30 carbon atoms.The invention furthermore relates to a process for improving the flow properties of mineral oils and mineral oil distillates which comprises adding the novel additive thereto.

Abstract: Polyol ether derivatives, a method for producing the polyol ether derivatives, and a working fluid composition for a refrigerating machine containing a hydrofluorocarbon and a refrigeration oil containing the polyol ether derivatives as a base oil.

Abstract: There is disclosed a lubricating oil for compression-type refrigerators comprising a polyvinyl ether compound which contains a constituting unit represented by the general formula (I), a polyvinyl ether compound which contains constituting units represented by each one of the general formulae (I) and (II), or a mixture of these polyvinyl ether compounds, as the main component thereof. Ratio by mol of carbon to oxygen in the above polyvinyl ether compounds is 4.2 to 7.0. Also disclosed is a lubricating oil for compression-type refrigerators comprising a polyvinyl ether compound containing constituting units which are both represented by the general formula (I) but between which R.sup.5 is different.

Abstract: A drilling fluid additive for use during drilling and excavating applications, the additive comprises a mixture of an oil, an ester alcohol, nonionic surfactant and polypropylene glycol; and a method for manufacturing a drilling fluid additive comprising the step of admixing an oil, an ester alcohol, a nonionic surfactant, and a polypropylene glycol.

Abstract: Disclosed is a refrigerator oil composition comprising at least one base oil selected from mineral oils and synthetic oils, and at least one polyether compound having a kinematic viscosity of from 200 to 10000 mm.sup.2 /sec at 100.degree. C. The composition has an excellent lubricating property, while specifically improving the lubricity of bearings. This is effective for preventing bearings from being seized and fatigued, and is suitable as a lubricating oil in refrigerators using hydrogen-containing Flon refrigerants, such as R134a, that do not cause environmental pollution.

Abstract: The disclosure deals with a slip enhancer composition for use in printing operations, such as web heatset and gravure printing operations, said composition comprising: (a). about 0.05% to about 7% by weight of a water soluble polymer having an average molecular weight above about 20,000, (b) about 0.01% to about 7% by weight of a biocide agent to assist in preventing rancidity and for stabilizing of the composition, (c) 0.01% to about 25% by weight of water dispersible wax, (d) 0.01% to about 10% by weight of a surfactant to assist as a defoamer/anti-static agent for the composition, (e) 0.02% to about 20% by weight of an olfactory agent, and a liquid carrier as the balance of the composition.

Abstract: The combination (mixture and/or reaction product) of an epoxy based demulsifier and a heterocyclic compound, e.g. dimercaptoth-iadiazole, has been found to exhibit synergistic activity in marine oil formulations especially Trunk Piston Oils. The combination produces Trunk Piston Oils with improved water-shedding properties.

Abstract: A lubricating oil for refrigerating machines comprises polyoxyalkylene compounds represented by the formula (I): ##STR1## Wherein A is a residue obtained from a compound which has both a heterocyclic ring having an ether linkage therein and hydroxyl groups by eliminating the hydroxyl groups from the compound; R.sup.1 and R.sup.2 are each an alkylene group; R.sup.3 is an alkyl group; R.sup.4 is hydrogen atom or an alkyl group; a and b are each a positive integer and l, m, and n are each an integer of 0 or more; and a.multidot.1+b.multidot.m=2 to 100 and l+m+n=2 to 20; further,the polyoxyalkylene compounds have a hydroxyl value ranging from 0 to 30.0 mgKOH/g and satisfies the following formula (1)0.5<p/(p+q)<1.0 (1)wherein p is the number of butylene groups represented by R.sup.1 and R.sup.2, and q is the number of all alkylene groups excluding the butylene groups.

Abstract: A lubricating oil additive contains a partially etherified polyhydric alcohol which has at least two hydroxyl groups and at least one hydrocarbon group having a least one double bond bonded thereto through an ether linkage as an active component. The lubricating additive is added to a lube base oil to form a lubricating oil which imparts excellent wear resistance, scarcely corrodes metallic substances, scarcely swells rubbers or resins and scarcely forms sludge due to thermal oxidation. The lubricating oil is mixed with a refrigerant to give a working fluid suitable for refrigerant compressors of domestic refrigerators, automotive room air conditioners, refrigerators for industrial use and air conditioners.

Abstract: Water-based stamping lubricants are comprised of: (1) water; (2) a polyester that is water-soluble or readily emulsifiable made by reacting one or more dicarboxylic acids and a polyalkylene glycol; (3) one or more ethoxylated alkylalcohols; (4) the salt of a phosphate ester of an ethoxylated alkyl alcohol; (5) an alkanolamine.

Abstract: Lubricant or lubricant concentrate on mineral oil and/or synthetic oil basis having improved lubricating properties, in particular improved load bearing, sliding and corrosion inhibiting properties, which containsa) one or more mineral oils and/or synthetic oils as base oil andb) at least one tetravalent to octavalent alcohol having at least one quaternary carbon atom as well as at least one ether bond in its molecule and having a density d.sub.20 of at least 0,900, and an enthalpy H of at least 350 kcal/kg,c) at least one asymmetric, organometallic compound,d) at least one phosphor containing substance,e) at least one sulfur containing substance andf) further usual additives.

Abstract: The invention is a lubricant concentrate composition, use solution, and method of use. The lubricant includes amine compounds of the formula,R.sub.1 --O--R.sub.2 --NH.sub.2,R.sub.1 --O--R.sub.2 --NH--R.sub.3 --NH.sub.2,and mixtures thereofwherein R.sub.1 may be a linear C.sub.6 -C.sub.18 alkyl, R.sub.2 may be a linear or branched C.sub.1 -C.sub.8 alkyl, and R.sub.3 may be a linear C.sub.1 -C.sub.8 alkyl, and a corrosion inhibitor. The lubricant composition preferably includes a polycarboxylic acid as a corrosion inhibitor. The composition may also include a hydrotrope, stabilizer, and a surfactant to provide detergency to the composition upon dilution and use. The invention also includes a lubricant use solution resulting from dilution of this concentrate.

Abstract: Method of lubricating a rubbed surface with a gaseous phase lubricant including a monomer constituent dispersed in a carrier fluid, where the monomer constituent is capable of forming in situ a polymer film directly on rubbing surfaces but is not polymerized in the carrier fluid, such that wear and friction of the rubbed surface are effectively reduced.

Abstract: A lubricating oil for a fluorinated hydrocarbon-based refrigerant type compressor, said lubricating oil having a kinematic viscosity at 100.degree. C. being 15 to 30 cSt and comprising, as a base oil, at least one polyoxyalkylene glycol derivative represented by the following formula (I):R.sub.1 --O--?(PO)p(EO.sup.1)q!--(EO.sup.2)r--R.sub.2 (I)in which R.sub.1 is an alkyl group having 1 to 4 carbon atoms, R.sub.2 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, PO is an oxypropylene group, EO.sup.1 and EO.sup.2 are oxyethylene groups, p, q and r are average polymerization degrees of PO, EO.sup.1 and EO.sup.2, respectively, ?(PO)p(EO.sup.1)q! is a random copolymer group of PO and EO.sup.1, (EO.sup.2)r is a block polymer group of EO.sup.2, p/(p+q) is 0.70 to 0.95, and r/(p+q+r) is 0.03 to 0.30. A lubricating method and a working fluid composition for the fluorinated hydrocarbon-based refrigerant type compressor are also disclosed.

Abstract: The present invention provides a working fluid composition for a refrigerating machine obtained by mixing an ammonia refrigerant with a lubricating oil which is extremely excellent in solubility with the ammonia refrigerant, and a method for lubricating a refrigerating machine suitable for the use of the working fluid composition.The working fluid composition comprises a mixture of ammonia and one or more kinds of polyether compounds represented by the formula (I); the refrigerating machine is characterized by constituting a refrigerating cycle or a heat pump cycle through which the working fluid composition is circulated; and the method for lubricating a refrigerating compressor is characterized by lubricating the ammonia refrigerant compressor with the lubricating oil comprising one or more kinds of ether compounds represented by the formula (I)R.sub.1 --?--O--(PO).sub.m --(EO).sub.n --R.sub.2 !.sub.x (I)wherein R.sub.1 is a hydrocarbon group having 1 to 6 carbon atoms, R.sub.

Abstract: A polyether having the formulaRX[(C.sub.x H.sub.2x O).sub.n (C.sub.y H.sub.2y O).sub.p Z].sub.m(I)wherein:R is either an alkyl or alkyl phenyl group having from 7 to 30 carbon atoms,X is selected from O, S or N;x is an integer from 2 to 4;y is an integer from 6 to 30;Z is a hydrocarbyl group containing from 1 to 30 carbon atoms;m is 1 when X is O or S or m is 2 when X is N;n and p are such that the polyether contains between 1 and 40% by weight of (C.sub.y H.sub.2y O) units and between 40 and 80% by weight of (C.sub.x H.sub.2x O) units; and the molecular weight of the polyether is between 500 and 3,500. Lubricating oil compositions comprising such polyethers are disclosed. A method of preparing the polyethers is disclosed and comprises preparing a H-capped polyether, preparing an alkali-metal salt thereof and reacting said salt with an alkylating agent.