US20240110121A1 - Lubricant composition - Google Patents
Lubricant composition Download PDFInfo
- Publication number
- US20240110121A1 US20240110121A1 US18/263,924 US202218263924A US2024110121A1 US 20240110121 A1 US20240110121 A1 US 20240110121A1 US 202218263924 A US202218263924 A US 202218263924A US 2024110121 A1 US2024110121 A1 US 2024110121A1
- Authority
- US
- United States
- Prior art keywords
- mass
- lubricating oil
- group
- oil composition
- boron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 170
- 239000000314 lubricant Substances 0.000 title 1
- 239000010687 lubricating oil Substances 0.000 claims abstract description 165
- 239000002270 dispersing agent Substances 0.000 claims abstract description 76
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 72
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 239000002184 metal Substances 0.000 claims abstract description 68
- 239000003599 detergent Substances 0.000 claims abstract description 66
- KZNICNPSHKQLFF-UHFFFAOYSA-N dihydromaleimide Natural products O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000003607 modifier Substances 0.000 claims abstract description 58
- 239000011733 molybdenum Substances 0.000 claims abstract description 53
- 239000002199 base oil Substances 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 15
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 claims abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 claims description 42
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 41
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 40
- 229910052757 nitrogen Inorganic materials 0.000 claims description 40
- 239000011777 magnesium Substances 0.000 claims description 28
- 229910052791 calcium Inorganic materials 0.000 claims description 26
- 239000011575 calcium Substances 0.000 claims description 26
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 18
- 229910052796 boron Inorganic materials 0.000 claims description 18
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 18
- 125000004429 atom Chemical group 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- -1 succinimide compound Chemical class 0.000 abstract description 87
- 230000001603 reducing effect Effects 0.000 abstract description 32
- 230000000694 effects Effects 0.000 abstract description 22
- 229960002317 succinimide Drugs 0.000 abstract description 9
- 125000004432 carbon atom Chemical group C* 0.000 description 48
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 34
- 150000001875 compounds Chemical class 0.000 description 22
- 125000000217 alkyl group Chemical group 0.000 description 20
- 239000003921 oil Substances 0.000 description 20
- 125000001931 aliphatic group Chemical group 0.000 description 15
- 125000003342 alkenyl group Chemical group 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 239000002585 base Substances 0.000 description 13
- 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 13
- 229910052698 phosphorus Inorganic materials 0.000 description 13
- 239000003963 antioxidant agent Substances 0.000 description 12
- 125000001424 substituent group Chemical group 0.000 description 12
- 239000000446 fuel Substances 0.000 description 11
- 150000001412 amines Chemical class 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 10
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 10
- 238000011156 evaluation Methods 0.000 description 10
- 239000002480 mineral oil Substances 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 10
- 229920000193 polymethacrylate Polymers 0.000 description 10
- 125000002947 alkylene group Chemical group 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 9
- 235000014113 dietary fatty acids Nutrition 0.000 description 9
- 150000002148 esters Chemical class 0.000 description 9
- 239000000194 fatty acid Substances 0.000 description 9
- 229930195729 fatty acid Natural products 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- 230000003078 antioxidant effect Effects 0.000 description 7
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 7
- 230000000994 depressogenic effect Effects 0.000 description 6
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 6
- 235000010446 mineral oil Nutrition 0.000 description 6
- 125000004437 phosphorous atom Chemical group 0.000 description 6
- 229920000768 polyamine Polymers 0.000 description 6
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 150000001342 alkaline earth metals Chemical class 0.000 description 5
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 5
- 230000001747 exhibiting effect Effects 0.000 description 5
- 150000004665 fatty acids Chemical class 0.000 description 5
- 150000002430 hydrocarbons Chemical group 0.000 description 5
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 125000004434 sulfur atom Chemical group 0.000 description 5
- 239000004711 α-olefin Substances 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 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 4
- 238000007865 diluting Methods 0.000 description 4
- 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 4
- 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 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 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 4
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 4
- 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 4
- 125000004430 oxygen atom Chemical group O* 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 4
- JDVPQXZIJDEHAN-UHFFFAOYSA-N succinamic acid Chemical compound NC(=O)CCC(O)=O JDVPQXZIJDEHAN-UHFFFAOYSA-N 0.000 description 4
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- BITAPBDLHJQAID-KTKRTIGZSA-N 2-[2-hydroxyethyl-[(z)-octadec-9-enyl]amino]ethanol Chemical compound CCCCCCCC\C=C/CCCCCCCCN(CCO)CCO BITAPBDLHJQAID-KTKRTIGZSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 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 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 125000002877 alkyl aryl group Chemical group 0.000 description 3
- 125000003710 aryl alkyl group Chemical group 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 3
- 125000000753 cycloalkyl group Chemical group 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 3
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 150000003949 imides Chemical group 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000003446 ligand Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 description 3
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 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 3
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 3
- 229920001083 polybutene Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 3
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 2
- 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
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-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
- 239000004793 Polystyrene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- XYRMLECORMNZEY-UHFFFAOYSA-B [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S Chemical compound [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S XYRMLECORMNZEY-UHFFFAOYSA-B 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 150000001350 alkyl halides Chemical class 0.000 description 2
- IMUDHTPIFIBORV-UHFFFAOYSA-N aminoethylpiperazine Chemical compound NCCN1CCNCC1 IMUDHTPIFIBORV-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 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 2
- VHRGRCVQAFMJIZ-UHFFFAOYSA-N cadaverine Chemical compound NCCCCCN VHRGRCVQAFMJIZ-UHFFFAOYSA-N 0.000 description 2
- AVVIDTZRJBSXML-UHFFFAOYSA-L calcium;2-carboxyphenolate;dihydrate Chemical compound O.O.[Ca+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O AVVIDTZRJBSXML-UHFFFAOYSA-L 0.000 description 2
- 238000004517 catalytic hydrocracking Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000003493 decenyl group Chemical group [H]C([*])=C([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 125000000755 henicosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000006038 hexenyl group Chemical group 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
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- 238000010008 shearing Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 150000008054 sulfonate salts Chemical class 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 150000003558 thiocarbamic acid derivatives Chemical class 0.000 description 1
- 150000003580 thiophosphoric acid esters Chemical class 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000002469 tricosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
- C10M133/56—Amides; Imides
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
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- 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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/04—Metals; Alloys
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- 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
- C10M139/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00
- C10M139/06—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00 having a metal-to-carbon bond
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M149/00—Lubricating compositions characterised by the additive being a macromolecular compound containing nitrogen
- C10M149/12—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M149/14—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds a condensation reaction being involved
- C10M149/18—Polyamides
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
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- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
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- 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
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/086—Imides
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- 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
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- 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
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- 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
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- 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
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- 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
- C10N2010/04—Groups 2 or 12
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- 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
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/04—Molecular weight; Molecular weight distribution
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- 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
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- 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
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- 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
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- 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
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
- C10N2030/42—Phosphor free or low phosphor content compositions
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
- C10N2030/45—Ash-less or low ash content
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- 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
- C10N2030/52—Base number [TBN]
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- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
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- C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
- C10N2060/14—Chemical after-treatment of the constituents of the lubricating composition by boron or a compound containing boron
Definitions
- the present invention relates to a lubricating oil composition.
- the lubricating oil composition is required not only to have a reduced friction coefficient but also to maintain high-temperature detergency and dispersibility over a long period of time, and therefore, a detergent and a dispersant are also used in the lubricating oil composition.
- the dispersant for example, it is known to use a succinimide compound (see, for example, PTL 1).
- the succinimide compound contained as a dispersant in the lubricating oil composition inhibits the friction-reducing action of the molybdenum-based friction modifier, and the molybdenum-based friction modifier may not exhibit an effect of reducing a friction coefficient.
- the present invention has been made in view of the above problem, and an object of the present invention is to provide a lubricating oil composition which has an excellent effect of reducing a friction coefficient while containing a molybdenum-based friction modifier and a succinimide compound.
- the present inventors have made intensive studies and found that the above problem can be solved by a specific lubricating oil composition, and have thus completed the present invention.
- the present invention provides the following [1].
- a lubricating oil composition which has an excellent effect of reducing a friction coefficient while containing a molybdenum-based friction modifier and a succinimide compound.
- a lower limit value and an upper limit value described in a stepwise manner in a preferred numerical range can be independently combined.
- a range obtained by combining the lower limit value and the upper limit value, which are independently selected, such as “10 or more and 70 or less”, “30 or more and 70 or less”, or “40 or more and 80 or less” may be selected as a preferred range.
- (meth)acrylate is used as a term indicating both “acrylate” and “methacrylate”, and the same applies to other similar terms and similar notations.
- kinematic viscosity at 40° C.” is also referred to as a “40° C. kinematic viscosity”.
- a “kinematic viscosity at 100° C.” is also referred to as a “100° C. kinematic viscosity”.
- a lubricating oil composition according to the present embodiment contains a base oil (A), a molybdenum-based friction modifier (B), a metal-based detergent (C), and a dispersant (D), in which the dispersant (D) contains a non-boron-modified polyisobutenyl succinic bisimide (D1), in an IR spectrum of the non-boron-modified polyisobutenyl succinic bisimide (D1) as determined by an FT-IR method, a ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of a peak intensity Abs (1705 cm ⁇ 1 ) at 1705 cm ⁇ 1 to a peak intensity Abs (1390 cm ⁇ 1 ) at 1390 cm ⁇ 1 is 7.5 or less, a content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is 50 mass % or more based on a total amount (100 mass %) of the dis
- the present inventors have made intensive studies to solve the above problem. As a result, it has been found that when the dispersant (D) in the lubricating oil composition contains the non-boron-modified polyisobutenyl succinic bisimide (D1) and the specific peak intensity in the IR spectrum of the non-boron-modified polyisobutenyl succinic bisimide (D1) as determined by the FT-IR method satisfies a specific condition, the dispersant (D) is less likely to inhibit a friction-reducing action of the molybdenum-based friction modifier, and a lubricating oil composition in which the molybdenum-based friction modifier exhibits an effect of reducing a friction coefficient can be obtained.
- infrared absorption at 1705 cm ⁇ 1 is caused by a C ⁇ O stretching vibration of a carbonyl group in an imide skeleton contained in the non-boron-modified polyisobutenyl succinic bisimide.
- the peak intensity Abs (1705 cm ⁇ 1 ) at 1705 cm ⁇ 1 is proportional to an amount of the carbonyl group in the imide skeleton.
- infrared absorption at 1390 cm ⁇ 1 is caused by a bending vibration of a methyl group CH 3 at a terminal of a polyisobutenyl chain contained in the non-boron-modified polyisobutenyl succinic bisimide.
- the peak intensity Abs (1390 cm ⁇ 1 ) at 1390 cm ⁇ 1 is proportional to an amount of the methyl group CH 3 at the terminal of the polyisobutenyl chain.
- the ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of these peak intensities means a relative ratio of the imide skeleton containing a carbonyl group and being a polar moiety to the polyisobutenyl chain containing a methyl group and being a nonpolar moiety in the non-boron-modified polyisobutenyl succinic bisimide.
- non-boron-modified polyisobutenyl succinic bisimide (D1) having a ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of 7.5 or less, a ratio of the polar moiety to the nonpolar moiety in the compound is relatively small as compared with the compound having the ratio more than 7.5. Therefore, the present inventors have found that, in the lubricating oil composition containing the base oil (A) as a nonpolar solvent and the polar molybdenum-based friction modifier (B), the non-boron-modified polyisobutenyl succinic bisimide (D1) is less likely to inhibit the friction-reducing action of the molybdenum-based friction modifier (B).
- the present inventors have found that even when the dispersant (D) contains the non-boron-modified polyisobutenyl succinic bisimide (D1) having a ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of 7.5 or less, a sufficient friction-reducing effect cannot be obtained when the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is less than 50 mass % based on the total amount (100 mass %) of the dispersant (D) (see Comparative Example 1 described later).
- the present inventors have found that the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is required to be 50 mass % or more based on the total amount (100 mass %) of the dispersant (D) in order to obtain a sufficient friction-reducing effect.
- the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is defined based on the total amount (100 mass %) of the dispersant (D), not based on the total amount (100 mass %) of the lubricating oil composition.
- the base oil (A), the molybdenum-based friction modifier (B), the metal-based detergent (C), and the dispersant (D) are also referred to as a component (A), a component (B), a component (C), and a component (D), respectively.
- non-boron-modified polyisobutenyl succinic bisimide (D1), a non-boron-modified succinimide (D2) other than the non-boron-modified polyisobutenyl succinic bisimide (D1), and a boron-modified succinimide (D3) are also referred to as a component (D1), a component (D2), and a component (D3), respectively.
- a total content of the component (A), the component (B), the component (C), and the component (D) is preferably 70 mass % or more, more preferably 75 mass % or more, and even more preferably 80 mass % or more.
- an upper limit value of the total content of the component (A), the component (B), the component (C), and the component (D) may be 100 mass %.
- the upper limit value of the total content of the component (A), the component (B), the component (C), and the component (D) may be regulated in relation to the other components, and is preferably 95 mass % or less, more preferably 90 mass % or less, and even more preferably 85 mass % or less.
- the lubricating oil composition according to the present embodiment contains the base oil (A).
- the base oil (A) one or more selected from a mineral oil and a synthetic oil used in related art as a base oil for a lubricating oil can be used without particular limitation.
- mineral oil examples include: atmospheric residues obtained by subjecting a crude oil, such as a paraffin base crude oil, an intermediate base crude oil, a naphthenic base crude oil to atmospheric distillation; distillates obtained by subjecting the atmospheric residue to distillation under a reduced pressure; and mineral oils obtained by subjecting the distillate to one or more refinement treatments, such as solvent deasphalting, solvent extraction, hydro-finishing, hydro-cracking, advanced hydro-cracking, solvent dewaxing, catalytic dewaxing, and hydroisomerized dewaxing.
- a crude oil such as a paraffin base crude oil, an intermediate base crude oil, a naphthenic base crude oil to atmospheric distillation
- distillates obtained by subjecting the atmospheric residue to distillation under a reduced pressure
- mineral oils obtained by subjecting the distillate to one or more refinement treatments such as solvent deasphalting, solvent extraction, hydro-finishing, hydro-cracking, advanced hydro-cracking, solvent dewaxing, catalytic dewaxing
- the synthetic oil examples include: a poly- ⁇ -olefin, such as an ⁇ -olefin homopolymer or an ⁇ -olefin copolymer (for example, a copolymer of an ⁇ -olefin having 8 to 14 carbon atoms, such as an ethylene- ⁇ -olefin copolymer); an isoparaffin; various esters, such as a polyol ester and a dibasic acid ester; various ethers, such as a polyphenyl ether; a polyalkylene glycol; an alkylbenzene; an alkylnaphthalene; and a gas-to-liquids (GTL) base oil obtained by isomerizing a wax (GTL wax) produced from a natural gas by a Fischer-Tropsch method or the like.
- a poly- ⁇ -olefin such as an ⁇ -olefin homopolymer or an ⁇ -olefin copolymer (for example, a
- the base oil used in the present embodiment is preferably a base oil classified into Group II or Group III of the base stock categories of the API (American Petroleum Institute), and more preferably a base oil classified into Group III.
- one selected from mineral oils may be used alone, or two or more selected from mineral oils may be used in combination.
- one selected from synthetic oils may be used alone, or two or more selected from synthetic oils may be used in combination.
- one or more mineral oils and one or more synthetic oils may be used in combination.
- Upper limit values of a kinematic viscosity and a viscosity index of the base oil (A) are preferably in the following ranges from the viewpoint of improving fuel consumption reducing properties, and lower limit values thereof are preferably in the following ranges from the viewpoint of reducing a loss of the lubricating oil composition due to evaporation and ensuring oil film retention.
- a kinematic viscosity at 40° C. of the base oil (A) is preferably 2.0 mm 2 /s to 100.0 mm 2 /s, more preferably 2.0 mm 2 /s to 80.0 mm 2 /s, even more preferably 2.0 mm 2 /s to 60.0 mm 2 /s, still more preferably 2.0 mm 2 /s to 40.0 mm 2 /s, and even still more preferably 5.0 mm 2 /s to 25.0 mm 2 /s.
- a kinematic viscosity at 100° C. of the base oil (A) is preferably 2.0 mm 2 /s to 20.0 mm 2 /s, more preferably 2.0 mm 2 /s to 10.0 mm 2 /s, even more preferably 2.0 mm 2 /s to 8.0 mm 2 /s, and still more preferably 2.0 mm 2 /s to 5.0 mm 2 /s.
- a viscosity index of the base oil (A) is preferably 80 or more, more preferably 90 or more, even more preferably 100 or more, still more preferably 105 or more, and even still more preferably 120 or more.
- the kinematic viscosity at 40° C., the kinematic viscosity at 100° C., and the viscosity index can be measured or calculated in accordance with JIS K 2283:2000.
- the kinematic viscosity and the viscosity index of the mixed base oil are preferably within the above ranges.
- a content of the base oil (A) is not particularly limited, and is preferably 60 mass % to 99 mass %, more preferably 70 mass % to 95 mass %, and even more preferably 80 mass % to 93 mass %, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of more easily exhibiting the effect of the present invention.
- the lubricating oil composition according to the present embodiment contains the molybdenum-based friction modifier (B).
- the friction-reducing action can be improved.
- the friction-reducing action can be effectively exhibited in an environment where the temperature of the lubricating oil composition is high.
- any compound having a molybdenum atom can be used, and examples thereof include a molybdenum dithiocarbamate (MoDTC), a molybdenum dithiophosphate (MoDTP), and an amine salt of a molybdic acid.
- MoDTC molybdenum dithiocarbamate
- MoDTP molybdenum dithiophosphate
- an amine salt of a molybdic acid examples thereof include a molybdenum dithiocarbamate (MoDTC), a molybdenum dithiophosphate (MoDTP), and an amine salt of a molybdic acid.
- MoDTC molybdenum dithiocarbamate
- MoDTP molybdenum dithiophosphate
- MoDTC molybdenum dithiocarbamate
- MoDTC molybdenum dithiocarbamate
- MoDTC molybdenum dithiocarbamate
- binuclear molybdenum dithiocarbamate examples include a compound represented by the following general formula (B-1) and a compound represented by the following general formula (B-2).
- R 11 to R 14 each independently represent a hydrocarbon group, and R 11 to R 14 may be the same as or different from each other.
- X 11 to X 18 each independently represent an oxygen atom or a sulfur atom, and X 11 to X 18 may be the same as or different from each other. It should be noted that at least two of X 11 to X 18 in the formula (B-1) are sulfur atoms.
- the number of carbon atoms in the hydrocarbon group which may be selected as R 11 to R 14 is preferably 6 to 22.
- Examples of the hydrocarbon group which may be selected as R 11 to R 14 in the general formulae (B-1) and (B-2) include an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkylaryl group, and an arylalkyl group.
- alkyl group examples include a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, and an octadecyl group.
- alkenyl group examples include a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, an undecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, and a pentadecenyl group.
- cycloalkyl group examples include a cyclohexyl group, a dimethylcyclohexyl group, an ethylcyclohexyl group, a methylcyclohexylmethyl group, a cyclohexylethyl group, a propylcyclohexyl group, a butylcyclohexyl group, and a heptylcyclohexyl group.
- aryl group examples include a phenyl group, a naphthyl group, an anthracenyl group, a biphenyl group, and a terphenyl group.
- alkylaryl group examples include a tolyl group, a dimethylphenyl group, a butylphenyl group, a nonylphenyl group, and a dimethylnaphthyl group.
- arylalkyl group examples include a methylbenzyl group, a phenylmethyl group, a phenylethyl group, and a diphenylmethyl group.
- R 1 , R 2 , R 3 , and R 4 each independently represent an aliphatic hydrocarbon group having 4 to 22 carbon atoms.
- X 1 and X 2 are sulfur atoms, and X 3 and X 4 are oxygen atoms.
- R 1 , R 2 , R 3 , and R 4 each independently include a short-chain substituent group which is an aliphatic hydrocarbon group having 4 to 12 carbon atoms or a long-chain substituent group which is an aliphatic hydrocarbon group having 13 to 22 carbon atoms.
- Examples of the aliphatic hydrocarbon group having 4 to 12 carbon atoms which may be selected as the short-chain substituent group include an alkyl group having 4 to 12 carbon atoms and an alkenyl group having 4 to 12 carbon atoms.
- a butyl group a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, an undecenyl group, and a dodecenyl group.
- These groups may be linear or branched.
- the number of carbon atoms in the aliphatic hydrocarbon group which may be selected as the short-chain substituent group is preferably 5 to 11, more preferably 6 to 10, and even more preferably 7 to 9, from the viewpoint of more easily exhibiting the effect of the present invention.
- Examples of the aliphatic hydrocarbon group having 13 to 22 carbon atoms which may be selected as the long-chain substituent group include an alkyl group having 13 to 22 carbon atoms and an alkenyl group having 13 to 22 carbon atoms.
- Specific examples thereof include a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an eicosyl group, a heneicosyl group, a docosyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group, an octadecenyl group, an oleyl group, a nonadecenyl group, an icosenyl group, a heneicosenyl group, and a docosenyl group.
- These groups may be linear or branched.
- the number of carbon atoms in the aliphatic hydrocarbon group which may be selected as the long-chain substituent group is preferably 13 to 20, more preferably 13 to 16, and even more preferably 13 to 14, from the viewpoint of more easily exhibiting the effect of the present invention.
- a molar ratio (the short-chain substituent group:the long-chain substituent group) of the short-chain substituent group to the long-chain substituent group in all molecules of the molybdenum dialkyldithiocarbamate represented by the structural formula (1) is preferably 10:90 to 90:10, more preferably 30:70 to 70:30, and even more preferably 40:60 to 60:40.
- Examples of the trinuclear molybdenum dithiocarbamate include a compound represented by the following general formula (B-4).
- k is an integer of 1 or more
- m is an integer of 0 or more
- k+m is an integer of 4 to 10, preferably an integer of 4 to 7.
- n is an integer of 1 to 4
- p is an integer of 0 or more.
- Z is an integer of 0 to 5, and includes a nonstoichiometric value.
- E's each independently represent an oxygen atom or a selenium atom, and for example, can substitute sulfur in cores described later.
- L's each independently represent an anionic ligand having an organic group having a carbon atom, the total number of carbon atoms in the organic group in each ligand is 14 or more, and the ligands may be the same as or different from each other.
- A's each independently represent an anion other than L.
- Q's each independently represent an electron donating neutral compound and is present to fill an empty coordination in the trinuclear molybdenum compound.
- a content of the molybdenum-based friction modifier (B) is preferably 0.10 mass % or more and 5.0 mass % or less, more preferably 0.30 mass % or more and 3.0 mass % or less, and even more preferably 0.50 mass % or more and 1.5 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing a metal-to-metal friction coefficient and obtaining excellent fuel consumption reducing properties.
- a content of a molybdenum atom derived from the molybdenum-based friction modifier (B) is preferably 0.01 mass % or more, more preferably 0.03 mass % or more, even more preferably 0.04 mass % or more, and still more preferably 0.05 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of improving the friction-reducing action.
- the content of the molybdenum atom derived from the molybdenum-based friction modifier (B) is preferably 0.20 mass % or less, more preferably 0.15 mass % or less, even more preferably 0.12 mass % or less, and still more preferably 0.10 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing a sulfated ash content.
- the lubricating oil composition according to the present embodiment contains the metal-based detergent (C).
- the metal-based detergent (C) When the lubricating oil composition contains the metal-based detergent (C), high-temperature detergency and dispersibility can be improved.
- Examples of the metal-based detergent (C) include an organic acid metal salt compound containing a metal atom selected from an alkali metal and an alkaline earth metal, and specific examples thereof include a metal salicylate, a metal phenate, and a metal sulfonate each containing a metal atom selected from an alkali metal and an alkaline earth metal.
- alkali metal refers to lithium, sodium, potassium, rubidium, cesium, and francium.
- alkaline earth metal refers to beryllium, magnesium, calcium, strontium, and barium.
- the metal atom contained in the metal-based detergent (C) is preferably sodium, calcium, magnesium, or barium, and more preferably calcium or magnesium, from the viewpoint of improving high-temperature detergency.
- the metal salicylate is preferably a compound represented by the following general formula (c-1), the metal phenate is preferably a compound represented by the following general formula (c-2), and the metal sulfonate is preferably a compound represented by the following general formula (c-3).
- M is a metal atom selected from an alkali metal and an alkaline earth metal, and is preferably sodium, calcium, magnesium, or barium, and more preferably calcium or magnesium.
- M E is an alkaline earth metal, and is preferably calcium, magnesium, or barium, and more preferably calcium or magnesium.
- q is a valence of M, and is 1 or 2.
- R 31 and R 32 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms.
- S represents a sulfur atom.
- r is an integer of 0 or more, and is preferably an integer of 0 to 3.
- Examples of the hydrocarbon group which may be selected as R 31 and R 32 include an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 1 to 18 carbon atoms, a cycloalkyl group having 3 to 18 ring carbon atoms, an aryl group having 6 to 18 ring carbon atoms, an alkylaryl group having 7 to 18 carbon atoms, and an arylalkyl group having 7 to 18 carbon atoms.
- calcium salicylate, calcium phenate, calcium sulfonate, magnesium salicylate, magnesium phenate, and magnesium sulfonate are preferred, from the viewpoint of improving high-temperature detergency and dispersibility and the viewpoint of solubility in the base oil.
- the metal-based detergent (C) may be any of a neutral salt, a basic salt, an overbased salt, and a mixture thereof.
- Abase number of the metal-based detergent (C) is preferably 0 mgKOH/g to 600 mgKOH/g.
- the base number of the metal-based detergent is preferably 10 mgKOH/g to 600 mgKOH/g, and more preferably 20 mgKOH/g to 500 mgKOH/g.
- base number refers to a base number measured by a perchloric acid method in accordance with section 7 of JIS K 2501:2003 “Petroleum products and lubricants-Determination of neutralization number”.
- a content of the metal-based detergent (C) is preferably 0.01 mass % to 10 mass %, more preferably 0.1 mass % to 5.0 mass %, even more preferably 0.2 mass % to 3.0 mass %, and still more preferably 0.3 mass % to 2.0 mass %, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of more easily exhibiting the effect of the present invention.
- the metal-based detergent (C) may be used alone or may be used in combination of two or more thereof.
- a suitable total content in the case of using two or more thereof is also the same as the content described above.
- a content of a calcium atom derived from the metal-based detergent (C) is preferably 0.05 mass % or more, more preferably 0.10 mass % or more, and even more preferably 0.11 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of high-temperature detergency and dispersibility.
- the content of the calcium atom derived from the metal-based detergent (C) is preferably 0.50 mass % or less, more preferably 0.40 mass % or less, even more preferably 0.30 mass % or less, still more preferably 0.20 mass % or less, even still more preferably 0.15 mass % or less, and yet still more preferably 0.13 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing a sulfated ash content and the viewpoint of preventing LSPI (abnormal combustion).
- a content of a magnesium atom derived from the metal-based detergent (C) is preferably 0.02 mass % or more, more preferably 0.03 mass % or more, and even more preferably 0.04 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of high-temperature detergency and dispersibility.
- the content of the magnesium atom derived from the metal-based detergent (C) is preferably 0.07 mass % or less, more preferably 0.06 mass % or less, and even more preferably 0.05 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing a sulfated ash content and the viewpoint of preventing LSPI (abnormal combustion).
- the lubricating oil composition according to the present embodiment contains the dispersant (D).
- the dispersant (D) contains the non-boron-modified polyisobutenyl succinic bisimide (D1).
- the lubricating oil composition contains the dispersant (D) containing the non-boron-modified polyisobutenyl succinic bisimide (D1), high-temperature detergency and dispersibility can be maintained over a long period of time.
- the dispersant (D) contains the non-boron-modified polyisobutenyl succinic bisimide (D1).
- the lubricating oil composition according to the present embodiment does not contain the non-boron-modified polyisobutenyl succinic bisimide (D1), it is not possible to maintain the high-temperature detergency and dispersibility for a long period of time.
- non-boron-modified polyisobutenyl succinic bisimide (D1) a non-boron-modified succinimide compound (D1y) represented by the following general formula (d-1y) is preferred.
- R A1 and R A2 each independently represent a polyisobutenyl group.
- a mass average molecular weight (Mw) of the polyisobutenyl group is preferably 500 to 4,000, more preferably 900 to 3,000, even more preferably 1,300 to 2,800, and still more preferably 1,800 to 2,600.
- the mass average molecular weight (Mw) of the polyisobutenyl group can be evaluated as a mass average molecular weight (Mw) in terms of standard polystyrene by measuring, for example, a polyolefin, which is a generation source of the alkenyl group, using a GPC apparatus (apparatus name: HLC-8220, manufactured by Tosoh Corporation) with columns (product name: TSK gel GMH-XL, two, product name: G2000H-XL, one, manufactured by Tosoh Corporation) attached under conditions of a detector: a refractive index detector, a measurement temperature: 40° C., a mobile phase: tetrahydrofuran, a flow rate: 1.0 mL/min, and a concentration of 0.5 mg/mL.
- a GPC apparatus apparatus (apparatus name: HLC-8220, manufactured by Tosoh Corporation) with columns (product name: TSK gel GMH-XL, two, product name: G2000H
- a value obtained by subtracting, from a mass average molecular weight of the non-boron-modified polyisobutenyl succinic bisimide (D1) measured by the same measurement method as described above, a theoretical molecular weight of the corresponding structure other than the polyisobutenyl group, and then dividing the resulting value by the number of polyisobutenyl groups contained in one molecule may be determined as the mass average molecular weight (Mw) of the polyisobutenyl group.
- R B1 and R B2 each independently represent an alkylene group having 2 to 5 carbon atoms.
- alkylene group examples include a methylene group, an ethylene group, a trimethylene group, various butylene groups, and various pentylene groups.
- the term “various” in various butylene groups and the like is meant to include linear groups, branched groups, and isomers thereof.
- R C represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or a group represented by -(AO) n —H (where A represents an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 1 to 10).
- alkyl group examples include a linear or branched alkyl group, such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a 1,1-dimethylhexyl group, a 2-ethylhexyl group, a nonyl group, a 1,1-dimethylheptyl group, and a decyl group.
- a linear or branched alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a 1,1-dimethylhexyl group, a 2-ethylhexyl group, a nonyl group, a
- Examples of the alkylene group having 2 to 4 carbon atoms and represented by A include an ethylene group, a trimethylene group, and various butylene groups, and an ethylene group is preferred.
- n is an integer of 1 to 10, preferably an integer of 1 to 5, and more preferably an integer of 1 to 3.
- x2 is an integer of 1 to 10, preferably an integer of 3 to 7, and more preferably 5 or 6.
- non-boron-modified polyisobutenyl succinic bisimide (D1) a non-boron-modified succinimide compound (D1x) may be used alone or in combination of plural kinds thereof.
- the non-boron-modified polyisobutenyl succinic bisimide (D1) can be produced, for example, by reacting an isobutenyl succinic anhydride obtained by a reaction between polyisobutylene and maleic anhydride with a polyamine to prepare an alkenyl succinimide having an active amine hydrogen (a compound in which R c in the general formula (d-1y) is a hydrogen atom).
- the non-boron-modified polyisobutenyl succinic bisimide (D1) can be produced by substituting at least a part of the active amine hydrogen with the group represented by R c .
- polyamines examples include: single diamines such as ethylenediamine, propylenediamine, butylenediamine, and pentylenediamine; polyalkylene polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, di(methylethylene)triamine, dibutylenetriamine, tributylenetetramine, and pentapentylenehexamie; and piperazine derivatives such as aminoethylpiperazine.
- single diamines such as ethylenediamine, propylenediamine, butylenediamine, and pentylenediamine
- polyalkylene polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, di(methylethylene)triamine, dibutylenetriamine, tributylenetetramine, and pentapentylenehexamie
- piperazine derivatives such as aminoe
- substitution reaction of the active amine hydrogen for example, a known method can be used, and examples thereof include a method of reacting an alkenyl succinimide compound having the active amine hydrogen with an alkyl halide giving R c in the general formula (d-1y).
- the ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of the peak intensity Abs (1705 cm ⁇ 1 ) at 1705 cm ⁇ 1 to the peak intensity Abs (1390 cm ⁇ 1 ) at 1390 cm ⁇ 1 is 7.5 or less.
- the ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] is preferably 5.0 or more and 7.5 or less, more preferably 6.0 or more and 7.3 or less, and even more preferably 6.5 or more and 7.1 or less, from the viewpoint of further improving the friction-reducing action of the molybdenum-based friction modifier (B).
- the IR spectrum can be determined by a measuring instrument using the FT-IR method under known conditions. Specifically the measurement can be performed by a method described in Examples described later.
- a content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is 50 mass % or more, preferably 50 mass % or more and 95 mass % or less, more preferably 63 mass % or more and 85 mass % or less, and even more preferably 65 mass % or more and 80 mass % or less, based on the total amount (100 mass %) of the dispersant (D).
- the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is less than 50 mass % based on the total amount (100 mass %) of the dispersant (D), a sufficient friction-reducing effect cannot be obtained.
- the content of the component (D1) is preferably 0.10 mass % or more and 4.0 mass % or less, more preferably 1.5 mass % or more and 3.0 mass % or less, and even more preferably 1.6 mass % or more and 2.0 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of further improving the friction-reducing action.
- the dispersant (D) may further contain the non-boron-modified succinimide (D2) other than the component (D1).
- the molybdenum-based friction modifier (B) cannot sufficiently exhibit the friction-reducing action even when the dispersant (D) contains the non-boron-modified succinimide (D2) other than the component (D1).
- the non-boron-modified succinimide (D2) other than the component (D1) is preferably one or more non-boron-modified succinimide compounds (D2z) selected from a succinic monoimide (D2x) represented by the following general formula (d-2x) and a succinic bisimide (D2y) represented by the following general formula (d-2y).
- R A , R A1 , and R A2 each independently represent an alkenyl group.
- alkenyl group examples include a polybutenyl group, a polyisobutenyl group, and an ethylene-propylene copolymer. Among them, a polybutenyl group and a polyisobutenyl group are preferred, and a polyisobutenyl group is more preferred.
- a mass average molecular weight (Mw) of the alkenyl group is preferably 500 to 4,000, more preferably 900 to 3,000, even more preferably 1,300 to 2,800, and still more preferably 1,800 to 2,600.
- the mass average molecular weight (Mw) of the alkenyl group can be determined by the method described in the component (D1).
- R B , R B1 , and R B2 each independently represent an alkylene group having 2 to 5 carbon atoms.
- alkylene group examples include a methylene group, an ethylene group, a trimethylene group, various butylene groups, and various pentylene groups.
- the term “various” in various butylene groups and the like is meant to include linear groups, branched groups, and isomers thereof.
- R C represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or a group represented by -(AO) n —H (where A represents an alkylene group having 2 to 4 carbon atoms, and n represents an integer of 1 to 10).
- alkyl group examples include a linear or branched alkyl group, such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a 1,1-dimethylhexyl group, a 2-ethylhexyl group, a nonyl group, a 1,1-dimethylheptyl group, and a decyl group.
- a linear or branched alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a 1,1-dimethylhexyl group, a 2-ethylhexyl group, a nonyl group, a
- Examples of the alkylene group having 2 to 4 carbon atoms and represented by A include an ethylene group, a trimethylene group, and various butylene groups, and an ethylene group is preferred.
- n is an integer of 1 to 10, preferably an integer of 1 to 5, and more preferably an integer of 1 to 3.
- x1 is an integer of 1 to 10, preferably an integer of 2 to 5, and more preferably 3 or 4.
- x2 is an integer of 1 to 10, preferably an integer of 3 to 7, and more preferably 5 or 6.
- the succinic monoimide (D2x) may be used alone or in combination of plural kinds thereof.
- the succinic bisimide (D2x) may be used alone or in combination of plural kinds thereof.
- one or more succinic monoimides (D2x) and one or more succinic bisimides (D2x) may be used in combination.
- the non-boron-modified succinimide compound (D2x) can be produced, for example, by reacting an alkenyl succinic anhydride obtained by a reaction between a polyolefin and maleic anhydride with a polyamine to prepare an alkenyl succinicimide having an active amine hydrogen (a compound in which R c in the general formula (d-2x) or the general formula (d-2y) is a hydrogen atom).
- the non-boron-modified succinimide compound (D2x) can be produced by substituting at least a part of the active amine hydrogen with the group represented by R c .
- polystyrene resin examples include a polymer obtained by polymerizing one or more selected from ⁇ -olefins each having 2 to 8 carbon atoms, and a copolymer of isobutene and 1-butene is preferred.
- polyamines examples include: single diamines such as ethylenediamine, propylenediamine, butylenediamine, and pentylenediamine; polyalkylene polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, di(methylethylene)triamine, dibutylenetriamine, tributylenetetramine, and pentapentylenehexamie; and piperazine derivatives such as aminoethylpiperazine.
- single diamines such as ethylenediamine, propylenediamine, butylenediamine, and pentylenediamine
- polyalkylene polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, di(methylethylene)triamine, dibutylenetriamine, tributylenetetramine, and pentapentylenehexamie
- piperazine derivatives such as aminoe
- substitution reaction of the active amine hydrogen may be performed by a known method, and examples of the method include a method of reacting an alkenyl succinimide compound having the active amine hydrogen with an alkyl halide giving R c in the general formulae (d-2x) and (d-2y).
- a content of the component (D2) is preferably 0.10 mass % or more and 2.0 mass % or less, more preferably 0.30 mass % or more and 1.5 mass % or less, and even more preferably 0.50 mass % or more and 1.0 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of maintaining high-temperature detergency.
- a ratio [(D1)/(D2)] of the content of the component (D1) to the content of the component (D2) is preferably 1 or more, and more preferably 2 or more in terms of mass ratio, from the viewpoint of further improving the friction-reducing action.
- the dispersant (D) may further contain the boron-modified succinimide (D3).
- the molybdenum-based friction modifier (B) cannot exhibit the friction-reducing action even when the dispersant (D) contains the boron-modified succinimide (D3).
- the dispersant (D) contains the component (D1) and the component (D3), the effect of maintaining high-temperature detergency and dispersibility over a long period of time can be more easily exhibited.
- the boron-modified succinimide (D3) is preferably one or more selected from a boron-modified product of the non-boron-modified polyisobutenyl succinic bisimide (D1) and a boron-modified product of the non-boron-modified succinimide (D2).
- the component (D3) is preferably a boron-modified product of one or more non-boron-modified succinimide compounds (D2z) selected from the succinic monoimide (D2x) represented by the general formula (d-2x) and the succinic bisimide (D2y) represented by the general formula (d-2y).
- a content of the component (D3) is preferably 0.10 mass % or more and 3.0 mass % or less, more preferably 0.20 mass % or more and 2.0 mass % or less, and still more preferably 0.20 mass % or more and 1.5 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of maintaining high-temperature detergency.
- a content of a boron atom derived from the boron-modified succinimide (D3) is preferably 0.03 mass % or less, and more preferably 0.001 mass % or more and 0.02 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition.
- the content of the boron atom derived from the boron-modified succinimide (D3) is 0.03 mass % or less, an increase in the kinematic viscosity at 40° C. can be prevented, and thus fuel consumption reducing properties can be improved.
- a ratio [(D1)/(D3)] of the content of the component (D1) to the content of the component (D3) is preferably 1 or more, more preferably 8 or more, even more preferably 9 or more, and still more preferably 11 or more in terms of mass ratio, from the viewpoint of further improving the friction-reducing action.
- a ratio of a content of a nitrogen atom derived from the non-boron-modified polyisobutenyl succinic bisimide (D1) to the content of the boron atom derived from the boron-modified succinimide (D3) is preferably 1 or more, more preferably 3 or more, and even more preferably 4 or more in terms of mass ratio, from the viewpoint of further improving the friction-reducing action.
- the content of the dispersant (D) is preferably 0.10 mass % or more and 5.0 mass % or less, more preferably 2.60 mass % or more and 4.0 mass % or less, and even more preferably 3.2 mass % or more and 3.6 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of maintaining high-temperature detergency.
- a content of a nitrogen atom derived from the total dispersant (D) is preferably 0.01 mass % or more, and more preferably 0.02 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of maintaining high-temperature detergency and dispersibility over a long period of time.
- the content of the nitrogen atom derived from the total dispersant (D) is preferably 0.10 mass % or less, more preferably 0.07 mass % or less, even more preferably 0.06 mass % or less, still more preferably 0.05 mass % or less, and even still more preferably 0.04 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition.
- the content of the nitrogen atom can be measured in accordance with JIS K 2609:1998.
- a ratio [(D1)/(B)-Mo] of the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) to a content of a molybdenum atom derived from the molybdenum-based friction modifier (B) is, in terms of mass ratio, preferably 15 or more and 90 or less, more preferably 20 or more and 80 or less, even more preferably 30 or more and 70 or less, and still more preferably 40 or more and 60 or less, from the viewpoint of improving the friction-reducing action and maintaining high-temperature detergency.
- the lubricating oil composition according to the present embodiment may contain other components than the above components as long as the effects of the present invention are not impaired.
- additives as the other components include a pour point depressant, an antioxidant, an anti-wear agent, a friction modifier other than the molybdenum-based friction modifier (B), an extreme pressure agent, a viscosity index improver, a rust inhibitor, an anti-foaming agent, an oiliness improver, a metal deactivator, and a demulsifier.
- pour point depressant examples include an ethylene-vinyl acetate copolymer, a condensate of a chlorinated paraffin and naphthalene, a condensate of a chlorinated paraffin and phenol, a polymethacrylate-based pour point depressant (a PMA-based pour point depressant; a polyalkyl (meth)acrylate, and the like), a polyvinyl acetate, polybutene, and a polyalkylstyrene.
- a polymethacrylate-based pour point depressant is preferably used.
- antioxidant examples include an amine-based antioxidant and a phenol-based antioxidant.
- amine-based antioxidant examples include diphenylamine-based antioxidants such as diphenylamine and an alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms, and naphthylamine-based antioxidants such as phenyl- ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, a substituted phenyl- ⁇ -naphthylamine having an alkyl group having 3 to 20 carbon atoms, and a substituted phenyl- ⁇ -naphthylamine having an alkyl group having 3 to 20 carbon atoms.
- diphenylamine-based antioxidants such as diphenylamine and an alkylated diphenylamine having an alkyl group having 3 to 20 carbon atoms
- naphthylamine-based antioxidants such as phenyl- ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, a
- phenol-based antioxidant examples include monophenol-based antioxidants such as 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, isooctyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, diphenol-based antioxidants such as 4,4′-methylenebis(2,6-di-tert-butylphenol) and 2,2′-methylenebis(4-ethyl-6-tert-butylphenol), and hindered phenol-based antioxidants.
- monophenol-based antioxidants such as 2,6-di-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl
- anti-wear agent examples include: zinc-containing compounds such as a zinc dialkyldithiophosphate (ZnDTP) and zinc phosphate; sulfur-containing compounds such as disulfides, sulfurized olefins, sulfurized oils and fats, sulfurized esters, thiocarbonates, thiocarbamates, and polysulfides; phosphorus-containing compounds such as phosphite esters, phosphate esters, phosphonate esters, and an amine salt or a metal salt thereof, and sulfur- and phosphorus-containing anti-wear agents such as thiophosphite esters, thiophosphate esters, thiophosphonate esters, and an amine salt or a metal salt thereof.
- ZnDTP zinc dialkyldithiophosphate
- sulfur-containing compounds such as disulfides, sulfurized olefins, sulfurized oils and fats, sulfurized esters, thiocarbonates, thiocarbamates, and polysulf
- ZnDTP zinc dialkyldithiophosphate
- the lubricating oil composition according to the present embodiment may contain a friction modifier other than the component (B).
- the component (B) is excellent in effectively exhibiting the friction-reducing action in an environment where the temperature of the lubricating oil composition is high, and when the lubricating oil composition contains a friction modifier other than the component (B), the friction-reducing action can be effectively exhibited even in an environment where the temperature of the lubricating oil composition is low.
- Examples of the friction modifier other than the molybdenum-based friction modifier (B) include ash-free friction modifiers such as an aliphatic amine, a fatty acid ester, a fatty acid amide, a fatty acid, an aliphatic alcohol, and an aliphatic ether, fats and oils, an amine, an amide, a sulfurized ester, a phosphate ester, a phosphite ester, and an amine salt of a phosphate ester.
- ash-free friction modifiers such as an aliphatic amine, a fatty acid ester, a fatty acid amide, a fatty acid, an aliphatic alcohol, and an aliphatic ether, fats and oils, an amine, an amide, a sulfurized ester, a phosphate ester, a phosphite ester, and an amine salt of a phosphate ester.
- an aliphatic amine is preferred, and among the aliphatic amine, an aliphatic amine having at least one alkyl group or alkenyl group having 2 to 30 carbon atoms in a molecule thereof is preferred.
- a diethanolamine compound represented by the following general formula (5) is preferred.
- R 1 is a monovalent aliphatic hydrocarbon group having 12 to 30 carbon atoms.
- Preferred examples of the aliphatic hydrocarbon group having 12 to 30 carbon atoms and represented by R 1 include a linear or branched alkyl group having 12 to 30 carbon atoms and a linear or branched alkenyl group having 12 to 30 carbon atoms.
- the number of carbon atoms in these groups is more preferably 12 to 24, and even more preferably 16 to 20.
- linear or branched alkyl group having 12 to 30 carbon atoms examples include various dodecyl groups such as an n-dodecyl group, an isododecyl group, a sec-dodecyl group, a tert-dodecyl group, and a neododecyl group (hereinafter, a functional group having a predetermined number of carbon atoms and including a linear group, a branched group, and an isomer thereof may be abbreviated as “various functional groups”), various tridecyl groups, various tetradecyl groups, various pentadecyl groups, various hexadecyl groups, various heptadecyl groups, various octadecyl groups, various nonadecyl groups, various eicosyl groups, various heneicosyl groups, various docosyl groups, various tricosyl groups, various tetracosyl groups
- Examples of the linear or branched alkenyl group having 12 to 30 carbon atoms include various dodecenyl groups, various tridecenyl groups, various tetradecenyl groups, various pentadecenyl groups, various hexadecenyl groups, various heptadecenyl groups, various octadecenyl groups, various nonadecenyl groups, various icosenyl groups, various heneicosenyl groups, various docosenyl groups, various tricosenyl groups, various tetracosenyl groups, various pentacosenyl groups, various hexacosenyl groups, various heptacosenyl groups, various octacosenyl groups, various nonacosenyl groups, and various triaconyl groups.
- various hexadecyl groups, various heptadecyl groups, and various octadecyl groups which are alkyl groups having 16 to 18 carbon atoms
- various hexadecenyl groups, various heptadecenyl groups, and various octadecenyl groups, which are alkenyl groups having 16 to 18 carbon atoms more preferred are various hexadecyl groups, various octadecyl groups, and various octadecenyl groups
- an n-hexadecyl group palmityl group
- an n-octadecyl group stearyl group
- an n-octadecenyl group oleyl group
- Preferred specific examples of the diethanolamine compound represented by the general formula (5) include one or more compounds selected from stearyl diethanolamine (in the general formula (5), R 1 is an n-octadecyl group (stearyl group)), oleyl diethanolamine (in the general formula (5), R 1 is an n-octadecenyl group (oleyl group)), and palmityl diethanolamine (in the general formula (5), R 1 is an n-hexadecyl group (palmityl group)).
- stearyl diethanolamine in the general formula (5), R 1 is an n-octadecyl group (stearyl group)
- oleyl diethanolamine in the general formula (5), R 1 is an n-octadecenyl group (oleyl group)
- palmityl diethanolamine in the general formula (5), R 1 is an n-hexadecyl group (palmityl group)
- extreme pressure agent examples include sulfur-based extreme pressure agents such as sulfides, sulfoxides, sulfones, and thiophosphinates, halogen-based extreme pressure agents such as a chlorinated hydrocarbon, and organic metal-based extreme pressure agents.
- sulfur-based extreme pressure agents such as sulfides, sulfoxides, sulfones, and thiophosphinates
- halogen-based extreme pressure agents such as a chlorinated hydrocarbon
- organic metal-based extreme pressure agents organic metal-based extreme pressure agents.
- a compound having a function as an extreme pressure agent can also be used.
- the viscosity index improver examples include polymers such as a non-dispersant-type poly(meth)acrylate, a dispersant-type poly(meth)acrylate, a star polymer, an olefin-based copolymer (for example, an ethylene-propylene copolymer), a dispersant-type olefin-based copolymer, and a styrene-based copolymer (for example, a styrene-diene copolymer and a styrene-isoprene copolymer).
- a polymethacrylate and a star polymer are preferred.
- a mass average molecular weight (Mw) of the viscosity index improver is preferably 10,000 to 1,000,000, preferably 15,000 to 800,000, and more preferably 200,000 to 700,000, and is appropriately set depending on the type of the polymer.
- the mass average molecular weight (Mw) of each component is a value in terms of standard polystyrene determined by gel permeation chromatography (GPC).
- a permanent shear stability index (PSSI) of the viscosity index improver is preferably 40.0 or less, more preferably 35.0 or less, and even more preferably 30.0 or less.
- the lower limit value of the SSI of the viscosity index improver is not particularly limited, and is generally 0.1 or more, preferably 0.2 or more, and more preferably 0.5 or more, from the viewpoint of stable presence of the viscosity index improver.
- the permanent shear stability index (PSSI) of the viscosity index improver is a value calculated in accordance with ASTM D6022-06, which indicates, in percentage, a decrease in viscosity due to shearing caused by a resin component in the viscosity index improver. More specifically the PSSI is a value calculated according to the following calculation formula.
- Kv 0 represents a value of a kinematic viscosity at 100° C. of a sample oil obtained by diluting a viscosity index improver containing a resin component with a mineral oil
- Kv 1 represents a value of a kinematic viscosity at 100° C. after passing the sample oil obtained by diluting the viscosity index improver containing the resin component with the mineral oil through a high-shear diesel injector for 30 cycles according to the procedures of ASTM D6278.
- Kv oil represents a value of a kinematic viscosity at 100° C. of a mineral oil used for diluting the viscosity index improver.
- rust inhibitor examples include a fatty acid, an alkenyl succinic acid half ester, a fatty acid soap, an alkyl sulfonate salt, a polyhydric alcohol fatty acid ester, a fatty acid amine, an oxidized paraffin, and an alkyl polyoxyethylene ether.
- anti-foaming agent examples include silicone oils such as a dimethylpolysiloxane, fluorosilicone oils, and fluoroalkyl ethers.
- oiliness improver examples include: an aliphatic saturated or unsaturated monocarboxylic acid such as stearic acid and oleic acid; a polymerized fatty acid such as a dimer acid and a hydrogenated dimer acid; a hydroxy fatty acid such as ricinoleic acid and 12-hydroxystearic acid; an aliphatic saturated or unsaturated monoalcohol such as lauryl alcohol and oleyl alcohol; an aliphatic saturated or unsaturated monoamine such as stearylamine and oleylamine; an aliphatic saturated or unsaturated monocarboxylic acid amide such as lauric acid amide and oleic acid amide; and a partial ester of a polyhydric alcohol such as glycerin or sorbitol and an aliphatic saturated or unsaturated monocarboxylic acid.
- a polyhydric alcohol such as glycerin or sorbitol and an aliphatic saturated or unsaturated monocarboxylic
- the metal deactivator examples include a benzotriazole-based compound, a tolyltriazole-based compound, a thiadiazole-based compound, an imidazole-based compound, and a pyrimidine-based compound.
- the demulsifier examples include: an anionic surfactant such as a castor oil sulfate ester salt and a petroleum sulfonate salt; a cationic surfactant such as a quaternary ammonium salt and imidazolines; a polyalkylene glycol-based nonionic surfactant such as a polyoxyethylene alkyl ether, a polyoxyethylene alkyl phenyl ether, and a polyoxyethylene alkyl naphthyl ether; a polyoxyalkylene polyglycol and an ester of a dicarboxylic acid thereof; and an alkylene oxide adduct of an alkylphenol-formaldehyde polycondensate.
- an anionic surfactant such as a castor oil sulfate ester salt and a petroleum sulfonate salt
- a cationic surfactant such as a quaternary ammonium salt and imidazolines
- a content of the other components described above can be properly regulated within the range where the effects of the present invention are not impaired, and the content of each of the other components is generally 0.001 mass % to 15 mass %, preferably 0.005 mass % to 10 mass %, more preferably 0.01 mass % to 7 mass %, and even more preferably 0.03 mass % to 5 mass %, based on the total amount (100 mass %) of the lubricating oil composition.
- additives as the other components may be blended with other components in the form of a solution diluted and dissolved in a part of the base oil (A) in consideration of handling properties, solubility in the base oil (A), and the like.
- the above-described content of the additives as the other components means a content in terms of an active component (in terms of a resin component) excluding the diluent oil.
- a kinematic viscosity at 40° C. of the lubricating oil composition according to the present embodiment is preferably 2.0 mm 2 /s or more and 150.0 mm 2 /s or less, more preferably 2.0 mm 2 /s or more and 100.0 mm 2 /s or less, even more preferably 2.0 mm 2 /s or more and 60.0 mm 2 /s or less, still more preferably 2.0 mm 2 /s or more and 40.0 mm 2 /s or less, and even still more preferably 2.0 mm 2 /s or more and 30.0 mm 2 /s or less, from the viewpoint of improving fuel consumption reducing properties for the upper limit value and from the viewpoint of reducing a loss of the lubricating oil composition due to evaporation and ensuring oil film retention for the lower limit value.
- a kinematic viscosity at 100° C. of the lubricating oil composition according to the present embodiment is preferably 2.0 mm 2 /s or more, more preferably 3.0 mm 2 /s or more, even more preferably 4.1 mm 2 /s or more, and still more preferably 4.5 mm 2 /s or more.
- the lubricating oil composition according to the present embodiment is 9.3 mm 2 /s or less, preferably 9.0 mm 2 /s or less, more preferably 8.5 mm 2 /s or less, even more preferably 7.5 mm 2 /s or less, still more preferably 7.1 mm 2 /s, even still more preferably 6.1 mm 2 /s or less, and yet still more preferably 5.8 mm 2 /s or less.
- the kinematic viscosity at 100° C. is within the above range, it is easier to ensure fuel consumption reducing properties.
- a viscosity index of the lubricating oil composition according to the present embodiment is preferably 110 or more, more preferably 120 or more, even more preferably 130 or more, and still more preferably 135 or more. When the viscosity index is within the above range, a change in viscosity due to the temperature becomes small.
- the kinematic viscosity at 40° C., the kinematic viscosity at 100° C., and the viscosity index can be measured or calculated in accordance with JIS K 2283:2000.
- HTHS viscosity is a viscosity measured under conditions of a high temperature (150° C.) and a shear rate of 10 6 S ⁇ 1 .
- An HTHS viscosity at 150° C. (150° C. HTHS viscosity) of the lubricating oil composition according to the present embodiment is preferably 1.0 mPa ⁇ s or more and 2.9 mPa ⁇ s or less, more preferably 1.3 mPa ⁇ s or more and 2.6 mPa ⁇ s or less, even more preferably 1.5 mPa ⁇ s or more and 2.3 mPa ⁇ s or less, still more preferably 1.7 mPa s or more and 2.0 mPa s or less, and even still more preferably 1.8 mPa ⁇ s or more and 1.9 mPa ⁇ s or less, from the viewpoint of fuel consumption reducing properties.
- the HTHS viscosity at 150° C. is within the above range, the viscosity resistance of the lubricating oil composition is small, the energy loss is also small, and thus it is easier to improve fuel consumption reducing properties.
- the HTHS viscosity at 150° C. can be measured or calculated in accordance with JPI-5S-36-03.
- the sulfated ash content in the lubricating oil composition according to the present embodiment is preferably 1.0 mass % or less, more preferably 0.9 mass % or less, and even more preferably 0.8 mass % or less, from the viewpoint of preventing clogging of a particulate filter and the like.
- the sulfated ash content is 0.01 mass % or more.
- the sulfated ash content can be measured in accordance with JIS K 2272:1998.
- the content of the molybdenum atom in the lubricating oil composition according to the present embodiment is preferably 0.01 mass % or more, more preferably 0.03 mass % or more, even more preferably 0.04 mass % or more, and still more preferably 0.05 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of improving the friction-reducing action.
- the content of the molybdenum atom is preferably 0.20 mass % or less, more preferably 0.15 mass % or less, even more preferably 0.12 mass % or less, and still more preferably 0.10 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing the sulfated ash content.
- the content of the calcium atom in the lubricating oil composition according to the present embodiment is preferably 0.05 mass % or more, more preferably 0.08 mass % or more, and even more preferably 0.10 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of high-temperature detergency and dispersibility.
- the content of the calcium atom is preferably 0.50 mass % or less, more preferably 0.40 mass % or less, even more preferably 0.30 mass % or less, still more preferably 0.20 mass % or less, even still more preferably 0.15 mass % or less, and yet still more preferably 0.14 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing the sulfated ash content and the viewpoint of preventing LSPI (abnormal combustion).
- the content of the magnesium atom in the lubricating oil composition according to the present embodiment is preferably 0.02 mass % or more, more preferably 0.03 mass % or more, and even more preferably 0.04 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of high-temperature detergency and dispersibility.
- the content of the magnesium atom is preferably 0.07 mass % or less, more preferably 0.06 mass % or less, and even more preferably 0.05 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of reducing a sulfated ash content and the viewpoint of preventing LSPI (abnormal combustion).
- the content of the boron atom is generally 0.001 mass % or more based on the total amount (100 mass %) of the lubricating oil composition.
- the content of the boron atom is preferably 0.10 mass % or less, more preferably 0.08 mass % or less, even more preferably 0.06 mass % or less, still more preferably 0.04 mass % or less, even still more preferably 0.03 mass % or less, and yet still more preferably 0.02 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition.
- a content of a phosphorus atom in the lubricating oil composition according to the present embodiment is preferably 0.01 mass % or more, more preferably 0.03 mass % or more, and even more preferably 0.06 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition.
- the content of the phosphorus atom is preferably 0.12 mass % or less, more preferably 0.11 mass % or less, and even more preferably 0.10 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of preventing poisoning of an exhaust gas post-treatment device.
- the contents of the molybdenum atom, the calcium atom, the magnesium atom, the boron atom, and the phosphorus atom can be measured in accordance with JPI-5S-38-03.
- the content of the nitrogen atom in the lubricating oil composition according to the present embodiment is preferably 0.03 mass % or more, and more preferably 0.04 mass % or more, based on the total amount (100 mass %) of the lubricating oil composition, from the viewpoint of maintaining high-temperature detergency and dispersibility over a long period of time.
- the content of the nitrogen atom is preferably 0.20 mass % or less, more preferably 0.15 mass % or less, even more preferably 0.10 mass % or less, and still more preferably 0.09 mass % or less, based on the total amount (100 mass %) of the lubricating oil composition.
- the content of the nitrogen atom can be measured in accordance with JIS K 2609:1998.
- the friction coefficient of the lubricating oil composition according to the present embodiment can be evaluated using, for example, an SRV tester (manufactured by Optimol). Specifically the evaluation can be performed by a method described in Examples described later.
- the friction coefficient in the method described in Examples described later is preferably 0.085 or less, and more preferably 0.080 or less.
- the high-temperature detergency and dispersibility of the lubricating oil composition according to the present embodiment can be evaluated, for example, by blowing NO X gas into a lubricating oil composition immediately after preparation to subject the lubricating oil composition to a deterioration treatment, and subjecting the deteriorated lubricating oil composition to a hot tube test.
- This evaluation result can also be said to reflect the maintainability of the high-temperature detergency and dispersibility of the lubricating oil composition.
- the evaluation can be performed by a method described in Examples described later.
- scores 0 to 10 of the hot tube test in the method described in Examples described later a score of 7.0 or more is preferred, and a score of 8.0 or more is more preferred.
- the lubricating oil composition according to the present embodiment is excellent in effect of reducing a friction coefficient, and is also excellent in maintainability of the high-temperature detergency and dispersibility.
- the lubricating oil composition according to the present embodiment is preferably used in an internal combustion engine, and more preferably used in an internal combustion engine of a four-wheeled vehicle or a motorcycle.
- the lubricating oil composition according to the present embodiment is preferably used as an engine oil, and more preferably used as a gasoline engine oil.
- the lubricating oil composition according to the present embodiment is suitable for use as a lubricating oil composition for an internal combustion engine (an engine oil for an internal combustion engine) used in automobiles and the like, and can also be applied to other uses.
- a method for producing a lubricating oil composition including: a step of mixing a base oil (A), a molybdenum-based friction modifier (B), a metal-based detergent (C), and a dispersant (D), in which the dispersant (D) contains a non-boron-modified polyisobutenyl succinic bisimide (D1), in an IR spectrum of the non-boron-modified polyisobutenyl succinic bisimide (D1) as determined by an FT-IR method, a ratio [Abs (1705 cm 1 )/Abs (1390 cm ⁇ 1 )] of a peak intensity Abs (1705 cm ⁇ 1 ) at 1705 cm ⁇ 1 to a peak intensity Abs (1390 cm ⁇ 1 ) at 1390 cm ⁇ 1 is 7.5 or less, a content of the non-boron-modified polyisobutenyl succinic bisimide (D1) is 50 mass % or more based on
- the method for mixing the above components is not particularly limited, and examples thereof include a step of adding the molybdenum-based friction modifier (B), the metal-based detergent (C), and the dispersant (D) to the base oil (A) and then mixing them.
- the production method may further include a step of adding the other components described above.
- Each component can be added in a form of a solution (dispersion) in which a diluent oil or the like is added. After each component is added, it is preferable to include a step of uniformly dispersing the components by stirring according to a known method.
- a kinematic viscosity at 40° C., a kinematic viscosity at 100° C., and a viscosity index of the lubricating oil composition were measured or calculated in accordance with JIS K 2283:2000.
- An IR spectrum was determined by a liquid film method in accordance with JIS K0117. Using a KBr fixed cell having an optical path length of 0.1 mm, the evaluation was performed using a sample prepared by diluting the dispersant (D) in the base oil (A) such that a content of the dispersant (D) in the sample was 200 ppm in terms of a nitrogen atom.
- a sulfated ash content in the lubricating oil composition was measured in accordance with JIS K 2272:1998.
- a base number was measured by a perchloric acid method in accordance with JIS K 2501:2003.
- a content of a nitrogen atom was measured in accordance with JIS K 2609:1998.
- the contents in Tables 1 to 4 are contents in terms of a resin component.
- R 1 , R 2 , R 3 , and R 4 are each independently selected from an isooctyl group (number of carbon atoms: 8, short-chain substituent group) and an isotridecyl group (number of carbon atoms: 13, long-chain substituent group), and a molar ratio of the isooctyl group to the isotridecyl group in all molecules of molybdenum dialkyldithiocarbamate is 50:50.
- X 1 and X 2 are sulfur atoms
- X 3 and X 4 are oxygen atoms.
- the content of the molybdenum atom in the lubricating oil composition is a value reflecting the content of the molybdenum atom derived from the molybdenum-based friction modifier (B).
- the contents of the calcium atom and the magnesium atom in the lubricating oil composition are values reflecting the contents of the calcium atom and the magnesium atom derived from the metal-based detergent (C).
- the content of the boron atom in the lubricating oil composition is a value reflecting the content of the boron atom derived from the boron-modified succinimide (D3).
- the content of the phosphorus atom in the lubricating oil composition is a value reflecting the content of the phosphorus atom derived from ZnDTP which is another additive.
- the content of the nitrogen atom in the lubricating oil composition is a value reflecting the content of the nitrogen atom derived from the non-boron-modified polyisobutenyl succinic bisimide (D1), the non-boron-modified succinimide (D2), and the boron-modified succinimide (D3).
- the “content ratio of the non-boron-modified polyisobutenyl succinic bisimide (D1) based on the total amount (100 mass %) of the dispersant (D)” was calculated by dividing the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) having a ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of 7.5 or less, that is, the content of the non-boron-modified polyisobutenyl succinic bisimide (D1-1) or (D1-2) by the total content of the dispersant (D).
- the “ratio of the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) to the content of the molybdenum atom derived from the molybdenum-based friction modifier (B)” was calculated by dividing the content of the non-boron-modified polyisobutenyl succinic bisimide (D1) having a ratio [Abs (1705 cm ⁇ 1 )/Abs (1390 cm ⁇ 1 )] of 7.5 or less, that is, the content of the non-boron-modified polyisobutenyl succinic bisimide (D1-1) or (D1-2) by the content of the molybdenum atom derived from the molybdenum-based friction modifier (B).
- the friction coefficient when the prepared lubricating oil composition was used was measured using an SRV tester (manufactured by Optimol) under the following conditions.
- the friction coefficient was measured every 1 second in the final 1 minute in the test at 140° C., and the average value of the friction coefficient in the final 1 minute was calculated.
- the rate of change from the friction coefficient in Comparative Example 3 was calculated by dividing a “difference between the friction coefficient of each lubricating oil composition and the friction coefficient of the lubricating oil composition in Comparative Example 3” by the “friction coefficient of the lubricating oil composition in Comparative Example 3”.
- a hot tube test in accordance with JPI-5S-55-99 was performed at a temperature of 280° C.
- scores of 0 to 10 in the hot tube test when the score was 7.0 or more, the lubricating oil composition was evaluated as a lubricating oil composition in which high-temperature detergency and dispersibility was maintained for a long period of time.
- Example 1 2 3 4 5 Base oil (A) mass % 89.55 91.55 89.85 91.55 91.85 Friction Molybdenum-based friction modifier (B) mass % 0.70 0.70 0.70 0.70 0.70 modifier Diethanolamine mass % 0.30 0.30 — — — Metal-based Calcium-based detergent (C1-1) mass % 1.60 1.60 1.60 1.60 1.60 detergent Calcium-based detergent (C1-2) mass % — — — — — — (C) Magnesium-based detergent (C2-1) mass % 0.40 0.40 0.40 0.40 0.40 0.40 0.40 0.40 Magnesium-based detergent (C2-2) mass % — — — — — Dispersant Non-boron-modified polyisobutenyl mass % — — — — — (D) succinic bisimide (D1-1) Non-boron-modified polyisobutenyl mass % — — — —
- the lubricating oil compositions in Examples 1 to 15 that satisfy all of the compositions of the present invention have a low friction coefficient and a higher rate of decrease in friction coefficient than the friction coefficient in Comparative Example 3, indicating that the effect of reducing a friction coefficient is excellent.
- the lubricating oil compositions in Comparative Examples 1 to 5 have a higher friction coefficient than that of the lubricating oil compositions in Examples 1 to 15, and do not exhibit the effect of reducing a friction coefficient.
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| JP2021017603 | 2021-02-05 | ||
| JP2021-017603 | 2021-02-05 | ||
| PCT/JP2022/004403 WO2022168935A1 (ja) | 2021-02-05 | 2022-02-04 | 潤滑油組成物 |
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| US (1) | US20240110121A1 (zh) |
| EP (1) | EP4289919A1 (zh) |
| JP (1) | JP7164764B1 (zh) |
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| JPH10183153A (ja) * | 1996-10-29 | 1998-07-14 | Idemitsu Kosan Co Ltd | ディーゼルエンジン用潤滑油組成物 |
| JP4597223B2 (ja) * | 2008-06-09 | 2010-12-15 | 出光興産株式会社 | 内燃機関用潤滑油組成物 |
| JP7150455B2 (ja) * | 2018-03-30 | 2022-10-11 | 出光興産株式会社 | 潤滑油用分散剤及びその製造方法、並びに潤滑油組成物 |
| EP3736318B1 (en) * | 2019-05-09 | 2022-03-09 | Infineum International Limited | Transmission fluid composition for improved wear protection |
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| JPWO2022168935A1 (zh) | 2022-08-11 |
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