EP2864459A1 - Composition de lubrification - Google Patents

Composition de lubrification

Info

Publication number
EP2864459A1
EP2864459A1 EP13729400.5A EP13729400A EP2864459A1 EP 2864459 A1 EP2864459 A1 EP 2864459A1 EP 13729400 A EP13729400 A EP 13729400A EP 2864459 A1 EP2864459 A1 EP 2864459A1
Authority
EP
European Patent Office
Prior art keywords
lubricating composition
carbon atoms
composition according
weight
polyolefin
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.)
Ceased
Application number
EP13729400.5A
Other languages
German (de)
English (en)
Inventor
Malcom J Willars
Richard Thomas Dixon
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 EP13729400.5A priority Critical patent/EP2864459A1/fr
Publication of EP2864459A1 publication Critical patent/EP2864459A1/fr
Ceased legal-status Critical Current

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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
    • C10M169/047—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and macromolecular compounds
    • 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
    • C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
    • 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
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic 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
    • 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
    • C10M2205/024—Propene
    • 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
    • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
    • 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
    • C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
    • 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
    • C10M2205/08—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing non-conjugated dienes
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/086—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type polycarboxylic, e.g. maleic acid
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/011—Cloud point
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/071—Branched chain compounds
    • 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
    • C10N2030/02—Pour-point; Viscosity index
    • 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
    • C10N2030/40—Low content or no content compositions
    • C10N2030/43—Sulfur free or low sulfur content compositions
    • 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
    • C10N2030/40—Low content or no content compositions
    • C10N2030/45—Ash-less or low ash content
    • 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
    • C10N2030/54—Fuel economy
    • 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
    • C10N2030/68—Shear stability
    • 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
    • C10N2030/74—Noack Volatility
    • 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
    • C10N2040/25—Internal-combustion engines

Definitions

  • the present invention relates to a lubricating composition
  • a lubricating composition comprising a base oil and one or more
  • the present invention relates to a lubricating composition
  • a lubricating composition comprising a base oil and one or more additives for use in the crankcase of an engine for providing improved sustained fuel economy in a diesel engine, as well as improved dispersancy and piston cleanliness .
  • Lubricants can play an important role in reducing a vehicle's fuel consumption and there is a continuing need for improvements in fuel economy performance, in particular long term or sustained fuel economy performance, of lubricant compositions contained within an internal combustion engine.
  • US2010/0190671 relates to the use of comb polymers for reducing fuel consumption.
  • the comb polymer disclosed therein comprises, in the main chain, at least one repeat unit which is obtained from at least one polyolefin-based macromonomer , and at least one repeat unit which is obtained from at least one low molecular weight monomer selected from the group consisting of styrene monomers having 8 to 17 carbon atoms,
  • alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group vinyl esters having from 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di) alkyl fumurates having 1 to 10 carbon atoms in the alcohol group,
  • compositions for use in the crankcase of an engine wherein the compositions provide improved dispersancy and piston cleanliness benefits as well as long term or sustained fuel economy benefits.
  • a lubricating composition for use in the crankcase of an engine comprising a base oil and one or more additives, wherein the base oil comprises a Fischer-Tropsch derived base oil and wherein the lubricating composition comprises one or more comb polymers.
  • the lubricating composition of the present invention provides improved dispersancy and improved piston cleanliness in addition to improved long term or sustained fuel economy.
  • a lubricating composition as described herein in the crankcase of an engine, in order to improve sustained fuel economy properties whilst obtaining improved piston cleanliness properties.
  • a lubricating composition in the crankcase of an engine, in order to improve sustained fuel economy properties whilst obtaining improved dispersancy properties.
  • sustained fuel economy means good fuel economy throughout the oil drain interval.
  • a lubricant exhibiting sustained fuel economy has
  • the base oil used in lubricating composition according to the present invention comprises at least a Fischer-Tropsch derived base oil
  • various conventional mineral oils, synthetic oils as well as naturally derived esters such as vegetable oils may be conveniently used.
  • the base oil used in the present invention may - in addition to the Fischer-Tropsch derived base oil - conveniently comprise mixtures of one or more mineral oils and/or one or more synthetic oils; thus, according to the present invention, the term "base oil” may refer to a mixture containing more than one base oil, including at least one Fischer-Tropsch derived base oil.
  • Mineral oils include liquid petroleum oils and solvent-treated or acid-treated mineral lubricating oil of the paraffinic, naphthenic, or mixed paraffinic/naphthenic type which may be further refined by hydrofinishing processes and/or dewaxing.
  • Suitable base oils for use in the lubricating oil composition of the present invention are Group I-III mineral base oils (preferably Group III), Group IV poly- alpha olefins (PAOs), Group II-III Fischer-Tropsch derived base oils (preferably Group III), Group V ester base oils, and mixtures thereof.
  • Group I-III mineral base oils preferably Group III
  • Group IV poly- alpha olefins PAOs
  • Group II-III Fischer-Tropsch derived base oils preferably Group III
  • Group V ester base oils and mixtures thereof.
  • Group I lubricating oil base oils according to the
  • API American Petroleum Institute
  • Fischer-Tropsch derived base oils are known in the art.
  • Fischer-Tropsch derived is meant that a base oil is, or is derived from, a synthesis product of a Fischer-Tropsch process.
  • a Fischer-Tropsch derived base oil may also be referred to as a GTL (Gas-To-Liquids ) base oil.
  • GTL Gas-To-Liquids
  • Suitable Fischer-Tropsch derived base oils that may be conveniently used as the base oil in the lubricating composition of the present invention are those as for example disclosed in EP 0 776 959, EP 0 668 342, WO
  • the aromatics content of a Fischer- Tropsch derived base oil will typically be below 1 wt.%, preferably below
  • the base oil has a total paraffin content of at least 80 wt.%, preferably at least 85, more preferably at least 90, yet more preferably at least 95 and most preferably at least 99 wt.%. It suitably has a saturates content
  • the saturates content of the base oil is greater than 99 wt.%, more preferably greater than 99.5 wt.%. It further preferably has a maximum n-paraffin content of 0.5 wt.%.
  • the base oil preferably also has a content of naphthenic compounds of from 0 to less than 20 wt.%, more preferably of from 0.5 to 10 wt.%.
  • the Fischer-Tropsch derived base oil or base oil blend has a kinematic viscosity at 100°C (as measured by ASTM D 7042) in the range of from 1 to 30 mm 2 /s (cSt), preferably from 1 to 25 mm 2 /s (cSt), and more preferably from 2 mm 2 /s to 12 mm 2 /s.
  • the Fischer-Tropsch derived base oil has a kinematic viscosity at 100°C (as measured by ASTM D 7042) of at least 2.5 mm 2 /s, more preferably at least 3.0 mm 2 /s.
  • the Fischer- Tropsch derived base oil has a kinematic viscosity at 100°C of at most 5.0 mm 2 /s, preferably at most 4.5 mm 2 /s, more preferably at most 4.2 mm 2 /s (e.g. "GTL 4") .
  • the Fischer- Tropsch derived base oil has a kinematic viscosity at 100°C of at most 5.0 mm 2 /s, preferably at most 4.5 mm 2 /s, more preferably at most 4.2 mm 2 /s (e.g. "GTL 4") .
  • the Fischer-T kinematic viscosity at 100°C of at most 5.0 mm 2 /s, preferably at most 4.5 mm 2 /s, more preferably at most 4.2 mm 2 /s (e.g. "GTL 4") .
  • the Fischer-T kinematic viscosity at 100°C of at most 5.0 mm 2 /s, preferably at most 4.5
  • Tropsch derived base oil has a kinematic viscosity at 100°C of at most 8.5 mm 2 /s, preferably at most 8 mm 2 /s (e.g. "GTL 8") .
  • the Fischer-Tropsch derived base oil typically has a kinematic viscosity at 40°C (as measured by ASTM D 7042) of from 10 to 100 mm 2 /s (cSt), preferably from 15 to 50 mm 2 /s.
  • the flash point (as measured by ASTM D92) of the Fischer-Tropsch derived base oil is preferably greater than 120°C, more preferably even greater than 140°C.
  • the Fischer-Tropsch derived base oil preferably has a viscosity index (according to ASTM D 2270) in the range of from 100 to 200.
  • the Fischer-Tropsch derived base oil has a viscosity index of at least 125, preferably 130. Also it is preferred that the viscosity index is below 180, preferably below 150.
  • Fischer-Tropsch derived base oil contains a blend of two or more Fischer-Tropsch derived base oils
  • the above values apply to the blend of the two or more Fischer-Tropsch derived base oils.
  • the lubricating oil composition preferably comprises 80 wt% or greater of Fischer-Tropsch derived base oil.
  • Synthetic oils include hydrocarbon oils such as olefin oligomers (including polyalphaolefin base oils;
  • PAOs dibasic acid esters, polyol esters, polyalkylene glycols (PAGs), alkyl naphthalenes and dewaxed waxy isomerates.
  • PAGs polyalkylene glycols
  • alkyl naphthalenes alkyl naphthalenes
  • dewaxed waxy isomerates Synthetic hydrocarbon base oils sold by the Shell Group under the designation "Shell XHVI" (trade mark) may be conveniently used.
  • PAOs Poly-alpha olefin base oils
  • Preferred poly- alpha olefin base oils that may be used in the lubricating compositions of the present invention may be derived from linear C2 to C32, preferably C6 to Ci6, alpha olefins.
  • Particularly preferred feedstocks for said poly-alpha olefins are 1-octene, 1-decene, 1-dodecene and 1- tetradecene.
  • the base oil contains more than 50 wt.%, preferably more than 60 wt.%, more preferably more than 70 wt.%, even more preferably more than 80 wt.%. most preferably more than 90 wt.% Fischer-Tropsch derived base oil.
  • not more than 5 wt.%, preferably not more than 2 wt.%, of the base oil is not a Fischer-Tropsch derived base oil. It is even more preferred that 100 wt% of the base oil is based on one or more Fischer-Tropsch derived base oils.
  • the total amount of base oil incorporated in the lubricating composition of the present invention is preferably in the range of from 60 to 99 wt.%, more preferably in the range of from 65 to 90 wt.% and most preferably in the range of from 70 to 85 wt.%, with respect to the total weight of the lubricating
  • the base oil (or base oil blend) as used according to the present invention has a kinematic viscosity at 100°C (according to ASTM D445) of above 2.5 cSt and below 5.6 cSt . According to a preferred
  • the base oil has a kinematic viscosity at 100°C (according to ASTM D445) of between 3.5 and 4.5 cSt .
  • the base oil contains a blend of two or more base oils, it is
  • the blend has a kinematic viscosity at 100°C of between 3.5 and 4.5 cSt .
  • lubricating compositions of the present invention would be utilised in, but not
  • SAE J300 viscosity grades are published, with lower viscosities than the current OW-20, the present invention would also be very much applicable to these new viscosity lower grades. It is conceivable that the present invention could also be used with higher viscosity grades.
  • the lubricating composition according to the present invention preferably has a Noack volatility (according to ASTM D 5800) of below 15 wt . % .
  • the Noack volatility (according to ASTM D 5800) of the composition is between 1 and 15 wt.%, preferably below 14.6 wt . % and more preferably below 14.0 wt.%.
  • the lubricating composition according to the present invention comprises one or more comb polymers, preferably in a solid polymer amount of from 0.1 wt% to 10 wt%, more preferably from 0.25 wt% to 7 wt%, and even more
  • the comb polymer comprises, in the main chain, at least one repeat unit which is obtained from at least one polyolefin-based macromonomer, and at least one repeat unit which is obtained from at least one low molecular weight monomer selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having from 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di) alkyl fumurates having 1 to 10 carbon atoms in the alcohol group,
  • the comb polymer used herein has 8% to 30% by weight of repeat units which are derived from polyolefin-based macromonomers, and the molar degree of branching of the comb polymer is in the range of 0.3% to 1.1%.
  • comb polymer as used herein means that relatively long side chains are bonded to a polymeric main chain, frequently also known as the backbone.
  • the comb polymers used in the present invention have at least one repeat unit which is derived from polyolefin-based macromonomers . The exact proportion is evident via the molar degree of branching.
  • main chain as used herein does not necessarily mean that the chain length of the main chain is greater than that of the side chains. Instead, this term relates to the composition of this chain.
  • the side chain has very high proportions of olefinic repeat units, especially units which are derived from alkenes or alkadienes, for example ethylene, propylene, n-butene, isobutene, butadiene, isoprene
  • the main chain comprises relatively large proportions of polar unsaturated monomers which have been detailed above .
  • the term "repeat unit" is known to those skilled in the art.
  • the present comb polymers can be obtained by a process which involves the free-radical polymerisation of macromonomers and low molecular weight monomers, wherein double bonds are opened up to form covalent bonds.
  • the repeat unit arises from the monomers used.
  • the comb polymers can also be prepared by polymer-analagous reactions and graft copolymerisation .
  • the converted repeat unit of the main chain is counted as a repeat unit which is derived from a polyolefin-based macromonomer .
  • the comb polymers used in the present invention comprise repeat units which are derived from polyolefin- based macromonomers. These repeat units comprise at least one group which is derived from polyolefins.
  • Suitable polyolefins include C2-C 10 alkenes, such as ethylene, propylene, n-butene, isobutene, norbornene, and/or C4-C 10 alkadienes such as butadiene, isoprene, norbornadiene, and the like.
  • the repeat units derived from polyolefin-based macromonomers preferably comprise at least 70% by weight and more preferably at least 80% by weight and most preferably at least 90% by weight of groups which are derived from alkene and/or alkadienes, based on the weight of the repeat units derived from polyolefin-based macromonomers .
  • the polyolefinic groups may also be present in hydrogenated form.
  • the repeat units derived from polyolefin-based macromonomers may comprise further groups.
  • copolymerizable monomers including among others, alkyl (meth) acrylates, styrene monomers, fumurates, maleates, vinyl esters and/or vinyl ethers.
  • alkyl (meth) acrylates including butyl (meth) acrylates, styrene monomers, fumurates, maleates, vinyl esters and/or vinyl ethers.
  • the proportion of these groups based on copolymerizable monomers is
  • the repeat units derived from polyolefin-based macromonomers may comprise start groups and/or end groups which serve from functionalization or are caused by the preparation of the repeat units derived from polyolefin-based macromonomers.
  • the proportion of these start groups and/or end groups is preferably at most 30% by weight, more preferably at most 15% by weight, based on the weight of the repeat units derived from polyolefin-based macromonomers.
  • macromonomers is preferably in the range from 500 to 50000g/mol, more preferably from 700 to lOOOOg/mol, even more preferably from 1500 to 4900 g/mol and most
  • the melting point of the repeat units derived from the polyolefin-based macromonomers is preferably less than or equal to -10°C, more preferably less than or equal to -20°C, even more preferably less than or equal to -40°C, as measured by DSC. Most preferably, no DSC melting point can be measured for the repeat units derived from the polyolefin-based macromonomers.
  • the comb In addition to the repeat units which are derived from the polyolefin-based macromonomers, the comb
  • polymers used in the present invention comprise repeat units which are derived from low molecular weight
  • styrene monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms,
  • alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, di (alkyl) fumurates having 1 to 10 carbon atoms in the alcohol group, (di) alkyl maleates having 1 to 10 carbon atoms in the alcohol group, and mixtures of these monomers.
  • the molecular weight of the low molecular weight repeat units or of the low molecular weight monomers is preferably at most 400g/mol, more preferably at most 200 g/mol and most preferably at most 150g/mol.
  • styrene monomers having 8 to 17 carbon atoms are styrene, substituted styrenes having an alkyl substituent in the side chain, for example, alpha-methyl- styrene and alpha-ethyl-styrene, substituted styrenes having an alkyl substituent on the ring, such as
  • vinyltoluene p-methylstyrene halogenated styrenes, for example monochlorostyrenes , dichlorostyrenes ,
  • (meth) acrylates encompasses acrylates and methacrylates , and also mixtures of acrylates and
  • the alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group include (meth) acrylates which are derived from saturated alcohols, such as methyl (meth) acrylate, ethyl (meth) acrylate, n- propyl (meth) acrylate, isopropyl (meth) acrylate, n- butyl (meth) acrylate, tert-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, 2-ethyl- hexyl (meth) acrylate, heptyl (meth) acrylate, 2-tert- butylheptyl (meth) acrylate, octyl (meth) acrylate, 3- isopropylheptyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, methyl
  • (meth) acrylate allyl (meth) acrylate, vinyl (meth) acrylate, oleyl (meth) acrylate; cycloalkyl (meth) acrylates such as cyclpentyl (meth) acrylate, and 3- vinylcyclohexyl (meth) acrylate .
  • Preferred alkyl (meth) acrylates include 1 to 8, more preferably 1 to 4 carbon atoms in the alcohol group.
  • the alcohol group here may be linear or branched.
  • vinyl esters having 1 to 11 carbon atoms in the acyl group include vinyl formate, vinyl acetate, vinyl propionate, vinyl butyrate.
  • Preferred vinyl esters include 2 to 9, more preferably 2 to 5 carbon atoms in the acyl group.
  • the acyl group may be linear or
  • vinyl ethers having 1 to 10 carbon atoms in the alcohol group examples include vinyl methyl ether, vinyl ethyl ether, vinyl propyl ether, vinyl butyl ether.
  • Preferred vinyl ethers include 1 to 8, more preferably 1 to 4 carbon atoms in the alcohol group.
  • the alcohol group may be linear or branched.
  • (di) ester as used herein means that monoesters, diesters and mixtures of esters, especially of fumaric acid and/or of maleic acid may be used.
  • the (di) alkyl fumurates having 1 to 10 carbon atoms in the alcohol group include monomethyl fumurate, dimethyl fumurate, monoethyl fumurate, diethyl fumurate, methyl ethyl fumurate, monobutyl fumurate, dibutyl fumurate, dipentyl fumurate and dihexyl fumurate.
  • Preferred (di)alkyl fumurates comprise 1 to 8, more preferably 1 to 4, carbon atoms in the alcohol group.
  • the alcohol group may be linear or branched.
  • the di(alkyl) maleates having 1 to 10 carbon atoms in the alcohol group include monomethyl maleate, dimethyl maleate, monoethyl maleate, diethyl maleate, methyl ethyl maleate, monobutyl maleate, dibutyl maleate.
  • Preferred (di)alkyl maleates comprise 1 to 8, more preferably 1 to 4 carbon atoms in the alcohol group.
  • the alcohol group herein may be linear or branched.
  • the comb polymers used herein may comprise further repeat units which are derived from further comonomers, their proportion being at most 20% by weight, preferably at most 10% by weight and more preferably at most 5% by weight, based on the weight of the repeat units.
  • These also include repeat units which are derived from alkyl (meth) acrylates having 11 to 30 carbon atoms in the alcohol group, especially undecyl (meth) acrylate, 5- methylundecyl (meth) acrylate, dodecyl (meth) acrylate, 2- methyldodecyl (meth) acrylate, tridecyl (meth) acrylate, 5- methyltridecyl (meth) acrylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, 2- methylhexadecyl (meth) acrylate, heptadecyl (meth) acrylate, 5-isopropylheptadecyl (meth) acrylate, 4-tert- butyloctadecyl (meth) acrylate, 5- ethyloctadecy
  • octadecyl (meth) acrylate nonadecyl (meth) acrylate, eicosyl (meth) acrylate, cetyleicosyl (meth) acrylate, stearyleicosyl (meth) acrylate, docosyl (meth) acrylate and/or eicosyltetratriacontyl (meth) acrylate.
  • repeat units which are derived from dispersing oxygen- and nitrogen-functionalized monomers such as those listed in paragraphs [0036] - [0059] of US2010/0190671, incorporated herein by
  • the comb polymers used herein preferably have a molar degree of branching in the range of from 0.1 to 10 mol%, more preferably from 0.3 to 6 mol%, even more preferably from 0.3 to 1.1 mol%, especially from 0.4 to 1.0 mol% and most preferably from 0.4 to 0.6 mol%.
  • the molar degree of branching of the comb polymers f b r a n ch is calculated by the formula:
  • A is the number of types of repeat units which are derived from polyolefin-based macromonomers
  • B is the number of types of repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di) alkyl fumurates having 1 to 10 carbon atoms in the alcohol group,
  • n a is the number of repeat units which are derived from polyolefin-based macromonomers of the type a in the comb polymer molecule
  • n b is the number of repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di) alkyl fumurates having 1 to 10 carbon atoms in the alcohol group,
  • the molar degree of branching arises generally from the ratio of the monomers used if the comb polymer has been prepared by copolymerization of low molecular weight and macromolecular monomers. For the calculation, it is possible here to use the number-average molecular weight of the macromonomer .
  • the molar degree of branching is found by known methods of determining the conversion.
  • alkyl maleates having 1 to 10 carbon atoms in the alcohol group, and mixtures of these monomers, and of repeat units which are derived from polyolefin-based macromonomers is based on the weight of the repeat units.
  • polymers generally also comprise start groups and end groups which can form through initiation reactions and termination reactions.
  • start groups and end groups which can form through initiation reactions and termination reactions.
  • alkyl (meth) acrylates having 1 to 10 carbon atoms in the alcohol group
  • vinyl esters having 1 to 11 carbon atoms in the acyl group
  • vinyl ethers having 1 to 10 carbon atoms in the alcohol group
  • alkyl fumurates having 1 to 10 carbon atoms in the alcohol group
  • alkyl maleates having 1 to 10 carbon atoms in the alcohol group and mixtures of these monomers, and of repeat units which are derived from polyolefin-based macromonomers, is based on the weight of the comb
  • the comb polymer used herein preferably has 8 to 30% by weight, more preferably 10 to 26% by weight, of repeat units which are derived from polyolefin-based
  • Preferred comb polymers for use herein include those which have a weight average molecular weight Mw in the range of 500,000 to 1 , 000 , 00 Og/mol , more preferably
  • the number-average molecular weight Mn may be any number-average molecular weight.
  • the comb polymers used herein have a polydipersity index Mw/Mn in the range of 1 to 5, more preferably in the range of from 2.5 to 4.5.
  • the number average and the weight average molecular weight can be determined by known processes such as Gas Permeation
  • the comb polymer has a low proportion of olefinic double bonds.
  • the iodine number is preferably less than or equal to 0.2g per g of comb polymer, more preferably less than or equal to 0. lg per g of comb polymer. This proportion can be determined according to DIN 53241 after drawing off carrier oil and low molecular weight residual monomers at 180°C under reduced pressure for 24 hours.
  • the proportion of repeat units which are derived from n- butyl methacrylate and/or from n-butyl acrylate is at least 50% by weight, more preferably at least 60% by weight, based on the total weight of repeat units.
  • the comb polymer has repeat units which are derived from styrene.
  • the proportion of repeat units which are derived from styrene are preferably in the range of 0.1 to 30% by weight, more preferably 5 to 25% by weight.
  • the comb polymers have repeat units which are derived from
  • alkyl (meth) acrylate having 11-30 carbon atoms in the alkyl radical, preferably in an amount in the range of
  • the comb polymer has repeat units which are derived from styrene and repeat units which are derived from n-butyl methacrylate.
  • the weight ratio of styrene repeat units and n- butylmethacrylate repeat units is preferably in the range of 1:1 to 1:9, more preferably 1:2 to 1:8.
  • the comb polymer has repeat units which are derived from methyl
  • methacrylate and repeat units which are derived from n- butyl methacrylate, preferably in a weight ratio of 1:1 to 0:100, more preferably 3:7 to 0:100.
  • a commercially available comb polymer suitable for use herein is available from Evonik under the tradename Viscoplex 3-201.
  • the lubricating composition according to the present invention further comprises one or more additives such as anti-oxidants , anti-wear additives, dispersants,
  • Anti-oxidants that may be conveniently used include phenyl-naphthylamines (such as "IRGANOX L-06" available from Ciba Specialty Chemicals) and diphenylamines (such as "IRGANOX L-57” available from Ciba Specialty
  • Anti-wear additives that may be conveniently used include zinc-containing compounds such as 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.
  • molybdenum-containing compounds may conveniently include molybdenum dithiocarbamates , trinuclear molybdenum compounds, for example as described in WO 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.
  • the dispersant used is preferably an ashless
  • ashless dispersants are polybutylene succinimide polyamines and Mannich base type dispersants .
  • the detergent used is preferably an overbased
  • detergent or detergent mixture containing e.g. salicylate, sulphonate and/or phenate-type detergents.
  • viscosity index improvers which may conveniently be used in the lubricating composition of the present invention include the styrene-butadiene stellate copolymers, styrene-isoprene stellate copolymers and the polymethacrylate copolymer and ethylene-propylene
  • Dispersant- viscosity index improvers may be used in the lubricating composition of the present invention.
  • the composition according to the present invention contains less than 1.0 wt.%, preferably less than 0.5 wt.%, of a Viscosity Index improver concentrate (i.e. VI improver plus "carrier oil” or "diluent”) , based on the total weight of the composition.
  • a Viscosity Index improver concentrate i.e. VI improver plus "carrier oil” or "diluent
  • the composition is free of Viscosity Index improver
  • Viscosity Modifier as used hereafter (such as in Table 2) is meant to be the same as the above-mentioned term “Viscosity Index improver concentrate” .
  • the composition contains at least 0.1 wt.% of a pour point depressant.
  • a pour point depressant alkylated naphthalene and phenolic polymers, polymethacrylates, maleate/fumarate copolymer esters may be conveniently used as effective pour point depressants.
  • compounds such as alkenyl succinic acid or ester moieties thereof, benzotriazole-based compounds and thiodiazole-based compounds may be conveniently used in the lubricating composition of the present invention as corrosion inhibitors.
  • polycyclohexane and polyacrylates may be conveniently used in the lubricating composition of the present invention as defoaming agents.
  • seal fix or seal compatibility agents include, for example, commercially available aromatic esters.
  • inventions may be conveniently prepared by admixing the comb polymer with the base oil(s), and one or more additives .
  • the above-mentioned additives are typically present in an amount in the range of from 0.01 to 35.0 wt.%, based on the total weight of the lubricating composition, preferably in an amount in the range of from 0.05 to 25.0 wt.%, more preferably from 1.0 to 20.0 wt.%, based on the total weight of the lubricating composition.
  • the composition contains at least 9.0 wt.%, preferably at least 10.0 wt.%, more preferably at least 11.0 wt% of an additive package comprising an anti- wear additive, a metal detergent, an ashless dispersant and an anti-oxidant .
  • PCMO Passenger Car Motor Oil
  • a sulphated ash content (according to ASTM D 874) of up to 0.5 wt.%, up to 0.8 wt.% and up to 1.5 wt.%,
  • a phosphorus content (according to ASTM D 5185) of up to 0.05 wt.%, up to 0.08 wt.% and typically up to 0.1 wt.%, respectively;
  • a sulphated ash content (according to ASTM D 874) of up to 1 wt.%, up to 1 wt.% and up to 2 wt.%, respectively; a phosphorus content (according to ASTM D 5185) of up to 0.08 wt.% (low SAPS) and up to 0.12 wt.% (mid SAPS), respectively; and
  • a sulphur content (according to ASTM D 5185) of up to 0.3 wt.% (low SAPS) and up to 0.4 wt . % (mid SAPS), respectively .
  • the present invention provides the use of a lubricating composition according to the present invention as an engine oil in the crankcase of an engine, in order to improve sustained fuel economy properties whilst also improving dispersancy and piston cleanliness properties.
  • the engine oil may include a heavy duty diesel engine oil, a passenger car motor engine oil, as well as other types of engine oils.
  • Table 1 indicates the properties for the base oils used.
  • Table 2 indicates the composition and properties of the fully formulated engine oil formulations that were tested; the amounts of the components are given in wt.%, based on the total weight of the fully formulated
  • Base oil 1 was a commercially available Group III base oils having a kinematic viscosity at 100°C (ASTM D445) of 4.2 cSt (average value) .
  • Base oil 1 is
  • Base oil 2 was a commercially available Group III base oils having a kinematic viscosity at 100°C (ASTM D445) of 6.5 cSt (average value) .
  • Base oil 2 is
  • Base oil 3 was a Fischer-Tropsch derived base oil (“GTL 4”) having a kinematic viscosity at 100°C (ASTM
  • This GTL 4 base oil may be conveniently manufactured by the process described in e.g. WO 02/070631, the teaching of which is hereby incorporated by reference.
  • Base oil 4" was a Fischer-Tropsch derived base oil
  • GTL 8 having a kinematic viscosity at 100°C (ASTM D445) of approx. 8 cSt (mm 2 s _1 ) .
  • This GTL 8 base oil may be conveniently manufactured by the process described in e.g. WO 02/070631, the teaching of which is hereby incorporated by reference.
  • All tested engine oil formulations contained a combination of a base oil, a comb polymer (or other
  • Viscosity Modifier in the case of Comparative Example 1 an additive package, optionally a pour point depressant, and optionally a friction modifier which additive package was the same in all tested compositions.
  • the additive package was a so-called “mid SAPS” (medium sulphated ash, phosphorus and sulphur)
  • the additive package contained a combination of additives including anti-oxidants , a zinc-based anti-wear additive, an ashless dispersant, an overbased detergent mixture and about 10 ppm of an anti-foaming agent.
  • the comb polymer was a commercially available comb polymer available from Evonik under the tradename
  • the pour point depressant in Comparative Example 1 was Viscoplex 6-054 which is a dispersant PMA commercially available from Evonik.
  • the viscosity modifier in Comparative Example 1 was a conventional styrene-hydrogenated isoprene co-polymer viscosity modifier concentrate, commercially available from Infineum under the trade designation "SV 201".
  • the friction modifier was a conventional friction modifier, commercially available from Lubrizol under the tradename LZ8621.
  • compositions of the Examples and the Comparative Examples were obtained by mixing the base oils with the other components, using conventional lubricant blending procedures .

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  • Lubricants (AREA)

Abstract

La présente invention concerne une composition de lubrification, à utiliser dans le carter d'un moteur, qui comprend une huile de base et un ou plusieurs additifs. L'huile de base comprend une huile de base dérivée de Fischer-Tropsch et la composition de lubrification comprend un ou plusieurs polymères en peigne. Il a été découvert que la composition de lubrification de l'invention améliore les propriétés durables d'économie d'énergie, tout en obtenant des propriétés améliorées de propreté du piston et de dispersion.
EP13729400.5A 2012-06-21 2013-06-18 Composition de lubrification Ceased EP2864459A1 (fr)

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RU2015101726A (ru) 2016-08-10
BR112014031498A2 (pt) 2017-06-27
CN104471042A (zh) 2015-03-25

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