JPWO2019160123A1 - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
- Publication number
- JPWO2019160123A1 JPWO2019160123A1 JP2019572303A JP2019572303A JPWO2019160123A1 JP WO2019160123 A1 JPWO2019160123 A1 JP WO2019160123A1 JP 2019572303 A JP2019572303 A JP 2019572303A JP 2019572303 A JP2019572303 A JP 2019572303A JP WO2019160123 A1 JPWO2019160123 A1 JP WO2019160123A1
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- Japan
- Prior art keywords
- lubricating oil
- group
- oil composition
- mass
- 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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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 135
- 239000000203 mixture Substances 0.000 title claims abstract description 127
- -1 polyol ester Chemical class 0.000 claims abstract description 100
- 239000002480 mineral oil Substances 0.000 claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 35
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 34
- 229920001515 polyalkylene glycol Polymers 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920005862 polyol Polymers 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims description 26
- 230000003078 antioxidant effect Effects 0.000 claims description 22
- 125000004429 atom Chemical group 0.000 claims description 21
- 150000001412 amines Chemical class 0.000 claims description 18
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 230000002378 acidificating effect Effects 0.000 claims description 9
- 125000004437 phosphorous atom Chemical group 0.000 claims description 9
- 230000007935 neutral effect Effects 0.000 claims description 6
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 238000004945 emulsification Methods 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- 150000003018 phosphorus compounds Chemical class 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 23
- 238000001556 precipitation Methods 0.000 abstract description 20
- 125000004432 carbon atom Chemical group C* 0.000 description 76
- 125000000217 alkyl group Chemical group 0.000 description 49
- 150000001875 compounds Chemical group 0.000 description 35
- 239000010802 sludge Substances 0.000 description 31
- 125000001183 hydrocarbyl group Chemical group 0.000 description 25
- 239000002199 base oil Substances 0.000 description 22
- 150000002148 esters Chemical class 0.000 description 20
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 16
- 125000000623 heterocyclic group Chemical group 0.000 description 16
- 230000001590 oxidative effect Effects 0.000 description 16
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 13
- 229910052698 phosphorus Inorganic materials 0.000 description 13
- 239000000654 additive Substances 0.000 description 12
- 125000003118 aryl group Chemical group 0.000 description 12
- 125000002947 alkylene group Chemical group 0.000 description 11
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 9
- 125000002252 acyl group Chemical group 0.000 description 9
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 7
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 7
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 7
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 7
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 6
- 125000003342 alkenyl group Chemical group 0.000 description 6
- 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 6
- 238000005259 measurement Methods 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 6
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical class [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 5
- 125000003710 aryl alkyl group Chemical group 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 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 5
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 4
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005227 gel permeation chromatography Methods 0.000 description 4
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 230000001976 improved effect Effects 0.000 description 4
- 125000001624 naphthyl group Chemical group 0.000 description 4
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000004430 oxygen atom Chemical group O* 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- 238000013112 stability test Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 125000004434 sulfur atom Chemical group 0.000 description 4
- 238000012065 two one-sided test Methods 0.000 description 4
- 239000004711 α-olefin Substances 0.000 description 4
- 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 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 125000006267 biphenyl group Chemical group 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 3
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 3
- 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 3
- 239000002530 phenolic antioxidant Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 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 3
- 125000001424 substituent group Chemical group 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- RAOIDOHSFRTOEL-UHFFFAOYSA-N tetrahydrothiophene Chemical compound C1CCSC1 RAOIDOHSFRTOEL-UHFFFAOYSA-N 0.000 description 3
- 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 3
- 239000001993 wax Substances 0.000 description 3
- 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 2
- 125000004806 1-methylethylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- XDOFQFKRPWOURC-UHFFFAOYSA-N 16-methylheptadecanoic acid Chemical compound CC(C)CCCCCCCCCCCCCCC(O)=O XDOFQFKRPWOURC-UHFFFAOYSA-N 0.000 description 2
- 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
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- SXJBHJCKWQIWHA-UHFFFAOYSA-N 2-ethyl-2,3,3-trimethylbutanoic acid Chemical compound CCC(C)(C(O)=O)C(C)(C)C SXJBHJCKWQIWHA-UHFFFAOYSA-N 0.000 description 2
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- KEMQGTRYUADPNZ-UHFFFAOYSA-N heptadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(O)=O KEMQGTRYUADPNZ-UHFFFAOYSA-N 0.000 description 2
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 150000002763 monocarboxylic acids Chemical class 0.000 description 2
- 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 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 2
- 125000005561 phenanthryl group Chemical group 0.000 description 2
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 2
- SZHOJFHSIKHZHA-UHFFFAOYSA-N tridecanoic acid Chemical compound CCCCCCCCCCCCC(O)=O SZHOJFHSIKHZHA-UHFFFAOYSA-N 0.000 description 2
- 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 2
- ZDPHROOEEOARMN-UHFFFAOYSA-N undecanoic acid Chemical compound CCCCCCCCCCC(O)=O ZDPHROOEEOARMN-UHFFFAOYSA-N 0.000 description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 2
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 1
- 125000004815 1,2-dimethylethylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([*:2])C([H])([H])[H] 0.000 description 1
- 125000004812 1-ethylethylene group Chemical group [H]C([H])([H])C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- ZONJATNKKGGVSU-UHFFFAOYSA-N 14-methylpentadecanoic acid Chemical compound CC(C)CCCCCCCCCCCCC(O)=O ZONJATNKKGGVSU-UHFFFAOYSA-N 0.000 description 1
- MFJCPDOGFAYSTF-UHFFFAOYSA-N 1H-isochromene Chemical compound C1=CC=C2COC=CC2=C1 MFJCPDOGFAYSTF-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
- NPMHELYJLOUPIZ-UHFFFAOYSA-N 2,2,3,4-tetramethylpentanoic acid Chemical compound CC(C)C(C)C(C)(C)C(O)=O NPMHELYJLOUPIZ-UHFFFAOYSA-N 0.000 description 1
- VUAXHMVRKOTJKP-UHFFFAOYSA-N 2,2-dimethylbutyric acid Chemical compound CCC(C)(C)C(O)=O VUAXHMVRKOTJKP-UHFFFAOYSA-N 0.000 description 1
- IKNDGHRNXGEHTO-UHFFFAOYSA-N 2,2-dimethyloctanoic acid Chemical compound CCCCCCC(C)(C)C(O)=O IKNDGHRNXGEHTO-UHFFFAOYSA-N 0.000 description 1
- OWEMTCOXFULTNW-UHFFFAOYSA-N 2,3-dimethyl-2-propan-2-ylbutanoic acid Chemical compound CC(C)C(C)(C(C)C)C(O)=O OWEMTCOXFULTNW-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
- 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
- KXZLHMICGMACLR-UHFFFAOYSA-N 2-(hydroxymethyl)-2-pentylpropane-1,3-diol Chemical compound CCCCCC(CO)(CO)CO KXZLHMICGMACLR-UHFFFAOYSA-N 0.000 description 1
- SZSSMFVYZRQGIM-UHFFFAOYSA-N 2-(hydroxymethyl)-2-propylpropane-1,3-diol Chemical compound CCCC(CO)(CO)CO SZSSMFVYZRQGIM-UHFFFAOYSA-N 0.000 description 1
- PKKMTXYTMIUYND-UHFFFAOYSA-N 2-[[3-hydroxy-2-(hydroxymethyl)-2-methylpropoxy]methyl]-2-methylpropane-1,3-diol Chemical compound OCC(C)(CO)COCC(C)(CO)CO PKKMTXYTMIUYND-UHFFFAOYSA-N 0.000 description 1
- UXGVMFHEKMGWMA-UHFFFAOYSA-N 2-benzofuran Chemical compound C1=CC=CC2=COC=C21 UXGVMFHEKMGWMA-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- HJIYDQCBJVTQAO-UHFFFAOYSA-N 2-butyl-2-(hydroxymethyl)propane-1,3-diol Chemical compound CCCCC(CO)(CO)CO HJIYDQCBJVTQAO-UHFFFAOYSA-N 0.000 description 1
- VNAWKNVDKFZFSU-UHFFFAOYSA-N 2-ethyl-2-methylpropane-1,3-diol Chemical compound CCC(C)(CO)CO VNAWKNVDKFZFSU-UHFFFAOYSA-N 0.000 description 1
- 125000006176 2-ethylbutyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(C([H])([H])*)C([H])([H])C([H])([H])[H] 0.000 description 1
- QERPRBXFYXTKDD-UHFFFAOYSA-N 2-hexyl-2-(hydroxymethyl)propane-1,3-diol Chemical compound CCCCCCC(CO)(CO)CO QERPRBXFYXTKDD-UHFFFAOYSA-N 0.000 description 1
- JTMBCYAUSCBSEY-UHFFFAOYSA-N 2-methyl-2-sulfanylpropanoic acid Chemical compound CC(C)(S)C(O)=O JTMBCYAUSCBSEY-UHFFFAOYSA-N 0.000 description 1
- JBIJLHTVPXGSAM-UHFFFAOYSA-N 2-naphthylamine Chemical compound C1=CC=CC2=CC(N)=CC=C21 JBIJLHTVPXGSAM-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
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Classifications
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- 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
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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
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
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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
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
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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
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/32—Esters
- C10M105/38—Esters of polyhydroxy compounds
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
- C10M107/30—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M107/32—Condensation polymers of aldehydes or ketones; Polyesters; Polyethers
- C10M107/34—Polyoxyalkylenes
-
- 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
- C10M111/04—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 macromolecular organic compound
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—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
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/08—Ammonium or amine salts
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
- C10M137/105—Thio derivatives not containing metal
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/003—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions 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
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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Abstract
鉱油（Ａ）と、ポリアルキレングリコール（Ｂ１）及びポリオールエステル（Ｂ２）を含む合成油（Ｂ）とを含有する潤滑油組成物であって、鉱油（Ａ）の含有量が、前記潤滑油組成物の全量基準で、５〜９５質量％であり、ターボ機械、圧縮機、油圧機器、又は工作機械に用いられ、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高く、優れた水分離性を有する、ターボ機械、圧縮機、油圧機器、又は工作機械に用いられる潤滑油組成物を提供する。A lubricating oil composition containing a mineral oil (A) and a synthetic oil (B) containing a polyalkylene glycol (B1) and a polyol ester (B2), wherein the content of the mineral oil (A) is the lubricating oil composition. Based on the total amount of goods, it is 5 to 95% by mass, and is used in turbo machines, compressors, hydraulic equipment, or machine tools. Provided is a lubricating oil composition used in a turbo machine, a compressor, a hydraulic device, or a machine tool, which has a high effect of suppressing precipitation and has excellent water separability.
Description
本発明は、ターボ機械、圧縮機、油圧機器、又は工作機械に用いられる潤滑油組成物、及び当該潤滑油組成物の使用方法に関する。 The present invention relates to a lubricating oil composition used in a turbomachine, a compressor, a hydraulic device, or a machine tool, and a method of using the lubricating oil composition.
蒸気タービン、ガスタービン等の各種ターボ機械や、回転式ガス圧縮機、往復動式圧縮機等の圧縮機、油圧機器、及び工作機械の油圧ユニット等の機器に用いられる潤滑油組成物は、高温環境下の系内を長期間循環しながら使用されることがある。
潤滑油組成物は、高温環境下で長期間使用されることで、酸化劣化に伴うスラッジが析出し易くなる。析出したスラッジは、例えば、回転体の軸受に付着し発熱することによる軸受の損傷や、循環ライン中に設けられたフィルタの目詰まりの発生、制御バルブに堆積することによる制御系統の作動不良等の問題を引き起こすことがある。
そのため、高温環境下の系内を長時間循環しながら使用される潤滑油組成物には、スラッジ析出の抑制効果の向上が求められている。Lubricating oil compositions used in various turbomachines such as steam turbines and gas turbines, compressors such as rotary gas compressors and reciprocating compressors, hydraulic equipment, and equipment such as hydraulic units of machine tools have high temperatures. It may be used while circulating in the system under the environment for a long period of time.
When the lubricating oil composition is used for a long period of time in a high temperature environment, sludge due to oxidative deterioration tends to precipitate. The deposited sludge adheres to the bearing of the rotating body and generates heat, for example, damage to the bearing, clogging of the filter provided in the circulation line, malfunction of the control system due to accumulation on the control valve, etc. May cause problems.
Therefore, a lubricating oil composition used while circulating in a system in a high temperature environment for a long time is required to improve the effect of suppressing sludge precipitation.
例えば、特許文献１には、ポリグリコール系合成油とエステル系合成油の混合油である合成基油と、非対称型ジフェニルアミン系化合物等の特定の化合物群から選択される１以上のアミン系酸化防止剤とを含有する空気圧縮機用潤滑油組成物が開示されている。
特許文献１によれば、当該空気圧縮機用潤滑油組成物は、酸化を適切に抑制しつつ、スラッジの析出が抑制できる旨の結果が示されている。For example, Patent Document 1 describes one or more amine-based antioxidants selected from a specific compound group such as a synthetic base oil which is a mixed oil of a polyglycol-based synthetic oil and an ester-based synthetic oil, and an asymmetric diphenylamine-based compound. A lubricating oil composition for an air compressor containing an agent is disclosed.
According to Patent Document 1, it is shown that the lubricating oil composition for an air compressor can suppress the precipitation of sludge while appropriately suppressing the oxidation.
ところで、水や水蒸気が混入する恐れのある、タービン等の機器に使用される潤滑油組成物は、水や水蒸気の混入によって乳化することにより、機器のトラブルを引き起こす要因となる。
このため、このような機器に使用される潤滑油組成物には、乳化し難く、また乳化しても水と分離しやすい性質、すなわち、水分離性に優れていることが求められる。
なお、特許文献１においては、潤滑油組成物の水分離性に関する検討は行われていない。By the way, the lubricating oil composition used for equipment such as turbines, which may be mixed with water or water vapor, becomes a factor that causes troubles of the equipment by emulsification due to the mixing of water or water vapor.
Therefore, the lubricating oil composition used in such an apparatus is required to have a property of being difficult to emulsify and easily separating from water even if emulsified, that is, having excellent water separability.
In Patent Document 1, the water separability of the lubricating oil composition has not been studied.
本発明は、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高く、優れた水分離性を有する、ターボ機械、圧縮機、油圧機器、又は工作機械に用いられる潤滑油組成物を提供することを目的とする。 The present invention is a turbomachine, a compressor, a hydraulic device, or a machine tool, which has excellent oxidative stability, a high sludge precipitation suppressing effect, and excellent water separability even when used for a long period of time in a high temperature environment. It is an object of the present invention to provide a lubricating oil composition used in a machine tool.
本発明者らは、所定量の鉱油と、ポリアルキレングリコール（以下、「ＰＡＧ」ともいう）及びポリオールエステル（以下、「ＰＯＥ」ともいう）を含む合成油との組み合わせからなる混合基油を含有する潤滑油組成物が、上記課題を解決し得ることを見出し、本発明を完成させた。
すなわち、本発明は、下記〔１〕及び〔２〕を提供する。
〔１〕鉱油（Ａ）と、ポリアルキレングリコール（Ｂ１）及びポリオールエステル（Ｂ２）を含む合成油（Ｂ）とを含有する潤滑油組成物であって、
鉱油（Ａ）の含有量が、前記潤滑油組成物の全量基準で、５〜９５質量％であり、
ターボ機械、圧縮機、油圧機器、又は工作機械に用いられる、潤滑油組成物。
〔２〕上記〔１〕に記載の潤滑油組成物を、ターボ機械、圧縮機、油圧機器、又は工作機械に用いる、潤滑油組成物の使用方法。The present inventors contain a mixed base oil composed of a combination of a predetermined amount of mineral oil and a synthetic oil containing polyalkylene glycol (hereinafter, also referred to as “PAG”) and a polyol ester (hereinafter, also referred to as “POE”). The present invention has been completed by finding that the lubricating oil composition to be used can solve the above problems.
That is, the present invention provides the following [1] and [2].
[1] A lubricating oil composition containing a mineral oil (A) and a synthetic oil (B) containing a polyalkylene glycol (B1) and a polyol ester (B2).
The content of the mineral oil (A) is 5 to 95% by mass based on the total amount of the lubricating oil composition.
Lubricating oil composition used in turbomachinery, compressors, hydraulic equipment, or machine tools.
[2] A method for using a lubricating oil composition, wherein the lubricating oil composition according to the above [1] is used for a turbomachine, a compressor, a hydraulic device, or a machine tool.
本発明の潤滑油組成物は、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高く、優れた水分離性を有する。そのため、当該潤滑油組成物は、ターボ機械、圧縮機、油圧機器、又は工作機械への使用に適している。 The lubricating oil composition of the present invention has excellent oxidative stability, a high sludge precipitation suppressing effect, and excellent water separability even when used for a long period of time in a high temperature environment. Therefore, the lubricating oil composition is suitable for use in turbomachinery, compressors, hydraulic equipment, or machine tools.
以下の本明細書において、動粘度及び粘度指数は、ＪＩＳ Ｋ２２８３：２０００に準拠して測定及び算出した値を意味する。
リン原子、金属原子の含有量は、ＪＰＩ−５Ｓ−３８−９２に準拠して測定した値を意味する。
窒素原子の含有量は、ＪＩＳ Ｋ２６０９に準拠して測定した値を意味する。In the following specification, kinematic viscosity and viscosity index mean values measured and calculated in accordance with JIS K2283: 2000.
The content of phosphorus atom and metal atom means a value measured according to JPI-5S-38-92.
The content of nitrogen atom means a value measured according to JIS K2609.
〔潤滑油組成物〕
本発明の潤滑油組成物は、ターボ機械、圧縮機、油圧機器、又は工作機械に用いられるものであって、鉱油（Ａ）と、ポリアルキレングリコール（ＰＡＧ）（Ｂ１）及びポリオールエステル（ＰＯＥ）（Ｂ２）を含む合成油（Ｂ）とを含有する。
本発明の潤滑油組成物では、基油として、鉱油（Ａ）と共に、ＰＡＧ及びＰＯＥを含む合成油とを併用した混合基油を用いることで、高温環境下で長時間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高く、優れた水分離性を有するものとなり得る。[Lubricating oil composition]
The lubricating oil composition of the present invention is used in turbomachinery, compressors, hydraulic equipment, or machine tools, and includes mineral oil (A), polyalkylene glycol (PAG) (B1), and polyol ester (POE). Contains synthetic oil (B) containing (B2).
In the lubricating oil composition of the present invention, by using a mixed base oil in which a mineral oil (A) and a synthetic oil containing PAG and POE are used in combination as the base oil, even when used for a long time in a high temperature environment. , It has excellent oxidative stability, has a high effect of suppressing sludge precipitation, and can have excellent water separability.
鉱油は、水分離性に優れているが、高温環境下での酸化安定性が劣り、劣化物を生じ易く、その劣化物はスラッジとして析出し、装置の不具合を生じさせる原因となる。
ＰＡＧは、高温環境下で発生し得る劣化物を溶解して、その劣化物がスラッジとして析出するのを抑制し得るという性質を有しているが、水分離性に問題がある。また、極性が高過ぎるため，鉱油等の非極性基油との相溶性に劣るため、鉱油とＰＡＧの混合基油では、互いの欠点を補い合うような性能を発揮することは難しい。
一方で、ＰＯＥは、高温環境下で発生し得る劣化物の溶解性の点ではＰＡＧに比べて劣るが、他の基油との相溶性に優れるという性質を有するため、ＰＡＧ及び鉱油の双方に対して相溶性が良好である。なお、ＰＯＥも、水分離性には問題がある。
そのため、本発明では、鉱油、ＰＡＧ、及びＰＯＥの３種の基油を組み合わせることで、「鉱油」の水分離性に優れているという特性と、「ＰＡＧ」の高温環境下で生じ得る劣化物を溶解し得るという特性とを共にバランスよく発現させ得る潤滑油組成物とすることができる。Mineral oil is excellent in water separability, but is inferior in oxidative stability in a high temperature environment and easily produces deteriorated substances, which are precipitated as sludge, which causes equipment malfunction.
PAG has a property of dissolving a deteriorated product that can be generated in a high temperature environment and suppressing the precipitation of the deteriorated product as sludge, but there is a problem in water separability. Further, since the polarity is too high, the compatibility with non-polar base oil such as mineral oil is inferior, so that it is difficult for the mixed base oil of mineral oil and PAG to exhibit the performance of compensating for each other's shortcomings.
On the other hand, POE is inferior to PAG in terms of solubility of deteriorated products that can occur in a high temperature environment, but has excellent compatibility with other base oils, so that it is suitable for both PAG and mineral oil. On the other hand, the compatibility is good. POE also has a problem in water separability.
Therefore, in the present invention, by combining three types of base oils, mineral oil, PAG, and POE, the characteristic of "mineral oil" being excellent in water separability and the deterioration product that can occur in the high temperature environment of "PAG". It is possible to obtain a lubricating oil composition capable of exhibiting the property of being able to dissolve the oil in a well-balanced manner.
なお、ＰＡＧ及びＰＯＥを含むが、鉱油を含まない基油を用いた場合、水分離性に問題があり、さらに添加剤を配合すると水分離性は低下する傾向にある。
一方で、鉱油及びＰＯＥを含むが、ＰＡＧを含まない基油を用いた場合、高温環境下で発生し得る劣化物の溶解性の点では、ＰＡＧ単独で用いた場合に比べて劣る。
さらに、鉱油及びＰＡＧを含むが、ＰＯＥを含まない基油を用いた場合、鉱油とＰＡＧとの相溶性が悪いため、鉱油が持つ特性と、ＰＡＧが持つ特性が、発現され難い。
つまり、本発明では、鉱油、ＰＡＧ、及びＰＯＥの三種の基油を併用しているため、それぞれが有する利点を生かしつつ、各基油のデメリットは他の基油で補うことが可能となる。
その結果、本発明の潤滑油組成物は、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高く、優れた水分離性を有する。When a base oil containing PAG and POE but not containing mineral oil is used, there is a problem in water separability, and when an additive is further added, the water separability tends to decrease.
On the other hand, when a base oil containing mineral oil and POE but not containing PAG is used, the solubility of deteriorated products that can occur in a high temperature environment is inferior to that when PAG alone is used.
Further, when a base oil containing mineral oil and PAG but not containing POE is used, the compatibility between the mineral oil and PAG is poor, so that the characteristics of the mineral oil and the characteristics of PAG are difficult to be expressed.
That is, in the present invention, since the three types of base oils of mineral oil, PAG, and POE are used in combination, the disadvantages of each base oil can be supplemented with other base oils while making the best use of the advantages of each.
As a result, the lubricating oil composition of the present invention has excellent oxidative stability, a high sludge precipitation suppressing effect, and excellent water separability even when used for a long period of time in a high temperature environment.
なお、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高い潤滑油組成物とする観点から、本発明の一態様の潤滑油組成物は、さらにアミン系酸化防止剤（Ｃ１）を含む酸化防止剤（Ｃ）を含有することが好ましい。
また、耐摩耗性の向上の観点から、本発明の一態様の潤滑油組成物は、さらに、中性リン酸エステル（Ｄ１）、酸性リン酸エステル（Ｄ２）、及び酸性リン酸エステルのアミン塩（Ｄ３）から選ばれる１種以上のリン系化合物（Ｄ）を含有することが好ましい。
そして、本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、成分（Ｃ）及び（Ｄ）以外の潤滑油用添加剤を含有してもよい。From the viewpoint of providing a lubricating oil composition having excellent oxidative stability and a high effect of suppressing sludge precipitation even when used for a long period of time in a high temperature environment, the lubricating oil composition according to one aspect of the present invention is further used. It is preferable to contain an antioxidant (C) containing an amine-based antioxidant (C1).
Further, from the viewpoint of improving wear resistance, the lubricating oil composition of one aspect of the present invention further comprises a neutral phosphoric acid ester (D1), an acidic phosphoric acid ester (D2), and an amine salt of the acidic phosphoric acid ester. It is preferable to contain one or more phosphorus-based compounds (D) selected from (D3).
The lubricating oil composition of one aspect of the present invention may contain additives for lubricating oil other than the components (C) and (D) as long as the effects of the present invention are not impaired.
本発明の一態様の潤滑油組成物において、成分（Ａ）及び（Ｂ）の合計含有量は、当該潤滑油組成物の全量（１００質量％）基準で、通常６５質量％以上、好ましくは７０質量％以上、より好ましくは８０質量％以上、更に好ましくは９０質量％以上、より更に好ましくは９５質量％以上であり、通常１００質量％以下、好ましくは９９．９質量％以下である。 In the lubricating oil composition of one aspect of the present invention, the total content of the components (A) and (B) is usually 65% by mass or more, preferably 70% based on the total amount (100% by mass) of the lubricating oil composition. It is mass% or more, more preferably 80% by mass or more, further preferably 90% by mass or more, still more preferably 95% by mass or more, and usually 100% by mass or less, preferably 99.9% by mass or less.
本発明の一態様の潤滑油組成物において、成分（Ａ）、（Ｂ）、（Ｃ）及び（Ｄ）の合計含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは７０〜１００質量％、より好ましくは８０〜１００質量％、更に好ましくは９０〜１００質量％、より更に好ましくは９７〜１００質量％である。
以下、本発明の一態様の潤滑油組成物に含まれる各成分について説明する。In the lubricating oil composition of one aspect of the present invention, the total content of the components (A), (B), (C) and (D) is preferably based on the total amount (100% by mass) of the lubricating oil composition. Is 70 to 100% by mass, more preferably 80 to 100% by mass, still more preferably 90 to 100% by mass, and even more preferably 97 to 100% by mass.
Hereinafter, each component contained in the lubricating oil composition of one aspect of the present invention will be described.
＜鉱油（Ａ）＞
本発明で用いる鉱油（Ａ）としては、例えば、パラフィン系原油、中間基系原油、ナフテン系原油等の原油を常圧蒸留して得られる常圧残油；これらの常圧残油を減圧蒸留して得られる留出油；当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、水素化精製等の精製処理を一つ以上施して得られる鉱油；天然ガスからフィッシャー・トロプシュ法等により製造されるワックス（ＧＴＬワックス（Gas To Liquids WAX））を異性化することで得られる鉱油（ＧＴＬ）等が挙げられる。
これらの鉱油は、単独で用いてもよく、２種以上を併用してもよい。
なお、本発明の一態様で用いる鉱油（Ａ）としては、ＡＰＩ（米国石油協会）の基油カテゴリーのグループ２又は３に分類される鉱油が好ましい。<Mineral oil (A)>
The mineral oil (A) used in the present invention is, for example, atmospheric residual oil obtained by atmospheric distillation of crude oil such as paraffin-based crude oil, intermediate base crude oil, and naphthen-based crude oil; these atmospheric residual oils are distilled under reduced pressure. Distillate oil obtained by subjecting the distillate oil to one or more purification treatments such as solvent desorption, solvent extraction, hydrocracking, solvent dewaxing, contact dewaxing, and hydrorefining; Examples thereof include mineral oil (GTL) obtained by isomerizing wax (GTL wax (Gas To Liquids WAX)) produced from natural gas by the Fisher-Tropsch method or the like.
These mineral oils may be used alone or in combination of two or more.
As the mineral oil (A) used in one aspect of the present invention, mineral oils classified into groups 2 or 3 of the base oil category of API (American Petroleum Institute) are preferable.
本発明の一態様で用いる鉱油（Ａ）の４０℃における動粘度としては、好ましくは８〜３５０ｍｍ２／ｓ、より好ましくは１０〜１５０ｍｍ２／ｓ、更に好ましくは１２〜１００ｍｍ２／ｓ、より更に好ましくは１５〜６８ｍｍ２／ｓである。The kinematic viscosity of the mineral oil (A) used in one aspect of the present invention at 40 ° C. is preferably 8 to 350 mm 2 / s, more preferably 10 to 150 mm 2 / s, still more preferably 12 to 100 mm 2 / s. More preferably, it is 15 to 68 mm 2 / s.
また、本発明の一態様で用いる鉱油（Ａ）の粘度指数としては、好ましくは８０以上、より好ましくは９０以上、更に好ましくは１００以上である。 The viscosity index of the mineral oil (A) used in one aspect of the present invention is preferably 80 or more, more preferably 90 or more, and further preferably 100 or more.
本発明の潤滑油組成物において、成分（Ａ）の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、５〜９５質量％であり、好ましくは１０〜９５質量％、より好ましくは２０〜９３質量％、更に好ましくは４０〜９２質量％、より更に好ましくは６０〜９０質量％である。
成分（Ａ）の含有量が５質量％未満であると、水分離性が劣る潤滑油組成物となり、特に、各種添加剤を配合した場合、水分離性の低下の程度はより大きくなる。
一方、成分（Ａ）の含有量が９５質量％超となると、成分（Ｂ１）及び（Ｂ２）の含有量を十分に確保できないため、高温環境下でスラッジが析出し易く、酸化安定性が劣る潤滑油組成物となる。In the lubricating oil composition of the present invention, the content of the component (A) is 5 to 95% by mass, preferably 10 to 95% by mass, based on the total amount (100% by mass) of the lubricating oil composition. It is preferably 20 to 93% by mass, more preferably 40 to 92% by mass, and even more preferably 60 to 90% by mass.
When the content of the component (A) is less than 5% by mass, the lubricating oil composition is inferior in water separability, and in particular, when various additives are blended, the degree of deterioration in water separability becomes larger.
On the other hand, when the content of the component (A) exceeds 95% by mass, the contents of the components (B1) and (B2) cannot be sufficiently secured, so that sludge is likely to precipitate in a high temperature environment and the oxidative stability is inferior. It becomes a lubricating oil composition.
また、本発明の一態様の潤滑油組成物において、成分（Ｂ１）及び成分（Ｂ２）の合計含有量に対する、成分（Ａ）の含有量比〔（Ａ）／（（Ｂ１）＋（Ｂ２））〕は、質量比で、水分離性に優れた潤滑油組成物とする観点から、好ましくは０．０５以上、より好ましくは０．１０以上、より好ましくは０．３０以上、更に好ましくは０．７０以上、より更に好ましくは１．５０以上、特に好ましくは３．５０以上であり、また、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高い潤滑油組成物とする観点から、好ましくは１９．０以下、より好ましくは１５．０以下、より好ましくは１２．０以下である。 Further, in the lubricating oil composition of one aspect of the present invention, the content ratio of the component (A) to the total content of the component (B1) and the component (B2) [(A) / ((B1) + (B2)). )] Is preferably 0.05 or more, more preferably 0.10 or more, more preferably 0.30 or more, still more preferably 0, from the viewpoint of obtaining a lubricating oil composition having excellent water separability in terms of mass ratio. It is .70 or more, more preferably 1.50 or more, particularly preferably 3.50 or more, and also has excellent oxidative stability and an effect of suppressing sludge precipitation even when used for a long period of time in a high temperature environment. From the viewpoint of obtaining a high lubricating oil composition, it is preferably 19.0 or less, more preferably 15.0 or less, and more preferably 12.0 or less.
＜合成油（Ｂ）＞
本発明の潤滑油組成物に含まれる合成油（Ｂ）は、ポリアルキレングリコール（Ｂ１）と、ポリオールエステル（Ｂ２）とを含む。
なお、本発明の一態様で用いる合成油（Ｂ）は、本発明の効果を損なわない範囲で、成分（Ｂ１）及び（Ｂ２）以外の合成油をさらに含有してもよい。
ただし、本発明の一態様の潤滑油組成物において、合成油（Ｂ）中の成分（Ｂ１）及び（Ｂ２）の合計含有量は、当該潤滑油組成物中に含まれる合成油（Ｂ）の全量（１００質量％）基準で、好ましくは７０〜１００質量％、より好ましくは８０〜１００質量％、更に好ましくは９０〜１００質量％、より更に好ましくは９５〜１００質量％である。<Synthetic oil (B)>
The synthetic oil (B) contained in the lubricating oil composition of the present invention contains a polyalkylene glycol (B1) and a polyol ester (B2).
The synthetic oil (B) used in one aspect of the present invention may further contain synthetic oils other than the components (B1) and (B2) as long as the effects of the present invention are not impaired.
However, in the lubricating oil composition of one aspect of the present invention, the total content of the components (B1) and (B2) in the synthetic oil (B) is the synthetic oil (B) contained in the lubricating oil composition. Based on the total amount (100% by mass), it is preferably 70 to 100% by mass, more preferably 80 to 100% by mass, still more preferably 90 to 100% by mass, and even more preferably 95 to 100% by mass.
本発明の一態様の潤滑油組成物において、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高い潤滑油組成物とする観点から、成分（Ｂ１）と成分（Ｂ２）との含有量比〔（Ｂ１）／（Ｂ２）〕は、質量比で、好ましくは１０／９０〜８０／２０、より好ましくは１５／８５〜７０／３０、更に好ましくは２０／８０〜６０／４０、より更に好ましくは２５／７５〜５５／４５である。 The component (B1) of the lubricating oil composition according to one aspect of the present invention is obtained from the viewpoint of providing a lubricating oil composition having excellent oxidative stability and a high sludge precipitation suppressing effect even when used for a long period of time in a high temperature environment. ) And the component (B2) [(B1) / (B2)] in terms of mass ratio, preferably 10/90 to 80/20, more preferably 15/85 to 70/30, still more preferably. It is 20/80 to 60/40, and even more preferably 25/75 to 55/45.
本発明の一態様の潤滑油組成物において、成分（Ｂ）の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、高温環境下で長期間の使用に対しても、酸化安定性に優れ、スラッジ析出の抑制効果が高い潤滑油組成物とする観点から、好ましくは５質量％以上、より好ましくは６質量％以上、更に好ましくは７質量％以上、より更に好ましくは８質量％以上であり、また、水分離性に優れた潤滑油組成物とする観点から、好ましくは９５質量％以下、より好ましくは９０質量％以下、より好ましくは８０質量％以下、更に好ましくは６０質量％以下、より更に好ましくは４０質量％以下、特に好ましくは２０質量％以下である。 In the lubricating oil composition of one aspect of the present invention, the content of the component (B) is based on the total amount (100% by mass) of the lubricating oil composition, and is oxidized even when used for a long period of time in a high temperature environment. From the viewpoint of obtaining a lubricating oil composition having excellent stability and a high sludge precipitation suppressing effect, it is preferably 5% by mass or more, more preferably 6% by mass or more, still more preferably 7% by mass or more, still more preferably 8% by mass. % Or more, and from the viewpoint of obtaining a lubricating oil composition having excellent water separability, preferably 95% by mass or less, more preferably 90% by mass or less, more preferably 80% by mass or less, still more preferably 60% by mass. % Or less, more preferably 40% by mass or less, and particularly preferably 20% by mass or less.
［ポリアルキレングリコール（Ｂ１）］
ポリアルキレングリコール（Ｂ１）としては、例えば、アルキレンオキシドが重合又は共重合して得られる重合体が挙げられる。
なお、ポリアルキレングリコール（Ｂ１）は、単独で用いてもよく、２種以上を併用してもよい。[Polyalkylene glycol (B1)]
Examples of the polyalkylene glycol (B1) include a polymer obtained by polymerizing or copolymerizing an alkylene oxide.
The polyalkylene glycol (B1) may be used alone or in combination of two or more.
本発明の一態様で用いるポリアルキレングリコール（Ｂ１）の数平均分子量（Ｍｎ）としては、潤滑油組成物の粘度指数を向上させる観点から、好ましくは２００〜１０，０００、より好ましくは２４０〜５，０００、更に好ましくは２８０〜３，０００、より更に好ましくは３２０〜１，５００である。
なお、本明細書において、数平均分子量（Ｍｎ）は、ゲルパーミエーションクロマトグラフィー（ＧＰＣ）法で測定される標準ポリスチレン換算の値であり、測定条件としては、実施例に記載の条件が挙げられる。The number average molecular weight (Mn) of the polyalkylene glycol (B1) used in one embodiment of the present invention is preferably 200 to 10,000, more preferably 240 to 5, from the viewpoint of improving the viscosity index of the lubricating oil composition. It is 000, more preferably 280 to 3,000, and even more preferably 320 to 1,500.
In the present specification, the number average molecular weight (Mn) is a value in terms of standard polystyrene measured by a gel permeation chromatography (GPC) method, and examples of the measurement conditions include the conditions described in Examples. ..
また、本発明の一態様で用いるポリアルキレングリコール（Ｂ１）は、スラッジ析出の抑制効果をより向上させた潤滑油組成物とする観点から、末端の少なくとも一つ以上を置換基で封鎖したポリアルキレングリコールであることが好ましい。
ポリアルキレングリコールの末端を封鎖し得る上記置換基としては、例えば、炭素数１〜１０の１価の炭化水素基、炭素数２〜１０のアシル基、又は、環形成原子数３〜１０の複素環基が挙げられ、炭素数１〜１０の１価の炭化水素基が好ましい。
なお、上記置換基として選択し得る、１価の炭化水素基、アシル基、及び複素環基に関する具体的な基の例示、並びに、好適な炭素数又は環形成原子数の範囲は、後述の式（ｂ−１）中のＲＢ１及びＲＢ３に関する規定と同じである。Further, the polyalkylene glycol (B1) used in one embodiment of the present invention is a polyalkylene glycol in which at least one or more ends are sealed with a substituent from the viewpoint of obtaining a lubricating oil composition having a further improved effect of suppressing sludge precipitation. It is preferably glycol.
Examples of the substituent that can block the terminal of the polyalkylene glycol include a monovalent hydrocarbon group having 1 to 10 carbon atoms, an acyl group having 2 to 10 carbon atoms, or a complex having 3 to 10 ring-forming atoms. A ring group is mentioned, and a monovalent hydrocarbon group having 1 to 10 carbon atoms is preferable.
An example of a specific group relating to a monovalent hydrocarbon group, an acyl group, and a heterocyclic group that can be selected as the above-mentioned substituent, and a range of suitable carbon numbers or ring-forming atoms are described in the formulas described below. It is the same as the provision regarding R B1 and R B3 in (b-1).
本発明の一態様において、ポリアルキレングリコール（Ｂ１）としては、スラッジ析出の抑制効果をより向上させた潤滑油組成物とする観点から、下記一般式（ｂ−１）で表される化合物であることが好ましい。
ＲＢ１−［（ＯＲＢ２）ａ−ＯＲＢ３］ｂ （ｂ−１）In one aspect of the present invention, the polyalkylene glycol (B1) is a compound represented by the following general formula (b-1) from the viewpoint of obtaining a lubricating oil composition having a further improved effect of suppressing sludge precipitation. Is preferable.
R B1 -[(OR B2 ) a- OR B3 ] b (b-1)
上記一般式（ｂ−１）中、ＲＢ１は、水素原子、炭素数１〜１０の１価の炭化水素基、炭素数２〜１０のアシル基、炭素数１〜１０の２〜６価の炭化水素基、又は、環形成原子数３〜１０の複素環基である。
ＲＢ２は、炭素数２〜４のアルキレン基である。
ＲＢ３は、水素原子、炭素数１〜１０の１価の炭化水素基、炭素数２〜１０のアシル基、又は、環形成原子数３〜１０の複素環基である。In the above general formula (b-1), RB1 has a hydrogen atom, a monovalent hydrocarbon group having 1 to 10 carbon atoms, an acyl group having 2 to 10 carbon atoms, and 2 to 6 valent carbon atoms having 1 to 10 carbon atoms. It is a hydrocarbon group or a heterocyclic group having 3 to 10 ring-forming atoms.
RB2 is an alkylene group having 2 to 4 carbon atoms.
RB3 is a hydrogen atom, a monovalent hydrocarbon group having 1 to 10 carbon atoms, an acyl group having 2 to 10 carbon atoms, or a heterocyclic group having 3 to 10 ring-forming atoms.
ｂは、１〜６の整数であり、好ましくは１〜４の整数、より好ましくは１〜３、更に好ましくは１である。
なお、ｂは、前記一般式（ｂ−１）中のＲＢ１との結合部位の数に応じて定められる。
例えば、ＲＢ１がアルキル基やシクロアルキル基等の１価の炭化水素基やアシル基の場合には、ｂは１となる。つまり、ＲＢ１が炭化水素基又は複素環基であり、当該基の価数が１、２、３、４、５、及び６価である場合、ｂはそれぞれ１、２、３、４、５及び６となる。b is an integer of 1 to 6, preferably an integer of 1 to 4, more preferably 1 to 3, and even more preferably 1.
In addition, b is determined according to the number of binding sites with RB1 in the general formula (b-1).
For example, when RB1 is a monovalent hydrocarbon group such as an alkyl group or a cycloalkyl group or an acyl group, b is 1. That is, when RB1 is a hydrocarbon group or a heterocyclic group and the valences of the groups are 1, 2, 3, 4, 5, and hexavalent, b is 1, 2, 3, 4, 5 respectively. And 6.
ａは、１以上の数であり、前記一般式（ｂ−１）で表される化合物の数平均分子量の値に応じて適宜設定される値である。
なお、異なる２種以上の前記一般式（ｂ−１）で表される化合物を用いる場合には、ａの値は平均値（加重平均値）となり、当該平均値が１以上であればよい。
また、ＲＢ２及びＲＢ３が複数存在する場合は、複数のＲＢ２及びＲＢ３は、互いに同一であってもよく、異なっていてもよい。a is a number of 1 or more, and is a value appropriately set according to the value of the number average molecular weight of the compound represented by the general formula (b-1).
When two or more different compounds represented by the general formula (b-1) are used, the value of a is an average value (weighted average value), and the average value may be 1 or more.
Also, if the R B2 and R B3 there is a plurality, the plurality of R B2 and R B3, may be the same as each other or may be different.
なお、本発明の一態様において、前記一般式（ｂ−１）中のＲＢ１及びＲＢ３の少なくとも一つが、炭素数１〜１０の１価の炭化水素基、炭素数２〜１０のアシル基、炭素数１〜１０の２〜６価の炭化水素基、又は、環形成原子数３〜１０の複素環基であることが好ましく、炭素数１〜１０の１価の炭化水素基であることがより好ましい。In one aspect of the present invention, at least one of RB1 and RB3 in the general formula (b-1) is a monovalent hydrocarbon group having 1 to 10 carbon atoms and an acyl group having 2 to 10 carbon atoms. , A 2 to 6-valent hydrocarbon group having 1 to 10 carbon atoms, or a heterocyclic group having 3 to 10 ring-forming atoms, and a monovalent hydrocarbon group having 1 to 10 carbon atoms. Is more preferable.
ＲＢ１及びＲＢ３として選択し得る、炭素数１〜１０の１価の炭化水素基としては、例えば、メチル基、エチル基、プロピル基（ｎ−プロピル基、イソプロピル基）、ブチル基（ｎ−ブチル基、イソブチル基、ｓ−ブチル基、ｔ−ブチル基）、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基等のアルキル基；シクロペンチル基、シクロヘキシル基、メチルシクロヘキシル基、エチルシクロヘキシル基、プロピルシクロヘキシル基、ジメチルシクロヘキシル基等のシクロアルキル基；フェニル基、メチルフェニル基、エチルフェニル基、ジメチルフェニル基、プロピルフェニル基、トリメチルフェニル基、ブチルフェニル基、ナフチル基等のアリール基；ベンジル基、フェニルエチル基、メチルベンジル基、フェニルプロピル基、フェニルブチル基等のアリールアルキル基；等が挙げられる。
なお、上記アルキル基は直鎖及び分岐鎖のいずれであってもよい。
当該１価の炭化水素基の炭素数としては、好ましくは１〜１０、より好ましくは１〜６、更に好ましくは１〜４である。Examples of monovalent hydrocarbon groups having 1 to 10 carbon atoms that can be selected as RB1 and RB3 include methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), and butyl group (n-). Butyl group, isobutyl group, s-butyl group, t-butyl group), pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group and other alkyl groups; cyclopentyl group, cyclohexyl group, methylcyclohexyl group, ethyl Cycloalkyl groups such as cyclohexyl group, propylcyclohexyl group, dimethylcyclohexyl group; aryl groups such as phenyl group, methylphenyl group, ethylphenyl group, dimethylphenyl group, propylphenyl group, trimethylphenyl group, butylphenyl group, naphthyl group; Arylalkyl groups such as benzyl group, phenylethyl group, methylbenzyl group, phenylpropyl group and phenylbutyl group; and the like.
The alkyl group may be either a straight chain or a branched chain.
The monovalent hydrocarbon group preferably has 1 to 10 carbon atoms, more preferably 1 to 6 carbon atoms, and further preferably 1 to 4 carbon atoms.
ＲＢ１及びＲＢ３として選択し得る、炭素数２〜１０のアシル基が有する炭化水素基部分は、直鎖、分岐鎖、環状のいずれであってもよい。当該炭化水素基部分としては、上述のＲＢ１及びＲＢ３として選択し得る１価の炭化水素基のうち炭素数１〜９のものが挙げられる。
なお、当該アシル基の炭素数としては、好ましくは２〜１０、より好ましくは２〜６である。May be selected as R B1 and R B3, a hydrocarbon group moiety having an acyl group having 2 to 10 carbon atoms, straight-chain, branched-chain, it may be either cyclic. Examples of the hydrocarbon group portion include those having 1 to 9 carbon atoms among the monovalent hydrocarbon groups that can be selected as RB1 and RB3 described above.
The number of carbon atoms of the acyl group is preferably 2 to 10, and more preferably 2 to 6.
ＲＢ１として選択し得る、２〜６価の炭化水素基としては、上述のＲＢ１として選択し得る１価の炭化水素基から更に水素原子を１〜５個除いた残基や、トリメチロールプロパン、グリセリン、ペンタエリスリトール、ソルビトール、１，２，３−トリヒドロキシシクロヘキサン、１，３，５−トリヒドロキシシクロヘキサン等の多価アルコールから水酸基を除いた残基等が挙げられる。
なお、当該２〜６価の炭化水素基の炭素数としては、好ましくは１〜１０、より好ましくは１〜６、更に好ましくは１〜４である。It may be selected as R B1, 2 to 6-valent hydrocarbon group, residue or, further excluding 1-5 hydrogen atoms from a monovalent hydrocarbon group which may be selected as described above for R B1, trimethylolpropane , Glycerin, pentaerythritol, sorbitol, 1,2,3-trihydroxycyclohexane, 1,3,5-trihydroxycyclohexane and other polyhydric alcohols from which hydroxyl groups have been removed.
The number of carbon atoms of the 2 to 6-valent hydrocarbon group is preferably 1 to 10, more preferably 1 to 6, and even more preferably 1 to 4.
ＲＢ１及びＲＢ３として選択し得る、環形成原子数３〜１０の複素環基としては、酸素原子含有複素環基、又は硫黄原子含有複素環基が好ましい。なお、当該複素環基は、飽和環であってもよく不飽和環であってもよい。
当該酸素原子含有複素環基としては、例えば、１，３−プロピレンオキシド、テトラヒドロフラン、テトラヒドロピラン、及びヘキサメチレンオキシド等の酸素原子含有飽和複素環や、アセチレンオキシド、フラン、ピラン、オキシシクロヘプタトリエン、イソベンゾフラン、及びイソクロメン等の酸素原子含有不飽和複素環が有する水素原子を１〜６個除いた残基が挙げられる。
また、当該硫黄原子含有複素環基としては、例えば、エチレンスルフィド、トリメチレンスルフィド、テトラヒドロチオフェン、テトラヒドロチオピラン、及びヘキサメチレンスルフィド等の硫黄原子含有飽和複素環や、アセチレンスルフィド、チオフェン、チアピラン、及びチオトリピリデン等の硫黄原子含有不飽和複素環等が有する水素原子を１〜６個除いた残基が挙げられる。
当該複素環基の環形成原子数としては、好ましくは３〜１０、より好ましくは３〜６、更に好ましくは５又は６である。As the heterocyclic group having 3 to 10 ring-forming atoms that can be selected as R B1 and R B3 , an oxygen atom-containing heterocyclic group or a sulfur atom-containing heterocyclic group is preferable. The heterocyclic group may be a saturated ring or an unsaturated ring.
Examples of the oxygen atom-containing heterocyclic group include oxygen atom-containing saturated heterocycles such as 1,3-propylene oxide, tetrahydrofuran, tetrahydropyran, and hexamethylene oxide, acetylene oxide, furan, pyran, and oxycycloheptatriene. Examples thereof include residues obtained by removing 1 to 6 hydrogen atoms of an oxygen atom-containing unsaturated heterocycle such as isobenzofuran and isochromen.
Examples of the sulfur atom-containing heterocyclic group include sulfur atom-containing saturated heterocycles such as ethylene sulfide, trimethylene sulfide, tetrahydrothiophene, tetrahydrothiophene, and hexamethylene sulfide, and acetylene sulfide, thiophene, thiapyrane, and the like. Examples thereof include residues obtained by removing 1 to 6 hydrogen atoms contained in a sulfur atom-containing unsaturated heterocycle such as thiotripylidene.
The number of ring-forming atoms of the heterocyclic group is preferably 3 to 10, more preferably 3 to 6, and even more preferably 5 or 6.
ＲＢ２として選択し得る、炭素数２〜４のアルキレン基としては、例えば、エチレン基（−ＣＨ２ＣＨ２−）等の炭素数２のアルキレン基；トリメチレン基（−ＣＨ２ＣＨ２ＣＨ２−）、１−メチルエチレン基（プロピレン基）（−ＣＨ（ＣＨ３）ＣＨ２−）等の炭素数３のアルキレン基；テトラメチレン基（−ＣＨ２ＣＨ２ＣＨ２ＣＨ２−）、１−メチルトリメチレン基（−ＣＨ（ＣＨ３）ＣＨ２ＣＨ２−）、２−メチルトリメチレン基（−ＣＨ２ＣＨ（ＣＨ３）ＣＨ２−）、ブチレン基（−Ｃ（ＣＨ３）２ＣＨ２−），１−エチルエチレン基（−ＣＨ（ＣＨ２ＣＨ３）ＣＨ２−、１，２−ジメチルエチレン基（−ＣＨ（ＣＨ３）−ＣＨ（ＣＨ３）−）等の炭素数４のアルキレン基が挙げられる。
なお、ＲＢ２が複数存在する場合、複数のＲＢ２は、互いに同一であってもよく、２種以上のアルキレン基の組み合わせであってもよい。
これらの中でも、ＲＢ２としては、エチレン基（−ＣＨ２ＣＨ２−）又は１−メチルエチレン基（プロピレン基）（−ＣＨ（ＣＨ３）ＣＨ２−）が好ましい。Examples of the alkylene group having 2 to 4 carbon atoms that can be selected as RB2 include an alkylene group having 2 carbon atoms such as an ethylene group (-CH 2 CH 2 −); and a trimethylene group (−CH 2 CH 2 CH 2 −). ), 1-Methylethylene group (propylene group) (-CH (CH 3 ) CH 2- ) and other alkylene groups having 3 carbon atoms; tetramethylene group (-CH 2 CH 2 CH 2 CH 2- ), 1-methyl trimethylene group (-CH (CH 3) CH 2 CH 2 -), 2- methyltrimethylene group (-CH 2 CH (CH 3) CH 2 -), butylene (-C (CH 3) 2 CH 2 - ), 1-Ethylethylene group (-CH (CH 2 CH 3 ) CH 2- , 1,2-dimethylethylene group (-CH (CH 3 ) -CH (CH 3 )-), etc. Can be mentioned.
When a plurality of RB2s are present, the plurality of RBs 2 may be the same as each other or may be a combination of two or more kinds of alkylene groups.
Among these, R B2, an ethylene group (-CH 2 CH 2 -) or 1-methylethylene group (propylene group) (- CH (CH 3) CH 2 -) is preferred.
なお、前記一般式（ｂ−１）で表される化合物において、オキシプロピレン単位（−ＯＣＨ（ＣＨ３）ＣＨ２−）の含有量は、当該化合物の構造中のオキシアルキレン（式中のＯＲＢ２）の全量（１００モル％）基準で、好ましくは５０〜１００モル％、より好ましくは６５〜１００モル％、更に好ましくは８０〜１００モル％である。In the compound represented by the general formula (b-1), the content of the oxypropylene unit (-OCH (CH 3 ) CH 2- ) is the oxyalkylene (OR B2 in the formula) in the structure of the compound. ), It is preferably 50 to 100 mol%, more preferably 65 to 100 mol%, and further preferably 80 to 100 mol% based on the total amount (100 mol%).
本発明の一態様で用いる成分（Ｂ１）の４０℃における動粘度としては、好ましくは８〜３５０ｍｍ２／ｓ、より好ましくは１０〜１５０ｍｍ２／ｓ、更に好ましくは１２〜１００ｍｍ２／ｓ、より更に好ましくは１５〜６８ｍｍ２／ｓである。The kinematic viscosity of the component (B1) used in one embodiment of the present invention at 40 ° C. is preferably 8 to 350 mm 2 / s, more preferably 10 to 150 mm 2 / s, still more preferably 12 to 100 mm 2 / s. More preferably, it is 15 to 68 mm 2 / s.
また、本発明の一態様で用いる成分（Ｂ１）の粘度指数としては、好ましくは９０以上、より好ましくは１００以上、更に好ましくは１２０以上、より更に好ましくは１４０以上である。 The viscosity index of the component (B1) used in one embodiment of the present invention is preferably 90 or more, more preferably 100 or more, still more preferably 120 or more, still more preferably 140 or more.
本発明の一態様の潤滑油組成物において、成分（Ｂ１）の含有量は、潤滑油組成物の全量（１００質量％）基準で、好ましくは１．０〜７０質量％、より好ましくは１．２〜５０質量％、より好ましくは１．４〜３０質量％、更に好ましくは１．５〜２０質量％、より更に好ましくは１．７〜１２質量％、特に好ましくは１．９〜６質量％である。 In the lubricating oil composition of one aspect of the present invention, the content of the component (B1) is preferably 1.0 to 70% by mass, more preferably 1. based on the total amount (100% by mass) of the lubricating oil composition. 2 to 50% by mass, more preferably 1.4 to 30% by mass, still more preferably 1.5 to 20% by mass, still more preferably 1.7 to 12% by mass, particularly preferably 1.9 to 6% by mass. Is.
［ポリオールエステル（Ｂ２）］
ポリオールエステル（Ｂ２）としては、例えば、分子内に四級炭素を一つ以上有し、且つ、当該四級炭素の少なくとも一つにメチロール基が１〜４個結合してなるヒンダードポリオールと、脂肪族モノカルボン酸とのエステルであるヒンダードエステルが挙げられる。
ポリオールエステル（Ｂ２）は、単独で用いてもよく、２種以上を併用してもよい。[Polyform ester (B2)]
Examples of the polyol ester (B2) include a hindered polyol having one or more quaternary carbons in the molecule and having 1 to 4 methylol groups bonded to at least one of the quaternary carbons. Hindered esters, which are esters with aliphatic monocarboxylic acids, can be mentioned.
The polyol ester (B2) may be used alone or in combination of two or more.
なお、ポリオールエステル（Ｂ２）は、通常、ポリオールの全ての水酸基がエステル化された完全エステルであるが、本発明の効果に影響を与えない範囲で、一部の水酸基がエステル化されずに残った部分エステルを含んでいてもよい。 The polyol ester (B2) is usually a complete ester in which all the hydroxyl groups of the polyol are esterified, but some hydroxyl groups remain unesterified as long as the effects of the present invention are not affected. It may contain a partial ester.
前記ヒンダードポリオールとしては、下記一般式（ｂ−２）で表される化合物であることが好ましい。
前記一般式（ｂ−２）中、ＲＢ１１及びＲＢ１２は、それぞれ独立に、炭素数１〜６の一価の炭化水素基、又はメチロール基（−ＣＨ２ＯＨ）である。
ｎは、０〜４の整数を示し、好ましくは０〜２、より好ましくは０〜１、更に好ましくは０である。なお、ｎ＝０の場合は単結合となり、下記一般式（ｂ−２’）で表される化合物となる。In the general formula (b-2), RB11 and RB12 are independently monovalent hydrocarbon groups having 1 to 6 carbon atoms or methylol groups (-CH 2 OH).
n represents an integer of 0 to 4, preferably 0 to 2, more preferably 0 to 1, and even more preferably 0. When n = 0, it becomes a single bond and becomes a compound represented by the following general formula (b-2').
〔前記一般式（ｂ−２’）中、ＲＢ１１及びＲＢ１２は、それぞれ独立に、炭素数１〜６の一価の炭化水素基、又はメチロール基（−ＣＨ２ＯＨ）である。〕
[In the general formula (b-2'), RB11 and RB12 are independently monovalent hydrocarbon groups having 1 to 6 carbon atoms or methylol groups (-CH 2 OH). ]
ＲＢ１１及びＲＢ１２として選択し得る、炭素数１〜６の一価の炭化水素基としては、例えば、炭素数１〜６のアルキル基（メチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基）、シクロペンチル基、シクロヘキシル基、フェニル基等が挙げられる。
なお、上記アルキル基は、直鎖及び分岐鎖のいずれであってもよい。
これらの中でも、ＲＢ１１及びＲＢ１２として選択し得る、炭素数１〜６の一価の炭化水素基としては、炭素数１〜６のアルキル基が好ましく、炭素数１〜３のアルキル基がより好ましい。Examples of the monovalent hydrocarbon group having 1 to 6 carbon atoms that can be selected as RB11 and RB12 include an alkyl group having 1 to 6 carbon atoms (methyl group, ethyl group, propyl group, butyl group, pentyl group). , Hexyl group), cyclopentyl group, cyclohexyl group, phenyl group and the like.
The alkyl group may be either a straight chain or a branched chain.
Among these may be selected as R B11 and R B12, a monovalent hydrocarbon group having 1 to 6 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms, more alkyl groups having 1 to 3 carbon atoms preferable.
下記一般式（ｂ−２）で表される化合物としては、例えば、ジアルキルプロパンジオール（アルキル基の炭素数は１〜６である）、トリメチロールアルカン（アルカンの炭素数は２〜７である）、ペンタエリスリトール等のヒンダードポリオール及びこれらの脱水縮合物が挙げられ、より具体的には、ネオペンチルグリコール、２−エチル−２−メチル−１，３−プロパンジオール、２，２−ジエチル−１，３−プロパンジール、トリメチロールエタン、トリメチロールプロパン、トリメチロールブタン、トリメチロールペンタン、トリメチロールヘキサン、トリメチロールヘプタン、ペンタエリスリトール、２，２，６，６−テトラメチル−４−オキサ−１，７−ヘプタンジオール、２，２，６，６，１０，１０−ヘキサメチル−４，８−ジオキサ−１，１１−ウンデカジオール、２，２，６，６，１０，１０，１４，１４−オクタメチル−４，８，１２−トリオキサ−１，１５−ペンタデカジオール、２，６−ジ（ヒドロキシメチル）−２，６−ジメチル−４−オキサ−１，７−ヘプタンジオール、２，６，１０−トリ（ヒドロキシメチル）−２，６，１０−トリメチル−４，８−ジオキサ−１，１１−ウンデカジオール、２，６，１０，１４−テトラ（ヒドロキシメチル）−２，６，１０，１４−テトラメチル−４，８，１２−トリオキサ−１，１５−ペンタデカジオール、ジ（ペンタエリスリトール）、トリ（ペンタエリスリトール）、テトラ（ペンタエリスリトール）、ペンタ（ペンタエリスリトール）等が挙げられる。
これらの中でも、トリメチロールプロパン、ネオペンチルグリコール、ペンタエリスリトール、及びこれらの二分子又は三分子の脱水縮合物が好ましく、トリメチロールプロパン、ネオペンチルグリコール、及びペンタエリスリトールがより好ましく、トリメチロールプロパンが更に好ましい。Examples of the compound represented by the following general formula (b-2) include dialkylpropanediol (alkyl group has 1 to 6 carbon atoms) and trimethylalkane (alkane has 2 to 7 carbon atoms). , Hindered polyols such as pentaerythritol and dehydration condensates thereof, and more specifically, neopentyl glycol, 2-ethyl-2-methyl-1,3-propanediol, 2,2-diethyl-1. , 3-Propanezil, Trimethylolethane, Trimethylolpropane, Trimethylolbutane, Trimethylolpentane, Trimethylolhexane, Trimethylolheptan, Pentaerythritol, 2,2,6,6-Tetramethyl-4-oxa-1, 7-Heptanediol, 2,2,6,6,10,10-hexamethyl-4,8-dioxa-1,11-undecadiol, 2,2,6,6,10,10,14,14-octamethyl -4,8,12-trioxa-1,15-pentadecadiol, 2,6-di (hydroxymethyl) -2,6-dimethyl-4-oxa-1,7-heptanediol, 2,6,10- Tri (hydroxymethyl) -2,6,10-trimethyl-4,8-dioxa-1,11-undecadiol, 2,6,10,14-tetra (hydroxymethyl) -2,6,10,14- Examples thereof include tetramethyl-4,8,12-trioxa-1,15-pentadecadiol, di (pentaerythritol), tri (pentaerythritol), tetra (pentaerythritol), and penta (pentaerythritol).
Among these, trimethylolpropane, neopentyl glycol, pentaerythritol, and dehydration condensates of these two or three molecules are preferable, trimethylolpropane, neopentyl glycol, and pentaerythritol are more preferable, and trimethylolpropane is further preferable. preferable.
前記脂肪族モノカルボン酸としては、炭素数５〜２２の飽和脂肪族モノカルボン酸が挙げられる。
当該飽和脂肪族モノカルボン酸のアシル基は、直鎖状、分岐状のいずれであってもよい。
飽和脂肪族モノカルボン酸としては、例えば、吉草酸、カプロン酸、エナント酸、カプリル酸、ペラルゴン酸、カプリン酸、ウンデカン酸、ラウリン酸、トリデカン酸、ミリスチン酸、ペンタデカン酸、パルミチン酸、ヘプタデカン酸、ステアリン酸、ノナデカン酸、アラキン酸、ベヘン酸等の直鎖状飽和モノカルボン酸；イソミリスチン酸、イソパルミチン酸、イソステアリン酸、２，２−ジメチルプロパン酸、２，２−ジメチルブタン酸、２，２−ジメチルペンタン酸、２，２−ジメチルオクタン酸、２−エチル−２，３，３−トリメチルブタン酸、２，２，３，４−テトラメチルペンタン酸、２，５，５−トリメチル−２−ｔ−ブチルヘキサン酸、２，３，３−トリメチル−２−エチルブタン酸、２，３−ジメチル−２−イソプロピルブタン酸、２−エチルヘキサン酸、３，５，５−トリメチルヘキサン酸等の分岐状飽和モノカルボン酸等が挙げられる。
これらの脂肪族モノカルボン酸は、エステル化の際、一種を単独で用いてもよく、二種以上を混合して用いてもよい。
飽和脂肪族モノカルボン酸の炭素数としては、好ましくは５〜１８、より好ましくは６〜１４、更に好ましくは８〜１０である。Examples of the aliphatic monocarboxylic acid include saturated aliphatic monocarboxylic acids having 5 to 22 carbon atoms.
The acyl group of the saturated aliphatic monocarboxylic acid may be linear or branched.
Examples of saturated aliphatic monocarboxylic acids include valeric acid, caproic acid, enanthic acid, capric acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, and heptadecanoic acid. Linear saturated monocarboxylic acids such as stearic acid, nonadecanic acid, araquinic acid, bechenic acid; isomiristic acid, isopalmitic acid, isostearic acid, 2,2-dimethylpropanoic acid, 2,2-dimethylbutanoic acid, 2, 2-Dimethylpentanoic acid, 2,2-dimethyloctanoic acid, 2-ethyl-2,3,3-trimethylbutanoic acid, 2,2,3,4-tetramethylpentanoic acid, 2,5,5-trimethyl-2 Branches of -t-butylhexanoic acid, 2,3,3-trimethyl-2-ethylbutanoic acid, 2,3-dimethyl-2-isopropylbutanoic acid, 2-ethylhexanoic acid, 3,5,5-trimethylhexanoic acid and the like State saturated monocarboxylic acid and the like can be mentioned.
These aliphatic monocarboxylic acids may be used alone or in admixture of two or more at the time of esterification.
The number of carbon atoms of the saturated aliphatic monocarboxylic acid is preferably 5 to 18, more preferably 6 to 14, and even more preferably 8 to 10.
本発明の一態様で用いるポリオールエステル（Ｂ２）の４０℃における動粘度としては、好ましくは８〜３５０ｍｍ２／ｓ、より好ましくは１０〜１５０ｍｍ２／ｓ、更に好ましくは１１〜１００ｍｍ２／ｓ、より更に好ましくは１２〜６８ｍｍ２／ｓである。The kinematic viscosity of the polyol ester (B2) used in one embodiment of the present invention at 40 ° C. is preferably 8 to 350 mm 2 / s, more preferably 10 to 150 mm 2 / s, still more preferably 11 to 100 mm 2 / s. Even more preferably, it is 12 to 68 mm 2 / s.
また、本発明の一態様で用いるポリオールエステル（Ｂ２）の粘度指数としては、好ましくは９０以上、より好ましくは１００以上、更に好ましくは１１０以上、より更に好ましくは１２０以上である。 The viscosity index of the polyol ester (B2) used in one embodiment of the present invention is preferably 90 or more, more preferably 100 or more, still more preferably 110 or more, and even more preferably 120 or more.
本発明の一態様で用いるポリオールエステル（Ｂ２）の数平均分子量（Ｍｎ）としては、好ましくは１００〜８，０００、より好ましくは２００〜４，０００、更に好ましくは３００〜２，０００、より更に好ましくは４００〜１，０００である。 The number average molecular weight (Mn) of the polyol ester (B2) used in one embodiment of the present invention is preferably 100 to 8,000, more preferably 200 to 4,000, still more preferably 300 to 2,000, and further. It is preferably 400 to 1,000.
本発明の一態様の潤滑油組成物において、成分（Ｂ２）の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは２．０〜９０質量％、より好ましくは２．５〜７０質量％、より好ましくは３．０〜５５質量％、更に好ましくは３．５〜４０質量％、より更に好ましくは４．０〜３０質量％、特に好ましくは４．５〜１５質量％である。 In the lubricating oil composition of one aspect of the present invention, the content of the component (B2) is preferably 2.0 to 90% by mass, more preferably 2 based on the total amount (100% by mass) of the lubricating oil composition. .5 to 70% by mass, more preferably 3.0 to 55% by mass, still more preferably 3.5 to 40% by mass, even more preferably 4.0 to 30% by mass, particularly preferably 4.5 to 15% by mass. %.
［成分（Ｂ１）及び（Ｂ２）以外の合成油］
本発明の一態様で用いる合成油（Ｂ）は、本発明の効果を損なわない範囲で、成分（Ｂ１）及び（Ｂ２）以外の他の合成油をさらに含有してもよい。
他の合成油としては、例えば、α−オレフィン単独重合体、又はα−オレフィン共重合体（例えば、エチレン−α−オレフィン共重合体等の炭素数８〜１４のα−オレフィン共重合体）等のポリα−オレフィン；イソパラフィン；二塩基酸エステル（例えば、ジトリデシルグルタレート等）、芳香族エステル（例えば、トリメリット酸２−エチルヘキシル、ピロメリット酸２−エチルヘキシル）、リン酸エステル等の成分（Ｂ２）以外の各種エステル；ポリフェニルエーテル等の成分（Ｂ１）以外の各種エーテル；アルキルベンゼン；アルキルナフタレン；等が挙げられる。
これらの合成油は、単独で用いてもよく、２種以上を併用してもよい。[Synthetic oils other than components (B1) and (B2)]
The synthetic oil (B) used in one aspect of the present invention may further contain synthetic oils other than the components (B1) and (B2) as long as the effects of the present invention are not impaired.
Examples of other synthetic oils include α-olefin homopolymers, α-olefin copolymers (for example, α-olefin copolymers having 8 to 14 carbon atoms such as ethylene-α-olefin copolymers) and the like. Polyα-olefins; isoparaffins; dibasic acid esters (eg, ditridecylglutarate, etc.), aromatic esters (eg, 2-ethylhexyl trimellitic acid, 2-ethylhexyl pyromellitic acid), phosphate esters, etc. Various esters other than B2); various ethers other than the component (B1) such as polyphenyl ether; alkylbenzene; alkylnaphthalene; and the like can be mentioned.
These synthetic oils may be used alone or in combination of two or more.
＜酸化防止剤（Ｃ）＞
本発明の一態様の潤滑油組成物は、酸化安定性を良好とすると共に、劣化生成物の発生を抑制し、スラッジ析出の抑制効果を向上させた潤滑油組成物とする観点から、アミン系酸化防止剤（Ｃ１）を含む酸化防止剤（Ｃ）を含有することが好ましい。
また、本発明の一態様で用いる酸化防止剤（Ｃ）は、アミン系酸化防止剤（Ｃ１）と共に、アミン系酸化防止剤（Ｃ１）以外の酸化防止剤をさらに含有してもよい。<Antioxidant (C)>
The lubricating oil composition according to one aspect of the present invention is an amine-based lubricating oil composition from the viewpoint of improving oxidative stability, suppressing the generation of deterioration products, and improving the effect of suppressing sludge precipitation. It is preferable to contain an antioxidant (C) containing an antioxidant (C1).
Further, the antioxidant (C) used in one aspect of the present invention may further contain an antioxidant other than the amine-based antioxidant (C1) together with the amine-based antioxidant (C1).
本発明の一態様の潤滑油組成物において、成分（Ｃ）中の成分（Ｃ１）の含有量としては、劣化生成物の発生を抑制し、スラッジ析出の抑制効果をより向上させ、且つ、酸化安定性に優れた潤滑油組成物とする観点から、成分（Ｃ）の全量（１００質量％）基準で、好ましくは３０〜１００質量％、より好ましくは５０〜１００質量％、更に好ましくは６０〜１００質量％、より更に好ましくは７０〜１００質量％である。 In the lubricating oil composition of one aspect of the present invention, the content of the component (C1) in the component (C) is such that the generation of deterioration products is suppressed, the sludge precipitation suppressing effect is further improved, and oxidation is performed. From the viewpoint of obtaining a lubricating oil composition having excellent stability, it is preferably 30 to 100% by mass, more preferably 50 to 100% by mass, and further preferably 60 to 60 to 100% by mass based on the total amount (100% by mass) of the component (C). It is 100% by mass, more preferably 70 to 100% by mass.
本発明の一態様の潤滑油組成物において、成分（Ｃ）の含有量は、劣化生成物の発生を抑制し、スラッジ析出の抑制効果をより向上させ、且つ、酸化安定性に優れた潤滑油組成物とする観点から、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは０．０１〜１０質量％、より好ましくは０．０５〜７質量％、更に好ましくは０．１〜５質量％である。 In the lubricating oil composition of one aspect of the present invention, the content of the component (C) suppresses the generation of deterioration products, further improves the effect of suppressing sludge precipitation, and is a lubricating oil having excellent oxidation stability. From the viewpoint of the composition, the total amount (100% by mass) of the lubricating oil composition is preferably 0.01 to 10% by mass, more preferably 0.05 to 7% by mass, and further preferably 0.1 to 1% by mass. It is 5% by mass.
［アミン系酸化防止剤（Ｃ１）］
アミン系酸化防止剤（Ｃ１）としては、酸化防止性能を有するアミン系化合物であればよいが、ナフチルアミン（Ｃ１１）、ジフェニルアミン（Ｃ１２）等が挙げられる。
アミン系酸化防止剤（Ｃ１）は、単独で用いてもよく、２種以上を併用してもよい。
なお、本発明の一態様において、ナフチルアミン（Ｃ１１）とジフェニルアミン（Ｃ１２）とを共に含むことが好ましい。[Amine-based antioxidant (C1)]
The amine-based antioxidant (C1) may be any amine-based compound having antioxidant performance, and examples thereof include naphthylamine (C11) and diphenylamine (C12).
The amine-based antioxidant (C1) may be used alone or in combination of two or more.
In one aspect of the present invention, it is preferable to contain both naphthylamine (C11) and diphenylamine (C12).
本発明の一態様の潤滑油組成物において、ナフチルアミン（Ｃ１１）とジフェニルアミン（Ｃ１２）との含有量比〔（Ｃ１１）／（Ｃ１２）〕としては、質量比で、好ましくは１０／９０〜９０／１０、より好ましくは１５／８５〜８５／１５、更に好ましくは２０／８０〜８０／２０、より更に好ましくは２５／７５〜７５／２５である。 In the lubricating oil composition of one aspect of the present invention, the content ratio [(C11) / (C12)] of naphthylamine (C11) and diphenylamine (C12) is preferably 10/90 to 90 / by mass ratio. 10, more preferably 15/85 to 85/15, still more preferably 20/80 to 80/20, and even more preferably 25/75 to 75/25.
ナフチルアミン（Ｃ１１）としては、例えば、フェニル−α−ナフチルアミン、フェニル−β−ナフチルアミン、アルキルフェニル−α−ナフチルアミン、アルキルフェニル−β−ナフチルアミン等が挙げられるが、アルキルフェニル−α−ナフチルアミン及びアルキルフェニル−β−ナフチルアミンが好ましい。
アルキルフェニル−α−ナフチルアミン及びアルキルフェニル−β−ナフチルアミンが有するアルキル基の炭素数としては、好ましくは１〜３０であるが、鉱油（Ａ）及び合成油（Ｂ）との溶解性を向上させると共に、スラッジ析出の抑制効果をより向上させる観点から、より好ましくは１〜２０、更に好ましくは４〜１６、より更に好ましくは６〜１４である。Examples of naphthylamine (C11) include phenyl-α-naphthylamine, phenyl-β-naphthylamine, alkylphenyl-α-naphthylamine, alkylphenyl-β-naphthylamine, and the like, but alkylphenyl-α-naphthylamine and alkylphenyl-. β-naphthylamine is preferred.
The alkyl group of the alkylphenyl-α-naphthylamine and the alkylphenyl-β-naphthylamine preferably has 1 to 30 carbon atoms, but it improves the solubility in the mineral oil (A) and the synthetic oil (B). From the viewpoint of further improving the effect of suppressing sludge precipitation, it is more preferably 1 to 20, still more preferably 4 to 16, and even more preferably 6 to 14.
ジフェニルアミン（Ｃ１２）としては、下記一般式（ｃ−１）で表される化合物であることが好ましく、下記一般式（ｃ−２）で表される化合物であることがより好ましい。 The diphenylamine (C12) is preferably a compound represented by the following general formula (c-1), and more preferably a compound represented by the following general formula (c-2).
前記一般式（ｃ−１）、（ｃ−２）中、Ｒｘ及びＲｙは、それぞれ独立に、炭素数１〜３０のアルキル基、環形成原子数６〜１８のアリール基で置換された炭素数１〜３０のアルキル基である。
当該アルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよい。
前記一般式（ｃ−１）中、ｚ１及びｚ２は、それぞれ独立に、０〜５の整数であり、好ましくは０又は１、より好ましくは１である。なお、Ｒｘ及びＲｙが複数存在する場合、複数のＲｘ及びＲｙは、同一であってもよく、互いに異なっていてもよい。In the general formulas (c-1) and (c-2), R x and R y were independently substituted with an alkyl group having 1 to 30 carbon atoms and an aryl group having 6 to 18 ring-forming atoms, respectively. It is an alkyl group having 1 to 30 carbon atoms.
The alkyl group may be a straight chain alkyl group or a branched chain alkyl group.
In the general formula (c-1), z1 and z2 are independently integers of 0 to 5, preferably 0 or 1, and more preferably 1. In the case where R x and R y there are a plurality, the plurality of R x and R y may be the same or may be different from each other.
なお、Ｒｘ及びＲｙとして選択し得る、当該アルキル基の炭素数としては、１〜３０であるが、好ましくは１〜２０、より好ましくは１〜１０である。
当該アルキル基に置換し得るアリール基としては、フェニル基、ナフチル基、ビフェニル基等が挙げられるが、フェニル基が好ましい。The number of carbon atoms of the alkyl group that can be selected as R x and R y is 1 to 30, preferably 1 to 20, and more preferably 1 to 10.
Examples of the aryl group that can be substituted with the alkyl group include a phenyl group, a naphthyl group, a biphenyl group and the like, but a phenyl group is preferable.
アルキルフェニル−ナフチルアミンが有するアルキル基、及び、ジフェニルアミンが有し得るアルキル基としては、例えば、メチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、ヘキサデシル基、オクタデシル基、ノナデシル基、イコシル基、テトラコシル基等が挙げられる。 Examples of the alkyl group of alkylphenyl-naphthylamine and the alkyl group of diphenylamine include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group and nonyl group. Examples thereof include a decyl group, an undecyl group, a dodecyl group, a hexadecyl group, an octadecyl group, a nonadecil group, an icosyl group and a tetracosyl group.
本発明の一態様の潤滑油組成物において、劣化生成物の発生を抑制し、スラッジ析出の抑制効果をより向上させ、且つ、酸化安定性に優れた潤滑油組成物とする観点から、アミン系酸化防止剤（Ｃ１）の窒素原子換算での含有量としては、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは５０〜３０００質量ｐｐｍ、より好ましくは１００〜２０００質量ｐｐｍ、更に好ましくは１２０〜１５００質量ｐｐｍ、より更に好ましくは１５０〜１０００質量ｐｐｍである。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of suppressing the generation of deterioration products, further improving the effect of suppressing sludge precipitation, and making the lubricating oil composition excellent in oxidative stability, it is an amine type. The content of the antioxidant (C1) in terms of nitrogen atom is preferably 50 to 3000% by mass, more preferably 100 to 2000% by mass, based on the total amount (100% by mass) of the lubricating oil composition. It is preferably 120 to 1500 mass ppm, and even more preferably 150 to 1000 mass ppm.
［アミン系酸化防止剤（Ｃ１）以外の酸化防止剤］
酸化防止剤（Ｃ）としては、上述のアミン系酸化防止剤（Ｃ１）以外の酸化防止剤も含有してもよい。そのような酸化防止剤としては、フェノール系酸化防止剤が好ましい。[Antioxidants other than amine-based antioxidants (C1)]
As the antioxidant (C), an antioxidant other than the above-mentioned amine-based antioxidant (C1) may also be contained. As such an antioxidant, a phenolic antioxidant is preferable.
フェノール系酸化防止剤としては、例えば、２，６−ジ−ｔ−ブチル−４−メチルフェノール、２，６−ジ−ｔ−ブチル−４−エチルフェノール、２，４，６−トリ−ｔ−ブチルフェノール、２，６−ジ−ｔ−ブチル−４−ヒドロキシメチルフェノール、２，６−ジ−ｔ−ブチルフェノール、２，４−ジメチル−６−ｔ−ブチルフェノール、２，６−ジ−ｔ−ブチル−４−（Ｎ，Ｎ−ジメチルアミノメチル）フェノール、２，６−ジ−ｔ−アミル−４−メチルフェノール、ｎ−オクタデシル−３−（３，５−ジ−ｔ−ブチル−４−ヒドロキシフェニル）プロピオネート等の単環フェノール系化合物や、４，４’−メチレンビス（２，６−ジ−ｔ−ブチルフェノール）、４，４’−イソプロピリデンビス（２，６−ジ−ｔ−ブチルフェノール）、２，２’−メチレンビス（４−メチル−６−ｔ−ブチルフェノール）、４，４’−ビス（２，６−ジ−ｔ−ブチルフェノール）、４，４’−ビス（２−メチル−６−ｔ−ブチルフェノール）、２，２’−メチレンビス（４−エチル−６−ｔ−ブチルフェノール）、４，４’−ブチリデンビス（３−メチル−６−ｔ−ブチルフェノール）等の多環フェノール系化合物が挙げられる。 Examples of the phenolic antioxidant include 2,6-di-t-butyl-4-methylphenol, 2,6-di-t-butyl-4-ethylphenol, and 2,4,6-tri-t-. Butylphenol, 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) Monocyclic phenolic compounds such as propionate, 4,4'-methylenebis (2,6-di-t-butylphenol), 4,4'-isopropyridenebis (2,6-di-t-butylphenol), 2, 2'-Methylenebis (4-methyl-6-t-butylphenol), 4,4'-bis (2,6-di-t-butylphenol), 4,4'-bis (2-methyl-6-t-butylphenol) ), 2,2'-Methylenebis (4-ethyl-6-t-butylphenol), 4,4'-butylidenebis (3-methyl-6-t-butylphenol) and other polycyclic phenolic compounds.
本発明の一態様の潤滑油組成物において、アミン系酸化防止剤（Ｃ１）１００質量部に対する、フェノール系酸化防止剤の含有量としては、好ましくは０〜１００質量部、より好ましくは０〜６０質量部、更に好ましくは０〜４０質量部である。 In the lubricating oil composition of one aspect of the present invention, the content of the phenolic antioxidant with respect to 100 parts by mass of the amine-based antioxidant (C1) is preferably 0 to 100 parts by mass, more preferably 0 to 60 parts by mass. It is by mass, more preferably 0 to 40 parts by mass.
＜リン系化合物（Ｄ）＞
本発明の一態様の潤滑油組成物は、耐摩耗性の向上の観点から、さらに、中性リン酸エステル（Ｄ１）、酸性リン酸エステル（Ｄ２）、酸性リン酸エステルのアミン塩（Ｄ３）、及び硫黄−リン系化合物（Ｄ４）から選ばれる１種以上のリン系化合物（Ｄ）を含有することが好ましい。
なお、さらに防錆性を向上させる観点から、成分（Ｄ）は、成分（Ｄ１）及び成分（Ｄ３）から選ばれる１種以上を含有することが好ましい。また、比較的少量の添加量で酸化安定性と耐摩耗性とを両立できる観点から、成分（Ｄ３）及び成分（Ｄ４）から選ばれる１種以上を含有することが好ましい。<Phosphorus compound (D)>
From the viewpoint of improving wear resistance, the lubricating oil composition according to one aspect of the present invention further comprises a neutral phosphoric acid ester (D1), an acidic phosphoric acid ester (D2), and an amine salt (D3) of the acidic phosphoric acid ester. , And one or more phosphorus compounds (D) selected from sulfur-phosphorus compounds (D4) are preferably contained.
From the viewpoint of further improving the rust prevention property, the component (D) preferably contains one or more selected from the component (D1) and the component (D3). Further, from the viewpoint of achieving both oxidation stability and abrasion resistance with a relatively small amount of addition, it is preferable to contain at least one selected from the component (D3) and the component (D4).
本発明の一態様の潤滑油組成物において、成分（Ｄ）のリン原子換算での含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは１０〜１６００質量ｐｐｍ、より好ましくは２０〜１２００質量ｐｐｍ、更に好ましくは５０〜１０００質量ｐｐｍ、より更に好ましくは１００〜８００質量ｐｐｍ、特に好ましくは１５０〜６００質量ｐｐｍである。なお、成分（Ｄ３）及び成分（Ｄ４）から選ばれる１種以上を用いるときは、該リン原子換算での含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは１０〜５０質量ｐｐｍ、より好ましくは１０〜３０質量ｐｐｍとすることができる。 In the lubricating oil composition of one aspect of the present invention, the content of the component (D) in terms of phosphorus atom is preferably 10 to 1600 mass ppm based on the total amount (100% by mass) of the lubricating oil composition. It is preferably 20 to 1200 mass ppm, more preferably 50 to 1000 mass ppm, still more preferably 100 to 800 mass ppm, and particularly preferably 150 to 600 mass ppm. When one or more selected from the component (D3) and the component (D4) are used, the content in terms of phosphorus atom is preferably 10 based on the total amount (100% by mass) of the lubricating oil composition. It can be ~ 50 mass ppm, more preferably 10 to 30 mass ppm.
本発明の一態様の潤滑油組成物において、成分（Ｄ）の含有量としては、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは０．０１〜２．０質量％、より好ましくは０．０２〜１．５質量％、更に好ましくは０．０５〜１．０質量％、より更に好ましくは０．１０〜０．７０質量％である。なお、成分（Ｄ３）及び成分（Ｄ４）から選ばれる１種以上を用いるときは、成分（Ｄ）の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは０．０１〜１．０質量ｐｐｍ、より好ましくは０．０１〜０．２質量ｐｐｍ、さらに好ましくは０．０１〜０．０５質量ｐｐｍとすることができる。 In the lubricating oil composition of one aspect of the present invention, the content of the component (D) is preferably 0.01 to 2.0% by mass based on the total amount (100% by mass) of the lubricating oil composition. It is preferably 0.02 to 1.5% by mass, more preferably 0.05 to 1.0% by mass, and even more preferably 0.10 to 0.70% by mass. When one or more selected from the component (D3) and the component (D4) are used, the content of the component (D) is based on the total amount (100% by mass) of the lubricating oil composition, preferably 0. It can be 01 to 1.0 mass ppm, more preferably 0.01 to 0.2 mass ppm, and even more preferably 0.01 to 0.05 mass ppm.
［中性リン酸エステル（Ｄ１）］
中性リン酸エステル（Ｄ１）としては、下記一般式（ｄ１−１）で表される化合物（Ｄ１１）であることが好ましい。
The neutral phosphate ester (D1) is preferably a compound (D11) represented by the following general formula (d1-1).
前記一般式（ｄ１−１）中、ＲＤ１〜ＲＤ３は、それぞれ独立に、炭素数１〜１８（好ましくは３〜１８）のアルキル基、又は、炭素数１〜１８（好ましくは３〜１２）のアルキル基で置換された環形成炭素数６〜１８のアリール基である。
ＲＤ１〜ＲＤ３として選択し得る、炭素数１〜１８のアルキル基としては、例えば、メチル基、エチル基、プロピル基（ｎ−プロピル基、イソプロピル基）、ブチル基（ｎ−ブチル基、ｓ−ブチル基、ｔ−ブチル基、イソブチル基）、ペンチル基、ヘキシル基、２−エチルヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基等が挙げられる。
これらのアルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよい。In the general formula (d1-1), R D1 to R D3 are independently alkyl groups having 1 to 18 carbon atoms (preferably 3 to 18) or 1 to 18 carbon atoms (preferably 3 to 12 carbon atoms). ) Is an aryl group having 6 to 18 carbon atoms substituted with an alkyl group.
Examples of the alkyl group having 1 to 18 carbon atoms that can be selected as R D1 to R D3 include a methyl group, an ethyl group, a propyl group (n-propyl group, an isopropyl group), and a butyl group (n-butyl group, s). -Butyl group, t-butyl group, isobutyl group), pentyl group, hexyl group, 2-ethylhexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group , Hexadecyl group, heptadecyl group, octadecyl group and the like.
These alkyl groups may be linear alkyl groups or branched chain alkyl groups.
前記環形成炭素数６〜１８のアリール基としては、例えば、フェニル基、ナフチル基、アントリル基、フェナントリル基、ビフェニル基、ターフェニル基、フェニルナフチル基等が挙げられ、フェニル基が好ましい。
なお、ＲＤ１〜ＲＤ３として選択し得る、「炭素数１〜１８のアルキル基で置換されたアリール基」としては、上述のアリール基の環形成炭素原子と結合している水素原子の少なくとも一つが、上述の炭素数１〜１８のアルキル基によって置換された基が挙げられる。Examples of the aryl group having 6 to 18 carbon atoms forming a ring include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a biphenyl group, a terphenyl group, a phenylnaphthyl group and the like, and a phenyl group is preferable.
The "aryl group substituted with an alkyl group having 1 to 18 carbon atoms" that can be selected as R D1 to R D3 is at least one of the hydrogen atoms bonded to the ring-forming carbon atom of the above-mentioned aryl group. One is a group substituted with the above-mentioned alkyl group having 1 to 18 carbon atoms.
化合物（Ｄ１１）としては、下記一般式（ｄ１−２）で表される化合物（Ｄ１２）であることがより好ましい。
前記一般式（ｄ１−２）中、ＲＤ１１〜ＲＤ１３は、それぞれ独立に、炭素数１〜１８のアルキル基である。当該アルキル基としては、上述のＲＤ１１〜ＲＤ１３として選択し得るアルキル基と同じものが挙げられる。
Ｒ１１〜Ｒ１３として選択し得る、当該アルキル基の炭素数としては、１〜１８であるが、防錆性を向上させた潤滑油組成物とする観点から、好ましくは３〜１２、より好ましくは３〜８、更に好ましくは３〜６、より更に好ましくは３である。
また、ｐ１〜ｐ３は、それぞれ独立に、１〜５の整数であり、１〜２の整数であることが好ましく、１であることがより好ましい。In the general formula (d1-2), R D11 to R D13 are independently alkyl groups having 1 to 18 carbon atoms. Examples of the alkyl group include those similar to the alkyl group may be selected as described above for R D11 to R D13.
The alkyl group which can be selected as R 11 to R 13 has 1 to 18 carbon atoms, but is preferably 3 to 12 and more preferably 3 to 12 from the viewpoint of obtaining a lubricating oil composition having improved rust prevention properties. Is 3 to 8, more preferably 3 to 6, and even more preferably 3.
Further, p1 to p3 are independently integers of 1 to 5, preferably an integer of 1 to 2, and more preferably 1.
［酸性リン酸エステル（Ｄ２）］
酸性リン酸エステル（Ｄ２）としては、下記一般式（ｄ２−１）で表される化合物、及び、下記一般式（ｄ２−２）で表される化合物から選ばれる１種以上であることが好ましい。
The acidic phosphoric acid ester (D2) is preferably one or more selected from the compound represented by the following general formula (d2-1) and the compound represented by the following general formula (d2-2). ..
前記一般式（ｄ２−１）、（ｄ２−２）中、Ｒａ及びＲｂは、それぞれ独立に、炭素数１〜１２のアルキル基である。当該アルキル基としては、上述のＲＤ１〜ＲＤ３として選択し得るアルキル基のうち、炭素数１〜１２のアルキル基と同じものが挙げられる。
Ｒａ及びＲｂとして選択し得る、当該アルキル基の炭素数としては、好ましくは３〜１０、より好ましくは６〜１０、更に好ましくは８〜１０である。
なお、前記一般式（ｄ２−１）中のＲａ及びＲｂは、同一であってもよく、互いに異なるものであってもよい。In the general formulas (d2-1) and (d2-2), Ra and R b are independently alkyl groups having 1 to 12 carbon atoms. Examples of the alkyl group, among the alkyl groups which may be selected as described above for R D1 to R D3, include those similar to the alkyl group having 1 to 12 carbon atoms.
The number of carbon atoms of the alkyl group that can be selected as Ra and R b is preferably 3 to 10, more preferably 6 to 10, and even more preferably 8 to 10.
In addition, Ra and R b in the general formula (d2-1) may be the same or different from each other.
［酸性リン酸エステルのアミン塩（Ｄ３）］
酸性リン酸エステルのアミン塩（Ｄ３）としては、前記一般式（ｄ２−１）で表される化合物のアミン塩、及び、前記一般式（ｄ２−２）で表される化合物のアミン塩から選ばれる１種以上であることが好ましい。
当該アミン塩を形成するアミンとしては、下記一般式（ｄ３）で表される化合物であることが好ましい。なお、当該アミンは、単独で用いてもよく、２種以上を併用してもよい。
The amine salt (D3) of the acidic phosphoric acid ester is selected from the amine salt of the compound represented by the general formula (d2-1) and the amine salt of the compound represented by the general formula (d2-2). It is preferable that the number is one or more.
The amine forming the amine salt is preferably a compound represented by the following general formula (d3). The amine may be used alone or in combination of two or more.
前記一般式（ｄ３）中、ｑは、１〜３の整数を示す。
Ｒｃは、それぞれ独立に、炭素数６〜１８のアルキル基、炭素数６〜１８のアルケニル基、環形成炭素数６〜１８のアリール基、炭素数７〜１８のアリールアルキル基、又は炭素数６〜１８のヒドロキシアルキル基であり、炭素数６〜１８のアルキル基が好ましい。
なお、Ｒｃが複数存在する場合、複数のＲｃは、互いに同一であってもよく、互いに異なっていてもよい。In the general formula (d3), q represents an integer of 1 to 3.
R c is an alkyl group having 6 to 18 carbon atoms, an alkenyl group having 6 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms forming a ring, an arylalkyl group having 7 to 18 carbon atoms, or an arylalkyl group having 7 to 18 carbon atoms, respectively. It is a hydroxyalkyl group of 6 to 18, preferably an alkyl group having 6 to 18 carbon atoms.
In the case where R c there are a plurality, the plurality of R c is may be identical to each other, may be different from each other.
Ｒｃとして選択し得る、前記アルキル基としては、例えば、ヘキシル基、ヘプチル基、オクチル基、２−エチルヘキシル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ヘキサデシル基、オクタデシル基等が挙げられる。
当該アルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよい。
Ｒｃとして選択し得る、当該アルキル基の炭素数としては、６〜１８であるが、好ましくは７〜１６、より好ましくは８〜１５、更に好ましくは１０〜１３である。Examples of the alkyl group that can be selected as R c include a hexyl group, a heptyl group, an octyl group, a 2-ethylhexyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group and a hexadecyl group. Examples thereof include an octadecyl group.
The alkyl group may be a straight chain alkyl group or a branched chain alkyl group.
It may be selected as R c, as the number of carbon atoms in the alkyl group, is a 6-18, preferably 7-16, more preferably 8-15, still more preferably from 10 to 13.
Ｒｃとして選択し得る、前記アルケニル基としては、例えば、ヘキセニル基、ヘプテニル基、オクテニル基、ノネニル基、デセニル基、ウンデセニル基、ドデセニル基、トリデセニル基、テトラデセニル基、ヘキサデセニル基、オクタデセニル基等が挙げられる。
当該アルケニル基は、直鎖アルケニル基であってもよく、分岐鎖アルケニル基であってもよい。
Ｒｃとして選択し得る、当該アルケニル基の炭素数としては、６〜１８であるが、好ましくは７〜１６、より好ましくは８〜１５、更に好ましくは１０〜１３である。May be selected as R c, examples of the alkenyl group, for example, include hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tetradecenyl group, such as hexadecenyl group, octadecenyl group Be done.
The alkenyl group may be a straight chain alkenyl group or a branched chain alkenyl group.
The carbon number of the alkenyl group that can be selected as R c is 6 to 18, preferably 7 to 16, more preferably 8 to 15, and even more preferably 10 to 13.
Ｒｃとして選択し得る、前記アリール基としては、例えば、フェニル基、ナフチル基、アントリル基、フェナントリル基、ビフェニル基、ターフェニル基、フェニルナフチル基等が挙げられる。
Ｒｃとして選択し得る、当該アリール基の炭素数としては、６〜１８であるが、好ましくは６〜１６、より好ましくは６〜１４である。Examples of the aryl group that can be selected as R c include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a biphenyl group, a terphenyl group, a phenylnaphthyl group and the like.
It may be selected as R c, as the carbon number of the aryl group, but 6 to 18, preferably 6 to 16, more preferably 6 to 14.
Ｒｃとして選択し得る、前記アリールアルキル基としては、上述のアルキル基が有する水素原子が上述のアリール基に置換された基が挙げられ、具体的には、フェニルメチル基、フェニルエチル等が挙げられる。
Ｒｃとして選択し得る、当該アリールアルキル基の炭素数としては、７〜１８であるが、好ましくは７〜１６、より好ましくは８〜１４である。 Examples of the arylalkyl group that can be selected as R c include a group in which the hydrogen atom of the above-mentioned alkyl group is substituted with the above-mentioned aryl group, and specific examples thereof include a phenylmethyl group and phenylethyl. Be done.
It may be selected as R c, as the number of carbon atoms in the arylalkyl group, is a 7 to 18, preferably 7 to 16, more preferably 8 to 14.
Ｒｃとして選択し得る、前記ヒドロキシアルキル基としては、上述のアルキル基が有する水素原子がヒドロキシ基に置換された基が挙げられ、具体的には、ヒドロキシヘキシル基、ヒドロキシオクチル基、ヒドロキシドデシル基、ヒドロキシトリデシル基等が挙げられる。
Ｒｃとして選択し得る、当該ヒドロキシアルキル基の炭素数としては、６〜１８であるが、好ましくは７〜１６、より好ましくは８〜１５、更に好ましくは１０〜１３である。 Examples of the hydroxyalkyl group that can be selected as R c include a group in which the hydrogen atom of the above-mentioned alkyl group is substituted with a hydroxy group, and specifically, a hydroxyhexyl group, a hydroxyoctyl group, and a hydroxydodecyl group. , Hydroxytridecyl group and the like.
The hydroxyalkyl group, which can be selected as R c , has 6 to 18 carbon atoms, preferably 7 to 16, more preferably 8 to 15, and even more preferably 10 to 13.
[硫黄−リン系化合物（Ｄ４）]
硫黄−リン系化合物（Ｄ４）としては、モノチオリン酸エステル、ジチオリン酸エステル、トリチオリン酸エステル、モノチオリン酸エステルのアミン塩、ジチオリン酸エステルのアミン塩、モノチオ亜リン酸エステル、ジチオ亜リン酸エステル、トリチオ亜リン酸エステルなどが挙げられ、これらの中では、ジチオリン酸エステルが好ましい。
また、耐摩耗性をより良好にする観点から、ジチオリン酸エステルの中でも、末端にカルボキシル基あるいはエステル残基を有するジチオリン酸エステルが好ましい。硫黄−リン系化合物（Ｄ４）は、末端にカルボキシル基やエステル残基を有することで極性が高くなるため、上記した特定のエステル系合成基油（Ａ）を基油として使用する本実施形態においても、極圧剤としての機能を発揮しやすくなる。[Sulfur-phosphorus compound (D4)]
Examples of the sulfur-phosphorus compound (D4) include monothiophosphate ester, dithiophosphate ester, trithiophosphate ester, monothiophosphate amine salt, dithiophosphate amine salt, monothiophosphate ester, dithiophosphate ester, and trithio. Examples thereof include phosphite ester, and among these, dithiophosphate ester is preferable.
Further, from the viewpoint of improving the wear resistance, among the dithiophosphates, a dithiophosphate having a carboxyl group or an ester residue at the terminal is preferable. Since the sulfur-phosphorus compound (D4) has a carboxyl group or an ester residue at the terminal to increase the polarity, in the present embodiment in which the above-mentioned specific ester-based synthetic base oil (A) is used as the base oil. However, it becomes easier to exert the function as an extreme pressure agent.
末端にカルボキシル基あるいはエステル残基を有するジチオリン酸エステルの具体例としては、以下の一般式（ｄ４）で示される化合物が挙げられる。
式（ｄ４）において、Ｒｄは炭素数１〜８の直鎖又は分岐のアルキレン基を表し、Ｒｅ及びＲｆはそれぞれ独立に炭素数１〜２０の炭化水素基を表す。またＲｇは水素原子又は炭素数１〜１０の炭化水素基を表す。Specific examples of the dithiophosphate ester having a carboxyl group or an ester residue at the terminal include a compound represented by the following general formula (d4).
In formula (d4), R d represents a linear or branched alkylene group having 1 to 8 carbon atoms, a hydrocarbon group having 1 to 20 carbon atoms in each of R e and R f independently. R g represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
式（ｄ４）においては、Ｒｄは、基油に対する溶解性を良好にする観点から、直鎖又は分岐の炭素数１〜８のアルキレン基であることが好ましく、直鎖又は分岐の炭素数２〜４のアルキレン基であることがより好ましく、炭素数２のアルキレン基又は分岐の炭素数３〜４のアルキレン基であることが更に好ましい。具体的には、−ＣＨ2ＣＨ2−、−ＣＨ2ＣＨ（ＣＨ3）−、−ＣＨ2ＣＨ（ＣＨ2ＣＨ3）−、−ＣＨ2ＣＨ（ＣＨ3）ＣＨ2−、及び−ＣＨ2ＣＨ（ＣＨ2ＣＨ2ＣＨ3）−等が好ましく挙げられ、−ＣＨ2ＣＨ2−、−ＣＨ2ＣＨ（ＣＨ3）−、−ＣＨ2ＣＨ（ＣＨ3）ＣＨ2−がより好ましく、−ＣＨ2ＣＨ2−、−ＣＨ2ＣＨ（ＣＨ3）−がさらに好ましい。In the formula (d4), R d is preferably a linear or branched alkylene group having 1 to 8 carbon atoms from the viewpoint of improving the solubility in the base oil, and the linear or branched carbon number is 2. It is more preferably an alkylene group having ~ 4 carbon atoms, and further preferably an alkylene group having 2 carbon atoms or a branched alkylene group having 3 to 4 carbon atoms. Specifically, −CH 2 CH 2 −, −CH 2 CH (CH 3 ) −, −CH 2 CH (CH 2 CH 3 ) −, −CH 2 CH (CH 3 ) CH 2 −, and −CH 2 CH (CH 2 CH 2 CH 3 ) − etc. are preferably mentioned, −CH 2 CH 2 −, −CH 2 CH (CH 3 ) −, −CH 2 CH (CH 3 ) CH 2 − are more preferable, and −CH 2 CH 2 − and −CH 2 CH (CH 3 ) − are more preferable.
Ｒｅ及びＲｆそれぞれは、極圧性能を良好なものとしつつ、基油に対する溶解性を良好にする観点から、直鎖又は分岐の炭素数１〜８のアルキル基が好ましく、直鎖又は分岐の炭素数３〜６のアルキル基がより好ましい。具体的には、プロピル、イソプロピル、ブチル、イソブチル、ｔ−ブチル、ペンチル、イソペンチル、ヘキシル、２−エチルブチル、１−メチルペンチル、１，３−ジメチルブチルおよび２−エチルヘキシルの各基からなる群より選ばれるように選択されることが好ましく、これらのうち、イソプロピル、イソブチル、ｔ−ブチルが更に好ましい。Each R e and R f, while the extreme pressure performance and favorable, from the viewpoint of improving the solubility in the base oil is preferably a linear or branched alkyl group having 1 to 8 carbon atoms, straight-chain or branched Alkyl groups having 3 to 6 carbon atoms are more preferable. Specifically, it is selected from the group consisting of propyl, isopropyl, butyl, isobutyl, t-butyl, pentyl, isopentyl, hexyl, 2-ethylbutyl, 1-methylpentyl, 1,3-dimethylbutyl and 2-ethylhexyl groups. Of these, isopropyl, isobutyl, and t-butyl are more preferable.
またＲｇは、極圧性能や基油に対する溶解性を良好なものとする観点から、水素原子又は、直鎖あるいは分岐の炭素数１〜４のアルキル基が好ましい。具体的には、水素原子、メチル、エチル、プロピル、イソプロピル、ブチル、イソブチルおよびｔ−ブチルの各基が好ましく、これらのうち、水素原子、メチル基、エチル基が更に好ましい。Further, R g is preferably a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms from the viewpoint of improving extreme pressure performance and solubility in a base oil. Specifically, each group of hydrogen atom, methyl, ethyl, propyl, isopropyl, butyl, isobutyl and t-butyl is preferable, and among these, a hydrogen atom, a methyl group and an ethyl group are more preferable.
＜他の潤滑油用添加剤＞
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、上述の成分（Ｂ）〜（Ｄ）以外の他の潤滑油用添加剤を含有してもよい。
このような潤滑油用添加剤としては、例えば、防錆剤、清浄分散剤、粘度指数向上剤、消泡剤、摩擦調整剤、金属不活性化剤等が挙げられる。
これらの潤滑油用添加剤は、単独で用いてもよく、２種以上を併用してもよい。<Additives for other lubricating oils>
The lubricating oil composition of one aspect of the present invention may contain additives for lubricating oil other than the above-mentioned components (B) to (D) as long as the effects of the present invention are not impaired.
Examples of such additives for lubricating oil include rust preventives, detergent dispersants, viscosity index improvers, defoamers, friction modifiers, metal inactivating agents and the like.
These additives for lubricating oil may be used alone or in combination of two or more.
これらの潤滑油用添加剤を配合する場合、潤滑油用添加剤のそれぞれの含有量は、本発明の効果を損なわない範囲内で、添加剤の種類に応じて適宜調整されるが、潤滑油組成物の全量（１００質量％）基準で、通常０．００１〜１０質量％、好ましくは０．００５〜５質量％、より好ましくは０．０１〜２質量％である。 When these additives for lubricating oil are blended, the content of each of the additives for lubricating oil is appropriately adjusted according to the type of additive within a range not impairing the effect of the present invention, but lubricating oil Based on the total amount (100% by mass) of the composition, it is usually 0.001 to 10% by mass, preferably 0.005 to 5% by mass, and more preferably 0.01 to 2% by mass.
ＰＡＧやＰＯＥ等の基油に、アルケニルコハク酸エステルを配合してなる潤滑油組成物は、水分離性の低下も招く。
しかしながら、本発明の潤滑油組成物では、アルケニルコハク酸エステルと相溶性が良好である鉱油（Ａ）を含有しているため、アルケニルコハク酸エステルが有する防錆性を効果的に発現させることができる。また、アルケニルコハク酸エステルを配合しても、良好な水分離性を有する潤滑油組成物とすることができる。A lubricating oil composition obtained by blending an alkenyl succinic acid ester with a base oil such as PAG or POE also causes a decrease in water separability.
However, since the lubricating oil composition of the present invention contains the mineral oil (A) having good compatibility with the alkenyl succinic acid ester, the rust preventive property of the alkenyl succinic acid ester can be effectively exhibited. it can. Further, even if an alkenyl succinic acid ester is blended, a lubricating oil composition having good water separability can be obtained.
本発明の一態様の潤滑油組成物において、アルケニルコハク酸エステルの含有量としては、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは０．００１〜５．０質量％、より好ましくは０．００５〜２．０質量％、更に好ましくは０．０１〜１．０質量％、より更に好ましくは０．０２〜０．５０質量％である。 In the lubricating oil composition of one aspect of the present invention, the content of the alkenyl succinate is preferably 0.001 to 5.0% by mass based on the total amount (100% by mass) of the lubricating oil composition. It is preferably 0.005 to 2.0% by mass, more preferably 0.01 to 1.0% by mass, and even more preferably 0.02 to 0.50% by mass.
また、本発明の一態様の潤滑油組成物において、高温環境下で長期間の使用に伴い発生するスラッジを抑制する観点から、金属原子含有化合物を実質的に含有しないことが好ましい。
ここで、「金属原子含有化合物」が含有する金属原子とは、アルカリ金属原子、アルカリ土類原子、遷移金属原子を指す。Further, it is preferable that the lubricating oil composition of one aspect of the present invention does not substantially contain a metal atom-containing compound from the viewpoint of suppressing sludge generated by long-term use in a high temperature environment.
Here, the metal atom contained in the "metal atom-containing compound" refers to an alkali metal atom, an alkaline earth atom, and a transition metal atom.
なお、本明細書において、「金属原子含有化合物を実質的に含有しない」とは、所定の目的をもって、金属原子含有化合物を含有させる態様を否定する規定であって、金属原子含有化合物が不純物として含有する場合まで否定する規定ではない。
ただし、不純物として含まれる金属原子含有化合物の含有量についても、極力少ない程好ましい。In addition, in this specification, "substantially free of a metal atom-containing compound" is a provision denying the mode of containing a metal atom-containing compound for a predetermined purpose, and the metal atom-containing compound is used as an impurity. It is not a rule to deny even if it is contained.
However, the content of the metal atom-containing compound contained as an impurity is also preferably as small as possible.
本発明の一態様の潤滑油組成物において、金属原子の含有量としては、高温環境下で長期間の使用に伴い発生するスラッジを抑制する観点から、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは１００質量ｐｐｍ未満、より好ましくは５０質量ｐｐｍ未満、更に好ましくは１０質量ｐｐｍ未満、より更に好ましくは５質量ｐｐｍ未満である。
本明細書において、金属原子の含有量は、ＪＰＩ−５Ｓ−３８−９２に準拠して測定した値を意味する。In the lubricating oil composition of one aspect of the present invention, the content of metal atoms is the total amount (100% by mass) of the lubricating oil composition from the viewpoint of suppressing sludge generated by long-term use in a high temperature environment. ) By reference, it is preferably less than 100 mass ppm, more preferably less than 50 mass ppm, still more preferably less than 10 mass ppm, still more preferably less than 5 mass ppm.
In the present specification, the content of a metal atom means a value measured according to JPI-5S-38-92.
〔潤滑油組成物の各種物性〕
本発明の一態様の潤滑油組成物の４０℃における動粘度は、好ましくは５〜３００ｍｍ２／ｓ、より好ましくは１０〜２００ｍｍ２／ｓ、更に好ましくは１５〜１００ｍｍ２／ｓである。[Various physical characteristics of lubricating oil composition]
Kinematic viscosity at 40 ° C. for one embodiment of the lubricating oil composition of the present invention is preferably 5~300mm 2 / s, more preferably 10 to 200 mm 2 / s, more preferably 15~100mm 2 / s.
本発明の一態様の潤滑油組成物の粘度指数は、好ましくは９０以上、より好ましくは１００以上、更に好ましくは１０５以上、より更に好ましくは１１０以上である。 The viscosity index of the lubricating oil composition according to one aspect of the present invention is preferably 90 or more, more preferably 100 or more, still more preferably 105 or more, still more preferably 110 or more.
本発明の一態様の潤滑油組成物に対して、ＡＳＴＭ Ｄ７８７３の酸化安定性試験（Ｄｒｙ−ＴＯＳＴ法）に準拠して測定した、１２０℃の環境下での、試験開始から９６０時間後のスラッジ生成量としては、好ましく１．０ｍｇ／１００ｍｌ以下、より好ましく０．７ｍｇ／１００ｍｌ以下、更に好ましく０．５ｍｇ／１００ｍｌ以下である。
なお、当該スラッジ生成量は、ＡＳＴＭ Ｄ７８７３に準拠し、平均孔径１．０μｍのメンブランフィルターを用いて測定した値である。Sludge 960 hours after the start of the test in an environment of 120 ° C. measured according to the oxidation stability test (Dry-TOST method) of ASTM D7873 for the lubricating oil composition of one aspect of the present invention. The amount produced is preferably 1.0 mg / 100 ml or less, more preferably 0.7 mg / 100 ml or less, still more preferably 0.5 mg / 100 ml or less.
The sludge generation amount is a value measured using a membrane filter having an average pore size of 1.0 μm in accordance with ASTM D7873.
本発明の一態様の潤滑油組成物に対して、ＡＳＴＭ Ｄ７８７３の酸化安定性試験（Ｄｒｙ−ＴＯＳＴ法）に準拠して測定した、１２０℃の環境下での、試験開始から９６０時間後のＲＰＶＯＴ残存率としては、好ましくは６５％以上、より好ましくは７０％以上、更に好ましくは７２％以上である。
なお、ＲＰＶＯＴ残存率は、下記の式より算出された値である。
・［ＲＰＶＯＴ残存率］（％）＝［試験後のサンプルのＲＰＶＯＴ時間］／［試験前のサンプルのＲＰＶＯＴ時間］×１００The lubricating oil composition according to one aspect of the present invention was measured according to the oxidation stability test (Dry-TOST method) of ASTM D7873, and RPVOT was measured in an environment of 120 ° C. 960 hours after the start of the test. The residual rate is preferably 65% or more, more preferably 70% or more, still more preferably 72% or more.
The RPVOT residual rate is a value calculated from the following formula.
[RPVOT residual rate] (%) = [RPVOT time of sample after test] / [RPVOT time of sample before test] x 100
本発明の一態様の潤滑油組成物に対して、ＪＩＳ Ｋ２５２０に準拠し、温度５４℃における水分離性試験を行った際、乳化層が３ｍＬに到達するまでの時間を表す抗乳化度としては、好ましくは１５分以下、より好ましくは１０分以下、更に好ましくは５分以下である。 When the lubricating oil composition of one aspect of the present invention is subjected to a water separability test at a temperature of 54 ° C. in accordance with JIS K2520, the degree of anti-emulsification indicating the time required for the emulsified layer to reach 3 mL is defined as the degree of anti-emulsification. It is preferably 15 minutes or less, more preferably 10 minutes or less, still more preferably 5 minutes or less.
本発明の一態様の潤滑油組成物について、後述の実施例の測定条件に基づいて測定されたトラクション係数としては、好ましくは０．０２０以下、より好ましくは０．０１８以下である。 With respect to the lubricating oil composition of one aspect of the present invention, the traction coefficient measured based on the measurement conditions of Examples described later is preferably 0.020 or less, more preferably 0.018 or less.
〔潤滑油組成物の用途、潤滑方法〕
本発明の潤滑油組成物は、ターボ機械、圧縮機（冷凍機を除く）、油圧機器、又は工作機械に用いられるものである。
具体的には、本発明の一態様の潤滑油組成物は、ポンプ、真空ポンプ、送風機、ターボ圧縮機、蒸気タービン、原子力タービン、ガスタービン、水力発電用タービン等のターボ機械の潤滑に用いられるターボ機械用潤滑油（ポンプ油、タービン油等）；回転式圧縮機、往復動式圧縮機等の圧縮機の潤滑に用いられる軸受油、ギヤ油及び制御系作動油；油圧機器に用いられる油圧作動油；工作機械の油圧ユニットに用いられる工作機械用潤滑油；等として好適に使用し得る。[Use of lubricating oil composition, lubrication method]
The lubricating oil composition of the present invention is used for turbomachinery, compressors (excluding refrigerators), hydraulic equipment, or machine tools.
Specifically, the lubricating oil composition according to one aspect of the present invention is used for lubricating turbo machinery such as pumps, vacuum pumps, blowers, turbo compressors, steam turbines, nuclear turbines, gas turbines, and turbines for hydropower generation. Lubricating oil for turbo machinery (pump oil, turbine oil, etc.); Bearing oil, gear oil and control system hydraulic oil used to lubricate compressors such as rotary compressors and reciprocating compressors; Flood control used in hydraulic equipment It can be suitably used as a hydraulic oil; a lubricating oil for a machine tool used for a hydraulic unit of a machine machine; and the like.
つまり、本願は、下記〔１〕の使用方法も提供し得る。
〔１〕鉱油（Ａ）と、ポリアルキレングリコール（Ｂ１）及びポリオールエステル（Ｂ２）を含む合成油（Ｂ）とを含有し、鉱油（Ａ）の含有量が５〜９５質量％である潤滑油組成物を、ターボ機械、圧縮機、油圧機器、又は工作機械に用いる、潤滑油組成物の使用方法。
なお、本発明の潤滑油組成物の具体的な構成、並びに、ターボ機械、圧縮機、油圧機器、及び工作機械の具体的な例示は、上述のとおりである。That is, the present application may also provide the usage method of the following [1].
[1] A lubricating oil containing a mineral oil (A) and a synthetic oil (B) containing a polyalkylene glycol (B1) and a polyol ester (B2), and the content of the mineral oil (A) is 5 to 95% by mass. A method of using a lubricating oil composition in which the composition is used in a turbo machine, a compressor, a hydraulic device, or a machine tool.
The specific configuration of the lubricating oil composition of the present invention and specific examples of the turbomachine, compressor, hydraulic equipment, and machine tool are as described above.
次に、実施例により本発明をさらに具体的に説明するが、本発明はこれら実施例に限定されるものではない。 Next, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.
［各種物性値の測定方法］
（１）動粘度、粘度指数
ＪＩＳ Ｋ２２８３：２０００に準拠して測定及び算出した。
（２）数平均分子量（Ｍｎ）
下記の測定条件にて、ゲルパーミエーションクロマトグラフィー（ＧＰＣ）法に準拠し、標準ポリスチレン換算でのＭｎを測定した。
（測定条件）
・ゲル浸透クロマトグラフ装置：アジレント社製、「１２６０型ＨＰＬＣ」
・標準試料：ポリスチレン
・カラム：Ｓｈｏｄｅｘ社製「ＬＦ４０４」を２本、順次連結したもの。
・カラム温度：３５℃
・展開溶媒：クロロホルム
・流速：０．３ｍＬ／ｍｉｎ
（３）リン原子、金属原子の含有量
ＪＰＩ−５Ｓ−３８−９２に準拠して測定した。
（４）窒素原子の含有量
ＪＩＳ Ｋ２６０９に準拠して測定した。[Measurement method of various physical property values]
(1) Kinematic viscosity, viscosity index Measured and calculated according to JIS K2283: 2000.
(2) Number average molecular weight (Mn)
Under the following measurement conditions, Mn in terms of standard polystyrene was measured according to the gel permeation chromatography (GPC) method.
(Measurement condition)
-Gel penetration chromatograph device: "1260 type HPLC" manufactured by Agilent.
-Standard sample: Polystyrene column: Two "LF404" manufactured by Shodex, which are connected in sequence.
-Column temperature: 35 ° C
-Development solvent: Chloroform-Flow velocity: 0.3 mL / min
(3) Content of phosphorus atom and metal atom Measured according to JPI-5S-38-92.
(4) Nitrogen atom content Measured according to JIS K2609.
実施例１〜７、比較例１〜５
下記に示す鉱油、合成油、アミン系酸化防止剤、リン系化合物、及び他の添加剤を、表１に示す配合量にて添加し、十分に混合して、潤滑油組成物（Ｉ）〜（ＶＩＩ）及び（ｉ）〜（ｖ）をそれぞれ調製した。
これらの潤滑油組成物の調製に使用した各成分の詳細は、以下のとおりである。Examples 1-7, Comparative Examples 1-5
The mineral oils, synthetic oils, amine-based antioxidants, phosphorus-based compounds, and other additives shown below are added in the blending amounts shown in Table 1 and mixed thoroughly to prepare the lubricating oil compositions (I). (VII) and (i) to (v) were prepared, respectively.
Details of each component used in the preparation of these lubricating oil compositions are as follows.
（鉱油）
・「１５０Ｎ鉱油」：ＡＰＩの基油カテゴリーのグループ２に分類される鉱油、４０℃動粘度＝３０．６ｍｍ２／ｓ、粘度指数＝１０４。
（合成油）
・「ＰＡＧ」：Ｈ−（ＯＣＨ（ＣＨ３）ＣＨ２）ａ−ＯＣ４Ｈ９で表される、一方の末端がブチルエーテルで封止されたポリプロピレングリコール（前記一般式（ｂ−１）中のＲＢ１が水素原子、ＲＢ２がプロピレン基、ＲＢ３がｎ−ブチル基、ｂが１である化合物）。４０℃動粘度＝３７．２ｍｍ２／ｓ、粘度指数＝１７３、Ｍｎ＝８００。
・「ＰＯＥ」：トリメチロールプロパントリエステル（トリメチロールプロパンと炭素数８〜１０のカルボン酸との完全エステル）。４０℃動粘度＝１９．６ｍｍ２／ｓ、粘度指数＝１３８。
（アミン系酸化防止剤）
・「ナフチルアミン」：ｐ−オクチルフェニル−α−ナフチルアミン、窒素原子含有量＝４．２質量％。
・「ジフェニルアミン」：ビス（ｐ−オクチルフェニル）アミン、前記一般式（ｃ−２）中のＲｘ及びＲｙがオクチル基である化合物、窒素原子含有量＝３．６質量％。
（リン系化合物）
・「中性リン酸エステル」：トリス（ｐ−イソプロピルフェニル）ホスフェート、前記一般式（ｄ１−２）中のｐ１〜ｐ３が１であり、ＲＤ１１〜ＲＤ１３がイソプロピル基であって、当該イソプロピル基がパラ位に結合した化合物。リン原子含有量＝６．８質量％。
・「酸性リン酸エステルアミン」：前記一般式（ｄ２−１）及び前記一般式（ｄ２−２）で表される化合物の混合物と、前記一般式（ｄ３）で表される化合物とのアミン塩（一般式（ｄ２−１）及び一般式（ｄ２−２）におけるＲａ及びＲｂは炭素数８又は１０のアルキル基であり、一般式（ｄ３）におけるＲｃは炭素数１２のアルキル基、ｑは１又は２である）。リン原子含有量＝４．８質量％。
・チオリン酸エステル１：３−ジイソブトキシフォスフィノチオイルサルファニル−２−メチルプロパノイックアシド、リン原子含有量＝９．３質量％。
・チオリン酸エステル２：エチル−３−［｛ビス（１−メチルエトキシ）フォスフィノチオイル｝チオ］プロピオネート、リン原子含有量＝９．９質量％
（他の添加剤）
・「防錆剤」：アルケニルコハク酸のハーフエステル。
・「消泡剤」：シリコーン系消泡剤、アクリル系消泡剤。(Mineral oil)
"150N mineral oil": Mineral oil classified into Group 2 of the API base oil category, 40 ° C. kinematic viscosity = 30.6 mm 2 / s, viscosity index = 104.
(Synthetic oil)
· "PAG": H- (OCH (CH 3) CH 2) represented by a -OC 4 H 9, one end is sealed polypropylene glycol butyl ether (in the general formula (b-1) A compound in which RB1 is a hydrogen atom, RB2 is a propylene group, RB3 is an n-butyl group, and b is 1.) 40 ° C. kinematic viscosity = 37.2 mm 2 / s, viscosity index = 173, Mn = 800.
-"POE": Trimethylolpropane triester (complete ester of trimethylolpropane and a carboxylic acid having 8 to 10 carbon atoms). 40 ° C. kinematic viscosity = 19.6 mm 2 / s, viscosity index = 138.
(Amine-based antioxidant)
-"Naphthylamine": p-octylphenyl-α-naphthylamine, nitrogen atom content = 4.2% by mass.
"Diphenylamine": bis (p-octylphenyl) amine, a compound in which R x and R y in the general formula (c-2) are octyl groups, nitrogen atom content = 3.6% by mass.
(Phosphorus compound)
· "Neutral phosphoric ester": tris (p- isopropylphenyl) phosphate, pi to p3 in the general formula (d1-2) a is 1, R D11 to R D13 is an isopropyl group, the isopropyl A compound in which the group is bonded to the para position. Phosphorus atom content = 6.8% by mass.
"Acid phosphate ester amine": An amine salt of a mixture of the compounds represented by the general formula (d2-1) and the general formula (d2-2) and the compound represented by the general formula (d3). (R a and R b in the general formula (d2-1) and the general formula (d2-2) are alkyl groups having 8 or 10 carbon atoms, and R c in the general formula (d3) is an alkyl group having 12 carbon atoms. q is 1 or 2). Phosphorus atom content = 4.8% by mass.
-Thiophosphate ester 1: 3-diisobutoxyphosphinochi oil sulfanyl-2-methylpropanoic acid, phosphorus atom content = 9.3% by mass.
-Thiophosphate ester 2: Ethyl-3- [{bis (1-methylethoxy) phosphinochi oil} thio] propionate, phosphorus atom content = 9.9% by mass
(Other additives)
-"Rust inhibitor": Half ester of alkenyl succinic acid.
-"Defoaming agent": Silicone-based defoaming agent, acrylic-based defoaming agent.
調製した潤滑油組成物の各々について、表１及び２に示す各種物性値を上述の方法に基づき測定すると共に、以下の試験を行って、潤滑油組成物の各種性状を評価した。これらの結果を表１及び２に示す。 For each of the prepared lubricating oil compositions, various physical property values shown in Tables 1 and 2 were measured based on the above-mentioned method, and the following tests were performed to evaluate various properties of the lubricating oil composition. These results are shown in Tables 1 and 2.
（１）酸化安定性試験（Ｄｒｙ−ＴＯＳＴ）
ＡＳＴＭ Ｄ７８７３の酸化安定性試験（Ｄｒｙ−ＴＯＳＴ）に準拠して、１２０℃の環境下で、試験開始から９６０時間後のスラッジ生成量及びＲＰＶＯＴ残存率を測定した。
なお、スラッジ生成量は、ＡＳＴＭ Ｄ７８７３に準拠し、平均孔径１．０μｍのミリポア社のメンブランフィルターを用いて測定した。
また、ＲＰＶＯＴ残存率は、下記の式より算出した。
・［ＲＰＶＯＴ残存率］（％）＝［試験後のサンプルのＲＰＶＯＴ時間］／［試験前のサンプルのＲＰＶＯＴ時間］×１００(1) Oxidation stability test (Dry-TOST)
According to the oxidation stability test (Dry-TOST) of ASTM D7873, the sludge formation amount and RPVOT residual rate after 960 hours from the start of the test were measured in an environment of 120 ° C.
The amount of sludge generated was measured using a membrane filter manufactured by Millipore with an average pore size of 1.0 μm in accordance with ASTM D7873.
The RPVOT residual rate was calculated from the following formula.
[RPVOT residual rate] (%) = [RPVOT time of sample after test] / [RPVOT time of sample before test] x 100
（２）水分離性試験
ＪＩＳ Ｋ２５２０に準拠し、温度５４℃における水分離性試験を行い、乳化層が３ｍＬに到達する時間（抗乳化度、単位：分）を測定した。(2) Water Separability Test A water separability test was conducted at a temperature of 54 ° C. in accordance with JIS K2520, and the time (anti-emulsification degree, unit: minutes) for the emulsified layer to reach 3 mL was measured.
（３）トラクション係数の測定
ＥＨＤ油膜測定器（ＰＣＳ Ｉｎｓｔｕｍｅｎｔａｌ社製）を用いて、下記の測定条件にて、トラクション係数を測定した。
・ディスク：直径４６ｍｍ、ＳＡＥ ＡＩＳＩ５２１００鋼
・ボール：直径１９ｍｍ、ＳＡＥ ＡＩＳＩ５２１００鋼
・荷重：２０Ｎ
・転がり速度：２．０ｍ／ｓ
・油温：６０℃
・すべり率：１０％(3) Measurement of traction coefficient The traction coefficient was measured under the following measurement conditions using an EHD oil film measuring device (manufactured by PCS Instrumental Co., Ltd.).
-Disc: 46 mm in diameter, SAE AISI52100 steel-Ball: 19 mm in diameter, SAE AISI52100 steel-Load: 20N
・ Rolling speed: 2.0m / s
・ Oil temperature: 60 ° C
・ Slip rate: 10%
（４）耐摩耗性試験
ＦＺＧギヤ試験機を用い、ＩＳＯ １４６３５−１に準拠し、規定に沿って段階的に荷重を上げ、スコーリングが発生した荷重のステージを評価した。荷重のステージが高いほど、耐スコーリング性に優れることを示す。(4) Abrasion resistance test Using an FZG gear tester, the load was gradually increased according to the regulations in accordance with ISO 14635-1, and the stage of the load in which scoring occurred was evaluated. The higher the load stage, the better the scoring resistance.
実施例１〜７で調製した潤滑油組成物は、酸化安定性に優れており、スラッジ析出の抑制効果が高く、また、優れた水分離性を有する結果となった。また、トラクション係数も低く、耐摩耗性の向上効果も見られた。
一方、比較例１で調製した潤滑油組成物は、酸化安定性が劣り、実施例に比べて、スラッジ生成量が多く、ＲＰＶＯＴ残存率も低い結果となった。また、耐摩耗性の観点からも不十分である。
また、比較例２、３、４、５で調製した潤滑油組成物は、酸化安定性及び耐摩耗性は良好であるが、水分離性が劣り、これらの中でも比較例４は酸化安定性が特に悪く、スラッジ生成量がかなり多い結果となった。The lubricating oil compositions prepared in Examples 1 to 7 were excellent in oxidative stability, had a high effect of suppressing sludge precipitation, and had excellent water separability. In addition, the traction coefficient was low, and the effect of improving wear resistance was also observed.
On the other hand, the lubricating oil composition prepared in Comparative Example 1 was inferior in oxidative stability, produced a large amount of sludge, and had a low residual rate of RPVOT as compared with Examples. Moreover, it is insufficient from the viewpoint of wear resistance.
Further, the lubricating oil compositions prepared in Comparative Examples 2, 3, 4, and 5 have good oxidative stability and abrasion resistance, but are inferior in water separability, and among these, Comparative Example 4 has oxidative stability. It was particularly bad, and the result was that the amount of sludge generated was quite large.
Claims (10)
鉱油（Ａ）の含有量が、前記潤滑油組成物の全量基準で、５〜９５質量％であり、
ターボ機械、圧縮機、油圧機器、又は工作機械に用いられる、潤滑油組成物。A lubricating oil composition containing a mineral oil (A) and a synthetic oil (B) containing a polyalkylene glycol (B1) and a polyol ester (B2).
The content of the mineral oil (A) is 5 to 95% by mass based on the total amount of the lubricating oil composition.
Lubricating oil composition used in turbomachinery, compressors, hydraulic equipment, or machine tools.
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| EP0524783A1 (en) * | 1991-07-23 | 1993-01-27 | Oceanfloor Limited | Use of lubricating oil compositions |
| JP2011516637A (en) * | 2008-03-31 | 2011-05-26 | エクソンモービル リサーチ アンド エンジニアリング カンパニー | Improved varnish-resistant lubricating oil composition |
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