JP2016003258A - 変速機用潤滑油組成物 - Google Patents
変速機用潤滑油組成物 Download PDFInfo
- Publication number
- JP2016003258A JP2016003258A JP2014123155A JP2014123155A JP2016003258A JP 2016003258 A JP2016003258 A JP 2016003258A JP 2014123155 A JP2014123155 A JP 2014123155A JP 2014123155 A JP2014123155 A JP 2014123155A JP 2016003258 A JP2016003258 A JP 2016003258A
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- Prior art keywords
- less
- base oil
- branched
- viscosity
- linear
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 70
- 239000000314 lubricant Substances 0.000 title abstract description 10
- 239000002199 base oil Substances 0.000 claims abstract description 81
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- 239000011593 sulfur Substances 0.000 claims abstract description 20
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 20
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 6
- 239000011574 phosphorus Substances 0.000 claims abstract description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 5
- 239000010687 lubricating oil Substances 0.000 claims description 58
- 125000004432 carbon atom Chemical group C* 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 25
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 19
- 230000001050 lubricating effect Effects 0.000 claims description 18
- 239000005077 polysulfide Substances 0.000 claims description 15
- 229920001021 polysulfide Polymers 0.000 claims description 15
- 150000008117 polysulfides Polymers 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 claims description 4
- 239000013256 coordination polymer Substances 0.000 claims description 2
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- -1 phosphorous ester Chemical class 0.000 abstract description 34
- 239000003921 oil Substances 0.000 abstract description 22
- 229910052751 metal Inorganic materials 0.000 abstract description 14
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- 238000009835 boiling Methods 0.000 description 4
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- 0 **OC(C1*)(C1=O)ON Chemical compound **OC(C1*)(C1=O)ON 0.000 description 3
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- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
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- 230000000996 additive effect Effects 0.000 description 3
- 125000002877 alkyl aryl group Chemical group 0.000 description 3
- 125000005119 alkyl cycloalkyl group Chemical group 0.000 description 3
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- 238000001704 evaporation Methods 0.000 description 3
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- 150000004665 fatty acids Chemical class 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 235000003441 saturated fatty acids Nutrition 0.000 description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 3
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 3
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 3
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
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- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-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
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 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
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 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 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 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 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 229940069096 dodecene Drugs 0.000 description 2
- 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 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000003925 fat Substances 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- CKDDRHZIAZRDBW-UHFFFAOYSA-N henicosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCC(O)=O CKDDRHZIAZRDBW-UHFFFAOYSA-N 0.000 description 2
- GOQYKNQRPGWPLP-UHFFFAOYSA-N heptadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 2
- KEMQGTRYUADPNZ-UHFFFAOYSA-N heptadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(O)=O KEMQGTRYUADPNZ-UHFFFAOYSA-N 0.000 description 2
- 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 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 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 2
- GBHRVZIGDIUCJB-UHFFFAOYSA-N hydrogenphosphite Chemical compound OP([O-])[O-] GBHRVZIGDIUCJB-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 238000006317 isomerization reaction Methods 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- ISYWECDDZWTKFF-UHFFFAOYSA-N nonadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCCC(O)=O ISYWECDDZWTKFF-UHFFFAOYSA-N 0.000 description 2
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- 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 2
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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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/32—Heterocyclic sulfur, selenium or tellurium compounds
- C10M135/36—Heterocyclic sulfur, selenium or tellurium compounds the ring containing sulfur and carbon with nitrogen or oxygen
-
- 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
- C10M105/34—Esters of monocarboxylic acids
-
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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
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/20—Thiols; Sulfides; Polysulfides
-
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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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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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
- 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
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/2805—Esters used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
- C10M2207/2815—Esters of (cyclo)aliphatic monocarboxylic acids used as base material
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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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
- C10M2207/2835—Esters of polyhydroxy compounds used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/08—Amides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
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Abstract
【解決手段】(A)100℃動粘度が1.5〜3.5mm2/s、流動点が−25℃以下、粘度指数が105以上、%CPが85以上、%CNが2〜20、%CAが3以下である鉱油系基油を基油組成物全量基準で50〜97質量%、(B)100℃動粘度が2〜10mm2/sのモノエステル系基油を基油組成物全量基準で3〜10質量%含有してなる潤滑油基油に、(C)下記式(I)に示す硫黄を含有する亜リン酸エステルを潤滑油組成物全量基準でリン元素として150〜400質量ppm含有し、組成物の100℃動粘度が2.5〜4.0mm2/sである変速機用潤滑油組成物。
(式(I)中、Rは硫黄を含む炭素数4〜20のヒドロカルビル基、R1は水素原子、炭素数4〜20のヒドロカルビル基または硫黄を含む炭素数4〜20のヒドロカルビル基を示す。)
【選択図】なし
Description
しかしながら、上記手法だけでは粘度温度特性および低温性能と疲労防止性、耐焼付き性の両立が十分に図れておらず、これらの性能を両立させつつその他の諸性能についても問題ない性能を有する潤滑油組成物の開発が求められている。
(B)100℃における動粘度が2mm2/s以上10mm2/s以下のモノエステル系基油を基油組成物全量基準で3〜10質量%含有してなる潤滑油基油に、
(C)下記式(I)に示す硫黄を含有する亜リン酸エステルを潤滑油組成物全量基準でリン元素として150〜400質量ppm含有し、組成物の100℃における動粘度が2.5mm2/s以上4.0mm2/s以下であることを特徴とする変速機用潤滑油組成物である。
(A)成分の100℃における動粘度は、好ましくは2mm2/s以上であり、より好ましくは2.5mm2/s以上、さらに好ましくは2.7mm2/s以上である。また、好ましくは3.3mm2/s以下であり、より好ましくは3.1mm2/s以下である。
(A)成分の100℃における動粘度が3.5mm2/sを超える場合は、粘度温度特性及び低温粘度特性が悪化し、1.5mm2/s未満の場合は、潤滑箇所での油膜形成が不十分となるため金属疲労防止性、耐熱性に劣り、また潤滑油基油の蒸発損失が大きくなるため、それぞれ好ましくない。
なお、脱ろう工程としては溶剤脱ろう、接触脱ろうのいずれの工程を適用してもよいが、低温粘度特性をより改善できる点で接触脱ろう工程であることが特に好ましい。
なお、本発明でいう引火点とは、JIS K 2265(開放式引火点)に準拠して測定された引火点を意味する。
(A)成分の窒素分については、特に制限はないが、熱・酸化安定性により優れる組成物を得ることができる点で、好ましくは5質量ppm以下であり、より好ましくは3質量ppm以下、最も好ましくは実質的に含まれないことが望ましい。
なお、本発明でいう硫黄分及び窒素分の含有量とは、ASTM D4951に準拠して測定される値を意味する。
(1)パラフィン基系原油及び/又は混合基系原油の常圧蒸留による留出油
(2)パラフィン基系原油及び/又は混合基系原油の常圧蒸留残渣油の減圧蒸留による留出油(WVGO)
(3)潤滑油脱ろう工程により得られるワックス(スラックワックス等)及び/又はガストゥリキッド(GTL)プロセス等により得られる合成ワックス(フィッシャートロプシュワックス、GTLワックス等)
(4)基油(1)〜(3)から選ばれる1種又は2種以上の混合油及び/又は当該混合油のマイルドハイドロクラッキング処理油
(5)基油(1)〜(4)から選ばれる2種以上の混合油
(6)基油(1)、(2)、(3)、(4)又は(5)の脱れき油
(7)基油(6)のハイドロクラッキング処理油
(8)基油(1)〜(7)から選ばれる2種以上の混合油
(10)上記基油(1)〜(8)から選ばれる基油又は当該基油から回収された潤滑油留分を水素化異性化し、その生成物又はその生成物から蒸留等により回収される潤滑油留分について溶剤脱ろうや接触脱ろうなどの脱ろう処理を行い、または、当該脱ろう処理をしたあとに蒸留することによって得られる水素化異性化鉱油
また、上記(9)又は(10)の潤滑油基油を得るに際して、必要に応じて溶剤精製処理及び/又は水素化仕上げ処理工程を更に設けてもよい。
本発明において、基油組成物中の(A)成分の含有量は50〜97質量%であり、好ましくは55質量%以上、より好ましくは60質量%以上、さらに好ましくは70質量%以上、特に好ましくは80質量%以上である。基油組成物中の(A)成分の含有量が50質量%未満の場合は、金属疲労防止性および耐熱性が劣る。
鉱油系基油としては、(A)成分以外の鉱油系基油が挙げられる。また合成系基油としては、具体的には、ポリブテン又はその水素化物;1−オクテンオリゴマー、1−デセンオリゴマー、1−ドデセンオリゴマー等のポリ−α−オレフィン又はその水素化物;アルキルナフタレン、アルキルベンゼンの芳香族系合成油又はこれらの混合物等が例示できる。
なかでも1−オクテンオリゴマー、1−デセンオリゴマー、1−ドデセンオリゴマー等のポリ−α−オレフィン又はその水素化物が好ましい。
本発明において、潤滑油基油として、(A)成分および(B)成分以外の他の基油を混合する場合の他の基油の含有量は、潤滑油基油全量基準で、0〜47質量%であり、好ましくは40質量%以下、より好ましくは30質量%以下、さらに好ましくは20質量%以下、特に好ましくは10質量%以下であり、最も好ましくは0質量%である。
なお、本発明の潤滑油基油が、前記(A)成分および(B)成分の混合基油に、さらに他の鉱油系基油および/または合成系基油を含有する基油である場合においても、その潤滑油基油の40℃における動粘度は18mm2/s以下であることが好ましい。
硫黄を含むヒドロカルビル基としては、チオエーテル結合(−CH2−S−CH2−)を主鎖もしくは分枝鎖に含むヒドロカルビル基が挙げられる。
またシクロアルキル基としては、例えばシクロヘキシル基を挙げることができる。
さらにアルキルシクロアルキル基としては、例えば、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等を挙げることができる。アルキル基は直鎖状でも分枝状でもよい。
アリールアルキル基としては、具体的には、ベンジル基、フェニルエチル基、フェニルプロピル基、フェニルブチル基、フェニルペンチル基、フェニルヘキシル基等の炭素数7〜12のアリールアルキル基(これらアルキル基は直鎖状でも分枝状でもよい)を挙げることができる。
−(CH2)m−S−(CH2)n−CH3 (1)
ここで、mは1〜18、好ましくは2〜12、より好ましくは2〜6であり、nは1〜18、好ましくは4〜16、より好ましくは6〜14であり、m+nは3〜19であり、好ましくは5〜17、より好ましくは7〜15である。
これらの中でも −(CH2)2−S−(CH2)8−CH3(3−チアウンデシル)、−(CH2)2−S−(CH2)12−CH3(3−チアペンタデシル)が特に好ましい。
R1−SX−R2 (2)
一般式(2)において、R1は炭素数2〜15のアルケニル基、R2は炭素数2〜15のアルキル基またはアルケニル基を示し、xは1〜8の整数を示す。xは2以上が好ましく、4以上が特に好ましい。
この化合物は炭素数2〜15のオレフィンまたはその2〜4量体を硫黄、塩化硫黄等の硫化剤と反応させることによって得ることができる。
オレフィンとしては、例えば、プロピレン、イソブテン、ジイソブテンなどが好ましく用いられる。
R3−Sy−R4 (3)
一般式(3)において、R3及びR4は、それぞれ個別に、炭素数1〜20のアルキル基(シクロアルキル基も含む)、炭素数6〜20のアリール基、炭素数7〜20のアリールアルキル基又はアルキルアリール基を示し、それらは互いに同一であっても異なっていてもよく、yは2〜8の整数を示す。
100℃における動粘度が2.5mm2/s未満の場合には潤滑部位の油膜保持性および蒸発性に問題を生ずるおそれがあり、100℃における動粘度が4.0mm2/sを超える場合には省燃費性が不足するおそれがある。
ここで言うブルックフィールド粘度とは、ASTM D2983により測定される値である。
また、本発明の潤滑油組成物は、上記以外の変速機油としての性能にも優れており、自動車、建設機械、農業機械等の自動変速機用あるいは手動変速機用、ディファレンシャルギヤ用の潤滑油としても好適に用いられる。その他、摩耗防止性、疲労防止性及び低温粘度特性が要求される潤滑油、例えば、工業用ギヤ油、二輪車、四輪車等の自動車用、発電用、舶用等のガソリンエンジン、ディーゼルエンジン、ガスエンジン用の潤滑油、タービン油、圧縮機油等にも好適に使用することができる。
表1に示すように、本発明の潤滑油組成物(実施例1〜7)、比較用の潤滑油組成物(比較例1〜11)をそれぞれ調製した。得られた組成物について、動粘度、粘度指数、低温粘度特性、疲労防止性、ファレックス焼付性を測定し、その結果を同じく表1に併記した。
ASTM D2983に準拠し、各潤滑油組成物の−40℃におけるブルックフィールド粘度(BF粘度)を測定した。本試験においては、BF粘度の値が小さいものほど低温流動性に優れていることを意味する。
(2)疲労防止性
転がり疲労試験機を用いて、以下の試験条件でピッチング発生寿命を評価した。寿命は50%累積破損確率で示した。
転がり疲労試験機では、試験片はスラストボールベアリング(NSKスラスト玉軸受51305、ボールは3球を使用)を使用した。試験条件は、面圧:5.9GPa、回転数:1500rpm、油温:120℃である。
(3)ファレックス焼き付き性試験
ASTM D3233に準拠し、ファレックス試験機を用い、各潤滑油組成物の290回転、100℃における焼付き荷重を測定した。本試験においては、焼付き荷重が大きいほど耐焼付性に優れていることを意味する。
Claims (2)
- (A)100℃における動粘度が1.5mm2/s以上3.5mm2/s以下、流動点が−25℃以下、粘度指数が105以上、%CPが85以上、%CNが2以上20以下、%CAが3以下である鉱油系基油を基油組成物全量基準で50〜97質量%、
(B)100℃における動粘度が2mm2/s以上10mm2/s以下のモノエステル系基油を基油組成物全量基準で3〜10質量%含有してなる潤滑油基油に、
(C)下記式(I)に示す硫黄を含有する亜リン酸エステルを潤滑油組成物全量基準でリン元素として150〜400質量ppm含有し、組成物の100℃における動粘度が2.5mm2/s以上4.0mm2/s以下であることを特徴とする変速機用潤滑油組成物。
- さらに(D)ポリサルファイド及び/又はチアジアゾールを含有することを特徴とする請求項1に記載の変速機用潤滑油組成物。
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JP2020172642A (ja) * | 2019-04-10 | 2020-10-22 | Eneos株式会社 | 潤滑油組成物 |
JP2021147521A (ja) * | 2020-03-19 | 2021-09-27 | Eneos株式会社 | 潤滑油組成物 |
WO2022075085A1 (ja) * | 2020-10-09 | 2022-04-14 | Eneos株式会社 | 潤滑油組成物 |
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FR3094377B1 (fr) | 2019-04-01 | 2021-05-21 | Total Marketing Services | Composition lubrifiante pour transmission |
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WO2022075088A1 (ja) | 2020-10-09 | 2022-04-14 | Eneos株式会社 | 潤滑油組成物 |
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DE112015002841B4 (de) | 2024-07-18 |
JP6247600B2 (ja) | 2017-12-13 |
US10227541B2 (en) | 2019-03-12 |
DE112015002841T5 (de) | 2017-03-09 |
US20170145337A1 (en) | 2017-05-25 |
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