CN117098831A - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
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- CN117098831A CN117098831A CN202280025477.8A CN202280025477A CN117098831A CN 117098831 A CN117098831 A CN 117098831A CN 202280025477 A CN202280025477 A CN 202280025477A CN 117098831 A CN117098831 A CN 117098831A
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- CN
- China
- Prior art keywords
- lubricating oil
- oil composition
- molybdenum
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- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000203 mixture Substances 0.000 title claims abstract description 96
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 95
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 52
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 47
- 229920000642 polymer Polymers 0.000 claims abstract description 46
- 239000011733 molybdenum Substances 0.000 claims abstract description 44
- 239000002199 base oil Substances 0.000 claims abstract description 33
- 239000003607 modifier Substances 0.000 claims abstract description 33
- 239000002480 mineral oil Substances 0.000 claims abstract description 27
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 25
- 230000001050 lubricating effect Effects 0.000 claims abstract description 12
- -1 molybdenum amine Chemical class 0.000 claims description 77
- KHYKFSXXGRUKRE-UHFFFAOYSA-J molybdenum(4+) tetracarbamodithioate Chemical compound C(N)([S-])=S.[Mo+4].C(N)([S-])=S.C(N)([S-])=S.C(N)([S-])=S KHYKFSXXGRUKRE-UHFFFAOYSA-J 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 8
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 230000001603 reducing effect Effects 0.000 abstract description 26
- 239000003921 oil Substances 0.000 abstract description 21
- 230000003746 surface roughness Effects 0.000 abstract description 7
- 125000004432 carbon atom Chemical group C* 0.000 description 46
- 229910052751 metal Inorganic materials 0.000 description 36
- 239000002184 metal Substances 0.000 description 36
- 150000001875 compounds Chemical class 0.000 description 27
- 239000003446 ligand Substances 0.000 description 26
- 125000001424 substituent group Chemical group 0.000 description 23
- 125000000217 alkyl group Chemical group 0.000 description 18
- 239000003599 detergent Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 15
- 150000002430 hydrocarbons Chemical group 0.000 description 15
- 125000001931 aliphatic group Chemical group 0.000 description 14
- 150000001336 alkenes Chemical class 0.000 description 13
- 125000000129 anionic group Chemical group 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 13
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 12
- 238000009826 distribution Methods 0.000 description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 11
- 125000003342 alkenyl group Chemical group 0.000 description 11
- 239000003963 antioxidant agent Substances 0.000 description 11
- 229910052749 magnesium Inorganic materials 0.000 description 11
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 10
- 125000000962 organic group Chemical group 0.000 description 10
- 229910052717 sulfur Inorganic materials 0.000 description 10
- 125000004429 atom Chemical group 0.000 description 9
- 229910052791 calcium Inorganic materials 0.000 description 9
- 239000011575 calcium Substances 0.000 description 9
- 150000001450 anions Chemical class 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 8
- 239000000194 fatty acid Substances 0.000 description 8
- 229930195729 fatty acid Natural products 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 125000000913 palmityl 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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- 125000004079 stearyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- 125000004434 sulfur atom Chemical group 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 150000001342 alkaline earth metals Chemical class 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 239000002585 base Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- 125000004430 oxygen atom Chemical group O* 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 125000004437 phosphorous atom Chemical group 0.000 description 5
- 229920000193 polymethacrylate Polymers 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 4
- 125000002511 behenyl 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])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 4
- 239000010779 crude oil Substances 0.000 description 4
- 125000000753 cycloalkyl group Chemical group 0.000 description 4
- 230000001747 exhibiting effect Effects 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 125000002960 margaryl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 4
- 229920001083 polybutene Polymers 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 150000003973 alkyl amines Chemical class 0.000 description 3
- 125000002877 alkyl aryl group Chemical group 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 125000003710 aryl alkyl group Chemical group 0.000 description 3
- 150000001721 carbon Chemical group 0.000 description 3
- 125000005265 dialkylamine group Chemical group 0.000 description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 3
- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 3
- 125000003438 dodecyl group Chemical group [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])* 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000005078 molybdenum compound Substances 0.000 description 3
- 150000002752 molybdenum compounds Chemical class 0.000 description 3
- 125000001421 myristyl 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])C([H])([H])[H] 0.000 description 3
- 125000002958 pentadecyl 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])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- PTISTKLWEJDJID-UHFFFAOYSA-N sulfanylidenemolybdenum Chemical class [Mo]=S PTISTKLWEJDJID-UHFFFAOYSA-N 0.000 description 3
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 3
- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 3
- 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 3
- 239000003981 vehicle Substances 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- ADOBXTDBFNCOBN-UHFFFAOYSA-N 1-heptadecene Chemical compound CCCCCCCCCCCCCCCC=C ADOBXTDBFNCOBN-UHFFFAOYSA-N 0.000 description 2
- GQEZCXVZFLOKMC-UHFFFAOYSA-N 1-hexadecene Chemical compound CCCCCCCCCCCCCCC=C GQEZCXVZFLOKMC-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- PJLHTVIBELQURV-UHFFFAOYSA-N 1-pentadecene Chemical compound CCCCCCCCCCCCCC=C PJLHTVIBELQURV-UHFFFAOYSA-N 0.000 description 2
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical compound CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 2
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 2
- BITAPBDLHJQAID-KTKRTIGZSA-N 2-[2-hydroxyethyl-[(z)-octadec-9-enyl]amino]ethanol Chemical compound CCCCCCCC\C=C/CCCCCCCCN(CCO)CCO BITAPBDLHJQAID-KTKRTIGZSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 125000001204 arachidyl 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])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 2
- IAQRGUVFOMOMEM-UHFFFAOYSA-N but-2-ene Chemical compound CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 2
- 238000004517 catalytic hydrocracking Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 125000003493 decenyl group Chemical group [H]C([*])=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])[H] 0.000 description 2
- 125000002704 decyl group Chemical group [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])* 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 150000002019 disulfides Chemical class 0.000 description 2
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 125000000755 henicosyl 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])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 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000006038 hexenyl group Chemical group 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 125000002463 lignoceryl 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])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 2
- 238000005461 lubrication Methods 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 150000002763 monocarboxylic acids Chemical class 0.000 description 2
- VAMFXQBUQXONLZ-UHFFFAOYSA-N n-alpha-eicosene Natural products CCCCCCCCCCCCCCCCCCC=C VAMFXQBUQXONLZ-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- NHLUYCJZUXOUBX-UHFFFAOYSA-N nonadec-1-ene Chemical compound CCCCCCCCCCCCCCCCCC=C NHLUYCJZUXOUBX-UHFFFAOYSA-N 0.000 description 2
- 125000001196 nonadecyl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000005187 nonenyl group Chemical group C(=CCCCCCCC)* 0.000 description 2
- 125000001400 nonyl 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])[H] 0.000 description 2
- CCCMONHAUSKTEQ-UHFFFAOYSA-N octadec-1-ene Chemical compound CCCCCCCCCCCCCCCCC=C CCCMONHAUSKTEQ-UHFFFAOYSA-N 0.000 description 2
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 2
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- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 150000003558 thiocarbamic acid derivatives Chemical class 0.000 description 1
- 150000003567 thiocyanates Chemical class 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000002469 tricosyl 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])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
- 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
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M161/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- C10M2227/066—Organic compounds derived from inorganic acids or metal salts derived from Mo or W
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/12—Groups 6 or 16
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/04—Molecular weight; Molecular weight distribution
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Provided is a lubricating oil composition which has excellent friction coefficient reducing effect even when lubricating a member having a small surface roughness in a low oil temperature region, and which comprises a mineral oil base oil (A), a polymer (B) having a weight average molecular weight (Mw) of 100-15000, and a molybdenum-based friction modifier (M), and which has a kinematic viscosity at 40 ℃ of 35.0mm 2 And/s or less.
Description
Technical Field
The present invention relates to lubricating oil compositions.
Background
In recent years, from the effective utilization of petroleum resources and CO 2 From the standpoint of emission reduction, there is a strong demand for fuel saving in vehicles such as automobiles. Therefore, even for a lubricating oil composition for an engine of a vehicle such as an automobile, the following is trueThe demand for fuel saving increases.
One of the methods for reducing fuel consumption is to reduce the viscosity resistance by reducing the viscosity of the lubricating oil composition, but the reduction in viscosity is simply performed, which adversely affects the friction characteristics.
In addition, in an automobile equipped with a hybrid mechanism or an idle reduction mechanism, the engine operation rate is low and the oil temperature is difficult to increase, so that the low viscosity in the low oil temperature region is more important, and a low viscosity mineral oil or a synthetic oil may be used as a base oil. In this case, a molybdenum-based friction modifier may be used for the purpose of reducing the friction coefficient (for example, refer to patent document 1).
On the other hand, in recent years, a technique for reducing the surface roughness of engine components such as pistons, cylinder liners, and the like has been developed.
Prior art literature
Patent literature
Patent document 1 Japanese patent application laid-open No. 2019-189668
Disclosure of Invention
Problems to be solved by the invention
However, as a result of the studies by the present inventors, it was found that when lubricating a member having a small surface roughness in a low oil temperature region, the friction coefficient was deteriorated.
The present invention has been made in view of the above-described problems, and an object thereof is to provide a lubricating oil composition having an excellent effect of reducing the friction coefficient even when lubricating a member having a small surface roughness in a low oil temperature range.
Means for solving the problems
The present inventors have made an effort to study and as a result found that: the present invention has been accomplished by solving the above-mentioned problems by using a low-viscosity lubricating oil composition obtained by blending a polymer having a specific weight average molecular weight with a molybdenum-based friction modifier.
Namely, the present invention provides the following [1].
[1]Lubricating oil composition comprising mineral oil base oil (A), polymer (B) having weight average molecular weight (Mw) of 100-15000, and molybdenum-based friction modifierA segment agent (M) having a kinematic viscosity of 35.0mm at 40 DEG C 2 And/s or less.
Effects of the invention
According to the present invention, a lubricating oil composition excellent in the effect of reducing the friction coefficient can be provided even when lubricating a member having a small surface roughness in a low oil temperature region.
Detailed Description
The upper limit and the lower limit of the numerical range described in the present specification can be arbitrarily combined. For example, when "A to B" and "C to D" are described as numerical ranges, the numerical ranges of "A to D" and "C to B" are also included in the scope of the present invention.
The numerical ranges "lower limit value to upper limit value" described in the present specification mean, unless otherwise stated, not lower limit value but lower limit value.
In addition, in this specification, the numerical values of the examples are numerical values that can be used as the upper limit value or the lower limit value.
In this specification, for example, "(meth) acrylate" is used as a term indicating both "acrylate" and "methacrylate", and the same is true for other similar terms and the same symbols.
[ lubricating oil composition ]
The lubricating oil composition of the present embodiment comprises a mineral oil base oil (A), a polymer (B) having a weight average molecular weight (Mw) of 100 to 15000, and a molybdenum-based friction modifier (M), and has a kinematic viscosity at 40 ℃ of 35.0mm 2 And/s or less.
As a result of diligent studies to solve the above problems, the inventors of the present invention have found that when lubricating a member having a small surface roughness in a low oil temperature region, it is difficult to form a film formed of a molybdenum-based friction modifier in a boundary lubrication region, and the friction coefficient is deteriorated.
Accordingly, the present inventors have made an intensive study and as a result, have found that by compounding a polymer having a small molecular weight, the coefficient of friction between metal members in a low oil temperature region can be reduced, and have completed the present invention.
The components contained in the lubricating oil composition according to the present embodiment will be described below.
Mineral oil base oil (A) >, and process for producing the same
The lubricating oil composition of the present embodiment contains a mineral oil base oil (a). As the mineral oil base oil (a), one or more mineral oils selected from the group consisting of those conventionally used as base oils for lubricating oils can be used without particular limitation.
Examples of the mineral oil include atmospheric residuum obtained by atmospheric distillation of crude oil such as paraffin-based crude oil, intermediate crude oil, and naphthenic crude oil; a lubricating oil fraction obtained by subjecting these atmospheric residues to reduced pressure distillation; mineral oil obtained by subjecting the lubricating oil fraction to at least 1 refining treatment selected from solvent deasphalting, solvent extraction, hydrogenation, hydrocracking, highly hydrocracking, solvent dewaxing, catalytic dewaxing, hydroisomerization dewaxing, and the like.
The mineral oil base oil (a) used in the present embodiment is preferably a base oil of group II or III classified as a base oil class of API (american petroleum institute), and more preferably a base oil classified as group III.
As the mineral oil base oil (a), one selected from mineral oils may be used alone, or two or more may be used in combination.
The kinematic viscosity and viscosity index of the mineral oil base oil (a) are preferably in the following ranges from the viewpoint of improving fuel economy, and from the viewpoint of reducing the loss of the lubricating oil composition due to evaporation and securing oil film retention.
The aforementioned mineral oil base oil (A) preferably has a kinematic viscosity at 40℃of 4.0mm 2 At least/s, more preferably 8.0mm 2 At least/s, more preferably 12.0mm 2 At least/s, preferably 50.0mm 2 Preferably less than/s, more preferably 35.0mm 2 And is not more than/s, more preferably 24.0mm 2 And/s or less. The upper and lower limits of these numerical ranges can be arbitrarily combined, and specifically, are preferably 4.0mm 2 /s～50.0mm 2 S, more preferably 8.0mm 2 /s～35.0mm 2 /s，Further preferably 12.0mm 2 /s～24.0mm 2 /s。
The aforementioned mineral oil base oil (A) preferably has a kinematic viscosity at 100℃of 2.0mm 2 At least/s, preferably 20.0mm 2 Preferably less than/s, more preferably 10.0mm 2 And/s is less than or equal to, more preferably 8.0mm 2 And/s or less, more preferably 7.0mm 2 And/s. The upper and lower limits of these numerical ranges can be arbitrarily combined, and specifically, are preferably 2.0mm 2 /s～20.0mm 2 S, more preferably 2.0mm 2 /s～10.0mm 2 S, more preferably 2.0mm 2 /s～8.0mm 2 S, more preferably 2.0mm 2 /s～7.0mm 2 /s。
The viscosity index of the base oil (a) is preferably 80 or more, more preferably 90 or more, further preferably 100 or more, further preferably 105 or more, further preferably 120 or more.
The above 40 ℃ kinematic viscosity, the above 100 ℃ kinematic viscosity, and the above viscosity index can be according to JIS K2283: 2000, measurement or calculation was performed.
In the case where the mineral oil base oil (a) is a mixed base oil containing two or more mineral oil base oils, the kinematic viscosity and viscosity index of the mixed base oil are preferably within the above ranges.
In the lubricating oil composition of the present embodiment, the content of the mineral oil base oil (a) is not particularly limited, but is preferably 60 to 99 mass%, more preferably 70 to 95 mass%, and even more preferably 80 to 93 mass%, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of more easily volatilizing the effects of the present invention.
< Polymer (B) >)
The polymer (B) used in the lubricating oil composition of the present embodiment is desirably a polymer having a weight average molecular weight (Mw) of 100 to 15000. If the weight average molecular weight (Mw) of the polymer is less than 100, the oil film reinforcing effect cannot be found, whereas if it exceeds 15000, the polymer does not enter the sliding surface, and therefore the friction coefficient reducing effect is not exhibited in any case. The weight average molecular weight (Mw) of the polymer (B) is preferably 500 or more, more preferably 800 or more, further preferably 1000 or more, and further preferably 13000 or less, more preferably 12000 or less, further preferably 11000 or less, particularly preferably 3500 or less. The upper limit and the lower limit of these numerical ranges can be arbitrarily combined, and specifically, are preferably 500 to 13000, more preferably 800 to 12000, still more preferably 1000 to 11000, and particularly preferably 1000 to 3500.
The number average molecular weight (Mn) of the polymer (B) is preferably 100 or more, more preferably 500 or more, further preferably 700 or more, particularly preferably 800 or more, and further preferably 10000 or less, more preferably 5000 or less, further preferably 3000 or less, particularly preferably 1700 or less. The upper limit and the lower limit of these numerical ranges can be arbitrarily combined, and specifically, are preferably 100 to 10000, more preferably 500 to 5000, further preferably 700 to 3000, particularly preferably 800 to 1700.
The molecular weight distribution (Mw/Mn) of the polymer (B) is preferably 3.0 or less, more preferably 2.5 or less, and further preferably 2.0 or less.
In the present specification, the weight average molecular weight (Mw) and the number average molecular weight (Mn) of each component are values in terms of standard polystyrene measured by Gel Permeation Chromatography (GPC).
Examples of the polymer (B) include polyolefin, ethylene-vinyl acetate copolymer, condensate of chlorinated paraffin and naphthalene, condensate of chlorinated paraffin and phenol, poly (meth) acrylate, and polyalkylstyrene.
As the polymer (B), polyolefin (B-1) and poly (meth) acrylate (B-2) are preferably used.
The polyolefin (B-1) is preferably a polymer of an olefin having 2 or more carbon atoms, more specifically an ethylene-propylene copolymer or a polymer of an olefin having 4 or more carbon atoms, and further preferably a polymer of an olefin having 20 or less carbon atoms, more preferably a polymer of an olefin having 12 or less carbon atoms. The upper limit and the lower limit of these numerical ranges can be arbitrarily combined, and the polymer of the olefin having 4 or more carbon atoms is preferably a polymer of an olefin having 4 to 20 carbon atoms, more preferably a polymer of an olefin having 4 to 12 carbon atoms.
Specific examples of the olefins include ethylene, propylene, 1-butene, 2-butene, isobutylene, 3-methyl-1-butene, 4-phenyl-1-butene, 1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 3-dimethyl-1-pentene, 3, 4-dimethyl-1-pentene, 4-dimethyl-1-pentene, 1-hexene, 4-methyl-1-hexene, 5-methyl-1-hexene, 6-phenyl-1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-nonadecene, 1-eicosene, and the like. Among them, 1-butene and 1-decene are preferable.
The polyolefin (B-1) may be a hydrogenated product.
The content of the polymer (B) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and further preferably 5.0% by mass or less, more preferably 4.0% by mass or less, still more preferably 3.0% by mass or less, in terms of the solid content based on the total amount of the composition. The upper limit and the lower limit of these numerical ranges can be arbitrarily combined, and specifically, are preferably 0.1 to 5.0 mass%, more preferably 0.2 to 4.0 mass%, and still more preferably 0.3 to 3.0 mass%.
[ molybdenum-based friction modifier (M) ]
The lubricating oil composition of the present embodiment further contains a molybdenum-based friction modifier (M). When the lubricating oil composition does not contain the molybdenum-based friction modifier (M), the friction reducing effect becomes insufficient.
The molybdenum-based friction modifier (M) may be any compound having a molybdenum atom.
When the molybdenum-based friction modifier (M) is exemplified, molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and molybdenum amine complex are exemplified. One kind of them may be used alone, or two or more kinds may be used in combination.
Among them, one or more selected from molybdenum dithiocarbamate (MoDTC) and molybdenum amine complexes are preferable from the viewpoint of obtaining excellent fuel economy by reducing the coefficient of friction between metals.
As molybdenum dithiocarbamates (MoDTC), for example, molybdenum dithiocarbamates containing a dinuclear of 2 molybdenum atoms in one molecule, molybdenum dithiocarbamates containing a trinuclear of 3 molybdenum atoms in one molecule, and the like are cited.
That is, in the present embodiment, the molybdenum-based friction modifier (M) preferably contains one or more selected from the group consisting of a dinuclear molybdenum dithiocarbamate, a trinuclear molybdenum dithiocarbamate, and a molybdenum amine complex, and more preferably contains two or more.
Hereinafter, these molybdenum-based friction modifiers will be described in detail.
< dinuclear molybdenum dithiocarbamate >
Examples of the dinuclear molybdenum dithiocarbamate include a compound represented by the following general formula (1) and a compound represented by the following general formula (2).
[ chemical 1]
In the above general formulae (1) and (2), R 11 ～R 14 Each independently represents a hydrocarbon group, and they may be the same or different from each other.
X 11 ～X 18 Each independently represents an oxygen atom or a sulfur atom, and may be the same or different from each other. Wherein X in formula (1) 11 ～X 18 At least two of which are sulfur atoms.
Can be selected as R 11 ～R 14 The number of carbon atoms of the hydrocarbon group is preferably 6 to 22.
As R in the above general formulae (1) and (2) 11 ～R 14 Examples of the hydrocarbon group include an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkylaryl group, and an arylalkyl group.
Examples of the alkyl group include hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, and octadecyl.
Examples of the alkenyl group include hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl and the like.
Examples of the cycloalkyl group include a cyclohexyl group, a dimethylcyclohexyl group, an ethylcyclohexyl group, a methylcyclohexylmethyl group, a cyclohexylethyl group, a propylcyclohexyl group, a butylcyclohexyl group, and a heptylcyclohexyl group.
Examples of the aryl group include phenyl, naphthyl, anthracenyl, biphenyl, and terphenyl.
Examples of the alkylaryl group include tolyl, dimethylphenyl, butylphenyl, nonylphenyl, dimethylnaphthyl and the like.
Examples of the arylalkyl group include a methylbenzyl group, a phenylmethyl group, a phenylethyl group, and a diphenylmethyl group.
Among them, molybdenum dialkyldithiocarbamate (M1) (hereinafter also referred to as "compound (M1)") represented by the following general formula (M1) is preferable.
[ chemical 2]
In the above general formula (m 1), R 1 、R 2 、R 3 And R 4 Each independently represents a short chain substituent group (. Alpha.) as an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a long chain substituent group (. Beta.) as an aliphatic hydrocarbon group having 13 to 22 carbon atoms. Wherein the molar ratio [ (alpha)/(beta) of the short chain substituent group (alpha) to the long chain substituent group (beta) in the whole molecule of the aforementioned compound (M1)]0.10 to 2.0. In the general formula (m 1), X is 1 、X 2 、X 3 And X 4 Each independently represents an oxygen atom or a sulfur atom.
Examples of the aliphatic hydrocarbon group having 4 to 12 carbon atoms which may be selected as the short chain substituent group (. Alpha.) include an alkyl group having 4 to 12 carbon atoms and an alkenyl group having 4 to 12 carbon atoms.
Specifically, for example, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl are cited. These may be linear or branched.
The number of carbon atoms of the aliphatic hydrocarbon group which may be selected as the short chain substituent group (α) is preferably 5 to 11, more preferably 6 to 10, and even more preferably 7 to 9, from the viewpoint of more easily exhibiting the effect of the present invention.
Examples of the aliphatic hydrocarbon group having 13 to 22 carbon atoms which may be used as the long chain substituent group (. Beta.) include an alkyl group having 13 to 22 carbon atoms and an alkenyl group having 13 to 22 carbon atoms.
Specifically, for example, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, oleyl, nonadecenyl, eicosenyl, heneicosenyl, and docosyl are cited. These may be linear or branched.
The number of carbon atoms of the aliphatic hydrocarbon group which may be selected as the long-chain substituent group (. Beta.) is preferably 13 to 20, more preferably 13 to 16, and even more preferably 13 to 14, from the viewpoint of more easily exhibiting the effect of the present invention.
Here, the molar ratio [ (α)/(β) ] of the short chain substituent group (α) to the long chain substituent group (β) in the whole molecule of the compound (M1) represented by the above general formula (M1) is 0.10 to 2.0. When the molar ratio [ (α)/(β) ] is 0.10 or more, the influence on the copper corrosion resistance by the compound (M1) becomes small, and the friction reducing effect is also easily improved. In addition, when the molar ratio [ (α)/(β) ] is 2.0 or less, it is easy to secure low-temperature storage stability.
Here, the molar ratio [ (α)/(β) ] is preferably 0.15 or more, more preferably 0.20 or more, from the viewpoint of further reducing the influence on the copper corrosion resistance and making the friction reducing action more likely to be improved.
In addition, the molar ratio [ (α)/(β) ] is preferably 1.2 or less, more preferably 1.0 or less, further preferably 0.80 or less, further preferably 0.60 or less, from the viewpoint of ensuring low-temperature storage stability more easily.
The upper and lower values of these numerical ranges can be arbitrarily combined. Specifically, it is preferably 0.15 to 1.2, more preferably 0.20 to 1.0, still more preferably 0.20 to 0.80, still more preferably 0.20 to 0.60.
Here, the short-chain substituent group (α) and the long-chain substituent group (β) may or may not coexist in the same molecule. That is, the average value of the molar ratio [ (α)/(β) ] of the short chain substituent group (α) to the long chain substituent group (β) in the whole molecule of the compound (M1) represented by the above general formula (M1) may be in the range of 0.10 to 2.0.
Thus, in the compound (M1), R in the above general formula (M1) 1 、R 2 、R 3 And R 4 The molecular groups (m 1-1) which are all short-chain substituent groups (. Alpha.) may be present together, R 1 、R 2 、R 3 And R 4 The molecular groups (m 1-2) which are all long-chain substituent groups (. Beta.) may be present together, R 1 、R 2 、R 3 And R 4 Part of the groups (m 1-3) of short-chain substituents (α) and the remainder of the groups (β) of long-chain substituents may be present in a mixed manner.
< trinuclear molybdenum dithiocarbamate >
As the trinuclear molybdenum dithiocarbamate, there can be mentioned, for example, a compound represented by the following general formula (3).
Mo 3 S k E m L n A p Q z (3)
In the general formula (3), k is an integer of 1 or more, m is an integer of 0 or more, and k+m is an integer of 4 to 10, preferably an integer of 4 to 7. n is an integer of 1 to 4, and p is an integer of 0 or more. z is an integer from 0 to 5 and has a non-stoichiometric value.
E is each independently an oxygen atom or a selenium atom, for example, a substance which can replace sulfur in the core described below.
L is each independently an anionic ligand having an organic group containing a carbon atom, and the total number of carbon atoms of the organic group in each ligand is 14 or more, and each ligand may be the same or different.
Each a is independently an anion other than L.
Each Q is independently a neutral compound that donates an electron, and is present to satisfy empty coordination on the trinuclear molybdenum compound.
The total number of carbon atoms of the organic group in the anionic ligand represented by L is preferably 14 to 50, more preferably 16 to 30, and even more preferably 18 to 24.
The ligand L is preferably a monoanionic ligand which is a 1-valent anionic ligand, and more preferably a ligand represented by the following general formulae (i) to (iv).
In the general formula (3), the anionic ligand optionally used as L is preferably a ligand represented by the following general formula (iv).
In the general formula (3), the anionic ligands optionally used as L are preferably all the same, and more preferably all the ligands are represented by the following general formula (iv).
[ chemical 3]
In the general formulae (i) to (iv), X 31 ～X 37 Y and Y are each independently an oxygen atom or a sulfur atom, and may be the same or different from each other.
In the general formulae (i) to (iv), R 31 ～R 35 Each independently represents an organic group, and may be the same or different from each other.
It should be noted that R may be selected as 31 、R 32 And R 33 The number of carbon atoms of each organic group is preferably 14 to 50, more preferably 16 to 30, still more preferably 18 to 24.
As R in formula (iv) 34 And R is 35 The total number of carbon atoms of 2 organic groups in (a) is preferably 14 to 50, more preferably 16 to 30, still more preferably 18 to 24.
Can be selected as R 34 And R is 35 The number of carbon atoms of each organic group is preferably 7 to 30, more preferably 7 to 20, still more preferably 8 to 13.
R is as follows 34 And R 35 The organic groups of (2) may be the same as or different from each other, and preferably different from each other. In addition, R 34 The number of carbon atoms and R of the organic radical of (2) 35 The number of carbon atoms of the organic groups of (a) may be the same as or different from each other, and preferably different from each other.
As an alternative to R 31 ～R 35 Examples of the organic group include alkyl groups, aryl groups, substituted aryl groups, and hydrocarbon groups such as ether groups.
The term "hydrocarbon group" means a substituent having a carbon atom directly bonded to the remainder of the ligand, and in the scope of this embodiment, the term "hydrocarbon group" is mainly a hydrocarbon group. The substituents may be as follows.
1. Hydrocarbon substituents
Examples of the hydrocarbon substituent include aliphatic substituents such as alkyl and alkenyl groups, alicyclic substituents such as cycloalkyl and cycloalkenyl groups, aromatic nuclei substituted with an aliphatic group and an alicyclic group, and cyclic groups in which the ring is blocked via another position in the ligand (that is, an alicyclic group may be formed by any 2 of the substituents shown).
2. Substituted hydrocarbon substituents
Examples of the substituted hydrocarbon substituent include a group obtained by substituting the hydrocarbon substituent with a non-hydrocarbon group which does not change the characteristics of the hydrocarbon group. Examples of the non-hydrocarbon group include, for example, halogen groups such as chlorine and fluorine, amino groups, alkoxy groups, mercapto groups, alkylmercapto groups, nitro groups, nitroso groups, and sulfonyloxy groups.
In the foregoing general formula (3), as the anionic ligand optionally used as L, a ligand derived from an alkyl xanthate, a carboxylate, a dialkyldithiocarbamate, and a mixture thereof is preferable, and a ligand derived from a dialkyldithiocarbamate is more preferable.
In the above general formula (3), the anion selected as A may be a 1-valent anion or a 2-valent anion. Examples of anions which can be selected as A include disulfides, hydroxides, alkoxides, amides and thiocyanates, or derivatives thereof.
In the above general formula (3), as Q, water, amine, alcohol, ether, phosphine, and the like are exemplified. Q may be the same or different, and is preferably the same.
The trinuclear molybdenum dithiocarbamate is preferably a compound in which k is an integer of 4 to 7, n is 1 or 2, L is a monoanionic ligand, p is an integer which imparts electroneutrality to the compound based on the anionic charge in a, and m and z are each 0 in the general formula (3), more preferably a compound in which k is an integer of 4 to 7, L is a monoanionic ligand, n is 4, and p, m, and z are each 0.
The trinuclear molybdenum dithiocarbamate is preferably Sup>A compound having Sup>A core represented by the following formulSup>A (IV-A) or (IV-B). Each core has a net charge of +4 (net electrical charge). These cores are surrounded by anionic ligands and, if desired, anions other than anionic ligands.
[ chemical 4]
In the formation of trinuclear molybdenum-sulfur compounds, it is necessary to select the appropriate anionic ligand (L) and other anions (a), i.e. the total anionic charge consisting of sulfur atoms, E atoms in the presence, L and a in the presence, must be-4, depending on, for example, the number of sulfur and E atoms present in the core.
In addition, the trinuclear molybdenum-sulfur compound may contain cations other than molybdenum, such as (alkyl) ammonium, amine, or sodium, when the anionic charge is greater than-4. Preferred embodiments of the anionic ligand (L) and the other anions (A) are those having a structure of 4 monoanionic ligands.
The molybdenum-sulfur cores, for example, the structures shown in (IV-A) and (IV-B) above, can be connected to each other by 1 or 2 or more multidentate ligands, i.e., ligands having more than 1 functional group that can form an oligomer by bonding to Sup>A molybdenum atom.
< molybdenum amine Complex >)
Examples of the molybdenum amine complex include molybdenum amine complexes obtained by reacting molybdenum trioxide and/or molybdic acid, which are 6-valent molybdenum compounds, with amine compounds.
The amine compound is preferably an alkylamine, a dialkylamine, or the like.
The alkylamine and dialkylamine to be reacted with the 6-valent molybdenum compound are not particularly limited, and examples thereof include alkylamine and dialkylamine having an alkyl group having 1 to 30 carbon atoms.
< content of molybdenum-based Friction modifier (M) >)
In the lubricating oil composition of the present embodiment, the content of the molybdenum-based friction modifier (M) is preferably 0.30 mass% or more, more preferably 0.40 mass% or more, further preferably 0.50 mass% or more, and further preferably 3.0 mass% or less, more preferably 2.0 mass% or less, further preferably 1.0 mass% or less, based on the total amount of the lubricating oil composition, from the viewpoint of obtaining excellent fuel economy by reducing the intermetallic friction coefficient.
The upper and lower values of these numerical ranges can be arbitrarily combined. Specifically, it is preferably 0.30 to 3.0 mass%, more preferably 0.40 to 2.0 mass%, and even more preferably 0.50 to 1.0 mass%.
In the lubricating oil composition of the present embodiment, the content of molybdenum atoms derived from the molybdenum-based friction modifier (M) is preferably 50 mass ppm or more, more preferably 80 mass ppm or more, still more preferably 100 mass ppm or more, and further preferably 2000 mass ppm or less, more preferably 1500 mass ppm or less, still more preferably 1000 mass ppm or less, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of improving the friction reducing effect. The upper limit and the lower limit of these numerical ranges can be arbitrarily combined, and specifically, are preferably 50 to 2000 mass ppm, more preferably 80 to 1500 mass ppm, and still more preferably 100 to 1000 mass ppm.
< content ratio of molybdenum dithiocarbamate to molybdenum amine Complex of dinuclear >
In this embodiment, the content ratio of the molybdenum dithiocarbamate to the molybdenum amine complex of the dinuclear [ (dinuclear MoDTC)/(mormn) ] is preferably 0.1 to 10, more preferably 1.5 to 8.0, still more preferably 3.0 to 7.0 in terms of mass ratio from the viewpoint of improving the friction reducing effect.
< other Components >)
The lubricating oil composition of the present embodiment may contain other components than the above components as necessary, within a range that does not impair the effects of the present invention.
Examples of the additives of the other components include metal-based detergents, pour point depressants, antioxidants, antiwear agents, friction modifiers other than molybdenum-based friction modifiers (M), extreme pressure agents, viscosity index improvers, rust inhibitors, antifoaming agents, oiliness improvers, metal inerts, and anti-emulsifiers.
One kind of them may be used alone, or two or more kinds may be used in combination.
Metal-based detergents
The metal-based detergent may be, for example, an organic acid metal salt compound containing a metal atom selected from the group consisting of alkali metals and alkaline earth metals, and specifically, a metal salicylate, a metal phenate, a metal sulfonate, and the like containing a metal atom selected from the group consisting of alkali metals and alkaline earth metals.
In the present specification, the term "alkali metal" means lithium, sodium, potassium, rubidium, and cesium.
The term "alkaline earth metal" means beryllium, magnesium, calcium, strontium, and barium.
The metal atom contained in the metal-based detergent is preferably sodium, calcium, magnesium, or barium, more preferably calcium or magnesium, from the viewpoint of improving detergency at high temperature.
The metal salicylate is preferably a compound represented by the following general formula (4), the metal phenolate is preferably a compound represented by the following general formula (5), and the metal sulfonate is preferably a compound represented by the following general formula (6).
[ chemical 5]
In the general formulae (4) to (6), M is a metal atom selected from alkali metals and alkaline earth metals, preferably sodium, calcium, magnesium, or barium, and more preferably calcium and magnesium. In addition, M E The alkaline earth metal is preferably calcium, magnesium, or barium, more preferably calcium or magnesium. q is the valence of M, which is 1 or 2.R is R 31 And R is 32 Each independently represents a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms. S represents a sulfur atom. r is an integer of 0 or more, preferably an integer of 0 to 3.
As an alternative to R 31 And R is 32 Examples of the hydrocarbon group of (a) include an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 1 to 18 carbon atoms, a cycloalkyl group having 3 to 18 ring-forming carbon atoms, an aryl group having 6 to 18 ring-forming carbon atoms, an alkylaryl group having 7 to 18 carbon atoms, and an arylalkyl group having 7 to 18 carbon atoms.
One kind of them may be used alone, or two or more kinds may be used in combination. Among them, from the viewpoint of improving the high-temperature detergent dispersibility and the solubility in the base oil, one or more selected from the group consisting of calcium salicylate, calcium phenate, calcium sulfonate, magnesium salicylate, magnesium phenate, and magnesium sulfonate are preferable.
These metal-based detergents may be any of neutral salts, basic salts, overbased salts, and mixtures thereof.
The base number of the metal-based detergent is preferably 0 to 600mgKOH/g.
When the metal-based detergent is an alkali salt or an overbased salt, the base number of the metal-based detergent is preferably 10 to 600mgKOH/g, more preferably 20 to 500mgKOH/g.
In the present specification, "base number" means "base number" according to JIS K2501: 2003 "Petroleum products and lubricating oil-neutralization test method" 7. Base number measured based on the perchloric acid method.
In the lubricating oil composition of the present embodiment, the content of the metal-based detergent is preferably 0.01 to 10 mass%, more preferably 0.1 to 5.0 mass%, even more preferably 0.2 to 3.0 mass%, and even more preferably 0.3 to 2.0 mass%, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of easier volatilization of the effect of the present invention.
The metal-based detergent may be used alone or in combination of two or more. The suitable total content when two or more are used is also the same as the aforementioned content.
In the lubricating oil composition of the present embodiment, when the metal atom contained in the metal-based detergent is calcium, the content of the calcium atom derived from the metal-based detergent is preferably 0.05 mass% or more, more preferably 0.10 mass% or more, and even more preferably 0.11 mass% or more, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of high-temperature detergency and dispersibility.
The content of the calcium atom derived from the metal-based detergent is preferably 0.50 mass% or less, more preferably 0.40 mass% or less, still more preferably 0.30 mass% or less, still more preferably 0.20 mass% or less, still more preferably 0.15 mass% or less, and still more preferably 0.13 mass% or less, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of reducing sulfated ash and preventing LSPI (abnormal combustion).
In the lubricating oil composition of the present embodiment, when the metal atom contained in the metal-based detergent is magnesium, the content of the magnesium atom derived from the metal-based detergent is preferably 0.02 mass% or more, more preferably 0.03 mass% or more, and even more preferably 0.04 mass% or more, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of high-temperature detergency and dispersibility.
The content of magnesium atoms derived from the metal-based detergent is preferably 0.07 mass% or less, more preferably 0.06 mass% or less, and even more preferably 0.05 mass% or less, based on the total amount (100 mass%) of the lubricating oil composition, from the viewpoint of reducing sulfated ash and preventing LSPI (abnormal combustion).
Pour point depressants
Examples of the pour point depressant include ethylene-vinyl acetate copolymer, condensate of chlorinated paraffin and naphthalene, condensate of chlorinated paraffin and phenol, polymethacrylate (PMA system; polyalkyl (meth) acrylate, etc.), polyvinyl acetate, polybutene, polyalkylstyrene, etc., and polymethacrylate is preferably used. The weight average molecular weight (Mw) of these polymers used as pour point depressants is preferably 5 to 15 tens of thousands.
One kind of them may be used alone, or two or more kinds may be used in combination.
Antioxidant-
Examples of the antioxidant include amine antioxidants and phenol antioxidants.
Examples of the amine-based antioxidant include diphenylamine-based antioxidants such as diphenylamine and alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms; and naphthylamine antioxidants such as phenyl- α -naphthylamine, phenyl- β -naphthylamine, substituted phenyl- α -naphthylamine having an alkyl group having 3 to 20 carbon atoms, and substituted phenyl- β -naphthylamine having an alkyl group having 3 to 20 carbon atoms.
Examples of the phenolic antioxidants include monophenolic antioxidants such as 2, 6-di-t-butylphenol, 2, 6-di-t-butyl-4-methylphenol, 2, 6-di-t-butyl-4-ethylphenol, isooctyl 3- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate, octadecyl 3- (3, 5-di-t-butyl-4-hydroxyphenyl) propionate; diphenol antioxidants such as 4,4 '-methylenebis (2, 6-di-t-butylphenol) and 2,2' -methylenebis (4-ethyl-6-t-butylphenol); hindered phenol antioxidants, and the like.
One kind of them may be used alone, or two or more kinds may be used in combination.
Abrasion resistant agent-
Examples of the wear-resistant agent include zinc-containing compounds such as zinc dialkyldithiophosphate (ZnDTP) and zinc phosphate; sulfur-containing compounds such as disulfides, sulfurized olefins, sulfurized oils and fats, sulfurized esters, thiocarbonates, thiocarbamates, polysulfides, and the like; phosphorous compounds such as phosphites, phosphates, phosphonites, and amine salts or metal salts thereof; and abrasion-resistant agents containing sulfur and phosphorus, such as thiophosphites, thiophosphates, thiophosphonates, and amine salts or metal salts thereof.
Among them, zinc dialkyldithiophosphate (ZnDTP) is preferable.
One kind of them may be used alone, or two or more kinds may be used in combination.
The content of zinc dithiophosphate is preferably 200 to 5000 mass ppm, more preferably 300 to 2000 mass ppm, based on the total amount of the composition, of phosphorus atom conversion.
Friction regulator other than component (M)
The lubricating oil composition of the present embodiment may contain a friction modifier other than the component (M).
The component (M) is excellent in the effect of effectively exhibiting a friction reducing effect in an environment where the temperature of the lubricating oil composition is high, but by including a friction modifier other than the component (M) in the lubricating oil composition, the effect of effectively exhibiting a friction reducing effect can be exhibited even in an environment where the temperature of the lubricating oil composition is low.
Examples of the friction modifier other than the molybdenum-based friction modifier (M) include ashless friction modifiers such as aliphatic amines, fatty acid esters, fatty amides, fatty acids, aliphatic alcohols, and aliphatic ethers; oils, amines, amides, sulfuration esters, phosphates, phosphites, amine salts of phosphates, and the like.
One kind of them may be used alone, or two or more kinds may be used in combination.
Here, the friction modifier other than the component (M) is preferably an aliphatic amine, and among the aliphatic amines, an aliphatic amine having at least 1 alkyl group or alkenyl group having 2 to 30 carbon atoms in the molecule is preferable.
Among aliphatic amines having an alkyl group or alkenyl group having at least 1 carbon atom number of 2 to 30 in the molecule, diethanolamine compounds represented by the following general formula (7) are preferable.
[ chemical 6]
In the above general formula (7), R 1 Is a C12-30 aliphatic hydrocarbon group having 1 valence.
As R 1 Examples of the aliphatic hydrocarbon group having 12 to 30 carbon atoms include a linear or branched alkyl group having 12 to 30 carbon atoms and a linear or branched alkenyl group having 12 to 30 carbon atoms. The number of carbon atoms of these groups is more preferably 12 to 24, still more preferably 16 to 20.
Examples of the straight-chain or branched alkyl group having 12 to 30 carbon atoms include a variety of dodecyl groups such as n-dodecyl, iso-dodecyl, sec-dodecyl, tert-dodecyl, and neododecyl (hereinafter, a functional group having a predetermined carbon number including straight-chain, branched, and up to isomers thereof will be simply referred to as "various functional groups"), a variety of tridecyl groups, a variety of tetradecyl groups, a variety of pentadecyl groups, a variety of hexadecyl groups, a variety of heptadecyl groups, a variety of octadecyl groups, a variety of nonadecyl groups, a variety of eicosyl groups, a variety of heneicosyl groups, a variety of docosyl groups, a variety of tricosyl groups, a variety of tetracosyl groups, a variety of pentacosyl groups, a variety of hexacosyl groups, a variety of heptacosyl groups, a variety of nonacosyl groups, and a variety of triacontyl groups.
Examples of the straight-chain or branched alkenyl group having 12 to 30 carbon atoms include various dodecenyl groups, various tridecenyl groups, various tetradecenyl groups, various pentadecenyl groups, various hexadecenyl groups, various heptadecenyl groups, various octadecenyl groups, various nonadecenyl groups, various eicosenyl groups, various heneicosenyl groups, various docosyl groups, various tetracosyl groups, various pentacosyl groups, various hexacosenyl groups, various heptacosenyl groups, various octacosenyl groups, various nonacosenyl groups, and various triacontenyl groups.
Among them, in view of the effect of improving the long-acting property, various hexadecyl groups, various heptadecyl groups, and various octadecyl groups as alkyl groups having 16 to 18 carbon atoms, various hexadecenyl groups, various heptadecenyl groups, and various octadecenyl groups as alkenyl groups having 16 to 18 carbon atoms are preferable, various hexadecyl groups, various octadecyl groups, and various octadecenyl groups are more preferable, and n-hexadecyl (palmityl), n-octadecyl (stearyl), and n-octadecenyl (oleyl) groups are more preferable.
As preferable specific compounds of the diethanolamine compound represented by the above general formula (7), there can be mentioned those selected from stearyl diethanolamine (in the general formula (7), R 1 N-octadecyl (stearyl). ) Oleyl diethanolamine (in the general formula (7), R 1 N-octadecenyl (oleyl). ) And palmityldiethanolamine (in the general formula (7), R 1 N-hexadecyl (palmityl). ) More than one of them. Among them, oleyl diethanolamine is preferable.
One kind of them may be used alone, or two or more kinds may be used in combination.
Extreme pressure agent-
Examples of the extreme pressure agent include sulfur-based extreme pressure agents such as sulfides, sulfoxides, sulfones, and thiophosphonates, halogen-based extreme pressure agents such as chlorinated hydrocarbons, and organometallic-based extreme pressure agents. In addition, among the above-mentioned anti-wear agents, a compound having a function as an extreme pressure agent may be used.
One kind of them may be used alone, or two or more kinds may be used in combination.
Rust inhibitor-
Examples of the rust inhibitor include fatty acids, alkenyl succinic acid half esters, fatty acid soaps, alkyl sulfonates, polyol fatty acid esters, fatty acid amines, oxidized paraffins, and alkyl polyoxyethylene ethers.
One kind of them may be used alone, or two or more kinds may be used in combination.
Defoaming agent-
Examples of the defoaming agent include silicone oil such as dimethylpolysiloxane, fluorosilicone oil, and fluoroalkyl ether.
One kind of them may be used alone, or two or more kinds may be used in combination.
Oiliness improver
Examples of the oil-based modifier include aliphatic saturated or unsaturated monocarboxylic acids such as stearic acid and oleic acid; polymerized fatty acids such as dimer acid and hydrogenated dimer acid; hydroxy fatty acids such as ricinoleic acid and 12-hydroxystearic acid; aliphatic saturated or unsaturated monoalcohols such as lauryl alcohol and oleyl alcohol; aliphatic saturated or unsaturated monoamines such as stearylamine and oleylamine; aliphatic saturated or unsaturated monocarboxylic acid amides such as lauramide and oleamide; partial esters of polyhydric alcohols such as glycerin and sorbitol with aliphatic saturated or unsaturated monocarboxylic acids; etc.
Metal inerting agent
Examples of the metal inerting agent include benzotriazole-based compounds, methylbenzotriazole-based compounds, thiadiazole-based compounds, imidazole-based compounds, pyrimidine-based compounds, and the like.
One kind of them may be used alone, or two or more kinds may be used in combination.
Anti-emulsifying agent
Examples of the anti-emulsifying agent include anionic surfactants such as sulfate salts of castor oil and petroleum sulfonate; cationic surfactants such as quaternary ammonium salts and imidazolines; polyalkylene glycol nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether and polyoxyethylene alkylnaphthyl ether; esters of polyoxyalkylene polyethylene glycols and dicarboxylic acids thereof; alkylene oxide adducts of alkylphenol-formaldehyde polycondensates, and the like.
One kind of them may be used alone, or two or more kinds may be used in combination.
The content of the other components is appropriately adjusted within a range that does not impair the effects of the present invention, and the content of each of the other components is usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, more preferably 0.01 to 7% by mass, and even more preferably 0.03 to 5% by mass, based on the total amount (100% by mass) of the lubricating oil composition.
In the present specification, the additive as the other component may be mixed with the other component in the form of a solution obtained by diluting and dissolving a part of the mineral oil base oil (a) in view of handling properties, solubility in the mineral oil base oil (a), and the like. In this case, in the present specification, the content of the additive as the other component means a content in terms of an effective component (in terms of a resin component) from which the diluent oil is removed.
[ physical Property values of lubricating oil composition ]
< 40 ℃ kinematic viscosity, 100 ℃ kinematic viscosity, and viscosity index >
The upper limit of the kinematic viscosity at 40℃of the lubricating oil composition of the present embodiment is preferably 5.0mm from the viewpoint of improving fuel economy, and the lower limit is preferably 5.0mm from the viewpoint of reducing the loss of the lubricating oil composition due to evaporation and securing the oil film retention property 2 At least/s, more preferably 10.0mm 2 At least/s, more preferably 15.0mm 2 At least/s, preferably 65.0mm 2 Preferably less than or equal to/s, more preferably 45.0mm 2 And is not more than/s, more preferably 30.0mm 2 And/s or less. The upper and lower limits of these numerical ranges can be arbitrarily combined, and specifically, are preferably 5.0 to 65.0mm 2 And/s, more preferably 10.0 to 45.0mm 2 And/s, more preferably 15.0 to 30.0mm 2 /s。
The upper limit of the 100℃kinematic viscosity of the lubricating oil composition of the present embodiment is preferably 3.0mm from the viewpoint of improving fuel economy, and the lower limit is preferably 3.0mm from the viewpoint of reducing the loss of the lubricating oil composition due to evaporation and securing oil film retention 2 At least/s, more preferably 3.5mm 2 At least/s, more preferably 4.0mm 2 At least/s, preferably 9.3mm 2 Preferably less than/s, more preferably 8.2mm 2 And/s is less than or equal to, more preferably 7.1mm 2 And/s or less. The upper and lower limits of these numerical ranges can be arbitrarily combined, and specifically, are preferably 3.0 to 9.3mm 2 And/s, more preferably 3.5 to 8.2mm 2 And/s, more preferably 4.0 to 7.1mm 2 /s。
The viscosity index of the lubricating oil composition of the present embodiment is preferably 100 or more, more preferably 110 or more, still more preferably 120 or more, and still more preferably 130 or more. When the viscosity index is within the above range, the viscosity change due to temperature becomes small.
The aforementioned 40 ℃ kinematic viscosity, the aforementioned 100 ℃ kinematic viscosity, and viscosity index can be according to JIS K2283: 2000 measured or calculated.
[ HTHS viscosity at 150 ℃ (HTHS) 150 )]
The lubricating oil composition of the present embodiment has an HTHS viscosity (HTHS 150 ) Preferably 1.5 mPas or more, more preferably 1.7 mPas or more, and still more preferably less than 3.7 mPas, more preferably less than 3.0 mPas.
The lubricating oil composition of the present embodiment has an HTHS viscosity (HTHS 150 ) Can use a TBS high temperature viscometer (Tapered Bearing Simulator Viscometer) according to ASTM D4683 at 10 6 Shear rate determination/s.
[ coefficient of friction ]
The friction coefficient when the lubricating oil composition of the present embodiment is used can be evaluated by using an SRV tester (manufactured by Optimol corporation), for example. Specifically, the evaluation can be performed by the method described in examples described below. The friction coefficient of the lubricating oil composition of the present embodiment is preferably 0.097 or less, more preferably 0.095 or less under the conditions that the oil temperature is 30 ℃ and the maximum height roughness (Rz) of the disc surface is less than 0.20 μm.
[ use of lubricating oil composition ]
The lubricating oil composition of the present embodiment is excellent in the effect of reducing the friction coefficient.
Therefore, the lubricating oil composition of the present embodiment is preferably used for an internal combustion engine, and more preferably used for an internal combustion engine of a four-wheel vehicle or a two-wheel motorcycle.
The lubricating oil composition of the present embodiment is preferably used as an engine oil, and is more preferably used as an engine oil for an automobile engine equipped with a hybrid mechanism or an idle reduction mechanism because of its excellent effect of reducing the friction coefficient in a low temperature region.
The lubricating oil composition of the present embodiment is suitable for use as a lubricating oil composition for an internal combustion engine (engine oil for an internal combustion engine) used in an automobile or the like, but may be used for other applications.
Further, the lubricating oil composition of the present embodiment has an effect of particularly reducing the friction coefficient between members having small surface roughness, and is therefore also suitable as engine oil for an engine in which mirror-finish is applied to the inside of a cylinder pit of an engine block. More specifically, the engine using the lubricating oil composition of the present embodiment preferably has a maximum height roughness (Rz) inside the cylinder pits of less than 0.45 μm, more preferably less than 0.30 μm, and even more preferably less than 0.20 μm.
The maximum height roughness (Rz) can be measured specifically by JIS B0601-2001.
[ method for producing lubricating oil composition ]
The method for producing the lubricating oil composition according to the present embodiment is not particularly limited.
For example, the method for producing a lubricating oil composition according to the present embodiment includes a step of mixing the mineral oil base oil (a), the polymer (B), and the molybdenum-based friction modifier (M). If necessary, one or more other components selected from the above may be further mixed.
The method of mixing the above components is not particularly limited, and examples thereof include a method having a step of mixing the components (component (B) and component (M)) with the mineral oil base oil (a) and further selecting one or more of the other components. The components may be mixed in the form of a solution (dispersion) by adding a diluent oil. The components are preferably mixed and then stirred by a known method to uniformly disperse the components.
[ Engine ]
The present embodiment also provides an engine comprising the lubricating oil composition of the present invention.
As the engine, as described above, there may be mentioned a vehicle engine such as an automobile, and the like, preferably an automobile engine, and more preferably an automobile engine equipped with a hybrid mechanism or an idle reduction mechanism in which the oil temperature is liable to be reduced.
In the engine of the present embodiment, the maximum height roughness (Rz) of the cylinder pit inner surface of the engine block is preferably less than 0.45 μm, more preferably less than 0.30 μm, and even more preferably less than 0.20 μm for the reasons described above.
[ method of lubricating an Engine ]
The present invention also provides a method for lubricating an engine by using the lubricating oil composition according to the present embodiment.
The engine to be lubricated by the lubrication method according to the present embodiment is similar to the engine provided by the present invention.
That is, a preferable mode of the method for lubricating an engine of the present embodiment is a method for lubricating an engine of an automobile in which a hybrid mechanism or an idle reduction mechanism is mounted, in which the maximum height roughness (Rz) of the inner surface of a cylinder pocket of an engine block is preferably less than 0.45 μm, more preferably less than 0.30 μm, and less than 0.20 μm, using the lubricating oil composition of the present invention.
[ one embodiment of the present invention provided ]
According to one embodiment of the present invention, the following [1] to [9] can be provided.
[1]Lubricating oil composition comprising mineral oil base oil (A), polymer (B) having weight average molecular weight (Mw) of 100-15000, and molybdenum-based friction modifier (M) and having a kinematic viscosity at 40 ℃ of 35.0mm 2 And/s or less.
[2] The lubricating oil composition according to [1], wherein the content of the polymer (B) is 0.1 to 5.0 mass% based on the total amount of the lubricating oil in terms of solid content.
[3] The lubricating oil composition according to [1] or [2], wherein the polymer (B) is a polyolefin (B-1).
[4] The lubricating oil composition according to any one of [1] to [3], wherein the weight average molecular weight (Mw) of the polymer (B) is 1000 to 11000.
[5] The lubricating oil composition according to any one of [1] to [4], wherein the molybdenum-based friction modifier (M) comprises two or more selected from the group consisting of a dinuclear molybdenum dithiocarbamate, a trinuclear molybdenum dithiocarbamate, and a molybdenum amine complex.
[6] The lubricating oil composition according to any one of [1] to [5], wherein the content of the molybdenum-based friction modifier (M) is 50 to 2000 mass ppm in terms of molybdenum atom conversion based on the total amount of the composition.
[7] The lubricating oil composition according to any one of [1] to [6], which is used for an engine having a member with a maximum height roughness (Rz) of the surface of less than 0.45 μm.
[8] The lubricating oil composition according to any one of [1] to [7], which is used for an automobile engine equipped with a hybrid mechanism or an idle reduction mechanism.
[9] A method for lubricating an engine, wherein the lubricating oil composition according to any one of [1] to [7] is used to lubricate an engine having a member with a maximum height roughness (Rz) of the surface of less than 0.45 [ mu ] m.
Examples
The present invention is specifically described by the following examples, but the present invention is not limited to the following examples. The respective components used in examples and comparative examples and the respective properties of the obtained lubricating oil compositions were measured by the following methods.
[40 ℃ kinematic viscosity, 100 ℃ kinematic viscosity, and viscosity index ]
According to JIS K2283: 2000, the 40 ℃ kinematic viscosity, 100 ℃ kinematic viscosity, and viscosity index of the lubricating oil composition were determined or calculated.
[ HTHS viscosity at 150 ]
The HTHS viscosity at 150℃was measured or calculated from JPI-5S-36-03.
[ content of molybdenum atom and phosphorus atom ]
The content of molybdenum atoms and phosphorus atoms was determined according to JPI-5S-38-03.
[ weight average molecular weight (Mw), number average molecular weight (Mn), molecular weight distribution (Mw/Mn) ]
On "1515 Isocric HPLC pump" manufactured by Waters, and "2414 differential Refractive Index (RI) detector", 1 column "TSKguardcolumn SuperHZ-L" and "TSKSuperMultipore HZ-M"2 columns manufactured by Tosoh were mounted in this order from the upstream side, and the temperature was measured: 40 ℃, mobile phase: tetrahydrofuran, flow rate: measured under the conditions of 0.35 mL/min and 1.0mg/mL of sample concentration, and obtained by conversion of standard polystyrene.
Examples 1 to 11 and comparative examples 1 to 4
The following components were added and thoroughly mixed in the amounts shown in table 1 to obtain a lubricating oil composition.
Details of the respective components used in examples 1 to 11 and comparative examples 1 to 4 are as follows.
The content in table 1 is a content in terms of a resin component.
Base oil (A) >, base oil (A)
Mineral oil 1 (classification under API base oil category: group III, 40 ℃ C. Kinematic viscosity: 19.8 mm) 2 S, kinematic viscosity at 100 ℃): 4.0mm 2 S, viscosity index: 125)
Mineral oil 2 (classification under API base oil category: group II, 40 ℃ kinematic viscosity:
406.6mm 2 s, kinematic viscosity at 100 ℃): 30.6mm 2 S, viscosity index: 106)
< Polymer >)
[ Polymer corresponding to component (B) ]
Polymer 1 (olefin oligomer), weight average molecular weight (Mw): 2500, number average molecular weight (Mn): 1600, molecular weight distribution (Mw/Mn): 1.6
Polymer 2 (olefin oligomer), weight average molecular weight (Mw): 4800, number average molecular weight (Mn): 3000, molecular weight distribution (Mw/Mn): 1.6
Polymer 3 (olefin oligomer, weight average molecular weight (Mw): 10000, number average molecular weight (Mn): 5900, molecular weight distribution (Mw/Mn): 1.7)
Polymer 4 (Poly-alpha-olefin), weight average molecular weight (Mw): 6600, number average molecular weight (Mn): 3300, molecular weight distribution (Mw/Mn): 2.0
Polymer 5 (polyalphaolefin), weight average molecular weight (Mw) 1100, number average molecular weight (Mn) 900, molecular weight distribution (Mw/Mn) 1.2
Polymer 6 (polybutene, weight average molecular weight (Mw): 5300, number average molecular weight (Mn): 4500, molecular weight distribution (Mw/Mn): 1.2)
Polymer 7 (polybutene, weight average molecular weight (Mw): 8100, number average molecular weight (Mn): 6600, molecular weight distribution (Mw/Mn): 1.2)
Polymer 8 (polybutene, weight average molecular weight (Mw): 14000, number average molecular weight (Mn): 10000, molecular weight distribution (Mw/Mn): 1.4)
[ other polymers ]
Polymer 9 (olefin oligomer, weight average molecular weight (Mw): 17000, number average molecular weight (Mn): 11000, molecular weight distribution (Mw/Mn): 1.5)
Polymer 10 (polymethacrylate), weight average molecular weight (Mw): 26000, number average molecular weight (Mn): 19000, molecular weight distribution (Mw/Mn): 1.4
Molybdenum-based friction modifier (M)
Molybdenum DTC: molybdenum dialkyldithiocarbamate represented by the following structural formula (MoDTC, content of molybdenum atom: 10.0% by mass)
[ chemical 7]
[ in the above structural formula, R 1 、R 2 、R 3 And R 4 Each independently selected from isooctyl [ ]Number of carbon atoms 8: short chain substituent group) and isotridecyl (carbon number 13: long chain substituent group), the molar ratio of isooctyl to isotridecyl in the entire molecule of molybdenum dialkyldithiocarbamate is 50:50.x is X 1 And X 2 Is a sulfur atom, X 3 And X 4 Is an oxygen atom.]
Molybdenum amine complex: (molybdenum atom content: 7.9% by mass)
Molybdenum trinuclear dithiocarbamate: (MoDTC, molybdenum atom content: 10% by mass)
< other Components >)
Pour point depressant, antioxidant, zinc dialkyldithiophosphate (ZnDTP)
[ atom content ]
In table 1, the content of molybdenum atoms in the lubricating oil composition is a value reflecting the content of molybdenum atoms derived from the molybdenum-based friction modifier (M).
In tables 1 to 2, the content of phosphorus atoms in the lubricating oil composition is a value reflecting the content of phosphorus atoms derived from ZnDTP as another additive.
The lubricating oil compositions obtained in examples 1 to 11 and comparative examples 1 to 4 were evaluated as follows. The results are shown in Table 1.
[ evaluation of Friction coefficient ]
The friction coefficient when using the prepared lubricating oil composition was measured using an SRV tester (manufactured by Optimel Co.) under the following conditions.
First, the temperature was raised from 30℃to 140℃once every 10℃and at the same time, the temperature was raised for 5 minutes, and the test was performed while sliding under the following conditions.
The coefficient of friction was measured 1 time every 1 second for the last 1 minute of the above test at 140℃and the average value of the coefficient of friction in the last 1 minute was calculated.
Cylinder: AISI52100
Standard disk: AISI52100 (maximum height roughness (Rz): 0.45-0.65 μm)
Mirror plate: AISI52100 (maximum height roughness (Rz): less than 0.20 μm)
Frequency: 50Hz
Amplitude: 1.5mm
Load: 400N
Temperature: heating at 30-140 deg.c once every 10 deg.c
Test time: each temperature for 5 minutes
As can be seen from table 1, it is found that the lubricating oil compositions of examples 1 to 11, which all satisfy the constitution of the present invention, have a friction coefficient of 0.098 or less for a mirror plate having an oil temperature of 30 ℃.
On the other hand, it was found that the lubricating oil compositions of comparative examples 1 to 4 had higher friction coefficients than the lubricating oil compositions of examples 1 to 11.
Claims (9)
1. Lubricating oil composition comprising mineral oil base oil (A), polymer (B) having weight average molecular weight (Mw) of 100-15000, and molybdenum-based friction modifier (M) and having a kinematic viscosity at 40 ℃ of 35.0mm 2 And/s or less.
2. The lubricating oil composition according to claim 1, wherein the content of the polymer (B) is 0.1 to 5.0% by mass based on the total amount of the lubricating oil in terms of solid content.
3. Lubricating oil composition according to claim 1 or 2, wherein the aforementioned polymer (B) is a polyolefin (B-1).
4. The lubricating oil composition according to any one of claims 1 to 3, wherein the weight average molecular weight (Mw) of the polymer (B) is 1000 to 11000.
5. The lubricating oil composition according to any one of claims 1 to 4, wherein the molybdenum-based friction modifier (M) comprises 2 or more selected from the group consisting of a dinuclear molybdenum dithiocarbamate, a trinuclear molybdenum dithiocarbamate, and a molybdenum amine complex.
6. The lubricating oil composition according to any one of claims 1 to 5, wherein the content of the molybdenum-based friction modifier (M) is 50 to 2000 mass ppm in terms of molybdenum atom conversion based on the total amount of the composition.
7. The lubricating oil composition according to any one of claims 1 to 6 for use in an engine having a member with a surface having a maximum height roughness (Rz) of less than 0.45 μm.
8. The lubricating oil composition according to any one of claims 1 to 7, which is used for an automobile engine on which a hybrid mechanism or an idle reduction mechanism is mounted.
9. A method for lubricating an engine, wherein the lubricating oil composition according to any one of claims 1 to 7 is used to lubricate an engine having a member with a maximum height roughness (Rz) of the surface of less than 0.45 μm.
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| JP2021-058399 | 2021-03-30 | ||
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| PCT/JP2022/007934 WO2022209487A1 (en) | 2021-03-30 | 2022-02-25 | Lubricating oil composition |
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| JP4614427B2 (en) * | 2003-08-06 | 2011-01-19 | 日産自動車株式会社 | Low friction sliding mechanism, manual transmission and final reduction gear |
| JP4876464B2 (en) * | 2005-07-19 | 2012-02-15 | 株式会社豊田中央研究所 | Low friction sliding member |
| JP5727713B2 (en) * | 2010-03-19 | 2015-06-03 | 出光興産株式会社 | Lubricating oil composition for internal combustion engines |
| SG10201504239SA (en) * | 2014-06-02 | 2016-01-28 | Infineum Int Ltd | Lubrication oil compositions |
| JP2018062551A (en) * | 2016-10-11 | 2018-04-19 | 出光興産株式会社 | Lubricant composition |
| JP7098623B2 (en) * | 2017-08-10 | 2022-07-11 | 出光興産株式会社 | Lubricating oil composition, internal combustion engine, and method of lubricating internal combustion engine |
| JP2019189668A (en) * | 2018-04-18 | 2019-10-31 | Ｅｍｇルブリカンツ合同会社 | Lubricant composition |
| JP7352483B2 (en) * | 2019-02-25 | 2023-09-28 | 三洋化成工業株式会社 | Friction modifiers and lubricating oil compositions |
| US11965142B2 (en) * | 2019-03-29 | 2024-04-23 | Idemitsu Kosan Co., Ltd. | Lubricating oil composition |
| JP7237753B2 (en) * | 2019-06-28 | 2023-03-13 | 出光興産株式会社 | Lubricating oil composition for internal combustion engine |
| JP2020158784A (en) * | 2020-06-30 | 2020-10-01 | 出光興産株式会社 | Lubricant composition, internal combustion engine and lubrication method of internal combustion engine |
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