EP4310165A1 - Composition lubrifiante - Google Patents
Composition lubrifiante Download PDFInfo
- Publication number
- EP4310165A1 EP4310165A1 EP22771032.4A EP22771032A EP4310165A1 EP 4310165 A1 EP4310165 A1 EP 4310165A1 EP 22771032 A EP22771032 A EP 22771032A EP 4310165 A1 EP4310165 A1 EP 4310165A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricating oil
- oil composition
- mass
- compound
- group
- 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.)
- Pending
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- 239000000203 mixture Substances 0.000 title claims abstract description 174
- 239000000314 lubricant Substances 0.000 title 1
- 239000010687 lubricating oil Substances 0.000 claims abstract description 184
- 150000001875 compounds Chemical class 0.000 claims abstract description 122
- 239000003607 modifier Substances 0.000 claims abstract description 69
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 58
- 239000011733 molybdenum Substances 0.000 claims abstract description 57
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000012964 benzotriazole Substances 0.000 claims abstract description 48
- 239000002199 base oil Substances 0.000 claims abstract description 37
- 125000001424 substituent group Chemical group 0.000 claims description 73
- 125000004432 carbon atom Chemical group C* 0.000 claims description 50
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 125000001931 aliphatic group Chemical group 0.000 claims description 26
- 239000003963 antioxidant agent Substances 0.000 claims description 23
- 230000003078 antioxidant effect Effects 0.000 claims description 23
- 239000003599 detergent Substances 0.000 claims description 22
- 125000000217 alkyl group Chemical group 0.000 claims description 17
- 239000002270 dispersing agent Substances 0.000 claims description 15
- 230000000994 depressogenic effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000000654 additive Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 125000004434 sulfur atom Chemical group 0.000 claims description 13
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000004090 dissolution Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000003502 gasoline Substances 0.000 claims description 5
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 claims description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 39
- 239000010949 copper Substances 0.000 abstract description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 38
- 238000005260 corrosion Methods 0.000 abstract description 30
- 230000007797 corrosion Effects 0.000 abstract description 30
- 239000000446 fuel Substances 0.000 abstract description 26
- -1 polyol ester Chemical class 0.000 description 34
- 239000003921 oil Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 24
- 230000001747 exhibiting effect Effects 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 19
- 238000012360 testing method Methods 0.000 description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 11
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 11
- 229920000193 polymethacrylate Polymers 0.000 description 11
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical class O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 11
- 150000001342 alkaline earth metals Chemical class 0.000 description 10
- 239000002585 base Substances 0.000 description 10
- 229910052791 calcium Inorganic materials 0.000 description 10
- 239000011575 calcium Substances 0.000 description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 8
- 239000002480 mineral oil Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 8
- 125000004429 atom Chemical group 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 229910052783 alkali metal Inorganic materials 0.000 description 6
- 150000001340 alkali metals Chemical class 0.000 description 6
- 150000001412 amines Chemical class 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 6
- 235000014113 dietary fatty acids Nutrition 0.000 description 6
- 238000010828 elution Methods 0.000 description 6
- 239000000194 fatty acid Substances 0.000 description 6
- 229930195729 fatty acid Natural products 0.000 description 6
- 235000010446 mineral oil Nutrition 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 101100208720 Homo sapiens USP5 gene Proteins 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 102100021017 Ubiquitin carboxyl-terminal hydrolase 5 Human genes 0.000 description 5
- 229910052796 boron Inorganic materials 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
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229960002317 succinimide Drugs 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 239000003085 diluting agent Substances 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000004711 α-olefin Substances 0.000 description 4
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- BVUXDWXKPROUDO-UHFFFAOYSA-N 2,6-di-tert-butyl-4-ethylphenol Chemical compound CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BVUXDWXKPROUDO-UHFFFAOYSA-N 0.000 description 2
- DHTAIMJOUCYGOL-UHFFFAOYSA-N 2-ethyl-n-(2-ethylhexyl)-n-[(4-methylbenzotriazol-1-yl)methyl]hexan-1-amine Chemical compound C1=CC=C2N(CN(CC(CC)CCCC)CC(CC)CCCC)N=NC2=C1C DHTAIMJOUCYGOL-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 150000003939 benzylamines Chemical class 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 2
- 229960001860 salicylate Drugs 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 235000011044 succinic acid Nutrition 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- XKZQKPRCPNGNFR-UHFFFAOYSA-N 2-(3-hydroxyphenyl)phenol Chemical compound OC1=CC=CC(C=2C(=CC=CC=2)O)=C1 XKZQKPRCPNGNFR-UHFFFAOYSA-N 0.000 description 1
- GPNYZBKIGXGYNU-UHFFFAOYSA-N 2-tert-butyl-6-[(3-tert-butyl-5-ethyl-2-hydroxyphenyl)methyl]-4-ethylphenol Chemical compound CC(C)(C)C1=CC(CC)=CC(CC=2C(=C(C=C(CC)C=2)C(C)(C)C)O)=C1O GPNYZBKIGXGYNU-UHFFFAOYSA-N 0.000 description 1
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 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 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical class C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 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 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004369 butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 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 1
- 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 1
- 238000007865 diluting Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 1
- 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 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 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 1
- 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 1
- 125000006038 hexenyl group Chemical group 0.000 description 1
- 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 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002462 imidazolines Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 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 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 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 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 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 1
- 239000003345 natural gas Substances 0.000 description 1
- 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 1
- 125000005187 nonenyl group Chemical group C(=CCCCCCCC)* 0.000 description 1
- 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 1
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 1
- 125000002347 octyl 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])[H] 0.000 description 1
- 125000001117 oleyl 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])=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 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 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 1
- 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 1
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 229920013636 polyphenyl ether polymer 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
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000003918 potentiometric titration Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 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 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000003900 succinic acid esters Chemical class 0.000 description 1
- 150000003444 succinic acids Chemical class 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000008054 sulfonate salts Chemical class 0.000 description 1
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000005065 undecenyl group Chemical group C(=CCCCCCCCCC)* 0.000 description 1
- 125000002948 undecyl 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])[H] 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
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/38—Heterocyclic nitrogen compounds
- C10M133/44—Five-membered ring containing nitrogen and carbon only
-
- 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
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/12—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
-
- 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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/28—Amides; Imides
-
- 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
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/046—Overbasedsulfonic acid 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
- 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
- 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
- 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
- C10N2030/04—Detergent property or dispersant property
-
- 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
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
-
- 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
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- 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
- C10N2030/40—Low content or no content compositions
- C10N2030/45—Ash-less or low ash content
-
- 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
- C10N2030/54—Fuel economy
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- 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
- C10N2040/255—Gasoline engines
Definitions
- the present invention relates to a lubricating oil composition.
- a lubricating oil composition used in an internal combustion engine such as an engine is required to have a further improved fuel efficiency. Therefore, along with efforts to reduce a viscosity of the lubricating oil composition, a research on a molybdenum-based friction modifier is also progressing from the viewpoint of exhibiting a higher friction reducing effect.
- MoDTC molybdenum dithiocarbamate
- R 1 to R 4 are isoalkyl groups each having C 11 to C 14 .
- X represents an oxygen atom and/or a sulfur atom.
- R 1 to R 4 contain on average more than 98% of C 13 .
- PTL 2 also discloses that a lubricating oil composition prepared by blending MoDTC represented by the above general formula (1) has excellent storage stability at a low temperature (hereinafter, also referred to as "low-temperature storage stability").
- the lubricating oil composition prepared by blending MoDTC proposed in PTL 2 has excellent low-temperature storage stability, but has poor copper corrosion resistance.
- the lubricating oil composition having poor copper corrosion resistance has a problem that deterioration is accelerated due to copper elution into the oil caused by corrosion of a copper-based member used in the internal combustion engine such as an engine. Therefore, the lubricating oil composition is required to have excellent copper corrosion resistance in addition to excellent low-temperature storage stability.
- the lubricating oil composition is required to be further improved in fuel efficiency.
- an object of the present invention is to provide a lubricating oil composition having excellent low-temperature storage stability, excellent copper corrosion resistance, and a high fuel efficiency.
- the "copper corrosion resistance” means that even when the copper-based members are corroded, the copper elution into the oil is unlikely to occur.
- the present inventors have conducted diligent studies in order to solve the above problems. As a result, it is found that a lubricating oil composition containing a specific molybdenum-based friction modifier and a specific amount of a benzotriazole-based compound can solve the above problems, and various studies have been further repeated, and thus the present invention has been completed.
- the present invention relates to the following [1] to [3],
- a lubricating oil composition having excellent low-temperature storage stability, excellent copper corrosion resistance, and a high fuel efficiency.
- a lubricating oil composition according to the present embodiment contains a base oil (A), a molybdenum-based friction modifier (B), and a benzotriazole-based compound (C).
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1).
- R 1 , R 2 , R 3 , and R 4 each independently represent a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 13 to 22 carbon atoms.
- a molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in all molecules of the compound (B1) is 0.10 to 0.50.
- X 1 , X 2 , X 3 , and X 4 each independently represent an oxygen atom or a sulfur atom.
- a content of the benzotriazole-based compound (C) is 0.03 mass% or less based on a total amount of the lubricating oil composition.
- a kinematic viscosity at 100°C of the lubricating oil composition according to the present embodiment is 9.3 mm 2 /s or less.
- the present inventors have conducted diligent studies in order to solve the above problems.
- a lubricating oil composition prepared by blending a compound represented by the general formula (b1), in which R 1 , R 2 , R 3 , and R 4 are each an alkyl group having 13 carbon atoms, the short-chain substituent group ( ⁇ ) is substantially not contained and only the long-chain substituent group ( ⁇ ) is substantially contained, has been investigated. As a result, it has been found that the lubricating oil composition has good low-temperature storage stability, but has poor copper corrosion resistance.
- the present inventors have further conducted various studies based on the above study results. As a result, it has been found that the molar ratio of the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the compound (B1) represented by the general formula (b1) and the content of the benzotriazole-based compound in the lubricating oil composition are important in solving the above problems, and then various studies are repeated to complete the present invention.
- base oil (A) the "molybdenum-based friction modifier (B)”, and the “benzotriazole-based compound (C)” are also referred to as a “component (A)”, a “component (B)”, and a “component (C)”, respectively.
- a total content of the component (A), the component (B), and the component (C) is preferably 80 mass% or more, more preferably 85 mass% or more, and still more preferably 88 mass% or more, based on the total amount of the lubricating oil composition.
- an upper limit value of the total content of the component (A), the component (B), and the component (C) may be adjusted in relation to lubricating oil additives other than the component (A), the component (B), and the component (C), and is usually less than 100 mass%, preferably 99 mass% or less, more preferably 97 mass% or less, and still more preferably 95 mass% or less.
- the total content of the component (A), the component (B), and the component (C) is preferably 80 mass% to less than 100 mass%, more preferably 85 mass% to 99 mass% or less, still more preferably 88 mass% to 97 mass%, and even more preferably 88 mass% to 95 mass%.
- the lubricating oil composition according to the present embodiment contains the base oil (A).
- base oil (A) one or more selected from a mineral oil and a synthetic oil used in the related art as base oils for lubricating oils can be used without particular limitation.
- Examples of the mineral oil include: an atmospheric residual oil obtained by distilling a crude oil, such as a paraffin-based crude oil, an intermediate-base crude oil, or a naphthene-based crude oil, under an atmospheric pressure; a distillate oil obtained by distilling the atmospheric residual oil under a reduced pressure; and a mineral oil obtained by subjecting this distillate oil to one or more of solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, and the like.
- a crude oil such as a paraffin-based crude oil, an intermediate-base crude oil, or a naphthene-based crude oil
- a distillate oil obtained by distilling the atmospheric residual oil under a reduced pressure
- mineral oil obtained by subjecting this distillate oil to one or more of solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, and the like.
- the synthetic oil examples include: a poly- ⁇ -olefin such as an ⁇ -olefin homopolymer and an ⁇ -olefin copolymer (for example, an ⁇ -olefin copolymer having 8 to 14 carbon atoms, such as an ethylene- ⁇ -olefin copolymer); an isoparaffin; various esters such as a polyol ester and a dibasic acid ester; various ethers such as a polyphenyl ether; a polyalkylene glycol; an alkylbenzene; an alkylnaphthalene; and a gas-to-liquid (GTL) base oil obtained by isomerizing a wax (GTL wax) produced from a natural gas by a Fischer-Tropsch method or the like.
- a poly- ⁇ -olefin such as an ⁇ -olefin homopolymer and an ⁇ -olefin copolymer (for example, an ⁇ -olefin cop
- the base oil (A) is preferably a base oil classified as Group 2, 3, or 4 of the base oil category according to American Petroleum Institute (API).
- API American Petroleum Institute
- a mineral oil can be used alone or a plurality of mineral oils can be used in combination, or a synthetic oil can be used alone or a plurality of synthetic oils can be used in combination.
- one or more mineral oils and one or more synthetic oils can be used in combination.
- a kinematic viscosity at 100°C of the base oil (A) is preferably 2.0 mm 2 /s to 9.0 mm 2 /s, more preferably 3.0 mm 2 /s to 7.0 mm 2 /s, and still more preferably 4.0 mm 2 /s to 4.5 mm 2 /s.
- a viscosity index of the base oil (A) is preferably 80 or more, more preferably 90 or more, still more preferably 100 or more, and even more preferably 120 or more, from the viewpoint of a reduction in viscosity change due to a temperature change and improvement in fuel efficiency.
- the viscosity index is usually 200 or less.
- the base oil (A) is a mixed base oil containing two or more kinds of base oils
- the kinematic viscosity at 100°C and the viscosity index of this mixed base oil are preferably within the above ranges.
- the kinematic viscosity at 100°C and the viscosity index are values measured or calculated in accordance with JIS K2283:2000.
- a content of the base oil (A) is preferably 97 mass% or less, more preferably 95 mass% or less, and still more preferably 93 mass% or less, based on the total amount of the lubricating oil composition.
- the content of the base oil (A) is preferably 75 mass% or more, more preferably 80 mass% or more, and still more preferably 85 mass% or more, based on the total amount of the lubricating oil composition.
- the content of the base oil (A) is preferably 75 mass% to 97 mass%, more preferably 80 mass% to 95 mass%, and still more preferably 85 mass% to 93 mass%.
- the lubricating oil composition according to the present embodiment contains the molybdenum-based friction modifier (B).
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b 1).
- R 1 , R 2 , R 3 , and R 4 each independently represent a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 13 to 22 carbon atoms.
- a molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in all molecules of the compound (B1) is 0.10 to 0.50.
- X 1 , X 2 , X 3 , and X 4 each independently represent an oxygen atom or a sulfur atom.
- Examples of the aliphatic hydrocarbon group having 4 to 12 carbon atoms which can be selected as the short-chain substituent group ( ⁇ ), include an alkyl group having 4 to 12 carbon atoms and an alkenyl group having 4 to 12 carbon atoms.
- a butyl group a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, an undecenyl group, and a dodecenyl group.
- These may be linear or branched.
- the number of carbon atoms in the aliphatic hydrocarbon group that can be selected as the short-chain substituent group ( ⁇ ) is preferably 5 to 11, more preferably 6 to 10, and still more preferably 7 to 9.
- Examples of the aliphatic hydrocarbon group having 13 to 22 carbon atoms which can be selected as the long-chain substituent group ( ⁇ ), include an alkyl group having 13 to 22 carbon atoms and an alkenyl group having 13 to 22 carbon atoms.
- Specific examples thereof include a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an eicosyl group, a heneicosyl group, a docosyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group, an octadecenyl group, an oleyl group, a nonadecenyl group, an icosenyl group, a heneicosenyl group, and a docosenyl group. These may be linear or branched.
- the number of carbon atoms in the aliphatic hydrocarbon group that can be selected as the long-chain substituent group ( ⁇ ) is preferably 13 to 20, more preferably 13 to 16, and still more preferably 13 to 14.
- the molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in all molecules of the compound (B1) represented by the general formula (b1) should be 0.10 and 0.50 as described above.
- the molar ratio [( ⁇ )/( ⁇ )] is less than 0.10, the copper corrosion resistance is poor. In addition, the fuel efficiency tends to be easily degraded.
- the molar ratio [( ⁇ )/( ⁇ )] is more than 0.50, the low-temperature storage stability is poor.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 0.15 or more, and more preferably 0.20 or more.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 0.45 or less, more preferably 0.42 or less, and still more preferably 0.40 or less.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 0.15 to 0.45, more preferably 0.20 to 0.42, and still more preferably 0.20 to 0.40.
- the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) may coexist in the same molecule or may not coexist in the same molecule. That is, an average value of the molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in all molecules of the compound (B1) represented by the general formula (b1) may be in the range of 0.10 to 0.50.
- the compound (B1) may contain a molecular group (B 1-1) in which R 1 , R 2 , R 3 , and R 4 are all the short-chain substituent groups ( ⁇ ) in the general formula (b1), or may contain a molecular group (B1-2) in which R 1 , R 2 , R 3 , and R 4 are all the long-chain substituent groups ( ⁇ ), or may contain a molecular group (B1-3) in which part of R 1 , R 2 , R 3 , and R 4 is the short-chain substituent group ( ⁇ ) and the balance is the long-chain substituent group ( ⁇ ).
- the compound (B1) preferably contains the molecular group (B1-3) in which part of R 1 , R 2 , R 3 , and R 4 is the short-chain substituent group ( ⁇ ) and the balance is the long-chain substituent group ( ⁇ ).
- the molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in the molecular group (B1-3) is preferably 0.3 or more, more preferably 0.5 or more, and still more preferably 0.8 or more.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 3.0 or less, more preferably 2.0 or less, and still more preferably 1.5 or less. Upper limit values and lower limit values of these numerical ranges can be freely combined.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 0.3 to 3.0, more preferably 0.5 to 2.0, and still more preferably 0.8 to 1.5.
- a content of the molecular group (B1-3) in the compound (B1) is preferably 10 mol% or more, more preferably 15 mol% or more, and still more preferably 20 mol% or more, based on the total amount of the compound (B1).
- the content of the molecular group (B1-3) in the compound (B1) is preferably 40 mol% or less, more preferably 35 mol% or less, and still more preferably 30 mol% or less. Upper limit values and lower limit values of these numerical ranges can be freely combined.
- the content of the molecular group (B1-3) in the compound (B1) is preferably 10 mol% to 40 mol%, more preferably 15 mol% to 35 mol%, and still more preferably 20 mol% to 30 mol%.
- the compound (B 1) further contains the molecular group (B 1-2) in which R 1 , R 2 , R 3 , and R 4 are all the long-chain substituent groups ( ⁇ ).
- a content of the molecular group (B 1-2) in the compound (B 1) is preferably 50 mol% or more, more preferably 55 mol% or more, and still more preferably 60 mol% or more, based on the total amount of the compound (B1).
- the content of the molecular group (B 1-2) in the compound (B 1) is preferably 75 mol% or less, more preferably 70 mol% or less, and still more preferably 65 mol% or less. Upper limit values and lower limit values of these numerical ranges can be freely combined.
- the content of the molecular group (B1-2) in the compound (B1) is preferably 50 mol% to 75 mol%, more preferably 55 mol% to 70 mol%, and still more preferably 60 mol% to 65 mol%.
- a total content of the molecular group (B 1-2) and the molecular group (B 1-3) in the compound (B1) is preferably 80 mol% or more, and more preferably 85 mol% or more, based on the total amount of the compound (B1).
- the total content of the molecular group (B1-2) and the molecular group (B1-3) in the compound (B1) is preferably 100 mol% or less, more preferably 95 mol% or less, and still more preferably 90 mol% or less.
- Upper limit values and lower limit values of these numerical ranges can be freely combined.
- the total content of the molecular group (B1-2) and the molecular group (B1-3) in the compound (B1) is preferably 80 mol% to 100 mol%, more preferably 85 mol% to 95 mol%, and still more preferably 85 mol% to 90 mol%.
- a content of the compound (B1) in the molybdenum-based friction modifier (B) is preferably 80 mass% to 100 mass%, more preferably 90 mass% to 100 mass%, and still more preferably 95 mass% to 100 mass%, based on the total amount of the molybdenum-based friction modifier (B).
- a content of the molybdenum-based friction modifier (B) is preferably 0.30 mass% or more, more preferably 0.40 mass% or more, still more preferably 0.50 mass% or more, and even more preferably 0.60 mass% or more, based on the total amount of the lubricating oil composition.
- the content of the molybdenum-based friction modifier (B) is preferably 1.50 mass% or less, more preferably 1.25 mass% or less, and still more preferably 1.00 mass% or less.
- the content of the molybdenum-based friction modifier (B) is preferably 0.30 mass% to 1.50 mass%, more preferably 0.40 mass% to 1.25 mass%, still more preferably 0.50 mass% to 1.00 mass%, and even more preferably 0.60 mass% to 1.00 mass%.
- a content of molybdenum atoms derived from the molybdenum-based friction modifier (B) is preferably 0.04 mass% or more, more preferably 0.05 mass% or more, still more preferably 0.06 mass% or more, and even more preferably 0.07 mass% or more, based on the total amount of the lubricating oil composition.
- the content of molybdenum atoms derived from the molybdenum-based friction modifier (B) is preferably 0.18 mass% or less, more preferably 0.15 mass% or less, and still more preferably 0.12 mass% or less.
- the content of molybdenum atoms derived from the molybdenum-based friction modifier (B) is preferably 0.04 mass% to 0.18 mass%, more preferably 0.05 mass% to 0.15 mass%, still more preferably 0.06 mass% to 0.12 mass%, and even more preferably 0.07 mass% to 0.12 mass%.
- the lubricating oil composition according to the present embodiment contains the benzotriazole-based compound (C).
- the lubricating oil composition does not contain the benzotriazole-based compound (C)
- the lubricating oil composition is poor in copper corrosion resistance.
- the content of the benzotriazole-based compound (C) should be 0.03 mass% or less based on the total amount of the lubricating oil composition.
- the content of the benzotriazole-based compound (C) is more than 0.03 mass% based on the total amount of the lubricating oil composition, the effect of improving the fuel efficiency of the lubricating oil composition is not exhibited.
- the content of the benzotriazole-based compound (C) is preferably 0.02 mass% or less, and more preferably 0.015 mass% or less, based on the total amount of the lubricating oil composition.
- the content of the benzotriazole-based compound (C) is preferably 0.003 mass% or more, and more preferably 0.005 mass% or more, based on the total amount of the lubricating oil composition.
- the content of the benzotriazole-based compound (C) is preferably 0.003 mass% to 0.02 mass%, and more preferably 0.005 mass% to 0.015 mass%.
- benzotriazole-based compound (C) one or more kinds selected from benzotriazole-based compounds used in the related art as a metal deactivator can be used without particular limitation.
- the benzotriazole-based compound (C) preferably contains a compound (C1) represented by the following general formula (c1).
- R c1 is an alkyl group having 1 to 4 carbon atoms.
- This alkyl group may be linear or branched.
- the number of carbon atoms in this alkyl group is preferably 1 to 3, more preferably 1 to 2, and still more preferably 1.
- p is an integer of 0 to 4.
- the multiple R c1 's may be same as or different from each other.
- p is preferably 0 to 3, more preferably 0 to 2, and still more preferably 1.
- R c2 is a methylene group or an ethylene group.
- R c2 is preferably a methylene group.
- R c3 and R c4 are each independently a hydrogen atom or an alkyl group having 1 to 18 carbon atoms.
- This alkyl group may be linear or branched, and is preferably branched from the viewpoint of more easily exhibiting the effects of the present invention.
- the number of carbon atoms in the alkyl group is preferably 2 to 14, more preferably 4 to 12, and still more preferably 6 to 10.
- a content of the compound (C 1) in the benzotriazole-based compound (C) is preferably 50 mass% to 100 mass%, more preferably 60 mass% to 100 mass%, still more preferably 70 mass% to 100 mass%, even more preferably 80 mass% to 100 mass%, yet still more preferably 90 mass% to 100 mass%, and still even more preferably 95 mass% to 100 mass%, based on the total amount of the benzotriazole-based compound (C).
- a content ratio [(B)/(C)] of the molybdenum-based friction modifier (B) to the benzotriazole-based compound (C) is, in mass ratio, preferably 20 or more, more preferably 30 or more, still more preferably 40 or more, even more preferably 50 or more, and yet still more preferably 60 or more.
- the content ratio [(B)/(C)] is preferably 120 or less, more preferably 110 or less, still more preferably 100 or less, even more preferably 90 or less, and yet still more preferably 80 or less.
- Upper limit values and lower limit values of these numerical ranges can be freely combined.
- the content ratio [(B)/(C)] is preferably 20 to 120, more preferably 30 to 110, still more preferably 40 to 100, even more preferably 50 to 90, and yet still more preferably 60 to 80.
- the lubricating oil composition according to the present embodiment may contain lubricating oil additives other than the components (B) and (C) within the range that does not impair the effects of the present invention.
- Examples of the other lubricating oil additives include a viscosity index improver, a pour point depressant, a metal-based detergent, an ashless dispersant, an antioxidant, an anti-wear agent, an extreme pressure agent, a rust inhibitor, an anti-foaming agent, a demulsifier, a dissolution aid, and an ash-free friction modifier, and the viscosity index improver, the pour point depressant, the metal-based detergent, the ashless dispersant, the antioxidant, the anti-wear agent, and the extreme pressure agent are preferred.
- lubricating oil additives can be used alone or may be used in combination of two or more thereof.
- Each content of these lubricating oil additives can be appropriately adjusted within the range that does not impair the effects of the present invention, and is independently usually 0.001 mass% to 15 mass%, preferably 0.005 mass% to 10 mass%, more preferably 0.01 mass% to 8 mass%, and still more preferably 0.1 mass% to 6 mass%, based on the total amount (100 mass%) of the lubricating oil composition.
- the lubricating oil composition according to the present embodiment may or may not contain a viscosity index improver.
- the viscosity index improver examples include: a PMA-based viscosity index improver such as a non-dispersed polyalkyl (meth)acrylate and a dispersed polyalkyl (meth)acrylate; an OCP-based viscosity index improver such as an olefin-based copolymer (for example, an ethylene-propylene copolymer) and a dispersed olefin-based copolymer; and a styrene-based copolymer (for example, a styrene-diene copolymer and a styrene-isoprene copolymer).
- a PMA-based viscosity index improver such as a non-dispersed polyalkyl (meth)acrylate and a dispersed polyalkyl (meth)acrylate
- an OCP-based viscosity index improver such as an olefin-based copolymer (for
- (meth)acrylate means acrylate or methacrylate.
- a mass average molecular weight (Mw) of the viscosity index improver is preferably 5,000 or more to 1,500,000 or less.
- the mass average molecular weight (Mw) is preferably 20,000 or more and more preferably 100,000 or more, and is preferably 1,000,000 or less and more preferably 800,000 or less.
- the mass average molecular weight (Mw) is preferably 10,000 or more and more preferably 20,000 or more, and is preferably 800,000 or less and more preferably 500,000 or less.
- the mass average molecular weight (Mw) of each component is a value in terms of standard polystyrene measured by gel permeation chromatography (GPC).
- a structure of the viscosity index improver may be linear or branched.
- the viscosity index improver may be a polymer having a specific structure, such as a comb polymer that has a structure having, on the main chain, a large number of trifurcation points, from each of which a high-molecular weight side chain is started, and a star polymer that is a type of branched polymer and that has a structure having three or more linear polymer chains bonded at one point.
- the viscosity index improver may be used alone or may be used in combination of two or more thereof.
- the viscosity index improver contains, for example, the above-mentioned polymer as a resin component, and in consideration of the handling properties and the solubility in the above-mentioned base oil, the viscosity index improver is usually commercially available in a form of a solution obtained by diluting a polymer-containing resin component with a diluent such as a mineral oil.
- a content of the viscosity index improver in terms of a resin component is preferably 0.1 mass% to 2.6 mass%, more preferably 0.2 mass% to 1.0 mass%, and still more preferably 0.3 mass% to 0.7 mass%, based on the total amount of the lubricating oil composition.
- the lubricating oil composition according to the present embodiment preferably contains a pour point depressant.
- pour point depressant examples include an ethylene-vinyl acetate copolymer, a condensate of chlorinated paraffin and naphthalene, a condensate of chlorinated paraffin and phenol, a polymethacrylate-based pour point depressant (PMA-based pour point depressant, such as a polyalkyl (meth)acrylate), polyvinyl acetate, polybutene, and polyalkylstyrene.
- PMA-based pour point depressant such as a polyalkyl (meth)acrylate
- the polymethacrylate-based pour point depressant is preferably used.
- pour point depressants may be used alone or may be used in combination of two or more thereof.
- a content of the pour point depressant in terms of a resin component is preferably 0.01 mass% to 0.12 mass%, more preferably 0.03 mass% to 0.09 mass%, and still more preferably 0.05 mass% to 0.07 mass%, based on the total amount of the lubricating oil composition.
- the lubricating oil composition according to the present embodiment preferably contains a metal-based detergent.
- the metal-based detergent When the lubricating oil composition contains the metal-based detergent, the formation of deposits inside the engine during high-temperature operation can be reduced and sludge accumulation can be prevented to keep the engine clean, acidic substances caused by engine oil deterioration and the like can be neutralized, and corrosion and wear can be prevented.
- the metal-based detergent examples include an organic acid metal salt compound containing a metal atom selected from an alkali metal and an alkaline earth metal, and specific examples thereof include a metal salicylate, a metal phenate, and a metal sulfonate each containing a metal atom selected from an alkali metal and an alkaline earth metal.
- alkali metal means sodium and potassium.
- alkaline earth metal means magnesium, calcium, strontium, and barium.
- the metal atom contained in the metal-based detergent is preferably an alkaline earth metal, and among the alkaline earth metal, the metal atom is preferably magnesium and calcium, and more preferably calcium.
- the metal salicylate is preferably a compound represented by the following general formula (d1-1), the metal phenate is preferably a compound represented by the following general formula (d1-2), and the metal sulfonate is preferably a compound represented by the general formula (d1-3).
- M is a metal atom selected from an alkali metal and an alkaline earth metal, and is preferably an alkaline earth metal, and more preferably magnesium or calcium.
- M E is an alkaline earth metal, and preferably magnesium or calcium.
- R d1 's are each independently a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms.
- q is an integer of 0 or more, preferably an integer of 0 to 3, and more preferably 1 or 2.
- Examples of the hydrocarbon group which can be selected as R d1 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 carbon atoms, an aryl group having 6 to 18 ring carbon atoms, an alkylaryl group having 7 to 18 carbon atoms, and an arylalkyl group having 7 to 18 carbon atoms.
- the metal-based detergent may be used alone or may be used in combination of two or more thereof.
- the metal-based detergent is preferably one or more selected from alkaline earth metal sulfonates, more preferably one or more selected from magnesium sulfonate and calcium sulfonate, and still more preferably calcium sulfonate.
- the metal-based detergent may be any of a neutral salt, a basic salt, an overbased salt, and a mixture thereof.
- a base number of the metal-based detergent is preferably 0 mgKOH/g to 600 mgKOH/g.
- the metal-based detergent may be neutral, basic, or overbased, and is preferably basic or overbased, and more preferably overbased, from the viewpoint of improving the detergency of the lubricating oil composition.
- the base number is preferably 150 mgKOH/g or more, more preferably 200 mgKOH/g or more, and still more preferably 250 mgKOH/g or more.
- the base number is preferably 600 mgKOH/g or less, more preferably 500 mgKOH/g or less, and still more preferably 450 mgKOH/g or less. Upper limit values and lower limit values of these numerical ranges can be freely combined.
- the base number is preferably 150 mgKOH/g to 600 mgKOH/g, more preferably 200 mgKOH/g to 500 mgKOH/g, and still more preferably 250 mgKOH/g to 450 mgKOH/g.
- base number means a value measured by a potentiometric titration method (base number/perchloric acid method) in accordance with JIS K2501:2003-9.
- a content of the metal atoms (alkali metal atom and alkaline earth metal atom) derived from the metal-based detergent is preferably 750 ppm by mass to 4,000 ppm by mass, more preferably 1,100 ppm by mass to 3,000 ppm by mass, and still more preferably 1,500 ppm by mass to 2,000 ppm by mass, based on the total amount of the lubricating oil composition.
- a content of the metal-based detergent may be adjusted such that the content of the metal atoms (alkali metal atom and alkaline earth metal atom) derived from the metal-based detergent satisfies the above range.
- the content of the metal-based detergent is preferably 0.5 mass% to 4.0 mass%, more preferably 0.7 mass% to 3.0 mass%, and still more preferably 1.0 mass% to 2.0 mass%, based on the total amount of the lubricating oil composition.
- the lubricating oil composition according to the present embodiment preferably contains an ashless dispersant.
- the lubricating oil composition contains the ashless dispersant, sludge and the like generated at a relatively low temperature can be dispersed in the oil to keep the inside of the engine clean.
- ashless dispersant examples include boron-free succinimides such as boron-free alkenyl succinimides, boron-containing succinimides such as boron-containing alkenyl succinimides, benzylamines, boron-containing benzylamines, succinic acid esters, and mono- or di-carboxylic acid amides represented by fatty acids or succinic acids.
- one or more succinimides selected from the boron-free alkenyl succinimides and the boron-containing alkenyl succinimides are preferred, and combined use of the boron-free alkenyl succinimide and the boron-containing alkenyl succinimide is more preferred.
- a content of nitrogen atoms derived from the ashless dispersant is preferably 0.01 mass% to 0.10 mass%, more preferably 0.02 mass% to 0.08 mass%, and still more preferably 0.03 mass% to 0.07 mass%, based on the total amount of the lubricating oil composition.
- a content of the ashless dispersant may be adjusted such that the content of the nitrogen atoms derived from the ashless dispersant satisfies the above range.
- the content of the ashless dispersant is preferably 1.0 mass% to 6.0 mass%, more preferably 2.0 mass% to 5.0 mass%, and still more preferably 3.0 mass% to 4.0 mass%, based on the total amount of the lubricating oil composition.
- antioxidants examples include an amine-based antioxidant, a phenol-based antioxidant, a sulfur-based antioxidant, and a phosphorus-based antioxidant.
- amine-based antioxidant or the phenol-based antioxidant
- phenol-based antioxidant it is preferable to use the amine-based antioxidant or the phenol-based antioxidant, and it is more preferable to use the amine-based antioxidant and the phenol-based antioxidant in combination.
- amine-based antioxidant examples include: a diphenylamine-based antioxidant such as diphenylamine and an alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms; and a naphthylamine-based antioxidant such as ⁇ -naphthylamine and an alkyl-substituted phenyl- ⁇ -naphthylamine having 3 to 20 carbon atoms.
- a diphenylamine-based antioxidant such as diphenylamine and an alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms
- naphthylamine-based antioxidant such as ⁇ -naphthylamine and an alkyl-substituted phenyl- ⁇ -naphthylamine having 3 to 20 carbon atoms.
- phenol-based antioxidant examples include: a monophenol-based antioxidant such as 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, and octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate; a diphenol-based antioxidant such as 4,4'-methylenebis(2,6-di-tert-butylphenol) and 2,2'-methylenebis(4-ethyl-6-tert-butylphenol); and a hindered phenol-based antioxidant.
- a monophenol-based antioxidant such as 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, and octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate
- diphenol-based antioxidant such as 4,4'-
- Examples of the anti-wear agent or the extreme pressure agent include a zinc dialkyldithiophosphate (ZnDTP), zinc phosphate, zinc dithiocarbamate, a sulfur-containing compound such as a disulfide compound, a sulfurized olefin compound, sulfurized fats and oils, a sulfurized ester compound, a thiocarbonate compound, a thiocarbamate compound, and a polysulfide compound, a phosphorus-containing compound such as a phosphite ester compound, a phosphate ester compound, a phosphonate ester compound, and amine salts and metal salts thereof, and a sulfur and phosphorus-containing anti-wear agent, such as a thiophosphite ester compound, a thiophosphate ester compound, a thiophosphonate ester compound, and amine salts and metal salts thereof.
- ZnDTP zinc dialkyldithiophosphate
- ZnDTP
- rust inhibitor examples include a fatty acid, an alkenyl succinic acid half ester, a fatty acid soap, an alkyl sulfonate salt, a polyhydric alcohol fatty acid ester, a fatty acid amine, an oxidized paraffin, and an alkyl polyoxyethylene ether.
- anti-foaming agent examples include a silicone oil, a fluorosilicone oil, and a fluoroalkyl ether.
- the demulsifier examples include: an anionic surfactant such as a castor oil sulfate ester salt and a petroleum sulfonate salt; a cationic surfactant such as a quaternary ammonium salt and imidazolines; polyoxyalkylene polyglycol and an ester of a dicarboxylic acid thereof; and an alkylene oxide adduct of an alkylphenolformaldehyde polycondensate.
- an anionic surfactant such as a castor oil sulfate ester salt and a petroleum sulfonate salt
- a cationic surfactant such as a quaternary ammonium salt and imidazolines
- polyoxyalkylene polyglycol and an ester of a dicarboxylic acid thereof examples include an alkylene oxide adduct of an alkylphenolformaldehyde polycondensate.
- dissolution aid examples include an ester compound such as a fatty acid ester and an aromatic-group-containing compound.
- the compound (B1) contained in the molybdenum-based friction modifier (B) has excellent solubility (oil solubility) and excellent low-temperature storage stability without using a dissolution aid. Therefore, from the viewpoint of improving the solubility of the molybdenum-based friction modifier (B), an amount of the dissolution aid to be used is preferably small.
- a content of the dissolution aid is preferably less than 5 parts by mass, more preferably less than 0.5 parts by mass, and still more preferably less than 0.05 parts by mass, with respect to 100 parts by mass of the molybdenum-based friction modifier (B), and even more preferably, no dissolution aid is contained.
- Examples of the ashless friction modifier include an ester-based friction modifier, an amine-based friction modifier, an amide-based friction modifier, and an ether-based friction modifier.
- the lubricating oil composition according to the present embodiment can have sufficiently improved fuel efficiency without using an ashless friction modifier. Therefore, a content of the ashless friction modifier is preferably small.
- the content of the ashless friction modifier is preferably less than 10 parts by mass, more preferably less than 1.0 parts by mass, still more preferably less than 0.1 parts by mass, and even more preferably less than 0.01 parts by mass, with respect to 100 parts by mass of the molybdenum-based friction modifier (B), and yet still more preferably, no ashless friction modifier is contained.
- the kinematic viscosity at 100°C of the lubricating oil composition according to the present embodiment should be 9.3 mm 2 /s or less.
- the power loss due to the viscosity resistance of the lubricating oil composition makes it difficult to achieve the effect of fuel efficiency improvement.
- the kinematic viscosity at 100°C of the lubricating oil composition is preferably 8.2 mm 2 /s or less, more preferably 7.1 mm 2 /s or less, and still more preferably 6.1 mm 2 /s or less.
- the kinematic viscosity at 100°C of the lubricating oil composition is preferably 3.8 mm 2 /s or more, more preferably 4.0 mm 2 /s or more, and still more preferably 5.0 mm 2 /s or more.
- the HTHS viscosity at 150°C (high temperature high shear viscosity) of the lubricating oil composition according to the present embodiment is preferably 1.7 mPa -s or more.
- the HTHS viscosity at 150°C of the lubricating oil composition according to the present embodiment is preferably less than 2.9 mPa s, more preferably less than 2.6 mPa s, still more preferably less than 2.3 mPa ⁇ s, and even more preferably less than 2.0 mPa ⁇ s.
- the HTHS viscosity at 150°C of the lubricating oil composition is a value measured at a shear rate of 10 6 /s under a temperature condition of 150°C using a TBS high temperature viscometer (tapered bearing simulator viscometer) in accordance with ASTM D4683.
- the lubricating oil composition according to the present embodiment does not generate cloudiness or precipitation in a low-temperature storage stability test described in Examples described later.
- the lubricating oil composition according to the present embodiment has a discoloration number of 1 in a copper plate corrosion test described in Examples described later.
- a copper elution amount after an ISOT test described in Examples described later is preferably 90 ppm by mass or less, more preferably 70 ppm by mass or less, and still more preferably 60 ppm by mass or less, based on the total amount of the lubricating oil composition.
- fuel efficiency improvement with respect to JASO BC (base calibration oil) (FEI% vs JASO BC) in a fuel efficiency test described in Examples described later is preferably 1.05 or more and more preferably 1.10 or more.
- a method for producing the lubricating oil composition according to the present embodiment is not particularly limited.
- the method for producing the lubricating oil composition according to the present embodiment includes a step of mixing the base oil (A), the molybdenum-based friction modifier (B), and the benzotriazole-based compound (C).
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1).
- R 1 , R 2 , R 3 , and R 4 each independently represent a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 13 to 22 carbon atoms.
- a molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in all molecules of the compound (B1) is 0.10 to 0.50.
- X 1 , X 2 , X 3 , and X 4 each independently represent an oxygen atom or a sulfur atom.
- a content of the benzotriazole-based compound (C) is adjusted to be 0.03 mass% or less based on the total amount of the lubricating oil composition.
- a kinematic viscosity at 100°C of the lubricating oil composition is adjusted to be 9.3 mm 2 /s or less.
- a method of mixing the above components is not particularly limited, and examples of the method include a method including a step of blending the components (component (B), component (C), and one or more selected from the above lubricating oil additives) with the base oil (A). At this time, the above other lubricating oil additives may be blended at the same time.
- each component may be blended in a form of a solution (dispersion) upon addition with a diluent oil or the like. It is preferable that after blending the components, the blend is stirred and uniformly dispersed by a known method.
- the lubricating oil composition according to the present embodiment has excellent low-temperature storage stability, excellent copper corrosion resistance, and a high fuel efficiency.
- the lubricating oil composition according to the present embodiment is preferably used in an internal combustion engine, more preferably a gasoline engine, and still more preferably an automobile engine.
- the lubricating oil composition according to the present embodiment provides the following (1) to (3).
- a kinematic viscosity at 40°C, the kinematic viscosity at 100°C, and the viscosity index of a base oil and each of the lubricating oil compositions were measured or calculated in accordance with JIS K2283:2000.
- the HTHS viscosity at 150°C of each of the lubricating oil compositions was measured at a shear rate of 10 6 /s under a temperature condition of 150°C using a TBS high temperature viscometer (tapered bearing simulator viscometer) in accordance with ASTM D4683.
- a molybdenum amount of each of the lubricating oil compositions was measured in accordance with JPI-5S-38-92 .
- a nitrogen amount of each of the lubricating oil compositions was measured in accordance with JIS K2609:1998.
- the mass average molecular weights (Mw) of a viscosity index improver and a pour point depressant were measured using a gel permeation chromatography apparatus ("1260 Type HPLC", manufactured by Agilent Technologies, Inc.) under the following conditions, and a value measured in terms of standard polystyrene was used.
- a base oil and additives shown below were sufficiently mixed in blending amounts (mass%) shown in Table 1 to prepare the lubricating oil compositions in Examples 1 to 3 and Comparative Examples 1 to 8.
- MoDTC-1 is a compound represented by the general formula (b1) in which the aliphatic hydrocarbon group of the short-chain substituent group ( ⁇ ) has 8 carbon atoms and the aliphatic hydrocarbon group of the long-chain substituent group ( ⁇ ) has 13 carbon atoms.
- X 1 , X 2 , X 3 , and X 4 are sulfur atoms.
- the molar ratio [( ⁇ )/( ⁇ )] of the short-chain substituent group ( ⁇ ) to the long-chain substituent group ( ⁇ ) in all molecules of MoDTC-1 is 1.0.
- MoDTC-2 is a compound represented by the general formula (b1) in which the short-chain substituent group ( ⁇ ) is substantially not contained and the long-chain substituent group ( ⁇ ) whose aliphatic hydrocarbon group has 13 carbon atoms is substantially contained.
- X 1 , X 2 , X 3 , and X 4 are sulfur atoms.
- MoDTC-3 is a compound represented by the general formula (b1) in which the long-chain substituent group ( ⁇ ) is substantially not contained and the short-chain substituent group ( ⁇ ) whose aliphatic hydrocarbon group has 8 carbon atoms is substantially contained.
- X 1 , X 2 , X 3 , and X 4 are sulfur atoms.
- This compound is represented by the following structural formula.
- 1-[N,N-bis(2-ethylhexyl)aminomethyl]-4-methyl-1H-benzotriazole is a compound represented by the general formula (c1) in which R c1 is a methyl group, p is 1, R c2 is a methylene group, and R c3 and R c4 are 2-ethylhexyl groups, and is a compound corresponding to the compound (C 1).
- Polymethacrylate (PMA) (mass average molecular weight (Mw): 310,000, resin component: 22.7 mass%)
- Mw mass average molecular weight
- resin component 22.7 mass%
- An addition amount was 1.5 mass% (resin component: 0.34 mass%, diluent oil: 1.16 mass%) based on the total amount of the lubricating oil composition.
- Polymethacrylate (PMA) (mass average molecular weight (Mw): 62,000, resin component: 55.0 mass%) An addition amount was 0.1 mass% (resin component: 0.06 mass%, diluent oil: 0.04 mass%) based on the total amount of the lubricating oil composition.
- Calcium sulfonate (base number: 305 mgKOH/g) Calcium sulfonate was added such that a content of calcium atoms derived from calcium sulfonate in the lubricating oil composition was 0.16 mass%.
- Succinimide (nitrogen content: 1.4 mass%) Succinimide was added such that a content of nitrogen atoms derived from succinimide in the lubricating oil composition was 0.05 mass%.
- a lubricating oil composition in which neither the cloudiness nor the precipitation occurred was evaluated to be acceptable.
- Test method 1 copper plate corrosion test
- a copper plate corrosion test was performed in accordance with JIS K2513:2000 (petroleum products-copper plate corrosion test method-) to evaluate the copper corrosion resistance of the lubricating oil compositions in Examples 1 to 3 and Comparative Examples 1 to 8.
- Test method 2 evaluation of copper elution after ISOT test
- a copper piece and an iron piece were put into a test oil (each of the lubricating oil compositions in Examples 1 to 3 and Comparative Examples 1 to 8) as a catalyst, and an ISOT test in accordance with JIS K2514-1:2013 was performed at a temperature of 165.5°C for 72 hours to forcibly deteriorate the test oil. Then, a copper concentration in the forcibly deteriorated test oil was measured in accordance with JPI-5S-44-11 , and the measured copper concentration was taken as the copper elution amounts after the ISOT test.
- a lubricating oil composition having a discoloration number of "1" and a copper elution amount after the ISOT test of 90 ppm by mass or less was evaluated to be acceptable.
- a lubricating oil composition having a "FEI% vs JASO BC" of 1.05 or more was evaluated to be acceptable.
- the lubricating oil compositions in Examples 1 to 3 are excellent in all of the low-temperature storage stability, the copper corrosion resistance, and the fuel efficiency.
- a lubricating oil composition which contains, as a molybdenum-based friction modifier, a compound substantially free of the short-chain substituent group ( ⁇ ) and substantially composed of the long-chain substituent group ( ⁇ ) (that is, a compound having a molar ratio [( ⁇ )/( ⁇ )] of 0.00) and does not contain the benzotriazole-based compound (C) (compound (C1), is poor in copper corrosion resistance and fuel efficiency (Comparative Example 2).
- a lubricating oil composition which contains, as a molybdenum-based friction modifier, a compound having a molar ratio [( ⁇ )/( ⁇ )] of more than 0.50 (1.00) and does not contain the benzotriazole-based compound (C) (compound (C1)), is poor in low-temperature storage stability and copper corrosion resistance (Comparative Examples 1 and 3). Moreover, it can be seen that, even in the case of a lubricating oil composition, which contains the above compound and further contains the benzotriazole-based compound (C) (compound (C1)), the copper corrosion resistance is improved and becomes good, but the low-temperature storage stability is poor (Comparative Examples 4 and 6).
- a lubricating oil composition which contains, as a molybdenum-based friction modifier, a compound substantially free of the long-chain substituent group ( ⁇ ) and substantially composed of the short-chain substituent group ( ⁇ ), is poor in low-temperature storage stability.
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| JP2021043791A JP7104200B1 (ja) | 2021-03-17 | 2021-03-17 | 潤滑油組成物 |
| PCT/JP2022/007511 WO2022196274A1 (fr) | 2021-03-17 | 2022-02-24 | Composition lubrifiante |
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| JP5512344B2 (ja) * | 2010-03-23 | 2014-06-04 | 株式会社Ａｄｅｋａ | 内燃機関用潤滑油組成物 |
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| US20240158716A1 (en) | 2024-05-16 |
| CN116997640A (zh) | 2023-11-03 |
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