CA2131098C - Lubricant composition containing mixed friction modifiers - Google Patents
Lubricant composition containing mixed friction modifiersInfo
- Publication number
- CA2131098C CA2131098C CA002131098A CA2131098A CA2131098C CA 2131098 C CA2131098 C CA 2131098C CA 002131098 A CA002131098 A CA 002131098A CA 2131098 A CA2131098 A CA 2131098A CA 2131098 C CA2131098 C CA 2131098C
- Authority
- CA
- Canada
- Prior art keywords
- composition
- carbon atoms
- oil
- amine
- weight
- 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.)
- Expired - Fee Related
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 78
- 239000003607 modifier Substances 0.000 title abstract description 20
- 239000000314 lubricant Substances 0.000 title abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 55
- 150000002148 esters Chemical class 0.000 claims abstract description 27
- 239000000654 additive Substances 0.000 claims abstract description 22
- 239000010687 lubricating oil Substances 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 12
- 230000001050 lubricating effect Effects 0.000 claims abstract description 5
- 150000001412 amines Chemical class 0.000 claims description 31
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 claims description 24
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 24
- 125000004432 carbon atom Chemical group C* 0.000 claims description 23
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 16
- 239000000194 fatty acid Substances 0.000 claims description 16
- 229930195729 fatty acid Natural products 0.000 claims description 16
- 239000003760 tallow Substances 0.000 claims description 13
- 239000003112 inhibitor Substances 0.000 claims description 12
- RZRNAYUHWVFMIP-KTKRTIGZSA-N 1-oleoylglycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-KTKRTIGZSA-N 0.000 claims description 11
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 11
- 239000007795 chemical reaction product Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000003599 detergent Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 150000004665 fatty acids Chemical class 0.000 claims description 9
- 125000002947 alkylene group Chemical group 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical class ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 229940014800 succinic anhydride Drugs 0.000 claims description 6
- 239000004034 viscosity adjusting agent Substances 0.000 claims description 6
- AFSHUZFNMVJNKX-UHFFFAOYSA-N 1,2-di-(9Z-octadecenoyl)glycerol Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC(CO)OC(=O)CCCCCCCC=CCCCCCCCC AFSHUZFNMVJNKX-UHFFFAOYSA-N 0.000 claims description 5
- AFSHUZFNMVJNKX-LLWMBOQKSA-N 1,2-dioleoyl-sn-glycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@H](CO)OC(=O)CCCCCCC\C=C/CCCCCCCC AFSHUZFNMVJNKX-LLWMBOQKSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- RZRNAYUHWVFMIP-HXUWFJFHSA-N glycerol monolinoleate Natural products CCCCCCCCC=CCCCCCCCC(=O)OC[C@H](O)CO RZRNAYUHWVFMIP-HXUWFJFHSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 229920000768 polyamine Polymers 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- 229910052717 sulfur Chemical group 0.000 claims description 3
- 239000011593 sulfur Chemical group 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- GOHYJHLGLUVFQB-UHFFFAOYSA-N 1-nonyl-7-thiabicyclo[4.1.0]hepta-2,4-dien-6-ol Chemical compound C1=CC=CC2(CCCCCCCCC)C1(O)S2 GOHYJHLGLUVFQB-UHFFFAOYSA-N 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims description 2
- -1 hydrocarbyl amine Chemical class 0.000 abstract description 39
- 239000000446 fuel Substances 0.000 abstract description 13
- 229920005862 polyol Polymers 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 150000003077 polyols Chemical class 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 150000004671 saturated fatty acids Chemical class 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 abstract description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 abstract description 2
- 239000000306 component Substances 0.000 abstract 3
- 125000003545 alkoxy group Chemical group 0.000 abstract 1
- 235000019198 oils Nutrition 0.000 description 49
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 238000009472 formulation Methods 0.000 description 16
- 239000002253 acid Substances 0.000 description 15
- 239000010949 copper Substances 0.000 description 11
- 229910052802 copper Inorganic materials 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 10
- 125000000217 alkyl group Chemical group 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 229930195733 hydrocarbon Natural products 0.000 description 8
- 150000002430 hydrocarbons Chemical class 0.000 description 8
- 150000002989 phenols Chemical class 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 150000007513 acids Chemical class 0.000 description 7
- 150000003839 salts Chemical class 0.000 description 7
- 229910052720 vanadium Inorganic materials 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 4
- NAGJZTKCGNOGPW-UHFFFAOYSA-N dithiophosphoric acid Chemical group OP(O)(S)=S NAGJZTKCGNOGPW-UHFFFAOYSA-N 0.000 description 4
- 230000032050 esterification Effects 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 229920000098 polyolefin Polymers 0.000 description 4
- 239000010689 synthetic lubricating oil Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 239000005749 Copper compound Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 239000002199 base oil Substances 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 150000001879 copper Chemical class 0.000 description 3
- 150000001880 copper compounds Chemical class 0.000 description 3
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 3
- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 3
- 235000011044 succinic acid Nutrition 0.000 description 3
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- CIRMGZKUSBCWRL-LHLOQNFPSA-N (e)-10-[2-(7-carboxyheptyl)-5,6-dihexylcyclohex-3-en-1-yl]dec-9-enoic acid Chemical compound CCCCCCC1C=CC(CCCCCCCC(O)=O)C(\C=C\CCCCCCCC(O)=O)C1CCCCCC CIRMGZKUSBCWRL-LHLOQNFPSA-N 0.000 description 2
- UWNADWZGEHDQAB-UHFFFAOYSA-N 2,5-dimethylhexane Chemical group CC(C)CCC(C)C UWNADWZGEHDQAB-UHFFFAOYSA-N 0.000 description 2
- HBHLHEJVEMYNOX-UHFFFAOYSA-N 2-[2-dodecoxyethyl(2-hydroxyethyl)amino]ethanol Chemical compound CCCCCCCCCCCCOCCN(CCO)CCO HBHLHEJVEMYNOX-UHFFFAOYSA-N 0.000 description 2
- QOXOZONBQWIKDA-UHFFFAOYSA-N 3-hydroxypropyl Chemical group [CH2]CCO QOXOZONBQWIKDA-UHFFFAOYSA-N 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920002367 Polyisobutene Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 description 2
- 150000005690 diesters Chemical class 0.000 description 2
- VJHINFRRDQUWOJ-UHFFFAOYSA-N dioctyl sebacate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCC(=O)OCC(CC)CCCC VJHINFRRDQUWOJ-UHFFFAOYSA-N 0.000 description 2
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- QNVRIHYSUZMSGM-UHFFFAOYSA-N hexan-2-ol Chemical compound CCCCC(C)O QNVRIHYSUZMSGM-UHFFFAOYSA-N 0.000 description 2
- ZOCHHNOQQHDWHG-UHFFFAOYSA-N hexan-3-ol Chemical compound CCCC(O)CC ZOCHHNOQQHDWHG-UHFFFAOYSA-N 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000005673 monoalkenes Chemical class 0.000 description 2
- 150000002763 monocarboxylic acids Chemical class 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- JYVLIDXNZAXMDK-UHFFFAOYSA-N pentan-2-ol Chemical compound CCCC(C)O JYVLIDXNZAXMDK-UHFFFAOYSA-N 0.000 description 2
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 229920001748 polybutylene Polymers 0.000 description 2
- 229920000193 polymethacrylate Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 125000001273 sulfonato group Chemical class [O-]S(*)(=O)=O 0.000 description 2
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 1
- GGQQNYXPYWCUHG-RMTFUQJTSA-N (3e,6e)-deca-3,6-diene Chemical compound CCC\C=C\C\C=C\CC GGQQNYXPYWCUHG-RMTFUQJTSA-N 0.000 description 1
- BWHAMWGGORIDBK-UHFFFAOYSA-N (4-hydrazinylphthalazin-1-yl)hydrazine;sulfuric acid Chemical compound OS(O)(=O)=O.C1=CC=C2C(NN)=NN=C(NN)C2=C1 BWHAMWGGORIDBK-UHFFFAOYSA-N 0.000 description 1
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- ZBUAAIKWLHWSPO-UHFFFAOYSA-N (Z)-20-aminoicos-11-en-1-ol Chemical compound OCCCCCCCCCCC=C/CCCCCCCCN ZBUAAIKWLHWSPO-UHFFFAOYSA-N 0.000 description 1
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 description 1
- RDAGYWUMBWNXIC-UHFFFAOYSA-N 1,2-bis(2-ethylhexyl)benzene Chemical class CCCCC(CC)CC1=CC=CC=C1CC(CC)CCCC RDAGYWUMBWNXIC-UHFFFAOYSA-N 0.000 description 1
- YEYQUBZGSWAPGE-UHFFFAOYSA-N 1,2-di(nonyl)benzene Chemical class CCCCCCCCCC1=CC=CC=C1CCCCCCCCC YEYQUBZGSWAPGE-UHFFFAOYSA-N 0.000 description 1
- 150000005206 1,2-dihydroxybenzenes Chemical class 0.000 description 1
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- 238000005325 percolation Methods 0.000 description 1
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- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
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- 239000010802 sludge Substances 0.000 description 1
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- 125000001424 substituent group Chemical group 0.000 description 1
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- RINCXYDBBGOEEQ-UHFFFAOYSA-N succinic anhydride Chemical class O=C1CCC(=O)O1 RINCXYDBBGOEEQ-UHFFFAOYSA-N 0.000 description 1
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- 150000001911 terphenyls Chemical class 0.000 description 1
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- MQHSFMJHURNQIE-UHFFFAOYSA-N tetrakis(2-ethylhexyl) silicate Chemical compound CCCCC(CC)CO[Si](OCC(CC)CCCC)(OCC(CC)CCCC)OCC(CC)CCCC MQHSFMJHURNQIE-UHFFFAOYSA-N 0.000 description 1
- ZUEKXCXHTXJYAR-UHFFFAOYSA-N tetrapropan-2-yl silicate Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)OC(C)C ZUEKXCXHTXJYAR-UHFFFAOYSA-N 0.000 description 1
- 150000007970 thio esters Chemical class 0.000 description 1
- LGQXXHMEBUOXRP-UHFFFAOYSA-N tributyl borate Chemical compound CCCCOB(OCCCC)OCCCC LGQXXHMEBUOXRP-UHFFFAOYSA-N 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- PQRRMYYPKMKSNF-UHFFFAOYSA-N tris(4-methylpentan-2-yl) tris(4-methylpentan-2-yloxy)silyl silicate Chemical compound CC(C)CC(C)O[Si](OC(C)CC(C)C)(OC(C)CC(C)C)O[Si](OC(C)CC(C)C)(OC(C)CC(C)C)OC(C)CC(C)C PQRRMYYPKMKSNF-UHFFFAOYSA-N 0.000 description 1
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 1
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- 239000008096 xylene Substances 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
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- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
Classifications
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- C10M129/68—Esters
- C10M129/76—Esters containing free hydroxy or carboxyl groups
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- C10M135/10—Sulfonic acids or derivatives thereof
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- C10M2207/288—Partial esters containing free carboxyl groups
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- C10M2207/289—Partial esters containing free hydroxy groups
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- C10M2215/064—Di- and triaryl amines
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- C10M2217/06—Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
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- C10M2219/046—Overbasedsulfonic acid salts
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- C10M2219/088—Neutral salts
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
- C10M2227/06—Organic compounds derived from inorganic acids or metal salts
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- C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
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Abstract
The present invention provides an improved lubricating oil composition for autom otive internal combustion engines and transmission which comprises an oil of lubricating viscosity having admixed ther ewith a minor amount of friction modifier composition which reduces the coefficient of friction between moving mechanical parts, thereby providing for enhanced fuel economy. The friction modifier composition comprises a combination of an alkoxyl ated hydrocarbyl amine and a polyol partial ester of a saturated or unsaturated fatty acid or mixture of such esters, each prefera bly present in the range of from about 0.1 to about 1.0 % by weight based on the weight of the oil. This combination of components p rovides for synergistic fuel economy effects particularly when used as components in automotive crankcase lubricants also con taining conventional additive packages, which effects are not observed in oil which contains one or the other of these compone nts alone.
Description
WO93/21288 ~1 31 0 9 8 PCT/US93/03381 L~CANT co~~ ON~A~NG MIXED FRICTION
- MODI:FIERS
3ACXG~OUND OF ~U~F l~V~NllON
~. Field cf the Invention This invention relates to lubricating oil compositions which exhi~it enhanced fuel economy and which contain a minor amount of the f-ic_~on modifier combination of a poly fatty acid ester and an alkoxylated hydrocar~ylamine.
- MODI:FIERS
3ACXG~OUND OF ~U~F l~V~NllON
~. Field cf the Invention This invention relates to lubricating oil compositions which exhi~it enhanced fuel economy and which contain a minor amount of the f-ic_~on modifier combination of a poly fatty acid ester and an alkoxylated hydrocar~ylamine.
2. Desc_~Dtion of Related Art It is an objective of the automotive and oil industry to provide lubricating oil compositions which exhibit improvements in fuel savings in gasoline and diesel engine vehicles. In order tO
meet these aoals, additives have been developed for cran~case and transmission oi~s which significantly reduce C_ic'ion between engine or ~ransmlssion moving oarts, which reduc_ion _ranslates ~n~o improved mileage per volume of fuel consumed by an internal combustion engine. Because modern day lubricating oil compositions are complex formulations, such additives must be compatible with other components present in the oil and snould not adversely affec~ the numerous other func~ions of conventional lu~ricant additives such as W O 93/21288 PC~r/US93/03381 2131098 ' 2 dispersancy, viscosity stability, corros~on, oxidation inhibition and the like.
Representative examples of known oil additive modifiers are found in U.S. Patent No. 3,933,659 which discloses fatty acid esters and amides; U.S.
Patent No. 4,176,074 which describes molybdenum complexes of polyisobutenyl succinic anhydride-amino alkanols; U.S. Paten~ 4,105,571 which discloses glycerol esters of dimerized fatty acids; U.S. Patent No. 3,779,928 which discloses alkane phosphonic acid salts; U.S. Patent No.
meet these aoals, additives have been developed for cran~case and transmission oi~s which significantly reduce C_ic'ion between engine or ~ransmlssion moving oarts, which reduc_ion _ranslates ~n~o improved mileage per volume of fuel consumed by an internal combustion engine. Because modern day lubricating oil compositions are complex formulations, such additives must be compatible with other components present in the oil and snould not adversely affec~ the numerous other func~ions of conventional lu~ricant additives such as W O 93/21288 PC~r/US93/03381 2131098 ' 2 dispersancy, viscosity stability, corros~on, oxidation inhibition and the like.
Representative examples of known oil additive modifiers are found in U.S. Patent No. 3,933,659 which discloses fatty acid esters and amides; U.S.
Patent No. 4,176,074 which describes molybdenum complexes of polyisobutenyl succinic anhydride-amino alkanols; U.S. Paten~ 4,105,571 which discloses glycerol esters of dimerized fatty acids; U.S. Patent No. 3,779,928 which discloses alkane phosphonic acid salts; U.S. Patent No.
3,778,375 which discloses reaction products of a phosphonate and oleamide: U.S. Patent No. 3,852,215 which discloses S-carboxy-alkylene hydrocar~yl succinimide, S-carboxyalkylene hydrocar~yl succinic acid and mixtures thereof; U.S. Patent 3,879,306 which discloses N-(hydroxy-~lkyl) alkenyl-succinamic acids or succinimides; U.S.
Patent No. 3,932,290 which discloses reaction products of di-(lower alkyl) phosphites and epoxides; and U.S. Patent No. 4,028,258 which discloses the alkylene oxide adduct of phosphosulfurized N-(hydroxyalkyl) alkenyl succinimides.
Another known category of friction modifiers includes alkoxylated hydrocarbyl mono or polyamines such as generally illustrated by formulas 1 and 2 below. These amines include materials such as N,N-bis(2-hydroxyalkyl) hydrocarDyl amines such as disclosed in U.S. Patents 3,711,406, 3,796,662, 3,933,659, 4,010,106, 4,129,508, 4,170,560, 4,231,883 and 4,795,583.
WO93/21288 21~ 10 9 8 PCT/US93/033X1 _ 3 Polyol fatty acid es~ers are a~so known tO ' mpart improved friction properties when added tO lube oil compositions. For example, Canadian Patent 1,205,451 discloses the use of a combination of a glycerol partial ester of a Cl6 - Cl8 fatty acid and an oil soluble organic copper compound in lubricant oils to enhance fuel economy. U.S.
Patent 3,933,659 discloses an automatic transmission fluid containing a polyol ester or fatty acid amides as friction modifiers.
Similarly, U.S. Patent 4,304,678 discloses hydroxyl-containing esters, including glycerol oleates, as effective friction modifiers for lubricant oils.
The present invention is based on the discovery that a combination of one or more alkoxylated hydrocarbylamines and one or more polyol fatty acid esters, as defined herein, added to lubricating oil compositions in specific proportions imparts a more enhanced friction modifying property to t~e lubricant than an equivalent quantity of either component alone.
SUMMARY OF THE INVENTION
The present invention provides an improved lubricating oil composition for automative internal combustion engines and transmissions which comprises an oil of lubricating viscosity havinq admixed therewith, in addition to conventional additives, a minor amount of friction modifier composition which reduces the coefficient of friction between moving mechanical parts, thereby WO93/21288 2 13 10 ~ 8 PCT/US93/03381 providing for enhanced fuel ecomony. The f~iction modifier composition comprises a combination of an alkoxylated hydrocarbyl amine and a polyol partial ester of a saturated or unsaturated fatty acid or a mixture of such esters. This combination of components provides for synergistic fuel ecomony effects, particularly when used as components in automotive crankcase lubricants also containing conventional additive packages, which effects are not observed in oil which contains one or the other of these components alone.
DETAILED DESCRIPTION
The alkoxylated amines which are suitable as one component of the friction modifier composition of this invention have the general formula l:
(R "ot~ f t (R'~ H (R O~H
and also include boronated derivatives thereof, wherein Rl is a branched or straight chain hydrocarbyl group containing from about 8 to about 30 carbon atoms, R2 and R3 are independently the same or different branched or straight chain alkylene radicals containing l to 6 carbon atoms, R4, R5 and R6 are independently the same or W O 93/21288 2 1 3 1 0 9 8 PC~r/US93/033X~
different aikylene radicals containing from 2 to 4 car~on atoms, ~ is oxygen or sulfur, p is 0 or an 1nteqer rangin~ from 1 to 20, ' is independently 0 ~ or l, and a, b and c are independently integers ranging from 1 to 4. In the more preferred em~odiment, Rl is a saturated or ethylenically unsaturated hydrocarbyl group containing from 12 to 24 carbon atoms, R2 and R3 independently contain 2-4 carbon atoms, R4, R5 and R independently contain 2 or 3 carbon atoms, X is oxygen and a, b and c are independently integers of 1 or 2. In the above formula, both p and t may be l or either p or t may be l when the other of them is 0, or p may be 1-20 when t is o.
In the most preferred em~odiment, the alkoxylated amine is a monoamine subgenus of formula 1, where p and t are each 0, having the formula 2:
2. ~ (R~o~ H
F~ --N~
(R~o,~
wherein R1, R , R5, a and b are as set forth above.
In the most preferred embodiment of the invention as set forth in formula 2, Rl is a saturated or ethylenically unsaturated hydrocarbyl group having from 12 to 24 carbon atoms, particularly a group derived from tallow amine, oleyl amine, s~earyl amine, lauryl amine, behynyl amine and the like as well as mixtures thereof, R4 and R each contain 2 or 3 carbon atoms, and a = ~ = l.
Illustrative of more ~preferred alkoxylated amines within the scope of this invention include N,N',N'-tri(2-hydroxyethyl) N-octadecyl propylene diamine, N,N',N'-tri(2-hydroxyethyl) N-octadecenyl propylene diamine, N,N',N'-tri(2-hydroxyethyl) N-hexadecyl propylene diamine, N,N',N'-tri(3-hydroxypropyl) N-octadecadienyl propylene diamine, N,N',N'-tri(2-hydroxyethyl) N-octadecyl ethylene diamine, N,N',N'-tri(2-hydroxyethyl) N-octadecenyl ethylene diamine, N,N',N'-tri(2-hydroxyethyl) N-tetradecyl propylene diamine, N,N-di(2-hydroxy-ethyl) oleyl amine, N,N-di-(2-hydroxyethyl) stearyl amine, N,N-di(3-hydroxypropyl) tetradecyl amine, N,N-di(2-hydroxyethyl) octadecylamine, N,N-di(2-hydroxyethyl) eicosylamine, N,N-di(2-hydroxyethyl) tallowamine, N,N-di(2-hydroxypropyl) tallowamine, N-(2-hydroxyethyl)-N-(hydroxyethoxyethyl)-n-dodecylamine, N,N-di(2-hydroxyethyl)-l-methyl-undecylamine, N,N-di(2-hydroxyethoxyethoxyethyl)- 7 - ethyl-octadecylamine, N,N-di(2-hydroxyethyl)-n-dodecyloxyethylamine, N,N-di(2-hydroxyethyl)-lauryloxyethylamine, N,N-di(2-hydroxyethyl)-stearyloxyethylamine, N,N-di(2-hydroxyethyl)-n-dodecyloxpropylamine, N,N-di(2-hydroxyethyl)-stearyloxypropylamine, N,N-di(2-hydroxyethyl)-dodecylthioethylamine, N,N-di(2-hydroxyethyl)-dodecylthiopropylamine, N,N-di(2-hydroxyethyl)-hexadecylthioethylamine, N,N-di(2-hydroxyethyl)-hexadecylthiopropylamine, 9 ~
N-2-hydroxyethyl,~-[N',N'-~is(2-hydr~oxyethyl) ethylamine3-octadecylamine, N-2-hydroxyethyl,N-[N',N'-~is(2-hydroxyethyl) ethylamine3-stearylamine, and the like, as well as boronated derivatives thereof.
Illustrative of the most preferreà alkoxylated amines are those of formula Z and wherein R4 and R5 each have 2 carbon atoms and include:
N,N-bis(2-hydroxyethyl) tallow-amine N,N-bis(2-hydroxyethyl)-n-dodecylamine N,N-bis(2-hydroxyethyl)-l-methyl-tridecenylamine N,N-bis(2-hydroxyethyl)-hexadecylamine N,N-~is(2-hydroxyethyl)-octadecylamine N,N-bis(2-hydroxyethyl)-octadecenylamine N,N-bis(2-hydroxyethyl)-oleylamine N,N-bis(2-hydroxyethyl)-stearylamine N,N-bis(2-hydroxyethyl)-undecylamine and boronated derivatives thereof.
The hydroxyl amine compounds may be used as such.
However they may also be used in the form of an adduct or reaction product with a boron compound, such as a boric oxide, a boron halide, a metaborate, boric acid, or a mono-, di-, or triorgano borate, such as a mono-, di-, and trialkyl borate. Such adducts or derivatives may be prepared by contacting the above amines with a boronating agent. Preferred boronation agents include boric acid and boric acid esters, e.g., tributyl borate. A stoichiometric amount of the boronating agent relative to the hydroxy groups present in the amine can be used or an excess of boronating agent of up to a 50-100% excess or more 213109 8 8 _ can De used and _s often desira~le for certain applications. Thus, boronation can be comple~e or partial. Usually boronation levels vary from a~out 0.05 to about 7 weight % of boron in the ~oronated derivative. ~
Preferably the boronated derivatives are prepared in the presence of an alcoholic or hydrocar~on solvent. The presence of a solvent is not essential, however. If one is used, it may be reactive or non-reactive. Suitable non-reactive solvents include benzene, toluene, xylene and the like. Suitable reactive solvents include isopropanol, butanol, the pentanols and the like.
Reaction temperatures may vary from about 70~ to about 2S0~C with about 110~ to about 170~C being preferred.
The second essential component of the friction modifier composition of this invention is one or a mixture of esters of a fatty acid having the formula 3:
(C H --R ' (~ ~
wherein R represents an alkylene or alkenylene hydrocarbyl radical having from 10 to 18 car~on atoms, R8 is the residuum of a polyhydric alcohol containing from 2 to 5 carbon atoms and from 2 to 4 W O 93/21288 2 ~ 31 0 9 8 PC~r/US93/03381 hydroxyl ~roups, e is o or l ana d is an integer o_ 1, 2 or 3.
~ In the more preferred embodiments of this invention R7 is an alkylene radical containing 14 to 16 carbon atoms, R8 is the residuum of glycerol, e is O and d is 1 or Z.
These esters are commercially available and may be prepared by forming the esterification product of a fatty acid such as oleic acid, stearic acid, linoleic acid, ricinoleic acid and the like with a suitable polyol such as ethylene glycol, propylene glycol, glycerol, pentaerythritol and the like by well known esterification processes.
The most preferred esters are the partial esters of oleic or ricinoleic acids and glycerol and include glycerol monooleate, glyceroldioleate, glycerolmonoricinoleate, glyceroldiricinoleate and mixtures thereof. Mixtures of glycerol monoleate and glycerol dioleate are most preferred.
The base lubricating oil into which the friction modifier composition of this invention may be incorporated includes automotive crankcase and transmission oils of lubricating viscosity for both diesel and gasoline engines, including natural and synthetic lubricating oils and mixtures thereof.
Natural oils include animal oils and vegetable oils such as castor oil or lard oil, liquid petroleum oils and hydrorefined oils, solvent-treated or acid-treated mineral lu~ricating oils of the paraffinic, naphthenic and mixeà
2131098 10 -~
parafflnic-napAthenic types. Oils of lubricallng viscosity derived from coal or shale are also useful base oils.
Synthetic lubricating oils include hydrocarbon and halo-substituted hydrocarbon oils such as polymerized and interpolymerized olefins (e.g., polybutylenes, polypropylenes, propylene-isobutylene copolymers, chlorinated polybutylenes, poly(l-hexenes), poly(l-octenes)~
poly(l-decenes); alkylbenezenes (e.g., dodecylbenzenes, tetradecylbenzenes, dinonylbenzenes, di(2-ethylhexyl) benzenes); and polyphenyls (e.g., biphenyls, terphenyls, al~ylated polyphenols).
Alkylene oxide polymers and interpolymers and derivatives thereof where the terminal hydroxyl groups have been modified by esterification or etherification constitute another class of known synthetic lubricating oils. These are exemplified by polyoxylalkylene polymers prepared by polymerization of ethylene oxide or propylene oxide, and include the alkyl and aryl ethers of these polyoxyalkylene polymers such as methyl-polyisopropylene glycol ether having an average molecular weight of 1000, diphenyl ether of poly-ethylene glycol having a molecular weight of 500-1000, diethyl ether of polypropylene glycol having a molecular weight of 1000-1500, and mono-and polycarboxylic esters thereof such as acetic acid esters, mixed C3 to C6 fatty acid esters and the C13 Oxo acid diester of tetraethylene glycol.
WO93/21288 2 1 3 1 0 9 8 PCT/US93/0338~
.,~,~ _ 1 ~nother suitable class or synthetic lubrlcating oils comprises one or more esters of dicar~oxylic acids (e.g., phthalic acid, succinic acid, alkyl succinic acids and alkenyl succinic acids, maleic acid, azelaic acid, suberic acid, sebasic acid, fumaric acid, adipic acid, linoleic acid dimer, malonic acid, alkylmalonic acids and alkenyl malonic acids) with a variety of alcohols (e.g., butyl alcohol, hexyl alcohol, dodecyl alcohol, 2-ethylhexyl alcohol, ethylene glycol, diethylene glycol monoether and propylene glycol). Specific examples of these esters include dibutyl adipate, di(2-ethylhexyl) sebacate, di-n-hexyl fumarate, dioctyl sebacate, diisooctyl azelate, diisodecyl azelate, dioctyl phthalate, dodecyl phthalate, dieicosyl sebacate, the 2-ethylhexyl diester of linoleic acid dimer, and the complex ester formed by reacting one mole of sebacic acid with two moles of tetraethylene glycol and two moles of 2-ethylhexanoic acid.
Esters useful as synthetic oils also include those made from C~ to C12 monocarboxylic acids and polyols and polyol ethers such as neopentyl glycol, trimethylolpropane, pentaerythritol, dipenta-erythritol and tripentaerythritol.
Silicon-~ased oils such as the polyalkyl, polyaryl-polyalkoxy-, or polyaryloxysiloxane oils and silicate oils comprise another useful class of synthetic lu~ricants. These include tetraethyl silicate, tetraisopropyl silicate, tetra-(2-ethylhexyl) silicate, tetra-(4-methyl-2-ethylhexyl) silicate tetra-(p-tert-~utyl-phenyl) silicate, hexa-(4-methyl-2-pentoxy) disiloxane, W O 93/21288 PC~r/US93/03381 2 i 3 ~ 0 9 8 '2 '_~
poly(methyl)siloxanes and poly(methylphenyl) siloxanes. Other synthetic lubricating oils include liquid esters of phosphorus-containin~
acids (e.g., tricresyl phosphate, trioctyl phosphate, diethyl ester of decylphosphonic acid) and polymeric tetrahydrofurans.
Unrefined, refined and rerefined oils can be used in the lubricants of the present invention.
Unrefined oils are those o~tained directly from a natural or synthetic source without further purification treatment. For example, a shale oil o~tained directly from retortin~ operations, a petroleum oil obtained directly from distillation or ester oil obtained directly from an esterification process and used without further treatment would be an unrefined oil. Refined oils are similar to the unrefined oi].s except they have been further treated in one or more purification steps to improve one or more properties. Many such purification techniques, such as distillation, solvent extraction, acid or base extraction, filtration and percolation are known to those skilled in the art. Rerefined oils are obtained by processes similar to those used to obtain refined oils, but applied to refined oils which have been already used in service. Such 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.
The components of the friction modifier composition of this invention are each blended into the lube oil base stock in amounts which reduce the friction ~13 1Q 98 ~_ 13 coefficient between the ~?~hAn;cal parts of the engine or other apparatus in which they are used, thereby enhancing fuel economy. Generally speaking, the amount of alkoxylated amine added to the base oil will range from about 0.1 to 1.0% by weight, more preferably from about 0.2 to 0.5% by weight. The amount of fatty acid ester added to the base oil will range from about 0.1 to 1.0~ by weight, more preferably from about 0.2 to 0.5% by weight. The preferred weight ratio of the alkoxylated amine to t~e ester is in the range of from about 0.4 to 2.S:l respectively, more preferably ~rom about 0.75 to 1.5:1 respecti~ely.
Most preferably these components are added in approximately equi-weight amounts.
The lubricant oil of this invention is preferably also admixed with one or more additional additiYes to form a fully formulated oil. Such additives include dispersants, detergents, oxidation inhibitors, viscosity modifiers, corrosion inhibitors, other friction modifiers, antifoaming agents, anti wear agents and the like.
Suitable dispersants which may be employed are known in the art. A preferred class of dispersant are the ashless dispersants which are normally nitrogen-containing, oil-soluble salts, amides, imides or esters of mono or dicarboxylic acids. A
particularly preferred dispersant is the reaction product of a polyolefin-substituted succinic anhydride such as polyisobutenyl succinic anhydride and an alkylene polyamine, which can be further treated with a source of boron or copper. Such a material is disclosed in U.S. Patent 4,938,880.
~ 14 ~ a ~
Such dispersants are generally added to the oil in amounts ranging from about 0.1 to about 10~ by weight Metal containing rust inhibitors and/or detergents are frequently used with ashless dispersants. Such detergents and rust inhibitors include the metal salts of sulphonic acids, fatty acid esters such as glycerol mono and/or di stearate (which - also function as friction modifiers), alkyl phenols, sulfurized alkyl phenols, alkyl salicylates, naphthenates, and other oil soluble mono- and di-carboxyliC acids. Highly basic, that is overbased metal salts, which are frequently used as detergents include calcium ar magnesium phenates, sulfurized phenates and/or sulfonates. Usually these metal containing inhibitors and detergents are used in lubricating oil in amounts of about 0.01 to 10 wt. ~, more preferably about 0.1 to 5 wt. %, based on the weight of the total lubricating composition. Marine diesel lubricating oils typically employ such metal-containing rust inhibitors and detergents in amounts up to about 20 wt. %.
The lube oil may also contain one or more suitable antioxidants and/or oxidation inhibitors. Suitable antioxidants include phenols, hindered phenols, bis-phenols, sulfurized phenols, catechol, alkylate~ and sulfurized alkylated catechols, diphenylamine, alkylated diphenylamines and phenyl-l-naphthlamines, alkyl and aryl borates, phosphites and phosphates, trialkyl and triaryl dithiophosphates and the like. Other antioxidants :
include oil soluble copper compounds. The copper compound may be in the cuprous and cupric form.
The copper may be in the form of copper dihydrocarbyl thio- or dithio-phosphates.
Alternatively the copper may be added as the copper salt of a synthetic or natural carboxylic acid.
Examples include C10 to C18 fatty acids such as stearic or palmitic. Unsaturated acids such as oleic or branched carboxylic acids such as napththenic acids of molecular weight from 200 to 500 or synthetic carboxylic acids are preferred because of the improved handling and solubility properties of the resulting copper carboxylates.
Also useful are oil soluble copper dithiocarbamates. Copper sulphonates, phenates, and acetylacetonates may also be used. The copper antioxidant can comprise a copper salt of a hydrocarbyl substituted C4 to C10 monounsaturated dicarboxylic acid producing reaction product, which reaction product is formed by reacting a polymer of a C2 to C10 monoolefin having a num~er average molecular weight of 900 to 1400 (e.g., 700 to 1200) substituted with a C4 to C10 monosaturated acid material. Exemplary are copper salts of a hydrocarbyl substituted C4 to C10 monounsaturated dicarboxylic acid producinq reaction product, which reaction product is formed by reacting a polymer of C2 to C10 monoolefin having a number average molecular weight of from 900 to 1400 substituted with succinic moieties selected from the group consisting of acid, anhydride and ester groups, wherein there is an averaqe of about 0.8 to 1.6 molar proportions of succinic moieties per molar proportion of the polymer.
2~3 ~09~ 16 T~e copper antioxldants will generally be added to the oil in an amount of from about 50-500 ppm ~y weight of the metal.
Corrosion inhi~itors, also known as anti-corrosive agents, reduce the degradation of the metallic parts contacted by the lubricating oil composition.
Illustrative of corrosion inhibitors are phosphosulfurized hydrocarbons and the products obtained by reaction of a phosphosulfurized hydrocarbon with an alkaline earth metal oxide or hydroxide, preferably in the presence of an alkylated phenol or of an alkylphenol thioester, and also preferably in the presence of car~on dioxide. Phosphosulfurized hydrocarbons are prepared by reacting a suitable hydrocarbon such as a terpene, a heavy petroleum fraction of a C2 to C6 olefin polymer such as polyisobutylene, with from 5 to 30 weight percent of a sulfide of phosphorus for 0.5 to 15 hours, at a temperature in the range of 150~ to 600~C. Neutralization of the phosphosulfurized hydrocar~on may be effected in the manner taught in U.S. Patent l,969,324.
oxidation inhibitors reduce the tendency of mineral oils 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 viscosity growth. Such oxidation inhibitors include alkaline earth metal salts of alkylphenolthioesters having preferably C5 to Cl2 alkyl side chains, calcium nonylphenol sulfide, barium t-octylphenyl sulfide, dioctylphenylamine, phenylalphanaphthylamine, phosphosulfurized or sulfurized hydrocarbons, etc.
WO93/21288 2 1 3 1 0 9 ~ PCT/US93/03381 ;7 Pour polnt depressan~s iower the tempera~ure a~
which the oil will flow or can be poured. Such depressants are well known. Typical o~ those additives which usefully optimize the low temperature fluidity of the oil are C -C
dialkylfumarate/vinyl acetate copolymers, polymethacrylates, and wax napthalene.
Foam control can be provided by an antifoamant of the polysiloxane type, e.g. silicone oil and polydimethyl siloxane.
Another class of additive that can be included in the oil are the dihydrocar~yl dithiophosphate metal salts which are frequently used as anti-wear agents and which also provide antioxidant activity. These compounds may be generally characterized by the formula fR O~ ~
( ~SS ~ M
~R ~ J
wherein R9 and R10 are each independently hydrocaryl groups containing from 3 to about 13 car~on atoms, M is a metal and n is an integer equal to the valence of M. The hydrocarbyl groups in the phosphorodithioate structure include alkyl, ~ cycloalkyl or alkaryl groups which may contain ether or ester linkages and which may also contain su~stituent groups such as halogen or nitro.
2 ~3 1~98 18 __ Illus~ra~ive alkyl groups include lsopropyl, isobutyl, n-butyl, sec-butyl, amyl, n-hexyl, methylisobutyl car~inyl, heptyl, 2-ethylhexyl, diisobutyl, isooctyl, nonyl, behenyl, decyl, dodecyl, tridecyl, etc. Illustrati~e lower alkylphenyl groups include xylyl, cresyl, butylphenyl, amylphenyl, heptyl-phenyl, etc.
Cycloalkyl groups likewise aré useful and these include chiefly cyclohexyl and the lower alkyl-cyclohexyl radicals. Many substituted hydrocarbon groups may also be used, e.g., chloropentyl, dichlorophenyl, and dichlorodecyl.
These compounds are prepared by first forming t~e relevant phosphorodithioic acid and then reacting this product with a suitable metal containing compound.
The phosphorodithioic acids are prepared by the reaction of phosphorus pentasulfide with an alcohol or phenol or mixtures of alcohols, mixtures of phenols or mixtures of alcohols and phenols. The reaction inYolves four moles of the alcohol or phenol per mole of phosphorus pentasulfide, and may be carried out within the temperature range from about 50~C to about 200~C, preferably from about 50~C to about 150~C. Thus the preparation of 0,0-di-n-hexyl phosphorodithioic acid involves the reaction of phosphorus pentasulfide with four moles of n-hexyl alcohol at about lO0 C for about two hours. Hydrogen sulfide is liberated and the residue is the defined acid. The preparation of the metal salt of this acid may be effected by reaction with metal oxide. Simply mixing and heating these two reactants is sufficient to cause WO93/21288 2 1 3 1 0 9 ~ PCT/US93/03381 ~_ 19 the reaction .~ ~ake ~lace and tne resultin~
product is sufficiently pure for t~e purposes of this invention.
The metal salts of dihydrocarbyl phosphorodithioates which are useful in this invention include those salts containing Group I
metals, Group II metals, aluminum, lead, tin, manganese, cobalt, and nic~el. The Group II
metals, tin, iron, cobalt, lead, manganese, nickel and copper are amonq the preferred metals. Zinc and copper are especially useful metals. Examples of metal compounds which may be reacted with the acid include 'ithium oxide, lithium hydroxide, sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, silver oxide, magnesium oxide, magnesium hydroxide, calcium oxide, zinc hydroxide, zinc oxide, copper oxide, strontium hydroxide, cadmium oxide, cadmium hydroxide, barium oxide, iron carbonate, copper hydroxide, lead hydroxide, tin butylate, cobalt hydroxide, nic~el hydroxide, nic~el carbonate and the like.
In some instances, the incorporation of certain ingredients such as small amounts of the metal acetate or acetic acid in conjunction with the metal reactant will facilitate the reaction and result in an improved product. For example, the use of up to about 5% of zinc acetate in combination with the required amount of zinc oxide facilitates the formation of a zinc phosphorodithioate.
~1310~8 ~.o In one oreferred embodiment, the alkyl groups R-and R-0 in the formula above are derived from secondary alcohols such as lsopropyl alcohol, secondary butyl alcohol, 2-pentanol, 4-methyl-2-pentanol, 2-hexanol, 3-hexanol, as well as mixtures thereof.
These compounds are generally incorporated into the lubricating oil formulation in the range of from about 0.01 to about 5% by weight, more preferably from about 0.1 to about 3% by weight. ~he preferred compounds are the zinc dihydrocarbyl dithiophosphites.
Viscoslty modifiers impart high and low temperature operability to the lubricating oil and permit it to remain relatively viscous at elevated temperatures and also exhibit acceptable viscosity or fluidity at low temperatures. Viscosity modifiers are generally high molecular weight polymers, including polyesters, polymethacrylates, polyacrylates and polyolefins. The viscosity modifiers may also be deri~atized to include other properties or functions, such as the addition of dispersancy properties. These oil soluble viscosity modifylnq polymers will generally have number average molecular weights of from 103 to 106, preferably 104 to lo6/ e.g., 20,000 to 250,000, as determined by gel permeation chromotography or osmometry.
Examples of suitable hydrocarbon polymers include homopolymers and copolymers of two or more C2 to C30 olefin monomers, e.g. C2 to C8 olefins, including both alpha olefins and internal olefins, which may be straight or branched, aliphatic, WO93/21288 2131 0 9 8 PC~/US93/03381 aromatic, alkyi-aromatic, cycloaliphatic, etc.
Particularly preferred polymers are polyiso~utylenes, homopolymers and copolymers of C2 and higher alpha olefins, atactic polypropylene, hydrogenated polymers and copolymers and terpolymers of styrene, e.g. with isoprene andJor butadiene and hydrogenated derivatives thereof.
The polymer may be degraded in molecular weight, for example by mastication, extrusion, oxidation or thermal degradation, and may contain oxygen.
These viscosity modifiers are normally added to the oil composition at a level within the range of from about O.l to about 10% by weight.
It may also be desirable to include an additive which serves to stabilize the compatibility of lu~ricant compositions containing relatively high levels of friction modifiers. ~Y~m~les of such additives include hydrocarbyl substituted succinic anhydrides, more preferably polyolefin-substituted succinic anhydride wherein the polyolefin has a number average molecular weight of from about 500 to lO,000, more preferably from about lO00 to 3000.
Preferred polyolefin substituent groups include polyisobutylene, polybutene-l, as well as copolymers of butene-l with ethylene and/or propylene. Polyisobutyenyl succinic anhydride is a preferred compati~ilizer for this purpose. This ingredient may be present in the lubricant composition at a level within the range of about O.l to 5% by weight, and is preferably present at about the same level as the total weight of friction modifier additives.
2 1 3 ~
CompositiOns which contain one or more of these numerous additives are typically blended by physical admixture into the lube oil in amounts - effective to provide their normal attendant function.
The improved lu~rication enhancement offered by compositions within the scope of this invention can be demonstrated using what is referred to as a Sequence VI Dynanometer Fuel Economy test, more specifically described as the ASTM Sequence VI test method RR: D0-2: 1204. This test is run using a 3.8 liter Buic~*V-6 engine equipped with cooling means to maintain a relatively constant engine oil temperature of 150 F or 275 F, coupled to a power absorbing dynanometer such that the engine speed and power output can be tightly controlled.
The lubricant to be evaluated is first flushed into the engine and aged at an oil temperature of 225 deg. F for 32 hours. The engine is then set to a specific speed and power output, and the test is conducted at the temperature for the two test stages of 150 deg. F and 27~ deg. F. The engine is calibrated prior to each candidate run, using industry standard viscosity and friction modified reference oils. At each stage the average brake specific consumption is calculated. After the completion of the measurement stages, the lubricant in the engine is detergent flushed then flushed to an SAE 30 baseline oil and the measurements are repeated. These measurements are then used to calculate the Equivalent Fuel Economy Improvement (EFEI) of the candidate relative to the baseline oil.
*trade-mark WO93/21288 213109~
Data reported here was collec~ed either from the full ASTM sequence vI tesl cycle or a shortened version of the Sequence VI test, referred to as a Sequence VI screener test, in which the test oil is aged for a reduced period of time.
The following Examples further illustrate the invention.
ExamPles 1-3 A base control SAE l0W-30 formulation was prepared by mixing about 94 parts by volume of mineral oil with effective amounts of the following additive ingredients to total l00 parts:
a) - Polybutenyl succinic anhydride polyamine product (borated);
b) - Basic Magnesium petroleum sulfonate;
c) - Zinc salt of methyl isobutyl carbinol phosphorodithioate;
d) - Mixed nonyl phenol sulfides e) - Calcium petroleum sulfonate (neutral) f) - Oil soluble copper antioxidant g) - bis alkaryl amine h) - Deemulsifier i) - Antifoamant j) - Pour Point Depressant k) - Viscosity Modifier Taking this base control formulation, the following friction modifier ingredients were added in the following amounts by volume (V.):
~3~0g~ 24 _~
Example l: Control formulation 1 0.5% v. glycerol oleate esters Example 2: Control formulation t 0.5% V. N,N-bis (2-hydroxyethyl) tallow amine Example 3: Control formulation + 0.25% V. glycerol oleate esters + 0.25% V. N,N-bis (2-hydroxyethyl) tallow amine.
The Control formulation and each of the formulations of Examples 1-3 were subjected to a Sequence VI dynanometer fuel economy screener test.
The recorded EFEI test results are as follows:
EFEI Test Result Control l.17 Example l 2.44 Example 2 3.10 Example 3 3.14 The test results show that each of the glycerol oleate mixtures and N,N-bis (2-hydroxyethyl) tallow amine exhibit enhanced fuel efficiency in the base formulation when added to the control formulation at a 0.5~ by volume concentration, with the N,N-bis (2-hydroxyethyl) tallow amine being somewhat superior.
The EFEI result of 3.14 achieved by combining N,N-bis (2-hydroxyethyl) tallow amine and the glycerol oleate mixture each at 0.25% by ~olume concentration is therefore much higher than expected, and even higher than N,N-~is (2-hydroxyethyl) tallow amine used alone at the O.S% by volume concentration.
ExamDles 4-6 Three additional oil formulations similar to the above were prepared. The main difference was that the additive component (c) in Examples 1-3 was replaced by the zinc salt of miY~ butane-2-ol and isooctanol phospnorodithioate.
Example 4: Control formulation + 0.25% V. N,N-bis (2-hydroxyethyl) tallow amine Example 5: Control formulation + 0.5% V. N,N-bis (2-hydroxyethyl) tallow amine.
Exmaple 6: Control formulation + 0.25% V. glycerol oleate mixtures + 0.25% V. N,N-~is (2-hydroxyethyl) tallow amine.
Each formulation was subjected to a Standard Sequence dynanometer test and the recorded EFEI
results were as follows:
2~3~098 Example 4 l.94 Example 5 2.48 Example 6 2.67 These results once again demonstrate the EFEI test results based the combination of N,N-bis (2-hydroxyethyl) tallow amine and the glycerol oleate mixtures each present at a 0.25% by volume concentration are superior to results achieved using N,N-bis (2-hydroxyethyl) tallow amine alone at 0.2S% by volume and O.S% by volume concentrations respectively.
Patent No. 3,932,290 which discloses reaction products of di-(lower alkyl) phosphites and epoxides; and U.S. Patent No. 4,028,258 which discloses the alkylene oxide adduct of phosphosulfurized N-(hydroxyalkyl) alkenyl succinimides.
Another known category of friction modifiers includes alkoxylated hydrocarbyl mono or polyamines such as generally illustrated by formulas 1 and 2 below. These amines include materials such as N,N-bis(2-hydroxyalkyl) hydrocarDyl amines such as disclosed in U.S. Patents 3,711,406, 3,796,662, 3,933,659, 4,010,106, 4,129,508, 4,170,560, 4,231,883 and 4,795,583.
WO93/21288 21~ 10 9 8 PCT/US93/033X1 _ 3 Polyol fatty acid es~ers are a~so known tO ' mpart improved friction properties when added tO lube oil compositions. For example, Canadian Patent 1,205,451 discloses the use of a combination of a glycerol partial ester of a Cl6 - Cl8 fatty acid and an oil soluble organic copper compound in lubricant oils to enhance fuel economy. U.S.
Patent 3,933,659 discloses an automatic transmission fluid containing a polyol ester or fatty acid amides as friction modifiers.
Similarly, U.S. Patent 4,304,678 discloses hydroxyl-containing esters, including glycerol oleates, as effective friction modifiers for lubricant oils.
The present invention is based on the discovery that a combination of one or more alkoxylated hydrocarbylamines and one or more polyol fatty acid esters, as defined herein, added to lubricating oil compositions in specific proportions imparts a more enhanced friction modifying property to t~e lubricant than an equivalent quantity of either component alone.
SUMMARY OF THE INVENTION
The present invention provides an improved lubricating oil composition for automative internal combustion engines and transmissions which comprises an oil of lubricating viscosity havinq admixed therewith, in addition to conventional additives, a minor amount of friction modifier composition which reduces the coefficient of friction between moving mechanical parts, thereby WO93/21288 2 13 10 ~ 8 PCT/US93/03381 providing for enhanced fuel ecomony. The f~iction modifier composition comprises a combination of an alkoxylated hydrocarbyl amine and a polyol partial ester of a saturated or unsaturated fatty acid or a mixture of such esters. This combination of components provides for synergistic fuel ecomony effects, particularly when used as components in automotive crankcase lubricants also containing conventional additive packages, which effects are not observed in oil which contains one or the other of these components alone.
DETAILED DESCRIPTION
The alkoxylated amines which are suitable as one component of the friction modifier composition of this invention have the general formula l:
(R "ot~ f t (R'~ H (R O~H
and also include boronated derivatives thereof, wherein Rl is a branched or straight chain hydrocarbyl group containing from about 8 to about 30 carbon atoms, R2 and R3 are independently the same or different branched or straight chain alkylene radicals containing l to 6 carbon atoms, R4, R5 and R6 are independently the same or W O 93/21288 2 1 3 1 0 9 8 PC~r/US93/033X~
different aikylene radicals containing from 2 to 4 car~on atoms, ~ is oxygen or sulfur, p is 0 or an 1nteqer rangin~ from 1 to 20, ' is independently 0 ~ or l, and a, b and c are independently integers ranging from 1 to 4. In the more preferred em~odiment, Rl is a saturated or ethylenically unsaturated hydrocarbyl group containing from 12 to 24 carbon atoms, R2 and R3 independently contain 2-4 carbon atoms, R4, R5 and R independently contain 2 or 3 carbon atoms, X is oxygen and a, b and c are independently integers of 1 or 2. In the above formula, both p and t may be l or either p or t may be l when the other of them is 0, or p may be 1-20 when t is o.
In the most preferred em~odiment, the alkoxylated amine is a monoamine subgenus of formula 1, where p and t are each 0, having the formula 2:
2. ~ (R~o~ H
F~ --N~
(R~o,~
wherein R1, R , R5, a and b are as set forth above.
In the most preferred embodiment of the invention as set forth in formula 2, Rl is a saturated or ethylenically unsaturated hydrocarbyl group having from 12 to 24 carbon atoms, particularly a group derived from tallow amine, oleyl amine, s~earyl amine, lauryl amine, behynyl amine and the like as well as mixtures thereof, R4 and R each contain 2 or 3 carbon atoms, and a = ~ = l.
Illustrative of more ~preferred alkoxylated amines within the scope of this invention include N,N',N'-tri(2-hydroxyethyl) N-octadecyl propylene diamine, N,N',N'-tri(2-hydroxyethyl) N-octadecenyl propylene diamine, N,N',N'-tri(2-hydroxyethyl) N-hexadecyl propylene diamine, N,N',N'-tri(3-hydroxypropyl) N-octadecadienyl propylene diamine, N,N',N'-tri(2-hydroxyethyl) N-octadecyl ethylene diamine, N,N',N'-tri(2-hydroxyethyl) N-octadecenyl ethylene diamine, N,N',N'-tri(2-hydroxyethyl) N-tetradecyl propylene diamine, N,N-di(2-hydroxy-ethyl) oleyl amine, N,N-di-(2-hydroxyethyl) stearyl amine, N,N-di(3-hydroxypropyl) tetradecyl amine, N,N-di(2-hydroxyethyl) octadecylamine, N,N-di(2-hydroxyethyl) eicosylamine, N,N-di(2-hydroxyethyl) tallowamine, N,N-di(2-hydroxypropyl) tallowamine, N-(2-hydroxyethyl)-N-(hydroxyethoxyethyl)-n-dodecylamine, N,N-di(2-hydroxyethyl)-l-methyl-undecylamine, N,N-di(2-hydroxyethoxyethoxyethyl)- 7 - ethyl-octadecylamine, N,N-di(2-hydroxyethyl)-n-dodecyloxyethylamine, N,N-di(2-hydroxyethyl)-lauryloxyethylamine, N,N-di(2-hydroxyethyl)-stearyloxyethylamine, N,N-di(2-hydroxyethyl)-n-dodecyloxpropylamine, N,N-di(2-hydroxyethyl)-stearyloxypropylamine, N,N-di(2-hydroxyethyl)-dodecylthioethylamine, N,N-di(2-hydroxyethyl)-dodecylthiopropylamine, N,N-di(2-hydroxyethyl)-hexadecylthioethylamine, N,N-di(2-hydroxyethyl)-hexadecylthiopropylamine, 9 ~
N-2-hydroxyethyl,~-[N',N'-~is(2-hydr~oxyethyl) ethylamine3-octadecylamine, N-2-hydroxyethyl,N-[N',N'-~is(2-hydroxyethyl) ethylamine3-stearylamine, and the like, as well as boronated derivatives thereof.
Illustrative of the most preferreà alkoxylated amines are those of formula Z and wherein R4 and R5 each have 2 carbon atoms and include:
N,N-bis(2-hydroxyethyl) tallow-amine N,N-bis(2-hydroxyethyl)-n-dodecylamine N,N-bis(2-hydroxyethyl)-l-methyl-tridecenylamine N,N-bis(2-hydroxyethyl)-hexadecylamine N,N-~is(2-hydroxyethyl)-octadecylamine N,N-bis(2-hydroxyethyl)-octadecenylamine N,N-bis(2-hydroxyethyl)-oleylamine N,N-bis(2-hydroxyethyl)-stearylamine N,N-bis(2-hydroxyethyl)-undecylamine and boronated derivatives thereof.
The hydroxyl amine compounds may be used as such.
However they may also be used in the form of an adduct or reaction product with a boron compound, such as a boric oxide, a boron halide, a metaborate, boric acid, or a mono-, di-, or triorgano borate, such as a mono-, di-, and trialkyl borate. Such adducts or derivatives may be prepared by contacting the above amines with a boronating agent. Preferred boronation agents include boric acid and boric acid esters, e.g., tributyl borate. A stoichiometric amount of the boronating agent relative to the hydroxy groups present in the amine can be used or an excess of boronating agent of up to a 50-100% excess or more 213109 8 8 _ can De used and _s often desira~le for certain applications. Thus, boronation can be comple~e or partial. Usually boronation levels vary from a~out 0.05 to about 7 weight % of boron in the ~oronated derivative. ~
Preferably the boronated derivatives are prepared in the presence of an alcoholic or hydrocar~on solvent. The presence of a solvent is not essential, however. If one is used, it may be reactive or non-reactive. Suitable non-reactive solvents include benzene, toluene, xylene and the like. Suitable reactive solvents include isopropanol, butanol, the pentanols and the like.
Reaction temperatures may vary from about 70~ to about 2S0~C with about 110~ to about 170~C being preferred.
The second essential component of the friction modifier composition of this invention is one or a mixture of esters of a fatty acid having the formula 3:
(C H --R ' (~ ~
wherein R represents an alkylene or alkenylene hydrocarbyl radical having from 10 to 18 car~on atoms, R8 is the residuum of a polyhydric alcohol containing from 2 to 5 carbon atoms and from 2 to 4 W O 93/21288 2 ~ 31 0 9 8 PC~r/US93/03381 hydroxyl ~roups, e is o or l ana d is an integer o_ 1, 2 or 3.
~ In the more preferred embodiments of this invention R7 is an alkylene radical containing 14 to 16 carbon atoms, R8 is the residuum of glycerol, e is O and d is 1 or Z.
These esters are commercially available and may be prepared by forming the esterification product of a fatty acid such as oleic acid, stearic acid, linoleic acid, ricinoleic acid and the like with a suitable polyol such as ethylene glycol, propylene glycol, glycerol, pentaerythritol and the like by well known esterification processes.
The most preferred esters are the partial esters of oleic or ricinoleic acids and glycerol and include glycerol monooleate, glyceroldioleate, glycerolmonoricinoleate, glyceroldiricinoleate and mixtures thereof. Mixtures of glycerol monoleate and glycerol dioleate are most preferred.
The base lubricating oil into which the friction modifier composition of this invention may be incorporated includes automotive crankcase and transmission oils of lubricating viscosity for both diesel and gasoline engines, including natural and synthetic lubricating oils and mixtures thereof.
Natural oils include animal oils and vegetable oils such as castor oil or lard oil, liquid petroleum oils and hydrorefined oils, solvent-treated or acid-treated mineral lu~ricating oils of the paraffinic, naphthenic and mixeà
2131098 10 -~
parafflnic-napAthenic types. Oils of lubricallng viscosity derived from coal or shale are also useful base oils.
Synthetic lubricating oils include hydrocarbon and halo-substituted hydrocarbon oils such as polymerized and interpolymerized olefins (e.g., polybutylenes, polypropylenes, propylene-isobutylene copolymers, chlorinated polybutylenes, poly(l-hexenes), poly(l-octenes)~
poly(l-decenes); alkylbenezenes (e.g., dodecylbenzenes, tetradecylbenzenes, dinonylbenzenes, di(2-ethylhexyl) benzenes); and polyphenyls (e.g., biphenyls, terphenyls, al~ylated polyphenols).
Alkylene oxide polymers and interpolymers and derivatives thereof where the terminal hydroxyl groups have been modified by esterification or etherification constitute another class of known synthetic lubricating oils. These are exemplified by polyoxylalkylene polymers prepared by polymerization of ethylene oxide or propylene oxide, and include the alkyl and aryl ethers of these polyoxyalkylene polymers such as methyl-polyisopropylene glycol ether having an average molecular weight of 1000, diphenyl ether of poly-ethylene glycol having a molecular weight of 500-1000, diethyl ether of polypropylene glycol having a molecular weight of 1000-1500, and mono-and polycarboxylic esters thereof such as acetic acid esters, mixed C3 to C6 fatty acid esters and the C13 Oxo acid diester of tetraethylene glycol.
WO93/21288 2 1 3 1 0 9 8 PCT/US93/0338~
.,~,~ _ 1 ~nother suitable class or synthetic lubrlcating oils comprises one or more esters of dicar~oxylic acids (e.g., phthalic acid, succinic acid, alkyl succinic acids and alkenyl succinic acids, maleic acid, azelaic acid, suberic acid, sebasic acid, fumaric acid, adipic acid, linoleic acid dimer, malonic acid, alkylmalonic acids and alkenyl malonic acids) with a variety of alcohols (e.g., butyl alcohol, hexyl alcohol, dodecyl alcohol, 2-ethylhexyl alcohol, ethylene glycol, diethylene glycol monoether and propylene glycol). Specific examples of these esters include dibutyl adipate, di(2-ethylhexyl) sebacate, di-n-hexyl fumarate, dioctyl sebacate, diisooctyl azelate, diisodecyl azelate, dioctyl phthalate, dodecyl phthalate, dieicosyl sebacate, the 2-ethylhexyl diester of linoleic acid dimer, and the complex ester formed by reacting one mole of sebacic acid with two moles of tetraethylene glycol and two moles of 2-ethylhexanoic acid.
Esters useful as synthetic oils also include those made from C~ to C12 monocarboxylic acids and polyols and polyol ethers such as neopentyl glycol, trimethylolpropane, pentaerythritol, dipenta-erythritol and tripentaerythritol.
Silicon-~ased oils such as the polyalkyl, polyaryl-polyalkoxy-, or polyaryloxysiloxane oils and silicate oils comprise another useful class of synthetic lu~ricants. These include tetraethyl silicate, tetraisopropyl silicate, tetra-(2-ethylhexyl) silicate, tetra-(4-methyl-2-ethylhexyl) silicate tetra-(p-tert-~utyl-phenyl) silicate, hexa-(4-methyl-2-pentoxy) disiloxane, W O 93/21288 PC~r/US93/03381 2 i 3 ~ 0 9 8 '2 '_~
poly(methyl)siloxanes and poly(methylphenyl) siloxanes. Other synthetic lubricating oils include liquid esters of phosphorus-containin~
acids (e.g., tricresyl phosphate, trioctyl phosphate, diethyl ester of decylphosphonic acid) and polymeric tetrahydrofurans.
Unrefined, refined and rerefined oils can be used in the lubricants of the present invention.
Unrefined oils are those o~tained directly from a natural or synthetic source without further purification treatment. For example, a shale oil o~tained directly from retortin~ operations, a petroleum oil obtained directly from distillation or ester oil obtained directly from an esterification process and used without further treatment would be an unrefined oil. Refined oils are similar to the unrefined oi].s except they have been further treated in one or more purification steps to improve one or more properties. Many such purification techniques, such as distillation, solvent extraction, acid or base extraction, filtration and percolation are known to those skilled in the art. Rerefined oils are obtained by processes similar to those used to obtain refined oils, but applied to refined oils which have been already used in service. Such 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.
The components of the friction modifier composition of this invention are each blended into the lube oil base stock in amounts which reduce the friction ~13 1Q 98 ~_ 13 coefficient between the ~?~hAn;cal parts of the engine or other apparatus in which they are used, thereby enhancing fuel economy. Generally speaking, the amount of alkoxylated amine added to the base oil will range from about 0.1 to 1.0% by weight, more preferably from about 0.2 to 0.5% by weight. The amount of fatty acid ester added to the base oil will range from about 0.1 to 1.0~ by weight, more preferably from about 0.2 to 0.5% by weight. The preferred weight ratio of the alkoxylated amine to t~e ester is in the range of from about 0.4 to 2.S:l respectively, more preferably ~rom about 0.75 to 1.5:1 respecti~ely.
Most preferably these components are added in approximately equi-weight amounts.
The lubricant oil of this invention is preferably also admixed with one or more additional additiYes to form a fully formulated oil. Such additives include dispersants, detergents, oxidation inhibitors, viscosity modifiers, corrosion inhibitors, other friction modifiers, antifoaming agents, anti wear agents and the like.
Suitable dispersants which may be employed are known in the art. A preferred class of dispersant are the ashless dispersants which are normally nitrogen-containing, oil-soluble salts, amides, imides or esters of mono or dicarboxylic acids. A
particularly preferred dispersant is the reaction product of a polyolefin-substituted succinic anhydride such as polyisobutenyl succinic anhydride and an alkylene polyamine, which can be further treated with a source of boron or copper. Such a material is disclosed in U.S. Patent 4,938,880.
~ 14 ~ a ~
Such dispersants are generally added to the oil in amounts ranging from about 0.1 to about 10~ by weight Metal containing rust inhibitors and/or detergents are frequently used with ashless dispersants. Such detergents and rust inhibitors include the metal salts of sulphonic acids, fatty acid esters such as glycerol mono and/or di stearate (which - also function as friction modifiers), alkyl phenols, sulfurized alkyl phenols, alkyl salicylates, naphthenates, and other oil soluble mono- and di-carboxyliC acids. Highly basic, that is overbased metal salts, which are frequently used as detergents include calcium ar magnesium phenates, sulfurized phenates and/or sulfonates. Usually these metal containing inhibitors and detergents are used in lubricating oil in amounts of about 0.01 to 10 wt. ~, more preferably about 0.1 to 5 wt. %, based on the weight of the total lubricating composition. Marine diesel lubricating oils typically employ such metal-containing rust inhibitors and detergents in amounts up to about 20 wt. %.
The lube oil may also contain one or more suitable antioxidants and/or oxidation inhibitors. Suitable antioxidants include phenols, hindered phenols, bis-phenols, sulfurized phenols, catechol, alkylate~ and sulfurized alkylated catechols, diphenylamine, alkylated diphenylamines and phenyl-l-naphthlamines, alkyl and aryl borates, phosphites and phosphates, trialkyl and triaryl dithiophosphates and the like. Other antioxidants :
include oil soluble copper compounds. The copper compound may be in the cuprous and cupric form.
The copper may be in the form of copper dihydrocarbyl thio- or dithio-phosphates.
Alternatively the copper may be added as the copper salt of a synthetic or natural carboxylic acid.
Examples include C10 to C18 fatty acids such as stearic or palmitic. Unsaturated acids such as oleic or branched carboxylic acids such as napththenic acids of molecular weight from 200 to 500 or synthetic carboxylic acids are preferred because of the improved handling and solubility properties of the resulting copper carboxylates.
Also useful are oil soluble copper dithiocarbamates. Copper sulphonates, phenates, and acetylacetonates may also be used. The copper antioxidant can comprise a copper salt of a hydrocarbyl substituted C4 to C10 monounsaturated dicarboxylic acid producing reaction product, which reaction product is formed by reacting a polymer of a C2 to C10 monoolefin having a num~er average molecular weight of 900 to 1400 (e.g., 700 to 1200) substituted with a C4 to C10 monosaturated acid material. Exemplary are copper salts of a hydrocarbyl substituted C4 to C10 monounsaturated dicarboxylic acid producinq reaction product, which reaction product is formed by reacting a polymer of C2 to C10 monoolefin having a number average molecular weight of from 900 to 1400 substituted with succinic moieties selected from the group consisting of acid, anhydride and ester groups, wherein there is an averaqe of about 0.8 to 1.6 molar proportions of succinic moieties per molar proportion of the polymer.
2~3 ~09~ 16 T~e copper antioxldants will generally be added to the oil in an amount of from about 50-500 ppm ~y weight of the metal.
Corrosion inhi~itors, also known as anti-corrosive agents, reduce the degradation of the metallic parts contacted by the lubricating oil composition.
Illustrative of corrosion inhibitors are phosphosulfurized hydrocarbons and the products obtained by reaction of a phosphosulfurized hydrocarbon with an alkaline earth metal oxide or hydroxide, preferably in the presence of an alkylated phenol or of an alkylphenol thioester, and also preferably in the presence of car~on dioxide. Phosphosulfurized hydrocarbons are prepared by reacting a suitable hydrocarbon such as a terpene, a heavy petroleum fraction of a C2 to C6 olefin polymer such as polyisobutylene, with from 5 to 30 weight percent of a sulfide of phosphorus for 0.5 to 15 hours, at a temperature in the range of 150~ to 600~C. Neutralization of the phosphosulfurized hydrocar~on may be effected in the manner taught in U.S. Patent l,969,324.
oxidation inhibitors reduce the tendency of mineral oils 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 viscosity growth. Such oxidation inhibitors include alkaline earth metal salts of alkylphenolthioesters having preferably C5 to Cl2 alkyl side chains, calcium nonylphenol sulfide, barium t-octylphenyl sulfide, dioctylphenylamine, phenylalphanaphthylamine, phosphosulfurized or sulfurized hydrocarbons, etc.
WO93/21288 2 1 3 1 0 9 ~ PCT/US93/03381 ;7 Pour polnt depressan~s iower the tempera~ure a~
which the oil will flow or can be poured. Such depressants are well known. Typical o~ those additives which usefully optimize the low temperature fluidity of the oil are C -C
dialkylfumarate/vinyl acetate copolymers, polymethacrylates, and wax napthalene.
Foam control can be provided by an antifoamant of the polysiloxane type, e.g. silicone oil and polydimethyl siloxane.
Another class of additive that can be included in the oil are the dihydrocar~yl dithiophosphate metal salts which are frequently used as anti-wear agents and which also provide antioxidant activity. These compounds may be generally characterized by the formula fR O~ ~
( ~SS ~ M
~R ~ J
wherein R9 and R10 are each independently hydrocaryl groups containing from 3 to about 13 car~on atoms, M is a metal and n is an integer equal to the valence of M. The hydrocarbyl groups in the phosphorodithioate structure include alkyl, ~ cycloalkyl or alkaryl groups which may contain ether or ester linkages and which may also contain su~stituent groups such as halogen or nitro.
2 ~3 1~98 18 __ Illus~ra~ive alkyl groups include lsopropyl, isobutyl, n-butyl, sec-butyl, amyl, n-hexyl, methylisobutyl car~inyl, heptyl, 2-ethylhexyl, diisobutyl, isooctyl, nonyl, behenyl, decyl, dodecyl, tridecyl, etc. Illustrati~e lower alkylphenyl groups include xylyl, cresyl, butylphenyl, amylphenyl, heptyl-phenyl, etc.
Cycloalkyl groups likewise aré useful and these include chiefly cyclohexyl and the lower alkyl-cyclohexyl radicals. Many substituted hydrocarbon groups may also be used, e.g., chloropentyl, dichlorophenyl, and dichlorodecyl.
These compounds are prepared by first forming t~e relevant phosphorodithioic acid and then reacting this product with a suitable metal containing compound.
The phosphorodithioic acids are prepared by the reaction of phosphorus pentasulfide with an alcohol or phenol or mixtures of alcohols, mixtures of phenols or mixtures of alcohols and phenols. The reaction inYolves four moles of the alcohol or phenol per mole of phosphorus pentasulfide, and may be carried out within the temperature range from about 50~C to about 200~C, preferably from about 50~C to about 150~C. Thus the preparation of 0,0-di-n-hexyl phosphorodithioic acid involves the reaction of phosphorus pentasulfide with four moles of n-hexyl alcohol at about lO0 C for about two hours. Hydrogen sulfide is liberated and the residue is the defined acid. The preparation of the metal salt of this acid may be effected by reaction with metal oxide. Simply mixing and heating these two reactants is sufficient to cause WO93/21288 2 1 3 1 0 9 ~ PCT/US93/03381 ~_ 19 the reaction .~ ~ake ~lace and tne resultin~
product is sufficiently pure for t~e purposes of this invention.
The metal salts of dihydrocarbyl phosphorodithioates which are useful in this invention include those salts containing Group I
metals, Group II metals, aluminum, lead, tin, manganese, cobalt, and nic~el. The Group II
metals, tin, iron, cobalt, lead, manganese, nickel and copper are amonq the preferred metals. Zinc and copper are especially useful metals. Examples of metal compounds which may be reacted with the acid include 'ithium oxide, lithium hydroxide, sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, silver oxide, magnesium oxide, magnesium hydroxide, calcium oxide, zinc hydroxide, zinc oxide, copper oxide, strontium hydroxide, cadmium oxide, cadmium hydroxide, barium oxide, iron carbonate, copper hydroxide, lead hydroxide, tin butylate, cobalt hydroxide, nic~el hydroxide, nic~el carbonate and the like.
In some instances, the incorporation of certain ingredients such as small amounts of the metal acetate or acetic acid in conjunction with the metal reactant will facilitate the reaction and result in an improved product. For example, the use of up to about 5% of zinc acetate in combination with the required amount of zinc oxide facilitates the formation of a zinc phosphorodithioate.
~1310~8 ~.o In one oreferred embodiment, the alkyl groups R-and R-0 in the formula above are derived from secondary alcohols such as lsopropyl alcohol, secondary butyl alcohol, 2-pentanol, 4-methyl-2-pentanol, 2-hexanol, 3-hexanol, as well as mixtures thereof.
These compounds are generally incorporated into the lubricating oil formulation in the range of from about 0.01 to about 5% by weight, more preferably from about 0.1 to about 3% by weight. ~he preferred compounds are the zinc dihydrocarbyl dithiophosphites.
Viscoslty modifiers impart high and low temperature operability to the lubricating oil and permit it to remain relatively viscous at elevated temperatures and also exhibit acceptable viscosity or fluidity at low temperatures. Viscosity modifiers are generally high molecular weight polymers, including polyesters, polymethacrylates, polyacrylates and polyolefins. The viscosity modifiers may also be deri~atized to include other properties or functions, such as the addition of dispersancy properties. These oil soluble viscosity modifylnq polymers will generally have number average molecular weights of from 103 to 106, preferably 104 to lo6/ e.g., 20,000 to 250,000, as determined by gel permeation chromotography or osmometry.
Examples of suitable hydrocarbon polymers include homopolymers and copolymers of two or more C2 to C30 olefin monomers, e.g. C2 to C8 olefins, including both alpha olefins and internal olefins, which may be straight or branched, aliphatic, WO93/21288 2131 0 9 8 PC~/US93/03381 aromatic, alkyi-aromatic, cycloaliphatic, etc.
Particularly preferred polymers are polyiso~utylenes, homopolymers and copolymers of C2 and higher alpha olefins, atactic polypropylene, hydrogenated polymers and copolymers and terpolymers of styrene, e.g. with isoprene andJor butadiene and hydrogenated derivatives thereof.
The polymer may be degraded in molecular weight, for example by mastication, extrusion, oxidation or thermal degradation, and may contain oxygen.
These viscosity modifiers are normally added to the oil composition at a level within the range of from about O.l to about 10% by weight.
It may also be desirable to include an additive which serves to stabilize the compatibility of lu~ricant compositions containing relatively high levels of friction modifiers. ~Y~m~les of such additives include hydrocarbyl substituted succinic anhydrides, more preferably polyolefin-substituted succinic anhydride wherein the polyolefin has a number average molecular weight of from about 500 to lO,000, more preferably from about lO00 to 3000.
Preferred polyolefin substituent groups include polyisobutylene, polybutene-l, as well as copolymers of butene-l with ethylene and/or propylene. Polyisobutyenyl succinic anhydride is a preferred compati~ilizer for this purpose. This ingredient may be present in the lubricant composition at a level within the range of about O.l to 5% by weight, and is preferably present at about the same level as the total weight of friction modifier additives.
2 1 3 ~
CompositiOns which contain one or more of these numerous additives are typically blended by physical admixture into the lube oil in amounts - effective to provide their normal attendant function.
The improved lu~rication enhancement offered by compositions within the scope of this invention can be demonstrated using what is referred to as a Sequence VI Dynanometer Fuel Economy test, more specifically described as the ASTM Sequence VI test method RR: D0-2: 1204. This test is run using a 3.8 liter Buic~*V-6 engine equipped with cooling means to maintain a relatively constant engine oil temperature of 150 F or 275 F, coupled to a power absorbing dynanometer such that the engine speed and power output can be tightly controlled.
The lubricant to be evaluated is first flushed into the engine and aged at an oil temperature of 225 deg. F for 32 hours. The engine is then set to a specific speed and power output, and the test is conducted at the temperature for the two test stages of 150 deg. F and 27~ deg. F. The engine is calibrated prior to each candidate run, using industry standard viscosity and friction modified reference oils. At each stage the average brake specific consumption is calculated. After the completion of the measurement stages, the lubricant in the engine is detergent flushed then flushed to an SAE 30 baseline oil and the measurements are repeated. These measurements are then used to calculate the Equivalent Fuel Economy Improvement (EFEI) of the candidate relative to the baseline oil.
*trade-mark WO93/21288 213109~
Data reported here was collec~ed either from the full ASTM sequence vI tesl cycle or a shortened version of the Sequence VI test, referred to as a Sequence VI screener test, in which the test oil is aged for a reduced period of time.
The following Examples further illustrate the invention.
ExamPles 1-3 A base control SAE l0W-30 formulation was prepared by mixing about 94 parts by volume of mineral oil with effective amounts of the following additive ingredients to total l00 parts:
a) - Polybutenyl succinic anhydride polyamine product (borated);
b) - Basic Magnesium petroleum sulfonate;
c) - Zinc salt of methyl isobutyl carbinol phosphorodithioate;
d) - Mixed nonyl phenol sulfides e) - Calcium petroleum sulfonate (neutral) f) - Oil soluble copper antioxidant g) - bis alkaryl amine h) - Deemulsifier i) - Antifoamant j) - Pour Point Depressant k) - Viscosity Modifier Taking this base control formulation, the following friction modifier ingredients were added in the following amounts by volume (V.):
~3~0g~ 24 _~
Example l: Control formulation 1 0.5% v. glycerol oleate esters Example 2: Control formulation t 0.5% V. N,N-bis (2-hydroxyethyl) tallow amine Example 3: Control formulation + 0.25% V. glycerol oleate esters + 0.25% V. N,N-bis (2-hydroxyethyl) tallow amine.
The Control formulation and each of the formulations of Examples 1-3 were subjected to a Sequence VI dynanometer fuel economy screener test.
The recorded EFEI test results are as follows:
EFEI Test Result Control l.17 Example l 2.44 Example 2 3.10 Example 3 3.14 The test results show that each of the glycerol oleate mixtures and N,N-bis (2-hydroxyethyl) tallow amine exhibit enhanced fuel efficiency in the base formulation when added to the control formulation at a 0.5~ by volume concentration, with the N,N-bis (2-hydroxyethyl) tallow amine being somewhat superior.
The EFEI result of 3.14 achieved by combining N,N-bis (2-hydroxyethyl) tallow amine and the glycerol oleate mixture each at 0.25% by ~olume concentration is therefore much higher than expected, and even higher than N,N-~is (2-hydroxyethyl) tallow amine used alone at the O.S% by volume concentration.
ExamDles 4-6 Three additional oil formulations similar to the above were prepared. The main difference was that the additive component (c) in Examples 1-3 was replaced by the zinc salt of miY~ butane-2-ol and isooctanol phospnorodithioate.
Example 4: Control formulation + 0.25% V. N,N-bis (2-hydroxyethyl) tallow amine Example 5: Control formulation + 0.5% V. N,N-bis (2-hydroxyethyl) tallow amine.
Exmaple 6: Control formulation + 0.25% V. glycerol oleate mixtures + 0.25% V. N,N-~is (2-hydroxyethyl) tallow amine.
Each formulation was subjected to a Standard Sequence dynanometer test and the recorded EFEI
results were as follows:
2~3~098 Example 4 l.94 Example 5 2.48 Example 6 2.67 These results once again demonstrate the EFEI test results based the combination of N,N-bis (2-hydroxyethyl) tallow amine and the glycerol oleate mixtures each present at a 0.25% by volume concentration are superior to results achieved using N,N-bis (2-hydroxyethyl) tallow amine alone at 0.2S% by volume and O.S% by volume concentrations respectively.
Claims (22)
1. A lubricating oil composition comprising a major amount of an oil of lubricating viscosity having blended therewith:
i) from about 0.01 to about 1.0% by weight of an alkoxylated amine having the formula:
wherein R1 is a branched or straight chain hydrocarbyl group containing from about 8 to about 30 carbon atoms, R2 and R3 are independently the same or different branched or straight chain alkylene radicals containing 1 to 5 carbon atoms, R4, R5 and R6 are independently the same or different alkylene radicals containing from 2 to 4 carbon atoms, X is oxygen or sulfur, p is 0 or an integer ranging from 1 to 20, t is independently 0 or 1, and a, b and c are independently integers ranging from 1 to 4; and ii) from about 0.1 to about 1.0% by weight of at least one ester of a fatty acid having the formula:
wherein R7 represents an alkylene or alkenylene hydrocarbyl radical having from 10 to 18 carbon atoms, R8 is the residuum of a polyhydric alcohol containing from 2 to 5 carbon atoms and from 2 to 4 hydroxyl groups, e is 0 or 1 and d is an integer of 1, 2 or 3.
i) from about 0.01 to about 1.0% by weight of an alkoxylated amine having the formula:
wherein R1 is a branched or straight chain hydrocarbyl group containing from about 8 to about 30 carbon atoms, R2 and R3 are independently the same or different branched or straight chain alkylene radicals containing 1 to 5 carbon atoms, R4, R5 and R6 are independently the same or different alkylene radicals containing from 2 to 4 carbon atoms, X is oxygen or sulfur, p is 0 or an integer ranging from 1 to 20, t is independently 0 or 1, and a, b and c are independently integers ranging from 1 to 4; and ii) from about 0.1 to about 1.0% by weight of at least one ester of a fatty acid having the formula:
wherein R7 represents an alkylene or alkenylene hydrocarbyl radical having from 10 to 18 carbon atoms, R8 is the residuum of a polyhydric alcohol containing from 2 to 5 carbon atoms and from 2 to 4 hydroxyl groups, e is 0 or 1 and d is an integer of 1, 2 or 3.
2. The composition of claim 1 wherein said amine has the formula:
3. The composition of claim 1 wherein contains from 12 to 24 carbon atoms,
4. The composition of claim 3 wherein R1 is tallow group.
5. The composition of claim 1 wherein each of R4, R5 and R6 contain 2 carbon atoms.
6. The composition of claim 2 wherein said amine is N,N-bis(2-hydxoxyethyl) tallowamine.
7. The composition of claim 2 wherein R8 is the residuum of glycerol.
8. The composition of claim 7 wherein R7 contains 14 to 16 carbon atoms.
9. The composition of claim 8 wherein (e) is 0.
10. The composition of claim 1 wherein said ester is selected from the group consisting of glycerol monooleate, glycerol dioleate and mixtures thereof.
11. The composition of claim 10 wherein said ester is a mixture of glycerol monooleate and glycerol dioleate.
12. The composition of claim 1 wherein said amine comprises N, N-bis (2-hydroxyethyl) tallowamine and said ester comprises glycerol monooleate.
13. The composition of claim 1 wherein said amine is present in said oil at a level of from about 0.2 to about 0.5% by weight.
14. The composition of claim 13 wherein said ester is present in said oil at a level of from about 0.2 to about 0.5% by weight.
15. The composition of claim 1 which further contains an effective amount of at least one additive selected from the group consisting of dispersants, detergents, oxidation inhibitors, viscosity modifiers, corrosion inhibitors, anti-wear agents and anti-foam agents.
16. The composition of claim 15 wherein said additive includes a zinc dihydrocarbyldithio-phosphite anti-wear agent.
17. The composition of claim 15 wherein said additive includes nonyl phenol sulfide antioxidant.
18. The composition of claim 15 wherein said additive includes a magnesium or calcium sulfonate detergent.
19. The composition of claim 15 wherein said additive includes the reaction product of a polyolefin-substituted succinic anhydride and an alkylene polyamine, or a boronated derivative thereof, as a dispersant.
20. A process for enhancing the friction properties of lubricating oil compositions comprising admixing therewith:
i) from about 0.01 to about 1.0% by weight of an alkoxylated amine having the formula:
wherein R1 is a branched or straight chain hydrocarbyl group containing from about 8 to about 30 carbon atoms, R2 and R3 are independently the same or different branched or straight chain alkylene radicals containing 1 to 6 carbon atoms, R4, R5 and R6 are independently the same or different alkylene radicals containing from 2 to 4 carbon atoms, X is oxygen or sulfur, p is 0 or an integer ranging from 1 to 20, t is independently 0 or 1, and a, b and c are independently integers ranging from 1 to 4; and ii) from about 0.1 to about 1.0% by weight of at least one ester of a fatty acid having the formula:
wherein R7 represents an alkylene or alkenylene hydrocarbyl radical having from 10 to 18 carbon atoms, R8 is the residuum of a polyhydric alcohol containing from 2 to 5 carbon atoms and from 2 to 4 hydroxyl groups, e is 0 or 1 and d is an integer of 1, 2 or 3.
i) from about 0.01 to about 1.0% by weight of an alkoxylated amine having the formula:
wherein R1 is a branched or straight chain hydrocarbyl group containing from about 8 to about 30 carbon atoms, R2 and R3 are independently the same or different branched or straight chain alkylene radicals containing 1 to 6 carbon atoms, R4, R5 and R6 are independently the same or different alkylene radicals containing from 2 to 4 carbon atoms, X is oxygen or sulfur, p is 0 or an integer ranging from 1 to 20, t is independently 0 or 1, and a, b and c are independently integers ranging from 1 to 4; and ii) from about 0.1 to about 1.0% by weight of at least one ester of a fatty acid having the formula:
wherein R7 represents an alkylene or alkenylene hydrocarbyl radical having from 10 to 18 carbon atoms, R8 is the residuum of a polyhydric alcohol containing from 2 to 5 carbon atoms and from 2 to 4 hydroxyl groups, e is 0 or 1 and d is an integer of 1, 2 or 3.
21. The process of claim 20 wherein said amine has the formula:
22. The process of claim 21 wherein said at least one ester of a fatty acid comprises a mixture of glycerol monooleate and glycerol dioleate.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86892792A | 1992-04-15 | 1992-04-15 | |
US868,927 | 1992-04-15 | ||
PCT/US1993/003381 WO1993021288A1 (en) | 1992-04-15 | 1993-04-09 | Lubricant composition containing mixed friction modifiers |
Publications (2)
Publication Number | Publication Date |
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CA2131098A1 CA2131098A1 (en) | 1993-10-16 |
CA2131098C true CA2131098C (en) | 1999-07-06 |
Family
ID=25352586
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CA002131098A Expired - Fee Related CA2131098C (en) | 1992-04-15 | 1993-04-09 | Lubricant composition containing mixed friction modifiers |
Country Status (6)
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---|---|
EP (1) | EP0649459A1 (en) |
JP (1) | JPH07508771A (en) |
AU (1) | AU4048793A (en) |
CA (1) | CA2131098C (en) |
MX (1) | MX9302129A (en) |
WO (1) | WO1993021288A1 (en) |
Families Citing this family (27)
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US5286394A (en) * | 1989-06-27 | 1994-02-15 | Ethyl Corporation | Fuel economy and oxidation inhibition in lubricant compositions for internal combustion engines |
CA2305396C (en) * | 1997-10-03 | 2006-07-18 | Exxon Chemical Patents, Inc. | Lubricating compositions |
US7195654B2 (en) * | 2001-03-29 | 2007-03-27 | The Lubrizol Corporation | Gasoline additive concentrate composition and fuel composition and method thereof |
US6803350B2 (en) * | 2002-05-22 | 2004-10-12 | Chevron Oronite Company Llc | Lubricating compositions for friction material interfaces |
US6969198B2 (en) * | 2002-11-06 | 2005-11-29 | Nissan Motor Co., Ltd. | Low-friction sliding mechanism |
JP2004210984A (en) | 2003-01-06 | 2004-07-29 | Chevron Texaco Japan Ltd | Fuel oil composition and fuel additive |
JP2005008851A (en) * | 2003-05-29 | 2005-01-13 | Nissan Motor Co Ltd | Cutting oil for cutting tool coated with hard carbon thin film, and cutting tool coated with hard carbon thin film |
US7771821B2 (en) * | 2003-08-21 | 2010-08-10 | Nissan Motor Co., Ltd. | Low-friction sliding member and low-friction sliding mechanism using same |
JP4511154B2 (en) * | 2003-11-11 | 2010-07-28 | 新日本石油株式会社 | Lubricating oil composition for engine oil |
JP2009126868A (en) * | 2007-11-19 | 2009-06-11 | Adeka Corp | Lubricant-additive composition and lubricant composition containing the same |
US9029304B2 (en) * | 2008-09-30 | 2015-05-12 | Chevron Oronite Company Llc | Lubricating oil additive composition and method of making the same |
UA109139C2 (en) | 2010-06-25 | 2015-07-27 | APPLICATIONS AND COMPOSITIONS | |
FR2964115B1 (en) | 2010-08-27 | 2013-09-27 | Total Raffinage Marketing | ENGINE LUBRICANT |
US9127232B2 (en) | 2010-10-26 | 2015-09-08 | Castrol Limited | Non-aqueous lubricant and fuel compositions comprising fatty acid esters of hydroxy-carboxylic acids, and uses thereof |
JP5840222B2 (en) * | 2010-11-24 | 2016-01-06 | シェブロン・オロナイト・カンパニー・エルエルシー | Lubricating composition containing a friction modifier blend |
FR2974111B1 (en) * | 2011-04-14 | 2013-05-10 | Total Raffinage Marketing | LUBRICANT CYLINDER FOR MARINE ENGINE TWO TIMES |
WO2012168151A1 (en) | 2011-06-09 | 2012-12-13 | Castrol Limited | Compositions, methods and uses |
JP5828756B2 (en) * | 2011-12-27 | 2015-12-09 | 昭和シェル石油株式会社 | Automotive engine oil |
PL2864457T3 (en) | 2012-06-20 | 2018-01-31 | Castrol Ltd | Friction modifier and their use in lubricants and fuels |
WO2013189674A1 (en) | 2012-06-20 | 2013-12-27 | Castrol Limited | Friction modifier and their use in lubricants and fuels |
EP2735604A1 (en) | 2012-11-22 | 2014-05-28 | Castrol Limited | Method of preparing a lubricant composition |
WO2014136906A1 (en) * | 2013-03-06 | 2014-09-12 | Jx日鉱日石エネルギー株式会社 | Friction modifier and lubricating-oil composition |
GB201502002D0 (en) | 2015-02-06 | 2015-03-25 | Castrol Ltd | Uses and compositions |
GB201501991D0 (en) | 2015-02-06 | 2015-03-25 | Castrol Ltd | Uses and compositions |
JP6780826B2 (en) * | 2017-03-16 | 2020-11-04 | 出光興産株式会社 | Lubricating oil composition and friction reduction method for internal combustion engine |
GB201718527D0 (en) * | 2017-11-09 | 2017-12-27 | Croda Int Plc | Lubricant formulation & friction modifier additive |
GB201914191D0 (en) | 2019-10-02 | 2019-11-13 | Castrol Ltd | Non-metallic phosphorus antiwear additives |
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US3796662A (en) * | 1972-02-17 | 1974-03-12 | Chevron Res | Extended life functional fluid |
US3933659A (en) * | 1974-07-11 | 1976-01-20 | Chevron Research Company | Extended life functional fluid |
US4010107A (en) * | 1976-02-02 | 1977-03-01 | Chevron Research Company | Corrosion-inhibiting functional fluid |
EP0314843A1 (en) * | 1987-11-03 | 1989-05-10 | Union Oil Company Of California | Additives for lubricating oils, and lubricating oils containing such additives |
US5078893A (en) * | 1988-06-24 | 1992-01-07 | Exxon Chemical Patents Inc. | Synergistic combination of additives useful in power transmitting compositions |
EP0553100B1 (en) * | 1990-07-31 | 1996-01-24 | Exxon Chemical Patents Inc. | Synergystic blend of amine/amide and ester/alcohol friction modifying agents for improved fuel economy of an internal combustion engine |
-
1993
- 1993-04-09 AU AU40487/93A patent/AU4048793A/en not_active Abandoned
- 1993-04-09 CA CA002131098A patent/CA2131098C/en not_active Expired - Fee Related
- 1993-04-09 EP EP93911622A patent/EP0649459A1/en not_active Withdrawn
- 1993-04-09 JP JP5518519A patent/JPH07508771A/en active Pending
- 1993-04-09 WO PCT/US1993/003381 patent/WO1993021288A1/en not_active Application Discontinuation
- 1993-04-13 MX MX9302129A patent/MX9302129A/en unknown
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AU4048793A (en) | 1993-11-18 |
WO1993021288A1 (en) | 1993-10-28 |
EP0649459A1 (en) | 1995-04-26 |
MX9302129A (en) | 1994-06-30 |
CA2131098A1 (en) | 1993-10-16 |
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