CN104946353A - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
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- CN104946353A CN104946353A CN201410116638.1A CN201410116638A CN104946353A CN 104946353 A CN104946353 A CN 104946353A CN 201410116638 A CN201410116638 A CN 201410116638A CN 104946353 A CN104946353 A CN 104946353A
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Abstract
The invention provides a lubricating oil composition. The lubricating oil composition for internal combustion engines has both fuel consumption lowering performance for the internal combustion engines, particularly the internal combustion engines equipped with turbochargers, and coking reduction performance for the turbochargers. The lubricating oil composition is characterized in that base oil contains (A) a high-alkalinity phenolate detergent with a base number higher than 100mgKOH/g, (B) a sulfonate detergent with a base number lower than 150mgKOH/g and (C) zinc dithiophosphate and meets a condition (i) and a condition (ii) as follows: [M] is not smaller than 1,100 (i), and [M]+2*[P] is not smaller than 2,600 (ii), wherein [M] represents the amount of metal (mass ppm) from the ingredient (A) and the ingredient (B) in the lubricating oil composition, and [P] represents the amount of phosphorus (mass ppm) from the ingredient (C) in the lubricating oil composition.
Description
Technical field
The present invention relates to lubricating oil composition.Specifically, relate to the suitable lubricating oil composition as lubricating oil for IC engines, the lubricant composition for internal combustion engine of turbo-supercharger is particularly installed.
Background technology
In recent years, for automobile, there is the various requirements such as the small-sized high output of engine, oil consumption savingization, waste gas restriction correspondence, as corresponding 1 method that these require, by a lot of for the situation that supercharging blower, especially turbo-supercharger are installed to engine.
On the other hand, cut down from the view point of the output of environmental problem in recent years, especially carbonic acid gas, the oil consumption savingization of automobile is a major issue, for this reason, and the research lightweight of automobile, the improvement of burning and the low frictionization of engine, the exploitation/improvement etc. of drivetrain device.Such as, in the low frictionization of engine, advance the improvement of the valve train structure of mechanism of changeable air valve system etc., the number of piston ring (piston ring) reduce, the improvement from material aspect of the surface irregularity minimizing of sliding component etc., and the application of engine oil is saved in lean combustion engine, the exploitation of fuel direct-injection engine, the installation of turbo-supercharger, oil consumption.
By installing turbo-supercharger thus efficiency can improving output well, but then, turbo-supercharger is exposed in high-temperature residual heat, therefore produces oil deterioration, particularly causes the danger being caused producing coking (Deposit) by the coking of the oil in turbo-supercharger.Particularly, at a high speed, after the running of an engine that makes to be provided with turbo-supercharger under high capacity, when emergent stopping engine and the heat soak-back of turbo-supercharger (Heat soak back) time, turbo-side wall temperature becomes more than 300 DEG C, in turbo-supercharger, therefore easily cause the coking of engine oil.Its result, produces the stream obturation of oil, floating bearing (floating metal) sintering; Or the coking to be produced by coking enters between floating bearing and axle, the motion of floating bearing is made to become abnormal, in addition or floating bearing is worn away, or turbine blade, compressor blade (compressor vane) contact the faults such as breakage occurs with cover (Casing).
Therefore, as being provided with the engine oil used in the engine of turbo-supercharger, seek heat/excellent oxidation stability and the engine oil of also not easily coking under high temperature more than 300 DEG C.
As the engine oil that can suppress coking significantly, such as, Patent Document 1 discloses, the kinematic viscosity at coordinating 100 DEG C is the multi-stage engine oil of the specific high viscosity base oil of basic wet goods of 16 ~ 45cSt.But under not coordinating specific high viscosity basis oil condition, coking is obvious, extremely difficult suppression coking.In addition, as lubricating oil suitable in the engine being provided with turbo-supercharger, Patent Document 2 discloses, be selected from the base oil of at least a kind in organic acid acetic, alkyl diphenyl base ether, coordinating the lubricating oil composition of the excellent wear resistance of phosphorus system anti-wear agent and benzotriazole or benzotriazole derivatives with specified proportion.But, coking is suppressed to study.Describe in patent documentation 3, in lubricant base, be added with metal-salt or the base number maintenance of amine salt, metal system sanitising agent, ashless dispersant, antioxidant etc., the lubricant composition for internal combustion engine of high-temperature cleaning excellence of the metal-salt of specific thiophosphatephosphorothioate or phosphoric acid ester, specifically phosphorodithioate.But, in the document also unexposed or enlightenment about the anti-cokeability of engine being provided with turbo-supercharger.
In order to property is saved in the oil consumption improving engine oil, be effective for the lowering viscousity that reduces the base oil of viscous resistance with coordinating the low friction compound such as molybdenum dithiocarbamate (MoDTC) of the friction reduced under boundary lubrication.Among low friction compound, MoDTC is the most effective additive, and the engine oil of the known MoDTC of being combined with has high oil consumption saving property.
But when reporting with high density cooperation MoDTC, the coking amount under high temperature significantly increases (non-patent literature 1).Therefore, as the lubricating oil composition of engine being provided with turbo-supercharger, in the past, utilize the material being combined with MoDT can not have oil consumption concurrently and save property and turbine coking performance.
Prior art document
Patent documentation
Patent documentation 1: Japanese Laid-Open Patent Publication 59-122595 publication
Patent documentation 2: Japanese Unexamined Patent Publication 8-259980 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2002-294271 publication
Non-patent literature
Non-patent literature 1: automotive engineering can collect 153-20085146 by front brush by disquisition in 2008
Summary of the invention
the problem that invention will solve
The object of the present invention is to provide, oil engine can be had concurrently, the lubricating oil composition of the oil consumption saving property in the oil engine of turbo-supercharger and the coking minimizing property in turbo-supercharger is especially installed.
for the scheme of dealing with problems
The present inventor etc. further investigate for foregoing problems, and result completes the present invention.
Namely, the present invention relates to a kind of lubricating oil composition, it is characterized in that, containing the high alkalinity phenates system sanitising agent of (A) more than base number 100mgKOH/g, sulfonate system's sanitising agent of (B) below base number 150mgKOH/g and (C) zinc dithiophosphate in base oil, meet following condition (i) and (ii).
[M]≥1100(i)
[M]+2×[P]≥2600(ii)
(in formula, [M] represents the amount of metal (quality ppm) from (A) composition and (B) composition in lubricating oil composition, [P] represents the phosphorus amount (quality ppm) from (C) composition in lubricating oil composition.)
the effect of invention
Lubricating oil composition of the present invention can reach in oil engine high oil consumption save property, particularly in the oil engine possessing the turbo-supercharger be in most cases exposed in high temperature, can have concurrently high oil consumption save property and effective coking suppress.
Embodiment
Below, the present invention is described in detail.
Be not particularly limited as the base oil in lubricating oil composition of the present invention, the material usually used can be used.Such as, mineral oil or synthetic oil can be listed.
As mineral oil, such as, the atmospheric resids obtained by crude oil atmospheric distillation can be listed carry out underpressure distillation and carry out more than a kind of the process such as desolventizing, solvent extraction, hydrocracking, solvent dewaxing, hydrofinishing to obtained lubricating oil distillate and refine the product obtained; Or wax isomerization mineral oil, Fischer-Tropsch method (Fischer-Tropsch process) etc. will be utilized and mineral oil system base oil that the GTL wax (Gas to liquid wax) that manufactures utilizes isomerized technology to manufacture.
As synthetic oil, such as, poly-alpha olefins (ethylene-propylene copolymer, polybutene, 1-octene oligomers, 1-decene oligopolymer and their hydride etc.) can be exemplified; Alkylbenzene, alkylnaphthalene, monoesters (butyl stearate, octyl laurate); Diester (pentanedioic acid double tridecyl ester, hexanodioic acid two (2-ethylhexyl) ester, diisodecyl adipate, hexanodioic acid double tridecyl ester, sebacic acid two (2-ethylhexyl) ester etc.); Polyester (trimellitate etc.); Polyol ester (trimethylolpropane caprylate, TriMethylolPropane(TMP) pelargonate, tetramethylolmethane-2-ethylhexanoate, tetramethylolmethane pelargonate etc.); Polyether polyols; Polyphenylene ether; Dialkyl diphenyl ether; Phosphoric acid ester (tricresyl phosphate etc.); Fluorochemicals (PFPE, fluorinated polyolefin etc.); Silicone oil; To the synthetic wax that obtain and/or wax (slack wax preferably obtained by the solvent dewaxing operation) isomerization obtained by petroleum refinement operation, hydrogenation and the high-performance hydrocarbon base oil that obtains such as be reacted by FT; Such for terpenes is derived from natural unsaturated hydrocarbons hydrogenation and the hydrocarbon base wet goods obtained.
As the base oil of lubricating oil composition of the present invention, can be used alone above-mentioned base oil, also can combine two or more.
Kinematic viscosity at 100 DEG C of base oil is not particularly limited, and is preferably 5.0mm
2/ more than s, be more preferably 6.5mm
2/ more than s, more preferably 8.5mm
2/ more than s, be particularly preferably 9.0mm
2/ more than s.On the other hand, 20.0mm is preferably
2/ below s, be more preferably 15.0mm
2/ below s, more preferably 12.0mm
2/ below s.
Kinematic viscosity at 100 DEG C of base oil is lower than 5.0mm
2/ s lower than time, exist the oil film of lubricating place formed insufficient thus oilness deterioration, in addition, the vaporization losses of base oil becomes large worry.On the other hand, this kinematic viscosity is more than 20.0mm
2during/s, oil consumption save property and turbo-supercharger in coking reduce property worsen.
It should be noted that, the kinematic viscosity in the present invention at so-called 100 DEG C means the kinematic viscosity at 100 DEG C of defined in JISK2283.
The viscosity index of base oil is not particularly limited, and is preferably more than 90, is more preferably more than 100, more preferably more than 120.Particularly preferably use the material of normal paraffin, slack wax, GTL wax etc. or the such viscosity index about 135 ~ 180 of the isomeric alkane hydrocarbon system mineral oil that their isomerization obtained.Viscosity index lower than 90 time, exist oil consumption save property and turbo-supercharger in coking reduce property worsen worry.
It should be noted that, in the present invention, so-called viscosity index means the viscosity index specified in JIS K2283.
Total aromatic component of base oil is not particularly limited, and is preferably below 1.0 quality %, is more preferably below 0.5 quality %, more preferably below 0.3 quality %.Total aromatic component is more than oxidative stability deterioration during 1.0 quality %.On the other hand, total aromatic component also can be 0 quality %, is preferably more than 0.05 quality % with the deliquescent viewpoint of additive.
It should be noted that, in the present invention, so-called total aromatic component means aromatic fraction (aromatic fraction) content measured based on ASTM D2549.
Base oil sulphur content is not particularly limited, and is preferably below 1.0 quality %, is more preferably below 0.5 quality %, more preferably below 0.2 quality %.
It should be noted that, in the present invention, so-called sulphur content means the sulphur content measured based on JIS K2541-1996.
Lubricating oil composition of the present invention contains the high alkalinity phenates system sanitising agent of more than base number 100mgKOH/g as (A) composition.
As high alkalinity phenates system sanitising agent, such as, an alkali metal salt of alkylphenol sulfide or the high alkalinity salt of alkaline earth salt can be listed.
The carbon number of alkyl is generally 8 ~ 30, is preferably 12 ~ 20.Carbon number lower than 8 time, there is the worry of the solvability deterioration for base oil, when carbon number is greater than 30, exist be difficult to manufacture and the worry of thermotolerance deterioration.
As basic metal or alkaline-earth metal, such as, sodium, potassium, magnesium, barium, calcium can be listed, preferably magnesium or calcium, particularly preferably calcium.
(A) base number of composition is more than 100mgKOH/g, is preferably more than 150mgKOH/g, is more preferably more than 250mgKOH/g.On the other hand, be preferably below 450mgKOH/g, be more preferably below 350mgKOH/g.When base number is lower than 100mgKOH/g, there is the worry of turbine coking penalty, during more than 450mgKOH/g, there is the worry that solvability has problems.
It should be noted that, in the present invention, so-called base number means the base number based on perchloric acid method of mensuration according to 7. of JIS K2501 " petroleum product and lubricating oil-neutralization value test method(s) ".
(A) the metal ratio of composition is not particularly limited, preferably more than 1, more preferably more than 2, further preferably more than 2.5, on the other hand, preferably less than 20, more preferably less than 15, further preferably less than 10.
It should be noted that, in the present invention, metal represents than valence mumber × metal element content (% by mole)/soap base content (% by mole) by metallic element, and metallic element means calcium, magnesium etc., and soap base means sulfonic group, phenolic group, salicyl etc.
(A) content of composition is not particularly limited, and converts and is preferably more than 500 quality ppm, is more preferably more than 1000 quality ppm, more preferably more than 2000 quality ppm in total composition benchmark and with amount of metal.On the other hand, be preferably below 10000 quality ppm, be more preferably below 5000 quality ppm, more preferably below 4000 quality ppm.
When content is lower than 500 quality ppm, there is the worry that can not obtain required spatter property and sour neutrality, during more than 10000 quality ppm, there is the worry that excessive metal ingredient is piled up.
Lubricating oil composition of the present invention contains the sulfonate system sanitising agent of below base number 150mgKOH/g as (B) composition.
As sulfonate system sanitising agent, such as, an alkali metal salt or the alkaline earth salt of the alkyl aryl sulfonate by the alkyl aromatic compound sulfonation of weight-average molecular weight 300 ~ 1500, preferably 400 ~ 700 being obtained can be used.
As alkyl aryl sulfonate, such as, so-called mahogany acid, synthesis sulfonic acid can be listed.Usually can list the alkyl aromatic compound sulfonation at the lubricating oil distillate by mineral oil as mahogany acid and obtain material, manufacture whiteruss time by-product so-called mahogany acid etc.As synthesis sulfonic acid, such as, can list having straight-chain, the alkylbenzene of alkyl of branched carries out the material that sulfonation obtains or the material alkylnaphthalene sulfonation such as dinonyl naphthalene obtained, described alkylbenzene by manufacture lotion raw material alkylbenzene plant-site by-product or polyolefine and benzene alkylation are obtained.
Be not particularly limited as by sulphonating agent during these alkyl aromatic compound sulfonation, usually use oleum, anhydrous slufuric acid.
As basic metal or alkaline-earth metal, such as, sodium, potassium, magnesium, barium, calcium can be listed, preferably magnesium or calcium, particularly preferably calcium.
(B) base number of composition is below 150mgKOH/g, be preferably lower than 50mgKOH/g neutral sulfonate, be more preferably below 40mgKOH/g, more preferably below 30mgKOH/g.When base number is more than 150mgKOH/g, the clean dissemination based on soap base composition can not be obtained fully.
(B) metal of composition is than being preferably more than 1.In addition, be preferably less than 10, be more preferably less than 5, more preferably less than 2.
(B) content of composition is not particularly limited, convert with amount of metal in total composition benchmark, be preferably more than 30 quality ppm, be more preferably more than 50 quality ppm, more preferably more than 100 quality ppm, be particularly preferably more than 150 quality ppm.On the other hand, be preferably below 1000 quality ppm, be more preferably below 800 quality ppm, more preferably below 500 quality ppm.
When content is lower than 30 quality ppm, there is the worry that can not obtain required spatter property and sour neutrality, during more than 1000 quality ppm, viscosity characteristics deterioration, oil consumption are saved property and are worsened.
Lubricating oil composition of the present invention contains zinc dithiophosphate as (C) composition.As zinc dithiophosphate, the compound that following general formula (1) represents can be listed.
[in formula, R
1, R
2, R
3and R
4can be identical or different, represent the alkyl of carbon number more than 1 respectively.]
As by R
1~ R
4the alkyl represented, such as, the arylalkyl of the alkyl of carbon number 1 ~ 24, the cycloalkyl of carbon number 5 ~ 7, the alkyl-cycloalkyl of carbon number 6 ~ 11, the alkenyl of carbon number 2 ~ 24, the aryl of carbon number 6 ~ 18, the alkylaryl of carbon number 7 ~ 24 and carbon number 7 ~ 12 can be listed.
As alkyl, such as, methyl, ethyl, propyl group, sec.-propyl, normal-butyl, isobutyl-, the tertiary butyl, amyl group, isopentyl, hexyl, heptyl, 3-heptyl, octyl group, 2-ethylhexyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, 2-ethyl-butyl, 1-aminomethyl phenyl, 1 can be listed, 3-dimethylbutyl, 1,1,3,3-tetramethyl butyl, 1-methylhexyl, different heptyl, 1-methylheptyl, 1,1,3-trimethyl and 1-methylundecyl etc.
Among them, the alkyl of the alkyl of preferred carbon number 3 ~ 12, more preferably carbon number 4 ~ 8.
As cycloalkyl, such as, cyclopentyl, cyclohexyl, suberyl, ring octyl group or cyclo-dodecyl etc. can be listed.
As cycloalkylalkyl, cyclopentyl-methyl, cyclohexyl methyl etc. can be listed.
As aryl, phenyl, tolyl, xylyl etc. can be listed.
As alkylaryl, ethylphenyl, ethenylphenyl, aminomethyl phenyl, 3,5-dimethylphenyl, trimethylphenyl, ethylphenyl, isopropyl phenyl, tert-butyl-phenyl, two-tert-butyl-phenyl, 2,6-di-t-butyl-4-aminomethyl phenyls etc. can be listed.
As arylalkyl, benzyl, phenylethyl, phenyl propyl, phenyl butyl, phenylpentyl, Phenylhexyl, naphtylethyl group etc. can be listed.
Among them, be preferably alkyl, be particularly preferably the alkyl of 1 grade.The alkyl of 1 grade means R
1~ R
4carbon among be 1 grade of carbon with the carbon of oxygen bonding.Namely as alkyl, preferably by-CH
2the group (alkyl of R ' hydrogen atom or straight-chain or branched) that-R ' represents.
As (C) zinc dithiophosphate, particularly preferably zinc dialkyl dithiophosphate, specifically, diη-propyl zinc dithiophosphate, di-secondary propyl disulfide can be listed for zinc phosphate, di-n-butyl zinc dithiophosphate, di-sec-butyl zinc dithiophosphate, two n-pentyl zinc dithiophosphates, di-sec-amyl zinc dithiophosphate, di-n-hexyl zinc dithiophosphate, two Sec-Hexyl zinc dithiophosphates, di-n-octyl zinc dithiophosphate, two secondary octyl zinc dithiophosphates etc.
(C) content of composition is not particularly limited, and converts with phosphorus amount in total composition benchmark, preferred more than 300 quality ppm, more preferably more than 500 quality ppm, further preferred more than 800 quality ppm.On the other hand, be preferably below 2000 quality ppm, be more preferably below 1500 quality ppm, more preferably below 1200 quality ppm.
When content is lower than 300 quality ppm, there is the worry that can not obtain enough wear resistants, during more than 2000 quality ppm, there is worry catalyst for treating waste gas being produced to bad influence.
The following condition (i) of lubricating oil composition demand fulfillment of the present invention and (ii).
[M]≥1100(i)
[M]+2×[P]≥2600(ii)
[M] in formula represents the amount of metal (quality ppm) being derived from (A) composition and (B) composition in the total composition benchmark of lubricating oil composition.
[P] in formula represents the phosphorus amount (quality ppm) being derived from (C) composition in the total composition benchmark of lubricating oil composition.
[M] is more than 1100, preferably more than 1500, more preferably more than 2000, further preferably more than 3000.By [M] is set to more than 1100, thus the resistance to cokeability for turbo-supercharger can be improved.On the other hand, preferably less than 10000, more preferably less than 5000, further preferably less than 4000.During more than 10000, there is the worry that excessive metal ingredient is piled up, therefore not preferred.
[M]+2 × [P] be more than 2600, preferably more than 3000, further preferably more than 4000.By [M]+2 × [P] is set to more than 2600, thus the resistance to cokeability for turbo-supercharger can be improved.On the other hand, preferably less than 10000, more preferably less than 7000.During more than 10000, there is worry catalyst for treating waste gas being produced to bad influence, therefore not preferred.
Lubricating oil composition of the present invention so can also containing ashless dispersant as (D) composition.
Ashless dispersant is not particularly limited, and can use the material usually used, such as, can exemplify and at least have the alkyl of 1 carbon number 40 ~ 400 or the nitrogenous compound of alkenyl or derivative etc. in the molecule.
They can be used alone a kind of compound, also can use the mixture etc. of two or more compound with any blending ratio.
As alkyl or alkenyl, can be that straight-chain also for branched, as preferred material, can list branched-chain alkyl, the branched alkenyl of the copolymerized oligomer of the oligopolymer of the alkene such as derived from propylene, 1-butylene, iso-butylene, ethene and propylene.
The carbon number of alkyl or alkenyl is generally 40 ~ 400, is preferably 60 ~ 350.Lower than 40 time, there is the worry reduced relative to the solvability of base oil, on the other hand, when carbon number is more than 400, exist lubricating oil composition low-temperature fluidity worsen worry.
As (D) composition, more specifically, the one kind or two or more compound etc. be selected from following substances can be exemplified:
(D1) at least there is in molecule the alkyl of 1 carbon number 40 ~ 400 or the succinimide or derivatives thereof of alkenyl;
(D2) at least there is in molecule 1 and have the alkyl of carbon number 40 ~ 400 or the benzylamine or derivatives thereof of alkenyl;
(D3) at least there is in molecule the alkyl of 1 carbon number 40 ~ 400 or the polyamines or derivatives thereof of alkenyl.
In the present invention, from the viewpoint preferred (D1) of dispersing property.
As (D1) succinimide, more specifically, the compound represented by following general formula (2) or (3) can be listed.
Above-mentioned general formula (2) and (3) middle R
5, R
6and R
7separately represent carbon number 40 ~ 400, preferably 60 ~ 350 alkyl or alkenyl, b represents the number of 1 ~ 5, preferably 2 ~ 4, and c represents the number of 0 ~ 4, preferably 1 ~ 3.
The manufacture method of this succinimide is not by any restriction, such as, after the polyolefine such as can enumerate that propylene oligomer of sening as an envoy to, polybutene, ethylene-propylene overlap altogether and maleic anhydride are obtained by reacting alkenyl succinic anhydrides, the polyamines such as diethylenetriamine, Triethylenetetramine (TETA), tetren, penten are used to carry out imidization and the material etc. that obtains.
It should be noted that in succinimide, to there is the so-called single entry succinimide as general formula (2) being added with succinyl oxide when imidization in one end of polyamines and the two formula succinimide of the what is called as general formula (3) being added with succinyl oxide at the two ends of polyamines.As (D1) composition, can be any of them or the mixture that also can use them, from the view point of high-temperature cleaning, the two formula succinimides preferably represented by formula (3).
As (D2) benzylamine, more specifically, the compound etc. represented by following general formula (4) can be exemplified.
In above-mentioned general formula (4), R
8represent carbon number 40 ~ 400, preferably represent 60 ~ 350 alkyl or alkenyl, d represents the number of 1 ~ 5, preferably 2 ~ 4.
The manufacture method of this benzylamine is not by any restriction, such as, after can reacting and make alkylphenol by the polyolefine such as make propylene oligomer, polybutene, ethylene-propylene overlap altogether and phenol, Mannich reaction is utilized to make this alkylphenol and the polyamines such as formaldehyde and diethylenetriamine, Triethylenetetramine (TETA), tetren, penten react and obtain.
As (D3) polyamines, more specifically, the compound etc. represented by following general formula (5) can be exemplified.
In above-mentioned general formula (5), R
9the alkyl of expression carbon number 40 ~ 400, preferably 60 ~ 350 or alkenyl, e represents the number of 1 ~ 5, preferably 2 ~ 4.
The manufacture method of this polyamines is not by any restriction, such as, can by by after the polyolefine chlorinations such as propylene oligomer, polybutene, ethylene-propylene overlap altogether, react with the polyamines such as ammonia, ethylene diamine, diethylenetriamine, Triethylenetetramine (TETA), tetren, penten and obtain.
In addition, as (D) composition, the derivative of these nitrogenous compounds is also preferably used.As the derivative of (D) composition, specifically, such as, can exemplify, the poly carboxylic acid of the carbon numbers 2 ~ 30 such as the monocarboxylic acid of carbon number 2 ~ 30 (lipid acid etc.), oxalic acid, phthalic acid, trimellitic acid, pyromellitic acid is made to act on these nitrogenous compounds, the what is called acid modified compound part or all neutralization of remaining amino and/or imino-or amidation obtained; Boric acid is made to act on these nitrogenous compounds, the so-called boron modification compound part or all neutralization of remaining amino and/or imino-obtained; Sulphur compound is made to act on these nitrogenous compounds and the so-called sulphur modified compound obtained; And combination is selected from the modified compound etc. of modification of more than two kinds of sour modification, boron modification, sulphur modification in these nitrogenous compounds.
Ashless dispersant also can not contain, and containing sometimes, its content is generally 0.1 ~ 5 quality %, preferably 0.5 ~ 4.5 quality %, further preferred 1 ~ 4 quality % in total composition benchmark.When this content is lower than 0.1 quality %, there is the worry of turbine coking penalty, in addition, during more than 5 quality %, there is the worry that can not obtain the effect matched with content, there is the tendency that spatter property worsens.
In lubricating oil composition of the present invention, normally used arbitrary additive can also be added in lubricating oil except them.As such additive, such as, extreme pressure agent, antioxidant, friction regulator, viscosity index improving agent, anticorrosive agent, rust-preventive agent, non-emulsifying agent, metal passivator, defoamer or tinting material can be listed.
As extreme pressure agent, such as, phosphorous acid esters, thiophosphite class, dithio phosphorous acid esters, trithiophosphite class, phosphoric acid ester, group thiophosphate, dithio acid esters (removing (C) composition), phosphorotrithioate class, their amine salt, their metal-salt, their derivative, dithiocarbamate, disulfides, multiple sulfides, olefine sulfide class, vulcanized oil lipid can be listed.
The content of extreme pressure agent is generally 0.01 ~ 5 quality % in total composition benchmark.
As antioxidant, ashless antioxidant or the metal system antioxidant such as phenol system, amine system can be listed.From the situation of anti-cokeability excellence among them, preferred phenol system antioxidant, preferred bis-phenol system or there is the phenol system antioxidant of ester bond.Specifically, particularly preferably octyl group-3-(3,5-di-tert-butyl-hydroxy phenyl) 3, the 5-dialkyl group-4-hydroxy phenyl substituted fatty acid ester classes such as propionic ester, octyl group-3-(3-methyl-5-tert-butyl-hydroxy phenyl) propionic ester (1 in alkyl is the tertiary butyl, all the other are methyl or the tertiary butyl).
The content of antioxidant is generally 0.1 ~ 5 quality % in total composition benchmark, is preferably 0.5 ~ 2 quality %.
As friction regulator, such as, organic molybdenum, fatty acid ester, fatty amine, fatty acid amide etc. can be listed.
The content of friction regulator is generally 0.01 ~ 5 quality % in total composition benchmark.
As viscosity index improving agent, such as, polymethacrylate system viscosity index improving agent, olefin-copolymerization system viscosity index improving agent, styrenic-diene copolymerization system viscosity index improving agent, phenylethylene-maleic anhydride ester copolymer system's viscosity index improving agent or alkyl styrenes system viscosity index improving agent can be listed.Among them, from the situation that anti-cokeability is more excellent, preferred alkenes copolymerization system viscosity index improving agent or styrenic-diene copolymerization system viscosity index improving agent, wherein, particularly preferably ethene-alpha-olefin copolymer system viscosity index improving agent.The weight-average molecular weight of these viscosity index improving agents is generally 800 ~ 1000000, is preferably 100000 ~ 900000.
The content of viscosity index improving agent is generally 0.1 ~ 20 quality % in total composition benchmark.
As anticorrosive agent, such as, benzotriazole system, methyl benzotriazazole system, thiadiazoles system or imidazole compound can be listed.
As rust-preventive agent, such as, petroleum sulfonate, benzene sulfonamide acid esters, dinonylnaphthalene sulfonic acid ester, alkenyl succinate acid esters or polyol ester can be listed.
As non-emulsifying agent, such as, nonionic system of the polyalkylene glycol system tensio-active agents such as polyoxyethylene ether, polyoxyethylene phenyl ether or polyoxyethylene naphthyl ether can be listed.
The content of anticorrosive agent, rust-preventive agent, non-emulsifying agent is generally 0.005 ~ 5 quality % in total composition benchmark.
As metal passivator, such as, tetrahydroglyoxaline, pyrimidine derivatives, alkyl thiadiazoles, mercaptobenzothiazole, benzotriazole or derivatives thereof, 1 can be listed, 3,4-thiadiazoles polysulfide, 1,3,4-thiadiazolyl group-2,5-two dialkyl dithio amino formate, 2-(alkyl dithio) benzoglyoxaline or β-(adjacent carboxybenzyl sulfenyl) propionitrile.
It is 0.005 ~ 1 quality % that the content of metal passivator is generally in total composition benchmark.
As defoamer, such as, ester, cresotinic acid acid esters, adjacent hydroxy-benzyl alcohol, aluminum stearate, potassium oleate, N-dialkyl group-allyl group amido nitra-amine base alkanol, the aromatic series amine salt of isopentyl octyl phosphate, alkyl alkylene bisphosphate, the metal derivative of thioether, the metal derivative of disulphide, the fluorine cpd of aliphatic hydrocarbon, triethyl silicane, dichlorosilane, alkyl phenyl polyoxyethylene glycol ether thioether, the fluoro-alkyl ether of silicone oil, alkenyl succinic derivative, poly-hydroxyl group aliphatic alcohol and longer chain fatty acid can be listed.
The content of defoamer is generally 0.0005 ~ 1 quality % in total composition benchmark.
Kinematic viscosity at 100 DEG C of lubricating oil composition of the present invention is generally 5.5 ~ 21.9mm
2/ s, preferably 9.3 ~ 16.3mm
2/ s.
Lubricating oil composition of the present invention plays high oil consumption saving property and anti-cokeability.Therefore, especially aptly as the lubricating oil composition of oil engine purposes possessing the turbo-supercharger being in most cases exposed to high temperature, in oil engine, effectively coking can be suppressed.
Embodiment
Below list embodiment, specifically describe the present invention, but the present invention is not limited to these embodiments.
(embodiment 1 ~ 8, comparative example 1 ~ 6)
The lubricating oil composition of the composition represented in preparation table 1.Based on the ratio (capacity %) of base oil, the addition (quality %) of oily total amount benchmark, each additive is total composition benchmark.The anti-cokeability of each lubricating oil composition is evaluated by following panel coking test.
(panel coking test)
In the test chamber possessing splasher (splasher), drop into 300mL lubricating oil composition, aluminum panel is installed.Sample oil is heated to oil temperature 100 DEG C, panel temperature 320 DEG C with panel.When reaching Conditions Temperature, with 1000rpm, splasher being rotated and oil is splashed on panel.Carry out to sputter the circulation then stopping for 45 seconds 15 seconds.Be determined at the weight (mg) of the carbon that aluminum deck adheres to etc. after 3 hours.
Table 1
Claims (8)
1. a lubricating oil composition, it is characterized in that, containing the high alkalinity phenates system sanitising agent of (A) more than base number 100mgKOH/g, sulfonate system's sanitising agent of (B) below base number 150mgKOH/g and (C) zinc dithiophosphate in base oil, meet following condition (i) and (ii)
[M]≥1100(i)
[M]+2×[P]≥2600(ii)
In formula, [M] represent in lubricating oil composition from (A) composition and (B) composition in the amount of metal of quality ppm, [P] represent in lubricating oil composition from (C) composition in the phosphorus amount of quality ppm.
2. lubricating oil composition according to claim 1, is characterized in that, the sulfonate system sanitising agent of (B) composition is the neutral sulfonate system sanitising agent of base number lower than 50mgKOH/g.
3. lubricating oil composition according to claim 1 and 2, is characterized in that, phenates system sanitising agent is phenol calcium, sulfonate system sanitising agent is calcium sulphonate.
4. the lubricating oil composition according to any one of claims 1 to 3, is characterized in that, the kinematic viscosity at 100 DEG C of base oil is 5.0mm
2/ more than s.
5. the lubricating oil composition according to any one of Claims 1 to 4, is characterized in that, also containing (D) ashless dispersant.
6. lubricating oil composition according to claim 5, is characterized in that, the content of (D) ashless dispersant counts more than 0.1 quality % and below 5 quality % with total composition benchmark.
7. the lubricating oil composition according to any one of claim 1 ~ 6, is characterized in that, uses in oil engine.
8. the lubricating oil composition according to any one of claim 1 ~ 7, is characterized in that, uses in the oil engine being provided with turbo-supercharger.
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| CN201410116638.1A CN104946353A (en) | 2014-03-26 | 2014-03-26 | Lubricating oil composition |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869179A (en) * | 2005-05-27 | 2006-11-29 | 英菲诺姆国际有限公司 | A method of lubricating a crosshead engine |
| CN102666819A (en) * | 2009-12-24 | 2012-09-12 | 吉坤日矿日石能源株式会社 | Cylinder lubricant oil composition for crosshead-type diesel engine |
| CN102686712A (en) * | 2009-12-24 | 2012-09-19 | 吉坤日矿日石能源株式会社 | System lubricant oil composition for crosshead-type diesel engine |
-
2014
- 2014-03-26 CN CN201410116638.1A patent/CN104946353A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1869179A (en) * | 2005-05-27 | 2006-11-29 | 英菲诺姆国际有限公司 | A method of lubricating a crosshead engine |
| CN102666819A (en) * | 2009-12-24 | 2012-09-12 | 吉坤日矿日石能源株式会社 | Cylinder lubricant oil composition for crosshead-type diesel engine |
| CN102686712A (en) * | 2009-12-24 | 2012-09-19 | 吉坤日矿日石能源株式会社 | System lubricant oil composition for crosshead-type diesel engine |
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