EP2077316A2 - Schmiermittelzusammensetzungen mit niedrigem HTHS für einen vorgegebenen SAE-Viskositätsgrad - Google Patents
Schmiermittelzusammensetzungen mit niedrigem HTHS für einen vorgegebenen SAE-Viskositätsgrad Download PDFInfo
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- EP2077316A2 EP2077316A2 EP08105939A EP08105939A EP2077316A2 EP 2077316 A2 EP2077316 A2 EP 2077316A2 EP 08105939 A EP08105939 A EP 08105939A EP 08105939 A EP08105939 A EP 08105939A EP 2077316 A2 EP2077316 A2 EP 2077316A2
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- lubricant composition
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- viscosity
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Classifications
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- 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
- C10M157/00—Lubricating compositions characterised by the additive being a mixture of two or more macromolecular compounds covered by more than one of the main groups C10M143/00 - C10M155/00, each of these compounds being essential
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- 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
- C10M143/00—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation
- C10M143/10—Lubricating compositions characterised by the additive being a macromolecular hydrocarbon or such hydrocarbon modified by oxidation containing aromatic monomer, e.g. styrene
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- 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
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- 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
- C10N2020/019—Shear stability
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- 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
- C10N2020/02—Viscosity; Viscosity index
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- 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
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- 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 lubricant compositions which exhibit certain performance characteristics; particularly a low High-Temperature, High-Sheer viscosity measurement.
- Lubricant compositions are well known in the art. Lubricant compositions are typically made up of base oil and various additives. Lubricant compositions must meet specific performance characteristics such as, but not limited to, kinematic viscosity and High-Temperature, High-Shear viscosity measurement (HTHS), depending on their end use.
- kinematic viscosity and High-Temperature High-Temperature
- HTHS High-Shear viscosity measurement
- the present invention provides a lubricant composition
- a lubricant composition comprising base oil having a viscosity index equal to or greater than 120 that exhibits an HTHS at or near the minimum for its SAE Viscosity Grade.
- the present invention provides a lubricant composition
- a lubricant composition comprising: a first polymer having a kinematic viscosity ratio, as defined herein, of less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent; and a base oil having a viscosity index equal to or greater than 120.
- SSI shear stability index
- the lubricant composition comprises: a polymer having a kinematic viscosity ratio less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent; and a base oil having a viscosity index equal to or greater than 120, wherein the concentration of phosphorus in the lubricant composition is less than 0.08 weight percent and the concentration of sulfur is less than 0.5 weight percent.
- SSI shear stability index
- the lubricant composition comprises an automotive lubricating oil composition, more especially an automotive lubricating oil composition for use in piston engines, especially gasoline (spark-ignited) and diesel (compression-ignited), crankcase lubrication, such compositions being referred to as crankcase lubricants.
- the present invention provides a method of lubricating a compression-ignited or spark-ignited combustion engine, comprising operating the engine with a lubricant composition according to the first aspect of the invention.
- the method according to the second aspect of the present invention comprises lubricating the crankcase of a compression-ignited or spark-ignited internal combustion engine.
- the present invention provides the use, in a lubricant composition, of: (a) a base oil having a viscosity index equal to or greater than 120; and, (b) a first polymer having a kinematic viscosity ratio of less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent, to enhance the fuel economy performance characteristics of the lubricant composition.
- a base oil having a viscosity index equal to or greater than 120
- SSI shear stability index
- the present invention provides the use, in a lubricant composition, of: (a) a base oil having a viscosity index equal to or greater than 120; and, (b) a first polymer having a kinematic viscosity ratio of less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent, to reduce the High-Temperature, High Shear (HTHS) viscosity measurement of the lubricant composition, as measured in accordance with the ASTM D4741 at 150°C.
- SSI shear stability index
- the HTHS of the lubricant composition is reduced to substantially the minimum value specified for the SAE Viscosity Grade of the lubricant composition as stated in accordance with SAE J300 Engine Oil Viscosity Classification.
- lubricant composition as used herein represents a “lubricating oil composition”.
- a stated range of "1 to 10" should be considered to include any and all subranges between (and inclusive of) the minimum value of 1 and the maximum value of 10; that is, all subranges beginning with a minimum value of 1 or more and ending with a maximum value of 10 or less, e.g., 5.5 to 10.
- the polymer in solution is prepared by diluting the viscosity modifier concentrate in an API Group I solvent neutral 100 base stock between 60°C and 70°C for 45 minutes.
- the kv100 and kv150 are measured according to ASTM D445.
- Table 1 below shows the composition of three different polymer concentrates in solution as used herein as well as the kv100, kv150 and the kinematic viscosity ratios of the polymer solutions.
- the three polymer concentrates are commercially available.
- Polymer Concentrate 1 is commercially available from Infineum USA as SV145;
- Polymer Concentrate 2 is commercially available from Infineum USA as SV265;
- Polymer Concentrate 3 is commercially available from Chevron Corporation as Paratone 8451.
- the lubricant composition comprises a base oil having a viscosity index ranging of equal to or greater than 120 and a first polymer having a kinematic viscosity ratio less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent.
- SSI shear stability index
- the base oil comprises a Group III basestock.
- Group III basestocks contain greater than or equal to 90 percent saturates and less than or equal to 0.03 percent sulfur and have a viscosity index greater than or equal to 120.
- the base oil comprises a Group IV basestock.
- the base oil comprises a Group III basestock and a Group IV basestock.
- the base oil comprises Group IV and Group V basestocks.
- the base oil comprises Group II, Group IV and Group V basestocks.
- the basestock is made using gas-to-liquids (“GTL”) process.
- GTL gas-to-liquids
- GTL is a refinery process used to convert natural gas or other gaseous hydrocarbons into longer-chain hydrocarbons.
- GTL can be used to convert methane-rich gases into liquid fuels either via direct conversion or via syngas as an intermediate using the Fischer Tropsch process.
- isomerization catalyst can be used with GTL to make Group III basestock.
- the lubricant composition comprises at least one polymer (a "first polymer") having a kinematic viscosity ratio less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent, for example, equal to or greater than 35 percent or equal to or greater than 45 percent.
- first polymer having a kinematic viscosity ratio less than or equal to 0.25 and a shear stability index (SSI) equal to or greater than 20 percent, for example, equal to or greater than 35 percent or equal to or greater than 45 percent.
- SSI shear stability index
- the first polymer comprises a minimum of 5 weight percent styrene.
- the first polymer has a thickening efficiency (TE) equal to or greater than 2.0, for example, equal to or greater than 2.4 or equal to or greater than 2.8.
- TE thickening efficiency
- Suitable first polymers comprise a normal block copolymer (i.e., true block copolymer) or a random block copolymer.
- the normal block copolymer can be made from (1) conjugated dienes having from 4 to 10 carbon atoms, for example, from 4 to 6 carbon atoms or (2) from vinyl substituted aromatics having from 8 to 12 carbon atoms, for example, 8 or 9 carbon atoms.
- Suitable block copolymers include block copolymers made from conjugated dienes and/or vinyl substituted aromatics, particularly conjugated dienes and/or vinyl substituted aromatics as defined herein.
- the block copolymer is made from conjugated dienes.
- Suitable conjugated dienes include piperylene, 2,3-dimethyl-1,3-butadiene, chloroprene, isoprene and 1,3-butadiene, with isoprene and 1,3-butadiene being particularly preferred. Mixtures of such conjugated dienes are useful.
- the block copolymer is made from vinyl substituted aromatics.
- Suitable vinyl substituted aromatics include styrene, alpha-methylstyrene, orthomethylstyrene, meta-methylstyrene, para-methylstyrene, para-tertiary-butylstyrene.
- the normal block copolymers has a total of from 2 to 5, for example, from 2 or 3, polymer blocks of the vinyl substituted aromatic and the conjugated diene with at least one polymer block of said vinyl substituted aromatic and at least one polymer block of said conjugated diene being present.
- the conjugated diene block is hydrogenated as more fully set forth hereinbelow.
- the normal block copolymers can be linear block copolymers wherein a substantially long sequence of one monomeric unit (Block I) is linked with another substantially long sequence of a second (Block II), third (Block III), fourth (Block IV), or fifth (Block V) monomeric unit.
- Suitable copolymers are disclosed in US 5,429,758 .
- the vinyl substituted aromatic content of these copolymers is in the range of from 20 percent to 70 percent by weight, for example, from 40 percent to 60 percent by weight.
- the aliphatic conjugated diene content (i.e., the total diene block content) of these copolymers is in the range of from 30 percent to 80 percent by weight, for example, from 40 percent to 60 percent by weight.
- the described normal block copolymers can be prepared by conventional methods which are well known in the art.
- the copolymers may be prepared by anionic polymerization using, for example, an alkali metal hydrocarbon (e.g., sec-butyllithium) as a polymerization catalyst.
- an alkali metal hydrocarbon e.g., sec-butyllithium
- Infineum SV140 is a hydrogenated styrene-isoprene block available from Infineum U.S.A (Linden, NJ).
- the polymers will be introduced into lubricant compositions in the form of a concentrate as is well known in the art.
- Concentrates comprise one or more components in oil.
- Typical concentrates contain from 3 to 25 weight percent of the polymer.
- the lubricant composition comprises more than one polymer, namely, the composition comprises a first polymer as described above and a "second polymer".
- the second polymer include, but are not limited to, olefin polymers such as polybutene; hydrogenated polymers and copolymers and terpolymers of styrene with isoprene and/or butadiene; polymers of alkyl acrylates or alkyl methacrylates; copolymers of alkyl methacrylates with N-vinyl pyrrolidone or dimethylaminoalkyl methacrylate; post-grafted polymers of ethylenepropylene with an active monomer such as maleic anhydride; styrene-maleic anhydride polymers post-reacted with alcohols and amines. These can be used to provide the desired viscosity in the lubricant composition.
- the lubricant compositions for specific SAE Viscosity Grades exhibit lower HTHS values closer to the minimum HTHS than conventional lubricant compositions for that Grade.
- the minimum HTHS for a 5W30 lubricant composition is 2.9. See Table 2 below for the SAE Engine Oil Viscosity Requirements Classifications which include minimum HTHS requirements. Table 2.
- ASTM D5293 (4) ASTM D4684: Note that the presence of any yield stress detectable by this method constitutes a failure regardless of viscosity. (5) ASTM D445 (6) ASTM D4683, CEC L-36-A-90 (ASTM D4741) or D5481 " Reprinted with permission from SAE J300 ⁇ 1999 Society of Automotive Engineers, Inc.”
- the lubricant composition of the present invention encompasses different SAE J300 viscosity grades.
- the lubricant composition of the present invention satisfies the requirements for SAE J300 viscosity grade 0W-X or 5W-X where X is 10, 20, 30 or 40.
- the lubricant composition comprises a detergent inhibitor package.
- the detergent inhibitor package comprises one or more of the following: metal or ash-containing detergents, antioxidants, anti-wear agents, rust inhibitors, anti-foaming agents, demulsifiers, pour point depressants, etc.
- Metal-containing or ash-forming detergents function both as detergents to reduce or remove deposits and as acid neutralizers or rust inhibitors, thereby reducing wear and corrosion and extending engine life.
- Detergents generally comprise a polar head with a long hydrophobic tail, with the polar head comprising a metal salt of an acidic organic compound.
- the salts may contain a substantially stoichiometric amount of the metal in which case they are usually described as normal or neutral salts, and would typically have a total base number or TBN (as may be measured by ASTM D2896) of from 0 to 80. It is possible to include large amounts of a metal base by reacting an excess of a metal compound such as an oxide or hydroxide with an acidic gas such as carbon dioxide.
- the resulting overbased detergent comprises neutralised detergent as the outer layer of a metal base (e.g. carbonate) micelle.
- Such overbased detergents may have a TBN of 150 or greater, and typically of from 250 to 450 or more.
- Detergents that can be used include oil-soluble neutral and overbased sulfonates, phenates, sulfurized phenates, thiophosphonates, salicylates, and naphthenates and other oil-soluble carboxylates of a metal, particularly the alkali or alkaline earth metals, e.g., sodium, potassium, lithium, calcium, and magnesium (With the constraints noted herein).
- a metal particularly the alkali or alkaline earth metals, e.g., sodium, potassium, lithium, calcium, and magnesium (With the constraints noted herein).
- the most commonly used metals are calcium and magnesium, which may both be present in detergents used in a lubricant, and mixtures of calcium and/or magnesium with sodium.
- Common metal detergents include overbased calcium sulfonates having a TBN greater than or equal to 250, for example, a TBN from 250 to 450; neutral and overbased calcium phenates having a TBN greater than or equal to 50; and sulfurized phenates having a TBN greater than or equal to 50.
- Sulfonates can be prepared from sulfonic acids which are typically obtained by the sulfonation of alkyl substituted aromatic hydrocarbons such as those obtained from the fractionation of petroleum or by the alkylation of aromatic hydrocarbons. Examples include those obtained by alkylating benzene, toluene, xylene, naphthalene, diphenyl or their halogen derivatives such as chlorobenzene, chlorotoluene and chloronaphthalene.
- the alkylation can be carried out in the presence of a catalyst with alkylating agents having from 3 to more than 70 carbon atoms.
- the alkaryl sulfonates usually contain from 9 to 80 or more carbon atoms per alkyl substituted aromatic moiety.
- the oil soluble sulfonates or alkyl aryl sulfonic acids can be neutralized with oxides, hydroxides, alkoxides, carbonates, carboxylate, sulfides, hydrosulfides, nitrates, borates and ethers of the metal.
- the amount of metal compound is chosen having regard to the desired TBN of the final product but typically ranges from 100 to 220 wt. percent of the stoichiometrically required.
- Dihydrocarbyl dithiophosphate metal salts are frequently used as anti-wear and antioxidant agents.
- the metal can be an alkali or alkaline earth metal, or aluminum, lead, tin, molybdenum, manganese, nickel or copper.
- the zinc salts are typically used in lubricating oil in amounts of 0.1 to 10 wt. percent, for example, from 0.2 to 2 wt. percent, based upon the total weight of the lubricating oil composition. They can be prepared in accordance with known techniques by first forming a dihydrocarbyl dithiophosphoric acid (DDPA), usually by reaction of one or more alcohol or a phenol with P 2 S 5 and then neutralizing the formed DDPA with a zinc compound.
- DDPA dihydrocarbyl dithiophosphoric acid
- a dithiophosphoric acid can be made by reacting mixtures of primary and secondary alcohols.
- multiple dithiophosphoric acids can be prepared where the hydrocarbyl groups on one are entirely secondary in character and the hydrocarbyl groups on the others are entirely primary in character.
- any basic or neutral zinc compound could be used but the oxides, hydroxides and carbonates are most generally employed.
- Commercial additives frequently contain an excess of zinc due to use of an excess of the basic zinc compound in the neutralization reaction.
- Zinc dihydrocarbyl dithiophosphates are oil soluble salts of dihydrocarbyl dithiophosphoric acids and may be represented by the following formula: wherein R and R' may be the same or different hydrocarbyl radicals containing from 1 to 18, for example, from 2 to 12, carbon atoms and including radicals such as alkyl, alkenyl, aryl, arylalkyl, alkaryl and cycloaliphatic radicals.
- R and R' groups are alkyl groups of 2 to 8 carbon atoms.
- the radicals can, for example, be ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, amyl, n-hexyl, i-hexyl, n-octyl, decyl, dodecyl, octadecyl, 2-ethylhexyl, phenyl, butylphenyl, cyclohexyl, methylcyclopentyl, propenyl, butenyl.
- the total number of carbon atoms (i.e. R and R') in the dithiophosphoric acid will generally be 5 or greater.
- the zinc dihydrocarbyl dithiophosphate can therefore comprise zinc dialkyl dithiophosphates. Conveniently at least 50 (mole) percent of the alcohols used to introduce hydrocarbyl groups into the dithiophosphoric acids are secondary alcohols.
- the alcohols used to introduce the hydrocarbyl groups can be more than 60 mole percent secondary or more than 90 mole percent secondary.
- Metal dithiophosphates that are secondary in character give better wear control in tests such as the Sequence VE (ASTM D5302) and the GM 6.2L tests.
- the high levels of nitrogenous TBN required by the present invention to control soot related viscosity may increase wear and corrosion performance.
- Oxidation inhibitors or antioxidants reduce the tendency of mineral oils to deteriorate in service which deterioration can be evidence by the products of oxidation such as sludge and varnish-like deposits on the metal surfaces and by viscosity growth.
- Oxidation inhibitors include hindered phenols, oil soluble phenates and sulfurized phenates, phosphosulfurized or sulfurized hydrocarbons, phosphorous esters, metal thiocarbamates, oil soluble copper compounds as described in U.S. Pat. No. 4,867,890 , and molybdenum containing compounds. Such compounds are utilized within the constraints noted herein.
- the lubricant includes at least 0.0008 mole percent hindered phenol antioxidant.
- hindered phenols are oil soluble phenols substituted at one or both ortho positions.
- Suitable compounds include monohydric and mononuclear phenols such as 2,6-di-tertiary alkylphenols (e.g. 2,6 di-t-butylphenol, 2,4,6 tri-t-butyl phenol, 2-t-butyl phenol, 4-alkyl, 2,6, t-butyl phenol, 2,6 di-isopropylphenol, and 2,6 dimethyl, 4 t-butyl phenol).
- hindered phenols include polyhydric and polynuclear phenols such as alkylene bridged hindered phenols (4,4 methylenebis(6 tert butyl-o-cresol), 4,4'-methylenebis(2-tert-amyl-o-cresol), and 2,2'-methylenebis (2,6-di-t-butylphenol).
- alkylene bridged hindered phenols (4,4 methylenebis(6 tert butyl-o-cresol), 4,4'-methylenebis(2-tert-amyl-o-cresol), and 2,2'-methylenebis (2,6-di-t-butylphenol).
- the hindered phenol can be borated or sulfurized.
- Rust inhibitors selected from the group consisting of nonionic polyoxyalkylene polyols and esters thereof, polyoxyalkylene phenols, and anionic alkyl sulfonic acids can be used.
- Copper and lead bearing corrosion inhibitors can be used.
- such compounds are thiadiazole polysulfides containing from 5 to 50 carbon atoms, their derivatives and polymers thereof.
- Derivatives of 1, 3, 4 thiadiazoles such as those described in U.S. Pat. Nos. 2,719,125 ; 2,719,126 ; and 3,087,932 ; are typical.
- Other similar materials are described in U.S. Pat. Nos. 3,821,236 ; 3,904,537 ; 4,097,387 ; 4,107,059 ; 4,136,043 ; 4,188,299 ; and 4,193,882 .
- additives are the thio and polythio sulfenamides of thiadiazoles such as those described in UK. Patent Specification No. 1,560,830 .
- Benzotriazoles derivatives also fall within this class of additives. When these compounds are included in the lubricant composition, they are typically present in an amount not exceeding 0.2 wt. percent active ingredient.
- a small amount of a demulsifying component can be used.
- a suitable demulsifying component is described in EP 330,522 . It is obtained by reacting an alkylene oxide with an adduct obtained by reacting a bis-epoxide with a polyhydric alcohol. A treat rate of 0.001 to 0.05 mass percent active ingredient is typical.
- pour point depressants otherwise known as lube oil flow improvers, lower the minimum temperature at which the fluid will flow or can be poured.
- Such additives are well known. Typical of those additives which improve the low temperature fluidity of the fluid are C 8 to C 18 dialkyl fumarate/vinyl acetate copolymers and polyalkylmethacrylates. Likewise, dialkyl fumarate and vinyl acetate can be used as compatibilizing agents.
- Foam control can be provided by many compounds including an antifoamant of the polysiloxane type, for example, silicone oil or polydimethyl siloxane.
- additives can provide a multiplicity of effects; thus for example, a single additive can act as a dispersant-oxidation inhibitor. This approach is well known and does not require further elaboration. It is important to note that addition of the other components noted above must comply with the limitations set forth herein.
- the lubricant composition comprises one or more ashless dispersants.
- the ashless dispersants can include the polyalkenyl or borated polyalkenyl succinimide where the alkenyl group is derived from a C 3 -C 4 olefin, especially polyisobutenyl having a number average molecular weight of about 700 to 5,000.
- Other well known dispersants include the oil soluble polyol esters of hydrocarbon substituted succinic anhydride, e.g. polyisobutenyl succinic anhydride, and the oil soluble oxazoline and lactone oxazoline dispersants derived from hydrocarbon substituted succinic anhydride and di-substituted amino alcohols.
- the lubricant composition contains 0.5 to 5 wt. percent of ashless dispersant.
- the lubricant composition comprises ashless detergent.
- ashless detergents and dispersants are so called despite the fact that, depending on their constitution, they may upon combustion yield a non-volatile material such as boric oxide or phosphorus pentoxide; however, they do not ordinarily contain metal and therefore do not yield a metal-containing ash on combustion.
- Many types are known in the art, and are suitable for use in lubricating compositions. These include the following:
- the detergent inhibitor package can contain phosphorus, sulfur, chlorine, ash, etc.
- the lubricant composition comprises less than 0.08 weight percent of phosphorus.
- the lubricant composition comprises less than 0.5 weight percent of sulfur.
- the lubricant composition comprises less than 150 PPM, for example, less than 50 PPM of chlorine.
- the lubricant composition comprises 0.35 to 2 mass percent of ash.
- Examples 1-12 illustrate the present invention.
- Various concentrates made by blending a first polymer concentrate and a commercially available SN 100 Group I base stock at a temperature between 60°C and 70°C for 45 minutes were used to formulate the different examples.
- Different first polymer concentrates, Polymer Concentrates 1-3 were used to formulate the different examples.
- Polymer Concentrate 1 is commercially available from Infineum USA as SV145;
- Polymer Concentrate 2 is commercially available from Infineum USA as SV265;
- Polymer Concentrate 3 is commercially available from Chevron Corporation as Paratone 8451.
- the kinematic viscosity ratios and the shear stability indices (SSI) of the first polymer concentrates used in the examples are shown in Table 12.
- Component 1 is a detergent inhibitor package commercially available from Infineum USA as P5224;
- Component 2 is a pour point depressant commercially available from Infineum USA as V385; and
- Component 3 is a detergent inhibitor package commercially available from Infineum USA as P6000.
- Examples 1-3 are representative of 5W20 lubricant compositions. Compositional information for Examples 1-3 is shown in Table 3. Examples 4-6 are representative of 5W30 lubricant compositions. Compositional information for Examples 1-3 is shown in Table 5. Examples 7-9 are representative of 0W30 PAO lubricant compositions. Compositional information for Examples 7-9 is shown in Table 7. Examples 10-12 are representative of 0W20 PAO lubricant compositions. Compositional information for Examples 10-19 is shown in Table 9.
- the kinematic viscosity of the exemplary compositions was measured at 100°C and 150°C was measured according to ASTM D445.
- the HTHS of the lubricant compositions were made according to ASTM D4741. Results for the various examples are shown in Tables 4, 6, 8 and 10. Table 3.
- Compositional Information for Exemplary 5W20 Lubricants Component Ex. 1 [wt%] Ex. 2 [wt%] Ex. 3 [wt%] Component 1 9.60 9.60 9.60 9.60 Basestock 1 38.36 39.31 39.95 Basestock 2 46.90 47.90 46.63 Polymer Concentrate 1 4.93 0.00 0.00 Polymer Concentrate 2 0.00 2.99 0.00 Polymer Concentrate 3 0.00 0.00 3.61 Component 2 0.20 0.20 0.20 Table 4.
- Examples 1-3 are illustrative of 5W20 lubricant compositions with Example 1 being illustrative of the present invention. As expected, Example 1 has the lowest HTHS of the exemplary 5W20 lubricant compositions. Table 5. Compositional Information for Exemplary 5W30 Ultra Lubricants Component Ex. 4 [wt%] Ex. 5 [wt%] Ex. 6 [wt%] Component 1 9.60 9.60 9.60 Basestock 1 30.85 32.68 32.12 Basestock 2 50.35 52.00 51.64 Polymer Concentrate 1 9.00 0.00 0.00 Polymer Concentrate 2 0.00 5.52 0.00 Polymer Concentrate 3 0.00 0.00 6.44 Component 2 0.20 0.20 0.20 Table 6. Performance Information for Exemplary 5W30 Ultra Lubricants Ex. 4 Ex. 5 Ex. 6 kv100 [cSt] 10.82 10.81 10.86 CCS at -30°C [cp] 6250 6510 6470 HTHS at 150°C [cp] 2.93 3.12 3.22
- Examples 4-6 are illustrative of 5W30 lubricant compositions with Example 4 being illustrative of the present invention. As expected, Example 4 has the lowest HTHS of the exemplary 5W30 lubricant compositions. Table 7. Compositional Information for Exemplary 0W30 PAO Lubricants Component Ex. 7 [wt%] Ex. 8 [wt%] Ex. 9 [wt%] Component 3 12.00 12.00 12.00 Polymer Concentrate 1 9.71 0.00 0.00 Polymer Concentrate 2 0.00 6.09 0.00 Polymer Concentrate 3 0.00 0.00 6.91 Basestock 7 2.00 2.00 2.00 Basestock 5 45.05 48.26 47.55 Basestock 6 31.04 31.45 31.34 Component 2 0.20 0.20 0.20 Table 8.
- Examples 7-9 are illustrative of 0W30 PAO lubricant compositions with Example 7 being illustrative of the present invention. As expected, Example 7 has the lowest HTHS of the exemplary 5W30 PAO lubricant compositions. Table 9. Compositional Information for Exemplary 0W20 PAO Lubricants Component Ex. 10 [wt%] Ex. 11 [wt%] Ex.
- Examples 10-12 are illustrative of 0W20 PAO lubricant compositions with Example 10 being illustrative of the present invention. As expected, Example 10 has the lowest HTHS of the exemplary 5W20 PAO lubricant compositions. Table 11. Viscosities of the Basestocks Basestock kv at 40°C kv at 100°C VI Basestock 1 19.70 4.26 125 Basestock 2 44.49 7.36 130 Basestock 3 19.64 4.03 103 Basestock 4 54.95 7.69 104 Basestock 5 17.61 3.98 126 Basestock 6 47.44 7.95 139 Basestock 7 18.79 4.26 138 Table 12. Description of Polymer Concentrates 1-3 Kinematic Viscosity Ratio Shear Stability Index [%] Polymer Concentrate 1 0.15 52.8 Polymer Concentrate 2 0.41 7.0 Polymer Concentrate 3 0.39 49.7
- the shear stability indices of the Polymer Concentrates in Table 12 were determined according to ASTM D6278 using polymer solutions prepared by blending Polymer Concentrates 1, 2 and 3, respectively, and a Group I basestock having a kv100 of 4.70 cSt.
- the kv100 of the solution was 15.0 ⁇ 0.2 cSt.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/957,627 US20090156442A1 (en) | 2007-12-17 | 2007-12-17 | Lubricant Compositions With Low HTHS for a Given SAE Viscosity Grade |
Publications (2)
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EP2077316A2 true EP2077316A2 (de) | 2009-07-08 |
EP2077316A3 EP2077316A3 (de) | 2011-12-21 |
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US (1) | US20090156442A1 (de) |
EP (1) | EP2077316A3 (de) |
JP (1) | JP2009144162A (de) |
KR (1) | KR20090065449A (de) |
CN (1) | CN101463286A (de) |
AU (1) | AU2008258192B2 (de) |
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Cited By (1)
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WO2014031508A1 (en) * | 2012-08-20 | 2014-02-27 | The Lubrizol Corporation | Lubricating composition including esterified copolymer and diene rubber polymer |
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EP2154230A1 (de) * | 2008-08-08 | 2010-02-17 | Afton Chemical Corporation | Schmiermittelzusatzzusammensetzungen mit verbesserten Eigenschaften zur Steigerung des Viskositätsindex |
CN103468347B (zh) * | 2013-08-03 | 2016-04-27 | 深圳昆油石化技术有限公司 | 一种重组型润滑油粘度指数改进剂 |
US11505761B2 (en) * | 2020-09-17 | 2022-11-22 | Exxon Mobil Technology and Engineering Company | Diluent oils for viscosity modifiers and additive packages |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014031508A1 (en) * | 2012-08-20 | 2014-02-27 | The Lubrizol Corporation | Lubricating composition including esterified copolymer and diene rubber polymer |
Also Published As
Publication number | Publication date |
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CA2646858A1 (en) | 2009-06-17 |
EP2077316A3 (de) | 2011-12-21 |
KR20090065449A (ko) | 2009-06-22 |
CN101463286A (zh) | 2009-06-24 |
AU2008258192B2 (en) | 2013-01-10 |
SG153772A1 (en) | 2009-07-29 |
JP2009144162A (ja) | 2009-07-02 |
US20090156442A1 (en) | 2009-06-18 |
AU2008258192A1 (en) | 2009-07-02 |
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