EP1757673B1 - Schmiermittelzusammensetzung für verbrennungsmotoren - Google Patents
Schmiermittelzusammensetzung für verbrennungsmotoren Download PDFInfo
- Publication number
- EP1757673B1 EP1757673B1 EP05255181.9A EP05255181A EP1757673B1 EP 1757673 B1 EP1757673 B1 EP 1757673B1 EP 05255181 A EP05255181 A EP 05255181A EP 1757673 B1 EP1757673 B1 EP 1757673B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricating oil
- oil composition
- composition according
- sulfur
- phosphorus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000203 mixture Substances 0.000 title claims description 203
- 239000010687 lubricating oil Substances 0.000 title claims description 124
- 238000002485 combustion reaction Methods 0.000 title claims description 13
- -1 alkaline earth metal alkyl aryl sulfonate Chemical class 0.000 claims description 145
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 54
- 229910052717 sulfur Inorganic materials 0.000 claims description 54
- 239000011593 sulfur Substances 0.000 claims description 54
- 229910052698 phosphorus Inorganic materials 0.000 claims description 53
- 239000011574 phosphorus Substances 0.000 claims description 53
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 52
- 239000003963 antioxidant agent Substances 0.000 claims description 45
- 150000001875 compounds Chemical class 0.000 claims description 41
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical group O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims description 41
- 230000003078 antioxidant effect Effects 0.000 claims description 38
- 239000000446 fuel Substances 0.000 claims description 36
- 239000002199 base oil Substances 0.000 claims description 34
- 125000004432 carbon atom Chemical group C* 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 30
- 150000002148 esters Chemical class 0.000 claims description 29
- 239000011575 calcium Substances 0.000 claims description 26
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 25
- 239000002270 dispersing agent Substances 0.000 claims description 24
- 125000000217 alkyl group Chemical group 0.000 claims description 23
- 239000003599 detergent Substances 0.000 claims description 23
- 239000003607 modifier Substances 0.000 claims description 21
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 20
- 229930195733 hydrocarbon Natural products 0.000 claims description 20
- 229960002317 succinimide Drugs 0.000 claims description 20
- 229920001281 polyalkylene Polymers 0.000 claims description 19
- 229920000768 polyamine Polymers 0.000 claims description 19
- 150000002430 hydrocarbons Chemical class 0.000 claims description 18
- 229910052791 calcium Inorganic materials 0.000 claims description 17
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 17
- 230000001050 lubricating effect Effects 0.000 claims description 16
- 239000004215 Carbon black (E152) Substances 0.000 claims description 15
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052725 zinc Inorganic materials 0.000 claims description 13
- 239000011701 zinc Substances 0.000 claims description 13
- 150000001336 alkenes Chemical class 0.000 claims description 12
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 12
- RZRNAYUHWVFMIP-HXUWFJFHSA-N glycerol monolinoleate Natural products CCCCCCCCC=CCCCCCCCC(=O)OC[C@H](O)CO RZRNAYUHWVFMIP-HXUWFJFHSA-N 0.000 claims description 11
- 150000005846 sugar alcohols Polymers 0.000 claims description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 10
- BRESEFMHKFGSDY-UHFFFAOYSA-N molybdenum;pyrrolidine-2,5-dione Chemical group [Mo].O=C1CCC(=O)N1 BRESEFMHKFGSDY-UHFFFAOYSA-N 0.000 claims description 10
- 239000004711 α-olefin Substances 0.000 claims description 9
- 150000001412 amines Chemical class 0.000 claims description 8
- 239000012990 dithiocarbamate Substances 0.000 claims description 8
- RREANTFLPGEWEN-MBLPBCRHSA-N 7-[4-[[(3z)-3-[4-amino-5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidin-2-yl]imino-5-fluoro-2-oxoindol-1-yl]methyl]piperazin-1-yl]-1-cyclopropyl-6-fluoro-4-oxoquinoline-3-carboxylic acid Chemical compound COC1=C(OC)C(OC)=CC(CC=2C(=NC(\N=C/3C4=CC(F)=CC=C4N(CN4CCN(CC4)C=4C(=CC=5C(=O)C(C(O)=O)=CN(C=5C=4)C4CC4)F)C\3=O)=NC=2)N)=C1 RREANTFLPGEWEN-MBLPBCRHSA-N 0.000 claims description 7
- 239000003502 gasoline Substances 0.000 claims description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 7
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 5
- 125000003118 aryl group Chemical group 0.000 claims description 5
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims description 5
- 235000021317 phosphate Nutrition 0.000 claims description 5
- 150000003017 phosphorus Chemical class 0.000 claims description 5
- 125000002843 carboxylic acid group Chemical group 0.000 claims description 4
- 125000005541 phosphonamide group Chemical group 0.000 claims description 4
- 150000008039 phosphoramides Chemical class 0.000 claims description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 claims description 2
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 2
- 125000005619 boric acid group Chemical group 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 2
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 claims 1
- 150000003003 phosphines Chemical class 0.000 claims 1
- 125000005538 phosphinite group Chemical group 0.000 claims 1
- XRBCRPZXSCBRTK-UHFFFAOYSA-N phosphonous acid Chemical class OPO XRBCRPZXSCBRTK-UHFFFAOYSA-N 0.000 claims 1
- 239000003921 oil Substances 0.000 description 87
- 235000019198 oils Nutrition 0.000 description 87
- 238000012360 testing method Methods 0.000 description 44
- 235000006708 antioxidants Nutrition 0.000 description 37
- 229910052750 molybdenum Inorganic materials 0.000 description 29
- 239000011733 molybdenum Substances 0.000 description 29
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 21
- 229940014800 succinic anhydride Drugs 0.000 description 20
- 239000002585 base Substances 0.000 description 19
- 239000000654 additive Substances 0.000 description 18
- 238000007254 oxidation reaction Methods 0.000 description 18
- 150000003871 sulfonates Chemical class 0.000 description 18
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical class ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 17
- 230000003647 oxidation Effects 0.000 description 17
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 16
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- 239000002253 acid Substances 0.000 description 15
- 239000000314 lubricant Substances 0.000 description 15
- 239000010705 motor oil Substances 0.000 description 15
- 239000000047 product Substances 0.000 description 15
- 150000003839 salts Chemical class 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 150000003460 sulfonic acids Chemical class 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- RZRNAYUHWVFMIP-KTKRTIGZSA-N 1-oleoylglycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-KTKRTIGZSA-N 0.000 description 11
- 230000002378 acidificating effect Effects 0.000 description 11
- 235000014113 dietary fatty acids Nutrition 0.000 description 11
- 239000000194 fatty acid Substances 0.000 description 11
- 229930195729 fatty acid Natural products 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000003112 inhibitor Substances 0.000 description 10
- 239000005078 molybdenum compound Substances 0.000 description 10
- 150000002752 molybdenum compounds Chemical class 0.000 description 10
- 229910017464 nitrogen compound Inorganic materials 0.000 description 10
- 150000002830 nitrogen compounds Chemical class 0.000 description 10
- 239000003208 petroleum Substances 0.000 description 10
- 239000011541 reaction mixture Substances 0.000 description 10
- 239000005977 Ethylene Substances 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 8
- 150000007513 acids Chemical class 0.000 description 8
- 150000001298 alcohols Chemical class 0.000 description 8
- 125000001931 aliphatic group Chemical group 0.000 description 8
- 125000002947 alkylene group Chemical group 0.000 description 8
- 239000001993 wax Substances 0.000 description 8
- 150000008055 alkyl aryl sulfonates Chemical class 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000009472 formulation Methods 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 7
- 229920013639 polyalphaolefin Polymers 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 229920006395 saturated elastomer Polymers 0.000 description 7
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 150000001408 amides Chemical class 0.000 description 6
- 229910052788 barium Inorganic materials 0.000 description 6
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 6
- SRSXLGNVWSONIS-UHFFFAOYSA-M benzenesulfonate Chemical compound [O-]S(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-M 0.000 description 6
- 229940077388 benzenesulfonate Drugs 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- UYMKPFRHYYNDTL-UHFFFAOYSA-N ethenamine Chemical compound NC=C UYMKPFRHYYNDTL-UHFFFAOYSA-N 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 150000002751 molybdenum Chemical class 0.000 description 6
- 239000005077 polysulfide Substances 0.000 description 6
- 229920001021 polysulfide Polymers 0.000 description 6
- 150000008117 polysulfides Polymers 0.000 description 6
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 6
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004480 active ingredient Substances 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
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- 230000032050 esterification Effects 0.000 description 5
- 238000005886 esterification reaction Methods 0.000 description 5
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- 239000006260 foam Substances 0.000 description 5
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- 239000002904 solvent Substances 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical class OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 5
- 239000010689 synthetic lubricating oil Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
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- 238000002835 absorbance Methods 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 125000003342 alkenyl group Chemical group 0.000 description 4
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 4
- 239000011609 ammonium molybdate Substances 0.000 description 4
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- 229940010552 ammonium molybdate Drugs 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
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- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 description 4
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- 239000001384 succinic acid Substances 0.000 description 4
- RINCXYDBBGOEEQ-UHFFFAOYSA-N succinic anhydride Chemical class O=C1CCC(=O)O1 RINCXYDBBGOEEQ-UHFFFAOYSA-N 0.000 description 4
- 150000003463 sulfur Chemical class 0.000 description 4
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- 229960001124 trientine Drugs 0.000 description 4
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- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
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- 230000029936 alkylation Effects 0.000 description 3
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- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
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- LMODBLQHQHXPEI-UHFFFAOYSA-N dibutylcarbamothioylsulfanylmethyl n,n-dibutylcarbamodithioate Chemical compound CCCCN(CCCC)C(=S)SCSC(=S)N(CCCC)CCCC LMODBLQHQHXPEI-UHFFFAOYSA-N 0.000 description 3
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- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
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- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 2
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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
- 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
- C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
-
- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/24—Emulsion properties
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- C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
- C10N2060/10—Chemical after-treatment of the constituents of the lubricating composition by sulfur or a compound containing sulfur
Definitions
- the present invention relates to a lubricating oil composition for internal combustion engines. More particularly, the present invention relates to a lubricating oil composition having a low phosphorus content that improves fuel economy while also providing high temperature oxidation, piston deposits, and wear.
- ILSAC International Lubricant Standardization and Approval Committee
- the ILSAC GF-4 specifies the minimum performance requirements (both engine sequence and bench tests) and chemical and physical properties for those engine oils that vehicle manufacturers deem necessary for satisfactory equipment performance and life.
- ILSAC GF-4 limits the amount of phosphorus to 0.08 wt % in the finished oil.
- zinc dialkyldithiophosphate a commonly used wear control additive having favorable characteristics as an anti-wear additive.
- phosphorus and sulfur derivatives poison catalyst components of catalytic converters. This is a major concern as effective catalytic converters are needed to reduce pollution and to meet governmental regulations designed to reduce toxic gases such as, for example, hydrocarbons, carbon monoxide and nitrogen oxides, in internal combustion engine exhaust emission.
- Such catalytic converters generally use a combination of catalytic metals, e.g., platinum or variations, and metal oxides, and are installed in the exhaust streams, e.g., the exhaust pipes of automobiles, to convert the toxic gases to nontoxic gases.
- these catalyst components are poisoned by the phosphorus and sulfur components, or the phosphorus and sulfur decomposition product of the zinc dialkyldithiophosphate; and accordingly, the use of engine oils containing phosphorus and sulfur additives may substantially reduce the life and effectiveness of catalytic converters. Therefore, it would be desirable to reduce the phosphorus and sulfur content in the engine oils so as to maintain the activity and extend the life of the catalytic converter.
- U.S. Patent No. 6,696,393, issued February 24, 2004 to Boffa discloses methods and lubricant compositions for reducing wear in internal combustion engines lubricated with a low phosphorus content lubricating oil.
- the lubricant compositions comprise a synergistic combination of a complex of a molybdenum/nitrogen containing compound and at least one phosphorus-containing compound wherein the total phosphorus employed in the composition is no more than about 0.06 weight percent based on the total weight of the composition.
- U.S. Patent No. 6,562,765 issued May 13, 2004 to Boffa , discloses an engine oil having a base oil and a friction reducing amount of an oil soluble sulfurized or unsulfurized oxymolybdenum complex prepared from reacting, in the presence of a polar promoter, an acidic molybdenum compound and a basic nitrogen compound and a low concentration of a sulfurized oxymolybdenum dialkyldithiocarbamate; employed together to provide at least 450 parts per million of molybdenum and less than 175 parts per million of molybdenum from the dialkyldithiocarbamate, both on the basis of the engine oil.
- EP1418220 discloses a lubricating oil composition
- a lubricating oil composition comprising a major amount of a base oil of lubricating viscosity and a minor amount of each of the following: a) from about 3.0 to about 7.0 weight percent of an ethylene carbonated-treated ashless dispersant; b) from about 2.0 to about 5.0 weight percent of a borated-treated ashless dispersant; wherein the weight ratio of a) to b) is about 0.3 to about 0.5; c) from about 1.0 to about 3.0 weight percent of a high overbased metal-containing detergent; d) from about 0.1 to about 2.0 weight percent of a phosphorus-containing compound; wherein the weight percent of total phosphorus in the lubricating oil composition is no more than 0.08 weight percent based on the total weight of the lubricating oil composition.
- EP1422286 discloses a lubricating composition
- a lubricating composition comprising a major amount of an oil of lubricating viscosity, an oil soluble overbased alkaline earth alkyl aryl sulfonate detergent having a total base number (TBN) of about 450 to 550, and an alkenyl succinimide dispersant derived from a 450 to 3000 average molecular weight polyalkylene and a method for improving fuel economy of a gasoline internal combustion engine comprising operating said engine with a lubricating composition comprising a major amount of an oil of lubricating viscosity and a fuel economizing amount of an oil soluble an alkaline earth alkyl aryl sulfonate detergent having a TBN greater than 450 and an alkenyl succinimide dispersant derived from a 450 to 3000 average molecular weight polyalkylene.
- TBN total base number
- the present invention relates to a lubricating oil composition for internal combustion engines which demonstrates improved fuel economy. More particularly, the present invention relates to a low phosphorus lubricating oil composition employing a base oil of lubricating viscosity, a sulfonate detergent, oxymolybdenum-containing complex, a friction modifier and an antioxidant to achieve the fuel economy benefits demonstrated in the lubricating oil composition while also providing high temperature oxidation, piston deposits, and wear.
- the present invention relates to a lubricating oil composition according to claim 1.
- the lubricating oil composition of the present invention may further contain an oil-soluble, phosphorus-containing, anti-wear compound and an alkenyl succinimide dispersant derived from a 450 to 3000 average molecular weight polyalkylene.
- the lubricating oil composition of the present invention provides improved fuel economy while also providing high temperature oxidation, piston deposits, and wear. Accordingly, the present invention is further directed to a method for improving the fuel economy of an internal combustion engine, preferably gasoline, comprising operating said engine with the lubricating oil composition of the present invention.
- the present invention is based upon the surprising discovery that a certain combination of additive components in a low phosphorus lubricating oil composition provides an improvement in fuel economy in comparison to other conventional lubricating oil compositions. More specifically, the low phosphorus lubricating oil composition employing a base oil of lubricating viscosity, sulfonate detergent, a oxymolybdenum-containing complex, a friction modifier and an antioxidant have shown to improve fuel economy while also providing high temperature oxidation, piston deposits, and wear. Therefore, employing such a lubricating oil composition in an engine oil application, gear oil application or other application requiring lubrication, can lead to an improvement in overall fuel economy.
- the fuel economy of an internal combustion engine is improved by employing a certain combination of a base oil of lubricating viscosity, a sulfonate detergent, a oxymolybdenum-containing complex, a friction modifier and an antioxidant in a low phosphorus lubricating oil composition having less than 0.08 wt % phosphorus content, based on the total weight of the lubricating oil composition.
- alkaline earth metal means calcium, barium, magnesium, strontium, or mixtures thereof.
- hydrocarbyl means an alkyl or alkenyl group.
- metal means alkali metals, alkaline earth metals, or mixtures thereof.
- an oil-soluble, phosphorus-containing, anti-wear compound refers to additives in lubricant compositions that contain phosphorus and which exhibit an anti-wear benefit, either alone or when used in combination with other additives, during operation of an internal combustion engine that is lubricated with such a lubricant composition.
- the phosphorus in such additives is typically integral to the additive function.
- total phosphorus refers to the total amount of phosphorus in the lubricant composition regardless of whether such phosphorus is present as part of an oil-soluble, phosphorus-containing, anti-wear compound or in the form of a contaminant in the lubricant composition such as residual phosphorus remaining due to the presence of P 2 S 5 used to prepare metal dihydrocarbyl dithiophosphates. In either event, the amount of phosphorus permitted in the lubricant composition is independent of source. Preferably, however, the phosphorus is part of a lubricant additive.
- Total Base Number refers to the equivalent number of milligrams of KOH needed to neutralize 1 gram of a product. Therefore, a high TBN reflects strongly overbased products and, as a result, a higher base reserve for neutralizing acids.
- the TBN of a product can be determined by ASTM Standard No. D2896 or equivalent procedure.
- Metal detergents have widely been employed in engine oil lubricating formulations to neutralize the acidic by-products of the combustion process and/or lubricant oxidation and to provide a soap effect and keep pistons and other high temperature surfaces clean thus preventing sludge.
- a number of different surfactant types have been used to produce different lubricant detergents. Common examples of metal detergents included: sulfonates, alkylphenates, sulfurized alkyl phenates, carboxylates, salicylates, phosphonates, and phosphinates. Commercial products are generally referred to as neutral or overbased.
- Overbased metal sulfonates are generally produced by carbonating a mixture of hydrocarbons, sulfonic acid, metal oxide or hydroxides (for example calcium oxide or calcium hydroxide) and promoters such as xylene, methanol and water.
- metal oxide or hydroxides for example calcium oxide or calcium hydroxide
- promoters such as xylene, methanol and water.
- the calcium oxide or hydroxide reacts with the gaseous carbon dioxide to form calcium carbonate.
- the sulfonic acid is neutralized with an excess of CaO or Ca(OH) to form the sulfonate.
- the prior art known processes for overbasing calcium sulfonates generally produces high alkaline reserves of TBN of 300 to 400 mg KOH/gm or higher.
- sulfonate also included within the meaning of "sulfonate” are the salts of sulfonic acids of synthetic alkyl aryl compounds, which often are preferred. These acids also are prepared by treating an alkyl aryl compound with sulfuric acid or sulfur trioxide. At least one alkyl substituent of the aryl ring is an oil-solubilizing group, as discussed above. The acids thus obtained are known as synthetic alkyl aryl sulfonic acids and the salts as alkyl aryl sulfonates.
- the sulfonates where the alkyl is straight-chain are the well-known linear alkyl aryl sulfonates.
- Branched olefins can be obtained from the oligo-polymerization of, for example, propylene to C 15 to C 42 hydrocarbons and particularly the propylene tetrapolymer dimerized to a C 24 olefin, or alkylation of aromatics using normal alpha olefins.
- Preferred aryl groups are phenyl and substituted phenyl, preferably tolyl, xylyl, particularly ortho-xylyl, ethyl phenyl, cumenyl and the like.
- the acids obtained by sulfonation are converted to the metal salts by neutralizing with a basic reacting alkali or alkaline earth metal compound to yield the Group I or Group II metal sulfonates.
- the acids are neutralized with an alkali metal base.
- Alkaline earth metal salts are obtained from the alkali metal salt by metathesis.
- the sulfonic acids can be neutralized directly with an alkaline earth metal base.
- the sulfonates may then be overbased and such overbased materials and methods of preparing such materials are known to those skilled in the art. See, for example, LeSuer U.S. Pat. No. 3,496,105, issued Feb. 17, 1970 , particularly Cols. 3 and 4.
- the sulfonates are present in the lubricating oil composition of the present invention in the form of alkaline earth metal salts, or mixtures thereof.
- the alkaline earth metals include magnesium, calcium and barium, of which calcium is preferred.
- the sulfonates are superalkalinized employing excess alkaline metal base carbon dioxide or other suitable base source. Often this is added sequentially or step wise addition with or without a promoter, paying particular attention to the overbasing process since improper overbasing will lead to highly viscous sulfonates or lower overbased than desired.
- the oil-soluble overbased alkaline earth metal alkyl aryl sulfonate detergents are overbased under suitable conditions to substantially produce from 250 to 500 TBN, and most preferably from 300 to 450 TBN.
- TBN can be measured according to ASTM D2986.
- Particularly preferred for overbasing are calcium oxide and/or calcium hydroxide with carbon dioxide to produce an overbased calcium sulfonate.
- the sulfonate detergent have a kinematic viscosity at 100°C of less than 500cSt, preferably less than 350cSt, preferably less than 250cSt and more preferably less than 200cSt and even more preferably less than 180cSt.
- salts of the petroleum sulfonic acids particularly the petroleum sulfonic acids which are obtained by sulfonating various hydrocarbon fractions such as lubricating oil fractions and extracts rich in aromatics which are obtained by extracting a hydrocarbon oil with a selective solvent, which extracts may, if desired, be alkylated before sulfonation by reacting them with olefins or alkyl chlorides by means of an alkylation catalyst; organic polysulfonic acids such as benzene disulfonic acid which may or may not be alkylated; and the like.
- the preferred salts for use in the present invention are those of alkylated aromatic sulfonic acids in which the alkyl radical or radicals contain at least about 8 carbon atoms, for example from about 8 to 40 carbon atoms.
- Another preferred group of sulfonate starting materials are the aliphatic-substituted cyclic sulfonic acids in which the aliphatic substituents or substituents contain a total of at least 12 carbon atoms, such as the alkyl aryl sulfonic acids, alkyl cycloaliphatic sulfonic acids, the alkyl heterocyclic sulfonic acids and aliphatic sulfonic acids in which the aliphatic radical or radicals contain a total of at least 12 carbon atoms.
- oil-soluble sulfonic acids include petroleum sulfonic acid, petrolatum sulfonic acids, mono- and poly-wax-substituted naphthalene sulfonic acids, substituted sulfonic acids, such as cetyl benzene sulfonic acids, cetyl phenyl sulfonic acids, and the like, aliphatic sulfonic acid, such as paraffin wax sulfonic acids, hydroxy-substituted paraffin wax sulfonic acids, etc., cycloaliphatic sulfonic acids, petroleum naphthalene sulfonic acids, cetyl cyclopentyl sulfonic acid, mono- and poly-wax-substituted cyclohexyl sulfonic acids, and the like.
- Typical Group II metal sulfonates suitable for use in this composition include the metal sulfonates exemplified as follows: calcium white oil benzene sulfonate, barium white oil benzene sulfonate, magnesium white oil benzene sulfonate, calcium dipolypropene benzene sulfonate, barium dipolypropene benzene sulfonate, magnesium dipolypropene benzene sulfonate, calcium mahogany petroleum sulfonate, barium mahogany petroleum sulfonate, magnesium mahogany petroleum sulfonate, calcium triacontyl sulfonate, magnesium triacontyl sulfonate, calcium lauryl sulfonate, barium lauryl sulfonate,
- synthetic alkyl aryl sulfonates are also preferred. Particularly useful are synthetic alkyl aryl sulfonates having the aryl sulfonate attached at the 1 or 2 position of the alkyl group, preferably greater than 5 mole %, more preferably greater than 13 mole % and more preferably greater than 20 mole %, as these have shown good compatibility and solubility while not forming a skin at these levels of overbasing. Preferred are linear monoalkyl sulfonates.
- the alkyl chain contains between 14 and 40 carbons and more preferably the alkyl aryl sulfonate is derived from a C 14 -C 40 normal alpha olefin and more particularly from a C 20 -C 28 or a C 20 -C 24 normal alpha olefin.
- Mixtures of high TBN sulfonates can be employed including mixtures of natural sulfonates and synthetic sulfonates, mixtures of synthetic sulfonates such as mixtures of monoalkyl and dialkyl sulfonates, mixtures of monoalkyl and polyalkyl sulfonates or mixtures of dialkyl and polyalkyl sulfonates.
- the overbased alkaline earth metal alkyl aryl sulfonate detergent will generally have a TBN from 250 to 500, and more preferably 300 to 450.
- the overbased alkaline earth metal alkyl aryl sulfonate detergent comprises from about 0.1 to10 wt % and preferably 0.5 to 3.0 wt %, based on the total weight of the lubricating oil composition.
- the unsulfurized or sulfurized oxymolybdenum-containing composition employed in the present invention may be generally characterized as a oxymolybdenum complex of a basic nitrogen compound.
- Such molybdenum/sulfur complexes are known in the art and are described, for example, in U.S. Pat. No. 4,263,152 to King et al.
- The.structure of the molybdenum compositions employed in this invention are not known with certainty; however, they are believed to be compounds in which molybdenum, whose valences are satisfied with atoms of oxygen or sulfur, is either complexed by, or the salt of, one or more nitrogen atoms of the basic nitrogen containing compound used in the preparation of these compositions.
- the molybdenum compounds used to prepare the oxymolybdenum and oxymolybdenum/sulfur complexes employed in the present invention are acidic molybdenum compounds.
- acidic is meant that the molybdenum compounds will react with a basic nitrogen compound as measured by ASTM test D-664 or D-2896 titration procedure.
- molybdenum compounds are hexavalent and are represented by the following compositions: molybdic acid, ammonium molybdate, sodium molybdate, potassium molybdate and other alkaline metal molybdates and other molybdenum salts such as hydrogen salts, e.g., hydrogen sodium molybdate, MoOCl 4 , MoO 2 Br 2 , Mo 2 O 3 Cl 6 , molybdenum trioxide or similar acidic molybdenum compounds.
- Preferred acidic molybdenum compounds are molybdic acid, ammonium molybdate, and alkali metal molybdates. Particularly preferred are molybdic acid and ammonium molybdate.
- the basic nitrogen compound used to prepare the oxymolybdenum complexes have at least one basic nitrogen and are preferably oil-soluble.
- Typical examples of such compositions are succinimides, carboxylic acid amides, hydrocarbyl monoamines, hydrocarbon polyamines, Mannich bases, phosphoramides, thiophosphoramides, phosphonamides, dispersant viscosity index improvers, and mixtures thereof.
- Any of the nitrogen-containing compositions may be after-treated with, e.g., boron, using procedures well known in the art so long as the compositions continue to contain basic nitrogen. These after-treatments are particularly applicable to succinimides and Mannich base compositions.
- succinimide The mono and polysuccinimides that can be used to prepare the molybdenum complexes described herein are disclosed in numerous references and are well known in the art. Certain fundamental types of succinimides and the related materials encompassed by the term of art "succinimide” are taught in U.S. Pat. No's. 3,219,666; 3,172,892; and 3,272,746.
- succinimide is understood in the art to include many of the amide, imide, and amidine species which may also be formed. The predominant product however is a succinimide and this term has been generally accepted as meaning the product of a reaction of an alkenyl substituted succinic acid or anhydride with a nitrogen-containing compound.
- Preferred succinimides because of their commercial availability, are those succinimides prepared from a hydrocarbyl succinic anhydride, wherein the hydrocarbyl group contains from about 24 to about 350 carbon atoms, and an ethylene amine, said ethylene amines being especially characterized by ethylene diamine, diethylene triamine, triethylene tetramine, and tetraethylene pentamine.
- Particularly preferred are those succinimides prepared from polyisobutenyl succinic anhydride of 70 to 128 carbon atoms and tetraethylene pentamine or triethylene tetramine or mixtures thereof.
- succinimide also included within the term “succinimide” are the cooligomers of a hydrocarbyl succinic acid or anhydride and a poly secondary amine containing at least one tertiary amino nitrogen in addition to two or more secondary amino groups. Ordinarily this composition has between 1500 and 50000 average molecular weight.
- a typical compound would be that prepared by reacting polyisobutenyl succinic anhydride and ethylene dipiperazine.
- Carboxylic acid amide compositions are also suitable starting materials for preparing the oxymolybdenum complexes employed in this invention. Typical of such compounds are those disclosed in U.S. Pat. No. 3,405,064 . These compositions are ordinarily prepared by reacting a carboxylic acid or anhydride or ester thereof, having at least 12 to about 350 aliphatic carbon atoms in the principal aliphatic chain and, if desired, having sufficient pendant aliphatic groups to render the molecule oil soluble with an amine or a hydrocarbyl polyamine, such as an ethylene amine, to give a mono or polycarboxylic acid amide.
- hydrocarbyl monoamines and hydrocarbyl polyamines preferably of the type disclosed in U.S. Pat. No. 3,574,576 .
- the hydrocarbyl group which is preferably alkyl, or olefinic having one or two sites of unsaturation, usually contains from about 9 to 350, preferably from about 20 to 200 carbon atoms.
- hydrocarbyl polyamines are those which are derived, e.g., by reacting polyisobutenyl chloride and a polyalkylene polyamine, such as an ethylene amine, e.g., ethylene diamine, diethylene triamine, tetraethylene pentamine, 2-aminoethylpiperazine, 1,3-propylene diamine, 1,2-propylenediamine, and the like.
- a polyalkylene polyamine such as an ethylene amine, e.g., ethylene diamine, diethylene triamine, tetraethylene pentamine, 2-aminoethylpiperazine, 1,3-propylene diamine, 1,2-propylenediamine, and the like.
- Mannich base compositions Another class of compounds useful for supplying basic nitrogen are the Mannich base compositions. These compositions are prepared from a phenol or C 9-200 alkylphenol, an aldehyde, such as formaldehyde or formaldehyde precursor such as paraformaldehyde, and an amine compound.
- the amine may be a mono or polyamine and typical compositions are prepared from an alkylamine, such as methylamine or an ethylene amine, such as, diethylene triamine, or tetraethylene pentamine, and the like.
- the phenolic material may be sulfurized and preferably is dodecylphenol or a C 80-100 alkylphenol.
- Typical Mannich bases which can be used in this invention are disclosed in U.S. Pat. Nos.
- Mannich bases prepared by reacting an alkylphenol having at least 50 carbon atoms, preferably 50 to 200 carbon atoms with formaldehyde and an alkylene polyamine HN(ANH) n H where A is a saturated divalent alkyl hydrocarbon of from about 2 to 6 carbon atoms and n is from about 1-10 and where the condensation product of said alkylene polyamine may be further reacted with urea or thiourea.
- A is a saturated divalent alkyl hydrocarbon of from about 2 to 6 carbon atoms and n is from about 1-10 and where the condensation product of said alkylene polyamine may be further reacted with urea or thiourea.
- the utility of these Mannich bases as starting materials for preparing lubricating oil additives can often be significantly improved by treating the Mannich base using conventional techniques to introduce boron into the composition.
- compositions useful for preparing the oxymolybdenum complexes employed in this invention are the phosphoramides and phosphonamides such as those disclosed in U.S. Pat. Nos. 3,909,430 and 3,968,157 .
- These compositions may be prepared by forming a phosphorus compound having at least one P-N bond. They can be prepared, for example, by reacting phosphorus oxychloride with a hydrocarbyl diol in the presence of a monoamine or by reacting phosphorus oxychloride with a difunctional secondary amine and a mono-functional amine.
- Thiophosphoramides can be prepared by reacting an unsaturated hydrocarbon compound containing from about 2 to 450 or more carbon atoms, such as polyethylene, polyisobutylene, polypropylene, ethylene, 1-hexene, 1,3-hexadiene, isobutylene, 4-methyl-1-pentene, and the like, with phosphorus pentasulfide and a nitrogen-containing compound as defined above, particularly an alkylamine, alkyldiamine; alkylpolyamine, or an alkyleneamine, such as ethylene diamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and the like.
- an unsaturated hydrocarbon compound containing from about 2 to 450 or more carbon atoms
- an unsaturated hydrocarbon compound containing from about 2 to 450 or more carbon atoms such as polyethylene, polyisobutylene, polypropylene, ethylene, 1-hexene, 1,3-hexadiene, isobutylene
- VI improvers dispersant viscosity index improvers
- hydrocarbon polymer especially a polymer derived from ethylene and/or propylene, optionally containing additional units derived from one or more co-monomers such as alicyclic or aliphatic olefins or diolefins.
- the functionalization may be carried out by a variety of processes which introduce a reactive site or sites which usually has at least one oxygen atom on the polymer.
- the polymer is then contacted with a nitrogen-containing source to introduce nitrogen-containing functional groups on the polymer backbone.
- Commonly used nitrogen sources include any basic nitrogen compound especially those nitrogen-containing compounds and compositions described herein.
- Preferred nitrogen sources are alkylene amines, such as ethylene amines, alkyl amines, and Mannich bases.
- Preferred basic nitrogen compounds for use in this invention are succinimides, carboxylic acid amides, and Mannich bases. More preferred are succinimides having an average molecular weight of 1000 or 1300 or 2300 and mixtures thereof. Such succinimides can be post treated with boron or ethylene carbonate as known in the art.
- the oxymolybdenum complexes of this invention can also be sulfurized.
- Representative sulfur sources for preparing the oxymolybdenum/sulfur complexes used in this invention are sulfur, hydrogen sulfide, sulfur monochloride, sulfur dichloride, phosphorus pentasulfide, R" 2 S x where R" is hydrocarbyl, preferably C 1-40 alkyl, and x is at least 2, inorganic sulfides and polysulfides such as (NH 4 ) 2 S y , where y is at least 1, thioacetamide, thiourea, and mercaptans of the formula R"SH where R" is as defined above.
- sulfurizing agents are traditional sulfur-containing antioxidants such as wax sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic and esters and sulfurized ester-olefins, and sulfurized alkylphenols and the metal salts thereof.
- the sulfurized fatty acid esters are prepared by reacting sulfur, sulfur monochloride, and/or sulfur dichloride with an unsaturated fatty ester under elevated temperatures.
- Typical esters include C 1 -C 20 alkyl esters of C 8 -C 24 unsaturated fatty acids, such as palmitoleic, oleic, ricinoleic, petroselinic, vaccenic, linoleic, linolenic, oleostearic, licanic, paranaric, tariric, gadoleic, arachidonic, cetoleic, etc.
- mixed unsaturated fatty acid esters such as are obtained from animal fats and vegetable oils, such as tall oil, linseed oil, olive oil, caster oil, peanut oil, rape oil, fish oil, sperm oil, and so forth.
- Exemplary fatty esters include lauryl tallate, methyl oleate, ethyl oleate, lauryl oleate, cetyl oleate, cetyl linoleate, lauryl ricinoleate, oleyl linoleate, oleyl stearate, and alkyl glycerides.
- Cross-sulfurized ester olefins such as a sulfurized mixture of C 10 -C 25 olefins with fatty acid esters of C 10 -C 25 fatty acids and C 10 -C 25 alkyl or alkenyl alcohols, wherein the fatty acid and/or the alcohol is unsaturated may also be used.
- Sulfurized olefins are prepared by the reaction of the C 3 -C 6 olefin or a low-molecular-weight polyolefin derived therefrom with a sulfur-containing compound such as sulfur, sulfur monochloride, and/or sulfur dichloride.
- aromatic and alkyl sulfides such as dibenzyl sulfide, dixylyl sulfide, dicetyl sulfide, diparaffin wax sulfide and polysulfide, cracked wax-olefin sulfides and so forth.
- They can be prepared by treating the starting material, e.g., olefinically unsaturated compounds, with sulfur, sulfur monochloride, and sulfur dichloride.
- the paraffin wax thiomers described in U.S. Pat. No. 2,346,156 .
- Sulfurized alkyl phenols and the metal salts thereof include compositions such as sulfurized dodecylphenol and the calcium salts thereof.
- the alkyl group ordinarily contains from about 9 to 300 carbon atoms.
- the metal salt may be preferably, a Group I or Group II salt, especially sodium, calcium, magnesium, or barium.
- Preferred sulfur sources are sulfur, hydrogen sulfide, phosphorus pentasulfide, R"' 2 S 2 where R" is hydrocarbyl, preferably C 1 -C 10 alkyl, and z is at least 3, mercaptans wherein R" is C 1 -C 10 alkyl, inorganic sulfides and polysulfides, thioacetamide, and thiourea.
- Most preferred sulfur sources are sulfur, hydrogen sulfide, phosphorus pentasulfide, and inorganic sulfides and polysulfides.
- the polar promoter used in the preparation of the molybdenum complexes employed in this invention is one which facilitates the interaction between the acidic molybdenum compound and the basic nitrogen compound.
- a wide variety of such promoters are well known to those skilled in the art.
- Typical promoters are 1,3-propanediol, 1,4-butane-diol, diethylene glycol, butyl cellosolve, propylene glycol, 1,4-butyleneglycol, methyl carbitol, ethanolamine, diethanolamine, N-methyl-diethanol-amine, dimethyl formamide, N-methyl acetamide, dimethyl acetamide, methanol, ethylene glycol, dimethyl sulfoxide, hexamethyl phosphoramide, tetrahydrofuran and water.
- Preferred are water and ethylene glycol. Particularly preferred is water.
- the polar promoter is separately added to the reaction mixture, it may also be present, particularly in the case of water, as a component of non-anhydrous starting materials or as waters of hydration in the acidic molybdenum compound, such as (NH 4 ) 6 Mo 7 O 24 ⁇ H 2 O. Water may also be added as ammonium hydroxide.
- a method for preparing the oxymolybdenum complexes used in this invention is to prepare a solution of the acidic molybdenum precursor and a polar promoter with a basic nitrogen-containing compound with or without diluent.
- the diluent is used, if necessary, to provide a suitable viscosity for easy stirring.
- Typical diluents are lubricating oil and liquid compounds containing only carbon and hydrogen.
- ammonium hydroxide may also be added to the reaction mixture to provide a solution of ammonium molybdate. This reaction is carried out at a variety of temperatures, typically at or below the melting point of the mixture to reflux temperature. It is ordinarily carried out at atmospheric pressure although higher or lower pressures may be used if desired.
- This reaction mixture may optionally be treated with a sulfur source as defined above at a suitable pressure and temperature for the sulfur source to react with the acidic molybdenum and basic nitrogen compounds. In some cases, removal of water from the reaction mixture may be desirable prior to completion of reaction with the sulfur source.
- the reactor is agitated and heated at a temperature less than or equal to about 120°C, preferably from about 70°C to about 90°C.
- Molybdic oxide or other suitable molybdenum source is then charged to the reactor and the temperature is maintained at a temperature less than or equal to about 120°C, preferably at about 70°C to about 90°C, until the molybdenum is sufficiently reacted.
- Excess water is removed from the reaction mixture. Removal methods include but are not limited to vacuum distillation or nitrogen stripping while maintaining the temperature of the reactor at a temperature less than or equal to about 120°C, preferably between about 70°C to about 90°C.
- the temperature during the stripping process is held at a temperature less than or equal to about 120°C to maintain the low color intensity of the molybdenum-containing composition. It is ordinarily carried out at atmospheric pressure although higher or lower pressures may be used.
- the stripping step is typically carried out for a period of about 0.5 to about 5 hours.
- this product can be sulfurized by treating this reaction mixture with a sulfur source as defined above at a suitable pressure and temperature, not to exceed about 120°C for the sulfur source to react with the acidic molybdenum and basic nitrogen compounds.
- the sulfurization step is typically carried out for a period of from about 0.5 to about 5 hours and preferably from about 0.5 to about 2 hours.
- removal of the polar promoter (water) from the reaction mixture may be desirable prior to completion of reaction with the sulfur source.
- the oxymolybdenum complex and oxymolybdenum/sulfur complex produced by such method is lighter in color (when compared to complexes prepared at higher temperatures) while maintaining good fuel economy, excellent oxidation inhibition, and anti-wear performance qualities.
- Color in this instance can be more visibly or more quantifiably using a UV spectrophotometer such as a Perkin-Elmer Lambda 18 UV-Visible Double-Beam Spectrophotometer.
- a UV spectrophotometer such as a Perkin-Elmer Lambda 18 UV-Visible Double-Beam Spectrophotometer.
- this test recorded the visible spectra of molybdenum compositions at a constant concentration in an isooctane solvent. The spectra represent the absorbance intensity plotted versus the wavelength in nanometers. The spectra extend from the visible region into the near infrared region of the electromagnetic radiation (350 nanometers to 900 nanometers). In this test, the highly colored samples showed increasingly higher absorbance at increasingly higher wavelengths at a constant molybdenum concentration.
- the preparation of the sample for color measurement comprises diluting the molybdenum-containing composition with isooctane to achieve a constant molybdenum concentration of 0.00025 g molybdenum per gram of the molybdenum-containing composition/isooctane mixture.
- the spectrophotometer Prior to sample measurement the spectrophotometer is referenced by scanning air versus air. The UV visible spectrum from 350 nanometers to 900 nanometers is obtained using a one centimeter path-length quartz cell versus an air reference. The spectra are offset corrected by setting the 867 nanometer absorbance to zero. Then the absorbance of the sample is determined at 350 nanometers wavelength.
- the ratio of molybdenum compound to basic nitrogen compound is not critical; however, as the amount of molybdenum with respect to basic nitrogen increases, the filtration of the product becomes more difficult. Since the molybdenum component probably oligomerizes, it is advantageous to add as much molybdenum as can easily be maintained in the composition.
- the reaction mixture will have charged to it from about 0.01 to 2.00 atoms of molybdenum per basic nitrogen atom. Preferably from about 0.3 to 1.0, and most preferably from about 0.4 to 0.7, atoms of molybdenum per atom of basic nitrogen is added to the reaction mixture.
- the sulfurized oxymolybdenum containing compositions may be generally characterized as a sulfur/molybdenum complex of a basic nitrogen dispersant compound preferably with a sulfur to molybdenum weight ratio of from about (0.01 to 1.0) to 1 and more preferably from about (0.05 to 0.5) to 1 and a nitrogen to molybdenum weight ratio of from about (1 to 10) to 1 and more preferably from about (2 to 5) to 1.
- the sulfur to molybdenum weight ratio can be from about (0.01 to 0.08) to 1.
- the oxymolybdenum-containing complex comprises from 0.02 to 10 wt % and preferably from 0.1 to 2.0 wt %, based on the total weight of the lubricating oil composition.
- Friction modifiers include such compounds as aliphatic carboxylic acids, aliphatic carboxylic esters of polyols such as glycerol esters of fatty acid as exemplified by glycerol oleate, boric esters of glycerol fatty acid monoesters, aliphatic phosphonates, aliphatic phosphates, aliphatic thiophosphonates, aliphatic thiophosphates, etc., wherein the aliphatic group usually contains above about eight carbon atoms so as to render the compound suitably oil soluble.
- suitable friction modifiers are found in U.S. Pat. No. 3,933,659 which discloses fatty acid esters; U.S. Pat. No.
- 4,530,771 and 5,629,272 which is a preferred borated glycerol monooleate comprising esters constituted with a glycerol, fatty acid and a boric acid, said ester having a positive amount up to 2.0 moles of a carboxylic acid residue comprising a saturated or unsaturated alkyl group having from about 8 to 24 carbon atoms and from about 1.5 to 2.0 moles of a glycerol residue, both per unit mole of a boric acid residue on average of the boric esters used singly or in combination, molar proportion between said carboxylic acid residue and said glycerol residue being that the glycerol residue is 1.2 moles or more based on 1 mole of the carboxylic acid residue;
- U.S. Pat. No. 3,779,928 which discloses alkane phosphonic acid salts.
- the friction modifier employed in the lubricating oil composition of the present invention is a boric acid derivative of an ester of a carboxylic acid and a polyhydric alcohol.
- the ester component employed in the present fuel composition is an ester of a carboxylic acid and a polyhydric alcohol, wherein the carboxylic acid has from one to four carboxylic acid groups and from 8 to 50 carbon atoms and the polyhydric alcohol has from 2 to 50 carbon atoms and from 2 to 6 hydroxy groups.
- the carboxylic acid employed in the preparation of the ester compound will generally be an aliphatic saturated or unsaturated, straight chain or branched chain, mono- or polycarboxylic acid having from 1 to 4 carboxylic acid groups and from 8 to 50 carbon atoms. When the carboxylic acid is a monocarboxylic acid, it will preferably contain from 8 to 30 carbon atoms, more preferably from 10 to 28 carbon atoms, and most preferably from about 10 to about 22 carbon atoms.
- saturated monocarboxylic acids include those having from 10 to 22 carbon atoms, such as capric, lauric, myristic, palmitic, stearic and behenic acid.
- unsaturated monocarboxylic acids include those having from 10 to 22 carbon atoms, such as oleic, elaidic, palmitoleic, petroselic, eleostearic, linoleic, linolenic, erucic and hypogaeic acid.
- the carboxylic acid is a polycarboxylic acid
- it generally will be an aliphatic saturated or unsaturated polycarboxylic acid having from 2 to 4, preferably from 2 to 3, and more preferably 2 carboxylic acid groups.
- An example of a suitable dicarboxylic acid is dodecenyl succinic acid.
- the carboxylic acid is oleic acid.
- the alcohol used in the preparation of the ester compound is generally an aliphatic, saturated or unsaturated, straight chain or branched chain polyhydric alcohol having from 2 to 6 hydroxy groups and from 2 to 50 carbon atoms, preferably, from 2 to 30 carbon atoms, and more preferably, from 2 to 12 carbon atoms.
- Suitable polyhydric alcohols include dihydroxy alcohols, such as the alkylene glycols, for example, ethylene glycol and propylene glycol, trihydroxy alcohols, such as glycerol, tetrahydroxy alcohols, such as pentaerythritol, and hexahydroxy alcohols, such as sorbitol.
- the carboxylic acid and polyhydric alcohol are reacted under typical esterification conditions well known in the art to provide the esters employed in the present invention.
- esters of polyhydric alcohols that may be used are those where all of the hydroxy groups are esterified, as well as those where not all of the hydroxy groups are esterified.
- esters prepared from trihydric alcohols and one or more of the above-mentioned saturated or unsaturated carboxylic acids such as glycerol monoesters and glycerol diesters, e.g. glycerol monooleate, glycerol dioleate and glycerol monostearate.
- Such polyhydric esters may be prepared by esterification as described in the art and/or may be commercially available.
- the ester may have one or more free hydroxy groups.
- Preferred esters which are suitable for use in the present invention include glycerol monooleate, pentaerythritol monooleate and sorbitan monooleate, particularly glycerol monooleate and pentaerythritol monooleate.
- Boric acid derivatives of the ester of the carboxylic acid and polyhydric alcohol are particularly useful in the lubricating oil composition of the present invention.
- Suitable boric acid esters are disclosed in U.S. Pat. Nos. 4,530,771 and 5,629,272 , cited above.
- the friction modifier employed in the lubricating oil of the present invention is borated glycerol monooleate.
- the friction modifier is incorporated in the lubricating oil composition of the present invention in an amount of from 0.1 to 5 wt. %, based on the total weight of the lubricating oil composition. Preferably, from 0.2 to 1.5 wt %, based on the total weight of the lubricating oil composition, of the friction modifier may be used.
- an oxidation inhibitor or antioxidant is employed in the lubricating oil composition of the present invention.
- Antioxidants reduce the tendency of base stocks to deteriorate in service, which deterioration can be evidenced by the products of oxidation such as sludge and varnish-like deposits on the metal surfaces and by viscosity growth.
- the antioxidant employed in the lubricating oil composition is selected from the group consisting of a diphenylamine type, a sulfur-containing compound and mixtures thereof.
- Diphenylamine type antioxidant employable in the present invention may be selected form the group consisting of alkylated diphenylamine, phenyl- ⁇ - naphthylamine, and alkylated- ⁇ -naphthylamine.
- the diphenylamine type antioxidant is an alkylated diphenylamine.
- the antioxidant employed in the lubricating oil of the present invention may also be a sulfur-containing compound such as, but is not limited to, alkaline earth metal salts of alkylphenolthioesters having preferably C 5 to C 12 alkyl side chains, calcium nonylphenol sulfides, ashless oil-soluble phenates and sulfurized phenates, phosphosulfurized or sulfurized hydrocarbons, wax sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acids and esters, sulfurized ester-olefins, sulfurized alkylphenols, phosphorus esters, metal thiocarbamates or dithiocarbamates wherein the metal is zinc, copper or molybdenum, ashless thiocarbamates or dithiocarbamates (i.e., essentially metal free) such as methylenebis(dialkyldithiocarbamate), ethylenebis(dialkyldithiocarbamate), and isobuty
- Examples of preferred ashless dithiocarbamates are methylenebis(dibutyldithiocarbamate), ethylenebis(dibutylthiocarbamate) and isobutyl disulfide-2,2'-bis(dibutyldithiocarbamate).
- the sulfur-containing antioxidant is a thiocarbamate or dithiocarbamate. More preferably, the sulfur-containing antioxidant is a dithiocarbamate.
- the oxidation inhibitors may be use singly or in combination with each other or in combination with other types of oxidation inhibitors.
- the antioxidant comprises from 0.2 to 10 wt % and preferably 0.5 to 2.5 wt %, based on the total weight of the lubricating oil composition.
- the lubricating oil composition of the present invention is notably effective at reducing deposits when the total concentration of the oxymolybdenum-containing complex and the antioxidant is at least 1.3 wt %, preferably at least 1.45 wt %, based on the total weight of the lubricating oil composition.
- the lubricating oil composition of the present invention may also contain an oil -soluble, phosphorus-containing, ant-wear compound.
- a metal dihydrocarbyl dithiophosphate is added to the lubricant composition.
- the metal is preferably zinc.
- the dihydrocarbyldithiophosphate may be present in amount of from about 0.1 to 2 wt % but typically low phosphorus compositions are desired so the dihydrocarbyldithiophosphate is employed at from about 0.25 to 1.2 wt %, preferably from about 0.5 to 0.7 wt %, in the lubricating oil composition.
- zinc dialkylthiophosphate ZDDP
- Such compounds may be prepared in accordance with known techniques by first forming .a dithiophosphoric acid, usually by reaction of an alcohol or a phenol with P 2 S 5 and then neutralizing the dithiophosphoric acid with a suitable zinc compound.
- Mixtures of alcohols may be used including mixtures of primary and secondary alcohols. Examples of such alcohols include, but are not restricted to the following list: iso-propanol, iso-octanol, 2-butanol, methyl isobutyl carbinol (4-methyl-1-pentane-2-ol), 1-pentanol, 2-methyl butanol, and 2-methyl-1-propanol.
- the hydrocarbyl groups can be a primary, secondary, or mixtures thereof, e.g. the compounds may contains primary and/or secondary alkyl groups derived from primary or secondary carbon atoms. Moreover, when employed, there is preferably at least 50, more preferably 75 or more, most preferably from about 85 to 100, mass % secondary alkyl groups; an example is a ZDDP having 85 mass % secondary alkyl groups and 15 mass % primary alkyl groups, such as a ZDDP made from 85 mass % butan-2-ol and 15 mass % iso-octanol. Even more preferred is a ZDDP derived from derived from sec-butanol and methylisobutylcarbinol and most preferably wherein the sec-butanol is 75 mole percent.
- the metal dihydrocarbyldithiophosphate provides most if not all, of the phosphorus content of the lubricating oil composition. Amounts are present in the lubricating oil composition to provide a phosphorus content, expressed as mass % elemental phosphorus, of 0.08 or less, preferably 0.06 or less, and more preferably 0.05.
- the oil-soluble, phosphorus-containing, anti-wear compound comprises from about 0.1 to 2.0 wt % and preferably 0.25 to 1.2 wt %, based on the total weight of the lubricating oil composition.
- a dispersant may also be employed in the lubricating oil composition of the present invention.
- the dispersant may be ashless dispersants such as an alkenyl succinimide, an alkenyl succinic anhydride, an alkenyl succinate ester, and the like, or mixtures of such dispersants.
- Ashless dispersants are broadly divided into several groups.
- One such group is directed to copolymers which contain a carboxylate ester with one or more additional polar function, including amine, amide, imine, imide, hydroxyl carboxyl, and the like. These products can be prepared by copolymerization of long chain alkyl acrylates or methacrylates with monomers of the above function.
- Such groups include alkyl methacrylate-vinyl pyrrolidinone copolymers, alkyl methacrylate-dialkylaminoethyl methacrylate copolymers and the like.
- amides and polyamides or esters and polyesters such as tetraethylene pentamine, polyvinyl polysterarates and other polystearamides may be employed.
- Preferred dispersants are N-substituted long chain alkenyl succinimides.
- Mono and bis alkenyl succinimides are usually derived from the reaction of alkenyl succinic acid or anhydride and alkylene polyamines. These compounds are generally considered to have the formula wherein R 2 is a substantially hydrocarbon radical having a molecular weight from about 450 to 3000, that is, R 2 is a hydrocarbyl radical, preferably an alkenyl radical, containing from about 30 to about 200 carbon atoms; Alk is an alkylene radical of from about 2 to 10, preferably from about 2 to 6, carbon atoms, R 3 , R 4 , and R 5 are selected from a C 1 -C 4 alkyl or alkoxy or hydrogen, preferably hydrogen, and x is an integer from about 0 to 10, preferably from about 0 to 3.
- the actual reaction product of alkylene or alkenylene succinic acid or anhydride and alkylene polyamine will comprise the mixture of compounds including succinamic acids and succinimides. However, it is customary to designate this reaction product as a succinimide of the described formula, since this will be a principal component of the mixture.
- the mono alkenyl succinimide and bis alkenyl succinimide produced may depend on the charge mole ratio of polyamine to succinic groups and the particular polyamine used. Charge mole ratios of polyamine to succinic groups of about 1:1 may produce predominately mono alkenyl succinimide. Charge mole ratios of polyamine to succinic group of about 1:2 may produce predominately bis alkenyl succinimide.
- N-substituted alkenyl succinimides can be prepared by reacting maleic anhydride with an olefinic hydrocarbon followed by reacting the resulting alkenyl succinic anhydride with the alkylene polyamine.
- the R 2 radical of the above formula that is, the alkenyl radical, is preferably derived from a polymer prepared from an olefin monomer containing from about 2 to 5 carbon atoms.
- the alkenyl radical is obtained by polymerizing an olefin containing from about 2 to 5 carbon atoms to form a hydrocarbon having a molecular weight ranging from about 450 to 3000.
- Such olefin monomers are exemplified by ethylene, propylene, 1-butene, 2-butene, isobutene, and mixtures thereof.
- the alkenyl succinimide may be prepared by reacting a polyalkylene succinic anhydride with an alkylene polyamine.
- the polyalkylene succinic anhydride is the reaction product of a polyalkylene (preferably polyisobutene) with maleic anhydride.
- a polyalkylene preferably polyisobutene
- maleic anhydride preferably polyisobutene
- One can use thermal, chlorination, free radical, acid catalyzed, or any other process in this preparation.
- suitable polyalkylene succinic anhydrides are thermal PIBSA (polyisobutenyl succinic anhydride) described in U.S. Pat.
- the polyalkylene succinic anhydride is preferably a polyisobutenyl succinic anhydride.
- the polyalkylene succinic anhydride is a polyisobutenyl succinic anhydride having a number average molecular weight of at least 450, more preferably at least from about 900 to 3000 and still more preferably from at least from about 900 to 2300.
- a mixture of polyalkylene succinic anhydrides is employed.
- the mixture preferably comprises a low molecular weight polyalkylene succinic anhydride component and a high molecular weight polyalkylene succinic anhydride component.
- the low molecular weight component has a number average molecular weight of from about 450 to below 1000 and the high molecular weight component has a number average molecular weight of from about 1000 to about 3000.
- both the low and high molecular weight components are polyisobutenyl succinic anhydrides.
- various molecular weights polyalkylene succinic anhydride components can be combined as a dispersant as well as a mixture of the other above referenced dispersants as identified above.
- the polyalkylene succinic anhydride can also be incorporated with the detergent which is anticipated to improve stability and compatibility of the detergent mixture.
- the detergent When employed with the detergent it can comprise from about 0.5 to 5.0 percent by weight of the detergent mixture and preferably from about 1.5 to 4.0 wt %.
- the preferred polyalkylene amines used to prepare the succinimides are of the formula: wherein z is an integer of from about 0 to 10 and Alk, R 3 , R 4 , and R 5 are as defined above.
- the alkylene amines include principally methylene amines, ethylene amines, butylene amines, propylene amines, pentylene amines, hexylene amines, heptylene amines, octylene amines, other polymethylene amines and also the cyclic and the higher homologs of such amines as piperazine and amino alkylsubstituted piperazines.
- ethylene diamine triethylene tetraamine, propylene diamine, decamethyl diamine, octamethylene diamine, diheptamethylene triamine, tripropylene tetraamine, tetraethylene pentamine, trimethylene diamine, pentaethylene hexamine, ditrimethylene triamine, 2-heptyl-3-(2-aminopropyl)-imidazoline,4-methyl imidazoline, N,N-dimethyl-1,3-propane diamine, 1,3-bis(2-aminoethyl)imidazoline, 1-(2-aminopropyl)-piperazine, 1,4-bis(2-aminoethyl)piperazine and 2-methyl-1-(2-aminobutyl)piperazine. Higher homologs such as are obtained by condensing two or more of the above-illustrated alkylene amines likewise are useful.
- ethylene amines are especially useful. They are described in some detail under the heading "Ethylene Amines” in Encyclopedia of Chemical Technology, Kirk-Othmer, Vol. 5, pp. 898-905 (Interscience Publishers, New York, 1950 ).
- ethylene amine is used in a generic sense to denote a class of polyamines conforming for the most part to the structure H 2 N(CH 2 CH 2 NH) a H wherein a is an integer from 1 to 10.
- ethylene diamine diethylene triamine
- triethylene tetraamine tetraethylene pentamine
- pentaethylene hexamine pentaethylene hexamine
- the individual alkenyl succinimides used in the alkenyl succinimide composition of the present invention can be prepared by conventional processes, such as disclosed in U.S. Pat. Nos. 2,992,708 ; 3,018,250 ; 3,018,291 ; 3,024,237 ; 3,100,673 ; 3,172,892 ; 3,202,678 ; 3,219,666 ; 3,272,746 ; 3,361,673 ; 3,381,022 ; 3,912,764 ; 4,234,435 ; 4,612,132 ; 4,747,965 ; 5,112,507 ; 5,241,003 ; 5,266,186 ; 5,286,799 ; 5,319,030 ; 5,334,321 ; 5,356,552 ; 5,716,912 .
- alkenyl succinimides are post-treated succinimides such as post-treatment processes involving borate or ethylene carbonate disclosed by Wollenberg, et al., U.S. Pat. No. 4,612,132 , Wollenberg, et al., U.S. Pat. No. 4,746,446 ; and the like as well as other post-treatment processes.
- the carbonate-treated alkenyl succinimide is a polybutene succinimide derived from polybutenes having a molecular weight of from about 450 to 3000, preferably from about 900 to 2500, more preferably from about 1300 to 2300, and preferably from about 2000 to 2400, as well as mixtures of these molecular weights.
- it is prepared by reacting, under reactive conditions, a mixture of a polybutene succinic acid derivative, an unsaturated acidic reagent copolymer of an unsaturated acidic reagent and an olefin, and a polyamine, such as taught in U.S. Pat. No. 5,716,912 .
- the dispersant when employed in the lubricating oil composition of the present invention comprises from about 2.0 to 10 wt %, preferably 3.0 to 5.0 wt %, based on the total weight of the lubricating oil composition.
- the lubricating oil composition of the present invention includes a major amount of base oil of lubricating viscosity.
- Base oil as used herein is defined as a base stock or blend of base stocks which is a lubricant component that is produced by a single manufacturer to the same specifications (independent of feed source or manufacturer's location); that meets the same manufacturer's specification; and that is identified by a unique formula, product identification number, or both.
- Base stocks may be manufactured using a variety of different processes including but not limited to distillation, solvent refining, hydrogen processing, oligomerization, esterification, and rerefining. Rerefined stock shall be substantially free from materials introduced through manufacturing, contamination, or previous use.
- the base oil of this invention may be any natural or synthetic lubricating base oil fraction particularly those having a kinematic viscosity at 100 degrees Centigrade (C) and about 4 centistokes (cSt) to about 20 cSt.
- Hydrocarbon synthetic oils may include, for example, oils prepared from the polymerization of ethylene, i.e., polyalphaolefin or PAO, or from hydrocarbon synthesis procedures using carbon monoxide and hydrogen gases such as in a Fisher-Tropsch process.
- a preferred base oil is one that comprises little, if any, heavy fraction; e.g., little, if any, lube oil fraction of viscosity about 20 cSt or higher at about 100 degrees C.
- Oils used as the base oil will be selected or blended depending on the desired end use and the additives in the finished oil to give the desired grade of engine oil, e.g. a lubricating oil composition having an SAE Viscosity Grade of 0W, 0W-20, 0W-30, 0W-40, 0W-50, 0W-60, 5W, 5W-20, 5W-30, 5W-40, 5W-50, 5W-60, 10W, 10W-20, 10W-30, 10W-40, 10W-50, 15W, 15W-20, 15W-30, or 15W-40.
- SAE Viscosity Grade 0W, 0W-20, 0W-30, 0W-40, 0W-50, 0W-60, 5W, 5W-20, 5W-30, 5W-40, 5W-50, 5W-60, 10W, 10W-20, 10W-30, 10W-40, 10W-50, 15W, 15W-20, 15W-30, or 15W-40.
- the base oil may be derived from natural lubricating oils, synthetic lubricating oils or mixtures thereof.
- Suitable base oil includes base stocks obtained by isomerization of synthetic wax and slack wax, as well as hydrocrackate base stocks produced by hydrocracking (rather than solvent extracting) the aromatic and polar components of the crude.
- Suitable base oils include those in all API categories I, II, III, IV and V as defined in API Publication 1509, 14th Edition, Addendum I, December 1998 . Saturates levels and viscosity indices for Group I, II and III base oils are listed in Table 1.
- Group IV base oils are polyalphaolefins (PAO).
- Group V base oils include all other base oils not included in Group I, II, III, or IV.
- Group II, III and IV base oils are also useful in the present invention.
- Group II and III base oils may be prepared by combining one or more of Group I, II, and III base stocks or base oils.
- TABLE 1 SATURATES, SULFUR AND VISCOSITY INDEX OF GROUP I, II AND III BASE STOCKS Group Saturates (As determined by ASTM D 2007) Viscosity Index (As determined by ASTM D 4294, ASTM D 4297 or ASTM D 3120) Sulfur (As determined by ASTM D 2270) I Less than 90 % saturates and/or Greater than to 0.03 % sulfur Greater than or equal to 80 and less than 120 II Greater than or equal to 90 % saturates and less than or equal to 0.03 % sulfur Greater than or equal to 80 and less than 120 III Greater than or equal to 90 % saturates and less than or equal to 0.03% sulfur Greater than or equal to 120 IV All Polyalphaolefins (PAOs) V All others not included
- Natural lubricating oils may include animal oils, vegetable oils (e.g., rapeseed oils, castor oils and lard oil), petroleum oils, mineral oils, and oils derived from coal or shale.
- vegetable oils e.g., rapeseed oils, castor oils and lard oil
- petroleum oils e.g., mineral oils, and oils derived from coal or shale.
- Synthetic oils may include hydrocarbon oils and halo-substituted hydrocarbon oils such as polymerized and inter-polymerized olefins, alkylbenzenes, polyphenyls, alkylated diphenyl ethers, alkylated diphenyl sulfides, as well as their derivatives, analogues and homologues thereof, and the like.
- Synthetic lubricating oils also include alkylene oxide polymers, interpolymers, copolymers and derivatives thereof wherein the terminal hydroxyl groups have been modified by esterification, etherification, etc.
- Another suitable class of synthetic lubricating oils comprises the esters of dicarboxylic acids with a variety of alcohols.
- Esters useful as synthetic oils also include those made from C 5 to C 12 monocarboxylic acids and polyols and polyol ethers.
- Tri-alkyl phosphate ester oils such as those exemplified by tri-n-butyl phosphate and tri-iso-butyl phosphate are also suitable for use as base oils.
- Silicon-based oils (such as the polyalkyl-, polyaryl-, polyalkoxy-, or polyaryloxy-siloxane oils and silicate oils) comprise another useful class of synthetic lubricating oils.
- Other synthetic lubricating oils include liquid esters of phosphorus-containing acids, polymeric tetrahydrofurans, polyalphaolefins, and the like.
- the base oil may be derived from unrefined, refined, rerefined oils, or mixtures thereof.
- Unrefined oils are obtained directly from a natural source or synthetic source (e.g., coal, shale, or tar sand bitumen) without further purification or treatment.
- Examples of unrefined oils include a shale oil obtained directly from a retorting operation, a petroleum oil obtained directly from distillation, or an ester oil obtained directly from an esterification process, each of which may then be used without further treatment.
- Refined oils are similar to the unrefined oils except that refined oils have been treated in one or more purification steps to improve one or more properties.
- Suitable purification techniques include distillation, hydrocracking, hydrotreating, dewaxing, solvent extraction, acid or base extraction, filtration, and percolation, all of which are known to those skilled in the art.
- Rerefined oils are obtained by treating used oils in processes similar to those used to obtain the refined oils. These rerefined oils are also known as reclaimed or reprocessed oils and often are additionally processed by techniques for removal of spent additives and oil breakdown products.
- Base oil derived from the hydroisomerization of wax may also be used, either alone or in combination with the aforesaid natural and/or synthetic base oil.
- Such wax isomerate oil is produced by the hydroisomerization of natural or synthetic waxes or mixtures thereof over a hydroisomerization catalyst.
- a major amount of base oil of lubricating viscosity as defined herein comprises 40 wt % or more, preferably about 40 wt % to about 97 wt %, more preferably about 50 wt % to about 97 wt %, still more preferably about 60 wt % to about 97 wt % and most preferably about 80 wt % to about 95 wt % of the lubricating oil composition.
- additive components are examples of some of the components that can be favorably employed in the present invention. These examples of additives are provided to illustrate the present invention, but they are not intended to limit it:
- the low phosphorus lubricating oil compositions of the present invention were prepared by blending together the following components to obtain a SAE 5W-20 viscosity grade formulation (Table 2).
- Table 2 Lubricating Oil Compositions Component a Oil A (Reference) Oil B (Comparative) Oil C (Invention) Ca Sulfonate, milliMoles 50.0 50.0 50.0 Oxymolybdenum complex 0.5 0.5 0.5 0.5 Friction Modifier 0 0.5 (Nitrogen-Containing) 0.5 (Ester-Containing) Diphenylamine-type Antioxidant 0.4 0.4 0.4 a The quantity of the components in the lubricating oil are expressed as wt % unless noted otherwise.
- Components are: Ca Sulfonate is high overbased (HOB) TBN 426 calcium alkyl aryl sulfonate derived from benzene and C 20 -C 24 normal alpha olefin.
- Oxymolybdenum complex is a sulfurized molybdenum succinimide complex, expressed as active ingredient.
- Friction Modifier is: Nitrogen-Containing: reaction product of coconut oil and diethanol amine (available from Chevron Oronite Company, LLC). Ester-Containing: borated glycerol monooleate as disclosed in U.S. Pat. No. 5,629,272 .
- Diphenylamine-type Antioxidant is alkylated diphenylamine.
- the balance of the lubricating oil composition contains a Group II base oil and minor other components such as foam inhibitors, viscosity index improvers, pour point depressants, dispersants, sulfur-containing antioxidants, mixture of primary and secondary zinc dialkyldithiophosphates providing less than 0.08 wt % phosphorus content, based on the total weight of oil lubricating oil composition.
- the fuel economy performance was determined by engine testing using a shortened version of the Sequence VIB test entitled herein as the Sequence VIB screener.
- the Sequence VIB (ASTM D6837) is an engine dynamometer test that measures a lubricant's ability to improve the fuel economy of passenger cars and light-duty trucks equipped with a low friction engine. The method compares the performance of a test lubricant to the performance of a baseline lubricant over five different stages of operation.
- the standard Sequence VIB test incorporates a flush and run type procedure with each test consisting of two 5-stage fuel economy measurements on a baseline oil (BC), one at the beginning of the test (Phase I) and one at the end (Phase II). The test oil is evaluated in between the two baseline runs.
- phase one fuel economy for the candidate test oil is calculated. Following 80 hours at an engine speed of 2250 r/min and 135°C oil temperature. The test oil once again goes through a 5-stage fuel economy measurement. A phase one and phase two fuels economy improvement of the candidate oil compared to the baseline oil fuel economy is calculated. In the shortened Sequence VIB screener only Phase I fuel economy is determined without severity adjustment. The calculated fuel economy improvement equates the fuel economy results obtained from vehicles representative of current production vehicles running under the current EPA (Environmental Protection Agency) testing cycles.
- Passing criteria relates to the minimum % fuel economy improvement versus the ASTM baseline (reference oil BC) for SAE 0W-20 and 5W-20 viscosity grades is at least 2.4% minimum after Phase I (16 hours aging), 2.0% minimum for SAE 0W-30 and 5W30 viscosity grades and at least 1.3 % for all other SAE multiviscosity grades.
- the results of the V!B screener tests are presented in Table 3. Higher % FEI values indicate improved fuel economy. Table 3. VIB Screener Test Results Oil % Fuel Economy Improvement (FEI) A (Reference) 1.73 B (Comparative) 2.32 C (Invention) 2.55
- Oil C lubricating oil composition of the present invention
- Oil B lubricating oil composition of the present invention
- the following results in Table 4 provide evidence of the further benefits of the lubricating oil composition of the present invention.
- the low phosphorus lubricating oil compositions were prepared by blending together the components in Table 4 to obtain a SAE 5W-30 viscosity grade formulation.
- the TEOST MHT4 Thermo-oxidation Engine Oil Simulation Test Moderately High Temperature, trademark of the Tannas Company
- the TEOST MHT4 is for measuring engine deposits at moderately high temperatures on a special test rod exposed to automotive engine oils. In this test, a sample of the test engine oil containing a small amount of an organo-metallic catalyst is continuously cycled to flow down the outside of a pre-weighed, special wire-wound depositor rod positioned in a glass-mantle casing by two metal end caps.
- the rod is resistively heated to obtain a constant temperature at the "hot spot" of 285°C for 24 hours. During this time, dry air is forces to flow through the mantle chamber at a specific rate of 10 mL/min.
- the depositor rod is carefully rinsed of oil residue using a volatile hydrocarbon solvent and any deposits flaking off the rod while being washed are caught and filtered. After drying the rod and filter, the mass of deposits on the rod and in the filter are determined. The mass of deposits on the rod plus the mass of deposits on the filter is the total rod deposit mass.
- the pass limit is 35 mg or less based on the ILSAC GF-4 specification. Table 4.
- Oxymolybdenum complex is a sulfurized molybdenum succinimide complex, expressed as active ingredient.
- Friction Modifier is borated glycerol monooleate as disclosed in U.S. Pat. No. 5,629,272 .
- Diphenylamine-type Antioxidant is alkylated diphenylamine.
- the balance of the lubricating oil composition contains a Group II base oil and minor other components such as foam inhibitors, viscosity index improvers, pour point depressants, dispersants, low overbased detergent, mixture of primary and secondary zinc dialkyldithiophosphates providing less than 0.08 wt % phosphorus content, based on the total weight of oil lubricating oil composition.
- HOB Phenate Sequence VIB Screener Test Component a Oil H Oil I HOB Detergent @ 55 milliMoles Ca Sulfonate Ca Phenate Oxymolybdenum complex 0.5 0.5 Friction Modifier 0.5 0.5 Diphenylamine-type Antioxidant 0.4 0.4 VIB Screener Fuel economy, % FEI 2.45 2.08 a The quantity of the components in the lubricating oil are expressed as wt % unless noted otherwise. Components are: Ca Sulfonate is high overbased (HOB) TBN 426 calcium alkyl aryl sulfonate derived from benzene and C 20 -C 24 normal alpha olefin.
- Ca Phenate is 250 TBN calcium alkyl phenate as described in U.S. Pat. No. 3,178,368 .
- Oxymolybdenum complex is a sulfurized molybdenum succinimide complex, expressed as active ingredient.
- Friction Modifier is borated glycerol monooleate as disclosed in U.S. Pat. No. 5,629,272 .
- Diphenylamine-type Antioxidant is alkylated diphenylamine.
- the balance of the lubricating oil composition contains a Group II base oil and minor other components such as foam inhibitors, viscosity index improvers, pour point depressants, dispersants, sulfur-containing antioxidants, mixture of primary and secondary zinc dialkyldithiophosphates providing less than 0.08 wt % phosphorus content, based on the total weight of oil lubricating oil composition.
- the total concentration of the oxymolybdenum-containing complex and antioxidant must be at least 1.3 wt %, based on the total weight of the lubricating oil composition.
- Table 6 shows results demonstrating that a concentration of oxymolybdenum-containing complex and antioxidant of at least 1.3 wt % does not pass the ASTM Sequence IIIG/Mini Rotary Viscometer (MRV) used oil (ASTM D4684) test.
- MMV Sequence IIIG/Mini Rotary Viscometer
- the low phosphorus lubricating oil compositions were prepared by blending together the components in Table 6 to obtain a SAE 5W-30 viscosity grade formulation.
- the lubricating oil composition is first run through an ASTM Sequence IIIG Test which is a test measuring oil thickening and piston deposits under high temperature conditions and provides information about valve train wear.
- ASTM Sequence IIIG test is conducted with 1996/1997 231 C.I.C. (3800CC) Series II General Motors V-6 fuel-injected engine. Using unleaded gasoline, the engine runs a 10-minute initial oil leveling procedure followed by a 150-minute slow ramp up to speed and load conditions. It then operates at 125 bhp, 3600 rpm, and 150°C oil temperature for 100 hours, interrupted at 20-hour intervals for oil level checks. After which the used oil is evaluated in the MRV test.
- MRV Test Results Component a Oil J Oil K Ca Sulfonate, milliMoles 40.0 40.0 Oxymolybdenum complex 0.2 0.3 Friction Modifier 0.3 0.3 Diphenylamine-type Antioxidant 1.0 1.25 MRV, cP 60000 max 185500 42100 a The quantity of the components in the lubricating oil are expressed as wt % unless noted otherwise.
- Ca Sulfonate is high overbased (HOB) TBN 426 calcium alkyl aryl sulfonate derived from benzene and C 20 -C 24 normal alpha olefin.
- Oxymolybdenum complex is a sulfurized molybdenum succinimide complex, expressed as active ingredient.
- Friction Modifier is borated glycerol monooleate as disclosed in U.S. Pat. No. 5,629,272 .
- Diphenylamine-type Antioxidant is alkylated diphenylamine.
- the balance of the lubricating oil composition contains a Group II base oil and minor other components such as foam inhibitors, viscosity index improvers, pour point depressants, phenates, mixture of primary and secondary zinc dialkyldithiophosphates providing less than 0.08 wt % phosphorus content, based on the total weight of oil lubricating oil composition.
- the lubricating oil composition (Oil J) fails the MRV test when the total concentration of the oxymolybdenum-containing complex and the antioxidant is below 1.3 wt %, based on the total weight of the lubricating oil composition.
- the Thin-Film Oxygen Uptake (TFOUT) test evaluates the oxidation stability of engine oils for gasoline automotive engines. This test, run at 160°C, utilizes a high pressure reactor pressurized with oxygen along with a metal catalyst package, a fuel catalyst, and water in a partial simulation of the conditions to which an oil may be subjected in a gasoline combustion engine.
- the oxidation stability of the lubricating oil composition of the present invention further containing a sulfur-containing compound is shown in Table 7. The results are compared to the lubricating oil composition of the present invention without the inclusion of a sulfur-containing compound (baseline). The longer the time in minutes the better the lubricating oil composition is at withstanding oxidation. Table 7.
- Oxymolybdenum complex sulfurized molybdenum succinimide complex, expressed as active ingredient.
- Friction Modifier borated glycerol monooleate as disclosed in U.S. Pat. No. 5,629,272 .
- Diphenylamine-type Antioxidant alkylated diphenylamine.
- the balance of the lubricating oil composition contains a Group II base oil and minor other components such as foam inhibitors, viscosity index improvers, pour point depressants, dispersants, low overbased detergent, mixture of primary and secondary zinc dialkyldithiophosphates providing less than 0.08 wt % phosphorus content, based on the total weight of oil lubricating oil composition.
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Claims (29)
- Schmierölzusammensetzung, umfassend:a) eine größere Menge eines Basisöls mit Schmierviskosität;b) 0,1 bis 10 Gew.-% eines überbasischen Erdalkalimetallalkylarylsulfonat-Detergens mit einer Gesamtbasenzahl (TBN) von 250 bis 500, bestimmt nach ASTM-Standard Nr. D2896;c) von 0,02 bis 10 Gew.-% eines oxymolybdänhaltigen Komplexes;d) von 0,1 bis 5,0 Gew.-% eines Esterreibungsmodifikators; unde) von 0,2 bis 10,0 Gew.-% eines Antioxidans, ausgewählt aus der Gruppe Diphenylamin-Typ, schwefelhaltige Verbindung und deren Gemische;wobei die Gesamtkonzentration des oxymolybdänhaltigen Komplexes und des Antioxidationsmittels mindestens 1,3 Gew.-%, bezogen auf das Gesamtgewicht der Schmierölzusammensetzung, betragen muss; und
worin der Phosphorgehalt der gesamten Schmierölzusammensetzung 0,08 Gew.-% oder weniger ist, bezogen auf das Gesamtgewicht der Schmierölzusammensetzung; und
wobei der Esterreibungsmodifikator ein Borsäurederivat eines Esters einer Carbonsäure und eines polyhydrischen Alkohols ist, worin die Carbonsäure von einer bis vier Carbonsäuregruppen und von 8 bis 50 Kohlenstoffatome aufweist und der poylhydrische Alkohol von 2 bis 50 Kohlenstoffatome und von 2 bis 6 Hydroxygruppen hat. - Schmierölzusammensetzung gemäß Anspruch 1, worin die Gesamtkonzentration des oxymolybdänhaltigen Komplexes und des Antioxidationsmittels mindestens 1,45 Gew.-%, bezogen auf die Gesamtkonzentration der Schmierölzusammensetzung, betragen muss.
- Schmierölzusammensetzung gemäß Anspruch 1, worin der Phosphorgehalt 0,06 Gew.-% oder weniger ist, bezogen auf das Gesamtgewicht der Schmierölzusammensetzung.
- Schmierölzusammensetzung gemäß Anspruch 1, worin der Phosphorgehalt 0,05 Gew.-% oder weniger ist, bezogen auf das Gesamtgewicht der Schmierölzusammensetzung.
- Schmierölzusammensetzung gemäß Anspruch 1, worin das Erdalkalimetall Calcium ist.
- Schmierölzusammensetzung gemäß Anspruch 1, wobei das Sulfonat-Detergens von einem linearen normalen C14-40-alpha-Olefin abgeleitet ist, worin mindestens 13 Molprozent der Alkylgruppe an der Position 1 oder 2 der Alkylgruppe mit der Arylgruppe verbunden sind.
- Schmierölzusammensetzung gemäß Anspruch 1, worin die TBN von 300 bis 450 ist, bestimmt nach ASTM-Standard Nr. D2896.
- Schmierölzusammensetzung gemäß Anspruch 1, ferner umfassend eine öllösliche, phosphorhaltige Antiverschleißverbindung.
- Schmierölzusammensetzung gemäß Anspruch 8, worin die öllösliche, phosphorhaltige Antiverschleißverbindung ausgewählt ist aus der Gruppe Metalldithiophosphate, Phosphorester, Aminphosphate und Aminphosphinate, schwefelhaltige Phosphorester, Phosphoramide und Phosphonamide.
- Schmierölzusammensetzung gemäß Anspruch 9, worin die Phosphorester ausgewählt sind aus der Gruppe Phosphate, Phosphonate, Phosphinate, Phosphinoxide, Phosphite, Phosphonite, Phosphinite und Phosphine.
- Schmierölzusammensetzung gemäß Anspruch 9, worin die schwefelhaltigen Phosphorester ausgewählt sind aus der Gruppe Phosphormonothiat und Phosphordithionate.
- Schmierölzusammensetzung gemäß Anspruch 9, worin die öllösliche, phosphorhaltige Antiverschleißverbindung ein Metalldithiophosphat ist.
- Schmierölzusammensetzung gemäß Anspruch 12, worin das Metalldithiophosphat Zinkdialkyldithiophosphat ist.
- Schmierölzusammensetzung nach Anspruch 1, worin die im oxymolybdänhaltigen Komplex verwendete stickstoffhaltige Verbindung ausgewählt ist aus der Gruppe Bersteinsäureimide, Carbonsäureamide, Hydrocarbylmonoamine, Kohlenwasserstoffpolyamine, Mannichbasen, Phosphoramide, Thiophosphoramide, Phosphonamide, Dispergiermittel-Viskositätszahlverbesserer und deren Gemische.
- Schmierölzusammensetzung gemäß Anspruch 14, worin die stickstoffhaltige Verbindung ein Bersteinsäureimid ist und der oxymolybdänhaltige Komplex ein Molybdänbernsteinsäureimid ist.
- Schmierölzusammensetzung gemäß Anspruch 15, worin das Molybdänbernsteinsäureimid ein sulfuriertes Molybdänbernsteinsäureimid ist.
- Schmierölzusammensetzung gemäß Anspruch 15, worin das Molybdänbernsteinsäureimid ein ungeschwefeltes Molybdänbernsteinsäureimid ist.
- Schmierölzusammensetzung gemäß Anspruch 1, worin der Esterreibungsmodifikator ein borierter Glycerinmonooleatester ist.
- Schmierölzusammensetzung gemäß Anspruch 1, worin das Antioxidationsmittel ein Antioxidationsmittel vom Diphenylamin-Typ ist.
- Schmierölzusammensetzung gemäß Anspruch 19, worin das Antioxidationsmittel vom Diphenylamin-Typ ausgewählt ist aus der Gruppe alkyliertes Diphenylamin, Phenyl-α-naphthylamin und alkyliertes α-Naphthylamin.
- Schmierölzusammensetzung gemäß Anspruch 20, worin das Antioxidationsmittel vom Diphenylamin-Typ alkyliertes Diphenylamin ist.
- Schmierölzusammensetzung gemäß Anspruch 1, worin das Antioxidationsmittel eine schwefelhaltige Verbindung ist.
- Schmierölzusammensetzung gemäß Anspruch 22, worin die schwefelhaltige Verbindung ausgewählt ist aus der Gruppe geschwefelte Esterverbindung, geschwefeltes Olefin und Dithiocarbamat.
- Schmierölzusammensetzung gemäß Anspruch 23, worin die schwefelhaltige Verbindung ein Dithiocarbamat ist
- Schmierölzusammensetzung gemäß Anspruch 1, ferner umfassend ein Alkenylbernsteinsäureimid-Dispergiermittel, abgeleitet von einem Polyalkylen mit mittlerem Molekulargewicht von 450 bis 3000.
- Schmierölzusammensetzung gemäß Anspruch 25, worin das Polyalkylen Polyisobutenyl mit einem zahlengemittelten Molekulargewicht von 900 bis 2300 ist.
- Schmierölzusammensetzung gemäß Anspruch 26, worin das Polyisobutenylbernsteinsäureimid mit Ethylencarbonat nachbehandelt ist.
- Verfahren zum Verbessern des Kraftstoffverbrauchs eines Benzin-Verbrennungsmotors, umfassend Betreiben des Motors mit einer Schmierölzusammensetzung, wie in irgendeinem der vorhergehenden Ansprüche beansprucht.
- Verwendung einer Schmierölzusammensetzung, wie in irgendeinem der Ansprüche 1 bis 27 beansprucht, in einem Benzin-Verbrennungsmotor zum Zweck der Verbesserung seines Kraftstoffverbrauchs.
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JP2011525563A (ja) * | 2008-06-24 | 2011-09-22 | シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ | ポリ(ヒドロキシカルボン酸)アミドを含む潤滑組成物の使用法 |
EP2318485A1 (de) | 2008-07-31 | 2011-05-11 | Shell Oil Company | Poly(hydroxycarbonsäure)-amidsalzderivat und schmiermittelzusammensetzung damit |
US20100081591A1 (en) * | 2008-09-30 | 2010-04-01 | Chevron Oronite Company Llc | Lubricating oil compositions |
CA2818589C (en) * | 2010-11-24 | 2018-04-24 | Chevron Oronite Company Llc | Lubricating composition containing friction modifier blend |
US9885004B2 (en) | 2013-12-23 | 2018-02-06 | Exxonmobil Research And Engineering Company | Method for improving engine fuel efficiency |
US10190072B2 (en) | 2013-12-23 | 2019-01-29 | Exxonmobil Research And Engineering Company | Method for improving engine fuel efficiency |
US9506008B2 (en) | 2013-12-23 | 2016-11-29 | Exxonmobil Research And Engineering Company | Method for improving engine fuel efficiency |
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