EP3375852B1 - Lubricant composition and lubricating method - Google Patents
Lubricant composition and lubricating method Download PDFInfo
- Publication number
- EP3375852B1 EP3375852B1 EP16863905.2A EP16863905A EP3375852B1 EP 3375852 B1 EP3375852 B1 EP 3375852B1 EP 16863905 A EP16863905 A EP 16863905A EP 3375852 B1 EP3375852 B1 EP 3375852B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricating oil
- oil composition
- mass
- component
- content
- 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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- 239000000203 mixture Substances 0.000 title claims description 152
- 238000000034 method Methods 0.000 title claims description 32
- 230000001050 lubricating effect Effects 0.000 title claims description 8
- 239000000314 lubricant Substances 0.000 title description 5
- 239000010687 lubricating oil Substances 0.000 claims description 159
- 239000002480 mineral oil Substances 0.000 claims description 45
- 239000003963 antioxidant agent Substances 0.000 claims description 42
- 235000010446 mineral oil Nutrition 0.000 claims description 41
- 230000003078 antioxidant effect Effects 0.000 claims description 40
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 34
- -1 diphenylamine compound Chemical class 0.000 claims description 33
- 239000002518 antifoaming agent Substances 0.000 claims description 28
- 150000001412 amines Chemical class 0.000 claims description 17
- 229920000058 polyacrylate Polymers 0.000 claims description 9
- DMBHHRLKUKUOEG-UHFFFAOYSA-N N-phenyl aniline Natural products C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 6
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 238000010227 cup method (microbiological evaluation) Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 description 38
- 238000007254 oxidation reaction Methods 0.000 description 38
- 125000000217 alkyl group Chemical group 0.000 description 22
- 239000010802 sludge Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 15
- 230000007774 longterm Effects 0.000 description 14
- 239000000654 additive Substances 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 9
- 238000006731 degradation reaction Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 8
- 239000002199 base oil Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000002253 acid Substances 0.000 description 7
- 125000003118 aryl group Chemical group 0.000 description 7
- 125000004432 carbon atom Chemical group C* 0.000 description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004821 distillation Methods 0.000 description 5
- 238000005227 gel permeation chromatography Methods 0.000 description 5
- 239000000383 hazardous chemical Substances 0.000 description 5
- 229920000193 polymethacrylate Polymers 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- 125000003277 amino group Chemical group 0.000 description 4
- 230000003064 anti-oxidating effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 125000001624 naphthyl group Chemical group 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000001993 wax Substances 0.000 description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 3
- 230000003254 anti-foaming effect Effects 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000013256 coordination polymer Substances 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 238000012065 two one-sided test Methods 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- HNURKXXMYARGAY-UHFFFAOYSA-N 2,6-Di-tert-butyl-4-hydroxymethylphenol Chemical compound CC(C)(C)C1=CC(CO)=CC(C(C)(C)C)=C1O HNURKXXMYARGAY-UHFFFAOYSA-N 0.000 description 2
- 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 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004517 catalytic hydrocracking Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000012208 gear oil Substances 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 230000001976 improved effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 239000010723 turbine oil Substances 0.000 description 2
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 1
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
- OPLCSTZDXXUYDU-UHFFFAOYSA-N 2,4-dimethyl-6-tert-butylphenol Chemical compound CC1=CC(C)=C(O)C(C(C)(C)C)=C1 OPLCSTZDXXUYDU-UHFFFAOYSA-N 0.000 description 1
- 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 1
- GJDRKHHGPHLVNI-UHFFFAOYSA-N 2,6-ditert-butyl-4-(diethoxyphosphorylmethyl)phenol Chemical compound CCOP(=O)(OCC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 GJDRKHHGPHLVNI-UHFFFAOYSA-N 0.000 description 1
- VMZVBRIIHDRYGK-UHFFFAOYSA-N 2,6-ditert-butyl-4-[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VMZVBRIIHDRYGK-UHFFFAOYSA-N 0.000 description 1
- QHPKIUDQDCWRKO-UHFFFAOYSA-N 2,6-ditert-butyl-4-[2-(3,5-ditert-butyl-4-hydroxyphenyl)propan-2-yl]phenol Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(C(C)(C)C=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 QHPKIUDQDCWRKO-UHFFFAOYSA-N 0.000 description 1
- PFANXOISJYKQRP-UHFFFAOYSA-N 2-tert-butyl-4-[1-(5-tert-butyl-4-hydroxy-2-methylphenyl)butyl]-5-methylphenol Chemical compound C=1C(C(C)(C)C)=C(O)C=C(C)C=1C(CCC)C1=CC(C(C)(C)C)=C(O)C=C1C PFANXOISJYKQRP-UHFFFAOYSA-N 0.000 description 1
- GPNYZBKIGXGYNU-UHFFFAOYSA-N 2-tert-butyl-6-[(3-tert-butyl-5-ethyl-2-hydroxyphenyl)methyl]-4-ethylphenol Chemical compound CC(C)(C)C1=CC(CC)=CC(CC=2C(=C(C=C(CC)C=2)C(C)(C)C)O)=C1O GPNYZBKIGXGYNU-UHFFFAOYSA-N 0.000 description 1
- BKZXZGWHTRCFPX-UHFFFAOYSA-N 2-tert-butyl-6-methylphenol Chemical compound CC1=CC=CC(C(C)(C)C)=C1O BKZXZGWHTRCFPX-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
- SOASHAVJCWKTKL-UHFFFAOYSA-N 4-methyl-2,6-bis(2-methylbutan-2-yl)phenol Chemical compound CCC(C)(C)C1=CC(C)=CC(C(C)(C)CC)=C1O SOASHAVJCWKTKL-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- UUNBFTCKFYBASS-UHFFFAOYSA-N C(CCCCCCC)C=1C(=C(C=CC1)NC1=CC=CC=C1)CCCCCCCC Chemical compound C(CCCCCCC)C=1C(=C(C=CC1)NC1=CC=CC=C1)CCCCCCCC UUNBFTCKFYBASS-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 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 1
- 239000004793 Polystyrene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 1
- JYMQFZFDRMIPGC-UHFFFAOYSA-N [C].C1=CC=CC2=CC=CC=C21 Chemical compound [C].C1=CC=CC2=CC=CC=C21 JYMQFZFDRMIPGC-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 1
- 229940053200 antiepileptics fatty acid derivative Drugs 0.000 description 1
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002511 behenyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000003901 ceryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 125000000755 henicosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002818 heptacosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 125000002463 lignoceryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 125000002819 montanyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 125000001802 myricyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- ZLUHLPGJUZHFAR-UHFFFAOYSA-N n-[4-(2,4,4-trimethylpentan-2-yl)phenyl]naphthalen-1-amine Chemical compound C1=CC(C(C)(C)CC(C)(C)C)=CC=C1NC1=CC=CC2=CC=CC=C12 ZLUHLPGJUZHFAR-UHFFFAOYSA-N 0.000 description 1
- 125000002465 nonacosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001196 nonadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002460 pentacosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000002469 tricosyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
-
- 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
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
-
- 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
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/02—Well-defined hydrocarbons
- C10M105/06—Well-defined hydrocarbons aromatic
-
- 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
- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/02—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a non-macromolecular organic 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
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino 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
- C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
- C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M145/10—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate
-
- 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
- C10M155/00—Lubricating compositions characterised by the additive being a macromolecular compound containing atoms of elements not provided for in groups C10M143/00 - C10M153/00
- C10M155/02—Monomer containing silicon
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M161/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
-
- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/06—Well-defined aromatic compounds
- C10M2203/065—Well-defined aromatic compounds used as base material
-
- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
- C10M2215/065—Phenyl-Naphthyl amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/066—Arylene diamines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/26—Amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/02—Unspecified siloxanes; Silicones
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/02—Pour-point; Viscosity index
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/18—Anti-foaming property
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/135—Steam engines or turbines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/30—Refrigerators lubricants or compressors lubricants
Definitions
- the present invention relates to a lubricating oil composition, and to a lubricating method using the lubricating oil composition.
- a lubricating oil composition for use for turbines such as steam turbines, gas turbines, etc., rotary gas compressors, hydraulic machines and the like is used to circulate in a system in high-temperature environments for a long period of time.
- the lubricating oil composition used for a long period of time in high-temperature environments often involves risks of performance degradation owing to oxidation and sludge precipitation owing to oxidation.
- the precipitated sludge may cause problems of, for example, damage to bearings owing to heat generation after adhesion to rotor bearings, occurrence of clogging of filters arranged in circulation lines, control system operation failure owing to deposition on control valves, etc.
- a lubricating oil composition for use for turbines, rotary gas compressors, hydraulic machines and the like is required to have excellent oxidation stability capable of preventing performance degradation and sludge generation owing to oxidation even when used in high-temperature environments for a long period of time.
- PTL 1 discloses a lubricating oil composition containing a refined mineral oil or a synthetic hydrocarbon oil such as a poly- ⁇ -olefin or the like as a base oil and containing two kinds of naphthylamine-based antioxidants each having a specific structure in a predetermined ratio.
- PTL 2 discloses a lubricating oil composition containing a lubricant base oil that has an aromatic content (%C A ) of 2 or less, a ratio of a paraffin content (%Cp) to a naphthene content (%C N ) of 6 or more and an iodine value of 2.5 or less, and a sulfur atom-free ash-free antioxidant, and further containing an alkyl group-substituted aromatic hydrocarbon compound such as an alkylnaphthalene or the like.
- %C A aromatic content
- %Cp paraffin content
- %C N naphthene content
- PTLs 1 and 2 both intend to provide a lubricating oil composition having oxidation stability and an improved effect of suppression of sludge formation.
- PTL 3 relates to a lubricating oil composition which comprises a paraffinic mineral oil, an ashless antioxidant, and an alkyl group-substituted aromatic hydrocarbon compound, wherein the alkyl group-substituted aromatic hydrocarbon compound is at least one compound containing one or two C 8-30 alkyl groups selected from alkyl benzenes, alkyl naphthalenes, alkyl biphenyls and alkyl diphenylalkanes, and the ashless antioxidant is an antioxidant blend of an alkylated diphenylamine and a phenyl- ⁇ -naphthylamine in a ratio of 0.1 to 0.9. PTL 3 does not define the flash point of components and the lubricating oil composition.
- lubricating oil compositions having a flash point of 250°C or higher, which are to be grouped in "flammable liquids" in the Fire Service Act, are required.
- Such high-flash-point lubricating oil compositions are heretofore required in the world from the viewpoint of safety and handleability in storage and transportation.
- Examples in PTL 2 disclose an alkylnaphthalene-containing lubricating oil composition.
- the present inventors' investigation has revealed that, in long-term use of an alkylnaphthalene for more than 1,000 hours in high-temperature environments, the naphthalene ring is gradually cleaved to cause reduction in sludge solubility. Consequently, it may be said that the alkylnaphthalene-containing lubricating oil composition causes reduction in oxidation stability in long-term use.
- the present invention has an object of providing a lubricating oil composition having a high flash point of 250°C or higher and having an excellent long lifetime to such an extent that the lubricating oil composition can maintain excellent oxidation stability even in long-term use in high-temperature environments, and providing a lubricating method using the lubricating oil composition.
- the present inventors have found that a lubricating oil composition containing an alkylbenzene whose flash point falls within a specific range along with a refined paraffinic mineral oil can solve the above-mentioned problems, and have completed the present invention.
- the present invention provides the following [1] and [2].
- the lubricating oil composition of the present invention has a high flash point of 250°C or higher and has an excellent long lifetime to such an extent that the lubricating oil composition can maintain excellent oxidation stability even in long-term use in high-temperature environments.
- flash point is a value measured according to a Cleveland open-cup method (C.O.C method) according to JIS K2265 ⁇ 4, and "kinematic viscosity” and “viscosity index” each are a value measured according to JIS K2283.
- lubricating oil composition not substantially containing a component X is to exclude “a lubricating oil composition intentionally mixed with a component X with a specific motivation", and the lubricating oil composition may contain a minor amount of the component X that may be contained therein as an impurity.
- the content of the component X that may be contained therein as an impurity is preferably less than 0.01% by mass based on the total amount (100% by mass) of the lubricating oil composition, more preferably less than 0.001% by mass, even more preferably less than 0.0001% by mass, further more preferably less than 0.00001% by mass.
- the lubricating oil composition of the present invention contains a refined paraffinic mineral oil (A) and an alkylbenzene (B) having a flash point of 160°C or higher, and has a flash point of 250°C or higher.
- the lubricating oil composition of the present invention contains the component (A) and the component (B) mixed in such a ratio that the flash point thereof is 250°C or higher, and is grouped in "flammable liquids" defined in the Fire Service Act enforced in 2002 in Japan. Consequently, the lubricating oil composition is excellent in safety and handleability.
- high-flash-point lubricating oil compositions often involve performance degradation and sludge precipitation owing to oxidation in long-term use in high-temperature environments, and have problems in that the oxidation stability thereof is poor and lifetime thereof is short.
- the lubricating oil composition of the present invention contains an alkylbenzene (B) having a flash point falling within the above-mentioned range along with a refined paraffinic mineral oil (A), and therefore, while having a flash point of 250°C or higher, the lubricating oil composition can be prevented from oxidation degradation and can dissolve the sludge to form in use and therefore can suppress sludge precipitation, and can contribute toward improvement of oxidation stability.
- B alkylbenzene
- A refined paraffinic mineral oil
- the alkylbenzene as the component (B) has high durability even in long-term use in high temperature environments, and can contribute toward prolongation of the lifetime of the lubricating oil composition.
- the lubricating oil composition of one aspect of the present invention further contains an anti-foaming agent (C) containing a polyacrylate-based anti-foaming agent (C1).
- the lubricating oil composition of the present invention further contains an antioxidant (D) containing an amine-based antioxidant (D1).
- the lubricating oil composition of one aspect of the present invention may contain any other base oil and additives for a lubricating oil than the above-mentioned components (A) to (D) within a range not detracting from the advantageous effects of the invention.
- the total content of the component (A) and the component (B) is preferably 60.1% by mass or more based on the total amount (100% by mass) of the lubricating oil composition, more preferably 70% by mass or more, even more preferably 75% by mass or more, further more preferably 80% by mass or more, especially preferably 85% or more, and is generally 100% by mass or less, preferably 95% by mass or less.
- the total content of the component (A), the component (B) and the component (C) is preferably 62% by mass or more based on the total amount (100% by mass) of the lubricating oil composition, more preferably 70% by mass or more, even more preferably 75% by mass or more, further more preferably 80% by mass or more, especially preferably 85% or more, and is generally 100% by mass or less, preferably 95% by mass or less.
- the total content of the component (A), the component (B) and the component (D) is preferably 62% by mass or more based on the total amount (100% by mass) of the lubricating oil composition, more preferably 70% by mass or more, even more preferably 75% by mass or more, further more preferably 80% by mass or more, especially preferably 85% or more, and is generally 100% by mass or less, preferably 95% by mass or less.
- the total content of the component (A), the component (B), the component (C) and the component (D) is preferably 65% by mass or more based on the total amount (100% by mass) of the lubricating oil composition, more preferably 70% by mass or more, even more preferably 75% by mass or more, further more preferably 80% by mass or more, especially preferably 85% or more, and is generally 100% by mass or less, preferably 95% by mass or less.
- the additives for a lubricating oil such as an anti-foaming agent, a viscosity index improve and others may be blended with the other components in the form of a solution thereof dissolved in a diluent oil selected from a mineral oil, a synthetic oil, a light oil and the like in consideration of the handleability and the solubility thereof in the components (A) and (B).
- a diluent oil selected from a mineral oil, a synthetic oil, a light oil and the like in consideration of the handleability and the solubility thereof in the components (A) and (B).
- the content of the additive for a lubricating oil such as an anti-foaming agent, a viscosity index improver or the like means the active ingredient-equivalent (resin content-equivalent) content thereof excluding the lubricating oil.
- the refined paraffinic mineral oil (A) for use in the present invention indicates a paraffinic mineral oil obtained through refining treatment of a lubricant fraction obtained in atmospheric distillation of crude oil.
- the refined paraffinic mineral oil (A) include a paraffinic mineral oil obtained via a refining step of one or more selected from solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid treatment and clay treatment of a lubricant fraction obtained through atmospheric distillation of a crude oil; a paraffinic mineral oil produced according to a process of isomerization of a wax-isomerized mineral oil or a GTL WAX (a gas-to-liquid wax or a Fischer Tropsch wax); etc.
- a paraffinic mineral oil obtained via a refining step of one or more selected from solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid treatment and clay treatment of a lubricant fraction obtained through atmospheric distillation of a crude oil
- the refined paraffinic mineral oil (A) for use in the present invention may be used singly or two or more thereof may be used in combination.
- the paraffin content (%Cp) of the refined paraffinic mineral oil (A) is preferably 65 or more, more preferably 70 or more, even more preferably 72 or more, further more preferably 75 or more.
- the naphthene content (%CN) of the refined paraffinic mineral oil (A) is preferably 35 or less, more preferably 30 or less, even more preferably 28 or less, further more preferably 25 or less.
- the aromatic content (%C A ) of the refined paraffinic mineral oil (A) is preferably less than 2.0, more preferably less than 1.5, even more preferably less than 1.0, further more preferably less than 0.1.
- %Cp, %C N and %C A of component (A) are those measured according to the method of ASTM D 3238-85 (n-d-M ring analysis), and each means the "proportion of paraffin carbon number", the “proportion of naphthene carbon number” and the “proportion of aromatic carbon number” relative to the total carbon number (100%) of component (A), respectively.
- the flash point of the refined paraffinic mineral oil (A) is 250°C or higher, preferably 253°C or higher, more preferably 255°C or higher, and is preferably 280°C or lower.
- the lubricating oil composition whose flash point is 250°C or higher can be produced.
- the lubricating oil composition can maintain excellent oxidation stability for a long period of time, and the lifetime thereof can be thereby prolonged.
- a refined paraffinic mineral oil (A) having a high flash point can be obtained. Namely, with increase in refining frequency, the resultant paraffinic mineral oil may have a higher flash point.
- the kinematic viscosity at 40°C of the refined paraffinic mineral oil (A) is preferably 20 to 300 mm 2 /s, more preferably 23 to 200 mm 2 /s, even more preferably 25 to 100 mm 2 /s.
- the viscosity index of the refined paraffinic mineral oil (A) is preferably 100 or more, more preferably 110 or more, even more preferably 120 or more, further more preferably 130 or more.
- the acid number of the refined paraffinic mineral oil (A) is preferably 0.05 mgKOH/g or less, more preferably 0.03 mgKOH/g or less, even more preferably 0.01 mgKOH/g or less.
- the acid number means a value measured according to the indicator method of JIS K2501.
- the density at 15°C of the refined paraffinic mineral oil (A) is preferably 0.800 to 0.930 g/cm 3 , more preferably 0.810 to 0.900 g/cm 3 , even more preferably 0.820 to 0.880 g/cm 3 .
- the density at 15°C means a value measured according to JIS K2249-1.
- the pour point of the refined paraffinic mineral oil (A) is preferably 0°C or lower, more preferably -5°C or lower, even more preferably -10°C or lower, further more preferably -15°C or lower.
- the pour point means a value measured according to JIS K2269.
- the content of the component (A) in the lubricating oil composition of one aspect of the present invention is, based on the total amount (100% by mass) of the lubricating oil composition, 60 to 99.9% by mass, preferably 70 to 99.5% by mass, more preferably 80 to 99.0% by mass, even more preferably 85 to 99.0% by mass.
- the lubricating oil composition having a flash point of 250°C or higher is easy to prepare.
- the lubricating oil composition can maintain excellent oxidation stability for a long period of time, therefore contributing toward prolonging the lifetime thereof.
- the content of the component (A) is 99.9% by mass or less, the content of the alkylbenzene (B) can be secured and the lubricating oil composition can be prevented from undergoing oxidation degradation and sludge precipitation and can therefore maintain excellent oxidation stability for a long period of time.
- the lubricating oil composition of one aspect of the present invention may contain any other base oil not corresponding to the component (A).
- the other base oil may be a mineral oil or a synthetic oil.
- Examples of the mineral oil include an atmospheric residue obtained through atmospheric distillation of a crude oil such as an intermediate mineral oil, a naphthenic mineral oil, etc.; a distillate oil obtained through reduced-pressure distillation of the atmospheric residue; a mineral oil and a wax obtained after one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining or the like of the distillate oil; etc.
- Mineral oils grouped in Group 2 and Group 3 of the API base oil category are preferred; and mineral oils grouped in Group 3 thereof are more preferred.
- the lubricating oil composition of one aspect of the present invention may contain an unrefined paraffinic mineral oil not corresponding to the component (A).
- Examples of the synthetic oil include poly- ⁇ -olefins such as polybutene, ⁇ -olefin homopolymers or copolymers (e.g., C 8-14 ⁇ -olefin homopolymers or copolymers such as ethylene- ⁇ -olefin copolymers, etc.), etc.; etc.
- poly- ⁇ -olefins such as polybutene, ⁇ -olefin homopolymers or copolymers (e.g., C 8-14 ⁇ -olefin homopolymers or copolymers such as ethylene- ⁇ -olefin copolymers, etc.), etc.; etc.
- alkylbenzene belongs to the component (B) to be mentioned below, but not to this category of "synthetic oil”.
- the content of the other base oil is, based on the total amount of 100 parts by mass of the component (A), preferably 0 to 30 parts by mass, more preferably 0 to 20 parts by mass, even more preferably 0 to 10 parts by mass, further more preferably 0 to 5 parts by mass.
- the alkylbenzene (B) for use in the present invention may be any compound where at least one hydrogen atom of one benzene ring is substituted with an alkyl group.
- the alkylbenzene (B) may be used singly or two or more thereof may be used in combination.
- alkyl group that the alkylbenzene (B) has examples include a methyl group, an ethyl group, various propyl groups, various butyl groups, various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups, various nonyl groups, various decyl groups, various undecyl groups, various dodecyl groups, various tridecyl groups, various tetradecyl groups, various pentadecyl groups, various hexadecyl groups, various heptadecyl groups, various octadecyl groups, various nonadecyl groups, various eicosyl groups, various heneicosyl groups, various docosyl groups, various tricosyl groups, various tetracosyl groups, various pentacosyl groups, various hexacosyl groups, various heptacosyl groups, various octacosyl groups, various nonacosyl
- variable XX groups include all isomers of the target XX group.
- the number of the alkyl groups substituted on one benzene ring is 1 or more, but is preferably 1 to 4, more preferably 1 to 2.
- the alkylbenzene (B) has plural alkyl groups
- the plural alkyl groups may be the same as each other, or may be different from each other.
- the number of the carbon atoms that each alkyl group of the alkylbenzene (B) has is preferably 1 to 40, more preferably 4 to 35, even more preferably 8 to 30.
- the flash point of the alkylbenzene (B) for use in the present invention is 160°C or higher, preferably 170°C or higher, more preferably 175°C or higher, further more preferably 180°C or higher, and even further more preferably 185°C or higher.
- the flash point of the component (B) When the flash point of the component (B) is lower than 160°C, the lubricating oil composition having a flash point of 250°C or higher is difficult to prepare.
- the flash point of the resultant lubricating oil composition may be increased, but the content of the component (B) in the composition is small, and therefore in long-term use thereof, the effect of suppressing the risk of oxidation degradation or sludge precipitation in the lubricating oil composition may be often insufficient.
- the flash point of the alkylbenzene (B) is preferably 250°C lower, more preferably 230°C or lower, even more preferably 220°C or lower, further more preferably 210°C or lower.
- the kinematic viscosity at 40°C of the alkylbenzene (B) is, from the viewpoint of providing a long-life lubricating oil composition capable of maintaining excellent oxidation stability even in long-term use, preferably 45 to 80 mm 2 /s, more preferably 47 to 75 mm 2 /s, even more preferably 50 to 70 mm 2 /s, further more preferably 52 to 65 mm 2 /s.
- the kinematic viscosity at 100°C of the alkylbenzene (B) is, from the viewpoint of providing a long-life lubricating oil composition capable of maintaining excellent oxidation stability even in long-term use, preferably 1 to 40 mm 2 /s, more preferably 2 to 30 mm 2 /s, even more preferably 3 to 20 mm 2 /s, further more preferably 4 to 10 mm 2 /s.
- the density at 15°C of the alkylbenzene (B) is preferably 0.820 to 0.940 g/cm 3 , more preferably 0.835 to 0.920 g/cm 3 , even more preferably 0.850 to 0.900 g/cm 3 .
- the pour point of the alkylbenzene (B) is preferably -10°C or lower, more preferably -15°C or lower, even more preferably -20°C or lower, further more preferably -30°C or lower.
- the content of the component (B) is, based on the total amount (100% by mass) of the lubricating oil composition, 0.1 to 10% by mass, preferably 0.15 to 9% by mass, more preferably 0.2 to 7.5% by mass, even more preferably 0.3 to 6% by mass, further preferably 0.4 to 5.5% by mass.
- the lubricating oil composition capable of suppressing oxidation degradation and sludge precipitation and capable of maintaining excellent oxidation stability for a long period of time can be obtained.
- the lubricating oil composition when the content of the component (B) is 10% by mass or less, the lubricating oil composition having a flash point of 250°C or higher can be obtained.
- the lubricating oil composition can maintain excellent oxidation stability for a long period of time, and can therefore contribute toward prolonging the lifetime thereof.
- the lubricating oil composition of one aspect of the present invention does not substantially contain an alkylnaphthalene.
- the naphthalene ring in an alkylnaphthalene is gradually cleaved to cause reduction in sludge solubility.
- the lubricating oil composition containing an alkylnaphthalene tends to undergo oxidation stability degradation and the lifetime thereof tends to be short.
- the content of an alkylnaphthalene is preferably as small as possible.
- the content of an alkylnaphthalene is, relative to 100 parts by mass of the total amount of the component (B), preferably 10 parts by mass or less, more preferably 5 parts by mass or less, even more preferably 1 part by mass or less, further more preferably 0.1 parts by mass or less, especially preferably less than 0.01 parts by mass.
- the lubricating oil composition of one aspect of the present invention further contains an anti-foaming agent (C) containing a polyacrylate-based anti-foaming agent (C1) from the viewpoint of improving anti-foaming performance and vapor releasing performance.
- an anti-foaming agent (C) containing a polyacrylate-based anti-foaming agent (C1) from the viewpoint of improving anti-foaming performance and vapor releasing performance.
- Examples of the polyacrylate-based anti-foaming agent (C1) include a polymethacrylate (PMA) and a modified derivative thereof, etc.
- a polymethacrylate is preferred.
- the polyacrylate-based anti-foaming agent (C1) may be used singly or two or more thereof may be used in combination.
- the weight average molecular weight (Mw) of the polyacrylate-based anti-foaming agent (C1) is preferably 10,000 to 200,000, more preferably 15,000 to 150,000, even more preferably 20,000 to 100,000.
- the weight average molecular weight (Mw) is a standard polystyrene-equivalent value measured according to a method of GPC (gel permeation chromatography), and specifically, this is a value measured according to the method described in the section of Examples.
- the composition may contain any other anti-foaming agent than the component (C1) as the anti-foaming agent (C).
- Examples of the other anti-foaming agent than the component (C1) include fatty acid derivatives such as alkenylsuccinic acid derivatives, etc.; alcohols and derivatives thereof such as o-hydroxybenzyl alcohols, etc.; esters of polyhydroxy-aliphatic alcohols and long-chain fatty acids; etc.
- the other anti-foaming agent than the component (C1) may be used singly or two or more thereof may be used in combination.
- the content ratio of the component (C1) in the component (C) is, from the viewpoint of providing the lubricating oil composition having improved anti-foaming performance and vapor releasing performance, preferably 70 to 100% by mass based on the total amount (100% by mass) of the component (C), more preferably 80 to 100% by mass, even more preferably 90 to 100% by mass, further more preferably 95 to 100% by mass.
- the component (C) does not substantially contain a silicone-based anti-foaming agent.
- a lubricating oil composition containing a silicone-based anti-foaming agent formed foam is difficult to disappear, and therefore, the composition is problematic in point of vapor releasing performance.
- the lubricating oil composition of the type is poor in vapor releasing performance, air is difficult to be removed therefrom, and owing to the presence of air therein, oxidation of the lubricating oil composition proceeds, whereby shortening of the lifetime thereof is likely to be caused.
- the content of a silicone-based anti-foaming agent is preferably as small as possible.
- the content of a silicone-based anti-foaming agent is, based on the total amount (100% by mass) of the component (C), preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 1% by mass or less, further more preferably 0.1% by mass or less, especially preferably less than 0.01% by mass.
- the content of the component (C) is, based on the total amount (100% by mass) of the lubricating oil composition, preferably 0.0001 to 5% by mass, more preferably 0.0002 to 3% by mass, even more preferably 0.0003 to 1% by mass, further more preferably 0.0004 to 0.1% by mass.
- the component (C) may be blended in the form of a solution thereof dissolved in a diluent oil, and regarding the definition thereof, the content of the component (C) means an active ingredient-equivalent (resin content-equivalent) content thereof excluding the diluent oil.
- the lubricating oil composition of one aspect of the present invention further contains an antioxidant (D) containing an amine-based antioxidant (D1) from the viewpoint of further improving the antioxidation performance thereof.
- the amine-based antioxidant (D1) may be used singly or two or more thereof may be used in combination.
- the amine-based antioxidant (D1) may be any antioxidant having at least one or more amino groups, and is preferably a monoamine-based antioxidant having one amino group alone.
- the monoamine-based antioxidant is preferably a compound represented by the following general formula (d-1): R A -NH-R B (d-1)
- R A and R B each independently represent an aryl group having 6 to 18 ring carbon atoms and optionally substituted with an alkyl group having 1 to 20 carbon atoms.
- aryl group examples include a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, an anthryl group, a fluorenyl group, etc.
- a phenyl group or a naphthyl group is preferred.
- the alkyl group that may be substituted on the aryl group includes the same ones as the alkyl groups each having 1 to 20 carbon atoms among the alkyl groups that the above-mentioned alkylbenzene (B) may have.
- the carbon number of the alkyl group is preferably 4 to 18, more preferably 6 to 16, even more preferably 8 to 14.
- the amine-based antioxidant (D1) contains a diphenylamine compound (D11) and a phenyl-naphthylamine compound (D12) from the viewpoint of more improving antioxidation performance.
- the total content of the component (D11) and the component (D12) in the component (D1) is, based on the total amount (100% by mass) of the component (D1), preferably 70 to 100% by mass, more preferably 80 to 100% by mass, even more preferably 90 to 100% by mass, further more preferably 95 to 100% by mass.
- the diphenylamine compound (D11) is preferably a compound represented by the following general formula (d-11).
- the phenyl-naphthylamine compound (D12) is preferably one or more selected from a compound represented by the following general formula (d-121) and a compound represented by the following general formula (d-122),
- R 1 to R 8 each independently represent an alkyl group having 1 to 20 (preferably 4 to 18, more preferably 6 to 16, even more preferably 8 to 14) carbon atoms.
- the alkyl group includes the same ones as the alkyl group having 1 to 20 carbon atoms among the alkyl groups that the above-mentioned alkylbenzene (B) may have.
- n1, n2, n3 and n6 each independently represent an integer of 0 to 5, preferably an integer of 0 to 3, more preferably an integer of 0 to 1, even more preferably 1.
- n4 and m7 each independently represent an integer of 0 to 3, preferably an integer of 0 to 1, more preferably 0.
- p5 and p8 each independently represent an integer of 0 to 4, preferably an integer of 0 to 2, more preferably an integer of 0 to 1, even more preferably 0.
- the content ratio of the component (D11) to the component (D12) [D11/D12] is, from the viewpoint of more improving antioxidation performance, preferably 0.1/1 to 1/1, more preferably 0.15/1 to 0.85/1, even more preferably 0.2/1 to 0.7/1, further more preferably 0.25/1 to 0.6/1, by mass ratio.
- the amine-based antioxidant (D1) does not substantially contain a phenylenediamine compound.
- a lubricating oil composition containing a phenylenediamine compound readily forms sludge in long-term use at a high temperature, and therefore, has a tendency that the sludge formation-preventing effect of the alkylbenzene (B) contained therein is unlikely to be exhibited.
- the content of a phenylenediamine compound is preferably as small as possible.
- phenylenediamine compound indicates a compound having one benzene ring, in which at least two hydrogen atoms of the benzene ring each are substituted with an amino group, and includes a compound having any other substituent such as an alkyl group or the like than the amino group in the benzene ring.
- the content of the phenylenediamine compound in the component (D1) is, based on the total amount (100% by mass) of the amine-based antioxidant (D1), preferably 10% by mass or less, more preferably 5% by mass or less, even more preferably 1% by mass or less, further more preferably 0.1% by mass or less, especially preferably less than 0.01% by mass.
- the component (D) may contain any other antioxidant than the amine-based antioxidant (D1).
- the content ratio of the component (D1) in the component (D) is, based on the total amount (100% by mass) of the component (D) contained in the lubricating oil composition, preferably 50 to 100% by mass, more preferably 60 to 100% by mass, even more preferably 70 to 100% by mass, further more preferably 80 to 100% by mass.
- the other antioxidant than the component (D1) is preferably a phenol-based antioxidant (D2).
- phenol-based antioxidant (D2) examples include monocyclic phenol-based compounds such as 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butyl-4-ethylphenol, 2,4,6-tri-t-butylphonol, 2,6-di-t-butyl-4-hydroxymethylphenol, 2,6-di-t-butylphenol, 2,4-dimethyl-6-t-butylphenol, 2,6-di-t-butyl-4-(N,N-dimethylaminomethyl)phenol, 2,6-di-t-amyl-4-methylphenol, n-octadecyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, etc.; and polycyclic phenol-based compounds such as 4,4'-methylene bis(2,6-di-t-butylphenol), 4,4'-isopropylidene bis(2,6-di-t-butyl
- One of these phenol-based antioxidants for (D2) may be used singly or two or more thereof may be used in combination.
- the content of the phenol-based antioxidant (D2) is, relative to 100 parts by mass of the total amount of the amine-based antioxidant (D1), preferably 0.1 to 100 parts by mass, more preferably 0.5 to 60 parts by mass, even more preferably 1.0 to 40 parts by mass, further more preferably 2.0 to 20 parts by mass.
- the content of the component (D) is, based on the total amount (100% by mass) of the lubricating oil composition, 0.01 to 15% by mass, preferably 0.05 to 10% by mass, more preferably 0.10 to 5% by mass, even more preferably 0.20 to 3% by mass.
- the lubricating oil composition of one aspect of the present invention may contain additives for a lubricating oil that may be used in general lubricating oil compositions and do not correspond to the above-mentioned components (A) to (D), within a range not detracting from the advantageous effects of the present invention.
- additives for a lubricating oil include a viscosity index improver, a detergent, a dispersant, a metal deactivator, a pour point depressant, an anti-wear agent, a friction regulator, an extreme pressure agent, a rust inhibitor, etc.
- One of these additives may be used singly or two or more thereof may be used in combination.
- the content of each additive for a lubricating oil is, based on the total amount (100% by mass) of the lubricating oil composition, preferably 0.001 to 10% by mass, more preferably 0.005 to 7% by mass, even more preferably 0.01 to 5% by mass, further more preferably 0.05 to 2% by mass.
- the lubricating oil composition of the present invention may be produced by blending a refined paraffinic mineral oil (A) and an alkylbenzene (B) having a flash point of 160 to 220°C.
- a mineral oil or a synthetic oil, the above-mentioned anti-foaming agent (C) and antioxidant (D) and the above-mentioned additives for a lubricating oil, not corresponding to the components (A) and (B) may be blended along with the components (A) and (B).
- the blending amount of each component is as mentioned above.
- the components are stirred and uniformly dispersed according to a known method.
- a lubricating oil composition in which the constituent components are partly denatured or two components react with each other to form a different component after the components have been blended, also falls within the technical scope of the present invention.
- the flash point of the lubricating oil composition of the present invention is 250°C or higher, preferably 253°C or higher, more preferably 255°C or higher, and is preferably 260°C or lower.
- the kinematic viscosity at 40°C of the lubricating oil composition of one aspect of the present invention is preferably 20 to 300 mm 2 /s, more preferably 25 to 200 mm 2 /s, even more preferably 30 to 100 mm 2 /s.
- the viscosity index of the lubricating oil composition of one aspect of the present invention is preferably 115 or more, more preferably 125 or more, even more preferably 135 or more.
- the acid number of the lubricating oil composition of one aspect of the present invention is preferably 1.00 mgKOH/g or less, more preferably 0.50 mgKOH/g or less, even more preferably 0.30 mgKOH/g or less, further more preferably 0.12 mgKOH/g or less.
- the base number of the lubricating oil composition of one aspect of the present invention is preferably 1.00 mgKOH/g or less, more preferably 0.50 mgKOH/g or less, even more preferably 0.30 mgKOH/g or less, further more preferably 0.10 mgKOH/g or less.
- the base number means a value measured according to the hydrochloric acid method of JIS K2501.
- the density at 15°C of the lubricating oil composition of one aspect of the present invention is preferably 0.800 to 0.930 g/cm 3 , more preferably 0.810 to 0.900 g/cm 3 , even more preferably 0.820 to 0.880 g/cm 3 .
- the pour point of the lubricating oil composition of one aspect of the present invention is preferably 0°C or lower, more preferably -5°C or lower, even more preferably -10°C or lower, further more preferably -15°C or lower.
- the time (RBOT value) taken until the pressure has lowered from the highest pressure by 175 kPa is preferably 1800 minutes or more, more preferably 2000 minutes or more, even more preferably 2200 minutes or more, further more preferably 2400 minutes or more.
- the time taken until the RPVOT (rotating pressure vessel oxidation test) value thereof according to ASTM D2272 has reached 25% of the RPVOT value before the test is preferably 1400 hours or more, more preferably 1500 hours or more, even more preferably 1600 hours or more, further more preferably 1800 hours or more.
- the sludge formation amount during the time is, when measured through a membrane filter by Merck Millipore Corporation having a mean pore size of 1.0 ⁇ m, is preferably 7.0 mg/100 ml or less, more preferably 5.0 mg/100 ml or less, even more preferably 4.0 mg/100 ml or less.
- the time taken until the disappearance of foams is preferably shorter than 3.5 minutes, more preferably shorter than 3.0 minutes, even more preferably shorter than 2.5 minutes, and further more preferably shorter than 2.0 minutes.
- the time taken until the emulsified layer has reached 3 mL is preferably shorter than 10 minutes, more preferably shorter than 8 minutes, even more preferably shorter than 6 minutes.
- the lubricating oil composition of one aspect of the present invention can be used as a turbine oil for use for lubrication of various turbines such as steam turbines, nuclear turbines, gas turbines, hydropower turbines, etc.; a bearing oil, a gear oil, or a hydraulic oil for control systems for use for lubrication of various turbomachines such as blowers, compressors, etc.; and further as a hydraulic fluid, or a lubricating oil for internal combustion engines, etc.
- the lubricating oil composition of the present invention is favorably used for lubrication of various turbines, various turbomachines, hydraulic machines, etc.
- the present invention provides a lubricating method which includes using the above-mentioned lubricating oil composition, that is, "a lubricating method which includes using the lubricating oil composition as defined in claim 1".
- GPC gel permeation chromatography
- Density at 15°C was measured according to JIS K2249-1.
- Polyacrylate-based anti-foaming agent (1) solution having a resin concentration of 1% by mass, prepared by diluting polymethacrylate having Mw of 48000 with light oil.
- Polyacrylate-based anti-foaming agent (2) polymethacrylate having Mw of 51000.
- Silicone-based anti-foaming agent solution having a resin concentration of 1% by mass, prepared by diluting polydimethylsilicone having a kinematic viscosity at 25°C of 12500 mm 2 /s with light oil.
- Amine-based antioxidant (1) dioctyldiphenylamine (compound of the above general formula (d-11) where R 1 and R 2 are octyl groups, and n1 and n2 are 1), corresponding to the diphenylamine compound (D11).
- Amine-based antioxidant (2) p-t-octylphenyl-1-naphthylamine (compound of the above general formula (d-122) where R 6 is a t-octyl group, n6 is 1, and m7 and p8 are 0), corresponding to the phenyl-naphthylamine compound (D12).
- Phenol-based antioxidant diethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate.
- RBOT rotary bomb oxidation test
- the sludge formation amount was measured using a membrane filter by Merck Millipore Corporation having a mean pore size of 1.0 ⁇ m according to ASTM D7873.
- the lubricating oil compositions (I) to (III) produced in Examples 1 to 3 have a high flash point of 250°C or higher, and have an excellent long lifetime to such an extent that they can maintain excellent oxidation stability even in long-term use in high-temperature environments.
- the lubricating oil compositions (I) to (III) are excellent also in vapor releasing performance and water releasing performance.
- the lubricating oil compositions (IV) and (V) produced in Comparative Examples 1 and 2 have a low flash point of lower than 250°C, and regarding the oxidation stability thereof, they are all inferior to the lubricating oil compositions (I) to (III).
- the lubricating oil composition of the present invention has a high flash point of 250°C or higher and has an excellent long lifetime to such an extent that the lubricating oil composition can maintain excellent oxidation stability even in long-term use in high-temperature environments.
- the lubricating oil composition of one aspect of the present invention can be favorably used, for example, for turbine oils, compressor oils, hydraulic oils, etc.
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015222705A JP6737450B2 (ja) | 2015-11-13 | 2015-11-13 | 潤滑油組成物、及び潤滑方法 |
| PCT/JP2016/077632 WO2017081941A1 (ja) | 2015-11-13 | 2016-09-20 | 潤滑油組成物、及び潤滑方法 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3375852A1 EP3375852A1 (en) | 2018-09-19 |
| EP3375852A4 EP3375852A4 (en) | 2019-04-03 |
| EP3375852B1 true EP3375852B1 (en) | 2021-08-18 |
Family
ID=58695113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16863905.2A Active EP3375852B1 (en) | 2015-11-13 | 2016-09-20 | Lubricant composition and lubricating method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20180327689A1 (ja) |
| EP (1) | EP3375852B1 (ja) |
| JP (1) | JP6737450B2 (ja) |
| CN (1) | CN108350387B (ja) |
| WO (1) | WO2017081941A1 (ja) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL298771A (en) * | 2020-07-08 | 2023-02-01 | Mat Engineering And Technical Support Services Corp | A lubricant composition that includes a non-silicone-based anti-foaming agent |
| WO2023189764A1 (ja) * | 2022-03-30 | 2023-10-05 | 出光興産株式会社 | 潤滑油組成物並びに引火点向上剤及び引火点向上方法 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS494107B1 (ja) * | 1970-07-08 | 1974-01-30 | ||
| JPS5159781A (ja) * | 1974-11-22 | 1976-05-25 | Matsumura Sekiyu Kenkyusho | Teionyosadoyu |
| JPS58225196A (ja) * | 1982-06-24 | 1983-12-27 | Nippon Mining Co Ltd | デイ−ゼルエンジン用潤滑油 |
| JP4028614B2 (ja) * | 1997-02-03 | 2007-12-26 | 東燃ゼネラル石油株式会社 | 潤滑油組成物 |
| JP2000096071A (ja) * | 1998-09-21 | 2000-04-04 | Nippon Mitsubishi Oil Corp | ジメチルエーテルを冷媒とする冷凍機用潤滑油 |
| JP5108200B2 (ja) * | 2003-11-04 | 2012-12-26 | 出光興産株式会社 | 潤滑油基油及びその製造方法、並びに該基油を含有する潤滑油組成物 |
| US20060105920A1 (en) * | 2004-11-16 | 2006-05-18 | Dalman David A | Performance-enhancing additives for lubricating oils |
| JP5249492B2 (ja) * | 2005-08-31 | 2013-07-31 | 出光興産株式会社 | 油圧作動油組成物 |
| JP2008013677A (ja) * | 2006-07-06 | 2008-01-24 | Nippon Oil Corp | 冷凍機油 |
| US8193129B2 (en) * | 2006-07-06 | 2012-06-05 | Nippon Oil Corporation | Refrigerator oil, compressor oil composition, hydraulic fluid composition, metalworking fluid composition, heat treatment oil composition, lubricant composition for machine tool and lubricant composition |
| JP5185584B2 (ja) * | 2006-10-17 | 2013-04-17 | 昭和シェル石油株式会社 | 潤滑油組成物及びその製造方法 |
| JP5352053B2 (ja) * | 2007-01-23 | 2013-11-27 | 出光興産株式会社 | 油冷式スクリュー空気圧縮機用潤滑油組成物およびこれを充填した油冷式スクリュー空気圧縮機 |
| JP5231053B2 (ja) * | 2008-03-14 | 2013-07-10 | Ｊｘ日鉱日石エネルギー株式会社 | 潤滑油組成物 |
| JP5800449B2 (ja) * | 2008-03-25 | 2015-10-28 | Ｊｘ日鉱日石エネルギー株式会社 | 潤滑油基油及びその製造方法並びに潤滑油組成物 |
| IN2014DN06761A (ja) * | 2012-03-02 | 2015-05-22 | Jx Nippon Oil & Energy Corp | |
| CN105026536A (zh) * | 2013-03-15 | 2015-11-04 | 特灵国际有限公司 | 润滑剂消泡添加剂及组合物 |
| WO2014156338A1 (ja) * | 2013-03-29 | 2014-10-02 | 出光興産株式会社 | 潤滑油組成物 |
-
2015
- 2015-11-13 JP JP2015222705A patent/JP6737450B2/ja active Active
-
2016
- 2016-09-20 CN CN201680066103.5A patent/CN108350387B/zh active Active
- 2016-09-20 EP EP16863905.2A patent/EP3375852B1/en active Active
- 2016-09-20 US US15/774,803 patent/US20180327689A1/en not_active Abandoned
- 2016-09-20 WO PCT/JP2016/077632 patent/WO2017081941A1/ja active Application Filing
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3375852A1 (en) | 2018-09-19 |
| CN108350387A (zh) | 2018-07-31 |
| JP2017088778A (ja) | 2017-05-25 |
| EP3375852A4 (en) | 2019-04-03 |
| US20180327689A1 (en) | 2018-11-15 |
| JP6737450B2 (ja) | 2020-08-12 |
| WO2017081941A1 (ja) | 2017-05-18 |
| CN108350387B (zh) | 2021-08-10 |
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