JP6460967B2 - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
- Publication number
- JP6460967B2 JP6460967B2 JP2015237977A JP2015237977A JP6460967B2 JP 6460967 B2 JP6460967 B2 JP 6460967B2 JP 2015237977 A JP2015237977 A JP 2015237977A JP 2015237977 A JP2015237977 A JP 2015237977A JP 6460967 B2 JP6460967 B2 JP 6460967B2
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- JP
- Japan
- Prior art keywords
- meth
- acrylate
- mass
- lubricating oil
- structural unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010687 lubricating oil Substances 0.000 title claims description 74
- 239000000203 mixture Substances 0.000 title claims description 64
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 118
- 229920000642 polymer Polymers 0.000 claims description 66
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 47
- 239000002199 base oil Substances 0.000 claims description 28
- 239000000178 monomer Substances 0.000 claims description 25
- 238000005227 gel permeation chromatography Methods 0.000 claims description 17
- 125000005647 linker group Chemical group 0.000 claims description 13
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 12
- 230000001050 lubricating effect Effects 0.000 claims description 11
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 6
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 claims description 5
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 description 96
- -1 alkyl maleates Chemical class 0.000 description 45
- 125000004432 carbon atom Chemical group C* 0.000 description 45
- 239000002904 solvent Substances 0.000 description 45
- 238000006116 polymerization reaction Methods 0.000 description 33
- 150000001412 amines Chemical class 0.000 description 22
- 239000003638 chemical reducing agent Substances 0.000 description 18
- 150000004699 copper complex Chemical class 0.000 description 18
- 239000003921 oil Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 239000002585 base Substances 0.000 description 13
- 239000000446 fuel Substances 0.000 description 13
- 239000002480 mineral oil Substances 0.000 description 13
- 235000010446 mineral oil Nutrition 0.000 description 13
- 229910052723 transition metal Inorganic materials 0.000 description 13
- 150000003624 transition metals Chemical class 0.000 description 13
- 239000000654 additive Substances 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 12
- 125000005843 halogen group Chemical group 0.000 description 12
- 239000003999 initiator Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 238000010526 radical polymerization reaction Methods 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000010560 atom transfer radical polymerization reaction Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000002253 acid Substances 0.000 description 9
- 239000003963 antioxidant agent Substances 0.000 description 9
- 235000006708 antioxidants Nutrition 0.000 description 9
- 239000011575 calcium Substances 0.000 description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical group [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000002685 polymerization catalyst Substances 0.000 description 8
- 230000001603 reducing effect Effects 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 7
- 239000003607 modifier Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 150000004678 hydrides Chemical class 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 150000001340 alkali metals Chemical class 0.000 description 5
- 125000003342 alkenyl group Chemical group 0.000 description 5
- 230000003078 antioxidant effect Effects 0.000 description 5
- 230000005587 bubbling Effects 0.000 description 5
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 150000002148 esters Chemical class 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 4
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 4
- 229920000768 polyamine Polymers 0.000 description 4
- 229920000193 polymethacrylate Polymers 0.000 description 4
- 230000027756 respiratory electron transport chain Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 229910052725 zinc Inorganic materials 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 125000003158 alcohol group Chemical group 0.000 description 3
- 150000001342 alkaline earth metals Chemical class 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 235000010323 ascorbic acid Nutrition 0.000 description 3
- 239000011668 ascorbic acid Substances 0.000 description 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 3
- 150000001721 carbon Chemical group 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 239000003446 ligand Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 235000011118 potassium hydroxide Nutrition 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- ZRZHXNCATOYMJH-UHFFFAOYSA-N 1-(chloromethyl)-4-ethenylbenzene Chemical compound ClCC1=CC=C(C=C)C=C1 ZRZHXNCATOYMJH-UHFFFAOYSA-N 0.000 description 2
- BVUXDWXKPROUDO-UHFFFAOYSA-N 2,6-di-tert-butyl-4-ethylphenol Chemical compound CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BVUXDWXKPROUDO-UHFFFAOYSA-N 0.000 description 2
- AVTLBBWTUPQRAY-UHFFFAOYSA-N 2-(2-cyanobutan-2-yldiazenyl)-2-methylbutanenitrile Chemical compound CCC(C)(C#N)N=NC(C)(CC)C#N AVTLBBWTUPQRAY-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- LLEFDCACDRGBKD-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;nonanoic acid Chemical compound CCC(CO)(CO)CO.CCCCCCCCC(O)=O LLEFDCACDRGBKD-UHFFFAOYSA-N 0.000 description 2
- CWTQBXKJKDAOSQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;octanoic acid Chemical compound CCC(CO)(CO)CO.CCCCCCCC(O)=O CWTQBXKJKDAOSQ-UHFFFAOYSA-N 0.000 description 2
- 125000004105 2-pyridyl group Chemical group N1=C([*])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- XOUQAVYLRNOXDO-UHFFFAOYSA-N 2-tert-butyl-5-methylphenol Chemical compound CC1=CC=C(C(C)(C)C)C(O)=C1 XOUQAVYLRNOXDO-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- DJBVDAUKGXUPLO-QEMDMZNVSA-N C(C)C(C(=O)O)CCCC.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O Chemical compound C(C)C(C(=O)O)CCCC.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O.C([C@H](O)[C@H](O)CO)O DJBVDAUKGXUPLO-QEMDMZNVSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical class O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- URGQBRTWLCYCMR-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] nonanoate Chemical compound CCCCCCCCC(=O)OCC(CO)(CO)CO URGQBRTWLCYCMR-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 150000001299 aldehydes Chemical class 0.000 description 2
- 150000004996 alkyl benzenes Chemical class 0.000 description 2
- FPIPGXGPPPQFEQ-OVSJKPMPSA-N all-trans-retinol Chemical compound OC\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C FPIPGXGPPPQFEQ-OVSJKPMPSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 229940072107 ascorbate Drugs 0.000 description 2
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- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
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- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940039790 sodium oxalate Drugs 0.000 description 1
- NESLWCLHZZISNB-UHFFFAOYSA-M sodium phenolate Chemical compound [Na+].[O-]C1=CC=CC=C1 NESLWCLHZZISNB-UHFFFAOYSA-M 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- PPASLZSBLFJQEF-RXSVEWSESA-M sodium-L-ascorbate Chemical compound [Na+].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RXSVEWSESA-M 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- KXCAEQNNTZANTK-UHFFFAOYSA-N stannane Chemical class [SnH4] KXCAEQNNTZANTK-UHFFFAOYSA-N 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000010689 synthetic lubricating oil Substances 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- DZLFLBLQUQXARW-UHFFFAOYSA-N tetrabutylammonium Chemical compound CCCC[N+](CCCC)(CCCC)CCCC DZLFLBLQUQXARW-UHFFFAOYSA-N 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 150000003580 thiophosphoric acid esters Chemical class 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
- 235000010384 tocopherol Nutrition 0.000 description 1
- 229960001295 tocopherol Drugs 0.000 description 1
- 229930003799 tocopherol Natural products 0.000 description 1
- 239000011732 tocopherol Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- PIILXFBHQILWPS-UHFFFAOYSA-N tributyltin Chemical class CCCC[Sn](CCCC)CCCC PIILXFBHQILWPS-UHFFFAOYSA-N 0.000 description 1
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
- 239000005052 trichlorosilane Substances 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- RXJKFRMDXUJTEX-UHFFFAOYSA-N triethylphosphine Chemical compound CCP(CC)CC RXJKFRMDXUJTEX-UHFFFAOYSA-N 0.000 description 1
- CPRPKIMXLHBUGA-UHFFFAOYSA-N triethyltin Chemical compound CC[Sn](CC)CC CPRPKIMXLHBUGA-UHFFFAOYSA-N 0.000 description 1
- CIWZUQUKZAMSIZ-UHFFFAOYSA-N trimethoxy borate Chemical compound COOB(OOC)OOC CIWZUQUKZAMSIZ-UHFFFAOYSA-N 0.000 description 1
- CYTQBVOFDCPGCX-UHFFFAOYSA-N trimethyl phosphite Chemical compound COP(OC)OC CYTQBVOFDCPGCX-UHFFFAOYSA-N 0.000 description 1
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 1
- UKHQRARQNZOXRL-UHFFFAOYSA-N trimethyltin Chemical compound C[SnH](C)C UKHQRARQNZOXRL-UHFFFAOYSA-N 0.000 description 1
- 229910000404 tripotassium phosphate Inorganic materials 0.000 description 1
- 235000019798 tripotassium phosphate Nutrition 0.000 description 1
- MBYLVOKEDDQJDY-UHFFFAOYSA-N tris(2-aminoethyl)amine Chemical compound NCCN(CCN)CCN MBYLVOKEDDQJDY-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 description 1
- CAAIULQYGCAMCD-UHFFFAOYSA-L zinc;hydroxymethanesulfinate Chemical compound [Zn+2].OCS([O-])=O.OCS([O-])=O CAAIULQYGCAMCD-UHFFFAOYSA-L 0.000 description 1
- GVJHHUAWPYXKBD-IEOSBIPESA-N α-tocopherol Chemical compound OC1=C(C)C(C)=C2O[C@@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-IEOSBIPESA-N 0.000 description 1
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- Lubricants (AREA)
Description
[1]潤滑油基油と、粘度指数向上剤とを含有する潤滑油組成物であって、粘度指数向上剤は、幹部と、幹部に結合した2つ以上の枝部と、を有する櫛型ポリマーを含み、幹部は、スチレンに由来する構成単位及び(メタ)アクリレートに由来する構成単位を含み、2つ以上の枝部は、互いに同一でも異なっていてもよく、それぞれ(メタ)アクリレートに由来する構成単位を含み、枝部のそれぞれは、幹部の異なる位置において、スチレンに由来する構成単位のベンゼン環と連結基を介して結合している、潤滑油組成物。
[2]幹部及び2つ以上の枝部に含まれる(メタ)アクリレートに由来する構成単位の全量を基準として、メチルメタアクリレートモノマーに由来する構成単位の割合が30質量%〜50質量%であり、ドデシルメタアクリレートモノマーに由来する構成単位の割合が0質量%〜70質量%であり、オクタデシルメタアクリレートモノマーに由来する構成単位の割合が0質量%〜60質量%である、[1]に記載の潤滑油組成物。
[3]ゲルパーミエーションクロマトグラフィーにより測定される重量平均分子量Mwが20000〜2000000である、[1]又は[2]に記載の潤滑油組成物。
[4]ゲルパーミエーションクロマトグラフィーにより測定される重量平均分子量Mw及び数平均分子量Mnの比Mw/Mnが1.0〜8.0である、[1]〜[3]のいずれか一項に記載の潤滑油組成物。
すなわち、まず、従来の櫛型ポリマー(ポリオレフィンベースのマクロモノマーに由来する繰り返し単位を枝部に有する櫛型ポリマー)の場合、長期間の使用に伴い、櫛形ポリマーの所定位置において結合が開裂し、枝部又はその一部である炭化水素が遊離して濁りが生じるものと考えられる。また、上記炭化水素が遊離した結果、ポリマーの極性のバランスが崩れ基油に溶解できなくなる部分が生成することにより、濁りが生じるとも考えられる。
これに対して、本発明に係る潤滑油組成物に含まれる櫛型ポリマーは、幹部及び複数の枝部の両方が(メタ)アクリレートに由来する構成単位を含み、幹部の所定位置には幹部と各枝部を連結するためにスチレンに由来する構成単位が導入されている。そのため、長期間の使用に伴い櫛形ポリマーの所定位置の結合が開裂しても、枝部又はその一部は(メタ)アクリレートに由来する構成単位を含むため、濁りが生じにくいものと考えられる。
(一般式(1)中、R1及びR2は、それぞれ独立に、水素原子又は炭素数1〜18のアルキル基を示す。)
第1の工程は、ベンゼン環に連結基を介してハロゲン基が結合した構造を有するスチレンと(メタ)アクリレートとのフリーラジカル重合を行う工程である。第1の工程により、上述した第1実施形態に係る櫛型ポリマーの幹部となるポリマー、すなわち、ベンゼン環に連結基を介してハロゲン基が結合した構造を有するスチレンに由来する構成単位と、(メタ)アクリレートに由来する構成単位と、を有するポリマーを得ることができる。重合は、例えば、溶液中に、上記(メタ)アクリレート、上記スチレン、ラジカル開始剤、連鎖移動剤等を加え、50〜150℃の温度範囲で反応させることにより行うことができる。
(一般式(2)中、R1及びR2は、それぞれ独立に、水素原子又は炭素数1〜18のアルキル基を示し、XはCl、Br及びIからなる群より選択されるハロゲン原子を示す。)
第2の工程は、第1の工程で得られるポリマーのハロゲン基を起点として(メタ)アクリレートの制御ラジカル重合を行う工程である。第2の工程により、第1実施形態に係る櫛型ポリマー、すなわち、幹部と、幹部に結合した2つ以上の枝部と、を有し、幹部は、スチレンに由来する構成単位及び(メタ)アクリレートに由来する構成単位を含み、2つ以上の枝部は、互いに同一でも異なっていてもよく、それぞれ(メタ)アクリレートに由来する構成単位を含み、枝部のそれぞれは、幹部の異なる位置において、スチレンに由来する構成単位のベンゼン環と連結基を介して結合している、櫛型ポリマーを得ることができる。第2の工程における制御ラジカル重合(制御重合)は、起点となる幹部のスチレンに由来する構成単位中に存在するハロゲン基を開始剤として重合することができる。以下、制御重合方法について説明する。
(製造例1)
攪拌機及び還流冷却管を備えたセパラブルフラスコ(1)に重合溶媒として鉱油49.7gを仕込み室温で窒素バブリングを30分行った。攪拌機を備えた3つ口フラスコ(2)に幹部用モノマーとしてメチルメタクリレート(MMA;和光純薬(株)製)8.2g、ドデシルメタクリレート(LMA;和光純薬(株)製)8.2g、オクタデシルメタクリレート(SMA;東京化成工業(株)製)10.9g、4−(クロロメチル)スチレン(CMSt;東京化成工業(株)製)1.2g及びモノマー溶解用溶媒としてトルエン28.4gを仕込み撹拌混合により均一溶液としたのちに窒素バブリングを30分行った。また、2口フラスコ(3)に開始剤として2,2−アゾビス(2−メチルブチロニトリル)(V−59;和光純薬工業(株)製、商品名)0.07gを仕込み開始剤溶解用溶媒として酢酸イソプロピル16.6gと撹拌混合して均一溶液としたのちに窒素バブリングを30分行った。(3)を(2)に全量加えたのちに更に窒素バブリングを15分行った。(1)をオイルバス中で加温して内温が105℃となったところで(2)を滴下することで重合を開始した。約90分間で(2)が全量滴下するように調整した。(2)を滴下終了後引き続き約5時間撹拌したのちに冷却して幹部を形成するためのポリマーを得た。該ポリマーのGPCにより得られた重量平均分子量(Mw)は69000であり、数平均分子量(Mn)は37000であり、分子量分布は1.9であった。引き続き上記ポリマーを含むセパラブルフラスコ(1)に重合触媒として第二塩化銅(CuCl2)14mg及び多座アミンとしてトリス[(2−ピリジル)メチル]アミン(TPMA;Aldrich製)0.18gを触媒溶解用溶媒であるエタノール1.0gに溶解した溶液を仕込み撹拌混合した。さらに、枝部用モノマーとしてメチルメタクリレート52.2g並びにドデシルメタクリレート77.8g及び重合溶媒として鉱油267.1gを仕込み撹拌混合により均一溶液としたのちに30分窒素バブリングを行った。オイルバス中で加温して内温が80℃となったところで還元剤であるオクチル酸スズ0.057mlを添加して重合を開始した。内温80℃を維持しつつオクチル酸スズを30分ごとに2回追加した後に1時間ごとに2回(合計0.28ml)追加した。オクチル酸スズ追加後約4時間撹拌したのちに内温を120℃にして未反応のモノマー及びトルエンを減圧条件下で除去して櫛型ポリマー1を得た。櫛型ポリマー1のGPCにより得られた重量平均分子量(Mw)は388000であり、数平均分子量(Mn)は192000であり、分子量分布(Mw/Mn)は2.0であった。幹部の形成に用いた開始剤溶解用溶媒、幹部用モノマー、重合溶媒、モノマー溶解用溶媒及び開始剤溶解用溶媒、並びに枝部の形成に用いた枝部用モノマー、重合溶媒、重合触媒、多座アミン、触媒溶解用溶媒及び還元剤の配合を表1に示し、得られた櫛型ポリマー1における幹部及び枝部のモノマー組成(質量%)、幹部及び櫛型ポリマー1の数平均分子量(Mn)、重量平均分子量(Mw)及び分子量分布(Mw/Mn)、並びに櫛型ポリマー1の(メタ)アクリレートに由来する構成単位全量を基準とした各(メタ)アクリレートに由来する構成単位モノマーの組成(質量%)を表3に示す。
幹部の形成に用いた開始剤溶解用溶媒、幹部用モノマー、重合溶媒、モノマー溶解用溶媒及び開始剤溶解用溶媒、並びに枝部の形成に用いた枝部用モノマー、重合溶媒、重合触媒、多座アミン、触媒溶解用溶媒及び還元剤の配合を表1及び2に示すとおりに変更し、それ以外は上記に示した製造例1と同様にして櫛型ポリマー2〜17を合成した。得られた櫛型ポリマー2〜17における幹部及び枝部のモノマー組成(質量%)、幹部及び櫛型ポリマー2〜17の数平均分子量(Mn)、重量平均分子量(Mw)及び分子量分布(Mw/Mn)、並びに櫛型ポリマー2〜17の(メタ)アクリレートに由来する構成単位全量を基準とした各(メタ)アクリレートに由来する構成単位モノマーの組成(質量%)を表3及び4に示す。なお表中、ナイパーBWは、過酸化ベンゾイル(日本油脂(株)製)を表す。
(実施例1〜17)
潤滑油組成物全量基準で、製造例1〜17で調製した櫛型ポリマー1〜17を粘度指数向上剤として、潤滑油基油(API GroupIII基油、100℃における動粘度:4.2mm2/s、粘度指数:125)及び添加剤(MoDTC系摩擦調整剤(Mo含有量10質量%、S含有量11質量%)0.5質量%、コハク酸イミド系無灰分散剤4.0質量%、ZnDTP系摩耗防止剤(P含有量6.5質量%)1質量%、アミン系酸化防止剤0.8質量%、及び過塩基性カルシウムスルホネート(塩基価170mgKOH/g、Ca含有量6.3質量%)2.5質量%からなるパッケージ型性能添加剤)を表5及び6に示すとおりに配合し、それぞれ実施例1〜17の潤滑油組成物を調製した。
従来の櫛型ポリマーC1(ポリオレフィンベースのマクロモノマーに由来する繰り返し単位を枝部に有する櫛型ポリマー)を特許文献2の実施例4に従い合成した。得られた櫛型ポリマーC1の重量平均分子量は300000であった。この櫛型ポリマーC1を粘度指数向上剤として、潤滑油基油(API GroupIII基油、100℃における動粘度:4.2mm2/s、粘度指数:125)及び添加剤(MoDTC系摩擦調整剤(Mo含有量10質量%、S含有量11質量%)0.5質量%、コハク酸イミド系無灰分散剤4.0質量%、ZnDTP系摩耗防止剤(P含有量6.5質量%)1質量%、アミン系酸化防止剤0.8質量%、及び過塩基性カルシウムスルホネート(塩基価170mgKOH/g、Ca含有量6.3質量%)2.5質量%からなるパッケージ型性能添加剤)を表6に示すとおりに配合し、比較例1の潤滑油組成物を調製した。
得られた潤滑油組成物について、各種性状(100℃における動粘度、100℃及び150℃でのHTHS粘度、せん断安定性並びに−40℃でのMRV粘度)を表5及び6に示す。なお、濁り試験及び櫛型ポリマーの基油への溶解性試験は、以下の方法に従って評価した。評価結果を表5及び6に示す。表5及び6中、「Y.S.」は降伏応力(Yield Stress)を意味する。降伏応力が有の場合は規格はずれを意味する。
得られた潤滑油組成物に対してJPI−5S−29−88超音波せん断安定度試験(10kHz、10h)を実施し、試験後の試料油を0℃で30日間保管した後、潤滑油組成物に濁りが認められるか否か評価した。評価結果を表5及び6に示す。表5及び6中、濁りが認められた場合をY、認められない場合をNと表記する。
櫛型ポリマーを基油に対して3.3質量%となるように混合し120℃で2時間加熱撹拌した後に室温まで冷却して溶液の外観を目視で評価した。判定は以下のとおりとした。
○:均一な溶液状態。
×:ポリマーが沈殿し基油と分離した状態。
Claims (4)
- 潤滑油基油と、粘度指数向上剤とを含有する潤滑油組成物であって、
前記粘度指数向上剤は、幹部と、前記幹部に結合した2つ以上の枝部と、を有する櫛型ポリマーを含み、
前記幹部は、スチレンに由来する構成単位及び(メタ)アクリレートに由来する構成単位を含み、
前記2つ以上の枝部は、互いに同一でも異なっていてもよく、それぞれ(メタ)アクリレートに由来する構成単位を含み、
前記枝部のそれぞれは、前記幹部の異なる位置において、前記スチレンに由来する構成単位のベンゼン環と連結基を介して結合している、潤滑油組成物。 - 前記幹部及び前記2つ以上の枝部に含まれる(メタ)アクリレートに由来する構成単位の全量を基準として、メチルメタアクリレートモノマーに由来する構成単位の割合が30質量%〜50質量%であり、ドデシルメタアクリレートモノマーに由来する構成単位の割合が0質量%〜70質量%であり、オクタデシルメタアクリレートモノマーに由来する構成単位の割合が0質量%〜60質量%である、請求項1に記載の潤滑油組成物。
- ゲルパーミエーションクロマトグラフィーにより測定される重量平均分子量Mwが20000〜2000000である、請求項1又は2に記載の潤滑油組成物。
- ゲルパーミエーションクロマトグラフィーにより測定される重量平均分子量Mw及び数平均分子量Mnの比Mw/Mnが1.0〜8.0である、請求項1〜3のいずれか一項に記載の潤滑油組成物。
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