WO2002053687A2 - Lubricating oil composition - Google Patents

Lubricating oil composition Download PDF

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Publication number
WO2002053687A2
WO2002053687A2 PCT/EP2002/000041 EP0200041W WO02053687A2 WO 2002053687 A2 WO2002053687 A2 WO 2002053687A2 EP 0200041 W EP0200041 W EP 0200041W WO 02053687 A2 WO02053687 A2 WO 02053687A2
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WO
WIPO (PCT)
Prior art keywords
oil composition
lubricating oil
propionic acid
weight
composition according
Prior art date
Application number
PCT/EP2002/000041
Other languages
French (fr)
Other versions
WO2002053687A3 (en
Inventor
Yoshiharu Baba
Original Assignee
Shell Internationale Research Maatschappij B.V.
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 Shell Internationale Research Maatschappij B.V. filed Critical Shell Internationale Research Maatschappij B.V.
Priority to BR0206298-4A priority Critical patent/BR0206298A/en
Priority to US10/250,427 priority patent/US20040053794A1/en
Priority to EP02715390A priority patent/EP1354023A2/en
Priority to AU2002224973A priority patent/AU2002224973B2/en
Priority to CA002433447A priority patent/CA2433447A1/en
Publication of WO2002053687A2 publication Critical patent/WO2002053687A2/en
Publication of WO2002053687A3 publication Critical patent/WO2002053687A3/en

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    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M137/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
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    • C10M101/00Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02Petroleum fractions
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    • C10M137/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04Phosphate esters
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    • C10M137/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04Phosphate esters
    • C10M137/10Thio derivatives
    • C10M137/105Thio derivatives not containing metal
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    • C10M169/00Lubricating 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
    • C10M169/04Mixtures of base-materials and additives
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    • C10M2203/00Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/1006Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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    • C10M2203/10Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102Aliphatic fractions
    • C10M2203/1025Aliphatic fractions used as base material
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    • C10M2203/10Petroleum or coal fractions, e.g. tars, solvents, bitumen
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    • C10M2203/10Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/106Naphthenic fractions
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    • C10N2040/044Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for manual transmissions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/04Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/046Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for traction drives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/08Hydraulic fluids, e.g. brake-fluids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/135Steam engines or turbines

Definitions

  • the present invention relates to a lubricating oil composition which exhibits excellent lubricating performance, even under severe high pressure/high load working conditions .
  • the use of industrial machines at higher speeds, under higher pressures, and the miniaturization thereof has resulted in machine elements such as hydraulic machines, compressors, turbines, gear elements and bearings being operated under severer conditions.
  • the lubricating oil used must therefore exhibit excellent lubricating performance to sufficiently guarantee the life of these machines over long periods even when they are used at high pressure, high speed, high load and high temperatures .
  • zinc dialkyl dithiophosphates have been used in anti-wear lubricating oil compositions for lubricating oils for industrial machines .
  • these compounds are disadvantageous in terms of their instability to hydrolysis on contamination with water and their instability to thermal oxidation at high temperature and high pressure, and in that an unpleasant odour is generated as the lubricating oil deteriorates .
  • Anti-wear lubricating oil compositions comprising sulphur compounds, phosphorous compounds and phosphorous- sulphur-based combinations thereof are already known as zinc-free anti-wear lubricating oils which do not contain zinc dialkyl dithiophosphates .
  • the present invention therefore aims to provide a lubricating oil composition which contains as little ash (e.g. zinc) as possible and has excellent anti-wear properties, even when used under severe high pressure, high speed and high load conditions, and which is excellent in terms of its thermal oxidation stability, water resistance and odour and also in terms of the 1 ⁇ environment, safety and its lubricating oil performance in practice.
  • as little ash e.g. zinc
  • the present invention provides a lubricating oil composition, comprising ⁇ -dithiophosphorylated propionic acid (A) , triaryl phosphate (B) and base oil comprising mineral oil and/or synthetic oil.
  • ⁇ -dithiophosphorylated propionic acid (A) is represented by the general formula (1) below: -
  • R 1 represents a branched alkyl group of from 3 to 8 carbon atoms, preferably from 3 to 4 carbon atoms
  • R 2 represents a hydrogen atom or an alkyl group of from 1 to 4 carbon atoms
  • Rl can be chosen from the following branched alkyl groups:- isopropyl group, branched butyl group, branched pentyl group, branched hexyl group, branched heptyl group, and branched octyl group.
  • R 2 include hydrogen, methyl, ethyl, propyl and butyl groups .
  • R 2 is a methyl group, ethyl group or hydrogen group. It is particularly preferred that R 2 is methyl .
  • Such compounds include 3- (O,0-diisopropyldithiophosphoryl) propionic acid,
  • (A) added in the present invention is preferably from 0.001 to 1.0 % by weight, more preferably from 0.001 to 0.5 % by weight, even more preferably from 0.001 to 0.1 % by weight, and most preferably from 0.005 to 0.05 % by weight, with respect to the total amount of lubricating oil composition.
  • the triaryl phosphate (B) is represented by the general formula (2) below: -
  • 0 P(-0-R 3 ) 3 (2) wherein each 3 is independently a phenyl group or a phenyl group having alkyl group (s) of from 1 to 9 carbon atoms .
  • suitable triaryl phosphates (B) include triphenyl phosphate ester, tricresyl phosphate ester, triethyl phenyl phosphate ester, tripropyl phenyl phosphate ester, tributyl phenyl phosphate ester, triheptyl phenyl phosphate ester, trihexyl phenyl phosphate ester, triheptyl phenyl phosphate ester, trioctyl phenyl phosphate ester and trinonyl phenyl phosphate ester .
  • the amount of triaryl phosphate (B) used in the present invention is preferably from 0.05 to 10 % by weight, more preferably from 0.05 to 5 % weight and most preferably from 0.1 to 2 % by weight with respect to the total amount of lubricating oil base oil.
  • the lubricating oil composition exhibits wear corresponding to no more than 150 mg, which meets DIN 51524 (Part 2) standard, in a "Vickers V104 C" vane pump test (according to IP 281) .
  • the lubricating oil composition exhibits vane wear corresponding to no more than 15 mg and ring wear corresponding to no more than 75 mg, which meets "Vickers" standard M-2950-S, in a "Vickers 35VQ25A” vane pump test (according to "Vickers” M-2950-S) .
  • the lubricating oil composition exhibits vane wear corresponding to no more than 10 mg and ring wear corresponding to no more than 50 mg, which meets "General Motors” Standard LS-2LH.03.04.06, in a "Vickers 35VQ25A" vane pump test (according to "Vickers” M-2950-S) .
  • the lubricating oil composition according to the present invention may be used as a hydraulic oil composition, a compressor oil composition, a turbine oil composition, a bearing oil composition, and/or a gear oil composition.
  • said base oil in the lubricating oil composition of the present invention.
  • said base oil is petroleum-based, synthetic hydrocarbon-based and/or ester-based.
  • the preferred physical properties of the base oil are as follows : a kinematic viscosity of from 2 to 680 mm 2 /s (40°C) , preferably from 5 to 320 mm 2 /s (40°C) and more preferably from 8 to 220 mm 2 /s (40 °C) ; a total sulphur content (% by weight) of from 0 to 1% and preferably from 0 to 0.3%; a total nitrogen content (weight ppm) of from 0 to
  • Petroleum-based lubricating oil base oils which can be used in the present invention include solvent purified base oil, hydrogenation purified base oil and highly hydrocracked base oil. Such base oils can be used individually or as mixtures.
  • Highly hydrocracked base oil is a base oil having a viscosity index of at least 130 (typically from 145 to
  • Said base oil can be obtained by taking a starting material wax (slack wax) which has been separated by solvent dewaxing, and hydrogenating said wax in the presence of a catalyst (catalytic degradation) to convert linear paraffin to branched paraffin.
  • said base oil can be obtained by taking as starting material the hydrogen and carbon monoxide obtained by subjecting natural gas (methane or the like) to the gas formation process (partial oxidation) , then subjecting said starting material to Fischer-Tropsch polymerisation to yield heavy linear paraffin, and then modifying said heavy linear paraffin to catalytic degradation as described above .
  • the synthetic hydrocarbon-based base oil used in the present invention can be an olefin oligomer obtained by homopolymerizing or copolymerizing monomer chosen from linear or branched olefinic hydrocarbons of from 3 to 15, preferably from 4 to 12 , carbon atoms .
  • petroleum-based base oil or synthetic hydrocarbon-based base oil can be used individually, or in mixtures thereof.
  • Triaryl phosphate esters have long been known as anti-wear agents for use under relatively mild conditions, and, as disclosed in US Patent Number 5922657 (corresponding to Japanese Unexamined Patent Application Number H10-67993) , ⁇ -dithiophosphorylated propionic acid is known to improve extreme pressure performance and prevent gear seizure.
  • the anti-wear properties under severe high pressure/high load conditions can be improved to equivalent to or better than those achieved when ⁇ -dithiophosphorylated propionic acid is used alone, by the combined use of the abovementioned anti-wear component triarylphosphate ester.
  • various other commonly used additives may also be added if necessary in the present invention in order to further improve performance .
  • lubricating oil additives such as antioxidant, rust preventer, metal deactivator, detergent dispersant, anti- wear agent, extreme-pressure agent, friction regulator, flow point depressor, viscosity index improver, anti- emulsification agent and defoamer.
  • examples of amine-based antioxidants include dialkyldiphenylamines such as p,p' -dioctyl- diphenylamine (manufactured by Seiko Kagaku under the trade designation "Nonflex OD-3"), p,p'-di- ⁇ - methylbenzyldiphenylamine and N-p-butylphenyl-N-p' - octylphenylamine; monoalkyldiphenylamines such as mono-t- butyldiphenylamine and monooctyldiphenylamines; bis (dialkylphenyl) amines such as di(2,4- diethylphenyl) amine and di (2-ethyl-4-nonylphenyl) amine; alkylphenyl-1-naphthylamines such as octylphenyl-1- naphthylamine and N-t-dodecylpheny
  • sulphur-based antioxidants examples include dialkyl sulphates such as didodecyl sulphate and dioctadecyl sulphate, thiodipropionic acid esters such as didodecyl thiodipropionate, dioctadecyl thiodipropionate, dimyristyl thiodipropionate and dodecyloctadecyl thiodipropionate, and 2-mercaptobenzimidazole.
  • dialkyl sulphates such as didodecyl sulphate and dioctadecyl sulphate
  • thiodipropionic acid esters such as didodecyl thiodipropionate, dioctadecyl thiodipropionate, dimyristyl thiodipropionate and dodecyloctadecyl thiodipropionate
  • phenol-based antioxidants examples include 2,6- di-t-butyl-4-alkylphenols such as 2-t-butylphenol, 2-t- butyl-4-methylphenol, 2-t-butyl-5-methylphenol, 2,4-di-t- butylphenol, 2, 4-dimethyl-6-t-butylphenol, 2-t-butyl-4- methoxyphenol , 3-t-butyl-4-methoxyphenol, 2,5-di-t- butylhydroquinone (manufactured by Kawaguchi Kagaku under the trade designation "Antage DBH") , 2,6-di-t- butylphenol, 2, 6-di-t-butyl-4-methylphenol and 2,6-di-t- butyl-4-ethylphenol; 2, 6-di-t-butyl-4-alkoxyphenols such as 2, 6-di-t-butyl-4-methoxyphenol and 2, 6-di-t-butyl-4- ethoxyphenol
  • phosphorous-based antioxidants examples include triaryl phosphites such as triphenyl phosphite and tricresyl phosphite, trialkyl phosphites such as trioctadecyl phosphite and tridecyl phosphite, and tridodecyl trithiophosphite .
  • antioxidants can be used individually, or a plurality can be used in combination, and the amount added thereof may conveniently be from 0.01 to 2.0 parts by weight per 100 parts by weight of base oil.
  • (dodecyldithio) benzimidazole, and 2- (alkyldithio) - toluimidazoles such as 2- (octyldithio) toluimidazole, 2- decyldithio) toluimidazole and 2- (dodecyldithio) - toluimidazole; indazole, and indazole derivatives, for example, toluindazoles such as 4-alkyl-indazole and 5- alkyl-indazole; benzothiazole, and benzothiazole derivatives, for example, 2- (alkyldithio) benzothiazoles such as 2-mercaptobenzothiazole derivative (manufactured by Chiyoda Kagaku under the trade designation "Thiolite B-3100"), 2- (hexyldithio) -benzothiazole and 2-
  • metal deactivators can be used individually, or a plurality can be used in combination, and the amount added thereof may conveniently be from 0.005 to 0.5 parts by weight per 100 parts by weight of base oil.
  • defoamers which can be used include organosilicates such as dimethylpolysiloxane, diethyl silicate and fluorosilicone, and non-silicone defoamers such as polyalkyl acrylates . These can be used individually or a plurality can be used in combination, and the amount added thereof may conveniently be from
  • viscosity index improvers examples include non- dispersant-type viscosity index improvers for example, polymethacrylates and olefin copolymers such as ethylene/propylene copolymer and styrene/diene copolymer, and dispersion-type viscosity index improvers such as those obtained by copolymerizing these with nitrogen- containing monomers .
  • the amount added thereof may conveniently be from 0.05 to 20 parts by weight per 100 parts by weight of base oil .
  • flow point depressors examples include polymethacrylate-based polymers. The amount added thereof may conveniently be from 0.01 to 5 parts by weight per 100 parts by weight of base oil. '
  • detergent dispersants include metal- based detergents, for example, neutral or basic alkaline earth metal sulphonates, alkaline earth metal phenates and alkaline earth metal salicylates, and ashless dispersants, for example modified products obtained from alkenyl succinate imides, alkenyl succinate esters or boron compounds, sulphur compounds etc. thereof. These can be used individually or a plurality can be used in combination, and the amount added thereof may conveniently be from 0.01 to 1 parts by weight per 100 parts by weight of base oil .
  • extreme-pressure agents and friction regulators include sulphur-based extreme-pressure agents such as dialkyl sulphides, dibenzyl sulphide, dialkyl polysulphides, dibenzyl disulphide, alkyl mercaptans, dibenzothiophene and 2, 2' -dithiobis (benzothiazole) ,- phosphorous-based extreme-pressure agents such as trialkyl phosphates, trialkyl phosphonates, trialkyl phosphites, triaryl phosphites, dialkyl hydrogen phosphites, trialkyl trithiophosphites and triaryl phosphorothioates; aliphatic friction regulators such as fatty acid amides and fatty acid esters; amine-based friction regulators such as primary to tertiary alkylamines and alkylene oxide adducts of alkyl amines; and extreme-pressure agents such as zinc alkyl dithiophosphates.
  • rust preventers examples include N-alkylsarcosinic acids, alkylate phenoxy acetates, imidazolines, "KX1031" manufactured by King Industry and alkaline earth metal salts thereof and amine salts thereof, the N-acyl-N-alkoxyalkyl asparginate esters disclosed in Japanese Unexamined Patent Application Number H6-200268, the alkaline earth metal salts of phosphate esters disclosed in EP-A-0801116 and alkenyl succinate ester-based rust preventers . These rust preventers can be used individually or a plurality can be used in combination, and the amount added may conveniently be in the range of from 0.005 to 1.0 parts by weight can be used per 100 parts by weight of base oil.
  • anti-emulsifying agents used to break up emulsions to allow separation into two liquid layers
  • examples of anti-emulsifying agents include commonly known substances which are usually used as lubricating oil additives, for example, polyalkylene glycol-based nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers and polyoxyethylene alkyl naphthyl ethers .
  • the amount added may conveniently be in the range of from 0.0005 to 0.5 parts by weight per 100 parts by weight of base oil. It is particularly appropriate to use the lubricating oil composition of the present invention as a hydraulic oil composition as described above.
  • said lubricating oil composition can also be used in other ways, for example, as a compressor oil composition, turbine oil composition, bearing oil composition or gear oil composition.
  • test oil having a kinematic viscosity of 32 mm 2 /s at 40°C.
  • the pump test was performed for 50 h at a pressure of 210 kgf/cm 2 , 2400 rpm, oil temperature 93 °C using a "Vickers 35VQ-25A" pump, and the wear on the vane and ring was measured after the test .
  • the "Vickers" M-2950-S criterion is that the vane wear be equivalent to no more than 15 mg and the ring wear be equivalent to no more than 75 mg.
  • the "General Motors" LS-2 LH.03.04.06 criteria are stricter: vane wear corresponding to no more than 10 mg and ring wear corresponding to no more than 50 mg.
  • Component 1 is a ⁇ - dithiophosphorylated propionic acid represented by general formula (1) in which R 1 is an isobutyl group and R 2 is a methyl group .
  • Component 2 in Tables 2 and 3 is a triarylphosphate sold under the trade designation "Reofos 65" ex. Aj inomoto .
  • Component 3 is a ⁇ -dithiophosphorylated propionic acid represented by the general formula (1) in which R ⁇ is an isobutyl group and R 2 is a hydrogen group.
  • Triphenylphosphorothioate in Table 3 is that sold under the trade designation "Irgalube TPPT" ex. Ciba. TABLE 4
  • Comparative Examples 1 and 2 did not exhibit adequate anti-wear properties in the "Vickers V104C” vane pump test and did not have the anti-wear properties required to pass German Standard DIN 51524 (part 2) .
  • Comparative Examples 3 and 4 did pass German Standard DIN 51524 (part 2) in the "Vickers V104C” vane pump test, but did not exhibit adequate anti-wear properties in the "Vickers 35VQ25A” vane pump test and did not pass the "Vickers” M-2950-S standard or "General Motors" LS-2 LH.03.04.06 standard.
  • Comparative Examples 7 and 8 exhibited anti-wear properties sufficient to pass German Standard DIN 51524 (part 2) in the V104C vane pump test, but their anti-wear properties were not sufficient to pass the "Vickers” M-2950-S standard or the "General Motors” LS-2-LH.03.04.06 standard.
  • the lubricating oil composition according to the present invention (Working Examples 1 and 2) have excellent anti-wear properties sufficient to pass German Standard DIN 51524 (Part 2) , "Vickers” M-2950-S standard and “General Motors” LS-2 LH.03.04.06 standard, in vane pump tests “Vickers” V104C and 35VQ25A, and their lubricating oil performance is sufficient for use as a hydraulic oil in high-pressure applications. Comparative Example 5 shows increased total wear in both tests when compared to Working Examples 1 and 2.
  • Comparative Examples 9 and 10 were performed in order to see whether the thermal oxidative stability is better when R 2 in the ⁇ -dithiophosphorylated propionic acid is hydrogen or when it is a methyl group.
  • the composition and results for Comparative Examples 9 and 10 are shown in Table 6.
  • the thermal oxidative stability test was performed as follows: 200 ml of test oils of Comparative Examples 9 and 10, obtained by combining ⁇ -dithiophosphorylated propionic acid and antioxidant and rust preventer, were independently introduced into 250 ml beakers, a steel sample and copper sample of diameter 0.6 mm and length 7.6 mm, which had been polished using # 240 alumina polishing paper, washed and dried, were intersected and the test oils were applied thereto, and the test oils were subjected to thermal oxidative deterioration for 336 hours in a 140°C oven, and after the test the test oils were suction-filtered using a 0.8 ⁇ m hole diameter filter and the amount of sludge obtained, the external appearance of the copper sample and steel sample and the colour of the test oil (ASTM D1500) were measured.
  • the compound of Comparative Example 10 in which one of the hydrogen atoms on the ⁇ -carbon of the ⁇ -dithiophosphorylated propionic acid has been substituted by an alkyl group undergoes less change in colour and produces less sludge, that is, is more stable, than the compound of Comparative Example 9 in which there is no alkyl substitution of the hydrogen atoms on the ⁇ -carbon. If there are too many carbon atoms in the alkyl group substitutions on the ⁇ - carbon, anti-wear properties deteriorate and so in order to achieve both thermal oxidative stability and anti-wear properties, the alkyl group substituent is most preferably a methyl group .
  • Lubricating oil compositions of the present invention contain no, or almost no, ash-forming substances such as zinc dialkyl dithiophosphates, in view of environmental and safety considerations; the resulting anti-wear lubricating oil compositions exhibit excellent anti-wear with respect to various machine elements even when used under severe high pressure, high speed and high load conditions. Accordingly, the lubricating oil compositions of the present invention are highly effective in the provision of lubricating oil which can guarantee the reliability of equipment over long periods, in response to the recently developed high speed, high pressure and high precision industrial machines.

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Abstract

Lubricating oil composition comprising β-dithiophosphorylated propionic acid (A), triaryl phosphate (B) and base oil comprising mineral oil and/or synthetic oil.

Description

LUBRICATING OIL COMPOSITION
The present invention relates to a lubricating oil composition which exhibits excellent lubricating performance, even under severe high pressure/high load working conditions . The use of industrial machines at higher speeds, under higher pressures, and the miniaturization thereof has resulted in machine elements such as hydraulic machines, compressors, turbines, gear elements and bearings being operated under severer conditions. The lubricating oil used must therefore exhibit excellent lubricating performance to sufficiently guarantee the life of these machines over long periods even when they are used at high pressure, high speed, high load and high temperatures . In response to these demands, zinc dialkyl dithiophosphates have been used in anti-wear lubricating oil compositions for lubricating oils for industrial machines . However these compounds are disadvantageous in terms of their instability to hydrolysis on contamination with water and their instability to thermal oxidation at high temperature and high pressure, and in that an unpleasant odour is generated as the lubricating oil deteriorates .
In addition to the abovementioned problems, there are increasing concerns over the use of zinc compounds such as zinc dialkyl dithiophosphates in view of recent questions regarding environmental protection and toxicity.
Anti-wear lubricating oil compositions comprising sulphur compounds, phosphorous compounds and phosphorous- sulphur-based combinations thereof are already known as zinc-free anti-wear lubricating oils which do not contain zinc dialkyl dithiophosphates .
Specifically, the combination of sulphurated hydrocarbon and acidic phosphoric acid ester and the combination of triaryl phosphorothionate, triaryl phosphate and acidic phosphate ester amine salt, as disclosed in GB Patent Number 1415964, are known, but the corrosive properties and odour of sulphurated hydrocarbon poses problems, and highly active acidic phosphate esters are disadvantageous in that, for example, they cause hydrolytic deterioration and a decrease in thermal oxidation stability.
The present invention therefore aims to provide a lubricating oil composition which contains as little ash (e.g. zinc) as possible and has excellent anti-wear properties, even when used under severe high pressure, high speed and high load conditions, and which is excellent in terms of its thermal oxidation stability, water resistance and odour and also in terms of the1 < environment, safety and its lubricating oil performance in practice.
The present invention provides a lubricating oil composition, comprising β-dithiophosphorylated propionic acid (A) , triaryl phosphate (B) and base oil comprising mineral oil and/or synthetic oil.
In a preferred embodiment, β-dithiophosphorylated propionic acid (A) is represented by the general formula (1) below: -
S=P(-0R1)2SCH2CH(R2)C00H (1) wherein R1, which may be identical or different, represents a branched alkyl group of from 3 to 8 carbon atoms, preferably from 3 to 4 carbon atoms, and R2 represents a hydrogen atom or an alkyl group of from 1 to 4 carbon atoms . Rl can be chosen from the following branched alkyl groups:- isopropyl group, branched butyl group, branched pentyl group, branched hexyl group, branched heptyl group, and branched octyl group. Examples of R2 include hydrogen, methyl, ethyl, propyl and butyl groups . Prefer bly, R2 is a methyl group, ethyl group or hydrogen group. It is particularly preferred that R2 is methyl .
Specific examples of such compounds include 3- (O,0-diisopropyldithiophosphoryl) propionic acid,
3- (O,0-diisopropyldithiophosphoryl) -2-methyl-propionic acid, 3- (0,0-diisobutyldithiophosphoryl) -propionic acid and 3- (0,0-diisobutyldithiophosphoryl) -2-methyl-propionic acid. The amount of β-dithiophosphorylated propionic acid
(A) added in the present invention is preferably from 0.001 to 1.0 % by weight, more preferably from 0.001 to 0.5 % by weight, even more preferably from 0.001 to 0.1 % by weight, and most preferably from 0.005 to 0.05 % by weight, with respect to the total amount of lubricating oil composition.
If the amount of (A) added is less than 0.001 % by weight, adequate synergistic effects may not be achieved, whereas if the amount of (A) added exceeds 0.5 % by weight, the lubricating performance reaches saturation, and there may be a deterioration in thermal oxidation stability, hydrolysis stability and corrosion properties, which is undesirable.
In a preferred embodiment, the triaryl phosphate (B) is represented by the general formula (2) below: -
0=P(-0-R3)3 (2) wherein each 3 is independently a phenyl group or a phenyl group having alkyl group (s) of from 1 to 9 carbon atoms . Specific examples of suitable triaryl phosphates (B) include triphenyl phosphate ester, tricresyl phosphate ester, triethyl phenyl phosphate ester, tripropyl phenyl phosphate ester, tributyl phenyl phosphate ester, triheptyl phenyl phosphate ester, trihexyl phenyl phosphate ester, triheptyl phenyl phosphate ester, trioctyl phenyl phosphate ester and trinonyl phenyl phosphate ester .
The amount of triaryl phosphate (B) used in the present invention is preferably from 0.05 to 10 % by weight, more preferably from 0.05 to 5 % weight and most preferably from 0.1 to 2 % by weight with respect to the total amount of lubricating oil base oil.
If less than 0.05 % by weight of (B) is added, sufficient lubricating performance may not be achieved, whereas if more than 10 % by weight of (B) is added, the lubricating performance reaches saturation and there may be a deterioration in thermal oxidation stability and hydrolysis stability, which is undesirable. ' In a preferred embodiment of the present invention, the lubricating oil composition exhibits wear corresponding to no more than 150 mg, which meets DIN 51524 (Part 2) standard, in a "Vickers V104 C" vane pump test (according to IP 281) . In another preferred embodiment of the present invention, the lubricating oil composition exhibits vane wear corresponding to no more than 15 mg and ring wear corresponding to no more than 75 mg, which meets "Vickers" standard M-2950-S, in a "Vickers 35VQ25A" vane pump test (according to "Vickers" M-2950-S) .
In yet another preferred embodiment of the present invention, the lubricating oil composition exhibits vane wear corresponding to no more than 10 mg and ring wear corresponding to no more than 50 mg, which meets "General Motors" Standard LS-2LH.03.04.06, in a "Vickers 35VQ25A" vane pump test (according to "Vickers" M-2950-S) .
The lubricating oil composition according to the present invention may be used as a hydraulic oil composition, a compressor oil composition, a turbine oil composition, a bearing oil composition, and/or a gear oil composition. ι
There are no particular limitations regarding the base oil in the lubricating oil composition of the present invention. Preferably, said base oil is petroleum-based, synthetic hydrocarbon-based and/or ester-based.
The preferred physical properties of the base oil are as follows : a kinematic viscosity of from 2 to 680 mm2/s (40°C) , preferably from 5 to 320 mm2/s (40°C) and more preferably from 8 to 220 mm2/s (40 °C) ; a total sulphur content (% by weight) of from 0 to 1% and preferably from 0 to 0.3%; a total nitrogen content (weight ppm) of from 0 to
100 ppm and preferably from 0 to 30 ppm; and/or an aniline point of from 80 to 130 °C and preferably from 100 to 125°C.
Petroleum-based lubricating oil base oils which can be used in the present invention include solvent purified base oil, hydrogenation purified base oil and highly hydrocracked base oil. Such base oils can be used individually or as mixtures.
Highly hydrocracked base oil is a base oil having a viscosity index of at least 130 (typically from 145 to
155) . Said base oil can be obtained by taking a starting material wax (slack wax) which has been separated by solvent dewaxing, and hydrogenating said wax in the presence of a catalyst (catalytic degradation) to convert linear paraffin to branched paraffin. Alternatively, said base oil can be obtained by taking as starting material the hydrogen and carbon monoxide obtained by subjecting natural gas (methane or the like) to the gas formation process (partial oxidation) , then subjecting said starting material to Fischer-Tropsch polymerisation to yield heavy linear paraffin, and then modifying said heavy linear paraffin to catalytic degradation as described above .
The synthetic hydrocarbon-based base oil used in the present invention can be an olefin oligomer obtained by homopolymerizing or copolymerizing monomer chosen from linear or branched olefinic hydrocarbons of from 3 to 15, preferably from 4 to 12 , carbon atoms .
In the present invention, petroleum-based base oil or synthetic hydrocarbon-based base oil can be used individually, or in mixtures thereof. '
Triaryl phosphate esters have long been known as anti-wear agents for use under relatively mild conditions, and, as disclosed in US Patent Number 5922657 (corresponding to Japanese Unexamined Patent Application Number H10-67993) , β-dithiophosphorylated propionic acid is known to improve extreme pressure performance and prevent gear seizure.
However, in the present invention, the anti-wear properties under severe high pressure/high load conditions can be improved to equivalent to or better than those achieved when β-dithiophosphorylated propionic acid is used alone, by the combined use of the abovementioned anti-wear component triarylphosphate ester.
In addition to the abovementioned indispensable components, various other commonly used additives may also be added if necessary in the present invention in order to further improve performance . Thus, it is possible to add commonly known lubricating oil additives such as antioxidant, rust preventer, metal deactivator, detergent dispersant, anti- wear agent, extreme-pressure agent, friction regulator, flow point depressor, viscosity index improver, anti- emulsification agent and defoamer.
For example, examples of amine-based antioxidants include dialkyldiphenylamines such as p,p' -dioctyl- diphenylamine (manufactured by Seiko Kagaku under the trade designation "Nonflex OD-3"), p,p'-di-α- methylbenzyldiphenylamine and N-p-butylphenyl-N-p' - octylphenylamine; monoalkyldiphenylamines such as mono-t- butyldiphenylamine and monooctyldiphenylamines; bis (dialkylphenyl) amines such as di(2,4- diethylphenyl) amine and di (2-ethyl-4-nonylphenyl) amine; alkylphenyl-1-naphthylamines such as octylphenyl-1- naphthylamine and N-t-dodecylphenyl-1-naphthylamine; arylnaphthylamines such as 1-naphthylamine, phenyl-1- naphthylamine, phenyl-2-naphthylamine, N-hexylphenyl-2- naphthylamine and N-octylphenyl-2-naphthylamine; phenylenediamines such as N,N' -diisopropyl-p- phenylenediamine and N,N' -diphenyl-p-phenylenediamine; and phenothiazines such as phenothiazine (manufactured by Hodogaya Kagaku: Phenothiazine) and 3,7- • dioctylphenothiazine.
Examples of sulphur-based antioxidants include dialkyl sulphates such as didodecyl sulphate and dioctadecyl sulphate, thiodipropionic acid esters such as didodecyl thiodipropionate, dioctadecyl thiodipropionate, dimyristyl thiodipropionate and dodecyloctadecyl thiodipropionate, and 2-mercaptobenzimidazole.
Examples of phenol-based antioxidants include 2,6- di-t-butyl-4-alkylphenols such as 2-t-butylphenol, 2-t- butyl-4-methylphenol, 2-t-butyl-5-methylphenol, 2,4-di-t- butylphenol, 2, 4-dimethyl-6-t-butylphenol, 2-t-butyl-4- methoxyphenol , 3-t-butyl-4-methoxyphenol, 2,5-di-t- butylhydroquinone (manufactured by Kawaguchi Kagaku under the trade designation "Antage DBH") , 2,6-di-t- butylphenol, 2, 6-di-t-butyl-4-methylphenol and 2,6-di-t- butyl-4-ethylphenol; 2, 6-di-t-butyl-4-alkoxyphenols such as 2, 6-di-t-butyl-4-methoxyphenol and 2, 6-di-t-butyl-4- ethoxyphenol ; alkyl-3- (3 , 5-di-t-butyl-4-hydroxyphenyl) propionates such as 3, 5-di-t-butyl-4- hydroxybenzylmercaptooctyl acetate, n-octadecyl-3- (3, 5- di-t-butyl-4-hydroxyphenyl) propionate (manufactured by Yoshitomi Seiyaku under the trade designation "Yoshinox SS") , n-dodecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate and 2' -ethylhexyl-3- (3, 5-di-t-butyl-4- hydroxyphenyl) propionate; 2, 6-di-t-butyl-α- dimethylamino-p-cresol; 2,2' -methylenebis (4-alkyl-6-t- butylphenol) s such as 2, 2' -methylenebis (4-methyl-6-t- butylphenol) (manufactured by Kawaguchi Kagaku under the trade designation "Antage -400") and 2,2'- methylenebis (4-ethyl-6-t-butylphenol) (manufactured by Kawaguchi Kagaku under the trade designation "Antage - 500"); bisphenols such as 4,4' -butylidenebis (3-methyl-6- t-butylphenol) (manufactured by Kawaguchi Kagaku under the trade designation "Antage -300") , 4,4'- methylenebis (2, 6-di-t-butylphenol) (manufactured by
Laporte Performance Chemicals under the trade designation "Ionox 220AH") , 4, 4' -bis (2 , 6-di-t-butylphenol) , 2,2-(di- p-hydroxyphenyl) propane (bisphenol A), 2, 2-bis (3, 5-di-t- butyl- -hydroxyphenyl)propane, 4,4' -cyclo- hexylidenebis (2, 6-t-butylphenol) , hexamethylene glycol bis [3- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate] (manufactured by Ciba Speciality Chemicals under trade designation "Irganox L109") , triethylene glycol bis [3- (3- t-butyl-4-hydroxy-5-methylphenyl) propionate] (manufactured by Yoshitomi Seiyaku under the trade designation "To inox 917"), 2,2' -thio- [diethyl-3- (3, 5-di- t-butyl-4-hydroxyphenyl) propionate] (manufactured by Ciba Speciality Chemicals under the trade designation "Irganox L115"), 3,9-bis{l,l-dimethyl-2- [3- (3-t-butyl-4-hydroxy-5- methylphenyl) propionyloxy] ethyl} -2 , 4 , 8 , 10- tetraoxaspiro [5, 5]undecane (manufactured by Sumitomo Kagaku under the trade designation "Sumilyzer GA80") , 4,4' -thiobis (3-methyl-6-t-butylphenol) (manufactured by Kawaguchi Kagaku under the trade designation "Antage RC") and 2, 2' -thiobis (4, 6-di-t-butyl) resorcin; polyphenols such as tetrakis [methylene-3- (3,5-di-t-butyl-4- hydroxyphenyl) propionate] methane (manufactured by Ciba Speciality Chemicals under the trade designation "Irganox L101") , 1,1,3-tris (2~methyl-4-hydroxy-5-t-butylphenyl) - butane (manufactured by Yoshitomi Seiyaku under the trade designation "Yoshinox 930"), 1, 3, 5-trimethyl-2, 4, 6- tris (3, 5-di-t-butyl- -hydroxybenzyl)benzene (manufactured by Ciba Speciality Chemicals under the trade designation "Irganox 1330"), bis- [3 , 3 ' -bis- (4 ' -hydroxy-3 ' -t-butyl- phenyl) butyric acid] glycol ester, 2- (3 ' , 5' -di-t-butyl-4- hydroxyphenyl) ethyl-4- (2 ' ' , 4 ' ' -di-t-butyl-3 ' ' - hydroxyphenyl) methyl-6-t-butylphenol and 2,6-bis(2'- hydroxy-3' -t-butyl-5' -methylbenzyl) -4-methylphenol; and phenol-aldehyde condensates such as the condensate of p- t-butylphenol and formaldehyde and the condensate of p-t- butylphenol and acetaldehyde .
Examples of phosphorous-based antioxidants include triaryl phosphites such as triphenyl phosphite and tricresyl phosphite, trialkyl phosphites such as trioctadecyl phosphite and tridecyl phosphite, and tridodecyl trithiophosphite .
These antioxidants can be used individually, or a plurality can be used in combination, and the amount added thereof may conveniently be from 0.01 to 2.0 parts by weight per 100 parts by weight of base oil.
Examples of metal deactivators which can be used in the lubricant composition of the present invention include benzotriazole, and benzotriazole derivatives, for example, 4-alkylbenzotriazoles such as 4- methylbenzenotriazole and 4-ethylbenzotriazole, 5- alkylbenzotriazoles such as 5-methylbenzotriazole and 5- ethylbenzotriazole, 1-alkylbenzotriazoles such as 1- dioctylaminomethyl-2, 3-benzotriazole and 1- alkyltolutriazoles such as l-dioctylaminoτnethyl-2, 3- tolutriazole; benzimidazole, and benzimidazole derivatives, for example, 2- (alkyldithio)benzimidazoles such as 2- (octyldithio) enzimidazole, 2- (decyldithio) benzimidazole and 2-
(dodecyldithio) benzimidazole, and 2- (alkyldithio) - toluimidazoles such as 2- (octyldithio) toluimidazole, 2- decyldithio) toluimidazole and 2- (dodecyldithio) - toluimidazole; indazole, and indazole derivatives, for example, toluindazoles such as 4-alkyl-indazole and 5- alkyl-indazole; benzothiazole, and benzothiazole derivatives, for example, 2- (alkyldithio) benzothiazoles such as 2-mercaptobenzothiazole derivative (manufactured by Chiyoda Kagaku under the trade designation "Thiolite B-3100"), 2- (hexyldithio) -benzothiazole and 2-
(octyldithio) benzothiazole, 2- (alkyldithio) toluthiazoles such as 2- (hexyldithio) -toluthiazole and 2- (octyldithio) - toluthiazole, 2- (N,N-dialkyldithiocarbamyl) benzothiazoles such as 2- (N,N-diethyldithiocarbamyl) benzothiazole, 2- (N,N-dibutyldithiocarbamyl) benzothiazole and 2-(N,N- dihexyldithiocarbamyl) benzothiazole, and 2-(N,N- dialkyldithiocarbamyl) toluthiazoles such as 2-(N,N- diethyldithiocarbamyl) toluthiazole, 2- (N,N-dibutyl- dithiocarbamyl) toluthiazole and 2- (N,N-dihexyl- dithiocarbamyl) toluthiazole; benzoxazole derivatives, for example, 2- (alkyldithio) benzoxazoles such as 2- (octyldithio) benzoxazole, 2- (decyldithio) benzoxazole and 2- (dodecyldithio) benzoxazole, and 2- (alkyldithio) toluoxazoles such as 2- (octyldithio) toluoxazole, 2- (decyldithio) toluoxazole and 2- (dodecyldithio) - toluoxazole; thiadiazole derivatives, for example, 2,5- bis (alkyldithio) -1, 3, 4-thiadiazoles such as 2,5- bis (heptyldithio) -1, 3, 4-thiadiazole, 2, 5-bis (nonyl- dithio) -1,3, 4-thiazidazole, 2, 5 -bis (dodecyldithio) -1,3,4- thiadiazole and 2, 5-bis (octadecyldithio) -1, 3 , 4- thiadiazole, 2, 5-bis (N,N-dialkyldithiocarbamyl) -1,3,4- thiadiazoles such as 2, 5-bis (N,N-diethyldithiocarbamyl) - 1, 3 , 4-thiadiazole, 2 , 5-bis (N,N-dibutyldithiocarbamyl) - 1, 3 , 4-thiadiazole and 2 , 5-bis (N,N-dioctyldithiocarbamyl) - 1, 3 , 4-thiadiazole, and 2-N,N-dialkyldithiocarbamyl-5- mercapto-1, 3 , 4-thiadiazoles such as 2-N,N- dibutyldithiocarbamyl-5-mercapto-1, 3, 4-thiadiazole and 2- N,N-dioctyldithiocarbamyl-5-mercapto-1 ,3,4-thiadiazole; and triazole derivatives, for example, l-alkyl-2,4- triazoles such as l-dioctylaminomethyl-2,4-triazole .
These metal deactivators can be used individually, or a plurality can be used in combination, and the amount added thereof may conveniently be from 0.005 to 0.5 parts by weight per 100 parts by weight of base oil. Examples of defoamers which can be used include organosilicates such as dimethylpolysiloxane, diethyl silicate and fluorosilicone, and non-silicone defoamers such as polyalkyl acrylates . These can be used individually or a plurality can be used in combination, and the amount added thereof may conveniently be from
0.0001 to 0.1 parts by weight per 100 parts by weight of base oil.
Examples of viscosity index improvers include non- dispersant-type viscosity index improvers for example, polymethacrylates and olefin copolymers such as ethylene/propylene copolymer and styrene/diene copolymer, and dispersion-type viscosity index improvers such as those obtained by copolymerizing these with nitrogen- containing monomers . The amount added thereof may conveniently be from 0.05 to 20 parts by weight per 100 parts by weight of base oil .
Examples of flow point depressors include polymethacrylate-based polymers. The amount added thereof may conveniently be from 0.01 to 5 parts by weight per 100 parts by weight of base oil. '
Examples of detergent dispersants include metal- based detergents, for example, neutral or basic alkaline earth metal sulphonates, alkaline earth metal phenates and alkaline earth metal salicylates, and ashless dispersants, for example modified products obtained from alkenyl succinate imides, alkenyl succinate esters or boron compounds, sulphur compounds etc. thereof. These can be used individually or a plurality can be used in combination, and the amount added thereof may conveniently be from 0.01 to 1 parts by weight per 100 parts by weight of base oil .
Examples of extreme-pressure agents and friction regulators include sulphur-based extreme-pressure agents such as dialkyl sulphides, dibenzyl sulphide, dialkyl polysulphides, dibenzyl disulphide, alkyl mercaptans, dibenzothiophene and 2, 2' -dithiobis (benzothiazole) ,- phosphorous-based extreme-pressure agents such as trialkyl phosphates, trialkyl phosphonates, trialkyl phosphites, triaryl phosphites, dialkyl hydrogen phosphites, trialkyl trithiophosphites and triaryl phosphorothioates; aliphatic friction regulators such as fatty acid amides and fatty acid esters; amine-based friction regulators such as primary to tertiary alkylamines and alkylene oxide adducts of alkyl amines; and extreme-pressure agents such as zinc alkyl dithiophosphates. These extreme-pressure agents and friction regulators can be used individually, or a plurality can be used in combination, and the amount added thereof may conveniently be in the range from 0.05 to 5.0 parts by weight per 100 parts by weight of base oil.
Examples of rust preventers which can be used include N-alkylsarcosinic acids, alkylate phenoxy acetates, imidazolines, "KX1031" manufactured by King Industry and alkaline earth metal salts thereof and amine salts thereof, the N-acyl-N-alkoxyalkyl asparginate esters disclosed in Japanese Unexamined Patent Application Number H6-200268, the alkaline earth metal salts of phosphate esters disclosed in EP-A-0801116 and alkenyl succinate ester-based rust preventers . These rust preventers can be used individually or a plurality can be used in combination, and the amount added may conveniently be in the range of from 0.005 to 1.0 parts by weight can be used per 100 parts by weight of base oil.
Examples of anti-emulsifying agents (used to break up emulsions to allow separation into two liquid layers) include commonly known substances which are usually used as lubricating oil additives, for example, polyalkylene glycol-based nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers and polyoxyethylene alkyl naphthyl ethers . The amount added may conveniently be in the range of from 0.0005 to 0.5 parts by weight per 100 parts by weight of base oil. It is particularly appropriate to use the lubricating oil composition of the present invention as a hydraulic oil composition as described above. However, said lubricating oil composition can also be used in other ways, for example, as a compressor oil composition, turbine oil composition, bearing oil composition or gear oil composition.
The present invention will now be described with reference to the following Examples, which are not intended to limit the scope of the present invention in any way. Examples
The present invention is described specifically below by means of hydraulic oil working examples. Hydrogenation-purified base oil having a kinematic viscosity of 31 mm2/s at 40°C was used as the base oil, and the components shown below were added to yield base lubricating oil compositions .
The anti-wear agents shown in Tables 2, 3 and 4 were added to this base lubricating oil composition A
(Table 1) to yield test oil having a kinematic viscosity of 32 mm2/s at 40°C.
The amount of the various additive components in the test oils of Working Examples 1 and 2 and Comparative Examples 1 to 10 are given as parts by weight with respect to the test oil.
TABLE 1
Figure imgf000015_0001
Inventive lubricating oil composition (Working Examples 1 and 2) and conventional anti-wear compositions which do not comprise the inventive composition, by way of comparison, (Comparative Examples 1 to 6) were prepared according to the proportions shown in Tables 2 and 3.
The working example and comparative example compositions were subjected to vane pump tests as described below and the results are shown in Table 5.
Also, for comparison, the same performance appraisal tests were performed on commercial products obtained using the zinc-free ashless anti-wear hydraulic oils shown in Table 4 (Comparative Examples 7 and 8) , and these results are also shown in Table 5. It should be noted that the methods for the performance tests performed on the working examples and comparative examples were as follows. IP 281 "Vickers V104C" vane pump test In order to appraise the anti-wear performance of the test oil in a vane pump, the pump test was formed for 250 h at a pressure of 140 kgf/cm2, 1500 rpm, oil temperature 65°C using a "Vickers V104C" pump, and the wear of the vane and ring were measured after the test . The DIN 51524 (part 2) criterion for anti-wear hydraulic oil is that the total amount of wear on the vane and ring be equivalent to no more than 150 mg. "Vickers 35VQ-25A" vane pump test
In order to appraise the anti-wear performance of the test oil in a vane pump at high pressure, high speed and high temperature, the pump test was performed for 50 h at a pressure of 210 kgf/cm2, 2400 rpm, oil temperature 93 °C using a "Vickers 35VQ-25A" pump, and the wear on the vane and ring was measured after the test . The "Vickers" M-2950-S criterion is that the vane wear be equivalent to no more than 15 mg and the ring wear be equivalent to no more than 75 mg.
The "General Motors" LS-2 LH.03.04.06 criteria are stricter: vane wear corresponding to no more than 10 mg and ring wear corresponding to no more than 50 mg.
TABLE 2
Figure imgf000017_0001
TABLE 3
Figure imgf000018_0001
In Tables 2 and 3 above, Component 1 is a β- dithiophosphorylated propionic acid represented by general formula (1) in which R1 is an isobutyl group and R2 is a methyl group .
Component 2 in Tables 2 and 3 is a triarylphosphate sold under the trade designation "Reofos 65" ex. Aj inomoto .
Component 3 is a β-dithiophosphorylated propionic acid represented by the general formula (1) in which R^ is an isobutyl group and R2 is a hydrogen group.
Triphenylphosphorothioate in Table 3 is that sold under the trade designation "Irgalube TPPT" ex. Ciba. TABLE 4
Figure imgf000019_0001
Note: All commercial anti-wear hydraulic oils used were zinc free.
TABLE 5
Figure imgf000020_0001
Comparative Examples 1 and 2 did not exhibit adequate anti-wear properties in the "Vickers V104C" vane pump test and did not have the anti-wear properties required to pass German Standard DIN 51524 (part 2) . Comparative Examples 3 and 4 did pass German Standard DIN 51524 (part 2) in the "Vickers V104C" vane pump test, but did not exhibit adequate anti-wear properties in the "Vickers 35VQ25A" vane pump test and did not pass the "Vickers" M-2950-S standard or "General Motors" LS-2 LH.03.04.06 standard. Comparative Examples 7 and 8 exhibited anti-wear properties sufficient to pass German Standard DIN 51524 (part 2) in the V104C vane pump test, but their anti-wear properties were not sufficient to pass the "Vickers" M-2950-S standard or the "General Motors" LS-2-LH.03.04.06 standard.
As is clear from the compositions shown in Table 3 and the results shown in Table 5, the lubricating oil composition according to the present invention (Working Examples 1 and 2) have excellent anti-wear properties sufficient to pass German Standard DIN 51524 (Part 2) , "Vickers" M-2950-S standard and "General Motors" LS-2 LH.03.04.06 standard, in vane pump tests "Vickers" V104C and 35VQ25A, and their lubricating oil performance is sufficient for use as a hydraulic oil in high-pressure applications. Comparative Example 5 shows increased total wear in both tests when compared to Working Examples 1 and 2.
However, when the additive combination of the present invention is not used (comparative examples) , and in the case of commercial zinc-free hydraulic oils and zinc-based hydraulic oils, the anti-wear properties and extreme-pressure performance are both considerably poorer and there are problems when these oils are used as lubricating oils for modern industrial machines which have been miniaturized and work at high speeds, high pressures and high precision. Comparative Examples 9 and 10
Comparative Examples 9 and 10 were performed in order to see whether the thermal oxidative stability is better when R2 in the β-dithiophosphorylated propionic acid is hydrogen or when it is a methyl group. The composition and results for Comparative Examples 9 and 10 are shown in Table 6. The thermal oxidative stability test was performed as follows: 200 ml of test oils of Comparative Examples 9 and 10, obtained by combining β-dithiophosphorylated propionic acid and antioxidant and rust preventer, were independently introduced into 250 ml beakers, a steel sample and copper sample of diameter 0.6 mm and length 7.6 mm, which had been polished using # 240 alumina polishing paper, washed and dried, were intersected and the test oils were applied thereto, and the test oils were subjected to thermal oxidative deterioration for 336 hours in a 140°C oven, and after the test the test oils were suction-filtered using a 0.8 μm hole diameter filter and the amount of sludge obtained, the external appearance of the copper sample and steel sample and the colour of the test oil (ASTM D1500) were measured.
TABLE 6
Figure imgf000023_0001
*1 Hydrogenated purified base oil B: kinematic viscosity 32 Cst (at 40°C) ,
Sulphur content no greater than 5 ppm, viscosity index 110
*2 Antioxidant: under the trade designation "Irganox
L135" : manufactured by Ciba Speciality Chemicals
*3 Rust preventer: under the trade designation "IRGAMET
39", manufacture by Ciba Speciality Chemicals
As is clear from the results of the thermal oxidative stability tests shown in Table 6, the compound of Comparative Example 10 in which one of the hydrogen atoms on the α-carbon of the β-dithiophosphorylated propionic acid has been substituted by an alkyl group, undergoes less change in colour and produces less sludge, that is, is more stable, than the compound of Comparative Example 9 in which there is no alkyl substitution of the hydrogen atoms on the α-carbon. If there are too many carbon atoms in the alkyl group substitutions on the α- carbon, anti-wear properties deteriorate and so in order to achieve both thermal oxidative stability and anti-wear properties, the alkyl group substituent is most preferably a methyl group . Advantages of the present invention
Lubricating oil compositions of the present invention contain no, or almost no, ash-forming substances such as zinc dialkyl dithiophosphates, in view of environmental and safety considerations; the resulting anti-wear lubricating oil compositions exhibit excellent anti-wear with respect to various machine elements even when used under severe high pressure, high speed and high load conditions. Accordingly, the lubricating oil compositions of the present invention are highly effective in the provision of lubricating oil which can guarantee the reliability of equipment over long periods, in response to the recently developed high speed, high pressure and high precision industrial machines.

Claims

C L A I M S
1. Lubricating oil composition, comprising β- dithiophosphorylated propionic acid (A) , triaryl phosphate (B) and base oil comprising mineral oil and/or synthetic oil.
2. Lubricating oil composition according to Claim 1, wherein the β-dithiophosphorylated propionic acid (A) is represented by the general formula (1) below: -
S=P(-0R1)2SCH2CH(R2)C00H (1) wherein R1, which may be identical or different, represents a branched alkyl group of from 3 to 8 carbon atoms and R2 represents a hydrogen atom or alkyl group of from 1 to 4 carbon atoms .
3. Lubricating oil composition according to Claim 2, where R2 is a methyl group, ethyl group or hydrogen group .
4. Lubricating oil composition according to any one of Claims ' 1 to 3, wherein the β-dithiophosphorylated propionic acid (A) is selected from
3- (O,0-diisopropyldithiophosphoryl) propionic acid, 3- (O,0-diisopropyldithiophosphoryl) -2-methyl-propionic acid, 3- (O,0-diisobutyldithiophosphoryl) -propionic acid and 3- (0,0-diisobutyldithiophosphoryl) -2-methyl-propionic acid.
5. Lubricating oil composition according to any one of Claims 1 to 4, in which from 0.001 to 1.0 % by weight of β-dithiophosphorylated propionic acid (A) is incorporated therein, with respect to the total amount of lubricating oil composition.
6. Lubricating oil composition according to any one of Claims 1 to 5, in which from 0.001 to 0.5% by weight of β-dithiophosphorylated propionic acid (A) is incorporated therein, with respect to the total amount of lubricating oil composition.
7 . Lubricating oil composition according to any one of Claims 1 to 6 , wherein the triaryl phosphate (B) is represented by the general formula (2 ) below: -
0=P ( -0-R3 ) 3 (2) wherein each R3 is, independently, a phenyl group or a phenyl group having alkyl group (s) of from 1 to 9 carbon atoms .
8. Lubricating oil composition according to any one of Claims 1 to 7, in which from 0.05 to 10% by weight of triaryl phosphate (B) is incorporated therein, with respect to the total amount of lubricating oil composition.
9. Lubricating oil composition according to any one of Claims 1 to 8 , in which from 0.05 to 5 % by weight of triaryl phosphate (B) is incorporated therein, with respect to the total amount of lubricating oil composition.
10. Lubricating oil .composition according to any of Claims 1 to 9, which is used as a hydraulic oil composition, a compressor oil composition, a turbine oil composition, a bearing oil composition and/or a gear oil composition.
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US7547666B2 (en) * 2005-12-21 2009-06-16 Chevron U.S.A. Inc. Ashless lubricating oil with high oxidation stability
TW200728447A (en) * 2005-06-23 2007-08-01 Shell Int Research Oxidative stable oil formulation
EP2041250A1 (en) * 2006-07-19 2009-04-01 Shell Internationale Research Maatschappij B.V. Lubricating oil composition
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AU2014245378A1 (en) * 2013-03-29 2015-10-15 Idemitsu Kosan Co.,Ltd. Lubricant oil composition
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CN112646631A (en) * 2020-12-22 2021-04-13 北京元泰达环保科技有限公司 Preparation method of lubricating oil with high oxidation resistance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1347845A (en) * 1970-09-05 1974-02-27 Ciba Geigy Uk Ltd Lubricating compositions containing phosphorodithioate esters
GB1415964A (en) * 1973-01-25 1975-12-03 Exxon Research Engineering Co Anti-wear lubricating composition
EP0098809A2 (en) * 1982-07-09 1984-01-18 Ciba-Geigy Ag Phosphoryl-mercaptocarboxylic-acid salts
US5362419A (en) * 1992-06-02 1994-11-08 Ciba-Geigy Corporation Dithiophosphoric acid derivatives as lubricant additives
US5922657A (en) * 1996-07-15 1999-07-13 Ciba Specialty Chemicals Corporation β-dithiophosphorylated porpionic acid in lubricants
WO2000011122A1 (en) * 1998-08-20 2000-03-02 Shell Internationale Research Maatschappij B.V. Lubricating oil composition useful in hydraulic fluids

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3931023A (en) * 1974-07-22 1976-01-06 Fmc Corporation Triaryl phosphate ester functional fluids
US4333841A (en) * 1978-10-19 1982-06-08 Ciba-Geigy Corporation Dithiophosphate lubricant additives
US4544492A (en) * 1983-05-09 1985-10-01 Ciba-Geigy Corporation Lubricant compositions
CH668265A5 (en) * 1985-09-09 1988-12-15 Lonza Ag METHOD FOR THE PRODUCTION OF LUBRICANTS IN POWDERED TO PASTOESE FORM.
US4834893A (en) * 1987-12-31 1989-05-30 Mobil Oil Corporation Substituted phosphorodithioates and their metal salts as multifunctional additives
US5552067A (en) * 1994-04-22 1996-09-03 Fmc Corporation Thermally stabilizing organic functional fluids in the absence of oxygens
JP4334623B2 (en) * 1996-06-12 2009-09-30 出光興産株式会社 Lubricating oil composition for automatic transmission
US6165950A (en) * 1997-11-26 2000-12-26 Pabu Services, Inc. Phosphate lubricant compositions and metal forming use

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1347845A (en) * 1970-09-05 1974-02-27 Ciba Geigy Uk Ltd Lubricating compositions containing phosphorodithioate esters
GB1415964A (en) * 1973-01-25 1975-12-03 Exxon Research Engineering Co Anti-wear lubricating composition
EP0098809A2 (en) * 1982-07-09 1984-01-18 Ciba-Geigy Ag Phosphoryl-mercaptocarboxylic-acid salts
US5362419A (en) * 1992-06-02 1994-11-08 Ciba-Geigy Corporation Dithiophosphoric acid derivatives as lubricant additives
US5922657A (en) * 1996-07-15 1999-07-13 Ciba Specialty Chemicals Corporation β-dithiophosphorylated porpionic acid in lubricants
WO2000011122A1 (en) * 1998-08-20 2000-03-02 Shell Internationale Research Maatschappij B.V. Lubricating oil composition useful in hydraulic fluids

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004018596A1 (en) * 2002-08-21 2004-03-04 Bp Corporation North America, Inc. Synergistic combination of additive providing high load capacity and corrosion inhibitors for lubricant compositions
US7294607B2 (en) 2002-08-21 2007-11-13 Bp Corporation North America Inc. Synergistic combination of load supplement additive and corrosion inhibitors for lubricant compositions
WO2004113479A1 (en) * 2003-06-18 2004-12-29 The Lubrizol Corporation Lubricating oil composition with antiwear performance
EP1816182A1 (en) * 2004-11-24 2007-08-08 Nippon Oil Corporation Lubricating oil composition
EP1816182A4 (en) * 2004-11-24 2008-04-23 Nippon Oil Corp Lubricating oil composition
US9157046B2 (en) 2004-11-24 2015-10-13 Nippon Oil Corporation Lubricating oil composition
WO2011070140A3 (en) * 2009-12-10 2011-08-25 Shell Internationale Research Maatschappij B.V. Lubricating oil composition
US20150166923A1 (en) * 2012-07-11 2015-06-18 Idemitsu Kosan Co., Ltd Lubricating oil composition
EP2937410A4 (en) * 2012-12-19 2016-07-06 Idemitsu Kosan Co Lubricant oil composition for rotary compressor
CN105087111A (en) * 2014-05-09 2015-11-25 吉坤日矿日石能源株式会社 Lubricant composition
EP3072949A1 (en) * 2015-03-23 2016-09-28 Chevron Japan Ltd. Lubricating oil composition for construction machines
EP3072948A1 (en) * 2015-03-23 2016-09-28 Chevron Japan Ltd. Lubricating oil compositions for construction machines

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