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EP0568349A1 - Compositions liquides contenant des esters d'acides carboxyliques - Google Patents

Compositions liquides contenant des esters d'acides carboxyliques Download PDF

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Publication number
EP0568349A1
EP0568349A1 EP93303330A EP93303330A EP0568349A1 EP 0568349 A1 EP0568349 A1 EP 0568349A1 EP 93303330 A EP93303330 A EP 93303330A EP 93303330 A EP93303330 A EP 93303330A EP 0568349 A1 EP0568349 A1 EP 0568349A1
Authority
EP
European Patent Office
Prior art keywords
neo
hydroxy compound
liquid composition
carbon atoms
hydroxyl groups
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93303330A
Other languages
German (de)
English (en)
Inventor
Scott Ted Jolley
Kirk Emerson Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lubrizol Corp
Original Assignee
Lubrizol Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lubrizol Corp filed Critical Lubrizol Corp
Publication of EP0568349A1 publication Critical patent/EP0568349A1/fr
Withdrawn legal-status Critical Current

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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
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    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/38—Esters of polyhydroxy compounds
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    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/42—Complex esters, i.e. compounds containing at least three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compound: monohydroxy compounds, polyhydroxy compounds, monocarboxylic acids, polycarboxylic acids and hydroxy carboxylic acids
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    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/38—Heterocyclic nitrogen compounds
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    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/32—Heterocyclic sulfur, selenium or tellurium compounds
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    • C10M2207/30—Complex esters, i.e. compounds containing at leasst three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compounds: monohydroxyl compounds, polyhydroxy xompounds, monocarboxylic acids, polycarboxylic acids or hydroxy carboxylic acids
    • C10M2207/301—Complex esters, i.e. compounds containing at leasst three esterified carboxyl groups and derived from the combination of at least three different types of the following five types of compounds: monohydroxyl compounds, polyhydroxy xompounds, monocarboxylic acids, polycarboxylic acids or hydroxy carboxylic acids used as base material
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    • C10M2207/34—Esters having a hydrocarbon substituent of thirty or more carbon atoms, e.g. substituted succinic acid derivatives
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/30—Refrigerators lubricants or compressors lubricants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/32—Wires, ropes or cables lubricants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/36—Release agents or mold release agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/38—Conveyors or chain belts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/40—Generators or electric motors in oil or gas winning field
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/42—Flashing oils or marking oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/44—Super vacuum or supercritical use
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/50—Medical uses

Definitions

  • This invention relates to liquid compositions comprising at least one fluorine-containing hydrocarbon, and at least one lubricant. More particularly, the invention relates to liquid compositions useful as refrigeration liquids.
  • CFCs chlorofluorocarbons
  • CFC-13 which is chlorotrifluoromethane
  • CFC-12 which is dichlorodifluoromethane
  • CFC-113 which is 1,2,2-trifluoro-1,1,2-trichloroethane.
  • halogenated hydrocarbons containing at least some hydrogen atoms such as HCFC-22 which is difluorochloromethane, HCFC-123 which is 1,1-dichloro-2,2,2-trifluoroethane, HFC-134a which is 1,1,1,2-tetrafluoroethane and HCFC-141b which is 1,1-dichloro-1-fluoroethane.
  • the ozone depletion potential of these proposed substitutes is significantly less than the ozone depletion potential of the previously used CFCs.
  • the ozone depletion potential is a relative measure of the capability of the material to destroy the ozone layer in the atmosphere.
  • HCFC-22 and HFC-134a generally are recommended as being candidates in refrigerant applications, and HFC-134a is particularly attractive because its ozone depletion potential has been reported as being zero.
  • any of the replacement materials In order for any of the replacement materials to be useful as refrigerants, the materials must be compatible with the lubricant utilized in the compressor.
  • the presently used refrigerants such as CFC-12 are readily compatible with mineral lubricating oils which are utilized as the lubricant in air-conditioner compressors.
  • the above-described refrigerant candidates have different solubility characteristics than the refrigerants presently in use.
  • mineral lubricating oil is incompatible (i.e., insoluble) with HFC-134a.
  • Such incompatibility results in unacceptable compressor life in compression-type refrigeration equipment including refrigerators and air-conditioners including auto, home, commercial and industrial air-conditioners.
  • the mixture of refrigerant and lubricant In order to perform as a satisfactory refrigeration liquid, the mixture of refrigerant and lubricant must be compatible and stable over a wide temperature range such as from about 0°C and above 80°C.
  • the lubricants it is generally desirable for the lubricants to be soluble in the refrigerant at concentrations corresponding to the ratios customary in the environment of use, e.g. about 5% to 15%, over a temperature range from -30°, or preferably -40°C, or below, to 80°C or above.
  • the refrigeration liquids In addition to thermal stability, the refrigeration liquids must have acceptable viscosity characteristics which are retained even at high temperatures, and the refrigeration liquid should not have a detrimental effect on materials used as seals in the compressors.
  • compositions comprising a tetrafluoroethane and polyoxyalkylene glycols are discussed in U.S. Patent 4,755,316.
  • the compositions are useful in refrigeration systems.
  • Refrigeration oils are described in U.S. Patents 4,248,726 and 4,267,064 which comprise mixtures of a polyglycol and 0.1 to 10% of glycidyl ether type epoxy compounds, or epoxidized fatty acid monoesters, and optionally, epoxidized vegetable oil.
  • the lubricating oils are reported to be useful in refrigerators using a halogen-containing refrigerant such as Freons 11, 12, 13, 22, 113, 114, 500 and 502 (available from DuPont), and in particular with Freon 12 or 22.
  • U.S. Patent 4,431,557 describes fluid compositions comprised of a fluoro- and chloro-containing refrigerant, a hydrocarbon oil, and an alkylene oxide additive compound which improves the thermal resistance of the oil in the presence of the refrigerant.
  • hydrocarbon oils include mineral oil, alkyl benzene oil, dibasic acid ester oil, polyglycols, etc.
  • the composition may contain other additives including load-carrying additives such as phosphorus acid esters, phosphoric acid esters, etc.
  • fluorocarbon refrigerants include R-11, R-12, R-113, R-114, R-500, etc.
  • U.S. Patent 4,428,854 describes absorption refrigerant compositions for use in refrigeration systems comprising 1,1,1,2-tetrafluoroethane and an organic solvent capable of dissolving the ethane.
  • the solvents disclosed are organic amides, acetonitrile, N-methyl pyrroles, N-methyl pyrrolidine, N-methyl-2-pyrrolidone, nitromethane, various dioxane derivatives, glycol ethers, butyl formate, butyl acetate, diethyl oxalate, diethyl malonate, acetone, methyl ethyl ketone, other ketones and aldehydes, triethyl phosphoric triamide, triethylene phosphate, triethyl phosphate, etc.
  • Stabilized absorption compositions comprising (a) a halogenated hydrocarbon refrigerant, (b) a liquid absorbent of a polyethylene glycol methyl ether, and (c) at least one stabilizer are described in U.S. Patent 4,454,052.
  • stabilizers include phosphate esters, epoxy compounds, and organotin compounds.
  • the polyethylene glycol methyl ether-type compounds are of the general formula CH3-O-(CH2H4O) n R wherein n is an integer of 1 to 6, and R is H, CH3- or CH3CO-.
  • a variety of halogenated hydrocarbons are described including 1,1-difluoromethane, 1,1,1,2-tetrafluoroethane, etc.
  • U.S. Patent 4,559,154 relates to absorption heat pumps utilizing as working fluid, a saturated fluorohydrocarbon or fluorohydrocarbon ether having from 3 to 5 carbon atoms.
  • Solvents reported to be useful with such fluorohydrocarbons include ethers such as tetraglyme, amides which can be lactams such as the N-alkyl pyrrolidones, sulfonamides and ureas including cyclic ureas.
  • a liquid composition comprising (A) at least one fluorine-containing hydrocarbon containing one to three carbon atoms; and (B) at least one carboxylic ester of (I) a neo hydroxy compound selected from the group consisting of (i) a neo hydroxy compound with two or three hydroxyl groups; (ii) a mixture of neo hydroxy compounds having an average of less than about 3.5 hydroxyl groups per hydroxy compound, (iii) a neo hydroxy compound having five or more hydroxyl groups per hydroxy compound, and (iv) a mixture of neo hydroxy compounds having an average greater than 4.5 hydroxyl groups per hydroxy compound, and (II) a combination of (a) a monocarboxylic acylating agent having four or five carbon atoms and (b) a monocarboxylic acylating agent having from about 7 to about 15 carbon atoms, provided that when (I) is (i)
  • liquid composition comprising:
  • liquid composition comprising:
  • liquid composition comprising: (A) at least one fluorine-containing hydrocarbon containing 1 to 3 carbon atoms; (B) at least one carboxylic ester of
  • Liquid compositions also are described wherein the fluorine-containing hydrocarbons also contain other halogens such as chlorine. Methods of lubricating refrigeration systems are also described.
  • the liquid compositions are useful particularly as refrigeration liquids in refrigerators and air conditioners including automotive, home, commercial, and industrial air-conditioners.
  • the carboxylic esters derived from neo hydroxy compounds (i) and (ii), especially (i), have low viscosities, such as around 10-20 cSt at 40°C, while having excellent solubility.
  • the esters derived from (iii) and (iv), especially (iii), have high viscosities, such as around 150-350 cSt at 40°C.
  • hydrocarbyl and “hydrocarbylene” denote a group having a carbon atom directly attached to the polar group and having a hydrocarbon or predominantly hydrocarbon character within the context of this invention.
  • hydrocarbylene denote a group having a carbon atom directly attached to the polar group and having a hydrocarbon or predominantly hydrocarbon character within the context of this invention.
  • groups include the following:
  • hydrocarbon-based also has the same meaning and can be used interchangeably with the term hydrocarbyl when referring to molecular groups having a carbon atom attached directly to the polar group.
  • lower as used herein in conjunction with terms such as hydrocarbyl, hydrocarbylene, alkylene, alkyl, alkenyl, alkoxy, and the like, is intended to describe such groups which contain a total of up to 7 carbon atoms, per se, and include methyl, ethyl, propyl, butyl, pentyl, hexyl and heptyl groups.
  • Viscosity is kinematic viscosity and is measured by ASTM D-2270.
  • equivalent weight of polyol is determined by dividing the formula weight of the polyol by the number of hydroxyl groups. Equivalents of polyol is determined by dividing the amount of polyol by its equivalent weight.
  • the equivalent weight is determined by dividing the formula weight of the acylating agent or anhydride by the number of carboxylic groups which form esters.
  • an anhydride contributes two carboxyl groups which can form ester. Therefore, the equivalent weight of anhydride, such as succinic anhydride, would be the formula weight of the anhydride divided by the number of carboxyl group.
  • succinic anhydride the number is two.
  • an excess of acylating agent i.e., more than a single equivalent, may be used.
  • a compound or component When a compound or component is indicated herein as being “soluble”, the compound or component is soluble in the liquid compositions of the invention comprising the fluorine-containing hydrocarbon and the lubricant.
  • a compound or component is considered “soluble” so long as it is soluble in the liquid compositions, even though it may be insoluble in the fluorine-containing hydrocarbon per se.
  • compositions that include the ingredients listed in the claim as well as other ingredients that do not materially affect the basic and novel characteristics of the liquid compositions.
  • the liquid compositions of the present invention comprise at least one fluorine-containing hydrocarbon. That is, the fluorine-containing hydrocarbons contain at least one C-H bond as well as C-F bonds. In addition to these two essential types of bonds, the hydrocarbon also may contain other carbon-halogen bonds such as C-Cl bonds. Because the liquid compositions of the present invention are primarily intended for use as refrigerants, the fluorine-containing hydrocarbon preferably contains one to three, or to two carbon atoms, and more preferably two carbon atoms.
  • the fluorine-containing hydrocarbons useful in the liquid compositions of the present invention may contain other halogens such as chlorine.
  • the hydrocarbon contains only carbon, hydrogen and fluorine. These compounds containing only carbon, hydrogen and fluorine are referred to herein as fluorohydrocarbons or hydrofluorocarbons.
  • fluorohydrocarbons or hydrofluorocarbons are referred to herein as fluorohydrocarbons or hydrofluorocarbons.
  • the hydrocarbons containing chlorine as well as fluorine and hydrogen are referred to as chlorofluorohydrocarbons or hydrochlorofluorocarbons.
  • fluorine-containing hydrocarbons which may be useful in the liquid compositions of the present invention include trifluoromethane (HFC-23), 1,1,1-trifluoroethane (HFC-143a), 1,1-difluoroethane (HFC-152a), 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124), 1-chloro-1,1,2,2-tetrafluoroethane (HCFC-124a), 1-chloro-1,1-difluoroethane (HCFC-142b), and 1,1,2,2-tetrafluoroethane (HFC-134).
  • refrigerants such as perfluoropropane (HFC-218), perfluorocyclopropane (HFC-216), perfluoropropylene oxide, 1,3-perfluoro propylene oxide and pentafluorodimethyl ether may also be used with the lubricant.
  • fluorohydrocarbons are often identified merely with the prefix "R” in place of the above letters.
  • HFC-23 is R-23
  • HCFC-124 is R-124, etc.
  • fluorine-containing hydrocarbons which are useful as refrigerants are fluoromethanes and fluoroethanes boiling at a relatively low temperature at atmospheric pressure, e.g., below 30°C. Mixtures of fluorine-containing hydrocarbons may be used, and the amount of each fluorohydrocarbon in the mixture may be varied as desired.
  • fluorohydrocarbon mixtures useful as (A) include: 142(b)/22; 134(a)/23; 22/124/152(a), etc.
  • the useful fluorocarbon refrigerants serve to transfer heat in a refrigeration system by evaporating and absorbing heat at a low temperature and pressure, and by releasing heat on condensing at a higher temperature and pressure.
  • the amount of fluorine-containing hydrocarbon is the level typically used for the refrigeration system.
  • the liquid compositions of the present invention generally contain from about 10%, or about 20% up to about 90%, or to about 85% of the fluorine-containing hydrocarbon.
  • the fluorine-containing hydrocarbon is present in an amount from about 45%, or about 50%, or about 55% up to about 90%, or to about 80%, or to about 75% by weight of the liquid composition.
  • the liquid compositions will comprise from about 50% to about 99% by weight of the fluorine-containing hydrocarbon.
  • the liquid compositions contain from about 70% to about 99% by weight of the fluorine-containing hydrocarbon.
  • the fluorine-containing hydrocarbon is present in an amount from about 10%, or about 25%, or about 30% up to about 55%, or to about 50%, or to about 45% by weight of the lubricant.
  • the fluorine-containing hydrocarbon is present in an amount less than about 45%, then the liquid compositions are generally suited for household refrigeration systems.
  • the carboxylic ester utilized as component (B) in the liquid compositions of the present invention are reaction products of (I) a neo hydroxy compound and (II) one or more carboxylic acylating agents, e.g. acids, anhydrides, or the lower esters thereof such as methyl, ethyl, etc.).
  • carboxylic acylating agents e.g. acids, anhydrides, or the lower esters thereof such as methyl, ethyl, etc.
  • the neo hydroxy compound are selected from the group consisting of (i) a neo hydroxy compound with two or three hydroxyl groups, (ii) a mixture of neo hydroxy compounds having an average of less than about 3.5 hydroxyl groups per hydroxy compound, (iii) a neo hydroxy compound having five or more hydroxyl groups per hydroxy compound, and (iv) a mixture of neo hydroxy compounds having an average of greater than 4.5 hydroxyl groups per hydroxy compound.
  • Esters may be prepared from any hydroxy compound, such as a polyhydroxy compound. These hydroxy compounds include glycols and triols, such as butanediol, hexanediol, glycerol, butanetriol, and hexanetriol. However, the inventor has discovered that esters derived from neo alcohols provide beneficial properties to the liquid compositions of this invention.
  • the neo hydroxy compound (i) contains two or three hydroxyl groups, preferably three hydroxyl groups.
  • These hydroxy compounds include glycols and triols, such as neopentyl glycol, and preferably trimethylolalkanes. Trimethylolalkanes include trimethylolmethane, trimethylolethane, trimethylolpropane and trimethylolbutane. A preferred trimethylolalkane is trimethylolpropane.
  • the neo hydroxy compound is a mixture of neo hydroxy compounds having an average of less than 3.5 hydroxyl groups per hydroxy compound.
  • the average number of hydroxyl groups per compound is determined by dividing the total number of hydroxyl groups in the mixture by the total number of hydroxy compound in the mixture. For instance, a (50:50) molar mixture of trimethylolpropane and neopentyl glycol has 2.5 hydroxyl groups per hydroxy compound.
  • a (75:25) molar mixture of trimethylolbutane and neopentylglycol has an average of 2.75 hydroxyl groups per hydroxy compound.
  • any mixture of neo hydroxy compounds may be used provided that the resultant esters are soluble in the liquid compositions of the present invention.
  • the mixture is prepared from neo hydroxy compound having from two to about four, preferably to about three hydroxyl groups per hydroxy compound.
  • neo hydroxy compound which may be used to form the mixture (ii) include pentaerythritol, neopentylglycol, and trimethylolalkanes, as described above.
  • Example of molar mixtures of neo hydroxy compound includes trimethylolpropane and pentaerythritol (80:20), trimethylolpropane and trimethylolethane (50:50), and trimethylolbutane and hexanetriol (50:50).
  • the neo hydroxy compound is (iii) neo hydroxy compound having five or more hydroxyl groups per hydroxy compound.
  • These neo hydroxy compounds generally contain from about 5, or about 6 up to about 12, or to about 10, or to about 8 hydroxyl groups per hydroxy compound. Examples of these compounds include dipentaerythritol, tripentaerythritol, and di-trimethylolpropane.
  • esters may be prepared form triglycerol.
  • the neo hydroxy compound is (iv) a mixture of neo hydroxy compound having an average of greater than 4.5 hydroxyl groups per hydroxy compound. The determination of this average is the same as described for mixture (ii) above.
  • Examples of (iv) include dipentaerythritol and tripentaerythritol (75:25), trimethylolpropane and dipentaerythritol (80:20), neopentylglycol and tripentaerythritol (20:80), pentaerythritol and tripentaerythritol (75:25), and pentaerythritol and dipentaerythritol (60:40).
  • the above neo hydroxy compounds are reacted with (II) a combination of (a) a monocarboxylic acylating agent having four or five carbon atoms and (b) a monocarboxylic acylating agent having from about 7 to about 15 carbon atoms, provided that when (I) is (i) or (ii) then greater than 55%, or greater than 57%, or greater than 59% of the ester groups are derived from (IIa), and provided that when (I) is (iii) or (iv) then greater than 55% of the ester groups are derived from (IIb).
  • the monocarboxylic acylating agents are preferably aliphatic acylating agents.
  • monocarboxylic acylating agents are linear or branched.
  • the branched acylating agents may be methyl-branched acylating agents, which are generally referred to as "iso" acylating agents.
  • the acylating agents may also be alpha-,alpha-, disubstituted acylating agents, or "neo" acylating agents.
  • the monocarboxylic acylating agent (IIa) may be isobutyric, valeric, 2-methylbutyric, or neopentanoic acid or anhydride.
  • Isopentanoic acid commercially available from Union Carbide, is a mixture of valeric acid and 2-methyl-butanoic acid with an approximate weight ratio of (66:34).
  • the monocarboxylic acylating agent may be neo pentanoic acid, available from Exxon Chemical Company.
  • the monocarboxylic acylating agent (IIb) generally contains from about 7, or about 8 up to about 15, or to about 12, or to about 10 carbon atoms. Like monocarboxylic acylating agents (IIa), monocarboxylic acylating agents (IIb) may be linear or branched, including "iso" and “neo" branched acylating agents.
  • acylating agents include n-octanoic acid, neoheptanoic acid, neodecanoic acid, 2,2,4-trimethylpentanoic acid, 2-hexyldecanoic acid, isostearic acid, 2-methylhexanoic acid, 3,5,5-trimethylhexanoic acid, 2-ethylhexanoic acid, 2,2,4-trimethylpentanoic acid, isononanoic acid, isoheptanoic acid, isodecanoic acid, neoheptanoic acid, neodecanoic acid, and ISO Acids and NEO Acids available from Exxon Chemical Company, Houston, Texas USA.
  • ISO Acids are isomer mixtures of branched acids and include commercial mixtures such as ISO Heptanoic Acid, ISO Octanoic Acid, and ISO Nonanoic Acid, as well as developmental products such as ISO Decanoic Acids and ISO 810 Acid. Of the ISO Acids, ISO Octanoic acid and ISO Nonanoic acid are preferred.
  • Neo acids include commercially available mixtures such as NEO Pentanoic Acid, NEO Heptanoic Acid, and NEO Decanoic Acid, as well as developmental products such as ECR-909 (NEO C9) Acid, and ECR-903 (NEO C1214) Acid and commercial mixtures of branched chain carboxylic acids such as the mixture identified as NEO 1214 acid from Exxon.
  • the carboxylic esters of the liquid compositions are prepared by reacting at least one carboxylic acylating agent with at least one neo hydroxy compound.
  • the formation of esters by the interaction of carboxylic acylating agents and alcohols is acid catalyzed and is a reversible process which can be made to proceed to completion by use of a large amount of alcohol or carboxylic acylating agent, or by removal of the water as it is formed in the reaction. If the ester is formed by transesterification of a lower molecular weight carboxylic ester, the reaction can be forced to completion by removal of the low molecular weight alcohol or acid formed as a result of a transesterification reaction.
  • the esterification reaction can be catalyzed by either organic acids or inorganic acids.
  • inorganic acids include sulfuric acids and acidified clays.
  • organic acids can be utilized including paratoluenesulfonic acid, and acidic resins such as Amberlyst 15, etc.
  • Organometallic catalysts include, for example, tetraisopropoxy orthotitanate.
  • a reaction vessel is charged with 2145 parts (16 moles) of trimethylolpropane and 2305 parts (16 moles) of 2,2,4-trimethylpentanoic acid. The mixture is heated to 150°C and the temperature is maintained for 2-1/2 hours. Distillate (260 ml.) is collected. The reaction mixture is cooled to 145°C where 3098 parts (35.2 moles) of isobutyric acid is added to the reaction vessel over 1-1/2 hours. The reaction mixture cools to 100°C after the addition of the isobutyric acid. SE-100 aromatic solvent, commercially available from Ohio Solvents (100 ml.), is added to the reaction vessel. The reaction mixture is heated to 145°C and the temperature is maintained for 17 hours.
  • the reaction mixture is vacuum stripped at 145°C, 20 mm Hg for 18 hours.
  • the neutralization acid number of the residue after vacuum stripping is 0.15.
  • the reaction mixture is vacuum stripped for an additional 4 hours and the residue is filtered through a mixture of diatomaceous earth and aluminum oxide.
  • the filtrate has a kinematic viscosity of 13.82 at 40°C and 3.1 at 100°C.
  • the residue has a 0.03 total acid number.
  • a reaction vessel is charged with 3082 (69 equivalents) of trimethylolpropane, 3312 (23 equivalents) of 2,2,4-trimethylpentanoic acid, 3634 (46 equivalents) of isobutyric anhydride and 10 parts (0.1 equivalent) of methanesulfonic acid.
  • the reaction mixture is heated under nitrogen to 115°C.
  • the temperature is maintained between 115°C to 150°C for 6 hours.
  • the reaction temperature is maintained at 150°C for 10 hours while 798 milliliters of distillate is collected.
  • the mixture is heated to 200°C and held for 8 hours while 32 milliliters of distillate is collected.
  • the total distillate collected is 860 milliliters.
  • the mixture is cooled to 130°C where 350 parts (4.4 equivalents) of isobutyric anhydride are added to the reaction vessel.
  • the mixture is stirred at 130°C for 24 hours.
  • the reaction mixture is vacuum stripped at 8-10 mm Hg and 120-150°C for 8 hours.
  • the acid number after the stripping was 4.2.
  • the reaction mixture is stripped to 190°C and 8-10 mm Hg for 6 hours.
  • the acid number after this stage of stripping is 0.84.
  • the residue is vacuum stripped for 8 hours at 195°C and 10 mm Hg.
  • the acid number after this stage of stripping is 0.051.
  • the residue of the product has a kinematic viscosity of 14.0 centistokes at 40°C and 3.1 centistokes at 100°C.
  • the acid number of the product is 0.05.
  • a reaction vessel is charged with 1139 parts (8.5 moles) of trimethylolpropane, 1224 parts (8.5 moles) of 2,2,4-trimethylpentanoic acid, and 6 parts of methanesulfonic acid.
  • the mixture is heated under nitrogen to 117°C and the temperature is maintained for 3 hours while a total of 90 milliliters of water is collected.
  • the mixture is then heated to 150°C and the temperature is maintained for 5 hours.
  • the total water collected was 153 milliliters.
  • Isobutyric acid 1496 parts, 17 moles) is added to the reaction mixture.
  • the mixture is heated to 120°C and a temperature is maintained between 120°C and 125°C for 19 hours.
  • the acid number of the reaction mixture is 41.
  • the reaction mixture is heated to 145°C and the temperature is maintained for 22 hours.
  • the acid number of the reaction mixture is 24.
  • An additional charge is isobutyric acid (200 parts, 2.27 moles) is added to the reaction mixture.
  • the mixture is heated to 145°C and the temperature is maintained for 22 hours.
  • the reaction mixture is vacuum stripped to 125°C and 20-25 mm Hg for 3 hours.
  • the residue is then subjected to additional vacuum stripping at 150°C and 10 mm Hg for 3 hours.
  • the reaction mixture is then vacuum stripped to 165-175°C and 8-10 mm Hg for 5 hours.
  • the neutralization acid number 2-phenolphthalein of the residue is 0.29.
  • the residue is vacuum stripped at 175°C and 8-10 mm Hg for 6 hours.
  • the neutralization acid number is 0.16.
  • the residue is filtered through a 3/4" pad of aluminum oxide.
  • the filtrate has a acid number of 0.11 and a kinematic viscosity of 14.67 (at 40°C) and 3.23 (at 100°C) .
  • a reaction vessel is charged with 660 parts (5.5 moles) of trimethylolethane, 1122 parts (11.0 moles) of neopentanoic acid, 869 parts (5.5 moles) of isononanoic acid, and 3 parts of tetraisopropoxy titanate.
  • the mixture was heated to 220°C for 72 hours while water is removed.
  • the reaction mixture is stripped for 8 hours at 180-200°C.
  • the residue is treated with 200 parts of alumina and filtered through cloth and diatomaceous earth.
  • the filtrate is the desired product and has a kinematic viscosity of 23.6 centistokes (at 40°C) and 4.0 centistokes (at 100°C).
  • the filtrate has a acid number of 0.08.
  • a reaction vessel is charged with 603 parts (4.5 moles) of trimethylolpropane, 441 parts (3 moles) of 2,2,4-trimethylpentanoic acid, 1065 parts of isopentanoic acid a mixture of valeric acid and 2-methylbutyric acid having a weight ratio of (66:34) and available commercially from Union Carbide), and 4 parts of methanesulfonic acid.
  • the reaction mixture is heated to 150°C and the temperature is maintained for six hours. Water is collected azeotropically (220 milliliters). The reaction temperature is maintained for an additional 31 hours where an additional 10 milliliters of water is collected.
  • the reaction mixtue is vacuum stripped to 150°C and 20 mm Hg for 18 hours.
  • the neutralization acid number of the residue is 0.12.
  • the residue is filtered through alumina and diatomaceous earth. The filtrate is the desired product.
  • a reaction vessel is charged with 2286 parts (9.0 moles) of dipentaerythritol, 1422 parts (9 moles) of isononanoic acid, 1836 parts (18 moles) of neopentanoic acid, and 8 parts of methanesulfonic acid.
  • the reaction is heated to 140°C and the temperature is maintained for 18 hours. Water is collected (460 milliliters) by distillation.
  • An additional charge of isononanoic acid (4266 parts, 27 moles) is added to the reaction vessel.
  • the reaction is heated to 200°C and the temperature is maintained for 18 hours.
  • the reaction is vacuum stripped to 200°C and 10 mm Hg. After 15 hours of stripping the acid number was 0.2.
  • the residue was treated with alumina (800 parts) and the mixture is heated to 110°C and the temperature is maintained for 4 hours.
  • the product is filtered and the filtrate is the desired product.
  • the filtrate has a kinematic viscosity of 720 centistokes at 40°C and 30.5 centistokes (at 100°C).
  • a reaction vessel is charged with 166 parts (1.22 moles) of pentaerythritol, 151 parts (0.4 moles) of tripentaerythritol, 439 parts (2.7 moles) of isononanoic acid, 391 parts (2.7 moles) of 2,2,4-trimethylpentanoic acid, 214 parts (1.35 moles) of isobutyric anhydride, and 4 parts of tetra-isopropoxy titanate.
  • the reaction mixture is heated to 170°C and the temperature is maintained for 24 hours. Water is collected by distillation (130 milliliters). The reaction is vacuum stripped for 3 hours at 170°C and 1 mm Hg.
  • the product is filtered and the residue has a kinematic viscosity of 133.8 centistokes (at 40°C) and 13.27 centistokes (at 100°C).
  • the acid number of the product is 0.1.
  • a reaction vessel is charged with 192 parts (1.41 moles) of pentaerythritol, 242 parts (0.95 moles) of dipentaerythritol, 1337 parts (8.46 moles) of isononanoic acid, 406 parts (2.82 moles) of 2,2,4-trimethylpentanoic acid, and 3 parts of tetraisopropoxy titanate.
  • the reaction mixture is heated to 210°C and the temperature is maintained for 30 hours while water is removed.
  • the reaction mixture is vacuum stripped to 210°C and 10 mm Hg.
  • the residue is treated with alumina and filtered.
  • the filtrate is the desired product and has a kinematic viscosity of 171.7 centistokes (at 40°C) and 15.4 centistokes (at 100°C).
  • a reaction vessel is charged with 374 parts (2.75 moles) of pentaerythritol, 465 parts (1.83 moles) of dipentaerythritol, 3042 parts (19.25 moles) of isononanoic acid, 217 parts (1.37 moles) of isobutyric anhydride, and 4 parts of methanesulfonic acid.
  • the reaction mixture is heated to 130°C and the temperature is maintained for 24 hours, while 360 milliliters of water is collected.
  • An additional charge of isobutyric anhydride (20 grams) is added to the reaction mixture at 100°C.
  • the reaction mixture is heated to 190°C and blown with nitrogen at 2 standard cubic feet per hour for 6 hours.
  • the product is vacuum stripped for 24 hours at 200°C and 10 mm Hg. After 16 hours of vacuum stripping the acid number is 0.15. After 24 hours of vacuum stripping the acid number is 0.1.
  • the residue is treated with alumina (300 parts) at 120°C.
  • the acid number after alumina treatment is 0.05.
  • the mixture is filtered through a pad of alumina and diatomaceous earth. The filtrate is the desired product and has a kinematic viscosity of 182 centistokes (at 40°C) and 15.6 centistokes (at 100°C).
  • the filtrate has a acid number of 0.05.
  • the esters (B) preferably contain branched alkyl groups and generally are free of acetylenic and aromatic unsaturation.
  • the soluble lubricants of this invention also are preferably free of olefinic unsaturation except that some olefinic unsaturation may be present so long as the lubricant is soluble.
  • the carboxylic esters (B) are soluble in the fluorine-containing hydrocarbons and, in particular, in the fluorohydrocarbons such as 1,1,1,2-tetrafluoroethane.
  • the lubricants are soluble over a wide temperature range and, in particular, at low temperatures.
  • the solubility of the lubricants in fluorohydrocarbons such as 1,1,1,2-tetrafluoroethane at low temperatures is determined in the following manner.
  • the lubricant (0.5 gram) is placed in a thick-walled glass vessel equipped with a removable pressure gauge.
  • the liquid compositions may additionally contain (C) at least one additive selected from the group consisting of an alkyl phosphite, an alkyl phosphonic acid ester, a nitrogen-containing heterocycle, and a mixture thereof.
  • the phosphite and/or the alkyl phosphonic acid ester are present in an amount sufficient to provide antiwear and /or extreme pressure properties to the lubricant and liquid composition.
  • the phosphite and/or the alkyl phosphonic acid ester are present in an amount to provide 0.001%, or to 0.015%, or about 0.025%, to about 1%, or to about 0.5%, or to about 0.2% by weight phosphorus to the lubricant.
  • the nitrogen-containing heterocycle is present in an amount from about 0.001%, or about 0.02%, or about 0.03% up to about 5%, or to about 2%, or to about 1%, or to about 0.5% by weight of the lubricant.
  • the phosphite and/or the alkyl phosphonic acid ester provide beneficial antiwear and extreme pressure properties to the liquid compositions.
  • the phosphite may be a dialkyl or trialkyl phosphite, preferably a dialkyl phosphite.
  • the alkyl phosphonic acid ester may be an alkyl phosphonic acid diester, preferably a dialkylester.
  • the alkyl groups of the phosphite and the phosphonic acid ester independently contain from 1, or about 3 to about 20, or to about 18, or to about 8 carbon atoms. In one embodiment, the phosphite and the phosphonic acid ester have alkyl groups independently containing from about 3 to about 6, or to about 5 carbon atoms.
  • dialkyl phosphites are commercially available, such as lower dialkyl phosphites, which are preferred.
  • Lower dialkyl phosphites include dimethyl, diethyl, dipropyl, dibutyl, dipentyl and dihexyl phosphites.
  • Phosphites and their preparation are known and many phosphites are available commercially.
  • mixed alkyl phosphites, made from a mixture of alcohols are useful in the present invention. Examples of mixtures of alcohols include ethyl and butyl alcohol; propyl and pentyl alcohol; and methyl and pentyl alcohol.
  • a particularly useful phosphite is dibutyl phosphite.
  • Alkyl phosphonic acid esters are prepared by means known to those in the art.
  • alkyl phosphonic acid esters may be prepared by reacting an alkyl halide with a trialkyl phosphite.
  • alkyl phosphonic acid esters include diethyl, butylphosphonate; dibutyl,butylphosphonate; 2-ethylhexyl,2-ethylhexylphosphonate, etc.
  • the lubricant may additionally contain a nitrogen-containing heterocycle, such as dimercaptothiadiazoles, triazoles, amino-mercaptothiadiazoles, imidazoles, thiazoles, tetrazoles, hydroxyquinolines, oxazolines, imidazolines, thiophenes, indoles, indazoles, quinolines, benzoxazines, dithiols, oxazoles, oxatriazoles, pyridines, piperazines, triazines, and derivatives of any one or more thereof.
  • a nitrogen-containing heterocycle such as dimercaptothiadiazoles, triazoles, amino-mercaptothiadiazoles, imidazoles, thiazoles, tetrazoles, hydroxyquinolines, oxazolines, imidazolines, thiophenes, indoles, indazoles, quinolines, benzoxazines, dithiols,
  • the nitrogen containing heterocycle is a triazole or derivative thereof, a thiazole or derivative thereof, a mercaptothiazole or derivative thereof and a thiadiazole or derivative thereof, preferably a triazole or derivative thereof.
  • These additives provide metal deactivating, metal passivating and corrosion controlling character to the liquid compositions.
  • useful metal deactivators include dimercaptothiadiazoles and derivatives thereof, substituted and unsubstituted triazoles (e.g., benzotriazole, tolyltriazole, octylbenzotriazole, and the like), mercaptobenzothiazoles, etc.
  • the triazole is a benzotriazole or an alkylbenzotriazole in which the alkyl group contains 1 to about 20 carbon atoms, preferably 1 to about 8 carbon atoms.
  • the nitrogen containing heterocycle (C) may also be the reaction product of at least one of the above triazoles, at least one amine and an aldehyde or aldehyde precursor.
  • the triazole is preferably a benzotriazole.
  • the amine can be one or more mono- or polyamines. These monoamines and polyamines can be primary amines, secondary amines or tertiary amines. Examples of polyamines include polyalkylenepolyamines, and heterocyclic polyamines. Polyalkylenepolyamines include polyethylenepolyamines, such as diethylenetriamine, triethylenetriamine, tetraethylenepentaamine, etc.
  • the aldehyde is typically a hydrocarbon-based aldehyde, preferably a lower aliphatic aldehyde.
  • Suitable aldehydes include formaldehyde, benzaldehyde, acetalde-hyde, the butyraldehydes, hydroxybutyraldehydes and heptanals, as well as aldehyde precursors which react as aldehydes under the conditions of the reaction such as paraformaldehyde, paraldehyde, formalin and methanal.
  • Formaldehyde and its precursors e.g., paraformaldehyde, trioxane
  • Mixtures of aldehydes may be used.
  • Reomet® 39 An example of a useful triazole derivative is Reomet® 39. This material is a triazole derivative available commercially from Ciba-Geigy Corp.
  • the liquid compositions of the present invention are characterized as having improved thermal and chemical stability over a wide temperature range.
  • the liquid compositions with (C) phosphites, alkylphosphonates, or nitrogen-containing heterocycles have improved antiwear and corrosion stability properties.
  • the liquid compositions have beneficial viscosity properties.
  • Preferably the liquid compositions have a viscosity of 5-400 centistokes (cSt) measured at 40°C.
  • the liquid composition may contain one carboxylic ester reaction product or in another embodiment, the liquid compositions may contain a blend of two or more carboxylic ester reaction products.
  • a liquid composition of a desired viscosity may be prepared by blending a higher viscosity carboxylic ester with a lower viscosity carboxylic ester.
  • Other additives, if soluble in the liquid, known to be useful for improving the properties of halogen-containing hydrocarbon refrigerants can be included in the liquid compositions of the present invention to improve the characteristics of the liquid as a refrigerant.
  • hydrocarbon oils such as mineral oil generally are not included in and are most often excluded from the liquid compositions of the invention, particularly when the fluorine-containing hydrocarbon contains no other halogens. Hydrocarbon lubricants, however, may be present if the liquid compositions are used to retrofit a compressor system which had previously used a hydrocarbon lubricant.
  • additives may be included in the liquid compositions of the present invention to enhance the performance of the liquids include extreme-pressure and anti-wear agents, oxidation and thermal-stability improvers, corrosion-inhibitors, viscosity-index improvers, pour point and/or floc point depressants, detergents, dispersants, anti-foaming agents, viscosity adjusters, metal deactivators, etc. As noted above, these supplementary additives must be soluble in the liquid compositions of the invention.
  • phosphates include phosphates, phosphate esters, thiophosphates such as zinc diorganodithiophosphates, chlorinated waxes, sulfurized fats and olefins, organic lead compounds, fatty acids, molybdenum complexes, borates, halogen-substituted phosphorous compounds, sulfurized Diels Alder adducts, organic sulfides, metal salts of organic acids, etc.
  • Sterically hindered phenols, aromatic amines, dithiophosphates, sulfides and metal salts of dithioacids are useful examples of oxidation and thermal stability improvers.
  • VI improvers include polyolefins such as polyesterbutene, polymethacrylate, polyalkyl styrenes, etc.
  • Pour point and floc point depressants include polymethacrylates, ethylene- vinyl acetate copolymers, succinamic acid-olefin copolymers, ethylene-alpha olefin copolymers, etc.
  • Detergents include sulfonates, long-chain alkyl-substituted aromatic sulfonic acids, phenylates, metal salts of alkyl phenols, alkyl phenol-aldehyde condensation products, metal salts of substituted salicylates, etc.
  • Silicone polymers are a well known type of anti- foam agent. Viscosity adjusters are exemplified by polyisobutylene, polymethacrylates, polyalkyl styrenes, naphthenic oils, alkyl benzene oils, polyesters, polyvinyl chloride, polyphosphates, etc.
  • liquid compositions of the present invention are particularly useful as refrigerants in various refrigeration systems which are compression-type systems such as refrigerators, freezers, and air-conditioners including automotive, home, commercial, and industrial air-conditioners.
  • compression-type systems such as refrigerators, freezers, and air-conditioners including automotive, home, commercial, and industrial air-conditioners.
  • the following examples are illustrative of the liquid compositions of the present invention. Parts by Wt.
  • Example B 1,1,2,2-tetrafluoroethane 60
  • Example C HCFC-134a 45 Product of Example 6 55
  • Example D HCFC-134a 80 Product of Example 1 20
  • Table 2 contains further examples of the liquid compositions of the present invention.
  • Table 2 F E H I J HFC-134a 80 85 60 45 85 Lubricant of Example: III 20 V 15 55 II 40 15

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Lubricants (AREA)
EP93303330A 1992-04-28 1993-04-28 Compositions liquides contenant des esters d'acides carboxyliques Withdrawn EP0568349A1 (fr)

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US874911 1992-04-28

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JP (1) JPH0641574A (fr)
AU (1) AU3711493A (fr)
BR (1) BR9300993A (fr)
CA (1) CA2094854A1 (fr)
FI (1) FI931887L (fr)
MX (1) MX9302438A (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998008801A1 (fr) * 1996-08-30 1998-03-05 Exxon Chemical Patents Inc. Base d'huile de turbine aeronautique a odeur reduite et grande stabilite
US6177387B1 (en) * 1996-08-30 2001-01-23 Exxon Chemical Patents Inc Reduced odor and high stability aircraft turbine oil base stock

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9300996A (pt) * 1992-04-28 1993-11-16 Lubrizol Corp Composicao liquida e metodo para lubrificar um sistema de refrigeracao
SG186883A1 (en) * 2010-08-24 2013-02-28 Jx Nippon Oil & Energy Corp Refrigerating machine oil and working fluid composition for refrigerating machines
TWI555838B (zh) * 2015-02-10 2016-11-01 百達精密化學股份有限公司 迴轉式螺桿壓縮機的潤滑方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406479A1 (fr) * 1989-07-05 1991-01-09 Japan Energy Corporation Lubrifiants pour la réfrigération
US5021179A (en) * 1990-07-12 1991-06-04 Henkel Corporation Lubrication for refrigerant heat transfer fluids
EP0430657A1 (fr) * 1989-11-29 1991-06-05 Asahi Denka Kogyo Kabushiki Kaisha Lubrifiant pour réfrigérateurs
EP0435253A1 (fr) * 1989-12-28 1991-07-03 Nippon Oil Company, Limited Huiles pour réfrigérateur utilisés avec des réfrigérants halogénocarbonés contenant de l'hydrogène
EP0458584A1 (fr) * 1990-05-22 1991-11-27 Unichema Chemie B.V. Librifiants
WO1991018073A1 (fr) * 1990-05-17 1991-11-28 The Lubrizol Corporation Compositions a teneur en phosphore pour systemes de refrigeration
EP0468729A1 (fr) * 1990-07-23 1992-01-29 Castrol Limited Lubrification de dispositifs d'échange de chaleur à compression de vapeur
EP0498152A1 (fr) * 1991-01-17 1992-08-12 Cpi Engineering Services, Inc. Composition lubrifiante pour réfrigerants fluorés

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406479A1 (fr) * 1989-07-05 1991-01-09 Japan Energy Corporation Lubrifiants pour la réfrigération
EP0430657A1 (fr) * 1989-11-29 1991-06-05 Asahi Denka Kogyo Kabushiki Kaisha Lubrifiant pour réfrigérateurs
EP0435253A1 (fr) * 1989-12-28 1991-07-03 Nippon Oil Company, Limited Huiles pour réfrigérateur utilisés avec des réfrigérants halogénocarbonés contenant de l'hydrogène
WO1991018073A1 (fr) * 1990-05-17 1991-11-28 The Lubrizol Corporation Compositions a teneur en phosphore pour systemes de refrigeration
EP0458584A1 (fr) * 1990-05-22 1991-11-27 Unichema Chemie B.V. Librifiants
US5021179A (en) * 1990-07-12 1991-06-04 Henkel Corporation Lubrication for refrigerant heat transfer fluids
EP0468729A1 (fr) * 1990-07-23 1992-01-29 Castrol Limited Lubrification de dispositifs d'échange de chaleur à compression de vapeur
EP0498152A1 (fr) * 1991-01-17 1992-08-12 Cpi Engineering Services, Inc. Composition lubrifiante pour réfrigerants fluorés

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998008801A1 (fr) * 1996-08-30 1998-03-05 Exxon Chemical Patents Inc. Base d'huile de turbine aeronautique a odeur reduite et grande stabilite
US6177387B1 (en) * 1996-08-30 2001-01-23 Exxon Chemical Patents Inc Reduced odor and high stability aircraft turbine oil base stock

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FI931887A7 (fi) 1993-10-29
AU3711493A (en) 1993-11-04
FI931887A0 (fi) 1993-04-27
CA2094854A1 (fr) 1993-10-29
BR9300993A (pt) 1993-11-16
FI931887L (fi) 1993-10-29
MX9302438A (es) 1994-06-30
NO931532L (no) 1993-10-29
NO931532D0 (no) 1993-04-27

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