WO2023234294A1 - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
- Publication number
- WO2023234294A1 WO2023234294A1 PCT/JP2023/020100 JP2023020100W WO2023234294A1 WO 2023234294 A1 WO2023234294 A1 WO 2023234294A1 JP 2023020100 W JP2023020100 W JP 2023020100W WO 2023234294 A1 WO2023234294 A1 WO 2023234294A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lubricating oil
- oil composition
- mass
- less
- calcium
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 144
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 143
- 239000002199 base oil Substances 0.000 claims abstract description 43
- 238000012360 testing method Methods 0.000 claims abstract description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 68
- 239000011575 calcium Substances 0.000 claims description 65
- 229910052791 calcium Inorganic materials 0.000 claims description 45
- 238000002485 combustion reaction Methods 0.000 claims description 39
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 38
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 38
- 239000000446 fuel Substances 0.000 claims description 37
- 239000001257 hydrogen Substances 0.000 claims description 37
- 229910052739 hydrogen Inorganic materials 0.000 claims description 37
- 239000003599 detergent Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 27
- ZMRQTIAUOLVKOX-UHFFFAOYSA-L calcium;diphenoxide Chemical compound [Ca+2].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 ZMRQTIAUOLVKOX-UHFFFAOYSA-L 0.000 claims description 20
- 230000007935 neutral effect Effects 0.000 claims description 20
- 230000001050 lubricating effect Effects 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 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 33
- 239000003921 oil Substances 0.000 description 30
- 239000002585 base Substances 0.000 description 29
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 26
- 239000003595 mist Substances 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000002184 metal Substances 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 238000004939 coking Methods 0.000 description 17
- 238000004945 emulsification Methods 0.000 description 17
- 239000000654 additive Substances 0.000 description 14
- -1 polyol esters Chemical class 0.000 description 11
- 239000002518 antifoaming agent Substances 0.000 description 10
- 229920001577 copolymer Polymers 0.000 description 10
- 239000003963 antioxidant agent Substances 0.000 description 9
- 125000004432 carbon atom Chemical group C* 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000011109 contamination Methods 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 239000002270 dispersing agent Substances 0.000 description 7
- 239000000839 emulsion Substances 0.000 description 7
- 229920000193 polymethacrylate Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 150000002430 hydrocarbons Chemical group 0.000 description 6
- 239000006078 metal deactivator Substances 0.000 description 6
- 239000003607 modifier Substances 0.000 description 6
- 230000008719 thickening Effects 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000994 depressogenic effect Effects 0.000 description 5
- 239000003085 diluting agent Substances 0.000 description 5
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 4
- 229960001860 salicylate Drugs 0.000 description 4
- 239000004711 α-olefin Substances 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 239000005077 polysulfide Substances 0.000 description 3
- 229920001021 polysulfide Polymers 0.000 description 3
- 150000008117 polysulfides Polymers 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- 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
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 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 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000007655 standard test method Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 2
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 description 2
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 1
- IHWDIGHWDQPQMQ-UHFFFAOYSA-N 1-octadecylsulfanyloctadecane Chemical compound CCCCCCCCCCCCCCCCCCSCCCCCCCCCCCCCCCCCC IHWDIGHWDQPQMQ-UHFFFAOYSA-N 0.000 description 1
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 1
- DKCPKDPYUFEZCP-UHFFFAOYSA-N 2,6-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=CC(C(C)(C)C)=C1O DKCPKDPYUFEZCP-UHFFFAOYSA-N 0.000 description 1
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 1
- NBPOOCGXISZKSX-UHFFFAOYSA-N 6-methylheptyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)CCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NBPOOCGXISZKSX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical class 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical class C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-OWOJBTEDSA-L fumarate(2-) Chemical compound [O-]C(=O)\C=C\C([O-])=O VZCYOOQTPOCHFL-OWOJBTEDSA-L 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical class [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- YCWSUKQGVSGXJO-NTUHNPAUSA-N nifuroxazide Chemical group C1=CC(O)=CC=C1C(=O)N\N=C\C1=CC=C([N+]([O-])=O)O1 YCWSUKQGVSGXJO-NTUHNPAUSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920013639 polyalphaolefin Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920013636 polyphenyl ether polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003873 salicylate salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 229940042055 systemic antimycotics triazole derivative Drugs 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- 150000003580 thiophosphoric acid esters Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/26—Carboxylic acids; Salts thereof
- C10M129/48—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring
- C10M129/54—Carboxylic acids; Salts thereof having carboxyl groups bound to a carbon atom of a six-membered aromatic ring containing hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
-
- 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
- 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
- C10M171/02—Specified values of viscosity or viscosity index
-
- 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
- C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
- C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
- C10M129/04—Hydroxy compounds
- C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/08—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium containing a sulfur-to-oxygen bond
- C10M135/10—Sulfonic acids or derivatives thereof
-
- 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
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
- C10M159/22—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing phenol radicals
Definitions
- the present invention relates to a lubricating oil composition and a method of lubricating an internal combustion engine.
- Patent Document 1 for the purpose of providing a lubricating oil composition for internal combustion engines that can suppress the occurrence of coking and copper elution while suppressing a decrease in base number, a lubricating oil base oil and a predetermined amount in terms of boron are disclosed.
- a lubricating oil composition for an internal combustion engine comprising a boron-containing alkenylsuccinimide and/or a boron-containing alkylsuccinimide, and a poly(meth)acrylate having a weight average molecular weight and an average carbon number of an alkyl group within a predetermined range. is disclosed.
- a lubricating oil composition that uses a base oil with a NOACK value of a predetermined value and has a CCS viscosity at -25°C and an HTHS viscosity at 150°C adjusted to a predetermined range.
- CCS viscosity at -25°C is 7000 mPa ⁇ s or less
- the HTHS viscosity at 150°C is 2.9 mPa ⁇ s or more
- Lubricating oil composition [2] A method for lubricating an internal combustion engine, in which the lubricating oil composition according to [1] above is applied to lubricate an internal combustion engine.
- the ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40
- the ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ⁇ 0.02
- CCS viscosity at -25°C is 7000 mPa ⁇ s or less
- the HTHS viscosity at 150°C is 2.9 mPa ⁇ s or more
- a lubricating oil composition used in internal combustion engines that run on hydrogen. [4] A method for lubricating an internal combustion engine, in which the lubricating oil composition according to [3] above is applied to lubricating an internal combustion engine that operates using hydrogen as fuel.
- the lubricating oil composition of a preferred embodiment of the present invention has various properties and can be suitably used for lubricating internal combustion engines.
- the lubricating oil composition of a preferred embodiment of the present invention has a high effect of suppressing the occurrence of coking in a high-temperature environment.
- the lubricating oil composition of another preferred embodiment of the present invention has properties such as emulsification resistance that can be suitably used in internal combustion engines that operate using hydrogen as fuel.
- the upper and lower limits can be arbitrarily combined.
- a numerical range is described as "preferably 30 to 100, more preferably 40 to 80"
- the range of "30 to 80” and the range of "40 to 100” are also described in this specification. Included in the specified numerical range.
- the numerical range is described as "preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less", “30 to 80”
- the range and the range "40 to 100" are also included in the numerical ranges described herein.
- the numerical range from the lower limit value to the upper limit value can be defined by appropriately selecting from each option and combining them arbitrarily.
- the description "60 to 100” means a range of "60 or more (60 or more than 60) and 100 or less (100 or less than 100)". do.
- a plurality of the various requirements described as preferred embodiments described herein can be combined.
- the lubricating oil composition of one embodiment of the present invention contains a base oil (A) having a NOACK value of 6% by mass or less, and satisfies the following requirements (I) and (II).
- a lubricating oil composition according to one embodiment of the present invention contains a base oil (A) with a NOACK value of 6% by mass or less, and satisfies the above requirements (I) and (II).
- a lubricating oil composition having a CCS viscosity of more than 7000 mPa ⁇ s at ⁇ 25° C. tends to have insufficient engine startability in a low-temperature environment.
- the CCS viscosity at -25°C means a value measured at -25°C in accordance with ASTM D5293.
- a lubricating oil composition that satisfies requirement (II) can easily maintain an oil film even at high temperatures and has good wear resistance.
- Lubricating oil compositions having an HTHS viscosity of less than 2.9 mPa ⁇ s at 150° C. tend to have poor wear resistance.
- the HTHS viscosity at 150°C of the lubricating oil composition of one embodiment of the present invention is preferably 3.0 mPa. ⁇ s or more, more preferably 3.2 mPa ⁇ s or more.
- HTHS viscosity at 150°C means a value measured at 150°C in accordance with ASTM D4683.
- a lubricating oil composition suitable for lubricating hydrogen fuel engines is required.
- Hydrogen fuel engines generate water because they use hydrogen as fuel. This water contamination may cause the lubricating oil composition to become emulsified.
- Hydrogen fuel engines need to discharge the generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment. Therefore, there is a need for a lubricating oil composition that has properties suitable for internal combustion engines that operate using hydrogen as fuel, such as emulsion resistance.
- the lubricating oil composition of one aspect of the present invention further contains at least calcium salicylate (B1), and optionally a neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium.
- B1 calcium salicylate
- B2 neutral calcium sulfonate
- the lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver (C). Furthermore, the lubricating oil composition of one embodiment of the present invention may further contain other lubricating oil additives other than the above-mentioned components (B) and (C) to the extent that the effects of the present invention are not impaired. .
- the base oil (A) used in one aspect of the present invention includes one or more selected from mineral oils and synthetic oils.
- Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oil, intermediate crude oil, and naphthenic crude oil; Extracted oil; Refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining; It will be done.
- Examples of synthetic oils include poly ⁇ -olefins such as ⁇ -olefin homopolymers and ⁇ -olefin copolymers (for example, ⁇ -olefin copolymers having 8 to 14 carbon atoms such as ethylene- ⁇ -olefin copolymers).
- -Olefins Isoparaffins
- Polyalkylene glycols Ester oils such as polyol esters, dibasic acid esters, and phosphoric acid esters
- Ether oils such as polyphenyl ethers; Alkylbenzenes; Alkylnaphthalenes; Manufactured from natural gas by the Fischer-Tropsch method, etc.
- Examples include synthetic oil (GTL) obtained by isomerizing wax (GTL wax).
- the NOACK value of the base oil (A) used in one aspect of the present invention is 6% by mass or less.
- the NOACK value of the base oil (A) used in one aspect of the present invention is 6% by mass or less.
- the NOACK value of the base oil (A) used in one embodiment of the present invention is 5% by mass or less, 5% by mass or less, and 5% by mass or less. It may be less than 4% by mass, 4% by mass or less, 3% by mass or less, or less than 3% by mass.
- the NOACK value of the base oil (A) can be adjusted by, for example, removing light fractions by distillation. Further, in this specification, the NOACK value means a value measured at 250° C. for 1 hour in accordance with ASTM D5800.
- the kinematic viscosity at 40°C of the base oil (A) used in one aspect of the present invention is preferably 20 mm 2 /s or more, more preferably 25 mm 2 /s or more, more preferably 30 mm 2 /s or more, and even more preferably 32 mm. 2 /s or more, more preferably 34 mm 2 /s or more, particularly preferably 35 mm 2 /s or more, and preferably 120 mm 2 / s or less, more preferably 100 mm 2 /s or less, even more preferably 80 mm 2 /s or less, more preferably 60 mm 2 /s or less.
- the kinematic viscosity at 40°C of the base oil (A) used in one embodiment of the present invention is 32 to 120 mm 2 /s, 34 to 100 mm 2 /s, 35 to 80 mm 2 /s, or 35 to 60 mm 2 /s.
- the speed may be 20 mm 2 /s to 120 mm 2 /s, 25 to 100 mm 2 /s, 30 to 80 mm 2 /s, or 35 to 60 mm 2 /s.
- kinematic viscosity means a value measured in accordance with ASTM D445.
- the viscosity index of the base oil (A) used in one aspect of the present invention is preferably 80 or more, more preferably 100 or more, even more preferably 110 or more, even more preferably 120 or more.
- the viscosity index means a value calculated in accordance with ASTM D2270.
- the base oil (A) used in one embodiment of the present invention may be a single type of base oil or a mixed oil that is a combination of two or more types of base oils.
- the mixture may be a combination of base oils with a NOACK value of 6% by mass or less, or a combination of a base oil with a NOACK value of 6% by mass or less and a base oil with a NOACK value of more than 6% by mass.
- the kinematic viscosity and viscosity index of the mixed oil are within the above ranges.
- the content of the base oil (A) is 60% by mass or more, 65% by mass or more, 70% by mass, based on the total amount (100% by mass) of the lubricating oil composition. or more, 75% by mass or more, or 80% by mass or more, and 99.9% by mass or less, 99.5% by mass or less, 99.0% by mass or less, 97.0% by mass or less, 95.0% by mass % or less, 92.0% by mass or less, or 90.0% by mass or less.
- the lubricating oil composition of one aspect of the present invention includes at least calcium salicylate (B1), and optionally one type selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). It may contain a calcium-based detergent (B) that may include the above.
- a lubricating oil composition with improved emulsification resistance can be obtained.
- Internal combustion engines that operate using hydrogen as fuel hereinafter also referred to as "hydrogen fuel engines" generate water because they use hydrogen as fuel. This water contamination may cause the lubricating oil composition to become emulsified.
- Hydrogen fuel engines need to discharge the generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment.
- the lubricating oil composition of one embodiment of the present invention improves emulsification resistance by containing calcium salicylate (B1), and therefore has a high effect of suppressing thickening due to water contamination. It can be suitably used in hydrogen fuel engines.
- the lubricating oil composition of one embodiment of the present invention includes, as the calcium-based detergent (B), calcium salicylate (B1), a neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less, and/or calcium It may also contain phenate (B3).
- the content (b) of the calcium-based detergent (B) in terms of calcium atoms is, for example, 1500% based on the total amount (100% by mass) of the lubricating oil composition.
- the content may be greater than or equal to 2,000 mass ppm, or may be greater than or equal to 2,300 mass ppm, or may be less than or equal to 2,800 mass ppm.
- the content of calcium atoms means a value measured in accordance with ASTM D5185.
- Examples of the calcium salicylate (B1) used in one embodiment of the present invention include a compound represented by the following general formula (b-1).
- each R is independently a hydrocarbon group having 1 to 18 carbon atoms.
- Hydrocarbon groups that can be selected as R include alkyl groups having 1 to 18 carbon atoms.
- the calcium salicylate (B1) used in one aspect of the present invention may be an overbased calcium salicylate (B11) with a base number of 100 mgKOH/g or more, or a neutral calcium salicylate (B12) with a base number of less than 100 mgKOH/g. ), or these may be used in combination.
- a base value means the value measured by the perchloric acid method based on ASTM D2896.
- the base number of the overbased calcium salicylate (B11) used in one aspect of the present invention may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, and 400 mgKOH/g or less. , or 350 mgKOH/g or less.
- the base number of the neutral calcium salicylate (B12) used in one aspect of the present invention may be 0 mgKOH/g or more, 10 mgKOH/g or more, 20 mgKOH/g or more, 30 mgKOH/g or more, or 40 mgKOH/g or more, and It may be 70 mgKOH/g or less.
- the ratio of the content (b1) of calcium salicylate (B1) in terms of calcium atoms to the content (b) in terms of calcium atoms of the calcium-based detergent (B) [ (b1)/(b)] may be 0.60 or more, 0.65 or more, or 0.70 or more, or 1.00 or less, 0.95 or less, 0.90 or less, or 0.85 The following may be used.
- the content of overbased calcium salicylate (B11) is 0.1% by mass or more and 0.5% by mass based on the total amount (100% by mass) of the lubricating oil composition. mass% or more, 1.0 mass% or more, 1.5 mass% or more, 1.7 mass% or more, and 10.0 mass% or less, 7.0 mass% or less, 5.0 mass% or less, It is 4.0% by mass or less.
- the content of neutral calcium salicylate (B12) is 1.0% by mass or more and 3.0% by mass based on the total amount (100% by mass) of the lubricating oil composition. 5.0% by mass or more, 7.0% by mass or more, 9.0% by mass or more, and 20.0% by mass or less, 17.0% by mass or less, 15.0% by mass or less, 12. It is 0% by mass or less.
- the lubricating oil composition of one embodiment of the present invention may contain a neutral calcium sulfonate (B2) having a base number of 70 mgKOH/g or less as the calcium-based detergent (B).
- the ratio of the content (b2) of the neutral calcium sulfonate (B2) in terms of calcium atoms to the content (b) of the calcium-based detergent (B) in terms of calcium atoms [(b2)/(b)] is preferably 0 to 0.40.
- a lubricating oil composition in which the ratio [(b2)/(b)] is more than 0.40 exhibits a decrease in emulsification resistance, and there is a concern that the composition may thicken due to water contamination.
- the ratio [(b2)/(b)] is 0.40 or less, 0.35 or less, or 0.30 or less, or 0 or more, 0.05 or more, or 0.10 or more, preferably 0.15 or more, more preferably 0.15 or more, from the viewpoint of particularly improving emulsification resistance. It is 0.20 or more.
- the base number of the neutral calcium sulfonate (B2) used in one aspect of the present invention is 70 mgKOH/g or less, and is 0 mgKOH/g or more, 10 mgKOH/g or more, 20 mgKOH/g or more, 30 mgKOH/g or more, or 40 mgKOH/g or more. /g or more.
- Examples of the neutral calcium sulfonate used in one embodiment of the present invention include a compound represented by the following general formula (b-2) and having a base value of 70 mgKOH/g or less.
- each R is independently a hydrocarbon group having 8 to 30 carbon atoms.
- Hydrocarbon groups that can be selected as R include, for example, alkyl groups having 8 to 30 carbon atoms.
- the content of neutral calcium sulfonate (B2) is determined based on the total amount of the lubricating oil composition (100 mass %), 8.0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, 3.5% by mass or less, and 0% by mass or more, 0 It may be .5% by mass or more, 1.0% by mass or more, or 1.5% by mass or more.
- the lubricating oil composition of one embodiment of the present invention may contain calcium phenate (B3) as the calcium-based detergent (B).
- the ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is , preferably 0 to 0.02.
- a lubricating oil composition in which the ratio [(b3)/(b)] is more than 0.02 exhibits a decrease in emulsification resistance, and there is a concern that the composition may thicken due to water contamination.
- the calcium phenate (B3) used in one aspect of the present invention includes an overbased calcium phenate (B31) having a base value of 100 mgKOH/g or more.
- the base number of the overbased calcium phenate (B31) used in one aspect of the present invention may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, or 400 mgKOH/g It may be less than or equal to 350 mgKOH/g.
- Examples of the calcium phenate (B3) used in one embodiment of the present invention include a compound represented by the following general formula (b-3).
- each R is independently a hydrocarbon group having 8 to 30 carbon atoms, and y is an integer of 0 or more.
- Hydrocarbon groups that can be selected as R include, for example, alkyl groups having 8 to 30 carbon atoms.
- the lubricating oil composition of one embodiment of the present invention may contain an overbased calcium sulfonate (B4) having a base value of 120 mgKOH/g or more, as long as the effects of the present invention are not impaired.
- the base number of the overbased calcium sulfonate (B4) may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, and may also be 500 mgKOH/g or less, 400 mgKOH/g or less, or It may be 350 mgKOH/g or less.
- the content of such other metal-based compounds is as small as possible.
- the amount of overbase relative to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is The ratio [(b4)/(b)] of the content (b4) of the calcium sulfonate (B4) in terms of calcium atoms is preferably less than 0.10.
- the lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver (C).
- a viscosity index improver By containing the viscosity index improver, a lubricating oil composition with good fuel efficiency can be obtained.
- the viscosity index improver (C) used in one embodiment of the present invention may be used alone or in combination of two or more.
- Examples of the viscosity index improver (C) used in one embodiment of the present invention include non-dispersed polymethacrylates, dispersed polymethacrylates, olefin copolymers (e.g., ethylene-propylene copolymers, etc.), and dispersed olefins.
- examples include polymers such as styrene-based copolymers, styrene-based copolymers (eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.).
- the viscosity index improver (C) used in one embodiment of the present invention may be a comb-shaped polymer having a structure in which the main chain has many trifurcated branch points from which high-molecular-weight side chains emerge, It may be a star-shaped polymer having a structure in which three or more chain polymers each having one atom are bonded to each other.
- the content of the viscosity index improver (C) in terms of resin content is set in the lubricating oil composition. Based on the total amount (100% by mass) of the product, preferably 0.40% by mass or less, more preferably 0.35% by mass or less, even more preferably 0.30% by mass or less, and 0.01% by mass or more. , 0.02% by mass or more, 0.03% by mass or more, 0.04% by mass or more, or 0.05% by mass or more.
- the viscosity index improver (C) used in one embodiment of the present invention, the pour point depressant, and the antifoaming agent described below are usually made from mineral oil or synthetic oil, taking into consideration handling properties and solubility with the base oil (A). It is often commercially available in the form of a solution dissolved in a diluent oil such as oil.
- the above content of the viscosity index improver (C) means the content in terms of resin content (solid content) excluding diluent oil.
- the lubricating oil composition of one embodiment of the present invention may further contain lubricating oil additives other than components (B) to (C), as necessary, as long as the effects of the present invention are not impaired. good.
- lubricating oil additives include metal detergents other than component (B), pour point depressants, antioxidants, friction modifiers, antiwear agents, metal deactivators, and ashless dispersants. , metal deactivators, antifoaming agents, and the like. These lubricating oil additives may be used alone or in combination of two or more.
- Metal cleaning agent The lubricating oil composition of one embodiment of the present invention may or may not further contain a metal detergent other than component (B).
- Metal-based detergents may be used alone or in combination of two or more.
- Metal-based detergents used in one embodiment of the present invention include metal salts such as metal sulfonates, metal salicylates, and metal phenates. Further, examples of the metal atoms constituting the metal salt include metal atoms selected from alkali metals and alkaline earth metals (excluding Ca), and more specifically, sodium or magnesium. Note that the metal-based detergent used in one embodiment of the present invention may be a neutral metal-based detergent or an overbased metal-based detergent.
- the content of metal-based detergents other than component (B) is 100% of the total amount of component (B) contained in the lubricating oil composition. Based on parts by mass, less than 50 parts by mass, less than 20 parts by mass, less than 10 parts by mass, less than 5.0 parts by mass, less than 2.0 parts by mass, less than 1.0 parts by mass, less than 0.10 parts by mass, 0 It may be less than .01 part by mass or less than 0.001 part by mass.
- the lubricating oil composition of one aspect of the present invention may further contain a pour point depressant.
- the pour point depressants may be used alone or in combination of two or more.
- Pour point depressants used in one aspect of the present invention include, for example, polymethacrylates, alkylated aromatic compounds, copolymers of fumarate and vinyl acetate, copolymers of ethylene and vinyl acetate, and have weight average molecular weight Polymethacrylates having a molecular weight of 40,000 to 200,000 are preferred.
- the lubricating oil composition of one embodiment of the present invention may further contain an antioxidant.
- the antioxidants may be used alone or in combination of two or more.
- examples of the antioxidant used in one embodiment of the present invention include amine antioxidants such as alkylated diphenylamine, phenylnaphthylamine, and alkylated phenylnaphthylamine; 2,6-di-t-butylphenol, and 4,4'-methylenebis (2,6-di-t-butylphenol), isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, n-octadecyl-3-(3,5-di-t-butyl-4 Examples include phenolic antioxidants such as -hydroxyphenyl)propionate; sulfur-based antioxidants such as phenothiazine, dioctadecyl sulfide, dilauryl-3,3'-thio
- the lubricating oil composition of one embodiment of the present invention may further contain a friction modifier or an antiwear agent.
- the friction modifier or anti-wear agent may be used alone or in combination of two or more.
- Examples of friction modifiers and antiwear agents used in one embodiment of the present invention include sulfur-based compounds such as sulfurized olefins, dialkyl polysulfides, diarylalkyl polysulfides, and diaryl polysulfides; Phosphorous compounds such as acid esters, thiophosphate esters, phosphite esters, alkyl hydrogen phosphites, phosphate ester amine salts, phosphite ester amine salts; molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), molybdenum Organic molybdenum compounds such as amine salts of acids; organic zinc compounds such as zinc dithiophosphate (ZnDTP) and zinc di
- the lubricating oil composition of one embodiment of the present invention may further contain a metal deactivator.
- the metal deactivators may be used alone or in combination of two or more. Examples of the metal deactivator used in one embodiment of the present invention include benzotriazole, triazole derivatives, benzotriazole derivatives, thiadiazole derivatives, and the like.
- the lubricating oil composition of one embodiment of the present invention may further contain an ashless dispersant from the viewpoint of improving dispersibility.
- the ashless dispersants may be used alone or in combination of two or more.
- the ashless dispersant used in one aspect of the present invention is preferably an alkenylsuccinimide, such as alkenylsuccinimide represented by the following general formula (f-1), or alkenylsuccinimide represented by the following general formula (f-2). Examples include the alkenylsuccinic acid monoimides shown below.
- R f1 , R f2 and R f3 are each independently an alkenyl group having a number average molecular weight (Mn) of 900 to 2,500.
- Examples of the alkenyl group that can be selected as R f1 , R f2 and R f3 include a polybutenyl group, a polyisobutenyl group, and the like.
- a f1 , A f2 and A f3 are each independently an alkylene group having 2 to 5 carbon atoms.
- x1 is an integer from 2 to 6.
- x2 is an integer from 2 to 6.
- the compound represented by the general formula (f-1) or (f-2) is one or more selected from boron compounds, alcohols, aldehydes, ketones, alkylphenols, cyclic carbonates, epoxy compounds, organic acids, etc. It may also be a modified alkenylsuccinimide reacted with.
- the lubricating oil composition of one embodiment of the present invention may further contain an antifoaming agent.
- Antifoaming agents may be used alone or in combination of two or more. Examples of the antifoaming agent used in one embodiment of the present invention include alkyl silicone antifoaming agents, fluorosilicone antifoaming agents, fluoroalkyl ether antifoaming agents, and the like.
- the kinematic viscosity at 40°C of the lubricating oil composition of one aspect of the present invention is preferably 10 to 150 mm 2 /s, more preferably 20 to 120 mm 2 /s, more preferably 30 to 110 mm 2 /s, even more preferably
- the speed is 40 to 100 mm 2 /s, more preferably 50 to 90 mm 2 /s, particularly preferably 55 to 85 mm 2 /s.
- the kinematic viscosity at 100° C. of the lubricating oil composition of one embodiment of the present invention is preferably 9.5 mm 2 /s or more, and the upper limit is not particularly limited, but for example, less than 16.3 mm 2 /s. There may be.
- the viscosity index of the lubricating oil composition of one embodiment of the present invention is preferably 80 or more, more preferably 100 or more, more preferably 110 or more, even more preferably 120 or more, and even more preferably 130 or more.
- the mist formation rate of the lubricating oil composition of one embodiment of the present invention is preferably 0.90% by mass or less, more preferably 0.80% by mass. % or less, more preferably 0.70% by mass or less, even more preferably 0.65% by mass or less, particularly preferably 0.60% by mass or less.
- the lubricating oil composition of one embodiment of the present invention was prepared for 24 hours at an oil temperature of 90°C and a panel temperature of 300°C based on the method described in the Examples in accordance with Fed.TestMethodStd.791-3462.
- the amount of caulking material adhering to the panel is preferably 150 mg or less, more preferably 110 mg or less, even more preferably 100 mg or less, particularly preferably 80 mg or less.
- the base number (perchloric acid method) of the lubricating oil composition of one embodiment of the present invention is 5.0 mgKOH/g or more, 7.0 mgKOH/g or more, 9.0 mgKOH/g or more, or 9.2 mgKOH/g or more. It may also be 15.0 mgKOH/g or less, 12.0 mgKOH/g or less, or 10.0 mgKOH/g or less.
- a copper catalyst was placed in a container containing 75 mL of the sample in accordance with the test method of ASTM D 2619 "Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)".
- the volume ratio of the emulsion layer measured by adding 25 mL of distilled water and performing the operations in the examples described later, is preferably 30 volume % or less, more preferably 28 volume % or less, and even more preferably 26 volume % or less.
- the lubricating oil composition of one embodiment of the present invention has excellent mist resistance in a high-temperature environment and is highly effective in suppressing coking. Therefore, the lubricating oil composition of one embodiment of the present invention can be applied to various devices that can exhibit the above characteristics, and can be suitably used for lubrication between various parts in an internal combustion engine.
- the present invention can be particularly suitably used for lubricating various parts in an internal combustion engine (hydrogen fuel engine) that is equipped with a turbotarger and operates using hydrogen as fuel.
- the lubricating oil composition of one embodiment of the present invention has excellent mist resistance in high-temperature environments, so even when used in a hydrogen fuel engine equipped with a turbotarger, the lubricating oil composition adheres to the turbine wheel. By suppressing the amount of oil composition, it is possible to effectively suppress the occurrence of coking.
- a lubricating oil composition according to another embodiment of the present invention has the above characteristics and further has excellent emulsification resistance. Therefore, the lubricating oil composition can prevent thickening of the lubricating oil composition due to water contamination, and can prevent troubles in the equipment used.
- the lubricating oil composition of this embodiment can be applied to various devices capable of exhibiting the above characteristics, but can be more preferably used for lubrication between parts in an internal combustion engine (hydrogen fuel engine) that operates using hydrogen as fuel. . Since hydrogen-fueled engines use hydrogen as fuel, water is likely to be mixed into the lubricating oil composition. This water contamination may cause the lubricating oil composition to become emulsified.
- Hydrogen fuel engines need to discharge generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment.
- the lubricating oil composition of one embodiment of the present invention exhibits excellent emulsification resistance and can suppress thickening due to water contamination, so it is possible to prevent troubles in hydrogen fuel engines. can.
- the lubricating oil composition of this embodiment can also be suitably used for lubrication of a hydrogen fuel engine equipped with a turbocharger, among hydrogen fuel engines.
- the present invention can also provide the following [I].
- [I] A method for lubricating an internal combustion engine, in which the lubricating oil composition of one embodiment of the present invention described above is applied to lubricating the engine.
- the internal combustion engine described in [I] above include a hydrogen fuel engine, and more specifically a hydrogen fuel engine equipped with a turbotarger. Particularly in a hydrogen fuel engine equipped with a turbine wheel installed on the exhaust passage side of a turbotarger, the occurrence of coking can be effectively suppressed.
- [1] Contains a base oil (A) with a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250 ° C. for 1 hour in accordance with ASTM D5800, CCS viscosity at -25°C is 7000 mPa ⁇ s or less, The HTHS viscosity at 150°C is 2.9 mPa ⁇ s or more, Lubricating oil composition.
- the ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40
- the ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ⁇ 0.02
- CCS viscosity at -25°C is 7000 mPa ⁇ s or less
- the HTHS viscosity at 150°C is 2.9 mPa ⁇ s or more
- [3] Further contains a viscosity index improver (C), The lubricating oil composition according to [1] or [2] above, wherein the content of the viscosity index improver (C) in terms of resin content is 0.40% by mass or less based on the total amount of the lubricating oil composition. thing.
- a method for lubricating an internal combustion engine comprising applying the lubricating oil composition according to any one of [1] to [4] above to lubricate an internal combustion engine.
- Examples 1a to 6a, Comparative Examples 1a to 2a The base oils and various additives used in Examples 1a to 6a and Comparative Examples 1a to 2a below are as follows.
- ⁇ Pour point depressant Polymethacrylate (VISCOPLEX 1-500 (manufactured by EVONIK)) - Additive mixture: JASO DH-2 additive package containing antioxidants, metal detergents, dispersants, antiwear agents, and antifoam agents.
- Table 2 shows the properties of the base oil (mixed base oil) used and the properties of the lubricating oil composition prepared. Further, the following tests were conducted using the prepared lubricating oil composition. These results are also shown in Table 2.
- mist conversion rate was 0.90% by mass or less, it was determined that the lubricating oil composition had good mist resistance.
- Examples 1b to 8b, Reference examples 1b to 8b The components shown in Table 3 or Table 4 were added in the amounts shown in the table and mixed thoroughly to prepare lubricating oil compositions.
- ⁇ “Pour point depressant” Polymethacrylate (VISCOPLEX 1-500 (manufactured by EVONIK)) - Additive mixture: JASO DH-2 additive package containing antioxidants, ashless dispersants, anti-wear agents, and defoamers.
- the total amount of the oil layer, water layer, and emulsion layer after standing was set to 100% by volume, and the volume ratio of each layer was measured. It can be said that the smaller the volume ratio of the emulsion layer, the better the emulsion resistance of the lubricating oil composition. In this example, it was determined that the lubricating oil composition had good emulsification resistance if the volume ratio of the emulsion layer was 30% by volume or less.
- the lubricating oil compositions prepared in Examples 1b to 8b had a low volume ratio of the emulsion layer in the hydrolysis stability test, resulting in excellent emulsification resistance.
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Abstract
The present invention provides a lubricating oil composition which contains a base oil (A) that has an NOACK value of 6% by mass or less as determined by an NOACK test that is carried out at 250°C for one hour in accordance with ASTM D5800, wherein: the CCS viscosity at -25°C is 7,000 mPa∙s or less; and the HTHS viscosity at 150°C is 2.9 mPa∙s or more.
Description
本発明は、潤滑油組成物、及び内燃機関の潤滑方法に関する。
The present invention relates to a lubricating oil composition and a method of lubricating an internal combustion engine.
自動車等に使用される内燃機関には、小型高出力化、省燃費化、排ガス規制対応等、様々な要求がされており、内燃機関に用いる潤滑油組成物に対しても、このような要求に対応し得る開発が行われている。
例えば、特許文献1には、塩基価の低下を抑えつつ、コーキング及び銅溶出の発生を抑制し得る内燃機関用潤滑油組成物の提供を目的として、潤滑油基油と、ホウ素換算で所定量のホウ素含有アルケニルコハク酸イミド及び/又はホウ素含有アルキルコハク酸イミドと、重量平均分子量及びアルキル基の平均炭素数を所定の範囲としたポリ(メタ)アクリレートとを含有する内燃機関用潤滑油組成物が開示されている。 There are various requirements for internal combustion engines used in automobiles, etc., such as miniaturization, high output, fuel efficiency, compliance with exhaust gas regulations, etc., and these requirements also apply to lubricating oil compositions used in internal combustion engines. Developments are underway to accommodate this.
For example, in Patent Document 1, for the purpose of providing a lubricating oil composition for internal combustion engines that can suppress the occurrence of coking and copper elution while suppressing a decrease in base number, a lubricating oil base oil and a predetermined amount in terms of boron are disclosed. A lubricating oil composition for an internal combustion engine, comprising a boron-containing alkenylsuccinimide and/or a boron-containing alkylsuccinimide, and a poly(meth)acrylate having a weight average molecular weight and an average carbon number of an alkyl group within a predetermined range. is disclosed.
例えば、特許文献1には、塩基価の低下を抑えつつ、コーキング及び銅溶出の発生を抑制し得る内燃機関用潤滑油組成物の提供を目的として、潤滑油基油と、ホウ素換算で所定量のホウ素含有アルケニルコハク酸イミド及び/又はホウ素含有アルキルコハク酸イミドと、重量平均分子量及びアルキル基の平均炭素数を所定の範囲としたポリ(メタ)アクリレートとを含有する内燃機関用潤滑油組成物が開示されている。 There are various requirements for internal combustion engines used in automobiles, etc., such as miniaturization, high output, fuel efficiency, compliance with exhaust gas regulations, etc., and these requirements also apply to lubricating oil compositions used in internal combustion engines. Developments are underway to accommodate this.
For example, in Patent Document 1, for the purpose of providing a lubricating oil composition for internal combustion engines that can suppress the occurrence of coking and copper elution while suppressing a decrease in base number, a lubricating oil base oil and a predetermined amount in terms of boron are disclosed. A lubricating oil composition for an internal combustion engine, comprising a boron-containing alkenylsuccinimide and/or a boron-containing alkylsuccinimide, and a poly(meth)acrylate having a weight average molecular weight and an average carbon number of an alkyl group within a predetermined range. is disclosed.
このような状況において、様々な特性を有し、内燃機関に好適に使用し得る、潤滑油組成物が求められている。
Under these circumstances, there is a need for lubricating oil compositions that have various properties and can be suitably used in internal combustion engines.
本発明者らは、鋭意検討を重ねた結果、NOACK値が所定値の基油を用いると共に、-25℃におけるCCS粘度及び150℃におけるHTHS粘度を所定の範囲に調整した潤滑油組成物を一態様として提供する。具体的には、本発明の一態様を以下に開示する。
[1]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)を含有し、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
潤滑油組成物。
[2]上記[1]に記載の潤滑油組成物を、内燃機関の潤滑に適用する、内燃機関の潤滑方法。
[3]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)と、
少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)と、を含有し、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]が、0~0.40であり、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]が、0~0.02であり、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
水素を燃料として作動する内燃機関に用いられる、潤滑油組成物。
[4]上記[3]に記載の潤滑油組成物を、水素を燃料として作動する内燃機関の潤滑に適用する、内燃機関の潤滑方法。 As a result of extensive studies, the present inventors have developed a lubricating oil composition that uses a base oil with a NOACK value of a predetermined value and has a CCS viscosity at -25°C and an HTHS viscosity at 150°C adjusted to a predetermined range. Provided as an aspect. Specifically, one embodiment of the present invention is disclosed below.
[1] Contains a base oil (A) with a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250 ° C. for 1 hour in accordance with ASTM D5800,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
Lubricating oil composition.
[2] A method for lubricating an internal combustion engine, in which the lubricating oil composition according to [1] above is applied to lubricate an internal combustion engine.
[3] A base oil (A) having a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250°C for 1 hour in accordance with ASTM D5800;
Calcium-based detergent (B) that contains at least calcium salicylate (B1) and may optionally contain one or more selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). and,
The ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40,
The ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ~0.02,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
A lubricating oil composition used in internal combustion engines that run on hydrogen.
[4] A method for lubricating an internal combustion engine, in which the lubricating oil composition according to [3] above is applied to lubricating an internal combustion engine that operates using hydrogen as fuel.
[1]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)を含有し、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
潤滑油組成物。
[2]上記[1]に記載の潤滑油組成物を、内燃機関の潤滑に適用する、内燃機関の潤滑方法。
[3]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)と、
少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)と、を含有し、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]が、0~0.40であり、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]が、0~0.02であり、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
水素を燃料として作動する内燃機関に用いられる、潤滑油組成物。
[4]上記[3]に記載の潤滑油組成物を、水素を燃料として作動する内燃機関の潤滑に適用する、内燃機関の潤滑方法。 As a result of extensive studies, the present inventors have developed a lubricating oil composition that uses a base oil with a NOACK value of a predetermined value and has a CCS viscosity at -25°C and an HTHS viscosity at 150°C adjusted to a predetermined range. Provided as an aspect. Specifically, one embodiment of the present invention is disclosed below.
[1] Contains a base oil (A) with a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250 ° C. for 1 hour in accordance with ASTM D5800,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
Lubricating oil composition.
[2] A method for lubricating an internal combustion engine, in which the lubricating oil composition according to [1] above is applied to lubricate an internal combustion engine.
[3] A base oil (A) having a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250°C for 1 hour in accordance with ASTM D5800;
Calcium-based detergent (B) that contains at least calcium salicylate (B1) and may optionally contain one or more selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). and,
The ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40,
The ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ~0.02,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
A lubricating oil composition used in internal combustion engines that run on hydrogen.
[4] A method for lubricating an internal combustion engine, in which the lubricating oil composition according to [3] above is applied to lubricating an internal combustion engine that operates using hydrogen as fuel.
本発明の好適な一態様の潤滑油組成物は、様々な特性を有し、内燃機関の潤滑に好適に使用し得る。例えば、本発明の好適な一態様の潤滑油組成物は、高温環境下でのコーキングの発生の抑制効果が高い。また、本発明の別の好適な一態様の潤滑油組成物は、耐乳化性等の水素を燃料として作動する内燃機関に好適に使用し得る特性を有する。
The lubricating oil composition of a preferred embodiment of the present invention has various properties and can be suitably used for lubricating internal combustion engines. For example, the lubricating oil composition of a preferred embodiment of the present invention has a high effect of suppressing the occurrence of coking in a high-temperature environment. Furthermore, the lubricating oil composition of another preferred embodiment of the present invention has properties such as emulsification resistance that can be suitably used in internal combustion engines that operate using hydrogen as fuel.
本明細書に記載された数値範囲については、上限値及び下限値を任意に組み合わせることができる。例えば、数値範囲として「好ましくは30~100、より好ましくは40~80」と記載されている場合、「30~80」との範囲や「40~100」との範囲も、本明細書に記載された数値範囲に含まれる。
また、例えば、数値範囲として「好ましくは30以上、より好ましくは40以上であり、また、好ましくは100以下、より好ましくは80以下である」と記載されている場合、「30~80」との範囲や「40~100」との範囲も、本明細書に記載された数値範囲に含まれる。つまり、本明細書に記載された上限値及び下限値の規定において、それぞれの選択肢の中から適宜選択して、任意に組み合わせて、下限値~上限値の数値範囲を規定することができる。
さらに、本明細書に記載された数値範囲として、例えば「60~100」との記載は、「60以上(60又は60超)、100以下(100又は100未満)」という範囲であることを意味する。
加えて、本明細書に記載された好ましい態様として記載の各種要件は複数組み合わせることができる。 Regarding the numerical ranges described in this specification, the upper and lower limits can be arbitrarily combined. For example, when a numerical range is described as "preferably 30 to 100, more preferably 40 to 80", the range of "30 to 80" and the range of "40 to 100" are also described in this specification. Included in the specified numerical range.
Also, for example, when the numerical range is described as "preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less", "30 to 80" The range and the range "40 to 100" are also included in the numerical ranges described herein. That is, in defining the upper limit value and lower limit value described in this specification, the numerical range from the lower limit value to the upper limit value can be defined by appropriately selecting from each option and combining them arbitrarily.
Furthermore, as a numerical range described in this specification, for example, the description "60 to 100" means a range of "60 or more (60 or more than 60) and 100 or less (100 or less than 100)". do.
In addition, a plurality of the various requirements described as preferred embodiments described herein can be combined.
また、例えば、数値範囲として「好ましくは30以上、より好ましくは40以上であり、また、好ましくは100以下、より好ましくは80以下である」と記載されている場合、「30~80」との範囲や「40~100」との範囲も、本明細書に記載された数値範囲に含まれる。つまり、本明細書に記載された上限値及び下限値の規定において、それぞれの選択肢の中から適宜選択して、任意に組み合わせて、下限値~上限値の数値範囲を規定することができる。
さらに、本明細書に記載された数値範囲として、例えば「60~100」との記載は、「60以上(60又は60超)、100以下(100又は100未満)」という範囲であることを意味する。
加えて、本明細書に記載された好ましい態様として記載の各種要件は複数組み合わせることができる。 Regarding the numerical ranges described in this specification, the upper and lower limits can be arbitrarily combined. For example, when a numerical range is described as "preferably 30 to 100, more preferably 40 to 80", the range of "30 to 80" and the range of "40 to 100" are also described in this specification. Included in the specified numerical range.
Also, for example, when the numerical range is described as "preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less", "30 to 80" The range and the range "40 to 100" are also included in the numerical ranges described herein. That is, in defining the upper limit value and lower limit value described in this specification, the numerical range from the lower limit value to the upper limit value can be defined by appropriately selecting from each option and combining them arbitrarily.
Furthermore, as a numerical range described in this specification, for example, the description "60 to 100" means a range of "60 or more (60 or more than 60) and 100 or less (100 or less than 100)". do.
In addition, a plurality of the various requirements described as preferred embodiments described herein can be combined.
〔潤滑油組成物の構成〕
本発明の一態様の潤滑油組成物は、NOACK値が6質量%以下の基油(A)を含有し、下記要件(I)及び(II)を満たす。
・要件(I):-25℃におけるCCS粘度が7000mPa・s以下である。
・要件(II):150℃におけるHTHS粘度が2.9mPa・s以上である。 [Composition of lubricating oil composition]
The lubricating oil composition of one embodiment of the present invention contains a base oil (A) having a NOACK value of 6% by mass or less, and satisfies the following requirements (I) and (II).
-Requirement (I): CCS viscosity at -25°C is 7000 mPa·s or less.
- Requirement (II): HTHS viscosity at 150°C is 2.9 mPa·s or more.
本発明の一態様の潤滑油組成物は、NOACK値が6質量%以下の基油(A)を含有し、下記要件(I)及び(II)を満たす。
・要件(I):-25℃におけるCCS粘度が7000mPa・s以下である。
・要件(II):150℃におけるHTHS粘度が2.9mPa・s以上である。 [Composition of lubricating oil composition]
The lubricating oil composition of one embodiment of the present invention contains a base oil (A) having a NOACK value of 6% by mass or less, and satisfies the following requirements (I) and (II).
-Requirement (I): CCS viscosity at -25°C is 7000 mPa·s or less.
- Requirement (II): HTHS viscosity at 150°C is 2.9 mPa·s or more.
近年、高温環境下でのコーキングの発生の抑制効果が高く、内燃機関に好適に使用し得る潤滑油組成物が求められている。
このような課題に対して、本発明の一態様の潤滑油組成物は、NOACK値が6質量%以下の基油(A)を含有し、上記要件(I)及び(II)を満たすように調整することで、高温環境下でのコーキングの発生の抑制効果が高く、内燃機関に好適に使用し得る潤滑油組成物としている。
要件(I)を満たす潤滑油組成物とすることで、低温におけるエンジンの始動性が良好となる。-25℃におけるCCS粘度が7000mPa・s超である潤滑油組成物は、低温環境下でのエンジンの始動性が不十分となる傾向にある。
なお、本明細書において、-25℃におけるCCS粘度は、ASTM D5293に準拠して、-25℃で測定した値を意味する。 In recent years, there has been a demand for lubricating oil compositions that are highly effective in suppressing the occurrence of coking in high-temperature environments and can be suitably used in internal combustion engines.
To address these issues, a lubricating oil composition according to one embodiment of the present invention contains a base oil (A) with a NOACK value of 6% by mass or less, and satisfies the above requirements (I) and (II). By adjusting the lubricating oil composition, the effect of suppressing the occurrence of coking in high-temperature environments is high, and the lubricating oil composition can be suitably used in internal combustion engines.
By using a lubricating oil composition that satisfies requirement (I), engine startability at low temperatures is improved. A lubricating oil composition having a CCS viscosity of more than 7000 mPa·s at −25° C. tends to have insufficient engine startability in a low-temperature environment.
In this specification, the CCS viscosity at -25°C means a value measured at -25°C in accordance with ASTM D5293.
このような課題に対して、本発明の一態様の潤滑油組成物は、NOACK値が6質量%以下の基油(A)を含有し、上記要件(I)及び(II)を満たすように調整することで、高温環境下でのコーキングの発生の抑制効果が高く、内燃機関に好適に使用し得る潤滑油組成物としている。
要件(I)を満たす潤滑油組成物とすることで、低温におけるエンジンの始動性が良好となる。-25℃におけるCCS粘度が7000mPa・s超である潤滑油組成物は、低温環境下でのエンジンの始動性が不十分となる傾向にある。
なお、本明細書において、-25℃におけるCCS粘度は、ASTM D5293に準拠して、-25℃で測定した値を意味する。 In recent years, there has been a demand for lubricating oil compositions that are highly effective in suppressing the occurrence of coking in high-temperature environments and can be suitably used in internal combustion engines.
To address these issues, a lubricating oil composition according to one embodiment of the present invention contains a base oil (A) with a NOACK value of 6% by mass or less, and satisfies the above requirements (I) and (II). By adjusting the lubricating oil composition, the effect of suppressing the occurrence of coking in high-temperature environments is high, and the lubricating oil composition can be suitably used in internal combustion engines.
By using a lubricating oil composition that satisfies requirement (I), engine startability at low temperatures is improved. A lubricating oil composition having a CCS viscosity of more than 7000 mPa·s at −25° C. tends to have insufficient engine startability in a low-temperature environment.
In this specification, the CCS viscosity at -25°C means a value measured at -25°C in accordance with ASTM D5293.
要件(II)を満たす潤滑油組成物とすることで、高温でも油膜を保持し易く、耐摩耗性が良好となる。150℃におけるHTHS粘度が2.9mPa・s未満である潤滑油組成物は、耐摩耗性が劣る傾向にある。
高温環境下での油膜保持性を向上させ、耐摩耗性に優れた潤滑油組成物とする観点から、本発明の一態様の潤滑油組成物の150℃におけるHTHS粘度は、好ましくは3.0mPa・s以上、より好ましくは3.2mPa・s以上である。
本明細書において、150℃におけるHTHS粘度は、ASTM D4683に準拠して、150℃で測定した値を意味する。 A lubricating oil composition that satisfies requirement (II) can easily maintain an oil film even at high temperatures and has good wear resistance. Lubricating oil compositions having an HTHS viscosity of less than 2.9 mPa·s at 150° C. tend to have poor wear resistance.
From the viewpoint of improving oil film retention in a high-temperature environment and providing a lubricating oil composition with excellent wear resistance, the HTHS viscosity at 150°C of the lubricating oil composition of one embodiment of the present invention is preferably 3.0 mPa.・s or more, more preferably 3.2 mPa·s or more.
In this specification, HTHS viscosity at 150°C means a value measured at 150°C in accordance with ASTM D4683.
高温環境下での油膜保持性を向上させ、耐摩耗性に優れた潤滑油組成物とする観点から、本発明の一態様の潤滑油組成物の150℃におけるHTHS粘度は、好ましくは3.0mPa・s以上、より好ましくは3.2mPa・s以上である。
本明細書において、150℃におけるHTHS粘度は、ASTM D4683に準拠して、150℃で測定した値を意味する。 A lubricating oil composition that satisfies requirement (II) can easily maintain an oil film even at high temperatures and has good wear resistance. Lubricating oil compositions having an HTHS viscosity of less than 2.9 mPa·s at 150° C. tend to have poor wear resistance.
From the viewpoint of improving oil film retention in a high-temperature environment and providing a lubricating oil composition with excellent wear resistance, the HTHS viscosity at 150°C of the lubricating oil composition of one embodiment of the present invention is preferably 3.0 mPa.・s or more, more preferably 3.2 mPa·s or more.
In this specification, HTHS viscosity at 150°C means a value measured at 150°C in accordance with ASTM D4683.
また、近年、水素燃料エンジンを搭載した自動車等の開発が行われており、水素燃料エンジンの潤滑に適した潤滑油組成物が求められている。水素燃料エンジンは、水素を燃料とするため水が発生する。この水の混入によって潤滑油組成物が乳化してしまう場合がある。水素燃料エンジンは発生した水を車両外部へ排出する必要があるが、乳化してしまうと排出が困難となる。また、乳化してしまうことにより、潤滑油組成物の増粘を引き起こし、エンジン機器の不良の原因ともなる。そのため、耐乳化性等の水素を燃料として作動する内燃機関に好適な特性を有する、潤滑油組成物が求められている。
このような課題に対して、本発明の一態様の潤滑油組成物は、さらに、少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)を含有することで、耐乳化性等の水素を燃料として作動する内燃機関に好適に使用し得る潤滑油組成物とすることができる。 Furthermore, in recent years, automobiles equipped with hydrogen fuel engines have been developed, and a lubricating oil composition suitable for lubricating hydrogen fuel engines is required. Hydrogen fuel engines generate water because they use hydrogen as fuel. This water contamination may cause the lubricating oil composition to become emulsified. Hydrogen fuel engines need to discharge the generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment. Therefore, there is a need for a lubricating oil composition that has properties suitable for internal combustion engines that operate using hydrogen as fuel, such as emulsion resistance.
To address these issues, the lubricating oil composition of one aspect of the present invention further contains at least calcium salicylate (B1), and optionally a neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium. A lubricating oil composition that can be suitably used in internal combustion engines that operate using hydrogen as fuel, such as emulsification resistance, by containing a calcium-based detergent (B) that may contain one or more selected from phenates (B3). It can be a thing.
このような課題に対して、本発明の一態様の潤滑油組成物は、さらに、少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)を含有することで、耐乳化性等の水素を燃料として作動する内燃機関に好適に使用し得る潤滑油組成物とすることができる。 Furthermore, in recent years, automobiles equipped with hydrogen fuel engines have been developed, and a lubricating oil composition suitable for lubricating hydrogen fuel engines is required. Hydrogen fuel engines generate water because they use hydrogen as fuel. This water contamination may cause the lubricating oil composition to become emulsified. Hydrogen fuel engines need to discharge the generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment. Therefore, there is a need for a lubricating oil composition that has properties suitable for internal combustion engines that operate using hydrogen as fuel, such as emulsion resistance.
To address these issues, the lubricating oil composition of one aspect of the present invention further contains at least calcium salicylate (B1), and optionally a neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium. A lubricating oil composition that can be suitably used in internal combustion engines that operate using hydrogen as fuel, such as emulsification resistance, by containing a calcium-based detergent (B) that may contain one or more selected from phenates (B3). It can be a thing.
本発明の一態様の潤滑油組成物は、さらに、粘度指数向上剤(C)を含有してもよい。
また、本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、さらに、上記成分(B)及び(C)以外の他の潤滑油用添加剤を含有してもよい。 The lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver (C).
Furthermore, the lubricating oil composition of one embodiment of the present invention may further contain other lubricating oil additives other than the above-mentioned components (B) and (C) to the extent that the effects of the present invention are not impaired. .
また、本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、さらに、上記成分(B)及び(C)以外の他の潤滑油用添加剤を含有してもよい。 The lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver (C).
Furthermore, the lubricating oil composition of one embodiment of the present invention may further contain other lubricating oil additives other than the above-mentioned components (B) and (C) to the extent that the effects of the present invention are not impaired. .
以下、本発明の一態様の潤滑油組成物に含まれる各成分の詳細について説明する。
Hereinafter, details of each component contained in the lubricating oil composition of one embodiment of the present invention will be explained.
<成分(A):基油>
本発明の一態様で用いる基油(A)は、鉱油及び合成油から選ばれる1種以上が挙げられる。
鉱油としては、例えば、パラフィン基系原油、中間基系原油、ナフテン基系原油等の原油を常圧蒸留して得られる常圧残油;これらの常圧残油を減圧蒸留して得られる留出油;当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、及び水素化精製等の精製処理を1つ以上施して得られる精製油;等が挙げられる。 <Component (A): Base oil>
The base oil (A) used in one aspect of the present invention includes one or more selected from mineral oils and synthetic oils.
Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oil, intermediate crude oil, and naphthenic crude oil; Extracted oil; Refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining; It will be done.
本発明の一態様で用いる基油(A)は、鉱油及び合成油から選ばれる1種以上が挙げられる。
鉱油としては、例えば、パラフィン基系原油、中間基系原油、ナフテン基系原油等の原油を常圧蒸留して得られる常圧残油;これらの常圧残油を減圧蒸留して得られる留出油;当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、及び水素化精製等の精製処理を1つ以上施して得られる精製油;等が挙げられる。 <Component (A): Base oil>
The base oil (A) used in one aspect of the present invention includes one or more selected from mineral oils and synthetic oils.
Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oil, intermediate crude oil, and naphthenic crude oil; Extracted oil; Refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining; It will be done.
合成油としては、例えば、α-オレフィン単独重合体、α-オレフィン共重合体(例えば、エチレン-α-オレフィン共重合体等の炭素数8~14のα-オレフィン共重合体)等のポリα-オレフィン;イソパラフィン;ポリアルキレングリコール;ポリオールエステル、二塩基酸エステル、リン酸エステル等のエステル系油;ポリフェニルエーテル等のエーテル系油;アルキルベンゼン;アルキルナフタレン;天然ガスからフィッシャー・トロプシュ法等により製造されるワックス(GTLワックス(Gas To Liquids WAX))を異性化することで得られる合成油(GTL)等が挙げられる。
Examples of synthetic oils include polyα-olefins such as α-olefin homopolymers and α-olefin copolymers (for example, α-olefin copolymers having 8 to 14 carbon atoms such as ethylene-α-olefin copolymers). -Olefins; Isoparaffins; Polyalkylene glycols; Ester oils such as polyol esters, dibasic acid esters, and phosphoric acid esters; Ether oils such as polyphenyl ethers; Alkylbenzenes; Alkylnaphthalenes; Manufactured from natural gas by the Fischer-Tropsch method, etc. Examples include synthetic oil (GTL) obtained by isomerizing wax (GTL wax).
本発明の一態様で用いる基油(A)のNOACK値は、6質量%以下である。NOACK値が6質量%以下の基油(A)を用いることで、高温環境下で使用しても、ミスト化し難く、ミスト化した成分に由来したコーキング量を抑制することができる。その結果、高温環境下でのコーキングの発生の抑制効果が高い潤滑油組成物とすることができ、例えば、水素を燃料として作動する内燃機関にも好適に使用し得る。一方で、用いる基油(A)のNOACK値が6質量%超であると、調製される潤滑油組成物は、高温環境下でミスト化し易く、コーキングが発生し易くなる傾向にある。
耐ミスト性をより向上させて、コーキングの発生の抑制効果がより高い潤滑油組成物とする観点から、本発明の一態様で用いる基油(A)のNOACK値は、5質量%以下、5質量%未満、4質量%以下、4質量%未満、3質量%以下、又は3質量%未満としてもよい。 The NOACK value of the base oil (A) used in one aspect of the present invention is 6% by mass or less. By using the base oil (A) with a NOACK value of 6% by mass or less, even when used in a high-temperature environment, it is difficult to form into a mist, and the amount of coking derived from the mist-formed components can be suppressed. As a result, a lubricating oil composition can be obtained that is highly effective in suppressing the occurrence of coking in high-temperature environments, and can be suitably used, for example, in internal combustion engines that operate using hydrogen as fuel. On the other hand, if the NOACK value of the base oil (A) used is more than 6% by mass, the prepared lubricating oil composition tends to become a mist in a high-temperature environment and tends to cause coking.
From the viewpoint of providing a lubricating oil composition that further improves mist resistance and is more effective in suppressing the occurrence of coking, the NOACK value of the base oil (A) used in one embodiment of the present invention is 5% by mass or less, 5% by mass or less, and 5% by mass or less. It may be less than 4% by mass, 4% by mass or less, 3% by mass or less, or less than 3% by mass.
耐ミスト性をより向上させて、コーキングの発生の抑制効果がより高い潤滑油組成物とする観点から、本発明の一態様で用いる基油(A)のNOACK値は、5質量%以下、5質量%未満、4質量%以下、4質量%未満、3質量%以下、又は3質量%未満としてもよい。 The NOACK value of the base oil (A) used in one aspect of the present invention is 6% by mass or less. By using the base oil (A) with a NOACK value of 6% by mass or less, even when used in a high-temperature environment, it is difficult to form into a mist, and the amount of coking derived from the mist-formed components can be suppressed. As a result, a lubricating oil composition can be obtained that is highly effective in suppressing the occurrence of coking in high-temperature environments, and can be suitably used, for example, in internal combustion engines that operate using hydrogen as fuel. On the other hand, if the NOACK value of the base oil (A) used is more than 6% by mass, the prepared lubricating oil composition tends to become a mist in a high-temperature environment and tends to cause coking.
From the viewpoint of providing a lubricating oil composition that further improves mist resistance and is more effective in suppressing the occurrence of coking, the NOACK value of the base oil (A) used in one embodiment of the present invention is 5% by mass or less, 5% by mass or less, and 5% by mass or less. It may be less than 4% by mass, 4% by mass or less, 3% by mass or less, or less than 3% by mass.
なお、基油(A)のNOACK値は、例えば、蒸留によって軽質留分を除去する等により調整することができる。
また、本明細書において、NOACK値は、ASTM D5800に準拠して、250℃、1時間で測定した値を意味する。 Note that the NOACK value of the base oil (A) can be adjusted by, for example, removing light fractions by distillation.
Further, in this specification, the NOACK value means a value measured at 250° C. for 1 hour in accordance with ASTM D5800.
また、本明細書において、NOACK値は、ASTM D5800に準拠して、250℃、1時間で測定した値を意味する。 Note that the NOACK value of the base oil (A) can be adjusted by, for example, removing light fractions by distillation.
Further, in this specification, the NOACK value means a value measured at 250° C. for 1 hour in accordance with ASTM D5800.
本発明の一態様で用いる基油(A)の40℃における動粘度は、好ましくは20mm2/s以上、より好ましくは25mm2/s以上、より好ましくは30mm2/s以上、更に好ましくは32mm2/s以上、より更に好ましくは34mm2/s以上、特に好ましくは35mm2/s以上であり、また、好ましくは120mm2/s以下、より好ましくは100mm2/s以下、更に好ましくは80mm2/s以下、より更に好ましくは60mm2/s以下である。
つまり、本発明の一態様で用いる基油(A)の40℃における動粘度は、32~120mm2/s、34~100mm2/s、35~80mm2/s、又は35~60mm2/sとしてもよく、20mm2/s~120mm2/s、25~100mm2/s、30~80mm2/s、又は35~60mm2/sとしてもよい。
本明細書において、動粘度は、ASTM D445に準拠して測定した値を意味する。 The kinematic viscosity at 40°C of the base oil (A) used in one aspect of the present invention is preferably 20 mm 2 /s or more, more preferably 25 mm 2 /s or more, more preferably 30 mm 2 /s or more, and even more preferably 32 mm. 2 /s or more, more preferably 34 mm 2 /s or more, particularly preferably 35 mm 2 /s or more, and preferably 120 mm 2 / s or less, more preferably 100 mm 2 /s or less, even more preferably 80 mm 2 /s or less, more preferably 60 mm 2 /s or less.
In other words, the kinematic viscosity at 40°C of the base oil (A) used in one embodiment of the present invention is 32 to 120 mm 2 /s, 34 to 100 mm 2 /s, 35 to 80 mm 2 /s, or 35 to 60 mm 2 /s. The speed may be 20 mm 2 /s to 120 mm 2 /s, 25 to 100 mm 2 /s, 30 to 80 mm 2 /s, or 35 to 60 mm 2 /s.
In this specification, kinematic viscosity means a value measured in accordance with ASTM D445.
つまり、本発明の一態様で用いる基油(A)の40℃における動粘度は、32~120mm2/s、34~100mm2/s、35~80mm2/s、又は35~60mm2/sとしてもよく、20mm2/s~120mm2/s、25~100mm2/s、30~80mm2/s、又は35~60mm2/sとしてもよい。
本明細書において、動粘度は、ASTM D445に準拠して測定した値を意味する。 The kinematic viscosity at 40°C of the base oil (A) used in one aspect of the present invention is preferably 20 mm 2 /s or more, more preferably 25 mm 2 /s or more, more preferably 30 mm 2 /s or more, and even more preferably 32 mm. 2 /s or more, more preferably 34 mm 2 /s or more, particularly preferably 35 mm 2 /s or more, and preferably 120 mm 2 / s or less, more preferably 100 mm 2 /s or less, even more preferably 80 mm 2 /s or less, more preferably 60 mm 2 /s or less.
In other words, the kinematic viscosity at 40°C of the base oil (A) used in one embodiment of the present invention is 32 to 120 mm 2 /s, 34 to 100 mm 2 /s, 35 to 80 mm 2 /s, or 35 to 60 mm 2 /s. The speed may be 20 mm 2 /s to 120 mm 2 /s, 25 to 100 mm 2 /s, 30 to 80 mm 2 /s, or 35 to 60 mm 2 /s.
In this specification, kinematic viscosity means a value measured in accordance with ASTM D445.
本発明の一態様で用いる基油(A)の粘度指数は、好ましくは80以上、より好ましくは100以上、更に好ましくは110以上、より更に好ましくは120以上である。
本明細書において、粘度指数は、ASTM D2270に準拠して算出した値を意味する。 The viscosity index of the base oil (A) used in one aspect of the present invention is preferably 80 or more, more preferably 100 or more, even more preferably 110 or more, even more preferably 120 or more.
In this specification, the viscosity index means a value calculated in accordance with ASTM D2270.
本明細書において、粘度指数は、ASTM D2270に準拠して算出した値を意味する。 The viscosity index of the base oil (A) used in one aspect of the present invention is preferably 80 or more, more preferably 100 or more, even more preferably 110 or more, even more preferably 120 or more.
In this specification, the viscosity index means a value calculated in accordance with ASTM D2270.
なお、本発明の一態様で用いる基油(A)は、1種単独の基油でもよく、2種以上の基油を組み合わせた混合油でもよい。混合油を用いる場合、混合油のNOACK値が上記範囲であればよい。そのため、当該混合物は、NOACK値が6質量%以下の基油同士の組み合わせであってもよく、NOACK値が6質量%以下の基油とNOACK値は6質量%超の基油との組み合わせであってもよい。
また、当該混合油の動粘度、粘度指数が上記範囲であることが好ましい。 Note that the base oil (A) used in one embodiment of the present invention may be a single type of base oil or a mixed oil that is a combination of two or more types of base oils. When using mixed oil, it is sufficient if the NOACK value of the mixed oil is within the above range. Therefore, the mixture may be a combination of base oils with a NOACK value of 6% by mass or less, or a combination of a base oil with a NOACK value of 6% by mass or less and a base oil with a NOACK value of more than 6% by mass. There may be.
Further, it is preferable that the kinematic viscosity and viscosity index of the mixed oil are within the above ranges.
また、当該混合油の動粘度、粘度指数が上記範囲であることが好ましい。 Note that the base oil (A) used in one embodiment of the present invention may be a single type of base oil or a mixed oil that is a combination of two or more types of base oils. When using mixed oil, it is sufficient if the NOACK value of the mixed oil is within the above range. Therefore, the mixture may be a combination of base oils with a NOACK value of 6% by mass or less, or a combination of a base oil with a NOACK value of 6% by mass or less and a base oil with a NOACK value of more than 6% by mass. There may be.
Further, it is preferable that the kinematic viscosity and viscosity index of the mixed oil are within the above ranges.
本発明の一態様の潤滑油組成物において、基油(A)の含有量は、当該潤滑油組成物の全量(100質量%)基準で、60質量%以上、65質量%以上、70質量%以上、75質量%以上、又は80質量%以上としてもよく、また、99.9質量%以下、99.5質量%以下、99.0質量%以下、97.0質量%以下、95.0質量%以下、92.0質量%以下、又は90.0質量%以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the content of the base oil (A) is 60% by mass or more, 65% by mass or more, 70% by mass, based on the total amount (100% by mass) of the lubricating oil composition. or more, 75% by mass or more, or 80% by mass or more, and 99.9% by mass or less, 99.5% by mass or less, 99.0% by mass or less, 97.0% by mass or less, 95.0% by mass % or less, 92.0% by mass or less, or 90.0% by mass or less.
<成分(B):カルシウム系清浄剤>
本発明の一態様の潤滑油組成物は、少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)を含有してもよい。
カルシウム系清浄剤(B)として、カルシウムサリシレート(B1)を含有することで、耐乳化性を向上させた潤滑油組成物とすることができる。
水素を燃料として作動する内燃機関(以下、「水素燃料エンジン」ともいう)は、水素を燃料としているために水が発生する。この水の混入によって潤滑油組成物が乳化してしまう場合がある。水素燃料エンジンは発生した水を車両外部へ排出する必要があるが、乳化してしまうと排出が困難となる。また、乳化してしまうことにより、潤滑油組成物の増粘を引き起こし、エンジン機器の不良の原因ともなる。これに対して、本発明の一態様の潤滑油組成物は、カルシウムサリシレート(B1)を含有することで、耐乳化性を向上させているため、水の混入による増粘の抑制効果が高く、水素燃料エンジンに好適に使用し得る。 <Component (B): Calcium-based cleaning agent>
The lubricating oil composition of one aspect of the present invention includes at least calcium salicylate (B1), and optionally one type selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). It may contain a calcium-based detergent (B) that may include the above.
By containing calcium salicylate (B1) as the calcium-based detergent (B), a lubricating oil composition with improved emulsification resistance can be obtained.
Internal combustion engines that operate using hydrogen as fuel (hereinafter also referred to as "hydrogen fuel engines") generate water because they use hydrogen as fuel. This water contamination may cause the lubricating oil composition to become emulsified. Hydrogen fuel engines need to discharge the generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment. In contrast, the lubricating oil composition of one embodiment of the present invention improves emulsification resistance by containing calcium salicylate (B1), and therefore has a high effect of suppressing thickening due to water contamination. It can be suitably used in hydrogen fuel engines.
本発明の一態様の潤滑油組成物は、少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)を含有してもよい。
カルシウム系清浄剤(B)として、カルシウムサリシレート(B1)を含有することで、耐乳化性を向上させた潤滑油組成物とすることができる。
水素を燃料として作動する内燃機関(以下、「水素燃料エンジン」ともいう)は、水素を燃料としているために水が発生する。この水の混入によって潤滑油組成物が乳化してしまう場合がある。水素燃料エンジンは発生した水を車両外部へ排出する必要があるが、乳化してしまうと排出が困難となる。また、乳化してしまうことにより、潤滑油組成物の増粘を引き起こし、エンジン機器の不良の原因ともなる。これに対して、本発明の一態様の潤滑油組成物は、カルシウムサリシレート(B1)を含有することで、耐乳化性を向上させているため、水の混入による増粘の抑制効果が高く、水素燃料エンジンに好適に使用し得る。 <Component (B): Calcium-based cleaning agent>
The lubricating oil composition of one aspect of the present invention includes at least calcium salicylate (B1), and optionally one type selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). It may contain a calcium-based detergent (B) that may include the above.
By containing calcium salicylate (B1) as the calcium-based detergent (B), a lubricating oil composition with improved emulsification resistance can be obtained.
Internal combustion engines that operate using hydrogen as fuel (hereinafter also referred to as "hydrogen fuel engines") generate water because they use hydrogen as fuel. This water contamination may cause the lubricating oil composition to become emulsified. Hydrogen fuel engines need to discharge the generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment. In contrast, the lubricating oil composition of one embodiment of the present invention improves emulsification resistance by containing calcium salicylate (B1), and therefore has a high effect of suppressing thickening due to water contamination. It can be suitably used in hydrogen fuel engines.
また、本発明の一態様の潤滑油組成物は、カルシウム系清浄剤(B)として、カルシウムサリシレート(B1)と共に、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)、及び/又は、カルシウムフェネート(B3)を含有してもよい。
Further, the lubricating oil composition of one embodiment of the present invention includes, as the calcium-based detergent (B), calcium salicylate (B1), a neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less, and/or calcium It may also contain phenate (B3).
本発明の一態様の潤滑油組成物において、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)は、当該潤滑油組成物の全量(100質量%)基準で、例えば、1500質量ppm以上、2000質量ppm以上、又は2300質量ppm以上としてもよく、また、2800質量ppm以下としてもよい。
本明細書において、カルシウム原子の含有量は、ASTM D5185に準拠して測定された値を意味する。 In the lubricating oil composition of one aspect of the present invention, the content (b) of the calcium-based detergent (B) in terms of calcium atoms is, for example, 1500% based on the total amount (100% by mass) of the lubricating oil composition. The content may be greater than or equal to 2,000 mass ppm, or may be greater than or equal to 2,300 mass ppm, or may be less than or equal to 2,800 mass ppm.
In this specification, the content of calcium atoms means a value measured in accordance with ASTM D5185.
本明細書において、カルシウム原子の含有量は、ASTM D5185に準拠して測定された値を意味する。 In the lubricating oil composition of one aspect of the present invention, the content (b) of the calcium-based detergent (B) in terms of calcium atoms is, for example, 1500% based on the total amount (100% by mass) of the lubricating oil composition. The content may be greater than or equal to 2,000 mass ppm, or may be greater than or equal to 2,300 mass ppm, or may be less than or equal to 2,800 mass ppm.
In this specification, the content of calcium atoms means a value measured in accordance with ASTM D5185.
≪カルシウムサリシレート(B1)≫
本発明の一態様で用いるカルシウムサリシレート(B1)としては、例えば、下記一般式(b-1)で表される化合物が挙げられる。
≪Calcium salicylate (B1)≫
Examples of the calcium salicylate (B1) used in one embodiment of the present invention include a compound represented by the following general formula (b-1).
本発明の一態様で用いるカルシウムサリシレート(B1)としては、例えば、下記一般式(b-1)で表される化合物が挙げられる。
Examples of the calcium salicylate (B1) used in one embodiment of the present invention include a compound represented by the following general formula (b-1).
上記一般式(b-1)中、Rは、それぞれ独立して、炭素数1~18の炭化水素基である。
Rとして選択し得る炭化水素基としては、炭素数1~18のアルキル基が挙げられる。 In the above general formula (b-1), each R is independently a hydrocarbon group having 1 to 18 carbon atoms.
Hydrocarbon groups that can be selected as R include alkyl groups having 1 to 18 carbon atoms.
Rとして選択し得る炭化水素基としては、炭素数1~18のアルキル基が挙げられる。 In the above general formula (b-1), each R is independently a hydrocarbon group having 1 to 18 carbon atoms.
Hydrocarbon groups that can be selected as R include alkyl groups having 1 to 18 carbon atoms.
本発明の一態様で用いるカルシウムサリシレート(B1)は、塩基価が100mgKOH/g以上の過塩基性カルシウムサリシレート(B11)であってもよく、塩基価が100mgKOH/g未満の中性カルシウムサリシレート(B12)であってもよく、これらを併用してもよい。
なお、本明細書において、塩基価は、ASTM D2896に準拠した過塩素酸法にて測定した値を意味する。 The calcium salicylate (B1) used in one aspect of the present invention may be an overbased calcium salicylate (B11) with a base number of 100 mgKOH/g or more, or a neutral calcium salicylate (B12) with a base number of less than 100 mgKOH/g. ), or these may be used in combination.
In addition, in this specification, a base value means the value measured by the perchloric acid method based on ASTM D2896.
なお、本明細書において、塩基価は、ASTM D2896に準拠した過塩素酸法にて測定した値を意味する。 The calcium salicylate (B1) used in one aspect of the present invention may be an overbased calcium salicylate (B11) with a base number of 100 mgKOH/g or more, or a neutral calcium salicylate (B12) with a base number of less than 100 mgKOH/g. ), or these may be used in combination.
In addition, in this specification, a base value means the value measured by the perchloric acid method based on ASTM D2896.
本発明の一態様で用いる過塩基性カルシウムサリシレート(B11)の塩基価は、120mgKOH/g以上、150mgKOH/g以上、170mgKOH/g以上、又は200mgKOH/g以上としてもよく、また、400mgKOH/g以下、又は350mgKOH/g以下としてもよい。
The base number of the overbased calcium salicylate (B11) used in one aspect of the present invention may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, and 400 mgKOH/g or less. , or 350 mgKOH/g or less.
本発明の一態様で用いる中性カルシウムサリシレート(B12)の塩基価は、0mgKOH/g以上、10mgKOH/g以上、20mgKOH/g以上、30mgKOH/g以上、又は40mgKOH/g以上としてもよく、また、70mgKOH/g以下としてもよい。
The base number of the neutral calcium salicylate (B12) used in one aspect of the present invention may be 0 mgKOH/g or more, 10 mgKOH/g or more, 20 mgKOH/g or more, 30 mgKOH/g or more, or 40 mgKOH/g or more, and It may be 70 mgKOH/g or less.
本発明の一態様の潤滑油組成物において、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムサリシレート(B1)のカルシウム原子換算の含有量(b1)の比率[(b1)/(b)]は、0.60以上、0.65以上、又は0.70以上としてもよく、また、1.00以下、0.95以下、0.90以下、又は0.85以下としてもよい。
In the lubricating oil composition of one embodiment of the present invention, the ratio of the content (b1) of calcium salicylate (B1) in terms of calcium atoms to the content (b) in terms of calcium atoms of the calcium-based detergent (B) [ (b1)/(b)] may be 0.60 or more, 0.65 or more, or 0.70 or more, or 1.00 or less, 0.95 or less, 0.90 or less, or 0.85 The following may be used.
本発明の一態様の潤滑油組成物において、過塩基性カルシウムサリシレート(B11)の含有量は、当該潤滑油組成物の全量(100質量%)基準で、0.1質量%以上、0.5質量%以上、1.0質量%以上、1.5質量%以上、1.7質量%以上であり、また、10.0質量%以下、7.0質量%以下、5.0質量%以下、4.0質量%以下である。
In the lubricating oil composition of one aspect of the present invention, the content of overbased calcium salicylate (B11) is 0.1% by mass or more and 0.5% by mass based on the total amount (100% by mass) of the lubricating oil composition. mass% or more, 1.0 mass% or more, 1.5 mass% or more, 1.7 mass% or more, and 10.0 mass% or less, 7.0 mass% or less, 5.0 mass% or less, It is 4.0% by mass or less.
本発明の一態様の潤滑油組成物において、中性カルシウムサリシレート(B12)の含有量は、当該潤滑油組成物の全量(100質量%)基準で1.0質量%以上、3.0質量%以上、5.0質量%以上、7.0質量%以上、9.0質量%以上であり、また、20.0質量%以下、17.0質量%以下、15.0質量%以下、12.0質量%以下である。
In the lubricating oil composition of one embodiment of the present invention, the content of neutral calcium salicylate (B12) is 1.0% by mass or more and 3.0% by mass based on the total amount (100% by mass) of the lubricating oil composition. 5.0% by mass or more, 7.0% by mass or more, 9.0% by mass or more, and 20.0% by mass or less, 17.0% by mass or less, 15.0% by mass or less, 12. It is 0% by mass or less.
≪中性カルシウムスルホネート(B2)≫
本発明の一態様の潤滑油組成物は、カルシウム系清浄剤(B)として、塩基価が70mgKOH/g以下の中性カルシウムスルホネート(B2)を含有してもよい。
ただし、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]は、0~0.40とすることが好ましい。
前記比率[(b2)/(b)]が0.40超である潤滑油組成物は、耐乳化性の低下が見られ、水の混入による増粘が懸念される。 ≪Neutral calcium sulfonate (B2)≫
The lubricating oil composition of one embodiment of the present invention may contain a neutral calcium sulfonate (B2) having a base number of 70 mgKOH/g or less as the calcium-based detergent (B).
However, the ratio of the content (b2) of the neutral calcium sulfonate (B2) in terms of calcium atoms to the content (b) of the calcium-based detergent (B) in terms of calcium atoms [(b2)/(b)] is preferably 0 to 0.40.
A lubricating oil composition in which the ratio [(b2)/(b)] is more than 0.40 exhibits a decrease in emulsification resistance, and there is a concern that the composition may thicken due to water contamination.
本発明の一態様の潤滑油組成物は、カルシウム系清浄剤(B)として、塩基価が70mgKOH/g以下の中性カルシウムスルホネート(B2)を含有してもよい。
ただし、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]は、0~0.40とすることが好ましい。
前記比率[(b2)/(b)]が0.40超である潤滑油組成物は、耐乳化性の低下が見られ、水の混入による増粘が懸念される。 ≪Neutral calcium sulfonate (B2)≫
The lubricating oil composition of one embodiment of the present invention may contain a neutral calcium sulfonate (B2) having a base number of 70 mgKOH/g or less as the calcium-based detergent (B).
However, the ratio of the content (b2) of the neutral calcium sulfonate (B2) in terms of calcium atoms to the content (b) of the calcium-based detergent (B) in terms of calcium atoms [(b2)/(b)] is preferably 0 to 0.40.
A lubricating oil composition in which the ratio [(b2)/(b)] is more than 0.40 exhibits a decrease in emulsification resistance, and there is a concern that the composition may thicken due to water contamination.
本発明の一態様の潤滑油組成物において、耐乳化性をより向上させた潤滑油組成物とする観点から、前記比率[(b2)/(b)]は、0.40以下、0.35以下、又は0.30以下としてもよく、また、0以上、0.05以上、0.10以上としてもよく、耐乳化性を特に向上させるという観点では、好ましくは0.15以上、より好ましくは0.20以上である。
In the lubricating oil composition of one embodiment of the present invention, from the viewpoint of providing a lubricating oil composition with further improved emulsification resistance, the ratio [(b2)/(b)] is 0.40 or less, 0.35 or less, or 0.30 or less, or 0 or more, 0.05 or more, or 0.10 or more, preferably 0.15 or more, more preferably 0.15 or more, from the viewpoint of particularly improving emulsification resistance. It is 0.20 or more.
本発明の一態様で用いる中性カルシウムスルホネート(B2)の塩基価は、70mgKOH/g以下であり、また、0mgKOH/g以上、10mgKOH/g以上、20mgKOH/g以上、30mgKOH/g以上、又は40mgKOH/g以上としてもよい。
The base number of the neutral calcium sulfonate (B2) used in one aspect of the present invention is 70 mgKOH/g or less, and is 0 mgKOH/g or more, 10 mgKOH/g or more, 20 mgKOH/g or more, 30 mgKOH/g or more, or 40 mgKOH/g or more. /g or more.
本発明の一態様で用いる中性カルシウムスルホネートとしては、例えば、下記一般式(b-2)で表される、塩基価が70mgKOH/g以下である化合物が挙げられる。
Examples of the neutral calcium sulfonate used in one embodiment of the present invention include a compound represented by the following general formula (b-2) and having a base value of 70 mgKOH/g or less.
上記一般式(b-2)中、Rは、それぞれ独立して、炭素数8~30の炭化水素基である。
Rとして選択し得る炭化水素基としては、例えば、炭素数8~30のアルキル基が挙げられる。 In the above general formula (b-2), each R is independently a hydrocarbon group having 8 to 30 carbon atoms.
Hydrocarbon groups that can be selected as R include, for example, alkyl groups having 8 to 30 carbon atoms.
Rとして選択し得る炭化水素基としては、例えば、炭素数8~30のアルキル基が挙げられる。 In the above general formula (b-2), each R is independently a hydrocarbon group having 8 to 30 carbon atoms.
Hydrocarbon groups that can be selected as R include, for example, alkyl groups having 8 to 30 carbon atoms.
本発明の一態様の潤滑油組成物において、良好な耐乳化性を有する潤滑油組成物とする観点から、中性カルシウムスルホネート(B2)の含有量は、当該潤滑油組成物の全量(100質量%)基準で、8.0質量%以下、6.0質量%以下、5.0質量%以下、4.0質量%以下、3.5質量%以下であり、また、0質量%以上、0.5質量%以上、1.0質量%以上、又は1.5質量%以上としてもよい。
In the lubricating oil composition of one embodiment of the present invention, the content of neutral calcium sulfonate (B2) is determined based on the total amount of the lubricating oil composition (100 mass %), 8.0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, 3.5% by mass or less, and 0% by mass or more, 0 It may be .5% by mass or more, 1.0% by mass or more, or 1.5% by mass or more.
≪カルシウムフェネート(B3)≫
本発明の一態様の潤滑油組成物は、カルシウム系清浄剤(B)として、カルシウムフェネート(B3)を含有してもよい。
ただし、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]は、0~0.02とすることが好ましい。
前記比率[(b3)/(b)]が0.02超である潤滑油組成物は、耐乳化性の低下が見られ、水の混入による増粘が懸念される。 ≪Calcium phenate (B3)≫
The lubricating oil composition of one embodiment of the present invention may contain calcium phenate (B3) as the calcium-based detergent (B).
However, the ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is , preferably 0 to 0.02.
A lubricating oil composition in which the ratio [(b3)/(b)] is more than 0.02 exhibits a decrease in emulsification resistance, and there is a concern that the composition may thicken due to water contamination.
本発明の一態様の潤滑油組成物は、カルシウム系清浄剤(B)として、カルシウムフェネート(B3)を含有してもよい。
ただし、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]は、0~0.02とすることが好ましい。
前記比率[(b3)/(b)]が0.02超である潤滑油組成物は、耐乳化性の低下が見られ、水の混入による増粘が懸念される。 ≪Calcium phenate (B3)≫
The lubricating oil composition of one embodiment of the present invention may contain calcium phenate (B3) as the calcium-based detergent (B).
However, the ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is , preferably 0 to 0.02.
A lubricating oil composition in which the ratio [(b3)/(b)] is more than 0.02 exhibits a decrease in emulsification resistance, and there is a concern that the composition may thicken due to water contamination.
本発明の一態様で用いるカルシウムフェネート(B3)としては、塩基価が100mgKOH/g以上の過塩基性カルシウムフェネート(B31)が挙げられる。
The calcium phenate (B3) used in one aspect of the present invention includes an overbased calcium phenate (B31) having a base value of 100 mgKOH/g or more.
本発明の一態様で用いる過塩基性カルシウムフェネート(B31)の塩基価は、120mgKOH/g以上、150mgKOH/g以上、170mgKOH/g以上、又は200mgKOH/g以上としてもよく、また、400mgKOH/g以下、又は350mgKOH/g以下としてもよい。
The base number of the overbased calcium phenate (B31) used in one aspect of the present invention may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, or 400 mgKOH/g It may be less than or equal to 350 mgKOH/g.
本発明の一態様で用いるカルシウムフェネート(B3)としては、例えば、下記一般式(b-3)で表される化合物が挙げられる。
Examples of the calcium phenate (B3) used in one embodiment of the present invention include a compound represented by the following general formula (b-3).
上記一般式(b-3)中、Rは、それぞれ独立して、炭素数8~30の炭化水素基であり、yは0以上の整数である。
Rとして選択し得る炭化水素基としては、例えば、炭素数8~30のアルキル基が挙げられる。 In the above general formula (b-3), each R is independently a hydrocarbon group having 8 to 30 carbon atoms, and y is an integer of 0 or more.
Hydrocarbon groups that can be selected as R include, for example, alkyl groups having 8 to 30 carbon atoms.
Rとして選択し得る炭化水素基としては、例えば、炭素数8~30のアルキル基が挙げられる。 In the above general formula (b-3), each R is independently a hydrocarbon group having 8 to 30 carbon atoms, and y is an integer of 0 or more.
Hydrocarbon groups that can be selected as R include, for example, alkyl groups having 8 to 30 carbon atoms.
≪過塩基性カルシウムスルホネート(B4)≫
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、塩基価が120mgKOH/g以上の過塩基性カルシウムスルホネート(B4)を含有してもよい。
過塩基性カルシウムスルホネート(B4)の塩基価は、120mgKOH/g以上、150mgKOH/g以上、170mgKOH/g以上、又は200mgKOH/g以上としてもよく、また、500mgKOH/g以下、400mgKOH/g以下、又は350mgKOH/g以下としてもよい。
ただし、良好な耐乳化性を有する潤滑油組成物とする観点から、このような他の金属系化合物の含有量は少ないほど好ましい。
本発明の一態様の潤滑油組成物において、良好な耐乳化性を有する潤滑油組成物とする観点から、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、過塩基性カルシウムスルホネート(B4)のカルシウム原子換算の含有量(b4)の比率[(b4)/(b)]は、好ましくは0.10未満である。 ≪Overbased calcium sulfonate (B4)≫
The lubricating oil composition of one embodiment of the present invention may contain an overbased calcium sulfonate (B4) having a base value of 120 mgKOH/g or more, as long as the effects of the present invention are not impaired.
The base number of the overbased calcium sulfonate (B4) may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, and may also be 500 mgKOH/g or less, 400 mgKOH/g or less, or It may be 350 mgKOH/g or less.
However, from the viewpoint of obtaining a lubricating oil composition having good emulsification resistance, it is preferable that the content of such other metal-based compounds is as small as possible.
In the lubricating oil composition of one embodiment of the present invention, from the viewpoint of providing a lubricating oil composition having good emulsification resistance, the amount of overbase relative to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is The ratio [(b4)/(b)] of the content (b4) of the calcium sulfonate (B4) in terms of calcium atoms is preferably less than 0.10.
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、塩基価が120mgKOH/g以上の過塩基性カルシウムスルホネート(B4)を含有してもよい。
過塩基性カルシウムスルホネート(B4)の塩基価は、120mgKOH/g以上、150mgKOH/g以上、170mgKOH/g以上、又は200mgKOH/g以上としてもよく、また、500mgKOH/g以下、400mgKOH/g以下、又は350mgKOH/g以下としてもよい。
ただし、良好な耐乳化性を有する潤滑油組成物とする観点から、このような他の金属系化合物の含有量は少ないほど好ましい。
本発明の一態様の潤滑油組成物において、良好な耐乳化性を有する潤滑油組成物とする観点から、カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、過塩基性カルシウムスルホネート(B4)のカルシウム原子換算の含有量(b4)の比率[(b4)/(b)]は、好ましくは0.10未満である。 ≪Overbased calcium sulfonate (B4)≫
The lubricating oil composition of one embodiment of the present invention may contain an overbased calcium sulfonate (B4) having a base value of 120 mgKOH/g or more, as long as the effects of the present invention are not impaired.
The base number of the overbased calcium sulfonate (B4) may be 120 mgKOH/g or more, 150 mgKOH/g or more, 170 mgKOH/g or more, or 200 mgKOH/g or more, and may also be 500 mgKOH/g or less, 400 mgKOH/g or less, or It may be 350 mgKOH/g or less.
However, from the viewpoint of obtaining a lubricating oil composition having good emulsification resistance, it is preferable that the content of such other metal-based compounds is as small as possible.
In the lubricating oil composition of one embodiment of the present invention, from the viewpoint of providing a lubricating oil composition having good emulsification resistance, the amount of overbase relative to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is The ratio [(b4)/(b)] of the content (b4) of the calcium sulfonate (B4) in terms of calcium atoms is preferably less than 0.10.
<成分(C):粘度指数向上剤>
本発明の一態様の潤滑油組成物は、さらに粘度指数向上剤(C)を含有してもよい。粘度指数向上剤を含有することで、省燃費性が良好な潤滑油組成物とすることができる。
なお、本発明の一態様で用いる粘度指数向上剤(C)は、単独で用いてもよく、2種以上を併用してもよい。 <Component (C): Viscosity index improver>
The lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver (C). By containing the viscosity index improver, a lubricating oil composition with good fuel efficiency can be obtained.
Note that the viscosity index improver (C) used in one embodiment of the present invention may be used alone or in combination of two or more.
本発明の一態様の潤滑油組成物は、さらに粘度指数向上剤(C)を含有してもよい。粘度指数向上剤を含有することで、省燃費性が良好な潤滑油組成物とすることができる。
なお、本発明の一態様で用いる粘度指数向上剤(C)は、単独で用いてもよく、2種以上を併用してもよい。 <Component (C): Viscosity index improver>
The lubricating oil composition of one embodiment of the present invention may further contain a viscosity index improver (C). By containing the viscosity index improver, a lubricating oil composition with good fuel efficiency can be obtained.
Note that the viscosity index improver (C) used in one embodiment of the present invention may be used alone or in combination of two or more.
本発明の一態様で用いる粘度指数向上剤(C)としては、例えば、非分散型ポリメタクリレート、分散型ポリメタクリレート、オレフィン系共重合体(例えば、エチレン-プロピレン共重合体等)、分散型オレフィン系共重合体、スチレン系共重合体(例えば、スチレン-ジエン共重合体、スチレン-イソプレン共重合体等)等の重合体が挙げられる。
本発明の一態様で用いる粘度指数向上剤(C)は、高分子量の側鎖が出ている三叉分岐点を主鎖に数多くもつ構造を有する櫛形ポリマーであってもよく、炭素原子等の一つの原子が3本以上の鎖状高分子が結合している構造を有する星形ポリマーであってもよい。 Examples of the viscosity index improver (C) used in one embodiment of the present invention include non-dispersed polymethacrylates, dispersed polymethacrylates, olefin copolymers (e.g., ethylene-propylene copolymers, etc.), and dispersed olefins. Examples include polymers such as styrene-based copolymers, styrene-based copolymers (eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.).
The viscosity index improver (C) used in one embodiment of the present invention may be a comb-shaped polymer having a structure in which the main chain has many trifurcated branch points from which high-molecular-weight side chains emerge, It may be a star-shaped polymer having a structure in which three or more chain polymers each having one atom are bonded to each other.
本発明の一態様で用いる粘度指数向上剤(C)は、高分子量の側鎖が出ている三叉分岐点を主鎖に数多くもつ構造を有する櫛形ポリマーであってもよく、炭素原子等の一つの原子が3本以上の鎖状高分子が結合している構造を有する星形ポリマーであってもよい。 Examples of the viscosity index improver (C) used in one embodiment of the present invention include non-dispersed polymethacrylates, dispersed polymethacrylates, olefin copolymers (e.g., ethylene-propylene copolymers, etc.), and dispersed olefins. Examples include polymers such as styrene-based copolymers, styrene-based copolymers (eg, styrene-diene copolymers, styrene-isoprene copolymers, etc.).
The viscosity index improver (C) used in one embodiment of the present invention may be a comb-shaped polymer having a structure in which the main chain has many trifurcated branch points from which high-molecular-weight side chains emerge, It may be a star-shaped polymer having a structure in which three or more chain polymers each having one atom are bonded to each other.
本発明の一態様の潤滑油組成物において、コーキングの発生量を抑制し得る潤滑油組成物とする観点から、粘度指数向上剤(C)の樹脂分換算での含有量は、当該潤滑油組成物の全量(100質量%)基準で、好ましくは0.40質量%以下、より好ましくは0.35質量%以下、更に好ましくは0.30質量%以下であり、また、0.01質量%以上、0.02質量%以上、0.03質量%以上、0.04質量%以上、又は0.05質量%以上としてもよい。
In the lubricating oil composition of one embodiment of the present invention, from the viewpoint of making the lubricating oil composition capable of suppressing the amount of coking, the content of the viscosity index improver (C) in terms of resin content is set in the lubricating oil composition. Based on the total amount (100% by mass) of the product, preferably 0.40% by mass or less, more preferably 0.35% by mass or less, even more preferably 0.30% by mass or less, and 0.01% by mass or more. , 0.02% by mass or more, 0.03% by mass or more, 0.04% by mass or more, or 0.05% by mass or more.
なお、本発明の一態様で用いる粘度指数向上剤(C)や後述の流動点降下剤及び消泡剤は、通常はハンドリング性や基油(A)との溶解性を考慮し、鉱油や合成油等の希釈油により溶解された溶液の形態で市販されていることが多い。ただし、上記の粘度指数向上剤(C)の含有量は、希釈油を除外した樹脂分(固形分)換算での含有量を意味する。
Note that the viscosity index improver (C) used in one embodiment of the present invention, the pour point depressant, and the antifoaming agent described below are usually made from mineral oil or synthetic oil, taking into consideration handling properties and solubility with the base oil (A). It is often commercially available in the form of a solution dissolved in a diluent oil such as oil. However, the above content of the viscosity index improver (C) means the content in terms of resin content (solid content) excluding diluent oil.
<潤滑油用添加剤>
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、必要に応じて、更に成分(B)~(C)以外の他の潤滑油用添加剤を含有してもよい。
このような潤滑油用添加剤としては、例えば、成分(B)以外の金属系清浄剤、流動点降下剤、酸化防止剤、摩擦調整剤、耐摩耗剤、金属不活性化剤、無灰分散剤、金属不活性化剤、消泡剤等が挙げられる。
これらの潤滑油用添加剤は、それぞれ、単独で用いてもよく、2種以上を併用してもよい。 <Additives for lubricating oil>
The lubricating oil composition of one embodiment of the present invention may further contain lubricating oil additives other than components (B) to (C), as necessary, as long as the effects of the present invention are not impaired. good.
Examples of such lubricating oil additives include metal detergents other than component (B), pour point depressants, antioxidants, friction modifiers, antiwear agents, metal deactivators, and ashless dispersants. , metal deactivators, antifoaming agents, and the like.
These lubricating oil additives may be used alone or in combination of two or more.
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、必要に応じて、更に成分(B)~(C)以外の他の潤滑油用添加剤を含有してもよい。
このような潤滑油用添加剤としては、例えば、成分(B)以外の金属系清浄剤、流動点降下剤、酸化防止剤、摩擦調整剤、耐摩耗剤、金属不活性化剤、無灰分散剤、金属不活性化剤、消泡剤等が挙げられる。
これらの潤滑油用添加剤は、それぞれ、単独で用いてもよく、2種以上を併用してもよい。 <Additives for lubricating oil>
The lubricating oil composition of one embodiment of the present invention may further contain lubricating oil additives other than components (B) to (C), as necessary, as long as the effects of the present invention are not impaired. good.
Examples of such lubricating oil additives include metal detergents other than component (B), pour point depressants, antioxidants, friction modifiers, antiwear agents, metal deactivators, and ashless dispersants. , metal deactivators, antifoaming agents, and the like.
These lubricating oil additives may be used alone or in combination of two or more.
[金属系清浄剤]
本発明の一様態の潤滑油組成物は、さらに成分(B)以外の金属系清浄剤を含有してもよく、含有しなくてもよい。
金属系清浄剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる金属系清浄剤としては、金属スルホネート、金属サリシレート、及び金属フェネート等の金属塩が挙げられる。また、当該金属塩を構成する金属原子としては、アルカリ金属及びアルカリ土類金属(Caを除く)から選ばれる金属原子が挙げられ、より具体的には、ナトリウム又はマグネシウムが挙げられる。
なお、本発明の一態様で用いる金属系清浄剤としては、中性金属系清浄剤であってもよく、過塩基性金属系清浄剤であってもよい。 [Metal cleaning agent]
The lubricating oil composition of one embodiment of the present invention may or may not further contain a metal detergent other than component (B).
Metal-based detergents may be used alone or in combination of two or more.
Metal-based detergents used in one embodiment of the present invention include metal salts such as metal sulfonates, metal salicylates, and metal phenates. Further, examples of the metal atoms constituting the metal salt include metal atoms selected from alkali metals and alkaline earth metals (excluding Ca), and more specifically, sodium or magnesium.
Note that the metal-based detergent used in one embodiment of the present invention may be a neutral metal-based detergent or an overbased metal-based detergent.
本発明の一様態の潤滑油組成物は、さらに成分(B)以外の金属系清浄剤を含有してもよく、含有しなくてもよい。
金属系清浄剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる金属系清浄剤としては、金属スルホネート、金属サリシレート、及び金属フェネート等の金属塩が挙げられる。また、当該金属塩を構成する金属原子としては、アルカリ金属及びアルカリ土類金属(Caを除く)から選ばれる金属原子が挙げられ、より具体的には、ナトリウム又はマグネシウムが挙げられる。
なお、本発明の一態様で用いる金属系清浄剤としては、中性金属系清浄剤であってもよく、過塩基性金属系清浄剤であってもよい。 [Metal cleaning agent]
The lubricating oil composition of one embodiment of the present invention may or may not further contain a metal detergent other than component (B).
Metal-based detergents may be used alone or in combination of two or more.
Metal-based detergents used in one embodiment of the present invention include metal salts such as metal sulfonates, metal salicylates, and metal phenates. Further, examples of the metal atoms constituting the metal salt include metal atoms selected from alkali metals and alkaline earth metals (excluding Ca), and more specifically, sodium or magnesium.
Note that the metal-based detergent used in one embodiment of the present invention may be a neutral metal-based detergent or an overbased metal-based detergent.
なお、本発明の一態様の潤滑油組成物において、成分(B)を含有する場合、成分(B)以外の金属系清浄剤は含有しなくてもよい。
本発明の一態様の潤滑油組成物が成分(B)を含有する場合、成分(B)以外の金属系清浄剤の含有量は、当該潤滑油組成物に含まれる成分(B)の全量100質量部に対して、50質量部未満、20質量部未満、10質量部未満、5.0質量部未満、2.0質量部未満、1.0質量部未満、0.10質量部未満、0.01質量部未満、又は0.001質量部未満としてもよい。 In addition, in the lubricating oil composition of one aspect of the present invention, when containing component (B), it is not necessary to contain metal-based detergents other than component (B).
When the lubricating oil composition of one embodiment of the present invention contains component (B), the content of metal-based detergents other than component (B) is 100% of the total amount of component (B) contained in the lubricating oil composition. Based on parts by mass, less than 50 parts by mass, less than 20 parts by mass, less than 10 parts by mass, less than 5.0 parts by mass, less than 2.0 parts by mass, less than 1.0 parts by mass, less than 0.10 parts by mass, 0 It may be less than .01 part by mass or less than 0.001 part by mass.
本発明の一態様の潤滑油組成物が成分(B)を含有する場合、成分(B)以外の金属系清浄剤の含有量は、当該潤滑油組成物に含まれる成分(B)の全量100質量部に対して、50質量部未満、20質量部未満、10質量部未満、5.0質量部未満、2.0質量部未満、1.0質量部未満、0.10質量部未満、0.01質量部未満、又は0.001質量部未満としてもよい。 In addition, in the lubricating oil composition of one aspect of the present invention, when containing component (B), it is not necessary to contain metal-based detergents other than component (B).
When the lubricating oil composition of one embodiment of the present invention contains component (B), the content of metal-based detergents other than component (B) is 100% of the total amount of component (B) contained in the lubricating oil composition. Based on parts by mass, less than 50 parts by mass, less than 20 parts by mass, less than 10 parts by mass, less than 5.0 parts by mass, less than 2.0 parts by mass, less than 1.0 parts by mass, less than 0.10 parts by mass, 0 It may be less than .01 part by mass or less than 0.001 part by mass.
[流動点降下剤]
本発明の一態様の潤滑油組成物は、さらに流動点降下剤を含有してもよい。流動点降下剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いられる流動点降下剤としては、例えば、ポリメタクリレート、アルキル化芳香族化合物、フマレートと酢酸ビニルの共重合体、エチレンと酢酸ビニルの共重合体が挙げられ、重量平均分子量が40,000~200,000のポリメタクリレートが好ましい。 [Pour point depressant]
The lubricating oil composition of one aspect of the present invention may further contain a pour point depressant. The pour point depressants may be used alone or in combination of two or more.
Pour point depressants used in one aspect of the present invention include, for example, polymethacrylates, alkylated aromatic compounds, copolymers of fumarate and vinyl acetate, copolymers of ethylene and vinyl acetate, and have weight average molecular weight Polymethacrylates having a molecular weight of 40,000 to 200,000 are preferred.
本発明の一態様の潤滑油組成物は、さらに流動点降下剤を含有してもよい。流動点降下剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いられる流動点降下剤としては、例えば、ポリメタクリレート、アルキル化芳香族化合物、フマレートと酢酸ビニルの共重合体、エチレンと酢酸ビニルの共重合体が挙げられ、重量平均分子量が40,000~200,000のポリメタクリレートが好ましい。 [Pour point depressant]
The lubricating oil composition of one aspect of the present invention may further contain a pour point depressant. The pour point depressants may be used alone or in combination of two or more.
Pour point depressants used in one aspect of the present invention include, for example, polymethacrylates, alkylated aromatic compounds, copolymers of fumarate and vinyl acetate, copolymers of ethylene and vinyl acetate, and have weight average molecular weight Polymethacrylates having a molecular weight of 40,000 to 200,000 are preferred.
[酸化防止剤]
本発明の一態様の潤滑油組成物は、さらに酸化防止剤を含有してもよい。酸化防止剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる酸化防止剤としては、例えば、アルキル化ジフェニルアミン、フェニルナフチルアミン、アルキル化フェニルナフチルアミン等のアミン系酸化防止剤;2、6-ジ-t-ブチルフェノール、4,4’-メチレンビス(2,6ージーtーブチルフェノール)、イソオクチル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート、n-オクタデシル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート等のフェノール系酸化防止剤;フェノチアジン、ジオクタデシルサルファイド、ジラウリル-3,3'-チオジプロピオネート、2-メルカプトベンゾイミダゾール等の硫黄系酸化防止剤;等が挙げられる。 [Antioxidant]
The lubricating oil composition of one embodiment of the present invention may further contain an antioxidant. The antioxidants may be used alone or in combination of two or more.
Examples of the antioxidant used in one embodiment of the present invention include amine antioxidants such as alkylated diphenylamine, phenylnaphthylamine, and alkylated phenylnaphthylamine; 2,6-di-t-butylphenol, and 4,4'-methylenebis (2,6-di-t-butylphenol), isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, n-octadecyl-3-(3,5-di-t-butyl-4 Examples include phenolic antioxidants such as -hydroxyphenyl)propionate; sulfur-based antioxidants such as phenothiazine, dioctadecyl sulfide, dilauryl-3,3'-thiodipropionate, and 2-mercaptobenzimidazole; and the like.
本発明の一態様の潤滑油組成物は、さらに酸化防止剤を含有してもよい。酸化防止剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる酸化防止剤としては、例えば、アルキル化ジフェニルアミン、フェニルナフチルアミン、アルキル化フェニルナフチルアミン等のアミン系酸化防止剤;2、6-ジ-t-ブチルフェノール、4,4’-メチレンビス(2,6ージーtーブチルフェノール)、イソオクチル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート、n-オクタデシル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート等のフェノール系酸化防止剤;フェノチアジン、ジオクタデシルサルファイド、ジラウリル-3,3'-チオジプロピオネート、2-メルカプトベンゾイミダゾール等の硫黄系酸化防止剤;等が挙げられる。 [Antioxidant]
The lubricating oil composition of one embodiment of the present invention may further contain an antioxidant. The antioxidants may be used alone or in combination of two or more.
Examples of the antioxidant used in one embodiment of the present invention include amine antioxidants such as alkylated diphenylamine, phenylnaphthylamine, and alkylated phenylnaphthylamine; 2,6-di-t-butylphenol, and 4,4'-methylenebis (2,6-di-t-butylphenol), isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, n-octadecyl-3-(3,5-di-t-butyl-4 Examples include phenolic antioxidants such as -hydroxyphenyl)propionate; sulfur-based antioxidants such as phenothiazine, dioctadecyl sulfide, dilauryl-3,3'-thiodipropionate, and 2-mercaptobenzimidazole; and the like.
[摩擦調整剤及び耐摩耗剤]
本発明の一態様の潤滑油組成物は、さらに摩擦調整剤又は耐摩耗剤を含有してもよい。摩擦調整剤又は耐摩耗剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる摩擦調整剤及び耐摩耗剤としては、例えば、摩擦調整剤及び耐摩耗剤としては、例えば、硫化オレフィン、ジアルキルポリスルフィド、ジアリールアルキルポリスルフィド、ジアリールポリスルフィド等の硫黄系化合物;リン酸エステル、チオリン酸エステル、亜リン酸エステル、アルキルハイドロゲンホスファイト、リン酸エステルアミン塩、亜リン酸エステルアミン塩等のリン系化合物;ジチオカルバミン酸モリブデン(MoDTC)、ジチオリン酸モリブデン(MoDTP)、モリブテン酸のアミン塩等の有機モリブデン系化合物;ジチオリン酸亜鉛(ZnDTP)、ジチオカルバミン酸亜鉛(ZnDTC)等の有機亜鉛系化合物;アミン化合物、脂肪酸エステル、脂肪酸アミド、脂肪酸、脂肪族アルコール、脂肪族エーテル、ウレア系化合物、ヒドラジド系化合物等の無灰系摩擦調整剤;等が挙げられる。 [Friction modifier and anti-wear agent]
The lubricating oil composition of one embodiment of the present invention may further contain a friction modifier or an antiwear agent. The friction modifier or anti-wear agent may be used alone or in combination of two or more.
Examples of friction modifiers and antiwear agents used in one embodiment of the present invention include sulfur-based compounds such as sulfurized olefins, dialkyl polysulfides, diarylalkyl polysulfides, and diaryl polysulfides; Phosphorous compounds such as acid esters, thiophosphate esters, phosphite esters, alkyl hydrogen phosphites, phosphate ester amine salts, phosphite ester amine salts; molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), molybdenum Organic molybdenum compounds such as amine salts of acids; organic zinc compounds such as zinc dithiophosphate (ZnDTP) and zinc dithiocarbamate (ZnDTC); amine compounds, fatty acid esters, fatty acid amides, fatty acids, fatty alcohols, aliphatic ethers, Examples include ashless friction modifiers such as urea compounds and hydrazide compounds.
本発明の一態様の潤滑油組成物は、さらに摩擦調整剤又は耐摩耗剤を含有してもよい。摩擦調整剤又は耐摩耗剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる摩擦調整剤及び耐摩耗剤としては、例えば、摩擦調整剤及び耐摩耗剤としては、例えば、硫化オレフィン、ジアルキルポリスルフィド、ジアリールアルキルポリスルフィド、ジアリールポリスルフィド等の硫黄系化合物;リン酸エステル、チオリン酸エステル、亜リン酸エステル、アルキルハイドロゲンホスファイト、リン酸エステルアミン塩、亜リン酸エステルアミン塩等のリン系化合物;ジチオカルバミン酸モリブデン(MoDTC)、ジチオリン酸モリブデン(MoDTP)、モリブテン酸のアミン塩等の有機モリブデン系化合物;ジチオリン酸亜鉛(ZnDTP)、ジチオカルバミン酸亜鉛(ZnDTC)等の有機亜鉛系化合物;アミン化合物、脂肪酸エステル、脂肪酸アミド、脂肪酸、脂肪族アルコール、脂肪族エーテル、ウレア系化合物、ヒドラジド系化合物等の無灰系摩擦調整剤;等が挙げられる。 [Friction modifier and anti-wear agent]
The lubricating oil composition of one embodiment of the present invention may further contain a friction modifier or an antiwear agent. The friction modifier or anti-wear agent may be used alone or in combination of two or more.
Examples of friction modifiers and antiwear agents used in one embodiment of the present invention include sulfur-based compounds such as sulfurized olefins, dialkyl polysulfides, diarylalkyl polysulfides, and diaryl polysulfides; Phosphorous compounds such as acid esters, thiophosphate esters, phosphite esters, alkyl hydrogen phosphites, phosphate ester amine salts, phosphite ester amine salts; molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), molybdenum Organic molybdenum compounds such as amine salts of acids; organic zinc compounds such as zinc dithiophosphate (ZnDTP) and zinc dithiocarbamate (ZnDTC); amine compounds, fatty acid esters, fatty acid amides, fatty acids, fatty alcohols, aliphatic ethers, Examples include ashless friction modifiers such as urea compounds and hydrazide compounds.
[金属不活性化剤]
本発明の一態様の潤滑油組成物は、さらに金属不活性化剤を含有してもよい。金属不活性化剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる金属不活性化剤としては、例えば、ベンゾトリアゾール、トリアゾール誘導体、ベンゾトリアゾール誘導体、チアジアゾール誘導体等が挙げられる。 [Metal deactivator]
The lubricating oil composition of one embodiment of the present invention may further contain a metal deactivator. The metal deactivators may be used alone or in combination of two or more.
Examples of the metal deactivator used in one embodiment of the present invention include benzotriazole, triazole derivatives, benzotriazole derivatives, thiadiazole derivatives, and the like.
本発明の一態様の潤滑油組成物は、さらに金属不活性化剤を含有してもよい。金属不活性化剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる金属不活性化剤としては、例えば、ベンゾトリアゾール、トリアゾール誘導体、ベンゾトリアゾール誘導体、チアジアゾール誘導体等が挙げられる。 [Metal deactivator]
The lubricating oil composition of one embodiment of the present invention may further contain a metal deactivator. The metal deactivators may be used alone or in combination of two or more.
Examples of the metal deactivator used in one embodiment of the present invention include benzotriazole, triazole derivatives, benzotriazole derivatives, thiadiazole derivatives, and the like.
[無灰系分散剤]
本発明の一態様の潤滑油組成物は、分散性を良好とする観点から、さらに無灰系分散剤を含有してもよい。無灰系分散剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる無灰系分散剤としては、アルケニルコハク酸イミドが好ましく、例えば、下記一般式(f-1)で表されるアルケニルコハク酸ビスイミド、下記一般式(f-2)で表されるアルケニルコハク酸モノイミド等が挙げられる。 [Ashless dispersant]
The lubricating oil composition of one embodiment of the present invention may further contain an ashless dispersant from the viewpoint of improving dispersibility. The ashless dispersants may be used alone or in combination of two or more.
The ashless dispersant used in one aspect of the present invention is preferably an alkenylsuccinimide, such as alkenylsuccinimide represented by the following general formula (f-1), or alkenylsuccinimide represented by the following general formula (f-2). Examples include the alkenylsuccinic acid monoimides shown below.
本発明の一態様の潤滑油組成物は、分散性を良好とする観点から、さらに無灰系分散剤を含有してもよい。無灰系分散剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる無灰系分散剤としては、アルケニルコハク酸イミドが好ましく、例えば、下記一般式(f-1)で表されるアルケニルコハク酸ビスイミド、下記一般式(f-2)で表されるアルケニルコハク酸モノイミド等が挙げられる。 [Ashless dispersant]
The lubricating oil composition of one embodiment of the present invention may further contain an ashless dispersant from the viewpoint of improving dispersibility. The ashless dispersants may be used alone or in combination of two or more.
The ashless dispersant used in one aspect of the present invention is preferably an alkenylsuccinimide, such as alkenylsuccinimide represented by the following general formula (f-1), or alkenylsuccinimide represented by the following general formula (f-2). Examples include the alkenylsuccinic acid monoimides shown below.
上記一般式(f-1)及び(f-2)中、Rf1、Rf2及びRf3は、それぞれ独立に、数平均分子量(Mn)が900~2500のアルケニル基である。
Rf1、Rf2及びRf3として選択し得る、前記アルケニル基としては、例えば、ポリブテニル基、ポリイソブテニル基等が挙げられる。
Af1、Af2及びAf3は、それぞれ独立に、炭素数2~5のアルキレン基である。
x1は2~6の整数である。
x2は2~6の整数である。 In the above general formulas (f-1) and (f-2), R f1 , R f2 and R f3 are each independently an alkenyl group having a number average molecular weight (Mn) of 900 to 2,500.
Examples of the alkenyl group that can be selected as R f1 , R f2 and R f3 include a polybutenyl group, a polyisobutenyl group, and the like.
A f1 , A f2 and A f3 are each independently an alkylene group having 2 to 5 carbon atoms.
x1 is an integer from 2 to 6.
x2 is an integer from 2 to 6.
Rf1、Rf2及びRf3として選択し得る、前記アルケニル基としては、例えば、ポリブテニル基、ポリイソブテニル基等が挙げられる。
Af1、Af2及びAf3は、それぞれ独立に、炭素数2~5のアルキレン基である。
x1は2~6の整数である。
x2は2~6の整数である。 In the above general formulas (f-1) and (f-2), R f1 , R f2 and R f3 are each independently an alkenyl group having a number average molecular weight (Mn) of 900 to 2,500.
Examples of the alkenyl group that can be selected as R f1 , R f2 and R f3 include a polybutenyl group, a polyisobutenyl group, and the like.
A f1 , A f2 and A f3 are each independently an alkylene group having 2 to 5 carbon atoms.
x1 is an integer from 2 to 6.
x2 is an integer from 2 to 6.
なお、前記一般式(f-1)又は(f-2)で表される化合物は、ホウ素化合物、アルコール、アルデヒド、ケトン、アルキルフェノール、環状カーボネート、エポキシ化合物、及び有機酸等から選ばれる1種以上と反応させた、変性アルケニルコハク酸イミドであってもよい。
The compound represented by the general formula (f-1) or (f-2) is one or more selected from boron compounds, alcohols, aldehydes, ketones, alkylphenols, cyclic carbonates, epoxy compounds, organic acids, etc. It may also be a modified alkenylsuccinimide reacted with.
[消泡剤]
本発明の一態様の潤滑油組成物は、さらに消泡剤を含有してもよい。消泡剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる消泡剤としては、例えば、アルキルシリコーン系消泡剤、フルオロシリコーン系消泡剤、フルオロアルキルエーテル系消泡剤等が挙げられる。 [Defoaming agent]
The lubricating oil composition of one embodiment of the present invention may further contain an antifoaming agent. Antifoaming agents may be used alone or in combination of two or more.
Examples of the antifoaming agent used in one embodiment of the present invention include alkyl silicone antifoaming agents, fluorosilicone antifoaming agents, fluoroalkyl ether antifoaming agents, and the like.
本発明の一態様の潤滑油組成物は、さらに消泡剤を含有してもよい。消泡剤は、単独で用いてもよく、2種以上を併用してもよい。
本発明の一態様で用いる消泡剤としては、例えば、アルキルシリコーン系消泡剤、フルオロシリコーン系消泡剤、フルオロアルキルエーテル系消泡剤等が挙げられる。 [Defoaming agent]
The lubricating oil composition of one embodiment of the present invention may further contain an antifoaming agent. Antifoaming agents may be used alone or in combination of two or more.
Examples of the antifoaming agent used in one embodiment of the present invention include alkyl silicone antifoaming agents, fluorosilicone antifoaming agents, fluoroalkyl ether antifoaming agents, and the like.
〔潤滑油組成物の性状〕
本発明の一態様の潤滑油組成物の40℃における動粘度は、好ましくは10~150mm2/s、より好ましくは20~120mm2/s、より好ましくは30~110mm2/s、更に好ましくは40~100mm2/s、より更に好ましくは50~90mm2/s、特に好ましくは55~85mm2/sである。 [Properties of lubricating oil composition]
The kinematic viscosity at 40°C of the lubricating oil composition of one aspect of the present invention is preferably 10 to 150 mm 2 /s, more preferably 20 to 120 mm 2 /s, more preferably 30 to 110 mm 2 /s, even more preferably The speed is 40 to 100 mm 2 /s, more preferably 50 to 90 mm 2 /s, particularly preferably 55 to 85 mm 2 /s.
本発明の一態様の潤滑油組成物の40℃における動粘度は、好ましくは10~150mm2/s、より好ましくは20~120mm2/s、より好ましくは30~110mm2/s、更に好ましくは40~100mm2/s、より更に好ましくは50~90mm2/s、特に好ましくは55~85mm2/sである。 [Properties of lubricating oil composition]
The kinematic viscosity at 40°C of the lubricating oil composition of one aspect of the present invention is preferably 10 to 150 mm 2 /s, more preferably 20 to 120 mm 2 /s, more preferably 30 to 110 mm 2 /s, even more preferably The speed is 40 to 100 mm 2 /s, more preferably 50 to 90 mm 2 /s, particularly preferably 55 to 85 mm 2 /s.
本発明の一態様の潤滑油組成物の100℃における動粘度は、好ましくは9.5mm2/s以上であり、また、上限値は特に限定されないが、例えば、16.3mm2/s未満であってもよい。
The kinematic viscosity at 100° C. of the lubricating oil composition of one embodiment of the present invention is preferably 9.5 mm 2 /s or more, and the upper limit is not particularly limited, but for example, less than 16.3 mm 2 /s. There may be.
本発明の一態様の潤滑油組成物の粘度指数は、好ましくは80以上、より好ましくは100以上、より好ましくは110以上、更に好ましくは120以上、より更に好ましくは130以上である。
The viscosity index of the lubricating oil composition of one embodiment of the present invention is preferably 80 or more, more preferably 100 or more, more preferably 110 or more, even more preferably 120 or more, and even more preferably 130 or more.
本発明の一態様の潤滑油組成物に対して、後述の実施例に記載の方法に基づいて測定及び算出したミスト化率は、好ましくは0.90質量%以下、より好ましくは0.80質量%以下、更に好ましくは0.70質量%以下、よりさら好ましくは0.65質量%以下、特に好ましくは0.60質量%以下である。
The mist formation rate of the lubricating oil composition of one embodiment of the present invention, measured and calculated based on the method described in the Examples below, is preferably 0.90% by mass or less, more preferably 0.80% by mass. % or less, more preferably 0.70% by mass or less, even more preferably 0.65% by mass or less, particularly preferably 0.60% by mass or less.
本発明の一態様の潤滑油組成物に対して、Fed.TestMethodStd.791-3462に準拠して実施例に記載の方法に基づいて、油温90℃、パネル温度300℃の条件下で24時間のパネルコーキング試験を行った際に、パネルに付着したコーキング物の付着量は、好ましくは150mg以下、更に好ましくは110mg以下、より更に好ましくは100mg以下、特に好ましくは80mg以下である。
The lubricating oil composition of one embodiment of the present invention was prepared for 24 hours at an oil temperature of 90°C and a panel temperature of 300°C based on the method described in the Examples in accordance with Fed.TestMethodStd.791-3462. When performing the panel caulking test, the amount of caulking material adhering to the panel is preferably 150 mg or less, more preferably 110 mg or less, even more preferably 100 mg or less, particularly preferably 80 mg or less.
本発明の一態様の潤滑油組成物の塩基価(過塩素酸法)は、5.0mgKOH/g以上、7.0mgKOH/g以上、9.0mgKOH/g以上、又は9.2mgKOH/g以上としてもよく、また、15.0mgKOH/g以下、12.0mgKOH/g以下、又は10.0mgKOH/g以下としてもよい。
The base number (perchloric acid method) of the lubricating oil composition of one embodiment of the present invention is 5.0 mgKOH/g or more, 7.0 mgKOH/g or more, 9.0 mgKOH/g or more, or 9.2 mgKOH/g or more. It may also be 15.0 mgKOH/g or less, 12.0 mgKOH/g or less, or 10.0 mgKOH/g or less.
本発明の一態様の潤滑油組成物を試料とし、ASTM D 2619「Standard Test Method for Hydrolytic Stability of Hydraulic Fluids(Beverage Bottle Method)」の試験法に準拠して、試料75mLを入れた容器に銅触媒、蒸留水25mLを入れて、後述の実施例の操作により測定した、エマルション層の体積割合は、好ましくは30体積%以下、より好ましくは28体積%以下、更に好ましくは26体積%以下である。
Using the lubricating oil composition of one embodiment of the present invention as a sample, a copper catalyst was placed in a container containing 75 mL of the sample in accordance with the test method of ASTM D 2619 "Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)". The volume ratio of the emulsion layer, measured by adding 25 mL of distilled water and performing the operations in the examples described later, is preferably 30 volume % or less, more preferably 28 volume % or less, and even more preferably 26 volume % or less.
〔潤滑油組成物の用途〕
本発明の一態様の潤滑油組成物は、高温環境下での耐ミスト性が優れており、コーキングの抑制効果が高い。
そのため、本発明の一態様の潤滑油組成物は、上記特性を発揮し得る各種装置に適用することができるが、内燃機関における各部品間の潤滑に好適に使用し得る。そして、内燃機関の中でも、特に、ターボタージャーを備え、水素を燃料として作動する内燃機関(水素燃料エンジン)における各部品間の潤滑により好適に使用し得る。ターボタージャーを備える水素燃料エンジンは、燃料が水素であるため燃焼室内が非常に高温となり、潤滑油組成物がミスト化し易い環境にある。ミスト化した潤滑油組成物は、排気通路側に設置されたターボチャージャーのタービンホイールに排出されるが、タービンホイールに粘着してコーキング発生の要因となる。これに対して、本発明の一態様の潤滑油組成物は、高温環境下での耐ミスト性に優れているため、ターボタージャーを備える水素燃料エンジンに用いても、タービンホイールに粘着する潤滑油組成物の量を抑制し、コーキングの発生を効果的に抑制することができる。 [Applications of lubricating oil composition]
The lubricating oil composition of one embodiment of the present invention has excellent mist resistance in a high-temperature environment and is highly effective in suppressing coking.
Therefore, the lubricating oil composition of one embodiment of the present invention can be applied to various devices that can exhibit the above characteristics, and can be suitably used for lubrication between various parts in an internal combustion engine. Among internal combustion engines, the present invention can be particularly suitably used for lubricating various parts in an internal combustion engine (hydrogen fuel engine) that is equipped with a turbotarger and operates using hydrogen as fuel. In a hydrogen fuel engine equipped with a turbotarger, since the fuel is hydrogen, the temperature inside the combustion chamber is extremely high, and the lubricating oil composition is in an environment where it is easy to turn into mist. The misted lubricating oil composition is discharged to the turbine wheel of the turbocharger installed on the exhaust passage side, but it sticks to the turbine wheel and causes coking. In contrast, the lubricating oil composition of one embodiment of the present invention has excellent mist resistance in high-temperature environments, so even when used in a hydrogen fuel engine equipped with a turbotarger, the lubricating oil composition adheres to the turbine wheel. By suppressing the amount of oil composition, it is possible to effectively suppress the occurrence of coking.
本発明の一態様の潤滑油組成物は、高温環境下での耐ミスト性が優れており、コーキングの抑制効果が高い。
そのため、本発明の一態様の潤滑油組成物は、上記特性を発揮し得る各種装置に適用することができるが、内燃機関における各部品間の潤滑に好適に使用し得る。そして、内燃機関の中でも、特に、ターボタージャーを備え、水素を燃料として作動する内燃機関(水素燃料エンジン)における各部品間の潤滑により好適に使用し得る。ターボタージャーを備える水素燃料エンジンは、燃料が水素であるため燃焼室内が非常に高温となり、潤滑油組成物がミスト化し易い環境にある。ミスト化した潤滑油組成物は、排気通路側に設置されたターボチャージャーのタービンホイールに排出されるが、タービンホイールに粘着してコーキング発生の要因となる。これに対して、本発明の一態様の潤滑油組成物は、高温環境下での耐ミスト性に優れているため、ターボタージャーを備える水素燃料エンジンに用いても、タービンホイールに粘着する潤滑油組成物の量を抑制し、コーキングの発生を効果的に抑制することができる。 [Applications of lubricating oil composition]
The lubricating oil composition of one embodiment of the present invention has excellent mist resistance in a high-temperature environment and is highly effective in suppressing coking.
Therefore, the lubricating oil composition of one embodiment of the present invention can be applied to various devices that can exhibit the above characteristics, and can be suitably used for lubrication between various parts in an internal combustion engine. Among internal combustion engines, the present invention can be particularly suitably used for lubricating various parts in an internal combustion engine (hydrogen fuel engine) that is equipped with a turbotarger and operates using hydrogen as fuel. In a hydrogen fuel engine equipped with a turbotarger, since the fuel is hydrogen, the temperature inside the combustion chamber is extremely high, and the lubricating oil composition is in an environment where it is easy to turn into mist. The misted lubricating oil composition is discharged to the turbine wheel of the turbocharger installed on the exhaust passage side, but it sticks to the turbine wheel and causes coking. In contrast, the lubricating oil composition of one embodiment of the present invention has excellent mist resistance in high-temperature environments, so even when used in a hydrogen fuel engine equipped with a turbotarger, the lubricating oil composition adheres to the turbine wheel. By suppressing the amount of oil composition, it is possible to effectively suppress the occurrence of coking.
また、本発明の別の一態様の潤滑油組成物は、上記特性を有すると共に、さらに耐乳化性に優れている。そのため、当該潤滑油組成物は、水の混入による潤滑油組成物の増粘を防ぎ、使用する機器のトラブルを防止することができる。当該態様の潤滑油組成物は、上記特性を発揮し得る各種装置に適用することができるが、水素を燃料として作動する内燃機関(水素燃料エンジン)における各部品間の潤滑により好適に使用し得る。水素燃料エンジンは、水素を燃料とするために潤滑油組成物中に水が混入し易い。この水の混入によって潤滑油組成物が乳化してしまう場合がある。水素燃料エンジンは発生した水を車両外部へ排出する必要があるが、乳化してしまうと排出が困難となる。また、乳化してしまうことにより、潤滑油組成物の増粘を引き起こし、エンジン機器の不良の原因ともなる。これに対して、本発明の一態様の潤滑油組成物は、優れた耐乳化性を発現し、水の混入による増粘を抑制し得るため、水素燃料エンジンのトラブルを未然に防止することができる。 当該態様の潤滑油組成物についても、水素燃料エンジンの中でも、ターボチャージャーを備える水素燃料エンジンの潤滑にも好適に使用し得る。
Furthermore, a lubricating oil composition according to another embodiment of the present invention has the above characteristics and further has excellent emulsification resistance. Therefore, the lubricating oil composition can prevent thickening of the lubricating oil composition due to water contamination, and can prevent troubles in the equipment used. The lubricating oil composition of this embodiment can be applied to various devices capable of exhibiting the above characteristics, but can be more preferably used for lubrication between parts in an internal combustion engine (hydrogen fuel engine) that operates using hydrogen as fuel. . Since hydrogen-fueled engines use hydrogen as fuel, water is likely to be mixed into the lubricating oil composition. This water contamination may cause the lubricating oil composition to become emulsified. Hydrogen fuel engines need to discharge generated water to the outside of the vehicle, but if it becomes emulsified, it becomes difficult to discharge it. Further, emulsification causes thickening of the lubricating oil composition, which may cause malfunction of engine equipment. In contrast, the lubricating oil composition of one embodiment of the present invention exhibits excellent emulsification resistance and can suppress thickening due to water contamination, so it is possible to prevent troubles in hydrogen fuel engines. can. The lubricating oil composition of this embodiment can also be suitably used for lubrication of a hydrogen fuel engine equipped with a turbocharger, among hydrogen fuel engines.
また、本発明の一態様の潤滑油組成物の上述の特性を考慮すると、本発明は、以下の[I]も提供し得る。
[I]上述の本発明の一態様の潤滑油組成物を内燃機関の潤滑に適用する、内燃機関の潤滑方法。
上記[I]に記載の内燃機関としては、例えば、水素燃料エンジンが挙げられ、より具体的にはターボタージャーを備える水素燃料エンジンが挙げられる。特に、ターボタージャーの排気通路側に設置されたタービンホイールを備えた水素燃料エンジンにおいて、コーキングの発生を効果的に抑制することができる。さらに、本発明の別の一態様においては、潤滑油組成物中に水が混入による機器のトラブルを未然に防止することができる。 Furthermore, in consideration of the above-mentioned properties of the lubricating oil composition of one embodiment of the present invention, the present invention can also provide the following [I].
[I] A method for lubricating an internal combustion engine, in which the lubricating oil composition of one embodiment of the present invention described above is applied to lubricating the engine.
Examples of the internal combustion engine described in [I] above include a hydrogen fuel engine, and more specifically a hydrogen fuel engine equipped with a turbotarger. Particularly in a hydrogen fuel engine equipped with a turbine wheel installed on the exhaust passage side of a turbotarger, the occurrence of coking can be effectively suppressed. Furthermore, in another aspect of the present invention, it is possible to prevent equipment troubles due to water being mixed into the lubricating oil composition.
[I]上述の本発明の一態様の潤滑油組成物を内燃機関の潤滑に適用する、内燃機関の潤滑方法。
上記[I]に記載の内燃機関としては、例えば、水素燃料エンジンが挙げられ、より具体的にはターボタージャーを備える水素燃料エンジンが挙げられる。特に、ターボタージャーの排気通路側に設置されたタービンホイールを備えた水素燃料エンジンにおいて、コーキングの発生を効果的に抑制することができる。さらに、本発明の別の一態様においては、潤滑油組成物中に水が混入による機器のトラブルを未然に防止することができる。 Furthermore, in consideration of the above-mentioned properties of the lubricating oil composition of one embodiment of the present invention, the present invention can also provide the following [I].
[I] A method for lubricating an internal combustion engine, in which the lubricating oil composition of one embodiment of the present invention described above is applied to lubricating the engine.
Examples of the internal combustion engine described in [I] above include a hydrogen fuel engine, and more specifically a hydrogen fuel engine equipped with a turbotarger. Particularly in a hydrogen fuel engine equipped with a turbine wheel installed on the exhaust passage side of a turbotarger, the occurrence of coking can be effectively suppressed. Furthermore, in another aspect of the present invention, it is possible to prevent equipment troubles due to water being mixed into the lubricating oil composition.
以上のとおり、本発明は、以下の態様を開示する。
[1]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)を含有し、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
潤滑油組成物。
[2]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)と、
少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)と、を含有し、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]が、0~0.40であり、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]が、0~0.02であり、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
水素を燃料として作動する内燃機関に用いられる、潤滑油組成物。
[3]さらに粘度指数向上剤(C)を含有し、
粘度指数向上剤(C)の樹脂分換算での含有量が、前記潤滑油組成物の全量基準で、0.40質量%以下である、上記[1]又は[2]に記載の潤滑油組成物。
[4]ターボタージャーを備え、水素を燃料として作動する内燃機関に用いられる、上記[1]~[3]のいずれか一項に記載の潤滑油組成物。
[5]上記[1]~[4]のいずれか一項に記載の潤滑油組成物を、内燃機関の潤滑に適用する、内燃機関の潤滑方法。
[6]前記内燃機関が、ターボタージャーを備え、水素を燃料として作動する内燃機関である、上記[5]に記載の内燃機関の潤滑方法。 As described above, the present invention discloses the following aspects.
[1] Contains a base oil (A) with a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250 ° C. for 1 hour in accordance with ASTM D5800,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
Lubricating oil composition.
[2] A base oil (A) having a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250°C for 1 hour in accordance with ASTM D5800;
Calcium-based detergent (B) that contains at least calcium salicylate (B1) and may optionally contain one or more selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). and,
The ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40,
The ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ~0.02,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
A lubricating oil composition used in internal combustion engines that run on hydrogen.
[3] Further contains a viscosity index improver (C),
The lubricating oil composition according to [1] or [2] above, wherein the content of the viscosity index improver (C) in terms of resin content is 0.40% by mass or less based on the total amount of the lubricating oil composition. thing.
[4] The lubricating oil composition according to any one of [1] to [3] above, which is used in an internal combustion engine that is equipped with a turbotarger and operates using hydrogen as fuel.
[5] A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to any one of [1] to [4] above to lubricate an internal combustion engine.
[6] The method for lubricating an internal combustion engine according to [5] above, wherein the internal combustion engine is equipped with a turbotarger and operates using hydrogen as fuel.
[1]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)を含有し、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
潤滑油組成物。
[2]ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)と、
少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)と、を含有し、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]が、0~0.40であり、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]が、0~0.02であり、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
水素を燃料として作動する内燃機関に用いられる、潤滑油組成物。
[3]さらに粘度指数向上剤(C)を含有し、
粘度指数向上剤(C)の樹脂分換算での含有量が、前記潤滑油組成物の全量基準で、0.40質量%以下である、上記[1]又は[2]に記載の潤滑油組成物。
[4]ターボタージャーを備え、水素を燃料として作動する内燃機関に用いられる、上記[1]~[3]のいずれか一項に記載の潤滑油組成物。
[5]上記[1]~[4]のいずれか一項に記載の潤滑油組成物を、内燃機関の潤滑に適用する、内燃機関の潤滑方法。
[6]前記内燃機関が、ターボタージャーを備え、水素を燃料として作動する内燃機関である、上記[5]に記載の内燃機関の潤滑方法。 As described above, the present invention discloses the following aspects.
[1] Contains a base oil (A) with a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250 ° C. for 1 hour in accordance with ASTM D5800,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
Lubricating oil composition.
[2] A base oil (A) having a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250°C for 1 hour in accordance with ASTM D5800;
Calcium-based detergent (B) that contains at least calcium salicylate (B1) and may optionally contain one or more selected from neutral calcium sulfonate (B2) with a base value of 70 mgKOH/g or less and calcium phenate (B3). and,
The ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40,
The ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ~0.02,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
A lubricating oil composition used in internal combustion engines that run on hydrogen.
[3] Further contains a viscosity index improver (C),
The lubricating oil composition according to [1] or [2] above, wherein the content of the viscosity index improver (C) in terms of resin content is 0.40% by mass or less based on the total amount of the lubricating oil composition. thing.
[4] The lubricating oil composition according to any one of [1] to [3] above, which is used in an internal combustion engine that is equipped with a turbotarger and operates using hydrogen as fuel.
[5] A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to any one of [1] to [4] above to lubricate an internal combustion engine.
[6] The method for lubricating an internal combustion engine according to [5] above, wherein the internal combustion engine is equipped with a turbotarger and operates using hydrogen as fuel.
次に、本発明を実施例により更に詳細に説明するが、本発明はこれらの例によって何ら限定されるものではない。なお、各種物性の測定法は、下記のとおりである。
Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to these examples in any way. The methods for measuring various physical properties are as follows.
(1)動粘度
ASTM D445に準拠して測定した。
(2)40℃及び100℃における粘度指数
ASTM D2270に準拠して算出した。
(3)NOACK値
ASTM D5800に準拠して、250℃、1時間で測定した。
(4)CCS粘度(-25℃)
ASTM D5293に準拠して、-25℃で測定した。
(5)HTHS粘度(150℃)
ASTM D4683に準拠して、150℃で測定した。
(6)カルシウム原子(Ca)の含有量
ASTM D5185に準拠して測定した。
(7)塩基価(過塩素酸法)
ASTM D2896に準拠して過塩素酸法にて測定した。 (1) Kinematic viscosity Measured in accordance with ASTM D445.
(2) Viscosity index at 40°C and 100°C Calculated according to ASTM D2270.
(3) NOACK value Measured at 250° C. for 1 hour in accordance with ASTM D5800.
(4) CCS viscosity (-25℃)
Measured at -25°C according to ASTM D5293.
(5) HTHS viscosity (150°C)
Measured at 150°C according to ASTM D4683.
(6) Content of calcium atoms (Ca) Measured in accordance with ASTM D5185.
(7) Base number (perchloric acid method)
It was measured by the perchloric acid method in accordance with ASTM D2896.
ASTM D445に準拠して測定した。
(2)40℃及び100℃における粘度指数
ASTM D2270に準拠して算出した。
(3)NOACK値
ASTM D5800に準拠して、250℃、1時間で測定した。
(4)CCS粘度(-25℃)
ASTM D5293に準拠して、-25℃で測定した。
(5)HTHS粘度(150℃)
ASTM D4683に準拠して、150℃で測定した。
(6)カルシウム原子(Ca)の含有量
ASTM D5185に準拠して測定した。
(7)塩基価(過塩素酸法)
ASTM D2896に準拠して過塩素酸法にて測定した。 (1) Kinematic viscosity Measured in accordance with ASTM D445.
(2) Viscosity index at 40°C and 100°C Calculated according to ASTM D2270.
(3) NOACK value Measured at 250° C. for 1 hour in accordance with ASTM D5800.
(4) CCS viscosity (-25℃)
Measured at -25°C according to ASTM D5293.
(5) HTHS viscosity (150°C)
Measured at 150°C according to ASTM D4683.
(6) Content of calcium atoms (Ca) Measured in accordance with ASTM D5185.
(7) Base number (perchloric acid method)
It was measured by the perchloric acid method in accordance with ASTM D2896.
実施例1a~6a、比較例1a~2a
以下の実施例1a~6a及び比較例1a~2aで用いた基油及び各種添加剤は以下のとおりである。
<基油(A)>
実施例及び比較例で用いた基油(a1-1)~(a1-5)及び基油(a2-1)~(a2-5)のAPI(米国石油協会)基油カテゴリーの分類及び性状を表1に示す。
Examples 1a to 6a, Comparative Examples 1a to 2a
The base oils and various additives used in Examples 1a to 6a and Comparative Examples 1a to 2a below are as follows.
<Base oil (A)>
The API (American Petroleum Institute) base oil category classification and properties of base oils (a1-1) to (a1-5) and base oils (a2-1) to (a2-5) used in Examples and Comparative Examples are shown below. It is shown in Table 1.
以下の実施例1a~6a及び比較例1a~2aで用いた基油及び各種添加剤は以下のとおりである。
<基油(A)>
実施例及び比較例で用いた基油(a1-1)~(a1-5)及び基油(a2-1)~(a2-5)のAPI(米国石油協会)基油カテゴリーの分類及び性状を表1に示す。
The base oils and various additives used in Examples 1a to 6a and Comparative Examples 1a to 2a below are as follows.
<Base oil (A)>
The API (American Petroleum Institute) base oil category classification and properties of base oils (a1-1) to (a1-5) and base oils (a2-1) to (a2-5) used in Examples and Comparative Examples are shown below. It is shown in Table 1.
<各種添加剤>
・粘度指数向上剤(1):水素化スチレン-ジエンコポリマーをAPI基油カテゴリーのグループIIIに分類される希釈油で希釈した溶液、樹脂分濃度=6.5質量%。
・粘度指数向上剤(2):水素化スチレン-ジエンコポリマーをAPI基油カテゴリーのグループIに分類される希釈油で希釈した溶液、樹脂分濃度=10.7質量%。
・流動点降下剤:ポリメタクリレート(VISCOPLEX 1-500(EVONIK社製))
・添加剤混合物:酸化防止剤、金属系清浄剤、分散剤、耐摩耗剤、及び消泡剤を含むJASO DH-2 添加剤パッケージ。 <Various additives>
- Viscosity index improver (1): A solution prepared by diluting a hydrogenated styrene-diene copolymer with a diluent oil classified into Group III of the API base oil category, resin concentration = 6.5% by mass.
- Viscosity index improver (2): A solution prepared by diluting a hydrogenated styrene-diene copolymer with a diluent oil classified into Group I of the API base oil category, resin concentration = 10.7% by mass.
・Pour point depressant: Polymethacrylate (VISCOPLEX 1-500 (manufactured by EVONIK))
- Additive mixture: JASO DH-2 additive package containing antioxidants, metal detergents, dispersants, antiwear agents, and antifoam agents.
・粘度指数向上剤(1):水素化スチレン-ジエンコポリマーをAPI基油カテゴリーのグループIIIに分類される希釈油で希釈した溶液、樹脂分濃度=6.5質量%。
・粘度指数向上剤(2):水素化スチレン-ジエンコポリマーをAPI基油カテゴリーのグループIに分類される希釈油で希釈した溶液、樹脂分濃度=10.7質量%。
・流動点降下剤:ポリメタクリレート(VISCOPLEX 1-500(EVONIK社製))
・添加剤混合物:酸化防止剤、金属系清浄剤、分散剤、耐摩耗剤、及び消泡剤を含むJASO DH-2 添加剤パッケージ。 <Various additives>
- Viscosity index improver (1): A solution prepared by diluting a hydrogenated styrene-diene copolymer with a diluent oil classified into Group III of the API base oil category, resin concentration = 6.5% by mass.
- Viscosity index improver (2): A solution prepared by diluting a hydrogenated styrene-diene copolymer with a diluent oil classified into Group I of the API base oil category, resin concentration = 10.7% by mass.
・Pour point depressant: Polymethacrylate (VISCOPLEX 1-500 (manufactured by EVONIK))
- Additive mixture: JASO DH-2 additive package containing antioxidants, metal detergents, dispersants, antiwear agents, and antifoam agents.
上述の基油及び各種添加剤を、表2に示す配合量にて添加し、十分に混合して潤滑油組成物をそれぞれ調製した。使用した基油(混合基油)の性状、及び、調製した潤滑油組成物の性状を表2に示す。
また、調製した潤滑油組成物を用いて以下の試験を行った。これらの結果も表2に示す。 The above-mentioned base oil and various additives were added in the amounts shown in Table 2 and thoroughly mixed to prepare lubricating oil compositions. Table 2 shows the properties of the base oil (mixed base oil) used and the properties of the lubricating oil composition prepared.
Further, the following tests were conducted using the prepared lubricating oil composition. These results are also shown in Table 2.
また、調製した潤滑油組成物を用いて以下の試験を行った。これらの結果も表2に示す。 The above-mentioned base oil and various additives were added in the amounts shown in Table 2 and thoroughly mixed to prepare lubricating oil compositions. Table 2 shows the properties of the base oil (mixed base oil) used and the properties of the lubricating oil composition prepared.
Further, the following tests were conducted using the prepared lubricating oil composition. These results are also shown in Table 2.
(1)耐ミスト性試験
下記測定条件にて、調製した潤滑油組成物である各試料油と圧縮空気とを混合してミスト化し、浮遊ミスト化した油量(ミスト化質量、単位:g)を測定した。
(測定条件)
・試験装置:TACOミスト測定装置(型式番号:C3-0807)
・空気圧力:0.2MPa
・試料油量:40g
そして、下記式(i)より、ミスト化率を測定した。
・式(i):ミスト化率(質量%)=[ミスト化質量(g)/試料油の質量(=40g)]×100
上記ミスト化率が低いほど、浮遊ミストが少なく耐ミスト性に優れていることを意味し、コーキング発生が抑制された潤滑油組成物であるといえる。本実施例においては、当該ミスト化率が0.90質量%以下である場合、耐ミスト性が良好な潤滑油組成物であると判断した。 (1) Mist resistance test Under the following measurement conditions, each sample oil, which is a lubricating oil composition prepared, was mixed with compressed air and made into a mist, and the amount of oil made into a floating mist (mass of mist, unit: g) was measured.
(Measurement condition)
・Test device: TACO mist measuring device (model number: C3-0807)
・Air pressure: 0.2MPa
・Sample oil amount: 40g
Then, the mist formation rate was measured using the following formula (i).
・Formula (i): Mist conversion rate (mass%) = [Mist conversion mass (g)/mass of sample oil (=40g)] x 100
The lower the mist formation rate, the less floating mist and the better the mist resistance, and it can be said that the lubricating oil composition has suppressed the occurrence of coking. In this example, when the mist conversion rate was 0.90% by mass or less, it was determined that the lubricating oil composition had good mist resistance.
下記測定条件にて、調製した潤滑油組成物である各試料油と圧縮空気とを混合してミスト化し、浮遊ミスト化した油量(ミスト化質量、単位:g)を測定した。
(測定条件)
・試験装置:TACOミスト測定装置(型式番号:C3-0807)
・空気圧力:0.2MPa
・試料油量:40g
そして、下記式(i)より、ミスト化率を測定した。
・式(i):ミスト化率(質量%)=[ミスト化質量(g)/試料油の質量(=40g)]×100
上記ミスト化率が低いほど、浮遊ミストが少なく耐ミスト性に優れていることを意味し、コーキング発生が抑制された潤滑油組成物であるといえる。本実施例においては、当該ミスト化率が0.90質量%以下である場合、耐ミスト性が良好な潤滑油組成物であると判断した。 (1) Mist resistance test Under the following measurement conditions, each sample oil, which is a lubricating oil composition prepared, was mixed with compressed air and made into a mist, and the amount of oil made into a floating mist (mass of mist, unit: g) was measured.
(Measurement condition)
・Test device: TACO mist measuring device (model number: C3-0807)
・Air pressure: 0.2MPa
・Sample oil amount: 40g
Then, the mist formation rate was measured using the following formula (i).
・Formula (i): Mist conversion rate (mass%) = [Mist conversion mass (g)/mass of sample oil (=40g)] x 100
The lower the mist formation rate, the less floating mist and the better the mist resistance, and it can be said that the lubricating oil composition has suppressed the occurrence of coking. In this example, when the mist conversion rate was 0.90% by mass or less, it was determined that the lubricating oil composition had good mist resistance.
(2)パネルコーキング試験
Fed.TestMethodStd.791-3462に準拠して測定した。
具体的には、スプラッシャーを備えた試験容器に試料油300mLを入れ、アルミ製パネルを上部に取り付け、試料油を90℃、パネルを300℃に加熱し、スプラッシャーを回転させ連続してパネルに油を跳ねかけて、24時間の試験を行った。試験終了後に、パネルに付着したコーキング物の付着量を秤量(単位:mg)した。
当該付着量が少ないほど、耐コーキング性に優れた潤滑油組成物であるといえる。本実施例においては、当該付着量が150mg以下である場合、耐コーキング性が良好な潤滑油組成物であると判断した。 (2) Panel caulking test Measured in accordance with Fed.TestMethodStd.791-3462.
Specifically, 300 mL of sample oil is placed in a test container equipped with a splasher, an aluminum panel is attached to the top, the sample oil is heated to 90°C and the panel is heated to 300°C, and the splasher is rotated to continuously spray oil onto the panel. A 24-hour test was conducted by splashing water on the surface. After the test was completed, the amount of caulking material adhering to the panel was weighed (unit: mg).
It can be said that the smaller the amount of adhesion, the more excellent the lubricating oil composition is in coking resistance. In this example, when the amount of adhesion was 150 mg or less, it was determined that the lubricating oil composition had good coking resistance.
Fed.TestMethodStd.791-3462に準拠して測定した。
具体的には、スプラッシャーを備えた試験容器に試料油300mLを入れ、アルミ製パネルを上部に取り付け、試料油を90℃、パネルを300℃に加熱し、スプラッシャーを回転させ連続してパネルに油を跳ねかけて、24時間の試験を行った。試験終了後に、パネルに付着したコーキング物の付着量を秤量(単位:mg)した。
当該付着量が少ないほど、耐コーキング性に優れた潤滑油組成物であるといえる。本実施例においては、当該付着量が150mg以下である場合、耐コーキング性が良好な潤滑油組成物であると判断した。 (2) Panel caulking test Measured in accordance with Fed.TestMethodStd.791-3462.
Specifically, 300 mL of sample oil is placed in a test container equipped with a splasher, an aluminum panel is attached to the top, the sample oil is heated to 90°C and the panel is heated to 300°C, and the splasher is rotated to continuously spray oil onto the panel. A 24-hour test was conducted by splashing water on the surface. After the test was completed, the amount of caulking material adhering to the panel was weighed (unit: mg).
It can be said that the smaller the amount of adhesion, the more excellent the lubricating oil composition is in coking resistance. In this example, when the amount of adhesion was 150 mg or less, it was determined that the lubricating oil composition had good coking resistance.
表2より、実施例1a~6aで調製した潤滑油組成物は、比較例1a~2aの潤滑油組成物に比べて、耐ミスト性が優れており、コーキングの発生が効果的に抑制された結果となった。
From Table 2, the lubricating oil compositions prepared in Examples 1a to 6a had superior mist resistance and the occurrence of coking was effectively suppressed compared to the lubricating oil compositions of Comparative Examples 1a to 2a. This was the result.
実施例1b~8b、参考例1b~8b
表3又は表4に示す成分を、同表の配合量にて添加し、十分に混合して潤滑油組成物をそれぞれ調製した。実施例及び比較例で用いた基油及び各種添加剤は以下のとおりである。
<基油>
・「基油」:API基油カテゴリーのグループIIIに分類される鉱油、40℃動粘度=41.58mm2/s、100℃動粘度=7.307mm2/s、粘度指数=141、NOACK値=2.9質量%。
<各種添加剤>
・「過塩基性Caサリシレート(1)」:塩基価(過塩素酸法)=170mgKOH/gのカルシウムサリシレート、Ca含有量=6.1質量%。
・「過塩基性Caサリシレート(2)」:塩基価(過塩素酸法)=225mgKOH/gのカルシウムサリシレート、Ca含有量=8.0質量%。
・「過塩基性Caサリシレート(3)」:塩基価(過塩素酸法)=350mgKOH/gのカルシウムサリシレート、Ca含有量=12.1質量%。
・「中性Caサリシレート」:塩基価(過塩素酸法)=64mgKOH/gのカルシウムサリシレート、Ca含有量=2.3質量%。
・「過塩基性Caスルホネート(1)」:塩基価(過塩素酸法)=307mgKOH/gのカルシウムスルホネート、Ca含有量=11.9質量%。
・「過塩基性Caスルホネート(2)」:塩基価(過塩素酸法)=300mgKOH/gのカルシウムスルホネート、Ca含有量=11.6質量%。
・「過塩基性Caスルホネート(3)」:塩基価(過塩素酸法)=425mgKOH/gのカルシウムスルホネート、Ca含有量=16.0質量%。
・「中性Caスルホネート」:塩基価(過塩素酸法)=19mgKOH/gのカルシウムスルホネート、Ca含有量=2.4質量%。
・「過塩基性Caフェネート」:塩基価(過塩素酸法)=250mgKOH/gのカルシウムフェネート、Ca含有量=9.3質量%。
・「粘度指数向上剤」:水素化スチレン-ジエンコポリマーをAPI基油カテゴリーのグループIに分類される希釈油で希釈した溶液、樹脂分濃度=10.7質量%。
・「流動点降下剤」:ポリメタクリレート(VISCOPLEX 1-500(EVONIK社製))
・添加剤混合物:酸化防止剤、無灰分散剤、耐摩耗剤、及び消泡剤を含むJASO DH-2 添加剤パッケージ。 Examples 1b to 8b, Reference examples 1b to 8b
The components shown in Table 3 or Table 4 were added in the amounts shown in the table and mixed thoroughly to prepare lubricating oil compositions. The base oils and various additives used in Examples and Comparative Examples are as follows.
<Base oil>
・"Base oil": Mineral oil classified into Group III of API base oil category, 40°C kinematic viscosity = 41.58 mm 2 /s, 100°C kinematic viscosity = 7.307 mm 2 /s, viscosity index = 141, NOACK value =2.9% by mass.
<Various additives>
- "Overbased Ca salicylate (1)": Calcium salicylate with base value (perchloric acid method) = 170 mgKOH/g, Ca content = 6.1% by mass.
- "Overbased Ca salicylate (2)": Calcium salicylate with base value (perchloric acid method) = 225 mgKOH/g, Ca content = 8.0% by mass.
- "Overbased Ca salicylate (3)": Calcium salicylate with base number (perchloric acid method) = 350 mgKOH/g, Ca content = 12.1% by mass.
- "Neutral Ca salicylate": Calcium salicylate with base number (perchloric acid method) = 64 mgKOH/g, Ca content = 2.3% by mass.
- "Overbased Ca sulfonate (1)": Calcium sulfonate with base value (perchloric acid method) = 307 mgKOH/g, Ca content = 11.9% by mass.
- "Overbased Ca sulfonate (2)": Calcium sulfonate with base number (perchloric acid method) = 300 mgKOH/g, Ca content = 11.6% by mass.
- "Overbased Ca sulfonate (3)": Calcium sulfonate with base value (perchloric acid method) = 425 mgKOH/g, Ca content = 16.0% by mass.
- "Neutral Ca sulfonate": Calcium sulfonate with base number (perchloric acid method) = 19 mgKOH/g, Ca content = 2.4% by mass.
- "Overbased Ca phenate": Calcium phenate with base number (perchloric acid method) = 250 mgKOH/g, Ca content = 9.3% by mass.
- "Viscosity index improver": A solution prepared by diluting a hydrogenated styrene-diene copolymer with a diluent oil classified into Group I of the API base oil category, resin concentration = 10.7% by mass.
・“Pour point depressant”: Polymethacrylate (VISCOPLEX 1-500 (manufactured by EVONIK))
- Additive mixture: JASO DH-2 additive package containing antioxidants, ashless dispersants, anti-wear agents, and defoamers.
表3又は表4に示す成分を、同表の配合量にて添加し、十分に混合して潤滑油組成物をそれぞれ調製した。実施例及び比較例で用いた基油及び各種添加剤は以下のとおりである。
<基油>
・「基油」:API基油カテゴリーのグループIIIに分類される鉱油、40℃動粘度=41.58mm2/s、100℃動粘度=7.307mm2/s、粘度指数=141、NOACK値=2.9質量%。
<各種添加剤>
・「過塩基性Caサリシレート(1)」:塩基価(過塩素酸法)=170mgKOH/gのカルシウムサリシレート、Ca含有量=6.1質量%。
・「過塩基性Caサリシレート(2)」:塩基価(過塩素酸法)=225mgKOH/gのカルシウムサリシレート、Ca含有量=8.0質量%。
・「過塩基性Caサリシレート(3)」:塩基価(過塩素酸法)=350mgKOH/gのカルシウムサリシレート、Ca含有量=12.1質量%。
・「中性Caサリシレート」:塩基価(過塩素酸法)=64mgKOH/gのカルシウムサリシレート、Ca含有量=2.3質量%。
・「過塩基性Caスルホネート(1)」:塩基価(過塩素酸法)=307mgKOH/gのカルシウムスルホネート、Ca含有量=11.9質量%。
・「過塩基性Caスルホネート(2)」:塩基価(過塩素酸法)=300mgKOH/gのカルシウムスルホネート、Ca含有量=11.6質量%。
・「過塩基性Caスルホネート(3)」:塩基価(過塩素酸法)=425mgKOH/gのカルシウムスルホネート、Ca含有量=16.0質量%。
・「中性Caスルホネート」:塩基価(過塩素酸法)=19mgKOH/gのカルシウムスルホネート、Ca含有量=2.4質量%。
・「過塩基性Caフェネート」:塩基価(過塩素酸法)=250mgKOH/gのカルシウムフェネート、Ca含有量=9.3質量%。
・「粘度指数向上剤」:水素化スチレン-ジエンコポリマーをAPI基油カテゴリーのグループIに分類される希釈油で希釈した溶液、樹脂分濃度=10.7質量%。
・「流動点降下剤」:ポリメタクリレート(VISCOPLEX 1-500(EVONIK社製))
・添加剤混合物:酸化防止剤、無灰分散剤、耐摩耗剤、及び消泡剤を含むJASO DH-2 添加剤パッケージ。 Examples 1b to 8b, Reference examples 1b to 8b
The components shown in Table 3 or Table 4 were added in the amounts shown in the table and mixed thoroughly to prepare lubricating oil compositions. The base oils and various additives used in Examples and Comparative Examples are as follows.
<Base oil>
・"Base oil": Mineral oil classified into Group III of API base oil category, 40°C kinematic viscosity = 41.58 mm 2 /s, 100°C kinematic viscosity = 7.307 mm 2 /s, viscosity index = 141, NOACK value =2.9% by mass.
<Various additives>
- "Overbased Ca salicylate (1)": Calcium salicylate with base value (perchloric acid method) = 170 mgKOH/g, Ca content = 6.1% by mass.
- "Overbased Ca salicylate (2)": Calcium salicylate with base value (perchloric acid method) = 225 mgKOH/g, Ca content = 8.0% by mass.
- "Overbased Ca salicylate (3)": Calcium salicylate with base number (perchloric acid method) = 350 mgKOH/g, Ca content = 12.1% by mass.
- "Neutral Ca salicylate": Calcium salicylate with base number (perchloric acid method) = 64 mgKOH/g, Ca content = 2.3% by mass.
- "Overbased Ca sulfonate (1)": Calcium sulfonate with base value (perchloric acid method) = 307 mgKOH/g, Ca content = 11.9% by mass.
- "Overbased Ca sulfonate (2)": Calcium sulfonate with base number (perchloric acid method) = 300 mgKOH/g, Ca content = 11.6% by mass.
- "Overbased Ca sulfonate (3)": Calcium sulfonate with base value (perchloric acid method) = 425 mgKOH/g, Ca content = 16.0% by mass.
- "Neutral Ca sulfonate": Calcium sulfonate with base number (perchloric acid method) = 19 mgKOH/g, Ca content = 2.4% by mass.
- "Overbased Ca phenate": Calcium phenate with base number (perchloric acid method) = 250 mgKOH/g, Ca content = 9.3% by mass.
- "Viscosity index improver": A solution prepared by diluting a hydrogenated styrene-diene copolymer with a diluent oil classified into Group I of the API base oil category, resin concentration = 10.7% by mass.
・“Pour point depressant”: Polymethacrylate (VISCOPLEX 1-500 (manufactured by EVONIK))
- Additive mixture: JASO DH-2 additive package containing antioxidants, ashless dispersants, anti-wear agents, and defoamers.
調製した潤滑油組成物について、以下の加水分解安定性試験を行った。当該試験の結果を表3及び4に示す。
[加水分解安定性試験]
調製した潤滑油組成物を試料として、ASTM D 2619「Standard Test Method for Hydrolytic Stability of Hydraulic Fluids(Beverage Bottle Method)」の試験法に準拠し、試料75mLを入れた容器に銅触媒、蒸留水25mLを入れ、93℃まで昇温して、容器を回転させながら48時間保持した。その後、室温(25℃)まで冷却し、容器内の液体をメスシリンダーに移して24時間静置した。静置後の、油層、水層、及びエマルション層の全量を100体積%とし、各層の体積割合を測定した。
エマルション層の体積割合が小さいほど、耐乳化性に優れた潤滑油組成物といえる。なお、本実施例においては、エマルション層の体積割合が30体積%以下であれば、耐乳化性が良好な潤滑油組成物であると判断した。 The following hydrolysis stability test was conducted on the prepared lubricating oil composition. The results of the test are shown in Tables 3 and 4.
[Hydrolysis stability test]
Using the prepared lubricating oil composition as a sample, a copper catalyst and 25 mL of distilled water were added to a container containing 75 mL of sample according to the test method of ASTM D 2619 "Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)". The temperature was raised to 93° C. and maintained for 48 hours while rotating the container. Thereafter, it was cooled to room temperature (25° C.), and the liquid in the container was transferred to a measuring cylinder and left standing for 24 hours. The total amount of the oil layer, water layer, and emulsion layer after standing was set to 100% by volume, and the volume ratio of each layer was measured.
It can be said that the smaller the volume ratio of the emulsion layer, the better the emulsion resistance of the lubricating oil composition. In this example, it was determined that the lubricating oil composition had good emulsification resistance if the volume ratio of the emulsion layer was 30% by volume or less.
[加水分解安定性試験]
調製した潤滑油組成物を試料として、ASTM D 2619「Standard Test Method for Hydrolytic Stability of Hydraulic Fluids(Beverage Bottle Method)」の試験法に準拠し、試料75mLを入れた容器に銅触媒、蒸留水25mLを入れ、93℃まで昇温して、容器を回転させながら48時間保持した。その後、室温(25℃)まで冷却し、容器内の液体をメスシリンダーに移して24時間静置した。静置後の、油層、水層、及びエマルション層の全量を100体積%とし、各層の体積割合を測定した。
エマルション層の体積割合が小さいほど、耐乳化性に優れた潤滑油組成物といえる。なお、本実施例においては、エマルション層の体積割合が30体積%以下であれば、耐乳化性が良好な潤滑油組成物であると判断した。 The following hydrolysis stability test was conducted on the prepared lubricating oil composition. The results of the test are shown in Tables 3 and 4.
[Hydrolysis stability test]
Using the prepared lubricating oil composition as a sample, a copper catalyst and 25 mL of distilled water were added to a container containing 75 mL of sample according to the test method of ASTM D 2619 "Standard Test Method for Hydrolytic Stability of Hydraulic Fluids (Beverage Bottle Method)". The temperature was raised to 93° C. and maintained for 48 hours while rotating the container. Thereafter, it was cooled to room temperature (25° C.), and the liquid in the container was transferred to a measuring cylinder and left standing for 24 hours. The total amount of the oil layer, water layer, and emulsion layer after standing was set to 100% by volume, and the volume ratio of each layer was measured.
It can be said that the smaller the volume ratio of the emulsion layer, the better the emulsion resistance of the lubricating oil composition. In this example, it was determined that the lubricating oil composition had good emulsification resistance if the volume ratio of the emulsion layer was 30% by volume or less.
表1より、実施例1b~8bで調製した潤滑油組成物は、加水分解安定性試験におけるエマルション層の体積割合が低く、耐乳化性に優れた結果となった。
From Table 1, the lubricating oil compositions prepared in Examples 1b to 8b had a low volume ratio of the emulsion layer in the hydrolysis stability test, resulting in excellent emulsification resistance.
Claims (6)
- ASTM D5800に準拠して、250℃、1時間の条件にて行ったNOACK試験により測定されるNOACK値が6質量%以下の基油(A)を含有し、
-25℃におけるCCS粘度が7000mPa・s以下であり、
150℃におけるHTHS粘度が2.9mPa・s以上である、
潤滑油組成物。 Contains a base oil (A) with a NOACK value of 6% by mass or less as measured by a NOACK test conducted at 250 ° C. for 1 hour in accordance with ASTM D5800,
CCS viscosity at -25°C is 7000 mPa・s or less,
The HTHS viscosity at 150°C is 2.9 mPa・s or more,
Lubricating oil composition. - さらに、少なくともカルシウムサリシレート(B1)を含み、任意で、塩基価70mgKOH/g以下の中性カルシウムスルホネート(B2)及びカルシウムフェネート(B3)から選ばれる1種以上を含み得る、カルシウム系清浄剤(B)と、を含有し、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、中性カルシウムスルホネート(B2)のカルシウム原子換算の含有量(b2)の比率[(b2)/(b)]が、0~0.40であり、
カルシウム系清浄剤(B)のカルシウム原子換算での含有量(b)に対する、カルシウムフェネート(B3)のカルシウム原子換算の含有量(b3)の比率[(b3)/(b)]が、0~0.02であり、
水素を燃料として作動する内燃機関に用いられる、請求項1に記載の潤滑油組成物。 Furthermore, a calcium-based detergent ( B) and,
The ratio [(b2)/(b)] of the content (b2) in terms of calcium atoms of the neutral calcium sulfonate (B2) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0 to 0.40,
The ratio [(b3)/(b)] of the content (b3) in terms of calcium atoms of calcium phenate (B3) to the content (b) in terms of calcium atoms of the calcium-based detergent (B) is 0. ~0.02,
The lubricating oil composition according to claim 1, which is used in an internal combustion engine that operates using hydrogen as fuel. - さらに粘度指数向上剤(C)を含有し、
粘度指数向上剤(C)の樹脂分換算での含有量が、前記潤滑油組成物の全量基準で、0.40質量%以下である、請求項1又は2に記載の潤滑油組成物。 Furthermore, it contains a viscosity index improver (C),
The lubricating oil composition according to claim 1 or 2, wherein the content of the viscosity index improver (C) in terms of resin content is 0.40% by mass or less based on the total amount of the lubricating oil composition. - ターボタージャーを備え、水素を燃料として作動する内燃機関に用いられる、請求項1~3のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 3, which is used in an internal combustion engine equipped with a turbotarger and operated using hydrogen as fuel.
- 請求項1~4のいずれか一項に記載の潤滑油組成物を、内燃機関の潤滑に適用する、内燃機関の潤滑方法。 A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to any one of claims 1 to 4 to lubricate an internal combustion engine.
- 前記内燃機関が、ターボタージャーを備え、水素を燃料として作動する内燃機関である、請求項5に記載の内燃機関の潤滑方法。 The method for lubricating an internal combustion engine according to claim 5, wherein the internal combustion engine is an internal combustion engine that is equipped with a turbotarger and operates using hydrogen as fuel.
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JPH06306384A (en) * | 1993-04-22 | 1994-11-01 | Kyoseki Seihin Gijutsu Kenkyusho:Kk | Fuel-saving lubricating oil |
WO2011115265A1 (en) * | 2010-03-19 | 2011-09-22 | 出光興産株式会社 | Lubricating oil composition for internal combustion engines |
JP2015025079A (en) * | 2013-07-26 | 2015-02-05 | 出光興産株式会社 | Lubricant composition |
JP2016109005A (en) * | 2014-12-04 | 2016-06-20 | マツダ株式会社 | Engine lubrication device |
-
2023
- 2023-05-30 WO PCT/JP2023/020100 patent/WO2023234294A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06306384A (en) * | 1993-04-22 | 1994-11-01 | Kyoseki Seihin Gijutsu Kenkyusho:Kk | Fuel-saving lubricating oil |
WO2011115265A1 (en) * | 2010-03-19 | 2011-09-22 | 出光興産株式会社 | Lubricating oil composition for internal combustion engines |
JP2015025079A (en) * | 2013-07-26 | 2015-02-05 | 出光興産株式会社 | Lubricant composition |
JP2016109005A (en) * | 2014-12-04 | 2016-06-20 | マツダ株式会社 | Engine lubrication device |
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