WO2022196274A1 - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
- Publication number
- WO2022196274A1 WO2022196274A1 PCT/JP2022/007511 JP2022007511W WO2022196274A1 WO 2022196274 A1 WO2022196274 A1 WO 2022196274A1 JP 2022007511 W JP2022007511 W JP 2022007511W WO 2022196274 A1 WO2022196274 A1 WO 2022196274A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lubricating oil
- oil composition
- mass
- compound
- group
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 169
- 239000000314 lubricant Substances 0.000 title abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 92
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 53
- 239000011733 molybdenum Substances 0.000 claims abstract description 52
- 239000012964 benzotriazole Substances 0.000 claims abstract description 47
- -1 benzotriazole compound Chemical class 0.000 claims abstract description 45
- 239000002199 base oil Substances 0.000 claims abstract description 34
- 239000010687 lubricating oil Substances 0.000 claims description 172
- 125000001424 substituent group Chemical group 0.000 claims description 72
- 239000003607 modifier Substances 0.000 claims description 62
- 125000004432 carbon atom Chemical group C* 0.000 claims description 41
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 28
- 125000001931 aliphatic group Chemical group 0.000 claims description 26
- 239000003599 detergent Substances 0.000 claims description 22
- 239000003963 antioxidant agent Substances 0.000 claims description 20
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- 239000002270 dispersing agent Substances 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 125000004434 sulfur atom Chemical group 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 12
- 229910052717 sulfur Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000004090 dissolution Methods 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 38
- 239000010949 copper Substances 0.000 abstract description 38
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 37
- 238000005260 corrosion Methods 0.000 abstract description 29
- 230000007797 corrosion Effects 0.000 abstract description 29
- 239000000446 fuel Substances 0.000 abstract description 24
- 230000000694 effects Effects 0.000 description 25
- 239000003921 oil Substances 0.000 description 25
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 18
- 238000012360 testing method Methods 0.000 description 15
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical class O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 11
- 229910052784 alkaline earth metal Chemical group 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 11
- 229920000193 polymethacrylate Polymers 0.000 description 11
- 229910052791 calcium Inorganic materials 0.000 description 10
- 239000011575 calcium Substances 0.000 description 10
- 150000001342 alkaline earth metals Chemical class 0.000 description 8
- 150000001412 amines Chemical class 0.000 description 7
- 239000002585 base Substances 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 7
- 150000001340 alkali metals Chemical group 0.000 description 6
- 230000003078 antioxidant effect Effects 0.000 description 6
- 125000004429 atom Chemical group 0.000 description 6
- 230000000994 depressogenic effect Effects 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
- 239000002480 mineral oil Substances 0.000 description 6
- 229960002317 succinimide Drugs 0.000 description 6
- 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
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-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
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 239000003085 diluting agent Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- 238000001556 precipitation Methods 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
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 239000003208 petroleum 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
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 150000003939 benzylamines Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical group 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- 239000010705 motor oil Substances 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
- 239000002530 phenolic antioxidant Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 2
- 150000003871 sulfonates Chemical class 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 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
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-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
- 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
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-N Thiophosphoric acid Chemical class OP(O)(S)=O RYYWUUFWQRZTIU-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 229940045714 alkyl sulfonate alkylating agent Drugs 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
- 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
- 239000010700 blended lubricating oil Substances 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
- 150000001732 carboxylic acid derivatives Chemical class 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
- 230000003749 cleanliness Effects 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
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 150000002019 disulfides Chemical class 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
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Substances O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 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
- 230000014759 maintenance of location Effects 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
- 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
- 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
- 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
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 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
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001515 polyalkylene glycol 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
- 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
- 239000002244 precipitate Substances 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
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- 150000003873 salicylate salts Chemical class 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
- 238000003756 stirring Methods 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
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 1
- 150000003558 thiocarbamic acid derivatives Chemical class 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000011282 treatment 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
- 238000005292 vacuum distillation Methods 0.000 description 1
- 239000001993 wax 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
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 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
- 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
- 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
- C10N2030/54—Fuel economy
Definitions
- the present invention relates to lubricating oil compositions.
- Molybdenum-based friction modifiers such as molybdenum dithiocarbamate (hereinafter also referred to as “MoDTC”) have been known to reduce friction (for example, see Patent Document 1). Further, Patent Document 2 proposes MoDTC having excellent oil solubility represented by the following general formula (1).
- R 1 to R 4 are C 11 to C 14 isoalkyl groups.
- X represents an oxygen and/or sulfur atom.
- R 1 -R 4 contain on average more than 98% C 13 .
- a lubricating oil composition containing MoDTC represented by the general formula (1) has excellent storage stability at low temperatures (hereinafter, also referred to as "low temperature storage stability").
- low temperature storage stability haze and precipitates caused by molybdenum-based friction modifiers such as MoDTC occur in lubricating oil compositions, leading to clogging of oil filters and loss of the friction-reducing effect of molybdenum-based friction modifiers. Therefore, it is extremely important to improve the low-temperature storage stability of the lubricating oil composition.
- the MoDTC-blended lubricating oil composition proposed in Patent Document 2 is excellent in low-temperature storage stability, but inferior in copper corrosion resistance.
- a lubricating oil composition with poor copper corrosion resistance has a problem of accelerated deterioration due to copper elution into the oil due to corrosion of copper-based members used in internal combustion engines such as engines. Therefore, the lubricating oil composition is required to have excellent copper corrosion resistance in addition to excellent low-temperature storage stability. In addition, lubricating oil compositions are required to further improve fuel efficiency.
- an object of the present invention is to provide a lubricating oil composition that has excellent low-temperature storage stability, excellent copper corrosion resistance, and high fuel-saving performance.
- copper corrosion resistance means that even when copper-based members are corroded, copper elution into oil is unlikely to occur.
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1), [In the general formula (b1), R 1 , R 2 , R 3 and R 4 are each independently a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a carbon A long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group of numbers 13 to 22 is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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.
- the content of the benzotriazole compound (C) is 0.03% by mass or less based on the total amount of the lubricating oil composition, A lubricating oil composition having a kinematic viscosity at 100° C. of 9.3 mm 2 /s or less.
- [2] A method of using the lubricating oil composition according to the above [1] in an internal combustion engine.
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1), [In the general formula (b1), R 1 , R 2 , R 3 and R 4 are each independently a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a carbon A long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group of numbers 13 to 22 is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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.
- the content of the benzotriazole compound (C) is adjusted to be 0.03% by mass or less based on the total amount of the lubricating oil composition.
- the method for producing a lubricating oil composition wherein in the above step, the lubricating oil composition is adjusted to have a kinematic viscosity at 100° C. of 9.3 mm 2 /s or less.
- a lubricating oil composition that has excellent low-temperature storage stability, excellent copper corrosion resistance, and high fuel-saving performance.
- the lubricating oil composition of this 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).
- each of R 1 , R 2 , R 3 and R 4 is independently 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 of 13-22, is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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.
- the content of the benzotriazole compound (C) is 0.03% by mass or less based on the total amount of the lubricating oil composition.
- the lubricating oil composition of the present embodiment has a kinematic viscosity at 100° C. of 9.3 mm 2 /s or less.
- R 1 , R 2 , R 3 , and R 4 are alkyl groups having 13 carbon atoms, substantially do not contain the short-chain substituent group ( ⁇ ), and the long-chain substituent group
- a lubricating oil composition blended with a compound substantially containing only ( ⁇ ) was investigated.
- a lubricating oil composition containing a benzotriazole-based compound as a metal deactivator was investigated. However, it did not lead to a sufficient improvement in copper corrosion resistance.
- R 1 , R 2 , R 3 , and R 4 are alkyl groups having 8 carbon atoms, substantially free of the long-chain substituent group ( ⁇ ), and short-chain substituents
- ⁇ long-chain substituent group
- 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 benzotriazole-based compound in the lubricating oil composition The inventors have found that the content is important for solving the above-mentioned problems, and have completed the present invention through various studies.
- base oil (A) "molybdenum-based friction modifier (B)”, and “benzotriazole-based compound (C)” are respectively referred to as “component (A)” and “component (B )”, and “component (C)”.
- the total content of component (A), component (B), and component (C) is based on the total amount of the lubricating oil composition, preferably 80% by mass or more, more preferably is 85% by mass or more, more preferably 88% by mass or more.
- the upper limit of the total content of the component (A), the component (B), and the component (C) is the component (A), the component (B), and the component ( It may be adjusted according to the relationship with lubricating oil additives other than C), and is usually less than 100% by mass, preferably 99% by mass or less, more preferably 97% by mass or less, and still more preferably 95% by mass or less.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 80% by mass to less than 100% by mass, more preferably 85% by mass to 99% by mass or less, still more preferably 88% by mass to 97% by mass, and even more preferably 88% by mass to 95% by mass. is.
- the lubricating oil composition according to this embodiment contains a base oil (A).
- a base oil (A) one or more selected from mineral oils and synthetic oils conventionally used as base oils for lubricating oils can be used without particular limitation.
- Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oils, intermediate crude oils, and naphthenic crude oils; distillates obtained by vacuum distillation of these atmospheric residual oils oil; mineral oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining;
- synthetic oils include poly- ⁇ such as ⁇ -olefin homopolymers and ⁇ -olefin copolymers (for example, ⁇ -olefin copolymers having 8 to 14 carbon atoms such as ethylene- ⁇ -olefin copolymers).
- - olefins; isoparaffins; various esters such as polyol esters and dibasic acid esters; various ethers such as polyphenyl ethers; polyalkylene glycols; GTL base oils obtained by isomerizing liquid (GTL wax) and the like can be mentioned.
- the base oil (A) is preferably a base oil classified as Group 2, 3, or 4 in the American Petroleum Institute (API) base oil category.
- mineral oil may be used alone or in combination, or synthetic oil may be used alone or in combination. Also, one or more mineral oils and one or more synthetic oils may be used in combination.
- the 100° C. kinematic viscosity 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, still more preferably 4.0 mm 2 /s to 7.0 mm 2 /s. 0 mm 2 /s to 4.5 mm 2 /s.
- the 100° C. kinematic viscosity of the base oil (A) is 2.0 mm 2 /s or more, evaporation loss of the lubricating oil composition can be easily suppressed. Further, when the 100° C.
- kinematic viscosity of the base oil (A) is 9.0 mm 2 /s or less, the power loss due to the viscous resistance of the lubricating oil composition can be easily suppressed, and the effect of improving fuel efficiency can be easily obtained.
- the 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, from the viewpoint of suppressing viscosity change due to temperature change and improving fuel economy. That's it. Moreover, it is usually 200 or less.
- the 100°C kinematic viscosity and viscosity index of the mixed base oil are preferably within the above ranges.
- the 100°C kinematic viscosity and viscosity index mean values measured or calculated according to JIS K2283:2000.
- the content of the base oil (A) is, from the viewpoint of making it easy to sufficiently secure the usage amounts of the molybdenum-based friction modifier (B) and the benzotriazole-based compound (C), Based on the total amount of the lubricating oil composition, it is preferably 97% by mass or less, more preferably 95% by mass or less, and even more preferably 93% by mass or less.
- the content of the base oil (A) is preferably 75% by mass or more, more preferably 80% by mass or more, based on the total amount of the lubricating oil composition. Preferably, it is 85% by mass or more.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 75% to 97% by mass, more preferably 80% to 95% by mass, still more preferably 85% to 93% by mass.
- the lubricating oil composition of this embodiment contains a molybdenum-based friction modifier (B).
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1).
- each of R 1 , R 2 , R 3 and R 4 is independently 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 of 13-22, is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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 aliphatic hydrocarbon groups having 4 to 12 carbon atoms that can be selected as the short-chain substituent group ( ⁇ ) include alkyl groups having 4 to 12 carbon atoms and alkenyl groups having 4 to 12 carbon atoms. Specifically, for example, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group and dodecenyl group.
- 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, from the viewpoint of making it easier to exhibit the effects of the present invention. , more preferably 7-9.
- Examples of aliphatic hydrocarbon groups having 13 to 22 carbon atoms that can be selected as the long-chain substituent group ( ⁇ ) include alkyl groups having 13 to 22 carbon atoms and alkenyl groups having 13 to 22 carbon atoms. Specifically, for example, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, icosyl group, heneicosyl group, docosyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, oleyl group, nonadecenyl group, icosenyl group, henicosenyl group and docosenyl group.
- 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, from the viewpoint of making it easier to exhibit the effects of the present invention. , more preferably 13-14.
- the compound (B1) represented by the general formula (b1) has a molar ratio [( ⁇ )/ ( ⁇ )] must be between 0.10 and 0.50 as described above. If the molar ratio [( ⁇ )/( ⁇ )] is less than 0.10, the copper corrosion resistance is poor. In addition, the fuel economy performance tends to be easily degraded. If the molar ratio [( ⁇ )/( ⁇ )] exceeds 0.50, the low-temperature storage stability is poor.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 0.15 or more, more preferably 0, from the viewpoint of making it easier to exhibit copper corrosion resistance and improving fuel efficiency. .20 or greater.
- the molar ratio [( ⁇ )/( ⁇ )] is preferably 0.45 or less, more preferably 0.42 or less, and still more preferably 0.40 or less. is.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 0.15 to 0.45, more preferably 0.20 to 0.42, 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, the molar ratio of the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule of the compound (B1) represented by the general formula (b1) [( ⁇ )/( ⁇ ) ] should be in the range of 0.10 to 0.50. Therefore, the compound (B1) includes a molecular group (B1-1) in which all of R 1 , R 2 , R 3 , and R 4 in the general formula (b1) are short-chain substituent groups ( ⁇ ).
- a molecular group (B1-2) in which R 1 , R 2 , R 3 and R 4 are all long-chain substituent groups ( ⁇ ) may be mixed, and R 1 , R 2 A molecular group (B1-3) in which part of , R 3 , and R 4 is the short-chain substituent group ( ⁇ ) and the remainder is the long-chain substituent group ( ⁇ ) may be mixed.
- part of R 1 , R 2 , R 3 , and R 4 is a short-chain substituent group ( ⁇ )
- the molecular group (B1-3) in which the remainder is the long-chain substituent group ( ⁇ ) is mixed is preferably 0.3 or more, more preferably It is 0.5 or more, more preferably 0.8 or more. Also, it is preferably 3.0 or less, more preferably 2.0 or less, and still more preferably 1.5 or less.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 0.3 to 3.0, more preferably 0.5 to 2.0, still more preferably 0.8 to 1.5.
- the content of the molecular group (B1-3) in the compound (B1) is preferably 10 mol% or more, more preferably 15 mol% or more, still more preferably 20 mol% or more, based on the total amount of the compound (B1). is. Also, it is preferably 40 mol % or less, more preferably 35 mol % or less, and still more preferably 30 mol % or less.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 10 mol % to 40 mol %, more preferably 15 mol % to 35 mol %, still more preferably 20 mol % to 30 mol %.
- compound (B1) in addition to molecular group (B1-3), has all of R 1 , R 2 , R 3 and R 4 substituted with long chains. It is preferable that the molecular group (B1-2), which is the group ( ⁇ ), is further mixed.
- the content of the molecular group (B1-2) in the compound (B1) is preferably 50 mol% or more, more preferably 55 mol% or more, still more preferably 60 mol% or more, based on the total amount of the compound (B1). is. Also, it is preferably 75 mol % or less, more preferably 70 mol % or less, and still more preferably 65 mol % or less.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 50 mol % to 75 mol %, more preferably 55 mol % to 70 mol %, still more preferably 60 mol % to 65 mol %.
- the total content of molecular group (B1-2) and molecular group (B1-3) in compound (B1) is preferably 80 mol% or more, more preferably 85 mol, based on the total amount of compound (B1). % or more. Also, it is preferably 100 mol % or less, more preferably 95 mol % or less, and still more preferably 90 mol % or less. The upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 80 mol % to 100 mol %, more preferably 85 mol % to 95 mol %, still more preferably 85 mol % to 90 mol %.
- the content of the compound (B1) in the molybdenum friction modifier (B) is based on the total amount of, preferably 80% by mass to 100% by mass, more preferably 90% by mass to 100% by mass, still more preferably 95% by mass to 100% by mass.
- the content of the molybdenum-based friction modifier (B) is preferably 0.30 based on the total amount of the lubricating oil composition. % by mass or more, more preferably 0.40% by mass or more, still more preferably 0.50% by mass or more, and even more preferably 0.60% by mass or more. Also, it is preferably 1.50% by mass or less, more preferably 1.25% by mass or less, and even more preferably 1.00% by mass or less. The upper and lower limits of these numerical ranges can be combined arbitrarily.
- the content of molybdenum atoms derived from the molybdenum-based friction modifier (B) is preferably based on the total amount of the lubricating oil composition. is 0.04% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.06% by mass or more, and even more preferably 0.07% by mass or more. Also, it is preferably 0.18% by mass or less, more preferably 0.15% by mass or less, and still more preferably 0.12% by mass or less. The upper and lower limits of these numerical ranges can be combined arbitrarily.
- 0.04% by mass to 0.18% by mass preferably 0.05% by mass to 0.15% by mass, still more preferably 0.06% by mass to 0.12% by mass, more More preferably, it is 0.07% by mass to 0.12% by mass.
- the lubricating oil composition of this embodiment contains a benzotriazole compound (C). If the lubricating oil composition does not contain the benzotriazole-based compound (C), the lubricating oil composition will be inferior in copper corrosion resistance.
- the content of the benzotriazole compound (C) is required to be 0.03% by mass or less based on the total amount of the lubricating oil composition. When the content of the benzotriazole-based compound (C) is more than 0.03% by mass based on the total amount of the lubricating oil composition, the effect of improving the fuel economy of the lubricating oil composition is no longer exhibited.
- the content of the benzotriazole-based compound (C) is preferably based on the total amount of the lubricating oil composition, from the viewpoint of making it easier to exhibit the effect of improving the fuel economy of the lubricating oil composition. is 0.02% by mass or less, more preferably 0.015% by mass or less.
- the content of the benzotriazole compound (C) is preferably 0.003% by mass or more, more preferably 0.003% by mass or more, based on the total amount of the lubricating oil composition. 005% by mass or more.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 0.003 mass % to 0.02 mass %, more preferably 0.005 mass % to 0.015 mass %.
- the benzotriazole-based compound (C) one or more selected from benzotriazole-based compounds conventionally used as metal deactivators can be used without particular limitation.
- the benzotriazole-based compound (C) preferably contains a compound (C1) represented by the following general formula (c1) from the viewpoint of making it easier to exhibit the effects of the present invention.
- R c1 is an alkyl group having 1 to 4 carbon atoms.
- the alkyl group may be linear or branched.
- the number of carbon atoms in the alkyl group is preferably 1 to 3, more preferably 1 to 2, and still more preferably 1, from the viewpoint of making it easier to exhibit the effects of the present invention.
- p is an integer of 0-4.
- the plurality of R c1 may be the same or different.
- p is preferably 0 to 3, more preferably 0 to 2, and still more preferably 1 from the viewpoint of making it easier to exhibit the effects of the present invention.
- R c2 is a methylene group or an ethylene group.
- R c2 is preferably a methylene group from the viewpoint of making it easier to exhibit the effects of the present invention.
- R c3 and R c4 are each independently a hydrogen atom or an alkyl group having 1 to 18 carbon atoms.
- the alkyl group may be linear or branched, but is preferably branched from the viewpoint of making it easier to exhibit the effects of the present invention. Further, from the viewpoint of making it easier to exhibit the effects of the present invention, the number of carbon atoms in the alkyl group is preferably 2-14, more preferably 4-12, and still more preferably 6-10.
- the content of the compound (C1) in the benzotriazole compound (C) is preferably 50 mass based on the total amount of the benzotriazole compound (C). % to 100% by mass, more preferably 60% to 100% by mass, still more preferably 70% to 100% by mass, even more preferably 80% to 100% by mass, still more preferably 90% to 100% by mass %, more preferably 95% to 100% by weight.
- the mass ratio is preferably 20 or more, more preferably 30 or more, still more preferably 40 or more, even more preferably 50 or more, and even more preferably 60 or more. Also, it is preferably 120 or less, more preferably 110 or less, even more preferably 100 or less, even more preferably 90 or less, and even more preferably 80 or less.
- the upper and lower limits of these numerical ranges can be combined arbitrarily. Specifically, it is preferably 20-120, more preferably 30-110, even more preferably 40-100, even more preferably 50-90, and even more preferably 60-80.
- the lubricating oil composition of the present embodiment may contain other lubricating oil additives that do not correspond to the components (B) and (C) within the range that does not impair the effects of the present invention.
- Other lubricating oil additives include, for example, viscosity index improvers, pour point depressants, metallic detergents, ashless dispersants, antioxidants, antiwear agents, extreme pressure agents, rust inhibitors, antifoaming agents. agents, demulsifiers, solubilizers, and ashless friction modifiers, preferably viscosity index improvers, pour point depressants, metallic detergents, ashless dispersants, antioxidants, Wear agents, extreme pressure agents, and the like. These lubricating oil additives may be used singly or in combination of two or more.
- Each content of these lubricating oil additives can be appropriately adjusted within a range that does not impair the effects of the present invention, but based on the total amount (100% by mass) of the lubricating oil composition, each independently , usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, more preferably 0.01 to 8% by mass, still more preferably 0.1 to 6% by mass.
- Viscosity index improver The lubricating oil composition of the present embodiment may or may not contain a viscosity index improver.
- Viscosity index improvers include, for example, non-dispersed polyalkyl (meth)acrylate, PMA-based dispersant polyalkyl (meth)acrylate; type olefin copolymers; styrene copolymers (eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.);
- styrene copolymers eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.
- (meth)acrylate means acrylate or methacrylate.
- the viscosity index improver preferably has a weight average molecular weight (Mw) of 5,000 or more and 1,500,000 or less, and in the case of a PMA type, preferably 20,000 or more, more preferably 100,000 or more. Also, it is preferably 1,000,000 or less, more preferably 800,000 or less. In the case of an OCP system, it is preferably 10,000 or more, more preferably 20,000 or more, and preferably 800,000 or less, more preferably 500,000 or less.
- Mw weight average molecular weight
- the mass average molecular weight (Mw) of each component is a value converted to standard polystyrene measured by gel permeation chromatography (GPC).
- the structure of the viscosity index improver may be linear or branched.
- a comb-shaped polymer having a structure with many trigeminal branch points in the main chain from which high-molecular-weight side chains come out and a type of branched polymer in which three or more chain-like polymers are bonded at one point It may also be a polymer with a specific structure, such as a structured star polymer.
- a viscosity index improver may be used individually by 1 type, and may be used in combination of 2 or more type.
- the viscosity index improver contains, for example, the above-mentioned polymer as a resin component. It is often marketed in the form of a solution diluted with a diluent.
- the content of the viscosity index improver is preferably 0.1 based on the total amount of the lubricating oil composition in terms of resin content. % to 2.6% by mass, more preferably 0.2% to 1.0% by mass, and even more preferably 0.3% to 0.7% by mass.
- the lubricating oil composition of the present embodiment preferably contains a pour point depressant.
- pour point depressants include ethylene-vinyl acetate copolymers, condensates of chlorinated paraffin and naphthalene, condensates of chlorinated paraffin and phenol, polymethacrylates (PMA; polyalkyl (meth)acrylates etc.), polyvinyl acetate, polybutene, polyalkylstyrene, etc., and polymethacrylates are preferably used.
- PMA polyalkyl (meth)acrylates etc.
- polyvinyl acetate, polybutene, polyalkylstyrene, etc. and polymethacrylates are preferably used.
- These pour point depressants may be used alone or in combination of two or more.
- the content of the pour point depressant is preferably 0.01 based on the total amount of the lubricating oil composition as a content in terms of resin content. % to 0.12% by mass, more preferably 0.03% to 0.09% by mass, still more preferably 0.05% to 0.07% by mass.
- the lubricating oil composition of the present embodiment preferably contains a metallic detergent.
- a metallic detergent By containing a metallic detergent in the lubricating oil composition, it suppresses the formation of deposits inside the engine during high-temperature operation, prevents the accumulation of sludge, keeps the inside of the engine clean, and prevents deterioration of the engine oil. The resulting acidic substances can be neutralized and corrosive wear can be prevented.
- metal-based detergents include organic acid metal salt compounds containing metal atoms selected from alkali metals and alkaline earth metals, and specifically, metal atoms selected from alkali metals and alkaline earth metals. containing metal salicylates, metal phenates, and metal sulfonates.
- an "alkali metal” refers to sodium and potassium.
- alkaline earth metal refers to magnesium, calcium, strontium, and barium. From the viewpoint of improving detergency at high temperatures, the metal atoms contained in the metal-based detergent are preferably alkaline earth metals, among alkaline earth metals, magnesium and calcium are preferred, and calcium is more preferred.
- 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: Compounds represented by general formula (d1-3) are preferred.
- M is a metal atom selected from alkali metals and alkaline earth metals, preferably alkaline earth metals, and more preferably magnesium or calcium.
- M E is an alkaline earth metal, preferably magnesium or calcium.
- p is the valence of M and is 1 or 2;
- Each R d1 is 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, more preferably 1 or 2.
- Hydrocarbon groups that can be selected as R d1 include, for example, alkyl groups having 1 to 18 carbon atoms, alkenyl groups having 1 to 18 carbon atoms, cycloalkyl groups having 3 to 18 ring carbon atoms, and 6 to 6 ring carbon atoms. 18 aryl groups, alkylaryl groups having 7 to 18 carbon atoms, arylalkyl groups having 7 to 18 carbon atoms, and the like.
- the metal-based detergents may be used singly or in combination of two or more.
- the metallic detergent is preferably one or more selected from alkaline earth metal sulfonates, and magnesium sulfonate. More preferably one or more selected from phosphate and calcium sulfonate, and more preferably calcium sulfonate.
- the metallic detergent may be neutral salts, basic salts, overbased salts and mixtures thereof.
- the base number of the metallic detergent is preferably 0 to 600 mgKOH/g.
- the metallic detergent may be neutral, basic, or overbased. and more preferably overbased.
- the base number is preferably 150 mgKOH/g or more, more preferably 200 mgKOH/g or more, still more preferably 250 mgKOH/g or more.
- it is preferably 600 mgKOH/g or less, more preferably 500 mgKOH/g or less, still more preferably 450 mgKOH/g or less.
- the upper and lower limits of these numerical ranges can be combined arbitrarily.
- base number means a value measured by potentiometric titration (base number/perchloric acid method) in accordance with 9 of JIS K2501:2003.
- the content of metal atoms (alkali metal atoms, alkaline earth metal atoms) derived from the metallic detergent is based on the total amount of the lubricating oil composition. , preferably 750 mass ppm to 4,000 mass ppm, more preferably 1,100 mass ppm to 3,000 mass ppm, still more preferably 1,500 mass ppm to 2,000 mass ppm.
- the content of the metallic detergent is the number of metal atoms (alkali metal atoms, alkaline earth metal atoms) derived from the metallic detergent. The content may be adjusted so as to satisfy the above range.
- the content of the metallic detergent is based on the total amount of the lubricating oil composition, preferably 0.5% by mass to 4.0% by mass, more preferably 0.7% by mass to 3.0% by mass, still more preferably It is 1.0% by mass to 2.0% by mass.
- the lubricating oil composition of the present embodiment preferably contains an ashless dispersant.
- an ashless dispersant in the lubricating oil composition, sludge and the like generated at relatively low temperatures can be dispersed in the oil to keep the inside of the engine clean.
- ashless dispersants include boron-free succinimides such as boron-free alkenyl succinimide, boron-containing succinimides such as boron-containing alkenyl succinimide, benzylamines, boron-containing benzylamines, Examples include succinic acid esters, fatty acids, and monovalent or divalent carboxylic acid amides represented by succinic acid. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- one or more succinimides selected from boron-free alkenyl succinimides and boron-containing alkenyl succinimides are preferable from the viewpoint of improving cleanliness inside the engine, and boron-free alkenyl succinimides and boron-containing alkenyl succinimide are more preferably used in combination.
- the content of nitrogen atoms derived from the ashless dispersant is preferably 0.01% by mass based on the total amount of the lubricating oil composition. ⁇ 0.10 mass%, more preferably 0.02 mass% to 0.08 mass%, still more preferably 0.03 mass% to 0.07 mass%.
- the content of the ashless dispersant is such that the content of nitrogen atoms derived from the ashless dispersant satisfies the above range.
- the content of the ashless dispersant is preferably 1.0% by mass to 6.0% by mass, more preferably 2.0% by mass to 5.0% by mass, and still more preferably based on the total amount of the lubricating oil composition. is 3.0% by mass to 4.0% by mass.
- antioxidants examples include amine-based antioxidants, phenol-based antioxidants, sulfur-based antioxidants, and phosphorus-based antioxidants. These may be used individually by 1 type, and may be used in combination of 2 or more type. Among these, it is preferable to use an amine-based antioxidant and a phenol-based antioxidant, and it is more preferable to use an amine-based antioxidant and a phenol-based antioxidant together.
- amine-based antioxidants examples include diphenylamine-based antioxidants such as diphenylamine and alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms; ⁇ -naphthylamine and alkyl-substituted phenyl- ⁇ -naphthylamine having 3 to 20 carbon atoms.
- Phenolic antioxidants include, for example, 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, octadecyl-3-(3,5-di monophenolic antioxidants such as -tert-butyl-4-hydroxyphenyl)propionate; 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,2'-methylenebis(4-ethyl-6 -tert-butylphenol); and hindered phenol antioxidants.
- Anti-wear agent or extreme pressure agent examples include zinc dialkyldithiophosphate (ZnDTP), zinc phosphate, zinc dithiocarbamate, disulfides, sulfurized olefins, sulfurized fats and oils, sulfurized esters, thiocarbonates, and thiocarbamates. , sulfur-containing compounds such as polysulfides; phosphorus-containing compounds such as phosphites, phosphates, phosphonates, and their amine salts or metal salts; thiophosphites, thiophosphates , thiophosphonate esters, and amine or metal salts thereof. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- ZnDTP zinc dialkyldithiophosphate
- ZnDTP zinc dialkyldithiophosphate
- zinc phosphate zinc dithiocarbamate
- disulfides sulfurized olefins
- sulfurized fats and oils sulfurized esters
- (anti-rust) Rust inhibitors include, for example, fatty acids, alkenylsuccinic acid half esters, fatty acid soaps, alkylsulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, paraffin oxide, and alkylpolyoxyethylene ethers. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- Antifoaming agents include, for example, silicone oils, fluorosilicone oils, fluoroalkyl ethers, and the like. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- demulsifiers include anionic surfactants such as castor oil sulfates and petroleum sulfonates; cationic surfactants such as quaternary ammonium salts and imidazolines; polyoxyalkylene polyglycols and their dicarboxylic acids. esters; alkylene oxide adducts of alkylphenol-formaldehyde polycondensates; and the like. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- solubilizer examples include ester compounds such as fatty acid esters and aromatic-containing compounds. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- the compound (B1) contained in the molybdenum-based friction modifier (B) has excellent solubility (oil solubility) without using a dissolution aid, and is stable in low temperature storage. You can improve your character. Therefore, from the viewpoint of improving the solubility of the molybdenum-based friction modifier (B), it is preferable that the amount of the dissolution aid used is small.
- the 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 0.05 parts by mass with respect to 100 parts by mass of the molybdenum-based friction modifier (B). It should contain less than parts by weight, more preferably no solubilizing agent.
- Ashless friction modifiers include, for example, ester friction modifiers, amine friction modifiers, amide friction modifiers, and ether friction modifiers. These may be used individually by 1 type, and may be used in combination of 2 or more type.
- the lubricating oil composition of the present embodiment can sufficiently improve fuel economy performance without using an ashless friction modifier. Therefore, it is preferable that the content of the ashless friction modifier is 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, and still more preferably less than 1.0 parts by mass with respect to 100 parts by mass of the molybdenum friction modifier (B) It contains less than 0.1 parts by weight, more preferably less than 0.01 parts by weight, and even more preferably no ashless friction modifiers.
- the lubricating oil composition according to this embodiment needs to have a 100° C. kinematic viscosity of 9.3 mm 2 /s or less. If the 100° C. kinematic viscosity of the lubricating oil composition is more than 9.3 mm 2 /s, power loss due to viscous resistance of the lubricating oil composition makes it difficult to obtain the effect of improving fuel efficiency. From the viewpoint of making it easier to obtain the fuel efficiency improvement effect, the 100° C.
- kinematic viscosity 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. It is 1 mm 2 /s or less.
- the 100° C. kinematic viscosity of the lubricating oil composition is preferably 3.8 mm 2 /s or more, more preferably 4.0 mm 2 /s or more, and further It is preferably 5.0 mm 2 /s or more.
- the lubricating oil composition according to the present embodiment preferably has an HTHS viscosity (high temperature high shear viscosity) at 150° C. of 1.7 mPa ⁇ s or more from the viewpoint of oil film retention.
- the lubricating oil composition according to the present embodiment has an HTHS viscosity at 150° C. of preferably less than 2.9 mPa s, more preferably less than 2.6 mPa s, and even more preferably It is less than 2.3 mPa ⁇ s, still more preferably less than 2.0 mPa ⁇ s.
- lubricating oil composition is determined according to ASTM D4683 using a TBS high temperature viscometer (Tapered Bearing Simulator Viscometer) at a temperature of 150° C. and a shear rate of 10 6 /s. It is a value measured at
- the lubricating oil composition according to the present embodiment does not generate cloudiness or precipitation in the low-temperature storage stability test described later in the Examples.
- the lubricating oil composition according to the present embodiment preferably has a discoloration number of 1 in a copper plate corrosion test described later in Examples.
- the lubricating oil composition according to the present embodiment has a copper elution amount after an ISOT test described in the examples described later, based on the total amount of the lubricating oil composition, preferably 90 ppm by mass or less, more preferably 70 mass ppm or less, more preferably 60 mass ppm or less.
- the lubricating oil composition according to the present embodiment has a fuel efficiency improvement (FEI% vs JASO BC) with respect to JASO BC (base calibration oil) in the fuel efficiency test described in the examples described later is 1.05 or more. is preferable, and 1.10 or more is more preferable.
- FEI% vs JASO BC fuel efficiency improvement
- the method for producing the lubricating oil composition according to this embodiment is not particularly limited.
- the method for producing a lubricating oil composition according to the present embodiment has a step of mixing 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 are each independently a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a carbon
- ⁇ which is an aliphatic hydrocarbon group of numbers 13 to 22 is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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.
- the content of the benzotriazole compound (C) is adjusted to be 0.03% by mass or less based on the total amount of the lubricating oil composition. Furthermore, in the above step, the lubricating oil composition is adjusted to have a kinematic viscosity at 100° C. of 9.3 mm 2 /s or less.
- the method for mixing the above components is not particularly limited. (one or more of the above). At that time, the above-mentioned other lubricating oil additives may be blended at the same time. Further, each component may be blended after adding a diluent oil or the like to form a solution (dispersion). After blending each component, it is preferable to stir and uniformly disperse the components by a known method.
- the lubricating oil composition according to the present embodiment has excellent low-temperature storage stability, excellent copper corrosion resistance, and high fuel efficiency. Therefore, the lubricating oil composition according to the present embodiment is preferably used for internal combustion engines, more preferably for gasoline engines, and even more preferably for automobile engines. Therefore, the lubricating oil composition according to this embodiment provides the following (1) to (3).
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1), [In the general formula (b1), R 1 , R 2 , R 3 and R 4 are each independently a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a carbon A long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group of numbers 13 to 22 is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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.
- the content of the benzotriazole compound (C) is 0.03% by mass or less based on the total amount of the lubricating oil composition, A lubricating oil composition having a kinematic viscosity at 100° C. of 9.3 mm 2 /s or less.
- lubricants selected from the group consisting of viscosity index improvers, pour point depressants, metallic detergents, ashless dispersants, antioxidants, antiwear agents, and extreme pressure agents
- the content of the ashless friction modifier is less than 10 parts by mass with respect to 100 parts by mass of the molybdenum friction modifier (B), according to any one of [1] to [6] above.
- lubricating oil composition [8] The lubricating oil composition according to any one of [1] to [7] above, which is used in an internal combustion engine. [9] The lubricating oil composition according to any one of [1] to [8] above, which is used in a gasoline engine. [10] A method of using the lubricating oil composition according to any one of [1] to [8] above in an internal combustion engine.
- the molybdenum-based friction modifier (B) contains a compound (B1) represented by the following general formula (b1), [In the general formula (b1), R 1 , R 2 , R 3 and R 4 are each independently a short-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a carbon A long-chain substituent group ( ⁇ ) which is an aliphatic hydrocarbon group of numbers 13 to 22 is shown.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule 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.
- the content of the benzotriazole compound (C) is adjusted to be 0.03% by mass or less based on the total amount of the lubricating oil composition.
- the method for producing a lubricating oil composition wherein in the above step, the lubricating oil composition is adjusted to have a kinematic viscosity at 100° C. of 9.3 mm 2 /s or less.
- Examples 1 to 3 Comparative Examples 1 to 8
- the following base oils and additives were sufficiently mixed in the blending amounts (% by mass) shown in Table 1 to prepare lubricating oil compositions of Examples 1 to 3 and Comparative Examples 1 to 8, respectively. Details of the base oils and additives used in Examples 1 to 3 and Comparative Examples 1 to 8 are as follows.
- MoDTC-1 in the general formula (b1), 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 carbon atoms It is a compound whose number is 13.
- X 1 , X 2 , X 3 and X 4 are sulfur atoms.
- the molar ratio [( ⁇ )/( ⁇ )] between the short-chain substituent group ( ⁇ ) and the long-chain substituent group ( ⁇ ) in the entire molecule of MoDTC-1 is 1.0.
- ⁇ MoDTC-2 MoDTC-2 is substantially free of the short-chain substituent group ( ⁇ ) in the general formula (b1) and consists essentially of the long-chain substituent group ( ⁇ ), and the long-chain substituent group ( ⁇ ) is a compound in which the aliphatic hydrocarbon group has 13 carbon atoms.
- X 1 , X 2 , X 3 and X 4 are sulfur atoms.
- ⁇ MoDTC-3 MoDTC-3 is substantially free of the long-chain substituent group ( ⁇ ) in the general formula (b1) and consists essentially of the short-chain substituent group ( ⁇ ), and the short-chain substituent group ( ⁇ ) in which the aliphatic hydrocarbon group has 8 carbon atoms.
- X 1 , X 2 , X 3 and X 4 are sulfur atoms.
- the combination of MoDTC-1 and MoDTC-2 in Examples 1 to 3 and Comparative Example 5 corresponds to compound (B1).
- ⁇ "Metal detergent Calcium sulfonate (base number: 305 mgKOH/g) Calcium sulfonate was added so that the content of calcium atoms derived from calcium sulfonate in the lubricating oil composition was 0.16% by mass.
- ⁇ "Ashless dispersant Succinimide (nitrogen content: 1.4% by mass) Succinimide was added so that the nitrogen atom content derived from succinimide in the lubricating oil composition was 0.05% by mass.
- Test method 1 Copper plate corrosion test JIS K2513: 2000 (Petroleum products-Copper plate corrosion test method-), a copper plate corrosion test was performed, and Lubricating oils of Examples 1 to 3 and Comparative Examples 1 to 8 The composition was evaluated for copper corrosion resistance.
- Test method 2 Evaluation of copper elution after ISOT test Put copper pieces and iron pieces as catalysts in each of the test oils (lubricating oil compositions of Examples 1 to 3 and Comparative Examples 1 to 8), JIS K2514-1 ISOT test according to :2013 was conducted at a test temperature of 165.5°C for 72 hours to force aging the test oil.
- Table 1 shows the results. In the evaluation results shown in Table 1, "evaluation A” means pass, and “evaluation B” means failure.
- Table 1 shows the following. It can be seen that the lubricating oil compositions of Examples 1 to 3 are excellent in all of low-temperature storage stability, copper corrosion resistance, and fuel economy.
- Comparative Examples 2 and 7 show the following.
- a compound substantially free of the short-chain substituent group ( ⁇ ) and substantially composed of the long-chain substituent group ( ⁇ ) i.e., a molar ratio [( ⁇ )/( ⁇ )) of 0.00 A certain compound
- a molar ratio [( ⁇ )/( ⁇ )) of 0.00 A certain compound is found to be inferior in copper corrosion resistance and fuel economy (comparison Example 2).
- the lubricating oil composition containing the compound as a molybdenum-based friction modifier and further containing the benzotriazole-based compound (C) (compound (C1)) is used, the copper corrosion resistance is sufficiently high. It can be seen that there is no improvement (Comparative Example 7).
- Comparative Examples 1, 3, 4, and 6 reveal the following. Contains a compound having a molar ratio [( ⁇ )/( ⁇ )] of more than 0.50 (1.00) as a molybdenum-based friction modifier, and does not contain a benzotriazole-based compound (C) (compound (C1)) It can be seen that the lubricating oil composition is inferior in both low-temperature storage stability and copper corrosion resistance (Comparative Examples 1 and 3). Then, even in the case of a lubricating oil composition containing the compound and further containing the benzotriazole compound (C) (compound (C1)), although the copper corrosion resistance is improved and becomes good, It can be seen that the cold storage stability is poor (Comparative Examples 4 and 6).
- the compound (B1) having a molar ratio [( ⁇ )/( ⁇ )] within the range of 0.10 to 0.50 was contained as a molybdenum friction modifier.
- lubricating oil compositions containing more than 0.03% by mass of the benzotriazole compound (C) (compound (C1)) are inferior in fuel economy.
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
Description
上記一般式(1)中、R1~R4は、C11~C14イソアルキル基である。Xは、酸素及び/又は硫黄原子を表す。R1~R4は、平均して98%超のC13を含む。
低温下において、MoDTC等のモリブデン系摩擦調整剤に起因するくもりや沈殿が潤滑油組成物に発生すると、オイルフィルターの閉塞及びモリブデン系摩擦調整剤に基づく摩擦低減効果の損失に繋がる。そのため、潤滑油組成物の低温貯蔵安定性を良好なものとすることは極めて重要である。
また、潤滑油組成物には、更なる省燃費性能の改善も求められている。
なお、本明細書において、「耐銅腐食性」とは、銅系部材が腐食した場合であっても油中への銅溶出が起こり難いことを意味する。
[1] 基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を含有する潤滑油組成物であって、
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含み、
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
前記ベンゾトリアゾール系化合物(C)の含有量が、前記潤滑油組成物の全量基準で、0.03質量%以下であり、
100℃における動粘度が9.3mm2/s以下である、潤滑油組成物。
[2]
上記[1]に記載の潤滑油組成物を、内燃機関に用いる、使用方法。
[3]
基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を混合する工程を有し、
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含み、
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
前記工程において、前記ベンゾトリアゾール系化合物(C)の含有量は、前記潤滑油組成物の全量基準で、0.03質量%以下となるように調整され、
前記工程において、潤滑油組成物は、100℃における動粘度が9.3mm2/s以下となるように調整される、潤滑油組成物の製造方法。
また、本明細書に記載された数値範囲「下限値~上限値」は、特に断りのない限り、下限値以上、上限値以下であることを意味する。
また、本明細書において、実施例の数値は、上限値又は下限値として用いられ得る数値である。
本実施形態の潤滑油組成物は、基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を含有する。
本実施形態の潤滑油組成物において、前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含む。
前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。
本実施形態の潤滑油組成物において、前記ベンゾトリアゾール系化合物(C)の含有量は、前記潤滑油組成物の全量基準で、0.03質量%以下である。
そして、本実施形態の潤滑油組成物は、100℃における動粘度が9.3mm2/s以下である。
まず、一般式(b1)において、R1、R2、R3、及びR4を炭素数13のアルキル基とし、短鎖置換基群(α)を実質的に含まず、長鎖置換基群(β)のみを実質的に含む化合物を配合した潤滑油組成物について検討した。その結果、潤滑油組成物の低温貯蔵安定性は良好となる一方で、耐銅腐食性が劣ることがわかった。
そこで、当該化合物に加えて、金属不活性化剤であるベンゾトリアゾール系化合物を配合した潤滑油組成物について検討した。しかし、耐銅腐食性の十分な改善には至らなかった。
次に、一般式(b1)において、R1、R2、R3、及びR4を炭素数8のアルキル基とし、長鎖置換基群(β)を実質的に含まず、短鎖置換基群(α)のみを実質的に含む化合物を配合した潤滑油組成物について検討した。その結果、潤滑油組成物の耐銅腐食性は良好となる一方で低温貯蔵安定性が劣ることがわかった。
本発明者らは、上記検討結果を踏まえ、さらに種々検討を行った。その結果、一般式(b1)で表される化合物(B1)における短鎖置換基群(α)及び長鎖置換基群(β)のモル比と、潤滑油組成物中のベンゾトリアゾール系化合物の含有量とが、上記課題を解決する上で重要であることを見出すに至り、さらに種々検討を重ねて、本発明を完成するに至った。
なお、本実施形態にかかる潤滑油組成物において、成分(A)、成分(B)、及び成分(C)の合計含有量の上限値は、成分(A)、成分(B)、及び成分(C)以外の潤滑油用添加剤との関係で調整すればよく、通常100質量%未満、好ましくは99質量%以下、より好ましくは97質量%以下、更に好ましくは95質量%以下である。
これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは80質量%~100質量%未満、より好ましくは85質量%~99質量%以下、更に好ましくは88質量%~97質量%、より更に好ましくは88質量%~95質量%である。
本実施形態にかかる潤滑油組成物は、基油(A)を含有する。
基油(A)としては、従来、潤滑油の基油として用いられている鉱油及び合成油から選択される1種以上を、特に制限なく使用することができる。
基油(A)の100℃動粘度が2.0mm2/s以上であると、潤滑油組成物の蒸発損失を抑制しやすい。
また、基油(A)の100℃動粘度が9.0mm2/s以下であると、潤滑油組成物の粘性抵抗による動力損失を抑えやすく、燃費改善効果が得られやすい。
これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは75質量%~97質量%、より好ましくは80質量%~95質量%、更に好ましくは85質量%~93質量%である。
具体的には、例えば、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、ブテニル基、ペンテニル基、ヘキセニル基、ヘプテニル基、オクテニル基、ノネニル基、デセニル基、ウンデセニル基、ドデセニル基が挙げられる。これらは、直鎖状であってもよく、分岐鎖状であってもよい。
なお、短鎖置換基群(α)として選択し得る、脂肪族炭化水素基の炭素数は、本発明の効果をより発揮させやすくする観点から、好ましくは5~11、より好ましくは6~10、更に好ましくは7~9である。
具体的には、例えば、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基、ノナデシル基、イコシル基、ヘンイコシル基、ドコシル基、トリデセニル基、テトラデセニル基、ペンタデセニル基、ヘキサデセニル基、ヘプタデセニル基、オクタデセニル基、オレイル基、ノナデセニル基、イコセニル基、ヘンイコセニル基、ドコセニル基、が挙げられる。これらは、直鎖状であってもよく、分岐鎖状であってもよい。
なお、長鎖置換基群(β)として選択し得る、脂肪族炭化水素基の炭素数は、本発明の効果をより発揮させやすくする観点から、好ましくは13~20、より好ましくは13~16、更に好ましくは13~14である。
ここで、耐銅腐食性をより発揮させやすくする観点、省燃費性能を向上させやすくする観点から、モル比[(α)/(β)]は、好ましくは0.15以上、より好ましくは0.20以上である。また、低温貯蔵安定性をより発揮させやすくする観点から、モル比[(α)/(β)]は、好ましくは0.45以下、より好ましくは0.42以下、更に好ましくは0.40以下である。
これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは0.15~0.45、より好ましくは0.20~0.42、更に好ましくは0.20~0.40である。
したがって、化合物(B1)には、前記一般式(b1)中、R1、R2、R3、及びR4が全て短鎖置換基群(α)である分子群(B1-1)が混在していてもよく、R1、R2、R3、及びR4が全て長鎖置換基群(β)である分子群(B1-2)が混在していてもよく、R1、R2、R3、及びR4の一部が短鎖置換基群(α)であり、残部が長鎖置換基群(β)である分子群(B1-3)が混在していてもよい。
分子群(B1-3)における短鎖置換基群(α)と長鎖置換基群(β)とのモル比[(α)/(β)]は、好ましくは0.3以上、より好ましくは0.5以上、更に好ましくは0.8以上である。また、好ましくは3.0以下、より好ましくは2.0以下、更に好ましくは1.5以下である。これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは0.3~3.0、より好ましくは0.5~2.0、更に好ましくは0.8~1.5である。
化合物(B1)中の分子群(B1-3)の含有量としては、化合物(B1)の全量基準で、好ましくは10モル%以上、より好ましくは15モル%以上、更に好ましくは20モル%以上である。また、好ましくは40モル%以下、より好ましくは35モル%以下、更に好ましくは30モル%以下である。これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは10モル%~40モル%、より好ましくは15モル%~35モル%、更に好ましくは20モル%~30モル%である。
化合物(B1)中の分子群(B1-2)の含有量としては、化合物(B1)の全量基準で、好ましくは50モル%以上、より好ましくは55モル%以上、更に好ましくは60モル%以上である。また、好ましくは75モル%以下、より好ましくは70モル%以下、更に好ましくは65モル%以下である。これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは50モル%~75モル%、より好ましくは55モル%~70モル%、更に好ましくは60モル%~65モル%である。
これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは0.30質量%~1.50質量%、より好ましくは0.40質量%~1.25質量%、更に好ましくは0.50質量%~1.00質量%、より更に好ましくは0.60質量%~1.00質量%である。
これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは0.04質量%~0.18質量%、より好ましくは0.05質量%~0.15質量%、更に好ましくは0.06質量%~0.12質量%、より更に好ましくは0.07質量%~0.12質量%である。
本実施形態の潤滑油組成物は、ベンゾトリアゾール系化合物(C)を含有する。
潤滑油組成物がベンゾトリアゾール系化合物(C)を含有しない場合、潤滑油組成物が耐銅腐食性に劣るものとなる。
また、本実施形態の潤滑油組成物は、ベンゾトリアゾール系化合物(C)の含有量が、潤滑油組成物の全量基準で、0.03質量%以下であることを要する。ベンゾトリアゾール系化合物(C)の含有量が、潤滑油組成物の全量基準で、0.03質量%超である場合、潤滑油組成物の省燃費性の向上効果が発揮されなくなる。
ここで、本実施形態において、潤滑油組成物の省燃費性の向上効果をより発揮させやすくする観点から、ベンゾトリアゾール系化合物(C)の含有量は、潤滑油組成物の全量基準で、好ましくは0.02質量%以下、より好ましくは0.015質量%以下である。また、耐銅腐食性をより向上させやすくする観点から、ベンゾトリアゾール系化合物(C)の含有量は、潤滑油組成物の全量基準で、好ましくは0.003質量%以上、より好ましくは0.005質量%以上である。
これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは0.003質量%~0.02質量%、より好ましくは0.005質量%~0.015質量%である。
ここで、本実施形態において、本発明の効果をより発揮させやすくする観点から、ベンゾトリアゾール系化合物(C)は、下記一般式(c1)で表される化合物(C1)を含むことが好ましい。
本実施形態の潤滑油組成物において、前記モリブデン系摩擦調整剤(B)と前記ベンゾトリアゾール系化合物(C)との含有比率[(B)/(C)]は、本発明の効果をより発揮させやすくする観点から、質量比で、好ましくは20以上、より好ましくは30以上、更に好ましくは40以上、より更に好ましくは50以上、更になお好ましくは60以上である。また、好ましくは120以下、より好ましくは110以下、更に好ましくは100以下、より更に好ましくは90以下、更になお好ましくは80以下である。これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは20~120、より好ましくは30~110、更に好ましくは40~100、より更に好ましくは50~90、更になお好ましくは60~80である。
本実施形態の潤滑油組成物は、本発明の効果を損なわない範囲で、成分(B)及び成分(C)には該当しない、その他潤滑油用添加剤を含有していてもよい。
その他潤滑油用添加剤としては、例えば、粘度指数向上剤、流動点降下剤、金属系清浄剤、無灰系分散剤、酸化防止剤、耐摩耗剤、極圧剤、防錆剤、消泡剤、抗乳化剤、溶解助剤、及び無灰系摩擦調整剤等が挙げられ、好ましくは、粘度指数向上剤、流動点降下剤、金属系清浄剤、無灰系分散剤、酸化防止剤、耐摩耗剤、及び極圧剤等が挙げられる。
これらの各潤滑油用添加剤は、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
本実施形態の潤滑油組成物は、粘度指数向上剤を含有していてもよく、含有していなくてもよい。
粘度指数向上剤としては、例えば、非分散型ポリアルキル(メタ)アクリレート、分散型ポリアルキル(メタ)アクリレート等のPMA系;オレフィン系共重合体(例えば、エチレン-プロピレン共重合体など)、分散型オレフィン系共重合体等のOCP系;スチレン系共重合体(例えば、スチレン-ジエン共重合体、スチレン-イソプレン共重合体など)などが挙げられる。
なお、本明細書中、「(メタ)アクリレート」とは、アクリレート又はメタクリレートを意味する。
各成分の質量平均分子量(Mw)は、ゲルパーミエーションクロマトグラフィー(GPC)法で測定される標準ポリスチレン換算の値である。
また、粘度指数向上剤は、樹脂分として、例えば、前述の重合体を含むものであるが、通常はハンドリング性や前述の基油への溶解性を考慮し、重合体を含む樹脂分が鉱油等の希釈剤により希釈された溶液の状態で市販されていることが多い。
本実施形態の潤滑油組成物が粘度指数向上剤を含有する場合、粘度指数向上剤の含有量は、樹脂分換算での含有量として、潤滑油組成物の全量基準で、好ましくは0.1質量%~2.6質量%、より好ましくは0.2質量%~1.0質量%、更に好ましくは0.3質量%~0.7質量%である。
本実施形態の潤滑油組成物は、流動点降下剤を含有することが好ましい。
流動点降下剤としては、例えば、エチレン-酢酸ビニル共重合体、塩素化パラフィンとナフタレンとの縮合物、塩素化パラフィンとフェノールとの縮合物、ポリメタクリレート系(PMA系;ポリアルキル(メタ)アクリレート等)、ポリビニルアセテート、ポリブテン、ポリアルキルスチレン等が挙げられ、ポリメタクリレート系が好ましく用いられる。
これらの流動点降下剤は、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
本実施形態の潤滑油組成物が流動点降下剤を含有する場合、流動点降下剤の含有量は、樹脂分換算での含有量として、潤滑油組成物の全量基準で、好ましくは0.01質量%~0.12質量%、より好ましくは0.03質量%~0.09質量%、更に好ましくは0.05質量%~0.07質量%である。
本実施形態の潤滑油組成物は、金属系清浄剤を含有することが好ましい。潤滑油組成物が金属系清浄剤を含有することで、高温運転時のエンジン内部のデポジットの生成を抑制し、スラッジの堆積を防止してエンジン内部を清浄に保つとともに、エンジン油の劣化等に起因して生じる酸性物質を中和し、腐食摩耗を防止することができる。
なお、本明細書において、「アルカリ金属」は、ナトリウム及びカリウムを指す。
また、「アルカリ土類金属」は、マグネシウム、カルシウム、ストロンチウム、及びバリウムを指す。
金属系清浄剤に含まれる金属原子としては、高温での清浄性の向上の観点から、アルカリ土類金属が好ましく、アルカリ土類金属の中でもマグネシウム及びカルシウムが好ましく、カルシウムがより好ましい。
MEは、アルカリ土類金属であり、マグネシウム又はカルシウムが好ましい。
pは、Mの価数であり、1又は2である。Rd1は、それぞれ独立して、水素原子又は炭素数1~18の炭化水素基である。
qは、0以上の整数であり、好ましくは0~3の整数、より好ましくは1又は2である。
Rd1として選択し得る炭化水素基としては、例えば、炭素数1~18のアルキル基、炭素数1~18のアルケニル基、環形成炭素数3~18のシクロアルキル基、環形成炭素数6~18のアリール基、炭素数7~18のアルキルアリール基、炭素数7~18のアリールアルキル基等が挙げられる。
金属系清浄剤の塩基価としては、好ましくは0~600mgKOH/gである。
ここで、本実施形態において、金属系清浄剤は、中性、塩基性、過塩基性のいずれであっても良いが、潤滑油組成物の清浄性向上の観点から、塩基性又は過塩基性であることが好ましく、過塩基性であることが更に好ましい。金属系清浄剤が過塩基性である場合、塩基価は、好ましくは150mgKOH/g以上、より好ましくは200mgKOH/g以上、更に好ましくは250mgKOH/g以上である。また、好ましくは600mgKOH/g以下、より好ましくは500mgKOH/g以下、更に好ましくは450mgKOH/g以下である。これらの数値範囲の上限値及び下限値は任意に組み合わせることができる。具体的には、好ましくは150mgKOH/g~600mgKOH/g、より好ましくは200mgKOH/g~500mgKOH/g、更に好ましくは250mgKOH/g~450mgKOH/gである。
なお、本明細書において、「塩基価」とは、JIS K2501:2003の9に準拠して、電位差滴定法(塩基価・過塩素酸法)により測定した値を意味する。
また、本実施形態の潤滑油組成物が金属系清浄剤を含有する場合、金属系清浄剤の含有量は、金属系清浄剤に由来する金属原子(アルカリ金属原子、アルカリ土類金属原子)の含有量が、上記範囲を充足するように調整すればよい。金属系清浄剤の含有量は、潤滑油組成物の全量基準で、好ましくは0.5質量%~4.0質量%、より好ましくは0.7質量%~3.0質量%、更に好ましくは1.0質量%~2.0質量%である。
本実施形態の潤滑油組成物は、無灰系分散剤を含有することが好ましい。潤滑油組成物が無灰系分散剤を含有することで、比較的低温で発生するスラッジ等を油中に分散して、エンジン内部を清浄に保つことができる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
これらの中でも、エンジン内部の清浄性向上の観点から、ホウ素非含有アルケニルコハク酸イミド及びホウ素含有アルケニルコハク酸イミドから選択される1種以上のコハク酸イミド類が好ましく、ホウ素非含有アルケニルコハク酸イミド及びホウ素含有アルケニルコハク酸イミドを併用することがより好ましい。
また、本実施形態の潤滑油組成物が無灰系分散剤を含有する場合、無灰系分散剤の含有量は、無灰系分散剤に由来する窒素原子の含有量が、上記範囲を充足するように調整すればよい。無灰系分散剤の含有量は、潤滑油組成物の全量基準で、好ましくは1.0質量%~6.0質量%、より好ましくは2.0質量%~5.0質量%、更に好ましくは3.0質量%~4.0質量%である。
酸化防止剤としては、例えば、アミン系酸化防止剤、フェノール系酸化防止剤、硫黄系酸化防止剤、及びリン系酸化防止剤等が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
これらの中でも、アミン系酸化防止剤、フェノール系酸化防止剤を用いることが好ましく、アミン系酸化防止剤及びフェノール系酸化防止剤を併用することがより好ましい。
アミン系酸化防止剤としては、例えば、ジフェニルアミン、炭素数3~20のアルキル基を有するアルキル化ジフェニルアミン等のジフェニルアミン系酸化防止剤;α-ナフチルアミン、炭素数3~20のアルキル置換フェニル-α-ナフチルアミン等のナフチルアミン系酸化防止剤等が挙げられる。
フェノール系酸化防止剤としては、例えば、2,6-ジ-tert-ブチル-4-メチルフェノール、2,6-ジ-tert-ブチル-4-エチルフェノール、オクタデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート等のモノフェノール系酸化防止剤;4,4'-メチレンビス(2,6-ジ-tert-ブチルフェノール)、2,2'-メチレンビス(4-エチル-6-tert-ブチルフェノール)等のジフェノール系酸化防止剤;ヒンダードフェノール系酸化防止剤等が挙げられる。
耐摩耗剤又は極圧剤としては、例えば、ジアルキルジチオリン酸亜鉛(ZnDTP)、リン酸亜鉛、ジチオカルバミン酸亜鉛、ジスルフィド類、硫化オレフィン類、硫化油脂類、硫化エステル類、チオカーボネート類、チオカーバメート類、ポリサルファイド類等の硫黄含有化合物;亜リン酸エステル類、リン酸エステル類、ホスホン酸エステル類、及びこれらのアミン塩又は金属塩等のリン含有化合物;チオ亜リン酸エステル類、チオリン酸エステル類、チオホスホン酸エステル類、及びこれらのアミン塩又は金属塩等の硫黄及びリン含有耐摩耗剤が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
防錆剤としては、例えば、脂肪酸、アルケニルコハク酸ハーフエステル、脂肪酸セッケン、アルキルスルホン酸塩、多価アルコール脂肪酸エステル、脂肪酸アミン、酸化パラフィン、アルキルポリオキシエチレンエーテル等が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
消泡剤としては、例えば、シリコーン油、フルオロシリコーン油、フルオロアルキルエーテル等が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
抗乳化剤としては、例えば、ひまし油の硫酸エステル塩、石油スルフォン酸塩等のアニオン性界面活性剤;第四級アンモニウム塩、イミダゾリン類等のカチオン性界面活性剤;ポリオキシアルキレンポリグリコール及びそのジカルボン酸のエステル;アルキルフェノール-ホルムアルデヒド重縮合物のアルキレンオキシド付加物;等が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
溶解助剤としては、例えば、脂肪酸エステル等のエステル化合物や芳香族含有化合物が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
ここで、本実施形態の潤滑油組成物において、モリブデン系摩擦調整剤(B)に含まれる化合物(B1)は、溶解助剤を用いずとも、溶解性(油溶性)に優れ、低温貯蔵安定性を優れたものとできる。したがって、モリブデン系摩擦調整剤(B)の溶解性を向上させる観点での溶解助剤の使用量は少ないことが好ましい。
具体的には、溶解助剤の含有量は、モリブデン系摩擦調整剤(B)100質量部に対し、好ましくは5質量部未満、より好ましくは0.5質量部未満、更に好ましくは0.05質量部未満、より更に好ましくは溶解助剤を含有しないことである。
無灰系摩擦調整剤としては、例えば、エステル系摩擦調整剤、アミン系摩擦調整剤、アミド系摩擦調整剤、及びエーテル系摩擦調整剤が挙げられる。
これらは、1種を単独で用いてもよく、2種以上を組み合わせて用いてもよい。
ここで、本実施形態の潤滑油組成物は、無灰系摩擦調整剤を用いずとも、省燃費性能を十分に向上させることができる。したがって、無灰系摩擦調整剤の含有量は少ないことが好ましい。
具体的には、無灰系摩擦調整剤の含有量は、モリブデン系摩擦調整剤(B)100質量部に対し、好ましくは10質量部未満、より好ましくは1.0質量部未満、更に好ましくは0.1質量部未満、より更に好ましくは0.01質量部未満、更になお好ましくは無灰系摩擦調整剤を含有しないことである。
<100℃動粘度>
本実施形態にかかる潤滑油組成物は、100℃動粘度が、9.3mm2/s以下であることを要する。潤滑油組成物の100℃動粘度が9.3mm2/s超であると、潤滑油組成物の粘性抵抗による動力損失により、燃費改善効果が得られにくくなる。
なお、燃費改善効果をより得やすくする観点から、潤滑油組成物の100℃動粘度は、好ましくは8.2mm2/s以下、より好ましくは7.1mm2/s以下、更に好ましくは6.1mm2/s以下である。
また、潤滑油組成物の蒸発損失を抑制しやすくする観点から、潤滑油組成物の100℃動粘度は、好ましくは3.8mm2/s以上、より好ましくは4.0mm2/s以上、更に好ましくは5.0mm2/s以上である。
本実施形態にかかる潤滑油組成物は、油膜保持性の観点から、150℃におけるHTHS粘度(高温高せん断粘度)が、好ましくは1.7mPa・s以上である。また、本実施形態にかかる潤滑油組成物は、省燃費性向上の観点から、150℃におけるHTHS粘度が、好ましくは2.9mPa・s未満、より好ましくは2.6mPa・s未満、更に好ましくは2.3mPa・s未満、更により好ましくは2.0mPa・s未満である。
本明細書において、潤滑油組成物の150℃におけるHTHS粘度は、ASTM D4683に準拠し、TBS高温粘度計(Tapered Bearing Simulator Viscometer)を用いて、150℃の温度条件下、せん断速度106/sにて測定した値である。
本実施形態にかかる潤滑油組成物は、後述する実施例に記載の低温貯蔵安定性試験において、くもり及び沈殿が発生しないことが好ましい。
本実施形態にかかる潤滑油組成物は、後述する実施例に記載の銅板腐食試験おいて、変色番号が1であることが好ましい。
また、本実施形態にかかる潤滑油組成物は、後述する実施例に記載のISOT試験後の銅溶出量が、潤滑油組成物の全量基準で、好ましくは90質量ppm以下、より好ましくは70質量ppm以下、更に好ましくは60質量ppm以下である。
本実施形態にかかる潤滑油組成物は、後述する実施例に記載の省燃費性試験において、JASO BC(ベースキャリブレーションオイル)に対する燃費の向上性(FEI% vs JASO BC)が、1.05以上であることが好ましく、1.10以上であることがより好ましい。
本実施形態にかかる潤滑油組成物の製造方法は、特に制限されない。
例えば、本実施形態にかかる潤滑油組成物の製造方法は、基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を混合する工程を有する。
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含む。
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
また、前記工程において、前記ベンゾトリアゾール系化合物(C)の含有量は、前記潤滑油組成物の全量基準で、0.03質量%以下となるように調整される。
さらに、前記工程において、潤滑油組成物は、100℃における動粘度が9.3mm2/s以下となるように調整される。
本実施形態にかかる潤滑油組成物は、低温貯蔵安定性に優れるとともに、耐銅腐食性に優れ、しかも高い省燃費性能を有する。
そのため、本実施形態にかかる潤滑油組成物は、好ましくは内燃機関に用いられ、より好ましくはガソリンエンジンに用いられ、更に好ましくは自動車用エンジンに用いられる。
したがって、本実施形態にかかる潤滑油組成物は、下記(1)~(3)を提供する。
(1)本実施形態にかかる潤滑油組成物を、内燃機関に用いる、使用方法。
(2)本実施形態にかかる潤滑油組成物を、ガソリンエンジンに用いる、使用方法。
(3)本実施形態にかかる潤滑油組成物を、自動車用エンジンに用いる、使用方法。
本発明の一態様によれば、下記[1]~[11]が提供される。
[1] 基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を含有する潤滑油組成物であって、
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含み、
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
前記ベンゾトリアゾール系化合物(C)の含有量が、前記潤滑油組成物の全量基準で、0.03質量%以下であり、
100℃における動粘度が9.3mm2/s以下である、潤滑油組成物。
[2] 前記ベンゾトリアゾール系化合物(C)は、下記一般式(c1)で表される化合物(C1)を含む、上記[1]に記載の潤滑油組成物。
[前記一般式(c1)中、Rc1は、炭素数1~4のアルキル基である。pは0~4の整数である。Rc1が複数存在する場合、複数のRc1は、互いに同一であってもよく、異なっていてもよい。Rc2は、メチレン基又はエチレン基である。Rc3及びRc4は、各々独立に、水素原子又は炭素数1~18のアルキル基である。]
[3] 前記モリブデン系摩擦調整剤(B)の含有量が、前記潤滑油組成物の全量基準で、0.30質量%~1.50質量%である、上記[1]又は[2]に記載の潤滑油組成物。
[4] 前記モリブデン系摩擦調整剤(B)と前記ベンゾトリアゾール系化合物(C)との含有比率[(B)/(C)]が、質量比で、20~120である、上記[1]~[3]のいずれかに記載の潤滑油組成物。
[5] さらに、粘度指数向上剤、流動点降下剤、金属系清浄剤、無灰系分散剤、酸化防止剤、耐摩耗剤、及び極圧剤からなる群から選択される1種以上の潤滑油用添加剤を含有する、上記[1]~[4]のいずれかに記載の潤滑油組成物。
[6] 溶解助剤の含有量が、前記モリブデン系摩擦調整剤(B)100質量部に対し、5質量部未満である、上記[1]~[5]のいずれかに記載の潤滑油組成物。
[7] 無灰系摩擦調整剤の含有量が、前記モリブデン系摩擦調整剤(B)100質量部に対し、10質量部未満である、上記[1]~[6]のいずれかに記載の潤滑油組成物。
[8] 内燃機関に用いられる、上記[1]~[7]のいずれかに記載の潤滑油組成物。
[9] ガソリンエンジンに用いられる、上記[1]~[8]のいずれかに記載の潤滑油組成物。
[10]
上記[1]~[8]のいずれかに記載の潤滑油組成物を、内燃機関に用いる、使用方法。
[11]
基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を混合する工程を有し、
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含み、
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
前記工程において、前記ベンゾトリアゾール系化合物(C)の含有量は、前記潤滑油組成物の全量基準で、0.03質量%以下となるように調整され、
前記工程において、潤滑油組成物は、100℃における動粘度が9.3mm2/s以下となるように調整される、潤滑油組成物の製造方法。
各実施例及び各比較例で用いた各原料並びに各実施例及び各比較例の潤滑油組成物の各性状の測定は、以下に示す要領に従って行ったものである。
基油及び潤滑油組成物の40℃動粘度、100℃動粘度、及び粘度指数は、JIS K2283:2000に準拠して測定又は算出した。
(2)150℃におけるHTHS粘度
潤滑油組成物の150℃におけるHTHS粘度は、ASTM D4683に準拠し、TBS高温粘度計(Tapered Bearing Simulator Viscometer)を用いて、150℃の温度条件下、せん断速度106/sにて測定した。
(3)モリブデン原子含有量
潤滑油組成物のモリブデン量は、JPI-5S-38-92に準拠して測定した。
(4)窒素原子含有量
潤滑油組成物の窒素量は、JIS K2609:1998に準拠して測定した。
(5)質量平均分子量(Mw)
粘度指数向上剤及び流動点降下剤の質量平均分子量(Mw)は、ゲル浸透クロマトグラフ装置(アジレント社製、「1260型HPLC」)を用いて、下記の条件下で測定し、標準ポリスチレン換算にて測定した値を用いた。
(測定条件)
・カラム:「Shodex LF404」を2本、順次連結したもの。
・カラム温度:35℃
・展開溶媒:クロロホルム
・流速:0.3mL/min
以下に示す基油及び添加剤を、表1に示す配合量(質量%)で十分に混合し、実施例1~3及び比較例1~8の潤滑油組成物をそれぞれ調製した。
実施例1~3、比較例1~8で用いた基油及び添加剤の詳細は、以下に示すとおりである。
・「100N鉱油」
100℃動粘度:4.3mm2/s、粘度指数:123、API分類:グループIII
・「MoDTC-1」
MoDTC-1は、一般式(b1)中、短鎖置換基群(α)の脂肪族炭化水素基の炭素数が8であり、長鎖置換基群(β)の脂肪族炭化水素基の炭素数が13である化合物である。一般式(b1)中、X1、X2、X3、及びX4は、硫黄原子である。MoDTC-1の全分子中における短鎖置換基群(α)と長鎖置換基群(β)とのモル比[(α)/(β)]は、1.0である。
・「MoDTC-2」
MoDTC-2は、一般式(b1)中、短鎖置換基群(α)が実質的に存在せず、実質的には長鎖置換基群(β)からなり、当該長鎖置換基群(β)の脂肪族炭化水素基の炭素数が13である化合物である。一般式(b1)中、X1、X2、X3、及びX4は、硫黄原子である。
・「MoDTC-3」
MoDTC-3は、一般式(b1)中、長鎖置換基群(β)が実質的に存在せず、実質的に短鎖置換基群(α)からなり、当該短鎖置換基群(α)の脂肪族炭化水素基の炭素数が8である化合物である。一般式(b1)中、X1、X2、X3、及びX4は、硫黄原子である。
本実施例では、実施例1~3及び比較例5における、MoDTC-1とMoDTC-2との組み合わせが、化合物(B1)に該当する。
・「1-[N,N-ビス(2-エチルヘキシル)アミノメチル]-4-メチル-1H-ベンゾトリアゾール」
下記構造式で表される化合物である。
1-[N,N-ビス(2-エチルヘキシル)アミノメチル]-4-メチル-1H-ベンゾトリアゾールは、一般式(c1)中、Rc1が、メチル基であり、pが1であり、Rc2が、メチレン基であり、Rc3及びRc4が、2-エチルヘキシル基である化合物であり、化合物(C1)に該当する。
・「粘度指数向上剤」
ポリメタクリレート(PMA)(質量平均分子量(Mw):310,000、樹脂分:22.7質量%)
ポリメタクリレート(PMA)は、実施例1並びに比較例1及び2にのみ添加した。添加量は、潤滑油組成物の全量基準で、1.5質量%(樹脂分:0.34質量%、希釈油:1.16質量%)とした。
・「流動点降下剤」
ポリメタクリレート(PMA)(質量平均分子量(Mw):62,000、樹脂分:55.0質量%)
添加量は、潤滑油組成物の全量基準で、0.1質量%(樹脂分:0.06質量%、希釈油:0.04質量%)とした。
カルシウムスルフォネート(塩基価:305mgKOH/g)
カルシウムスルフォネートは、潤滑油組成物中のカルシウムスルフォネート由来のカルシウム原子含有量が、0.16質量%となるように添加した。
・「無灰系分散剤」
コハク酸イミド(窒素含有量:1.4質量%)
コハク酸イミドは、潤滑油組成物中のコハク酸イミド由来の窒素原子含有量が0.05質量%となるように添加した。
アミン系酸化防止剤、フェノール系酸化防止剤、ジアルキルジチオリン酸亜鉛(ZnDTP)
以下に説明する試験を実施し、低温貯蔵安定性、耐銅腐食性、及び省燃費性について評価を行った。
(1)試験方法
100mL容のガラス瓶に実施例1~3及び比較例1~8の潤滑油組成物を100mL入れて、-5℃で2週間静置した際のくもりの発生の有無と、沈殿の発生の有無を判定した。
くもりの発生の有無は、可視光吸光度における透過率40%以下(JIS K0115:2004の吸光光度分析通則に準拠し、測定波長は500~550nmである。)となれば、くもり発生有りと判定した。
沈殿の発生の有無は、目視で判定した。
(2)評価基準
くもりも沈殿も発生しなかった潤滑油組成物を合格とした。くもり及び沈殿の少なくともいずれか一方が発生した潤滑油組成物は不合格とした。
(1)試験方法1:銅板腐食試験
JIS K2513:2000(石油製品-銅板腐食試験法-)に準拠して、銅板腐食試験を実施し、実施例1~3及び比較例1~8の潤滑油組成物の耐銅腐食性を評価した。
(2)試験方法2:ISOT試験後の銅溶出評価
試験油(実施例1~3及び比較例1~8の潤滑油組成物)のそれぞれに触媒として銅片と鉄片を入れ、JIS K2514-1:2013に準拠するISOT試験を、試験温度は165.5℃で72時間実施して、試験油を強制劣化させた。そして、強制劣化させた試験油の銅濃度を、JPI-5S-44-11に準拠して測定し、これをISOT試験後の銅溶出量とした。
(3)評価基準
変色番号が「1」であり、かつISOT試験後の銅溶出量が90質量ppm以下である潤滑油組成物を合格とした。
(1)試験方法
JASO M366:2019「自動車用ガソリン機関潤滑油-ファイアリング燃費試験方法」に準拠して、実施例1~3及び比較例1~7の潤滑油組成物を対象にして試験を行い、JASO BC(ベースキャリブレーションオイル、粘度グレード:0W20)に対する燃費の向上性(FEI% vs JASO BC)を測定した。
(2)評価基準
「FEI% vs JASO BC」が1.05以上である潤滑油組成物を合格とした。
なお、表1に示す評価結果における「評価A」は合格であることを意味し、「評価B」は不合格であることを意味する。
実施例1~3の潤滑油組成物は、低温貯蔵安定性、耐銅腐食性、及び省燃費性のいずれも優れていることがわかる。
短鎖置換基群(α)を実質的に含まず、実質的に長鎖置換基群(β)から構成される化合物(すなわち、モル比[(α)/(β)]が0.00である化合物)をモリブデン系摩擦調整剤として含有し、ベンゾトリアゾール系化合物(C)(化合物(C1))を含有しない潤滑油組成物は、耐銅腐食性及び省燃費性に劣ることがわかる(比較例2)。そして、当該化合物をモリブデン系摩擦調整剤として含有し、さらにベンゾトリアゾール系化合物(C)(化合物(C1))を含有する潤滑油組成物とした場合であっても、耐銅腐食性は十分に改善されないことがわかる(比較例7)。
モル比[(α)/(β)]が0.50超(1.00)である化合物をモリブデン系摩擦調整剤として含有し、ベンゾトリアゾール系化合物(C)(化合物(C1))を含有しない潤滑油組成物は、低温貯蔵安定性及び耐銅腐食性のいずれも劣ることがわかる(比較例1及び3)。そして、当該化合物を含有し、さらにベンゾトリアゾール系化合物(C)(化合物(C1))を含有する潤滑油組成物とした場合であっても、耐銅腐食性は改善されて良好になるものの、低温貯蔵安定性は劣ることがわかる(比較例4及び6)。
Claims (11)
- 基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を含有する潤滑油組成物であって、
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含み、
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
前記ベンゾトリアゾール系化合物(C)の含有量が、前記潤滑油組成物の全量基準で、0.03質量%以下であり、
100℃における動粘度が9.3mm2/s以下である、潤滑油組成物。 - 前記モリブデン系摩擦調整剤(B)の含有量が、前記潤滑油組成物の全量基準で、0.30質量%~1.50質量%である、請求項1又は2に記載の潤滑油組成物。
- 前記モリブデン系摩擦調整剤(B)と前記ベンゾトリアゾール系化合物(C)との含有比率[(B)/(C)]が、質量比で、20~120である、請求項1~3のいずれか1項に記載の潤滑油組成物。
- さらに、粘度指数向上剤、流動点降下剤、金属系清浄剤、無灰系分散剤、酸化防止剤、耐摩耗剤、及び極圧剤からなる群から選択される1種以上の潤滑油用添加剤を含有する、請求項1~4のいずれか1項に記載の潤滑油組成物。
- 溶解助剤の含有量が、前記モリブデン系摩擦調整剤(B)100質量部に対し、5質量部未満である、請求項1~5のいずれか1項に記載の潤滑油組成物。
- 無灰系摩擦調整剤の含有量が、前記モリブデン系摩擦調整剤(B)100質量部に対し、10質量部未満である、請求項1~6のいずれか1項に記載の潤滑油組成物。
- 内燃機関に用いられる、請求項1~7のいずれか1項に記載の潤滑油組成物。
- ガソリンエンジンに用いられる、請求項1~8のいずれか1項に記載の潤滑油組成物。
- 請求項1~7のいずれか1項に記載の潤滑油組成物を、内燃機関に用いる、使用方法。
- 基油(A)、モリブデン系摩擦調整剤(B)、及びベンゾトリアゾール系化合物(C)を混合する工程を有し、
前記モリブデン系摩擦調整剤(B)は、下記一般式(b1)で表される化合物(B1)を含み、
[前記一般式(b1)中、R1、R2、R3、及びR4は、各々独立に、炭素数4~12の脂肪族炭化水素基である短鎖置換基群(α)又は炭素数13~22の脂肪族炭化水素基である長鎖置換基群(β)を示す。但し、前記化合物(B1)の全分子中における前記短鎖置換基群(α)と前記長鎖置換基群(β)とのモル比[(α)/(β)]は、0.10~0.50である。また、前記一般式(b1)中、X1、X2、X3、及びX4は、各々独立に、酸素原子又は硫黄原子を示す。]
前記工程において、前記ベンゾトリアゾール系化合物(C)の含有量は、前記潤滑油組成物の全量基準で、0.03質量%以下となるように調整され、
前記工程において、潤滑油組成物は、100℃における動粘度が9.3mm2/s以下となるように調整される、潤滑油組成物の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280021587.7A CN116997640A (zh) | 2021-03-17 | 2022-02-24 | 润滑油组合物 |
EP22771032.4A EP4310165A1 (en) | 2021-03-17 | 2022-02-24 | Lubricant composition |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021043791A JP7104200B1 (ja) | 2021-03-17 | 2021-03-17 | 潤滑油組成物 |
JP2021-043791 | 2021-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022196274A1 true WO2022196274A1 (ja) | 2022-09-22 |
Family
ID=82482482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/007511 WO2022196274A1 (ja) | 2021-03-17 | 2022-02-24 | 潤滑油組成物 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4310165A1 (ja) |
JP (1) | JP7104200B1 (ja) |
CN (1) | CN116997640A (ja) |
WO (1) | WO2022196274A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008106199A (ja) * | 2006-10-27 | 2008-05-08 | Idemitsu Kosan Co Ltd | 潤滑油組成物 |
JP2011195774A (ja) * | 2010-03-23 | 2011-10-06 | Adeka Corp | 内燃機関用潤滑油組成物 |
JP2014514407A (ja) * | 2011-04-15 | 2014-06-19 | ヴァンダービルト ケミカルズ、エルエルシー | ジアルキルジチオカルバミン酸モリブデン組成物、およびこれらを含有する潤滑組成物 |
WO2018139403A1 (ja) * | 2017-01-24 | 2018-08-02 | 株式会社Adeka | エンジン油組成物 |
JP2021031577A (ja) * | 2019-08-23 | 2021-03-01 | 株式会社Adeka | 潤滑油組成物 |
-
2021
- 2021-03-17 JP JP2021043791A patent/JP7104200B1/ja active Active
-
2022
- 2022-02-24 EP EP22771032.4A patent/EP4310165A1/en active Pending
- 2022-02-24 CN CN202280021587.7A patent/CN116997640A/zh active Pending
- 2022-02-24 WO PCT/JP2022/007511 patent/WO2022196274A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008106199A (ja) * | 2006-10-27 | 2008-05-08 | Idemitsu Kosan Co Ltd | 潤滑油組成物 |
JP2011195774A (ja) * | 2010-03-23 | 2011-10-06 | Adeka Corp | 内燃機関用潤滑油組成物 |
JP2014514407A (ja) * | 2011-04-15 | 2014-06-19 | ヴァンダービルト ケミカルズ、エルエルシー | ジアルキルジチオカルバミン酸モリブデン組成物、およびこれらを含有する潤滑組成物 |
WO2018139403A1 (ja) * | 2017-01-24 | 2018-08-02 | 株式会社Adeka | エンジン油組成物 |
JP2021031577A (ja) * | 2019-08-23 | 2021-03-01 | 株式会社Adeka | 潤滑油組成物 |
Also Published As
Publication number | Publication date |
---|---|
JP2022143333A (ja) | 2022-10-03 |
EP4310165A1 (en) | 2024-01-24 |
CN116997640A (zh) | 2023-11-03 |
JP7104200B1 (ja) | 2022-07-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5203590B2 (ja) | 潤滑油組成物 | |
US11034908B2 (en) | Lubricant composition | |
KR102596093B1 (ko) | 내연 기관용 윤활유 조성물 | |
KR20170129686A (ko) | 가솔린 엔진용 윤활유 조성물 및 그의 제조 방법 | |
WO2015152226A1 (ja) | 内燃機関用潤滑油組成物 | |
KR20170134970A (ko) | 가솔린 엔진용 윤활유 조성물 및 그의 제조 방법 | |
JP7444782B2 (ja) | 潤滑油組成物及びその製造方法 | |
JP2016190918A (ja) | 潤滑油組成物 | |
JP7457695B2 (ja) | 潤滑油組成物 | |
JP2018168344A (ja) | 内燃機関用潤滑油組成物 | |
WO2022196274A1 (ja) | 潤滑油組成物 | |
JP7113162B1 (ja) | 潤滑油組成物 | |
US20240158716A1 (en) | Lubricant composition | |
JP2020164620A (ja) | 潤滑油組成物 | |
JP7164764B1 (ja) | 潤滑油組成物 | |
JP7304229B2 (ja) | 潤滑油組成物 | |
JP2019147864A (ja) | 潤滑油組成物 | |
JP2004143273A (ja) | エンジン油組成物 | |
RU2802289C2 (ru) | Смазочные композиции | |
WO2022209942A1 (ja) | 潤滑油組成物 | |
WO2023234295A1 (ja) | 潤滑油組成物 | |
JP2008231203A (ja) | 内燃機関用潤滑油組成物 | |
WO2023182073A1 (ja) | 潤滑油組成物 | |
KR20230011331A (ko) | 콤(comb) 폴리메타크릴레이트와 에틸렌계 올레핀 공중합체 점도 조절제를 포함하는 윤활유 조성물 | |
WO2021200799A1 (ja) | 潤滑油組成物 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22771032 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18548365 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280021587.7 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022771032 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022771032 Country of ref document: EP Effective date: 20231017 |