EP1937792A1 - Composition d huile lubrifiante - Google Patents

Composition d huile lubrifiante

Info

Publication number
EP1937792A1
EP1937792A1 EP06807300A EP06807300A EP1937792A1 EP 1937792 A1 EP1937792 A1 EP 1937792A1 EP 06807300 A EP06807300 A EP 06807300A EP 06807300 A EP06807300 A EP 06807300A EP 1937792 A1 EP1937792 A1 EP 1937792A1
Authority
EP
European Patent Office
Prior art keywords
lubricating oil
oil composition
base oils
phenyl
composition according
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Withdrawn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
EP06807300A
Other languages
German (de)
English (en)
Inventor
Nicholas John Bell
Mitsuhiro Nagakari
Peter William Robert Smith
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 BV filed Critical Shell Internationale Research Maatschappij BV
Priority to EP06807300A priority Critical patent/EP1937792A1/fr
Publication of EP1937792A1 publication Critical patent/EP1937792A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • 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
    • C—CHEMISTRY; METALLURGY
    • 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
    • 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
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/06—Well-defined aromatic compounds
    • C10M2203/065—Well-defined aromatic compounds used as base material
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/104—Aromatic fractions
    • C10M2203/1045—Aromatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/17—Fisher Tropsch reaction products
    • C10M2205/173—Fisher Tropsch reaction products used as base material
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/22—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts
    • C10M2205/223—Alkylation reaction products with aromatic type compounds, e.g. Friedel-crafts used as base material
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C—CHEMISTRY; METALLURGY
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C10M2215/065—Phenyl-Naphthyl amines
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/04—Detergent property or dispersant property
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • 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

Definitions

  • the present invention relates to lubricating compositions, more specifically to lubricating compositions for lubricating rotary air compressors.
  • the lubrication of compressors in particular rotary air compressors, can expose the lubricant to high temperature conditions .
  • Lubricating oil compositions for use in such compressors have to meet a combination of requirements in order to satisfactorily lubricate each component. Accordingly, in order that the need for oil changes can be minimised in such compressors, i.e. in order that the oil drain interval is favourable, such lubricating oil compositions must exhibit not only good deposit control, but also good thermal and oxidative stability.
  • WO-A-01/64820 describes a lubricating oil composition comprising a lubricating basestock which comprises a blend of (A) at least one polyalkylene glycol (PAG) and (B) at least one alkyl aromatic compound.
  • said lubricating oil composition can be used as a positive displacement compressor lubricant.
  • WO-A-01/64820 exemplifies lubricating oil compositions comprising a PAG in combination with an alkyl naphthalene and various antioxidants .
  • EP-A-0387979 discloses specific alkyl-substituted diphenylamines as antioxidants, i.e. p,p'- dinonyldiphenylamines .
  • EP-A-0387979 further discloses the use of said antioxidants in lubricating oil compositions comprising mineral oil having an aromatic content of 30% by weight or below and/or synthetic oil containing no aromatic rings in its structural units . That is to say, EP-A-0387979 teaches away from the use of said antioxidants with aromatic lubricant base oils .
  • EP-A-0387979 discloses a composition comprising a p, p' -dinonyldiphenylamine, N-p-dodecylphenyl- ⁇ - naphthylamine, and, as base oil, either a purified mineral oil having an aromatic content of 7% by weight or a poly- oc-olefin oil.
  • base oil either a purified mineral oil having an aromatic content of 7% by weight or a poly- oc-olefin oil.
  • Table 2 of EP-A-0387979 discloses a composition comprising p, p' -branched dinonyldiphenylamine (Ex. 5) and N-p-branched dodecylphenyl- ⁇ -naphthylamine in said purified mineral oil which has an oxidation-inhibiting performance (according to ASTM D2272) of 2154 minutes.
  • Comparative Example 4 in said Table describes a composition comprising p, p' -branched dioctyldiphenylamine and N-p-branched octylphenyl-OC- naphthylamine in said purified mineral oil which has an oxidation-inhibiting performance (according to ASTM D2272) of 2127 minutes.
  • US-B1-6180575 describes lubricating oil compositions which may be used in the lubrication of bearings, gears and in other industrial applications such as in wet clutch systems, cooling gear boxes and rotary screw compressors .
  • Said lubricating oil compositions comprise a base fluid which comprises at least 50 wt . % of a hydrocarbon base fluid; and an additive combination comprising: (1) an adduct of a substituted triazole and a hydrocarbon amine phosphate in an amount below about 5 wt . % of the total composition and (2) a tri-hydrocarbyl phosphate in an amount up to
  • US-B1-6180575 lists an number of conventional additives including viscosity index improvers, antioxidants, anti-wear additives and corrosion inhibitors which may also be present in said lubricating oil compositions. It is of note that whilst US-Bl- 6180575 lists a number of different kinds of antioxidants in the description thereof, the antioxidants are not a critical feature of the Examples in US-B1-6180575 and they are not described in detail therein.
  • Example 3 of US-B1-6180575 is said to be an ISO grade 32 oil comprising 20.00 %wt . C14 alkyl naphthalene, 76.78 %wt . of a mixture of PAO and 0.75 %wt . of an amine antioxidant. Said oil is indicated to have a RBOT value of 1750 minutes according to ASTM D2272.
  • lubricating oil compositions have been surprisingly found which not only exhibit good deposit control, but which also exhibit excellent oxidative and thermal stability.
  • the lubricating oil composition according to the present invention comprises one or more hydrocarbyl- substituted aromatic lubricant base oils in combination with (a) one or more phenyl-naphthylamines and (b) one or more diphenylamines, wherein said lubricating oil composition comprises one or more additional lubricant base oils comprising polyalphaolefins and/or Fischer- Tropsch derived base oils .
  • the lubricating composition according to the present invention can comprise a single compound or a mixture of compounds for each of components (a) and (b) .
  • the one or more phenyl-naphthylamines (a) which are used in the present invention, can be either substituted or non-substituted, or a mixture of both.
  • the one or more phenyl-naphthylamines can be used as such or in the form of a salt. Examples of such phenyl-naphthylamines are phenyl-alpha-naphthylamines and phenyl-beta- naphthylamines .
  • the phenyl-naphthylamine preferably is a phenyl-alpha-naphthylamine .
  • a preferred substituted phenyl-naphthylamine is a mono-alkylated phenyl-alpha-naphthylamine.
  • phenyl-naphthylamines examples include octylphenyl-beta-naphthylamine, t-octylphenyl-alpha-naphthylamine, phenyl-alpha- naphthylamine, phenyl-beta-naphthylamine, phenyl-beta- naphthylamine, p-octylphenyl-alpha-naphthylamine, 4-octylphenyl-l-octyl-beta-naphthylamine, n-t-dodecylphenyl-1-naphthylamine, N-hexylphenyl-2- naphthylamine .
  • a particularly preferred phenyl-alpha- naphthylamine is a monooctylated phenyl alpha- naphthylamine,
  • Another preferred phenyl-naphthylamine is a non- substituted phenyl-alpha-naphthylamine .
  • phenyl- naphthylamines that may be conveniently used in the lubricating oil composition of the present invention include that available from Ciba Specialty Chemicals under the trade designation "IRGANOX L-06".
  • the lubricating oil composition according to the diphenylamines (b) The one or more diphenylamines can be substituted or non-substituted. It is preferred to use a hydrocarbyl-substituted diphenylamine, more preferably an alkyl-substituted diphenylamine. A preferred diphenylamine is 4,4'-dialkyl diphenylamine.
  • the alkyl group preferably contains in the range of from 2 to 15 carbon atoms, more preferably in the range of from 3 to 12 carbon atoms.
  • Preferred diphenylamines include dialkyldiphenylamines such as p, p ' -dioctyl-diphenylamine, p, p ' -di- ⁇ -methylbenzyl-diphenylamine and N-p-butylphenyl- N-p ' -octylphenylamine, monoalkyldiphenylamines such as mono-t-butyldiphenylamine and mono-octyldiphenylamine, bis (dialkylphenyl) amines such as di-(2,4- diethylphenyl) amine and di (2-ethyl-4-nonylphenyl) amine .
  • dialkyldiphenylamines such as p, p ' -dioctyl-diphenylamine, p, p ' -di- ⁇ -methylbenzyl-diphenylamine and N-p-butyl
  • the one or more hydrocarbyl-substituted aromatic lubricant base oils present in the lubricating oil composition of the present invention are preferably alkylated aromatic lubricant base oils, more preferably alkylated aromatic lubricant base oils selected from one or more of alkylated naphthalenes, alkylated benzenes, alkylated diphenyl compounds and alkylated diphenyl methanes.
  • Such base oils are described in US-B1-6180575 and may be conveniently prepared by the methods described therein.
  • the one or more hydrocarbyl- substituted aromatic lubricant base oils essentially consist of compounds which only contain hydrogen and carbon.
  • a limited amount of contaminants such as sulphur more than 80 %wt of the one or more hydrocarbyl- substituted aromatic lubricant base oils consists of compounds consisting of hydrogen and carbon only, more preferably more than 90 %wt .
  • Alkylated naphthalenes are preferred hydrocarbyl- substituted aromatic lubricant base oils for use in the lubricating oil compositions of the present invention.
  • Said alkylated naphthalenes may be mono-, di-, tri or tetra-alkyl substituted naphthalenes such as those desscribed in US-A-5602086, WO-A-03/048275 and WO-A-03/048276.
  • the lubricating oil composition of the present invention comprises one or more additional lubricant base oils comprising polyalphaolefins and/or Fischer-Tropsch derived base oils .
  • polyalphaolefins and their manufacture are well known in the art.
  • Preferred polyalphaolefins that may be used in lubricating oil compositions of the present invention may be derived from C2 to C32 alpha olefins.
  • Particularly preferred feedstocks for said polyalphaolefins are 1- octene, 1-decene, 1-dodecene and 1-tetradecene .
  • polyalphaolefins that may be conveniently used in the lubricating oil compositions of the present invention have a kinematic viscosity at 100 0 C in the range of from 3 to 300 mm 2 /s, more preferably in the range of from 4 to 100 mm ⁇ /s.
  • Fischer-Tropsch derived base oils which may be conveniently used as the one or more additional base oils in the lubricating oil composition of the present invention include, for example, the Fischer-Tropsch derived base oils disclosed in EP-A-776959, EP-A-668342, WO-A-97/21788, WO-A-00/15736 , WO-A-00/14188, WO-A- 00/14187, WO-A-00/14183, WO-A-00/14179, WO-A-00/08115, WO-A-99/41332, EP-A-1029029, WO-A-01/18156 and WO-A- 01/57166.
  • said one or more additional lubricant base oils may further comprise mineral and/or other synthetic lubricant base oils .
  • Such mineral lubricant base oils include liquid petroleum oils and solvent treated or acid treated mineral lubricating oils of the paraffinic, naphthenic, or mixed paraffinic/naphthenic type which may be further refined by hydrocracking and hydrofinishing processes and/or dewaxing.
  • Naphthenic base oils have low viscosity index (VI) (generally 40-80) and a low pour point. Such base oils are produced from feedstocks rich in naphthenes and low in wax content and are used mainly for lubricants in which colour and colour stability are important, and VI and oxidation stability are of secondary importance. Paraffinic base oils have higher VI (generally >95) and a high pour point. Said base oils are produced from feedstocks rich in paraffins, and are used for lubricants in which VI and oxidation stability are important.
  • VI viscosity index
  • Synthetic processes enable molecules to be built from simpler substances or to have their structures modified to give the precise properties required.
  • Other synthetic lubricant base oils which may be present in the one or more additional lubricant base oils include hydrocarbon oils such as polyalkylene glycols (PAGs), polyisobutylenes (PIBs) dibasic acids esters, polyol esters and other complex esters, and dewaxed waxy raffinate.
  • hydrocarbon oils such as polyalkylene glycols (PAGs), polyisobutylenes (PIBs) dibasic acids esters, polyol esters and other complex esters, and dewaxed waxy raffinate.
  • Synthetic hydrocarbon base oils sold by the Shell Group under the designation "XHVI" (trade mark) may
  • Optional additional lubricant base oils are preferably constituted from mineral oils and/or other synthetic base oils which contain more than 80% wt of saturates, more preferably more than 90 % wt., as measured according to ASTM D2007.
  • said optional additional lubricant base oils contain less than 1.0 wt . %, more preferably less than 0.1 wt . % of sulphur, calculated as elemental sulphur and measured according to ASTM D2622, ASTM D4294, ASTM D4927 or ASTM D3120.
  • the viscosity index of said optional additional lubricant base oils is more than 80, more preferably more than 120, as measured according to ASTM D2270.
  • the lubricating oil composition of the present invention has a kinematic viscosity in the range of from 32 to 150 mm ⁇ /s at 40 0 C, more preferably in the range of from 32 to 100 mm ⁇ /s, and most preferably in the range of from 32 to 78 mm ⁇ /s.
  • the amount of the additives (a) and (b) present in the lubricating oil composition of the present invention depends on the specific compounds used therein.
  • the lubricating oil composition of the present invention preferably comprises a total amount in the range of from 0.1 to 5.0 % by weight, more preferably in the range of from 0.2 to 2.0 % by weight of said one or more phenyl-naphthylamines, based on the total weight of the lubricating oil composition.
  • the lubricating oil composition of the present invention preferably comprises a total amount in the range of from 0.1 to 5.0 % by weight, more preferably in the range of from 0.2 to 2.0 % by weight, of said one or more diphenylamines, based on total weight of the lubricating oil composition.
  • hydrocarbyl-substituted aromatic lubricant base oils are preferably present in the lubricating oil composition of the present invention in a total amount in the range of from 0.1 to 30 % by weight, more preferably in the range of from 1 to 20 % by weight, based on the total weight of the lubricating oil composition.
  • the one or more hydrocarbyl-substituted aromatic lubricant base oils preferably comprise less than 60 wt. % of the total lubricant base oil in the lubricating oil composition of the present invention, more preferably less than 25 wt . % of the total lubricant base oil and most preferably in the range of from 1 to 25 wt .% of the total weight of lubricant base oil, wherein the total weight of lubricant base oil is the total weight of the one or more hydrocarbyl-substituted aromatic lubricant base oils and the one or more additional lubricant base oils .
  • the one or more phenyl-naphthylamines (a) and the one or more diphenylamines (b) are present in the lubricating oil composition of the present invention in a weight ratio in the range of from 1:3 to 3:1, more preferably in the range of from 1:2 to 1:1. It is preferred that the lubricating oil composition according to the present invention contains no substantial amount of phenolic antioxidant .
  • the amount of phenolic antioxidant present preferably is less than even more preferably less than 0.1 % by weight, and most preferably 0 % by weight, based on total amount of the lubricating oil composition.
  • the lubricating oil composition of the present invention can further comprise additives such as extreme pressure additives, anti-wear additives, metal passivators, corrosion inhibitors, foam inhibitors and/or demulsifiers .
  • Anti-wear additives that may be conveniently used include zinc dithiophosphate compounds selected from zinc dialkyl-, diaryl- and/or alkylaryl- dithiophosphates, molybdenum-containing compounds, boron-containing compounds and ashless anti-wear additives such as substituted or unsubstituted thiophosphoric acids, and salts thereof.
  • Said anti-wear additives may each be conveniently added to the lubricating oil composition of the present invention in an amount in the range of from 0.1 to 3.0 wt. %, based on the total weight of lubricating oil composition.
  • molybdenum-containing compounds may conveniently include molybdenum dithiocarbamates, trinuclear molybdenum compounds, for example as described in WO-A-98/26030, sulphides of molybdenum and molybdenum dithiophosphate .
  • Boron-containing compounds that may be conveniently used include borate esters, borated fatty amines, borated epoxides, alkali metal (or mixed alkali metal or alkaline earth metal) borates and borated overbased metal salts.
  • Compounds such as alkenyl succinic acid or ester moieties thereof, benzotriazole-based compounds and thiodiazole-based compounds may be conveniently used in the lubricating oil composition of the present invention as corrosion inhibitors.
  • Compounds such as polysiloxanes, dimethyl polycyclohexane and polyacrylates may be conveniently used in the lubricating oil composition of the present invention as foam inhibitors.
  • the present invention further provides the use of the lubricating oil composition according to the present invention for lubricating a rotary air compressor.
  • the lubricating composition according to the present invention can be conveniently prepared by blending together the one or more phenyl-naphthylamines, the one or more diphenylamines, the one or more hydrocarbyl- substituted aromatic lubricant base oils and the one or more additional lubricant base oils comprising polyalphaolefins and/or Fischer-Tropsch derived base oils and, optionally, one or more additives as hereinbefore described.
  • phenyl-naphthylamine (a) used in the formulations of Tables 1 and 2 was that available from Ciba Specialty Chemicals under the trade designations "IRGANOX L-06".
  • the diphenylamine (b) used in the formulations of Tables 1 and 2 was that available from Ciba Specialty Chemicals under the trade designation "IRGANOX L-57”.
  • the hydrocarbyl-substituted aromatic lubricant base oil used in the formulations of Tables 1 and 2 was the alkyl naphthalene available under the trade designation "SYNESSTIC 5" from ExxonMobil.
  • the PAO 40 base oil used in the formulations of Tables 1 and 2 was that available from Innovene under the trade designation "DURASYN 174".
  • PAO 8 base oil used in the formulations of Table 1 was that available from Innovene under the trade designation "DURASYN 168".
  • the GTL 8 base oil used in the formulations of Table 2 was a Fischer-Tropsch derived base oil having a kinematic viscosity at 100 0 C of approx. 8 cSt (IHm 2 S "1 ) .
  • Said base oil may be conveniently manufactured by the process described in WO-A-02/070631.
  • Examples 1 and 2 are according to the present invention whilst the remaining Examples in Tables 1 and 2 are comparative in nature .
  • the formulations in Tables 1 and 2 were subjected to the Rotating Pressure Vessel Oxidation Test (RPVOT) (formerly known as the Rotating Bomb Oxidation Test (RBOT)) (ASTM D2272) in order to measure the oxidative stability thereof.
  • RVOT Rotating Pressure Vessel Oxidation Test
  • RBOT Rotating Bomb Oxidation Test
  • ASTM D2272 Standard D2272
  • said formulations were also tested in a version of the Wolf Strip Test (formerly known as DIN 51392) performed according to the modifications set out below.
  • DIN 51392 formerly measured the tendency of engine oils to produce thermal/oxidative deposits using an inclined metal plate over which the test engine oils were pumped.
  • the volume of oil, pumping rate, plate temperature and test duration specified in said test were
  • test conditions used in the Examples of Tables 1 and 2 were modified to an oil volume of 150 ml, a pumping rate of 50 ml/hour, a plate temperature of 205 0 C and a test duration of 24 hours. It is apparent from Tables 1 and 2 that the formulations in accordance with the present invention not only exhibit good deposit control but also display outstanding performance in the RPVOT.

Abstract

La présente invention concerne une composition d’huile lubrifiante comprenant une ou plusieurs huiles lubrifiantes aromatiques de base substituées par des groupements hydrocarbyle, en association avec (a) une ou plusieurs phényl-naphtylamines et (b) une ou plusieurs diphénylamines, ladite composition d’huile lubrifiante comprenant une ou plusieurs huiles lubrifiantes de base supplémentaires comprenant des polyalphaoléfines et/ou des huiles de base dérivées de Fischer-Tropsch. La présente invention concerne en outre l’utilisation de la composition d’huile lubrifiante pour la lubrification d’un compresseur à air rotatif.
EP06807300A 2005-10-17 2006-10-16 Composition d huile lubrifiante Withdrawn EP1937792A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06807300A EP1937792A1 (fr) 2005-10-17 2006-10-16 Composition d huile lubrifiante

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05256430 2005-10-17
PCT/EP2006/067444 WO2007045629A1 (fr) 2005-10-17 2006-10-16 Composition d’huile lubrifiante
EP06807300A EP1937792A1 (fr) 2005-10-17 2006-10-16 Composition d huile lubrifiante

Publications (1)

Publication Number Publication Date
EP1937792A1 true EP1937792A1 (fr) 2008-07-02

Family

ID=35976497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807300A Withdrawn EP1937792A1 (fr) 2005-10-17 2006-10-16 Composition d huile lubrifiante

Country Status (10)

Country Link
US (1) US20070129268A1 (fr)
EP (1) EP1937792A1 (fr)
JP (1) JP2009511728A (fr)
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JP2009511728A (ja) 2009-03-19
KR20080056019A (ko) 2008-06-19
WO2007045629A1 (fr) 2007-04-26
ZA200803157B (en) 2009-06-24
US20070129268A1 (en) 2007-06-07
WO2007045629A9 (fr) 2008-07-03
CN101310004A (zh) 2008-11-19
CA2626036A1 (fr) 2007-04-26
AU2006303337A1 (en) 2007-04-26

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