JP6130818B2 - Lubricating base oil and lubricating oil composition - Google Patents
Lubricating base oil and lubricating oil composition Download PDFInfo
- Publication number
- JP6130818B2 JP6130818B2 JP2014205908A JP2014205908A JP6130818B2 JP 6130818 B2 JP6130818 B2 JP 6130818B2 JP 2014205908 A JP2014205908 A JP 2014205908A JP 2014205908 A JP2014205908 A JP 2014205908A JP 6130818 B2 JP6130818 B2 JP 6130818B2
- Authority
- JP
- Japan
- Prior art keywords
- lubricating
- base oil
- lubricating oil
- carbon atoms
- oil composition
- 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.)
- Active
Links
- 239000010687 lubricating oil Substances 0.000 title claims description 119
- 239000000203 mixture Substances 0.000 title claims description 112
- 239000002199 base oil Substances 0.000 title claims description 87
- 230000001050 lubricating effect Effects 0.000 title claims description 73
- 125000004432 carbon atom Chemical group C* 0.000 claims description 31
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 25
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 17
- -1 ester compound Chemical class 0.000 claims description 16
- 125000000217 alkyl group Chemical group 0.000 claims description 14
- 239000003963 antioxidant agent Substances 0.000 claims description 9
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- 229930195733 hydrocarbon Natural products 0.000 claims description 5
- 150000002430 hydrocarbons Chemical class 0.000 claims description 5
- 239000002480 mineral oil Substances 0.000 claims description 5
- 235000010446 mineral oil Nutrition 0.000 claims description 5
- 150000005691 triesters Chemical class 0.000 claims description 5
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 4
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- 150000001412 amines Chemical class 0.000 claims description 4
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 4
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 claims description 4
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 4
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims description 2
- 239000001361 adipic acid Substances 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 150000001735 carboxylic acids Chemical class 0.000 claims 3
- 230000000052 comparative effect Effects 0.000 description 30
- 230000008020 evaporation Effects 0.000 description 29
- 238000001704 evaporation Methods 0.000 description 29
- 229940125904 compound 1 Drugs 0.000 description 25
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 229940125782 compound 2 Drugs 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 description 4
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 4
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- VJHINFRRDQUWOJ-UHFFFAOYSA-N dioctyl sebacate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCC(=O)OCC(CC)CCCC VJHINFRRDQUWOJ-UHFFFAOYSA-N 0.000 description 3
- 150000001261 hydroxy acids Chemical class 0.000 description 3
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- BBMCTIGTTCKYKF-UHFFFAOYSA-N 1-heptanol Chemical compound CCCCCCCO BBMCTIGTTCKYKF-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- KBPLFHHGFOOTCA-UHFFFAOYSA-N caprylic alcohol Natural products CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- 150000005690 diesters Chemical class 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 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
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- ZWRUINPWMLAQRD-UHFFFAOYSA-N nonan-1-ol Chemical compound CCCCCCCCCO ZWRUINPWMLAQRD-UHFFFAOYSA-N 0.000 description 2
- AICOOMRHRUFYCM-ZRRPKQBOSA-N oxazine, 1 Chemical compound C([C@@H]1[C@H](C(C[C@]2(C)[C@@H]([C@H](C)N(C)C)[C@H](O)C[C@]21C)=O)CC1=CC2)C[C@H]1[C@@]1(C)[C@H]2N=C(C(C)C)OC1 AICOOMRHRUFYCM-ZRRPKQBOSA-N 0.000 description 2
- 239000002530 phenolic antioxidant Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KJIOQYGWTQBHNH-UHFFFAOYSA-N undecanol Chemical compound CCCCCCCCCCCO KJIOQYGWTQBHNH-UHFFFAOYSA-N 0.000 description 2
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 description 1
- DHTAIMJOUCYGOL-UHFFFAOYSA-N 2-ethyl-n-(2-ethylhexyl)-n-[(4-methylbenzotriazol-1-yl)methyl]hexan-1-amine Chemical compound C1=CC=C2N(CN(CC(CC)CCCC)CC(CC)CCCC)N=NC2=C1C DHTAIMJOUCYGOL-UHFFFAOYSA-N 0.000 description 1
- FOKDITTZHHDEHD-PFONDFGASA-N 2-ethylhexyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(CC)CCCC FOKDITTZHHDEHD-PFONDFGASA-N 0.000 description 1
- SFAAOBGYWOUHLU-UHFFFAOYSA-N 2-ethylhexyl hexadecanoate Chemical compound CCCCCCCCCCCCCCCC(=O)OCC(CC)CCCC SFAAOBGYWOUHLU-UHFFFAOYSA-N 0.000 description 1
- OPJWPPVYCOPDCM-UHFFFAOYSA-N 2-ethylhexyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CC)CCCC OPJWPPVYCOPDCM-UHFFFAOYSA-N 0.000 description 1
- GRXOKLJPWSYWIA-UHFFFAOYSA-N 2-ethylhexyl tetradecanoate Chemical compound CCCCCCCCCCCCCC(=O)OCC(CC)CCCC GRXOKLJPWSYWIA-UHFFFAOYSA-N 0.000 description 1
- XULHFMYCBKQGEE-UHFFFAOYSA-N 2-hexyl-1-Decanol Chemical compound CCCCCCCCC(CO)CCCCCC XULHFMYCBKQGEE-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
- UJAWGGOCYUPCPS-UHFFFAOYSA-N 4-(2-phenylpropan-2-yl)-n-[4-(2-phenylpropan-2-yl)phenyl]aniline Chemical compound C=1C=C(NC=2C=CC(=CC=2)C(C)(C)C=2C=CC=CC=2)C=CC=1C(C)(C)C1=CC=CC=C1 UJAWGGOCYUPCPS-UHFFFAOYSA-N 0.000 description 1
- VGNVYUTVJIIORC-UHFFFAOYSA-N 6-tert-butyl-4-[(3-tert-butyl-4-hydroxy-1-methylcyclohexa-2,4-dien-1-yl)methyl]-4-methylcyclohexa-1,5-dien-1-ol Chemical compound C1C=C(O)C(C(C)(C)C)=CC1(C)CC1(C)C=C(C(C)(C)C)C(O)=CC1 VGNVYUTVJIIORC-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- UUNBFTCKFYBASS-UHFFFAOYSA-N C(CCCCCCC)C=1C(=C(C=CC1)NC1=CC=CC=C1)CCCCCCCC Chemical compound C(CCCCCCC)C=1C(=C(C=CC1)NC1=CC=CC=C1)CCCCCCCC UUNBFTCKFYBASS-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- ABRVLXLNVJHDRQ-UHFFFAOYSA-N [2-pyridin-3-yl-6-(trifluoromethyl)pyridin-4-yl]methanamine Chemical compound FC(C1=CC(=CC(=N1)C=1C=NC=CC=1)CN)(F)F ABRVLXLNVJHDRQ-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- SAOKZLXYCUGLFA-UHFFFAOYSA-N bis(2-ethylhexyl) adipate Chemical compound CCCCC(CC)COC(=O)CCCCC(=O)OCC(CC)CCCC SAOKZLXYCUGLFA-UHFFFAOYSA-N 0.000 description 1
- ZDWGXBPVPXVXMQ-UHFFFAOYSA-N bis(2-ethylhexyl) nonanedioate Chemical compound CCCCC(CC)COC(=O)CCCCCCCC(=O)OCC(CC)CCCC ZDWGXBPVPXVXMQ-UHFFFAOYSA-N 0.000 description 1
- FTALILOVQKMLBH-UHFFFAOYSA-N bis(2-ethylhexyl) octanedioate Chemical compound CCCCC(CC)COC(=O)CCCCCCC(=O)OCC(CC)CCCC FTALILOVQKMLBH-UHFFFAOYSA-N 0.000 description 1
- ISQGOXKDLGVOKQ-UHFFFAOYSA-N bis(3,5,5-trimethylhexyl) hexanedioate Chemical compound CC(C)(C)CC(C)CCOC(=O)CCCCC(=O)OCCC(C)CC(C)(C)C ISQGOXKDLGVOKQ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical class C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- XJNUECKWDBNFJV-UHFFFAOYSA-N hexadecyl 2-ethylhexanoate Chemical compound CCCCCCCCCCCCCCCCOC(=O)C(CC)CCCC XJNUECKWDBNFJV-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 125000003136 n-heptyl 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])* 0.000 description 1
- PIUVNPNBPWVVKZ-UHFFFAOYSA-N octadecyl 2-ethylhexanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(CC)CCCC PIUVNPNBPWVVKZ-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 1
- YYVIVUWGOOIWIF-UHFFFAOYSA-N tetradecyl 2-ethylhexanoate Chemical compound CCCCCCCCCCCCCCOC(=O)C(CC)CCCC YYVIVUWGOOIWIF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lubricants (AREA)
Description
本発明は、潤滑油基油と、当該潤滑油基油を含む潤滑油組成物に関する。 The present invention relates to a lubricating base oil and a lubricating oil composition containing the lubricating base oil.
家電、事務機器、電子情報機器、工業用機械、携帯端末等の電子機器における小型化、低消費電力化は年々進んでいる。また、これらの電子機器の使用可能な温度範囲も年々拡大している。これにともない、これらの電子機器に用いられるディスク駆動装置等には、流体軸受（流体動圧軸受）等を搭載したスピンドルモータが使用されるようになった。 Miniaturization and low power consumption of electronic devices such as home appliances, office equipment, electronic information devices, industrial machines, and portable terminals are progressing year by year. In addition, the usable temperature range of these electronic devices is expanding year by year. Accordingly, a spindle motor equipped with a fluid bearing (fluid dynamic pressure bearing) or the like has been used for a disk drive device or the like used in these electronic devices.
これらの電子機器の小型化、低消費電力化や使用可能温度範囲の拡大は、モータの性能向上によるものが大きい。モータの性能向上を実現する手段の一つとしては、モータに搭載された軸受の性能を高めることがあり、軸受の性能向上を図るために種々の潤滑油組成物が提案されている（例えば、特許文献１参照）。 The downsizing, low power consumption, and expansion of the usable temperature range of these electronic devices are largely due to improvement in motor performance. One means for improving the performance of the motor is to increase the performance of the bearing mounted on the motor, and various lubricating oil compositions have been proposed to improve the performance of the bearing (for example, Patent Document 1).
近年、電子機器に使用される潤滑油組成物には、要求される粘度を保持しながら、良好な温度特性と寿命とを兼ね備えることがますます求められている。本発明者は、従来の潤滑油組成物について鋭意研究を重ねた結果、従来の潤滑油組成物には上述した要求を満たす上で改善の余地があることを見出した。 In recent years, lubricating oil compositions used in electronic devices are increasingly required to have good temperature characteristics and longevity while maintaining the required viscosity. As a result of intensive studies on the conventional lubricating oil composition, the present inventor has found that the conventional lubricating oil composition has room for improvement in satisfying the above-described requirements.
本発明はこうした状況に鑑みてなされたものであり、その目的は、潤滑油組成物の粘度を保持しながら、良好な温度特性と寿命とを付与する技術を提供することにある。 This invention is made | formed in view of such a condition, The objective is to provide the technique which provides a favorable temperature characteristic and a lifetime, maintaining the viscosity of a lubricating oil composition.
本発明のある態様は、潤滑油基油である。この潤滑油基油は、下記式（１）で表されるエーテル結合含有エステル化合物を含む。
この態様によれば、要求される粘度を保持しながら、潤滑油組成物に良好な温度特性と寿命とを付与することができる。 According to this aspect, it is possible to impart good temperature characteristics and life to the lubricating oil composition while maintaining the required viscosity.
本発明の他の態様は、潤滑油組成物である。この潤滑油組成物は、上記態様の潤滑油基油（Ａ）を含む。 Another aspect of the present invention is a lubricating oil composition. This lubricating oil composition contains the lubricating base oil (A) of the above embodiment.
本発明によれば、潤滑油組成物の粘度を保持しながら、良好な温度特性と寿命とを付与する技術を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the technique which provides a favorable temperature characteristic and lifetime while maintaining the viscosity of a lubricating oil composition can be provided.
以下、本発明を好適な実施の形態をもとに説明する。実施の形態は、発明を限定するものではなく例示であって、実施の形態に記述されるすべての特徴やその組み合わせは、必ずしも発明の本質的なものであるとは限らない。 Hereinafter, the present invention will be described based on preferred embodiments. The embodiments do not limit the invention but are exemplifications, and all features and combinations described in the embodiments are not necessarily essential to the invention.
本実施の形態に係る潤滑油組成物は、軸受に好適に用いることができ、特に流体軸受に好適に用いることができる。本実施の形態の潤滑油組成物は、下記式（１）で表されるエーテル結合含有エステル化合物（以下では適宜、このエーテル結合含有エステル化合物を「化合物１」と称する）を含有する潤滑油基油（Ａ）を含む。 The lubricating oil composition according to the present embodiment can be suitably used for a bearing, and can be particularly suitably used for a fluid bearing. The lubricating oil composition of the present embodiment includes a lubricating oil group containing an ether bond-containing ester compound represented by the following formula (1) (hereinafter, this ether bond-containing ester compound will be referred to as “Compound 1” as appropriate). Contains oil (A).
潤滑油基油（Ａ）は、アルコール（Ｒ１−ＯＨ）と、炭素主鎖に酸素原子を含む、すなわちエーテル結合を有するカルボン酸（Ｒ２−Ｏ−Ｘ−ＣＯＯＨ）とを出発物質とし、これらが脱水縮合してなる化合物１を主成分とするものである。 Lubricating oil base oil (A) starts from alcohol (R 1 —OH) and a carboxylic acid (R 2 —O—X—COOH) containing an oxygen atom in the carbon main chain, ie, having an ether bond, These are mainly composed of compound 1 formed by dehydration condensation.
化合物１の一方の出発物質であるアルコール（Ｒ１−ＯＨ）において、Ｒ１は、炭素数１〜２０、好ましくは８〜２０の直鎖状又は１つ以上の側鎖を有する分岐鎖状のアルキル基である。Ｒ１の炭素数を２０以下とすることで、潤滑油基油（Ａ）の製造コストの増大を抑制することができる。また、Ｒ１の炭素数を８以上とすることで、潤滑油基油（Ａ）及びこれを含む潤滑油組成物の蒸発量をより低減することができる。また、後述する化合物１の炭素数の範囲を満たす上で必要となるＸやＲ２の炭素数が増加して、潤滑油基油（Ａ）及び潤滑油組成物の粘度や製造コストが過大になることをより抑制することができる。 In the alcohol (R 1 —OH) which is one starting material of Compound 1, R 1 is a straight chain having 1 to 20 carbon atoms, preferably 8 to 20 carbon atoms, or a branched chain having one or more side chains. It is an alkyl group. By making the carbon number of R 1 20 or less, an increase in the manufacturing cost of the lubricating base oil (A) can be suppressed. Further, by setting the carbon number of R 1 to 8 or more, the evaporation amount of the lubricating base oil (A) and the lubricating oil composition containing the same can be further reduced. Further, the number of carbons of X and R 2 required for satisfying the range of the carbon number of compound 1 described later increases, and the viscosity and production cost of the lubricating base oil (A) and the lubricating oil composition are excessive. It can be suppressed more.
当該アルコールとしては、例えばメタノール、エタノール、ｎ−プロパノール、ｎ−ブタノール、ｎ−ペンタノール、ｎ−ヘキサノール、ｎ−ヘプタノール、ｎ−オクタノール、ｎ−ノナノール、ｎ−デカノール、ｎ−ウンデカノール、ｎ−ドデカノール、ｎ−トリデカノール、ｎ−テトラデカノール等の直鎖アルコールや、２−ヘキシルデシルアルコール等の分岐鎖アルコール等を挙げることができる。化合物１の出発物質としてのアルコールは、飽和アルコールが好ましく、また直鎖アルコールが好ましい。 Examples of the alcohol include methanol, ethanol, n-propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol, n-nonanol, n-decanol, n-undecanol, and n-dodecanol. And linear alcohols such as n-tridecanol and n-tetradecanol, and branched chain alcohols such as 2-hexyldecyl alcohol. The alcohol as the starting material of compound 1 is preferably a saturated alcohol and is preferably a linear alcohol.
化合物１の他方の出発物質であるエーテル含有カルボン酸（Ｒ２−Ｏ−Ｘ−ＣＯＯＨ）において、Ｘは、炭素数３〜９の直鎖状又は１つ以上の側鎖を有する分岐鎖状のアルキレン基である。Ｘの炭素数を３以上とすることで、潤滑油基油（Ａ）及び潤滑油組成物の蒸発量を抑制することができる。また、Ｘの炭素数を９以下とすることで、潤滑油基油（Ａ）及び潤滑油組成物の製造時間の冗長化を抑制することができる。Ｘとしては、エチル基、ｎ−プロピル基、ｎ−ブチル基、ｎ−ペンチル基、ｎ−ヘキシル基、ｎ−ヘプチル基及びｎ−オクチル基が好ましく、ｎ−ペンチル基がより好ましい。 In the ether-containing carboxylic acid (R 2 —O—X—COOH) that is the other starting material of Compound 1, X is a linear chain having 3 to 9 carbon atoms or a branched chain having one or more side chains. An alkylene group; By setting the carbon number of X to 3 or more, the evaporation amount of the lubricating base oil (A) and the lubricating oil composition can be suppressed. Moreover, redundancy of the manufacturing time of lubricating base oil (A) and a lubricating oil composition can be suppressed by making carbon number of X 9 or less. X is preferably an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group and an n-octyl group, and more preferably an n-pentyl group.
当該エーテル含有カルボン酸におけるＲ２は、炭素数１〜１２の直鎖状又は１つ以上の側鎖を有する分岐鎖状のアルキル基である。Ｒ２の炭素数を１２以下とすることで、潤滑油基油（Ａ）及び潤滑油組成物の粘度や製造コストが過大になることを抑制することができる。Ｒ２としては、メチル基、エチル基、ｎ−プロピル基、ｎ−ブチル基、ｎ−ペンチル基、ｎ−ヘキシル基、２−エチルヘキシル基が好ましい。 R 2 in the ether-containing carboxylic acid is a linear alkyl group having 1 to 12 carbon atoms or a branched alkyl group having one or more side chains. By setting the carbon number of R 2 to 12 or less, it is possible to prevent the viscosity and manufacturing cost of the lubricating base oil (A) and the lubricating oil composition from becoming excessive. R 2 is preferably a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group or a 2-ethylhexyl group.
化合物１の炭素数、すなわちＸ、Ｒ１及びＲ２の炭素数の合計は、２２〜３４であることが好ましい。化合物１の炭素数を２２以上とすることで、潤滑油基油（Ａ）及び潤滑油組成物の粘度が過小となることと蒸発量の増大とをより抑制することができる。また、化合物１の炭素数を３４以下とすることで、潤滑油基油（Ａ）及び潤滑油組成物の粘度が過大になることをより抑制することができる。化合物１中の側鎖の数は、１以下であることが好ましく、１がより好ましい。化合物１の分岐（側鎖）を１以下とすることで、潤滑油基油（Ａ）及び潤滑油組成物の粘度指数の低下をより抑制することができる。また、潤滑油基油（Ａ）及び潤滑油組成物の蒸発量の増大をより抑制することができる。また、化合物１の分岐（側鎖）を１とした場合には、流動点の上昇を抑制することができ、潤滑油基油（Ａ）が常温で固体になることをより確実に回避することができる。また、Ｘは、分岐が１以下であることが好ましく、分岐が０、すなわち直鎖であることがより好ましい。 The number of carbon atoms of compound 1, that is, the total number of carbon atoms of X, R 1 and R 2 is preferably 22 to 34. By setting the number of carbon atoms of Compound 1 to 22 or more, it is possible to further suppress the viscosities of the lubricating base oil (A) and the lubricating oil composition from becoming excessively small and the increase in the amount of evaporation. Moreover, it can suppress more that the viscosity of lubricating oil base oil (A) and a lubricating oil composition becomes excessive because the carbon number of the compound 1 shall be 34 or less. The number of side chains in Compound 1 is preferably 1 or less, and more preferably 1. By making the branch (side chain) of compound 1 1 or less, it is possible to further suppress a decrease in the viscosity index of the lubricating base oil (A) and the lubricating oil composition. Moreover, the increase in the evaporation amount of the lubricating base oil (A) and the lubricating oil composition can be further suppressed. Moreover, when the branch (side chain) of the compound 1 is 1, the rise of the pour point can be suppressed, and the lubricant base oil (A) can be more reliably avoided from becoming solid at room temperature. Can do. X preferably has 1 or less branches, more preferably 0, that is, a straight chain.
潤滑油基油（Ａ）には、１種類の化合物１が単独で用いられてもよいし、２種類以上の化合物１が組み合わせで用いられてもよい。また、潤滑油組成物には、１種類の潤滑油基油（Ａ）が単独で用いられてもよいし、２種類以上の潤滑油基油（Ａ）が組み合わせで用いられてもよい。潤滑油基油（Ａ）における化合物１の含有量は、潤滑油基油（Ａ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。潤滑油基油（Ａ）及び化合物１は、従来公知の方法により調製することができ、これは当業者であれば容易に理解できることである。 In the lubricating base oil (A), one type of compound 1 may be used alone, or two or more types of compound 1 may be used in combination. In the lubricating oil composition, one type of lubricating base oil (A) may be used alone, or two or more types of lubricating base oil (A) may be used in combination. Content of the compound 1 in lubricating base oil (A) is 90-100 mass% with respect to the total mass of lubricating base oil (A), Preferably it is 95-100 mass%. The lubricating base oil (A) and compound 1 can be prepared by a conventionally known method, which can be easily understood by those skilled in the art.
上述のように、本実施の形態に係る潤滑油基油（Ａ）は、エーテル結合含有エステル化合物１を含む。このように、モノアルコールと、エーテル結合を主鎖に有する脂肪酸とからなるモノエステルを用いることで、潤滑油基油（Ａ）、ひいてはこれを含む潤滑油組成物の所望の粘度を維持しながら、良好な粘度指数、流動点及び蒸発量を達成することができる。このため、潤滑油組成物の温度特性と寿命とを高い次元でバランスさせることができる。これは、エーテル結合の酸素原子同士の相互作用によって、潤滑油基油（Ａ）中の化合物１同士の結合が阻害され、潤滑油基油（Ａ）の流動点が低下するためであると考えられる。 As described above, the lubricating base oil (A) according to the present embodiment includes the ether bond-containing ester compound 1. As described above, by using a monoester composed of a monoalcohol and a fatty acid having an ether bond in the main chain, while maintaining the desired viscosity of the lubricating base oil (A), and thus the lubricating oil composition containing the same. Good viscosity index, pour point and evaporation can be achieved. For this reason, the temperature characteristic and lifetime of a lubricating oil composition can be balanced in a high dimension. This is considered to be because the interaction between the oxygen atoms of the ether bond inhibits the bonding between the compounds 1 in the lubricating base oil (A) and the pour point of the lubricating base oil (A) is lowered. It is done.
潤滑油組成物は、好ましくは４０℃における動粘度が７〜２０ｍｍ２／ｓであり、流動点が−２０℃以下であり、粘度指数が１４０以上である。また、潤滑油組成物は、温度１２０℃でＳＵＳ３０４製の容器内に１２０時間放置したときの質量減少量（蒸発量）が、４０℃における動粘度が９．０付近（例えば９．０〜９．４）の場合に、好ましくは０．８０質量％以下であり、４０℃における動粘度が８．５付近（例えば８．４〜８．７）の場合に、好ましくは４．００質量％以下であり、４０℃における動粘度が１２．０付近（例えば１１．８〜１２．４）の場合に、好ましくは０．４０質量％以下である。また、温度１２０℃でＳＵＳ３０４製の容器内に５００時間放置したときの質量減少量（蒸発量）が、４０℃における動粘度が９．０付近の場合に、好ましくは１．８０質量％以下であり、４０℃における動粘度が８．５付近の場合に、好ましくは１０．００質量％以下であり、４０℃における動粘度が１２．０付近の場合に、好ましくは０．９０質量％以下である。 The lubricating oil composition preferably has a kinematic viscosity at 40 ° C. of 7 to 20 mm 2 / s, a pour point of −20 ° C. or lower, and a viscosity index of 140 or higher. The lubricating oil composition has a mass loss (evaporation amount) when left in a SUS304 container at a temperature of 120 ° C. for 120 hours, and a kinematic viscosity at 40 ° C. of around 9.0 (for example, 9.0 to 9). .4), preferably 0.80% by mass or less, and when the kinematic viscosity at 40 ° C. is around 8.5 (eg, 8.4 to 8.7), preferably 4.00% by mass or less. When the kinematic viscosity at 40 ° C. is around 12.0 (for example, 11.8 to 12.4), it is preferably 0.40% by mass or less. Further, when the kinematic viscosity at 40 ° C. is about 9.0 when the mass decrease amount (evaporation amount) when left in a SUS304 container at a temperature of 120 ° C. for 500 hours is preferably 1.80% by mass or less. When the kinematic viscosity at 40 ° C. is about 8.5, it is preferably 10.00% by mass or less, and when the kinematic viscosity at 40 ° C. is about 12.0, preferably 0.90% by mass or less. is there.
本実施の形態に係る潤滑油組成物は、潤滑油基油（Ａ）に加えて、下記式（２）で表されるエーテル結合非含有エステル化合物（以下では適宜、このエーテル結合非含有エステル化合物を「化合物２」と称する）を含有する潤滑油基油（Ｂ）をさらに含んでもよい。 In addition to the lubricating base oil (A), the lubricating oil composition according to the present embodiment includes an ether bond-free ester compound represented by the following formula (2) (hereinafter referred to as an ether bond-free ester compound as appropriate). (Hereinafter referred to as “compound 2”) may further include a lubricating base oil (B).
潤滑油基油（Ｂ）は、アルコール（Ｒ３−ＯＨ）と、炭素主鎖に酸素原子を含まない、すなわちエーテル結合を有しないカルボン酸（Ｒ４−ＣＯＯＨ）とを出発物質とし、これらが脱水縮合してなる化合物２を主成分とするものである。アルコールにおけるＲ３は、化合物１におけるＲ１と同様に定義される。なお、化合物１のＲ１と化合物２のＲ３とは、同一でも異なってもよい。カルボン酸におけるＲ４は、炭素数５〜１９の直鎖状又は分岐鎖状のアルキル基である。エーテル結合を有しない化合物２を含有する潤滑油基油（Ｂ）を含む潤滑油組成物に、エーテル結合を有する化合物１を含む潤滑油基油（Ａ）を添加することで、所望の粘度を保持しながら、潤滑油組成物に良好な温度特性と寿命とを付与することができる。潤滑油基油（Ｂ）における化合物２の含有量は、潤滑油基油（Ｂ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。 Lubricating oil base oil (B) starts from alcohol (R 3 —OH) and a carboxylic acid (R 4 —COOH) that does not contain an oxygen atom in the carbon main chain, that is, has no ether bond. The main component is compound 2 obtained by dehydration condensation. R 3 in the alcohol is defined similarly to R 1 in the compound 1. R 1 of compound 1 and R 3 of compound 2 may be the same or different. R 4 in the carboxylic acid is a linear or branched alkyl group having 5 to 19 carbon atoms. By adding the lubricating base oil (A) containing the compound 1 having an ether bond to the lubricating oil composition containing the lubricating base oil (B) containing the compound 2 having no ether bond, the desired viscosity is obtained. While maintaining, good temperature characteristics and life can be imparted to the lubricating oil composition. Content of the compound 2 in lubricating base oil (B) is 90-100 mass% with respect to the total mass of lubricating base oil (B), Preferably it is 95-100 mass%.
潤滑油組成物は、下記潤滑油基油（Ｃ）〜（Ｇ）からなる群より選択される１種類以上の潤滑油基油をさらに含んでもよい。
アジピン酸、ピメリン酸、スベリン酸、アゼライン酸及びセバシン酸からなる群より選択される１種類以上のジカルボン酸と、炭素数６〜１２のアルコールとの二塩基酸エステルを含有する潤滑油基油（Ｃ）
炭素数８〜２０の飽和または不飽和カルボン酸と、炭素数６〜２０のアルコールとのモノエステルを含有する潤滑油基油（Ｄ）
炭素数３〜１０の飽和または不飽和カルボン酸と、トリメチロールプロパンとのトリエステルを含有する潤滑油基油（Ｅ）
炭素数３〜１０の飽和または不飽和カルボン酸と、ペンタエリスリトールとのテトラエステルを含有する潤滑油基油（Ｆ）
鉱物油又は合成炭化水素油を含有する潤滑油基油（Ｇ）
The lubricating oil composition may further contain one or more lubricating base oils selected from the group consisting of the following lubricating base oils (C) to (G).
Lubricating base oil containing a dibasic acid ester of at least one dicarboxylic acid selected from the group consisting of adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid and an alcohol having 6 to 12 carbon atoms ( C)
Lubricating base oil (D) containing a monoester of a saturated or unsaturated carboxylic acid having 8 to 20 carbon atoms and an alcohol having 6 to 20 carbon atoms
Lubricating base oil (E) containing a triester of a saturated or unsaturated carboxylic acid having 3 to 10 carbon atoms and trimethylolpropane
Lubricating base oil (F) containing tetraester of saturated or unsaturated carboxylic acid having 3 to 10 carbon atoms and pentaerythritol
Lubricating base oil (G) containing mineral oil or synthetic hydrocarbon oil
潤滑油基油（Ｃ）に含まれる二塩基酸エステル（ジエステル）の好ましい例としては、アジピン酸ジ（２−エチルヘキシル）、アジピン酸ジ（３，５，５−トリメチルヘキシル）、アジピン酸ジイソドデシル、スベリン酸ジ（２−エチルヘキシル）、アゼライン酸ジ（２−エチルヘキシル）、セバシン酸ジ（２−エチルヘキシル）等を挙げることができる。潤滑油基油（Ｃ）におけるジエステルの含有量は、潤滑油基油（Ｃ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。 Preferred examples of the dibasic acid ester (diester) contained in the lubricating base oil (C) include di (2-ethylhexyl) adipate, di (3,5,5-trimethylhexyl) adipate, diisododecyl adipate, Examples include di (2-ethylhexyl) suberate, di (2-ethylhexyl) azelate, and di (2-ethylhexyl) sebacate. The content of the diester in the lubricating base oil (C) is 90 to 100% by weight, preferably 95 to 100% by weight, based on the total weight of the lubricating base oil (C).
潤滑油基油（Ｄ）に含まれるモノエステルの好ましい例としては、２−エチルヘキサン酸ステアリル、２−エチルヘキサン酸パルミチル、２−エチルヘキサン酸ミリスチル、ステアリン酸２−エチルヘキシル、パルミチン酸２−エチルヘキシル、ミリスチン酸２−エチルヘキシル、オレイン酸２−エチルヘキシル等を挙げることができる。潤滑油基油（Ｄ）におけるモノエステルの含有量は、潤滑油基油（Ｄ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。 Preferred examples of monoesters contained in the lubricating base oil (D) include stearyl 2-ethylhexanoate, palmityl 2-ethylhexanoate, myristyl 2-ethylhexanoate, 2-ethylhexyl stearate, 2-ethylhexyl palmitate , 2-ethylhexyl myristate, 2-ethylhexyl oleate and the like. The monoester content in the lubricating base oil (D) is 90 to 100% by weight, preferably 95 to 100% by weight, based on the total weight of the lubricating base oil (D).
潤滑油基油（Ｅ）に含まれるトリエステルの好ましい例としては、ｎ−ペンタン酸、ｎ−ヘキサン酸、ｎ−ヘプタン酸、ｎ−オクタン酸、ｎ−ノナン酸及びｎ−デカン酸の１種類以上とトリメチロールプロパンとのトリエステル等を挙げることができる。潤滑油基油（Ｅ）におけるトリエステルの含有量は、潤滑油基油（Ｅ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。 Preferred examples of triesters contained in the lubricating base oil (E) include one of n-pentanoic acid, n-hexanoic acid, n-heptanoic acid, n-octanoic acid, n-nonanoic acid and n-decanoic acid. Triesters of the above and trimethylolpropane can be exemplified. The content of triester in the lubricating base oil (E) is 90 to 100% by weight, preferably 95 to 100% by weight, based on the total weight of the lubricating base oil (E).
潤滑油基油（Ｆ）に含まれるテトラエステルの好ましい例としては、ｎ−ペンタン酸、ｎ−ヘキサン酸、ｎ−ヘプタン酸、ｎ−オクタン酸、ｎ−ノナン酸及びｎ−デカン酸の１種類以上とペンタエリスリトールとのテトラエステル等を挙げることができる。潤滑油基油（Ｆ）におけるテトラエステルの含有量は、潤滑油基油（Ｆ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。 Preferred examples of tetraesters contained in the lubricating base oil (F) include one of n-pentanoic acid, n-hexanoic acid, n-heptanoic acid, n-octanoic acid, n-nonanoic acid and n-decanoic acid. The tetraester of the above and pentaerythritol etc. can be mentioned. The content of the tetraester in the lubricating base oil (F) is 90 to 100% by mass, preferably 95 to 100% by mass, based on the total mass of the lubricating base oil (F).
潤滑油基油（Ｇ）に含まれる鉱物油及び合成炭化水素油としては、従来公知のものを用いることができる。潤滑油基油（Ｇ）における鉱物油及び合成炭化水素油の合計の含有量は、潤滑油基油（Ｇ）の全質量に対して９０〜１００質量％であり、好ましくは９５〜１００質量％である。潤滑油基油（Ｇ）は、鉱物油及び合成炭化水素油の一方のみを含んでもよい。 A conventionally well-known thing can be used as a mineral oil and a synthetic hydrocarbon oil contained in lubricating base oil (G). The total content of mineral oil and synthetic hydrocarbon oil in the lubricating base oil (G) is 90 to 100% by mass, preferably 95 to 100% by mass, based on the total mass of the lubricating base oil (G). It is. The lubricating base oil (G) may contain only one of mineral oil and synthetic hydrocarbon oil.
潤滑油組成物における潤滑油基油（Ａ）の含有量は、潤滑油組成物の全質量に対して１０質量％以上１００質量％以下であることが好ましい。潤滑油基油（Ａ）の含有量を１０質量％以上とすることで、潤滑油基油（Ａ）による良好な温度特性と寿命を付与する効果をより確実に発揮させることができる。潤滑油組成物中の潤滑油基油（Ｂ）〜（Ｇ）の含有量は、潤滑油基油（Ａ）の含有量が上述した範囲を満たすことを条件に、任意の値に設定することができる。 The content of the lubricating base oil (A) in the lubricating oil composition is preferably 10% by mass or more and 100% by mass or less with respect to the total mass of the lubricating oil composition. By setting the content of the lubricating base oil (A) to 10% by mass or more, the lubricating base oil (A) can exhibit the effect of imparting good temperature characteristics and life. The content of the lubricating base oil (B) to (G) in the lubricating oil composition should be set to an arbitrary value on condition that the content of the lubricating base oil (A) satisfies the above-described range. Can do.
潤滑油組成物は、ヒンダードフェノール系酸化防止剤及びヒンダードアミン系酸化防止剤の少なくとも一方をさらに含んでもよい。これにより、潤滑油組成物の酸化を防止して、潤滑油組成物の長寿命化を図ることができる。これらの酸化防止剤の含有量は、潤滑油組成物の全質量に対して０．１質量％以上、１０．０質量％以下であることが好ましい。 The lubricating oil composition may further include at least one of a hindered phenol-based antioxidant and a hindered amine-based antioxidant. Thereby, the oxidation of the lubricating oil composition can be prevented and the life of the lubricating oil composition can be extended. The content of these antioxidants is preferably 0.1% by mass or more and 10.0% by mass or less with respect to the total mass of the lubricating oil composition.
ヒンダードフェノール系酸化防止剤としては、例えば２，６−ジ−ｔｅｒｔ−ブチル−４−ヒドロキシトルエン、ｎ−オクタデシル−３−（３’，５’−ジ−ｔｅｒｔ−ブチル−４’−ヒドロキシフェニル）プロピオネート等のモノフェノール系、４，４’−ブチリデンビス（３−メチル−６−ｔｅｒｔ−ブチルフェノール）、４，４’−メチレンビス（４−メチル−６−ｔｅｒｔ−ブチルフェノール）等のジフェノール系、または、２，６−ジ−ｔｅｒｔ−ブチル−４−ヒドロキシ構造を３つ以上有するフェノール系の酸化防止剤等が挙げられる。これらのフェノール系酸化防止剤は、単独で用いられてもよく、２種類以上の組み合わせで用いられてもよい。 Examples of hindered phenol antioxidants include 2,6-di-tert-butyl-4-hydroxytoluene and n-octadecyl-3- (3 ′, 5′-di-tert-butyl-4′-hydroxyphenyl). ) Monophenols such as propionate, diphenols such as 4,4′-butylidenebis (3-methyl-6-tert-butylphenol), 4,4′-methylenebis (4-methyl-6-tert-butylphenol), or And phenolic antioxidants having three or more 2,6-di-tert-butyl-4-hydroxy structures. These phenolic antioxidants may be used alone or in combination of two or more.
ヒンダードアミン系酸化防止剤としては、例えばジアルキル化ジフェニルアミン、ジオクチルジフェニルアミン、または、４，４’−ビス（α，α−ジメチルベンジル）ジフェニルアミン等が挙げられる。これらのアミン系酸化防止剤は単独で用いられてもよく、２種類以上の組み合わせで用いられてもよい。 Examples of the hindered amine antioxidant include dialkylated diphenylamine, dioctyl diphenylamine, and 4,4′-bis (α, α-dimethylbenzyl) diphenylamine. These amine-based antioxidants may be used alone or in combination of two or more.
以上説明したように、本実施の形態に係る潤滑油基油（Ａ）は、上記式（１）で表されるエーテル結合含有エステル化合物１を含む。また、本実施の形態に係る潤滑油組成物は、この潤滑油基油（Ａ）を含む。このため、潤滑油基油（Ａ）及び潤滑油組成物の所望の粘度を維持しながら、良好な温度特性と寿命とを実現することができる。また、このような高性能の潤滑油組成物を流体軸受等の軸受に用いることで、回転体と軸受との間の抵抗をより長期間、またより低温の環境下において小さくすることができ、さらには抵抗の小さい状態を外部環境の温度変化に対して安定的に維持することができる。よって、本実施の形態の潤滑油組成物を用いた軸受を搭載した電子機器の低消費電力化を図ることができる。 As described above, the lubricating base oil (A) according to the present embodiment includes the ether bond-containing ester compound 1 represented by the above formula (1). Moreover, the lubricating oil composition according to the present embodiment includes this lubricating base oil (A). For this reason, it is possible to realize good temperature characteristics and life while maintaining the desired viscosity of the lubricating base oil (A) and the lubricating oil composition. Further, by using such a high-performance lubricating oil composition for a bearing such as a fluid bearing, the resistance between the rotating body and the bearing can be reduced for a longer period of time or in a lower temperature environment, Furthermore, a state with a small resistance can be stably maintained against a temperature change in the external environment. Therefore, it is possible to reduce the power consumption of an electronic device equipped with a bearing using the lubricating oil composition of the present embodiment.
また、本実施の形態の潤滑油基油（Ａ）に含まれる化合物１は、アルコール（Ｒ１−ＯＨ）と、主鎖にエーテル結合を有するカルボン酸（Ｒ２−Ｏ−Ｘ−ＣＯＯＨ）とから合成される化合物である。化合物１の一方の出発物質であるエーテル含有カルボン酸は、アルコール（Ｒ２−ＯＨ）とヒドロキシ酸（ＨＯ−Ｘ−ＣＯＯＨ）との脱水縮合により合成することができる。ヒドロキシ酸（ＨＯ−Ｘ−ＣＯＯＨ）は２つの異なる官能基、すなわちヒドロキシ基とカルボキシ基とを有する。このため、２つの官能基がともにヒドロキシ基である場合に比べて、アルコール（Ｒ２−ＯＨ）とヒドロキシ酸（ＨＯ−Ｘ−ＣＯＯＨ）とを一対一で結合させやすい。したがって、化合物１を簡単に合成することができる。その結果、潤滑油基油（Ａ）及び潤滑油組成物の製造工程の簡略化や製造コストの低減が可能である。 Further, the compound 1 contained in the lubricating base oil (A) of the present embodiment includes an alcohol (R 1 —OH), a carboxylic acid having an ether bond in the main chain (R 2 —O—X—COOH), and It is a compound synthesized from The ether-containing carboxylic acid that is one starting material of Compound 1 can be synthesized by dehydration condensation of an alcohol (R 2 —OH) and a hydroxy acid (HO—X—COOH). Hydroxy acid (HO-X-COOH) has two different functional groups, a hydroxy group and a carboxy group. Therefore, as compared with the case the two functional groups are both hydroxy groups, likely by binding with an alcohol (R 2 -OH) and hydroxy acid (HO-X-COOH) in one-to-one. Therefore, compound 1 can be easily synthesized. As a result, the manufacturing process of the lubricating base oil (A) and the lubricating oil composition can be simplified and the manufacturing cost can be reduced.
本発明は、上述の実施の形態に限定されるものではなく、当業者の知識に基づいて各種の設計変更などの変形を加えることも可能であり、そのような変形が加えられた実施の形態も本発明の範囲に含まれるものである。 The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art, and the embodiments to which such modifications are added. Are also included in the scope of the present invention.
以下、本発明の実施例を説明するが、これら実施例は、本発明を好適に説明するための例示に過ぎず、なんら本発明を限定するものではない。 Examples of the present invention will be described below. However, these examples are merely examples for suitably explaining the present invention, and do not limit the present invention.
（実施例１、参考例２及び比較例１，２）
実施例１、参考例２及び比較例１，２に係る潤滑油組成物を用意した。潤滑油組成物は、従来公知の方法により調製することができる。各潤滑油組成物の組成は、下記表１に示すとおりである。実施例１、参考例２は、基油として上述したエーテル結合含有エステル化合物（化合物１）を含む潤滑油組成物である。比較例１，２は、基油として上述したエーテル結合非含有エステル化合物（化合物２）を含む潤滑油組成物である。また、実施例１、参考例２及び比較例１，２の各潤滑油組成物は、４０℃における動粘度が９．０付近に調整された潤滑油である。
(Example 1 , Reference Example 2 and Comparative Examples 1 and 2)
Lubricating oil compositions according to Example 1 , Reference Example 2 and Comparative Examples 1 and 2 were prepared. The lubricating oil composition can be prepared by a conventionally known method. The composition of each lubricating oil composition is as shown in Table 1 below. Example 1 and Reference Example 2 are lubricating oil compositions containing the ether bond-containing ester compound (Compound 1) described above as the base oil. Comparative Examples 1 and 2 are lubricating oil compositions containing the above-mentioned ether bond-free ester compound (Compound 2) as the base oil. Moreover, each lubricating oil composition of Example 1 , Reference Example 2, and Comparative Examples 1 and 2 is a lubricating oil whose kinematic viscosity at 40 ° C. is adjusted to around 9.0.
なお、各実施例、参考例及び比較例の潤滑油組成物には、潤滑油組成物の全質量を１００質量％としたときに、酸化防止剤（ＩＲＧＡＮＯＸ Ｌ５７：ＢＡＳＦ社製）を１．０質量％、極圧剤（一般的な極圧剤であるＴＣＰ（トリクレジルホスフェート））を０．５質量％、金属不活性化剤（ＩＲＧＡＭＥＴ ３９：ＢＡＳＦ社））を０．１質量％、防錆剤を０．０５質量％、それぞれ添加剤として使用した。また、潤滑油組成物１００質量％から添加剤の質量％を差し引いた残部の量を、全て基油の含有量とした。 Incidentally, each embodiment, the lubricating oil composition of Example及Beauty ratio Comparative Examples, the total weight of the lubricating oil composition is 100 wt%, antioxidant: the (IRGANOX L57 from BASF) 1 0.0% by mass, 0.5% by mass of extreme pressure agent (TCP (tricresyl phosphate), which is a general extreme pressure agent), 0.1% by mass of metal deactivator (IRGAMET 39: BASF) % And rust inhibitor 0.05% by mass, respectively, were used as additives. Further, the remaining amount obtained by subtracting the mass% of the additive from 100 mass% of the lubricating oil composition was regarded as the base oil content.
（動粘度測定及び粘度指数算出）
各実施例、参考例及び比較例の潤滑油組成物について、０℃、４０℃、１００℃における動粘度（ｍｍ２／ｓ）を測定した。動粘度は、ＪＩＳ Ｋ ２２８３に準じて、キャノン−フェンスケ粘度計を用いて測定した。また、ＪＩＳ Ｋ ２２８３に準じて、４０℃及び１００℃の動粘度から粘度指数を算出した。結果を表１に示す。
(Kinematic viscosity measurement and viscosity index calculation)
Each embodiment will lubricating oil composition of Example及Beauty ratio Comparative Examples, 0 ° C., 40 ° C., was measured kinematic viscosity (mm 2 / s) at 100 ° C.. The kinematic viscosity was measured using a Canon-Fenske viscometer according to JIS K 2283. Further, the viscosity index was calculated from the kinematic viscosities at 40 ° C. and 100 ° C. according to JIS K 2283. The results are shown in Table 1.
（蒸発量測定）
各実施例、参考例及び比較例の潤滑油組成物について、１２０時間及び５００時間経過時の蒸発量（質量％）を測定した。ＳＵＳ３０４製の容器に各潤滑油組成物を入れて温度１２０℃で放置し、１２０時間及び５００時間経過時の質量減少量を蒸発量とした。結果を表１に示す。
(Evaporation measurement)
Each embodiment will lubricating oil composition of Example及Beauty ratio Comparative Examples was measured 120 hours and the amount of evaporation at 500 hours elapsed (mass%). Each lubricating oil composition was placed in a container made of SUS304 and allowed to stand at a temperature of 120 ° C., and the amount of mass loss after 120 hours and 500 hours had elapsed was defined as the amount of evaporation. The results are shown in Table 1.
（摩擦係数測定）
各実施例、参考例及び比較例の潤滑油組成物について、曽田式振子型試験機により摩擦係数を測定した。この試験は、振子支点の摩擦部分に各潤滑油組成物を与え、振子を振動させ、振動の減衰から摩擦係数を求めるものである。摩擦係数の測定は室温で行った。結果を表１に示す。
(Friction coefficient measurement)
Each embodiment will lubricating oil composition of Example及Beauty ratio Comparative Examples, the friction coefficient was measured by Soda pendulum type testing machine. In this test, each lubricating oil composition is applied to the friction part of the pendulum fulcrum, the pendulum is vibrated, and the friction coefficient is obtained from the vibration attenuation. The coefficient of friction was measured at room temperature. The results are shown in Table 1.
（流動点測定）
各実施例、参考例及び比較例の潤滑油組成物について、ＪＩＳ Ｋ２２６９に準じて流動点を測定した。結果を表１に示す。
(Pour point measurement)
Each embodiment will lubricating oil composition of Example及Beauty ratio Comparative Examples were measured pour point in accordance with JIS K2269. The results are shown in Table 1.
表１に示すように、比較例１の潤滑油組成物は、流動点は−２０℃以下で良好であったが、粘度指数が１４０を下回り、１２０時間及び５００時間の蒸発量がそれぞれ０．８０質量％、１．８０質量％を超え、不良であった。また、比較例２の潤滑油組成物は、流動点は−２０℃以下、粘度指数は１４０以上でそれぞれ良好であったが、１２０時間及び５００時間の蒸発量がそれぞれ０．８０質量％、１．８０質量％を超え、不良であった。これに対し、実施例１、参考例２の潤滑油組成物は、流動点は−２０℃以下、粘度指数は１４０以上、１２０時間及び５００時間の蒸発量はそれぞれ０．８０質量％以下、１．８０質量％以下であり、流動点、粘度指数及び蒸発量の全てにおいて良好であった。特に、実施例１の潤滑油組成物は、比較例１，２の潤滑油組成物に比べて、顕著に低い流動点を示した。 As shown in Table 1, the lubricating oil composition of Comparative Example 1 was good at a pour point of −20 ° C. or lower, but the viscosity index was less than 140, and the evaporation amount at 120 hours and 500 hours was 0.00 respectively. It exceeded 80 mass% and 1.80 mass%, and was inferior. Further, the lubricating oil composition of Comparative Example 2 was good at a pour point of −20 ° C. or less and a viscosity index of 140 or more, but the evaporation amount at 120 hours and 500 hours was 0.80% by mass, 1 More than 80 mass%, it was inferior. In contrast, the lubricating oil compositions of Example 1 and Reference Example 2 have a pour point of −20 ° C. or less, a viscosity index of 140 or more, and an evaporation amount of 120 hours and 500 hours, respectively, of 0.80% by mass or less, It was not more than 80% by mass and was good in all of the pour point, viscosity index and evaporation. In particular, the lubricating oil composition of Example 1 exhibited a significantly lower pour point than the lubricating oil compositions of Comparative Examples 1 and 2.
したがって、実施例１、参考例２の潤滑油組成物は、その粘度指数と流動点とから、良好な温度特性を有し温度変化に対して安定でより広い温度範囲で使用できることが確認された。また、その蒸発量から、耐熱性に優れより長寿命であることが確認された。さらに、実施例１、参考例２の潤滑油組成物では、比較例１，２の潤滑油組成物に比べて摩擦係数が向上した。よって、実施例１、参考例２の潤滑油組成物は、優れた潤滑性を備えることが確認された。以上より、実施例１、参考例２の潤滑油組成物が、低温における流動性能に優れ、温度変化に対する安定性を有し、小型モータ等に搭載される軸受用の潤滑油に要求される低粘度、耐熱性、潤滑性等の性能を具備することが示された。 Therefore, it was confirmed from the viscosity index and pour point that the lubricating oil compositions of Example 1 and Reference Example 2 have good temperature characteristics and are stable against temperature changes and can be used in a wider temperature range. . Moreover, it was confirmed from the evaporation amount that it has excellent heat resistance and a longer life. Further, in the lubricating oil compositions of Example 1 and Reference Example 2, the friction coefficient was improved as compared with the lubricating oil compositions of Comparative Examples 1 and 2. Therefore, it was confirmed that the lubricating oil compositions of Example 1 and Reference Example 2 have excellent lubricity. From the above, the lubricating oil compositions of Example 1 and Reference Example 2 have excellent flow performance at low temperatures, have stability against temperature changes, and are required for bearing lubricating oils mounted on small motors and the like. It was shown to have performance such as viscosity, heat resistance and lubricity.
（参考例３及び比較例３）
参考例３及び比較例３に係る潤滑油組成物を用意した。各潤滑油組成物の組成は、下記表２に示すとおりである。参考例３は、基油として化合物１を含む潤滑油組成物である。比較例３は、基油として化合物２を含む潤滑油組成物である。また、参考例３及び比較例３の各潤滑油組成物は、４０℃における動粘度が８．５付近に調整された潤滑油である。また、実施例１、参考例２及び比較例１，２と同じ方法で、参考例３及び比較例３の潤滑油組成物における動粘度、粘度指数、蒸発量、摩擦係数及び流動点を測定した。結果を表２に示す。
( Reference Example 3 and Comparative Example 3)
Lubricating oil compositions according to Reference Example 3 and Comparative Example 3 were prepared. The composition of each lubricating oil composition is as shown in Table 2 below. Reference Example 3 is a lubricating oil composition containing Compound 1 as a base oil. Comparative Example 3 is a lubricating oil composition containing Compound 2 as the base oil. Moreover, each lubricating oil composition of Reference Example 3 and Comparative Example 3 is a lubricating oil whose kinematic viscosity at 40 ° C. is adjusted to around 8.5. Further, the kinematic viscosity, viscosity index, evaporation amount, friction coefficient and pour point in the lubricating oil compositions of Reference Example 3 and Comparative Example 3 were measured in the same manner as in Example 1 , Reference Example 2 and Comparative Examples 1 and 2. . The results are shown in Table 2.
表２に示すように、比較例３の潤滑油組成物は、粘度指数が１４０以上で良好であったが、流動点が−２０℃を超え、１２０時間及び５００時間の蒸発量がそれぞれ４．００質量％、１０．００質量％を超え、不良であった。これに対し、参考例３の潤滑油組成物は、流動点は−２０℃以下、粘度指数は１４０以上、１２０時間及び５００時間の蒸発量はそれぞれ４．００質量％以下、１０．００質量％以下であり、流動点、粘度指数及び蒸発量の全てにおいて良好であった。 As shown in Table 2, the lubricating oil composition of Comparative Example 3 was good with a viscosity index of 140 or more, but the pour point exceeded −20 ° C., and the evaporation amount for 120 hours and 500 hours was 4. It exceeded 00 mass% and 10.00 mass%, and was inferior. On the other hand, the lubricating oil composition of Reference Example 3 has a pour point of −20 ° C. or less, a viscosity index of 140 or more, and an evaporation amount of 120 hours and 500 hours of 4.00 mass% or less, 10.00 mass%, respectively. It was as follows, and all of the pour point, the viscosity index, and the evaporation amount were good.
したがって、参考例３の潤滑油組成物は、その粘度指数と流動点とから、良好な温度特性を有し温度変化に対して安定でより広い温度範囲で使用できることが確認された。また、その蒸発量から、耐熱性に優れより長寿命であることが確認された。さらに、参考例３の潤滑油組成物では、比較例３の潤滑油組成物に比べて摩擦係数が向上した。よって、参考例３の潤滑油組成物は、優れた潤滑性を備えることが確認された。以上より、参考例３の潤滑油組成物が、低温における流動性能に優れ、温度変化に対する安定性を有し、小型モータ等に搭載される軸受用の潤滑油に要求される低粘度、耐熱性、潤滑性等の性能を具備することが示された。 Therefore, it was confirmed from the viscosity index and pour point that the lubricating oil composition of Reference Example 3 had good temperature characteristics and was stable against temperature changes and could be used in a wider temperature range. Moreover, it was confirmed from the evaporation amount that it has excellent heat resistance and a longer life. Furthermore, in the lubricating oil composition of Reference Example 3, the friction coefficient was improved as compared with the lubricating oil composition of Comparative Example 3. Therefore, it was confirmed that the lubricating oil composition of Reference Example 3 had excellent lubricity. From the above, the lubricating oil composition of Reference Example 3 has excellent flow performance at low temperatures, has stability against temperature changes, and has low viscosity and heat resistance required for bearing lubricating oils mounted on small motors and the like. It was shown to have performance such as lubricity.
（参考例４及び比較例４）
参考例４及び比較例４に係る潤滑油組成物を用意した。各潤滑油組成物の組成は、下記表３に示すとおりである。参考例４は、基油として化合物１を含む潤滑油組成物である。比較例４は、基油としてセバシン酸ジ（２−エチルヘキシル）（ＤＯＳ）を含む潤滑油組成物である。また、参考例４及び比較例４の各潤滑油組成物は、４０℃における動粘度が１２．０付近に調整された潤滑油である。また、実施例１、参考例２及び比較例１，２と同じ方法で、参考例４及び比較例４の潤滑油組成物における動粘度、粘度指数、蒸発量、摩擦係数及び流動点を測定した。結果を表３に示す。
( Reference Example 4 and Comparative Example 4)
Lubricating oil compositions according to Reference Example 4 and Comparative Example 4 were prepared. The composition of each lubricating oil composition is as shown in Table 3 below. Reference Example 4 is a lubricating oil composition containing Compound 1 as a base oil. Comparative Example 4 is a lubricating oil composition containing di (2-ethylhexyl) sebacate (DOS) as the base oil. Moreover, each lubricating oil composition of Reference Example 4 and Comparative Example 4 is a lubricating oil whose kinematic viscosity at 40 ° C. is adjusted to around 12.0. Further, the kinematic viscosity, viscosity index, evaporation amount, friction coefficient and pour point in the lubricating oil compositions of Reference Example 4 and Comparative Example 4 were measured in the same manner as in Example 1 , Reference Example 2 and Comparative Examples 1 and 2. . The results are shown in Table 3.
表３に示すように、比較例４の潤滑油組成物は、流動点が−２０℃以下、粘度指数が１４０以上でそれぞれ良好であったが、１２０時間及び５００時間の蒸発量がそれぞれ０．４０質量％、０．９０質量％を超え、不良であった。これに対し、参考例４の潤滑油組成物は、流動点は−２０℃以下、粘度指数は１４０以上、１２０時間及び５００時間の蒸発量はそれぞれ０．４０質量％以下、０．９０質量％以下であり、流動点、粘度指数及び蒸発量の全てにおいて良好であった。 As shown in Table 3, the lubricating oil composition of Comparative Example 4 was good at a pour point of −20 ° C. or lower and a viscosity index of 140 or higher, but the evaporation amount at 120 hours and 500 hours was 0.00 respectively. It exceeded 40 mass% and 0.90 mass%, and was inferior. On the other hand, the lubricating oil composition of Reference Example 4 has a pour point of −20 ° C. or less, a viscosity index of 140 or more, and an evaporation amount of 120 hours and 500 hours, respectively, of 0.40 mass% or less and 0.90 mass% It was as follows, and all of the pour point, the viscosity index, and the evaporation amount were good.
したがって、参考例４の潤滑油組成物は、その粘度指数と流動点とから、良好な温度特性を有し温度変化に対して安定でより広い温度範囲で使用できることが確認された。また、その蒸発量から、耐熱性に優れより長寿命であることが確認された。さらに、参考例４の潤滑油組成物では、比較例４の潤滑油組成物に比べて摩擦係数が向上した。よって、参考例４の潤滑油組成物は、優れた潤滑性を備えることが確認された。以上より、参考例４の潤滑油組成物が、低温における流動性能に優れ、温度変化に対する安定性を有し、小型モータ等に搭載される軸受用の潤滑油に要求される低粘度、耐熱性、潤滑性等の性能を具備することが示された。 Therefore, it was confirmed from the viscosity index and pour point that the lubricating oil composition of Reference Example 4 had good temperature characteristics and was stable against temperature changes and could be used in a wider temperature range. Moreover, it was confirmed from the evaporation amount that it has excellent heat resistance and a longer life. Furthermore, in the lubricating oil composition of Reference Example 4, the friction coefficient was improved as compared with the lubricating oil composition of Comparative Example 4. Therefore, it was confirmed that the lubricating oil composition of Reference Example 4 had excellent lubricity. From the above, the lubricating oil composition of Reference Example 4 has excellent flow performance at low temperatures, has stability against temperature changes, and has low viscosity and heat resistance required for bearing lubricating oils mounted on small motors and the like. It was shown to have performance such as lubricity.
（参考例５）
参考例５に係る潤滑油組成物を用意した。潤滑油組成物の組成は、下記表４に示すとおりである。参考例５は、基油として化合物１を含む潤滑油組成物である。また、参考例５の潤滑油組成物は、Ｒ１がｎ−テトラデシル基、Ｘがｎ−ペンチレン基、Ｒ２が２−エチルヘキシル基である第１の化合物１と、Ｒ１がｎ−ドデシル基、Ｘがｎ−ペンチレン基、Ｒ２が２−エチルヘキシル基である第２の化合物１とを、３：７の質量比で混合して調製された組成物である。実施例１、参考例２及び比較例１，２と同じ方法で、参考例５の潤滑油組成物における動粘度、粘度指数、蒸発量、摩擦係数及び流動点を測定した。結果を表４に示す。
( Reference Example 5)
A lubricating oil composition according to Reference Example 5 was prepared. The composition of the lubricating oil composition is as shown in Table 4 below. Reference Example 5 is a lubricating oil composition containing Compound 1 as a base oil. In addition, the lubricating oil composition of Reference Example 5 has a first compound 1 in which R 1 is an n-tetradecyl group, X is an n-pentylene group, and R 2 is a 2-ethylhexyl group, and R 1 is an n-dodecyl group. , X is an n-pentylene group, and R 2 is a 2-ethylhexyl group. The second compound 1 is a composition prepared by mixing at a mass ratio of 3: 7. The kinematic viscosity, viscosity index, evaporation amount, friction coefficient and pour point of the lubricating oil composition of Reference Example 5 were measured in the same manner as in Example 1 , Reference Example 2 and Comparative Examples 1 and 2. The results are shown in Table 4.
表４に示すように、参考例５の潤滑油組成物は、４０℃における動粘度が１０．８０ｍｍ２／ｓで、流動点は−２０℃以下、粘度指数は１４０以上、１２０時間及び５００時間の蒸発量はそれぞれ０．５４質量％、０．９１質量％と低い値であり、流動点、粘度指数及び蒸発量の全てにおいて良好であった。したがって、参考例５の潤滑油組成物は、その粘度指数と流動点とから、良好な温度特性を有し温度変化に対して安定でより広い温度範囲で使用できることが確認された。また、その蒸発量から、耐熱性に優れより長寿命であることが確認された。以上より、参考例５の潤滑油組成物が、低温における流動性能に優れ、温度変化に対する安定性を有し、小型モータ等に搭載される軸受用の潤滑油に要求される低粘度、耐熱性、潤滑性等の性能を具備することが示された。 As shown in Table 4, the lubricating oil composition of Reference Example 5 had a kinematic viscosity at 40 ° C. of 10.80 mm 2 / s, a pour point of −20 ° C. or less, a viscosity index of 140 or more, 120 hours and 500 hours. The evaporation amount of was low values of 0.54% by mass and 0.91% by mass, respectively, and was good in all of the pour point, viscosity index and evaporation amount. Therefore, it was confirmed from the viscosity index and pour point that the lubricating oil composition of Reference Example 5 had good temperature characteristics and was stable against temperature changes and could be used in a wider temperature range. Moreover, it was confirmed from the evaporation amount that it has excellent heat resistance and a longer life. From the above, the lubricating oil composition of Reference Example 5 has excellent flow performance at low temperatures, has stability against temperature changes, and has low viscosity and heat resistance required for bearing lubricating oils mounted on small motors and the like. It was shown to have performance such as lubricity.
Claims (7)
アジピン酸、ピメリン酸、スベリン酸、アゼライン酸及びセバシン酸からなる群より選択される１種類以上のジカルボン酸と、炭素数６〜１２のアルコールとの二塩基酸エステルを含有する潤滑油基油（Ｃ）
炭素数８〜２０の飽和又は不飽和カルボン酸と、炭素数６〜２０のアルコールとのモノエステルを含有する潤滑油基油（Ｄ）
炭素数３〜１０の飽和又は不飽和カルボン酸と、トリメチロールプロパンとのトリエステルを含有する潤滑油基油（Ｅ）
炭素数３〜１０の飽和又は不飽和カルボン酸と、ペンタエリスリトールとのテトラエステルを含有する潤滑油基油（Ｆ）
鉱物油又は合成炭化水素油を含有する潤滑油基油（Ｇ） The lubricating oil composition according to claim 3 or 4, further comprising one or more lubricating base oils selected from the group consisting of the following lubricating base oils (C) to (G).
Lubricating base oil containing a dibasic acid ester of at least one dicarboxylic acid selected from the group consisting of adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid and an alcohol having 6 to 12 carbon atoms ( C)
Lubricating oil base oil (D) containing a monoester of a saturated or unsaturated carboxylic acid having 8 to 20 carbon atoms and an alcohol having 6 to 20 carbon atoms
Lubricating base oil (E) containing a triester of a saturated or unsaturated carboxylic acid having 3 to 10 carbon atoms and trimethylolpropane
Lubricating base oil (F) containing tetraester of saturated or unsaturated carboxylic acid having 3 to 10 carbon atoms and pentaerythritol
Lubricating base oil (G) containing mineral oil or synthetic hydrocarbon oil
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014205908A JP6130818B2 (en) | 2014-10-06 | 2014-10-06 | Lubricating base oil and lubricating oil composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014205908A JP6130818B2 (en) | 2014-10-06 | 2014-10-06 | Lubricating base oil and lubricating oil composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016074816A JP2016074816A (en) | 2016-05-12 |
| JP6130818B2 true JP6130818B2 (en) | 2017-05-17 |
Family
ID=55950861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014205908A Active JP6130818B2 (en) | 2014-10-06 | 2014-10-06 | Lubricating base oil and lubricating oil composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6130818B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018062632A (en) * | 2016-10-14 | 2018-04-19 | 国立大学法人広島大学 | Base oil for lubricant and lubricant |
| JP6888500B2 (en) * | 2017-09-22 | 2021-06-16 | 日本電産株式会社 | Lubricating oil for fluid dynamic bearings, fluid dynamic bearings and spindle motors |
| JP6965096B2 (en) * | 2017-10-19 | 2021-11-10 | コスモ石油ルブリカンツ株式会社 | Conductive Lubricating Oil Composition and Spindle Motor |
| CN113195446B (en) * | 2018-12-20 | 2024-05-31 | 新日本理化株式会社 | Lubricating oil base oil for hydrodynamic bearing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3961618B2 (en) * | 1997-05-27 | 2007-08-22 | 出光興産株式会社 | Lubricating base oil |
| JP4951828B2 (en) * | 2000-08-31 | 2012-06-13 | 新日本理化株式会社 | Bearing lubricant |
| JP5292773B2 (en) * | 2006-12-27 | 2013-09-18 | 新日本理化株式会社 | Bearing lubricant |
| JP5663765B2 (en) * | 2010-09-08 | 2015-02-04 | 株式会社Moresco | Dibasic acid ester compound and lubricating base oil composition containing the compound |
| JP5760218B2 (en) * | 2010-11-17 | 2015-08-05 | 国立大学法人広島大学 | Compound having branched oxaalkyl chain and use thereof |
| JP5959382B2 (en) * | 2011-09-30 | 2016-08-02 | 株式会社バルビス | Lubricant composition for bearings |
| CN105579431B (en) * | 2013-09-20 | 2018-05-04 | 株式会社Moresco | Monoester compound and its utilization containing ether |
-
2014
- 2014-10-06 JP JP2014205908A patent/JP6130818B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016074816A (en) | 2016-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5959382B2 (en) | Lubricant composition for bearings | |
| JP5334425B2 (en) | Bearing oil composition | |
| JP6384649B2 (en) | Lubricating base oil | |
| US7517838B2 (en) | Lubricating oil for bearing | |
| JP5640315B2 (en) | Lubricating oil composition for hydrodynamic bearings or sintered oil-impregnated bearings | |
| JP6130818B2 (en) | Lubricating base oil and lubricating oil composition | |
| JP6186056B2 (en) | Ether-containing monoester compounds and use thereof | |
| JP2012067213A (en) | Bearing lubricating oil | |
| JP6195429B2 (en) | Working fluid composition for refrigerator and refrigerator oil | |
| JP2008069234A (en) | Lubricating oil composition, lubricating oil for fluid bearing, and fluid bearing and method for lubricating the fluid bearing by using the same | |
| EP2821464A1 (en) | Working fluid composition for refrigerator, refrigeration oil, and method for producing same | |
| KR101819132B1 (en) | Lubricant composition, use thereof and aliphatic ether compound | |
| JP2012102235A (en) | Lubricating base oil | |
| JP2017031269A (en) | Lubricant base oil for fluid bearing | |
| JP4891014B2 (en) | Bearing oil composition | |
| JP2007145899A (en) | Bearing oil composition | |
| JPWO2011125842A1 (en) | Lubricating oil composition | |
| JP4478471B2 (en) | Grease base oil | |
| JP5538044B2 (en) | Lubricating oil composition with excellent wear resistance | |
| JP5732046B2 (en) | Lubricating oil composition | |
| JP5078068B2 (en) | Lubricating base oil | |
| JP2008280540A (en) | Oil for oil-impregnated bearing, oil-impregnated bearing using the oil, and pressurization motor | |
| JP5521023B2 (en) | Lubricating oil for bearings | |
| JP2007332288A (en) | Bearing oil composition | |
| JP2004051719A (en) | Oil for oil-impregnated bearing, oil-impregnated bearing using the oil, and pressurization motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20160725 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20170118 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20170124 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20170315 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20170404 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20170414 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6130818 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |