CN102690708B - Lubricant composition for ethanol engine - Google Patents
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Abstract
The invention discloses a lubricant composition for an ethanol engine. The lubricant composition comprises A) a composite antioxidant comprising at least components of 1, an alkylated diphenylamine antioxidant, 2, a thiophenolic ester antioxidant and 3, an unessential phenolic thioether antioxidant, B) polyisobutylene succinimide, C) a mixture of calcium sulfonate and sodium sulfonate, D) at least one zinc dialkyl dithiophosphate, E) one or more dialkyl dithiocarbamates, F) one or more metal deactivators, and G) a main amount of lubricating base oil. The lubricant composition has a synergistic effect of the additives, can satisfy high-temperature antioxidation requirements of lubricating oil for an ethanol engine, and has excellent piston cleanliness, high/low-temperature wear resistance and a good viscosity increasing control capacity.
Description
Technical field
The present invention relates to lubricating oil composition, relate in particular to a kind of lubricating oil composition for ethanol engine.
Background technology
In today of international energy anxiety, ethanol petrol fuel as an alternative receives global concern, and China various places are widely used.Because ethanol petrol has environmental protection, energy-conservation superperformance, be conducive to alleviate the petroleum resources shortage, improve atmospheric environment, therefore, promote the use of vehicle-use alcohol gasoline and be a strategic act of country, significant to the Sustainable development of national economy.For long-term the maintenance used the good running status of alcohol fuel motor car engine, research and develop new special most important for the engine oil of alcohol fuel characteristic.
Vehicle-use alcohol gasoline is a kind of new automobile fuel that denatured fuel ethanol and gasoline are mixed by a certain percentage and form.Ethanol petrol fuel more easily causes corrosion to engine, the acidic substance such as its combustion products acetic acid, sulfide are scurried in lubricating oil with fuel, can cause that oil oxidation is rotten, the rapid reduction of base number, greasy filth increases the weight of, and also can cause the wearing and tearing of engine piston ring and cylinder wall simultaneously.Therefore must suppress the rotten of oil product with efficient oxidation inhibitor for the engine oil with alcohol fuel.With the engine that only uses gasoline, compare, use the engine containing alcohol fuel (10%-100% ethanol) partly to produce significant wearing and tearing at cylinder sleeve of engine, piston ring and air inlet and exhaust valve, therefore anti-oxidant, antirust, the abrasion resistance of ethanol petrol engine oil are had relatively high expectations.Seek more efficiently antioxidant additive and research and development application in the high performance engine oil of ethanol fuel engine, be the target that those skilled in the art make great efforts always.
CN100460490C has introduced a kind of by alkylated diphenylamine and the composite antioxidant component of phenolic ester, the resistance of oxidation of the raising oil product that it can be by a relatively large margin.
US20090111722A has introduced a kind of lubricating oil composition, the abrasion protection of engine when said composition is used for using alcohol fuel.What said composition comprised spends base number calcium salt purification agent, the engine scuffing caused in the time of can reducing the use alcohol fuel, the drain period of prolongation lubricating oil.
Summary of the invention
The invention provides a kind of ethanol engine lubricating oil composition, said composition has excellent antioxidant property, provides that good high temperature is peace and quiet, wear resistance simultaneously.
Ethanol engine lubricating oil composition provided by the invention comprises following component:
A>composite antioxidant at least comprises following component: alkylated diphenylamine oxidation inhibitor, sulfophenates type oxidation inhibitor, non-essential thioether phenol type antioxidant;
B>polyisobutene succinimide ashless dispersant;
The mixture of C>calcium sulphonate and sodium sulfonate;
D>at least one zinc dialkyl dithiophosphate;
E>one or more dialkyl dithio amino formates;
F>one or more metal passivators;
The lubricant base of G>main amount;
Can also there is other additive in lubricating oil composition of the present invention, as rust-preventive agent, pour point depressant, viscosity index improver (VM), kilfoam etc.
Specifically, ethanol engine lubricating oil composition of the present invention comprises following component:
A>composite antioxidant at least comprises following component: (1) alkylated diphenylamine oxidation inhibitor; (2) sulfophenates type oxidation inhibitor; (3) non-essential thioether phenol type antioxidant.
(1) the alkylated diphenylamine structural formula is:
R wherein
1, R
2h or C respectively do for oneself
1-C
12alkyl, preferably C
4-C
9alkyl, the position at place is in amino contraposition or ortho position, preferably the tertiary butyl and/or iso-octyl.
Alkylated diphenylamine accounts for the 50%-95% of total mass in composite antioxidant, is preferably 60%-90%.IRGANOX L-01, IRGANOX L-57 that alkylated diphenylamine can select BASF Aktiengesellschaft to produce, the T534 that Beijing Xing Pu company produces, the LZ5150A that the blue refining of Lu Borun additive company limited produces, VANLUBE NA, VANLUBE 961, dioctyl diphenylamine VANLUBE 81 that U.S. Vanderbilt company produces, it is right that TUV chemical company produces, to ' di-iso-octyldiphenylamine RC7001.
Preferred alkylated diphenylamine oxidation inhibitor is the tertiary butyl/di-iso-octyldiphenylamine (T534 that for example Xing Pu company in Beijing produces).
(2) structural formula of sulfophenates type oxidation inhibitor is:
R wherein
3, R
4h or C respectively do for oneself
1-C
12alkyl, preferably C
1-C
9alkyl, be preferably methyl and/or the tertiary butyl.Wherein m, n are the integer between 0-10, are preferably 0,1 or 2.
Sulfophenates type oxidation inhibitor accounts for the 5%-50% of total mass in composite antioxidant, is preferably 8%-30%.Preferred sulfophenates type oxidation inhibitor is 2,2 '-[3-(3 for thiobis, the 5-di-tert-butyl-hydroxy phenyl) ethyl propionate] (for example the Sichuan oxidation inhibitor 1035 that industry chemical industry company limited produces forever, the IRGANOX L115 that BASF Aktiengesellschaft produces).
(3) structural formula of thioether phenol type antioxidant is:
R wherein
5, R
6h or C respectively do for oneself
1-C
12alkyl, preferably C
1-C
9alkyl, be preferably methyl and/or the tertiary butyl.Wherein q is the integer between 0-10, preferably 0,1 or 2.
The thioether phenol type antioxidant accounts for the 0-20% of total mass in composite antioxidant, is preferably 1%-15%.Preferred thioether phenol type antioxidant is thiobis-(3,5-di-t-butyl-4-hydroxyl benzyl) (the methene 4426-S that for example Ling Chi chemical company in Changzhou produces, the Lowinox TBP-6 that U.S. big lake company produces, the Irganox 1081 that BASF Aktiengesellschaft produces).
In a preferred embodiment, composite antioxidant of the present invention is composed of the following components: (1) tertiary butyl/di-iso-octyldiphenylamine; (2) 2,2 '-thiobis [3-(3,5-di-tert-butyl-hydroxy phenyl) ethyl propionate]; (3) thiobis-(3,5-di-t-butyl-4-hydroxyl benzyl).
Component A composite antioxidant accounts for the 0.1%-10% of lubricating oil composition total mass of the present invention, preferably 0.2%-6%, preferably 0.3%-5%.
B>be selected from polyisobutene succinimide ashless dispersant.
The number-average molecular weight of polyisobutene in polyisobutene succinimide ashless dispersant (PIB) part is 800-4000, preferably 900-3000, preferably 1000-2400.The T161 that this component can select Suzhou specialty oil products factory to produce, T161A, T161B that Jinzhou Petrochemical Company additive factory produces, the LZL157 that the blue refining of Lu Borun additive company limited produces, LZ6418, LZ6420 that Lubrizol Corporation produces, the Hitec646 that Afton Corporation produces etc.
B component accounts for the 0.5%-10% of lubricating oil composition total mass of the present invention, preferably 1.5%-8%, preferably 3%-6%.
C>the be selected from mixture of calcium sulphonate and sodium sulfonate, the mixture of the sulfonate with high base number sodium that the calcium sulfonate with high base number that preferably base number is (200-450) mgKOH/g and base number are (200-450) mgKOH/g, the mass ratio between the two is between 1: 1 to 4: 1.Component C can select marine T101, T102, the T103 that additive factory produces that refine, the T106 that Jinzhou Petrochemical Company additive factory produces, LZ6478, LZ6446, LZ75, LZ78 that Lubrizol Corporation produces, Hitec611, Hitec614 that Afton Corporation produces, the KT5448 that Jinzhou Kangtai Lube Additive Co., Ltd. produces, OLOA246S, OLOA249S etc. that Chevron Oronite Company produces.
Component C accounts for 0.2%-10%, preferred 0.8%-8%, the preferably 1.2%-6% of lubricating oil composition total mass.
One or more of D>be selected from zinc dialkyl dithiophosphate, alkyl in described zinc dialkyl dithiophosphate is the alkyl that contains 2 to 12 carbon atoms, the alkyl that preferably contains 2 to 8 carbon atoms can be ethyl, n-propyl, sec.-propyl, normal-butyl, isobutyl-, sec-butyl, n-pentyl, isopentyl, n-hexyl, isohexyl, n-octyl, 2-ethylhexyl, cyclohexyl, methylcyclopentyl.T202, T203 that zinc dialkyl dithiophosphate can select WUXI SOUTH PETROLEUM ADDITIVE Co., LTD. to produce, primary alkyl T202, primary alkyl T203, brothers alkyl T204, secondary alkyl T205 that Jinzhou Petrochemical Company additive factory produces, LZ1371, LZ1375 that Lubrizol company produces, C9417, C9425, C9426 that Infineum company produces, Hitec7169, Hitec1656 etc. that Afton company produces.
Component D accounts for 0.1%-5%, preferred 0.3%-3%, the preferably 0.5%-2% of lubricating oil composition total mass.
One or more of E>be selected from dialkyl dithio amino formate, alkyl in described dialkyl dithio amino formate is the alkyl that contains 2 to 12 carbon atoms, the alkyl that preferably contains 2 to 8 carbon atoms can be ethyl, n-propyl, sec.-propyl, normal-butyl, isobutyl-, sec-butyl, n-pentyl, isopentyl, n-hexyl, isohexyl, n-octyl, 2-ethylhexyl.The T323 that dialkyl dithio amino formate can select Jinzhou emerging petroleum additive limited liability company to produce, 7723 etc. of Vanderbilt company.
Component E accounts for the 0.02%-5% of lubricating oil composition total mass, and preferred amounts is 0.05%-2%, is preferably 0.1%-0.5%.
F>be selected from triazole derivative, one or more of the metal passivator such as thiazole derivative and thiadiazoles derivative, metal passivator commonly used comprises benzothiazole, tolyl-triazole, the octyl group triazole, 2-mercaptobenzothiazole, 2, 5-dimercapto-1, 3, the 4-thiadiazoles, 2-sulfydryl-5-hydrocarbon replaces-1, 3, the 4-thiadiazoles, 2-dimercapto-5-dithio-1, 3, the 4-thiadiazoles, N, N-dihexyl aminomethylene 124 Triazole, 2-sulfydryl diazosulfide etc., trade names have T551, T561, T706 etc., the T551 that can select Jinzhou Kangtai Lube Additive Co., Ltd. to produce, T561, T706 etc.
Component F accounts for the 0.01%-0.5% of lubricating oil composition total mass, and preferred amounts is 0.03%-0.25%, is preferably 0.05%-0.15%.
The lubricant base of G>main amount, can be selected from mineral oil and ucon oil or their mixture.
Described mineral oil can be from lighting end mineral oil to last running mineral oil on viscosity, comprise Witco 70 and hydrorefined, that solvent treatment is crossed alkane, cycloalkanes and mixing alkane-cycloalkanes type mineral lubricating oils, usually be divided into I, II, III class base oil, common trade names comprise I class 150SN, 600SN, HVI 500, HVI 750, II class 100N, 150N, III class base oil S-8 etc.
Ucon oil comprises the polymerization hydrocarbon ils, the alkyl benzene and its derivative, the concrete example of polymerization hydrocarbon ils includes but not limited to polybutene, polypropylene, propylene-isobutylene copolymers, the polybutene of chlorination, poly-(1-hexene), poly-(1-octene), poly-(1-decene), common trade names comprise PAO4, PAO6, PAO8, PAO10 etc., the concrete example of alkyl benzene and its derivative includes but not limited to as dodecylbenzene, Tetradecylbenzene, dinonyl benzene, two (2-ethylhexyl) benzene, the derivative of alkylbenzene comprises alkylating phenyl ether and alkylating diphenyl sulfide and derivative thereof, analogue and homologue.The applicable type of another of ucon oil is ester class oil, comprise that ester or the complex ester that condensation reaction generates occurs for dicarboxylic acid (as phthalic acid, succsinic acid, alkyl succinic acid and alkenyl succinic acid, toxilic acid, nonane diacid, suberic acid, sebacic acid, FUMARIC ACID TECH GRADE, hexanodioic acid, linoleic acid dimer, propanedioic acid, alkyl propanedioic acid, thiazolinyl propanedioic acid) and various alcohol (as butanols, hexanol, dodecyl alcohol, 2-ethylhexyl alcohol, ethylene glycol, propylene glycol).The object lesson of these esters includes but not limited to the 2-ethylhexyl diester of Polycizer W 260, sebacic acid two (2-ethylhexyl) ester, the just own ester of FUMARIC ACID TECH GRADE acid two, dioctyl sebacate, diisooctyl azelate, two different decayl esters of azelaic acid, dioctyl phthalate (DOP), didecyl phthalate, sebacic acid two (larane base) ester, linoleic acid dimer.
The applicable type of another of ucon oil is Fischer-Tropsch method synthetic hydrocarbon oil and lubricant base that this synthetic hydrocarbon oil is obtained by art breading such as hydroisomerizing, hydrocracking, dewaxings.
Can also there is other following additive in lubricating oil composition of the present invention:
Rust-preventive agent can be used and be selected from nonionic polyoxyalkylene polyol and ester, polyoxyalkylene phenol negatively charged ion alkylsulphonic acid, Aliphatic monoacid or polyprotonic acid etc., and common example comprises dodecenylsuccinic acid, sorbitan list olein, sorbitan trioleate etc.
Pour point depressant or be called the lubricating oil flow improving agent, can reduce the minimum temperature that fluid flows and maybe can topple over.Typical additive is the alkyl dialkyl group fumarate/vinyl acetate copolymer that is C8 to C18, poly-alkylmethacrylate etc., and common trade names have T803, VX385, T148 etc.
Applicable viscosity index improver is polyisobutene, the multipolymer of ethene and propylene and senior Q-alkene, polymethacrylate/salt, poly-alkylmethacrylate, methacrylic ester/salt copolymer, the multipolymer of unsaturated dicarboxylic acid and vinyl compound, the multipolymer of vinylbenzene and acrylate, styrene/isoprene, phenylethylene/butadiene, partially hydrogenated multipolymer with isoprene/butadiene, and the partially hydrogenated homopolymer of divinyl and isoprene and isoprene/Vinylstyrene, common trade names have the LZ7070 of Lubrizol company, LZ7065, LZ7067, LZ7077, the SV260 of Infineum company, SV261, T614 etc.They can form the 0.01%-20% of lubricating oil composition total mass.
Kilfoam can be selected polysiloxane type, as silicone oil or polydimethylsiloxane.
Lubricating oil composition of the present invention can adopt following methods preparation: each additive (comprise in composite antioxidant one or more) is joined respectively in base oil or additive is mixed and made into to enriched material and join heating in base oil again and mix, mixing temperature is between 40 ℃-90 ℃, and mixing time is between 1 hour-6 hours.
The present invention selects the multiple synergistic ashless oxidation inhibitor optimum combination that has, and composite suitable purification agent, dispersion agent and other functional additive, produced significant antioxidant effect, significantly strengthen high temperature wear resistance and piston cleansing performance, can meet the lubricating requirement of ethanol fuel engine.
Embodiment
Below with example, further describe characteristics of the present invention.
Composite antioxidant preparation example 1-5
Oxidation inhibitor T534,1035, methene 4426-S are joined in the mediation container in proportion, and under normal pressure, heating is 60 ℃-90 ℃, stirs 1 hour-2 hours, obtains the lurid thick liquid of homogeneous transparent and is component A composite antioxidant of the present invention.The proportion of composing (massfraction) of composite antioxidant preparation example 1-5 is in Table 1.
Table 1
| Sequence number | Oxidation inhibitor T534 | Oxidation inhibitor 1035 | Oxidation inhibitor methene 4426-S |
| Composite antioxidant preparation example 1 | 90％ | 10％ | |
| Composite antioxidant preparation example 2 | 80％ | 20％ | |
| Composite antioxidant preparation example 3 | 70％ | 30％ | |
| Composite antioxidant preparation example 4 | 70％ | 25％ | 5％ |
| Composite antioxidant preparation example 5 | 70％ | 20％ | 10％ |
Embodiment 1-5 and Comparative Examples 1,2,3-1,3-2,4
The composition that embodiment 1-5 is lubricating oil composition of the present invention and main character.Each component is joined in the mediation container in proportion, and under normal pressure, heating is 45 ℃-80 ℃, stirs 1 hour-2 hours, prepares the lubricating oil composition that viscosity grade is 10W-40.In Comparative Examples 1, 2, added single component oxidation inhibitor in 3-1, be respectively T534, 1035, methene 4426-S, added the two-pack composite antioxidant prepared by patent CN100460490C method in Comparative Examples 3-2, wherein embodiment 1 and Comparative Examples 1, embodiment 2 has respectively whole identical formulas except oxidation inhibitor with Comparative Examples 2 and forms, embodiment 3 and Comparative Examples 3-1, 3-2 also has whole identical formulas except oxidation inhibitor and forms, embodiment 4 is in embodiment 4 to have added the second, n-butyl dithiocarbamate ester with the difference of Comparative Examples 4, do not add the second, n-butyl dithiocarbamate ester in Comparative Examples 4.Embodiment 1-5 and Comparative Examples 1,2,3-1,3-2,4 proportion of composing separately are in Table 2.
Embodiment 1-5 and Comparative Examples 1,2,3-1,3-2 and commercially available ethanol engine lubricating oil have been carried out to ASTMD4742 oxide thin layer test (TFOUT) and pressurization differential scanning calorimetry (PDSC).The PDSC design temperature is 220 ℃, and concrete outcome is in Table 3.
Table 3
| Oil sample | TFOUT/min | PDSC/min |
| Embodiment 1 | 158 | 36.4 |
| Embodiment 2 | 153 | 39.1 |
| Embodiment 3 | 150 | 37.7 |
| Embodiment 4 | 163 | 37.2 |
| Embodiment 5 | 167 | 38.4 |
| Comparative Examples 1 | 148 | 31.8 |
| Comparative Examples 2 | 143 | 25.3 |
| Comparative Examples 3-1 | 139 | 27.9 |
| Comparative Examples 3-2 | 145 | 33.2 |
| Commercially available oily * | 131 | 18.3 |
* commercially available oil is Great Wall alcohol star ethanol petrol engine special oil SJ 10W-40.
As can be seen from Table 3, lubricating oil composition has effectively improved the oxidation induction period of oil product.The TFOUT test shows that the oxidation induction period of embodiment has improved 15%～25%, PDSC test than corresponding Comparative Examples and shown that the oxidation induction period of embodiment all is better than Comparative Examples.
The high temperature wear resistance result is as shown in table 4, the high temperature that adopts the SRV frictional testing machines the to carry out oil product test of resistance to wearing, and test conditions is 120 ℃ of load 300N, frequency 50Hz, stroke 1mm, temperature.As can be seen from Table 4, the wear scar diameter of the embodiment of the present invention is less than Comparative Examples, shows fastness to wear preferably.
Table 4
| Oil sample | The SRV mill diameter/mm of class |
| Embodiment 1 | 0.66 |
| Embodiment 4 | 0.64 |
| Comparative Examples 1 | 0.69 |
| Comparative Examples 2 | 0.71 |
| Comparative Examples 3-1 | 0.69 |
| Comparative Examples 4 | 0.76 |
| Commercially available oily * | 0.70 |
* commercially available oil is Great Wall alcohol star ethanol petrol engine special oil SJ 10W-40
Embodiment 4 shows to use Keywords dibutyl dithiocarbamate to significantly improve the wear-resistant effect of high temperature of oil product in lubricating oil composition with the result of Comparative Examples 4.
Embodiment 6-9 and Comparative Examples 5-7
Embodiment 6-9 and each 50g of Comparative Examples 5-7 oil product are added respectively to 0.5ml hydrochloric acid, adopt rotating bomb oxidation test to carry out oil product aging.Test apparatus is comprised of Pressure vessel and oil bath, and Pressure vessel becomes 30 ° of rotations with horizontal plane, 150 ℃ of oil bath constant temperature, oxygenation 620kPa (90psi) at room temperature, aging 2h.Weathering test repeats 6 times, obtains each 300ml of oil product and carries out the test of coking plate, and the formula composition of embodiment and Comparative Examples and coking plate test-results are in Table 5.What wherein in embodiment 6,7,8,9, add is the mixture of calcium sulfonate with high base number and sulfonate with high base number sodium, what in Comparative Examples 5,6, add respectively is calcium sulfonate with high base number, the sulfonate with high base number sodium of single component, and Comparative Examples 7 is in Comparative Examples 7 not add metal passivator 2-sulfydryl diazosulfide with the difference of embodiment 6.
Table 5
The equipment that coking plate test adopts is the 25B-19 type coking plate instrument that Japanese Meitech company produces, and the working conditions of this test simulation base chamber and cylinder liner piston ring lubrication oil circulation makes to test constantly the be heated process of oxidation coking of oil product.Test period is 5h, and oil temperature is 150 ℃, and the plate temperature is 310 ℃.
As seen from the results in Table 5, the mixture of calcium sulfonate with high base number and sulfonate with high base number sodium is compared and is had better cleansing performance and acid neutralization capacity with independent calcium sulfonate with high base number or sulfonate with high base number sodium.Add after 2-sulfydryl diazosulfide the also beat all acid neutralization capacity that has obtained better detergency hold facility and Geng Gao.
Embodiment 10
The BRT ball rust test is replacement program II D engine rig test, is mainly used to the anticorrosive of engine evaluated oil and corrosion ability.In the bench testing process of whole 18 hours, Metal Ball continuous contact acidic liquid and the air of test oil guard.Carry out the gray scale test by Metal Ball plane of reflection intensity after off-test, be used for determining corroded area, thus the resistant to tarnishing ability of qualification test oil.Acetic acid/Hydrogen bromide/hydrochloric acid/deionized water injection speed is 0.19 ml/hour, and air draught is 40 ml/min, and oil temperature is 48 ℃.
The embodiment of the present invention 7 has been carried out to above-mentioned ball rust test, and testing oily total basicnumber TBN is 8.7, and the ball rust test result is 126, shows that the present composition has excellent base number hold facility and rust protection ability.
Claims (6)
1. an ethanol engine lubricating oil composition comprises following component:
A > composite antioxidant, account for the 0.2%-6% of lubricating oil composition total mass, at least comprise following component: (1) alkylated diphenylamine oxidation inhibitor; (2) sulfophenates type oxidation inhibitor; (3) thioether phenol type antioxidant;
Said alkylated diphenylamine is the tertiary butyl/di-iso-octyldiphenylamine, accounts for the 60-90% of composite antioxidant total mass;
Said sulfophenates type oxidation inhibitor is 2,2 '-thiobis [3-(3,5-di-tert-butyl-hydroxy phenyl) ethyl propionate], account for the 8-30% of composite antioxidant total mass;
Said thioether phenol type antioxidant is thiobis-(3,5-di-t-butyl-4-hydroxyl benzyl), accounts for the 1-15% of composite antioxidant total mass;
B > polyisobutene succinimide ashless dispersant, in polyisobutene succinimide, the number-average molecular weight of polyisobutene part is 800-4000, accounts for the 1.5%-8% of lubricating oil composition total mass;
C > mixture of calcium sulfonate with high base number and sulfonate with high base number sodium, mass ratio between calcium sulfonate with high base number and sulfonate with high base number sodium is between 1:1 to 4:1, account for the 0.8%-8% of lubricating oil composition total mass, the base number of described calcium sulfonate with high base number is 200-450mgKOH/g, and the base number of sulfonate with high base number sodium is 200-450mgKOH/g;
D > at least one zinc dialkyl dithiophosphate, account for the 0.1%-5% of lubricating oil composition total mass;
E > one or more dialkyl dithio amino formates, account for the 0.02%-5% of lubricating oil composition total mass;
F > one or more metal passivators, comprise 2-sulfydryl diazosulfide, account for the 0.01%-0.5% of lubricating oil composition total mass;
G > the main lubricant base of measuring.
2. according to lubricating oil composition claimed in claim 1, it is characterized in that, the alkyl of described zinc dialkyl dithiophosphate is the alkyl that contains 2 to 12 carbon atoms.
3. according to lubricating oil composition claimed in claim 1, it is characterized in that, described zinc dialkyl dithiophosphate accounts for the 0.3%-3% of lubricating oil composition total mass.
4. according to lubricating oil composition claimed in claim 1, it is characterized in that, the alkyl of described dialkyl dithio amino formate is the alkyl that contains 2 to 12 carbon atoms.
5. according to lubricating oil composition claimed in claim 1, it is characterized in that, described dialkyl dithio amino formate accounts for the 0.05%-2% of lubricating oil composition total mass.
6. according to lubricating oil composition claimed in claim 1, it is characterized in that, described metal passivator accounts for the 0.03%-0.25% of lubricating oil composition total mass.
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| CN104031720A (en) * | 2013-03-06 | 2014-09-10 | 中国石油天然气股份有限公司 | Engine oil additive composition using ethanol or ethanol gasoline as fuel |
| CN109679708B (en) * | 2017-10-18 | 2022-07-15 | 中国石油化工股份有限公司 | Ethanol engine lubricating oil composition and preparation method thereof |
| CN109652186A (en) * | 2019-02-21 | 2019-04-19 | 天津箭牌石油化工有限公司 | A kind of ethanol petrol engine special oil and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822839A (en) * | 1987-11-25 | 1989-04-18 | Hercules Incorporated | Polyunsaturated hydrocarbon polymer-compatible antioxidant compositions |
| CN101851549A (en) * | 2010-07-05 | 2010-10-06 | 中国人民解放军后勤工程学院 | Engine oil of long-service life gasoline engine |
| CN101851548A (en) * | 2010-07-05 | 2010-10-06 | 中国人民解放军后勤工程学院 | Engine oil of long-service life diesel engine |
-
2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822839A (en) * | 1987-11-25 | 1989-04-18 | Hercules Incorporated | Polyunsaturated hydrocarbon polymer-compatible antioxidant compositions |
| CN101851549A (en) * | 2010-07-05 | 2010-10-06 | 中国人民解放军后勤工程学院 | Engine oil of long-service life gasoline engine |
| CN101851548A (en) * | 2010-07-05 | 2010-10-06 | 中国人民解放军后勤工程学院 | Engine oil of long-service life diesel engine |
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