JP5261277B2 - 油圧作動油用基油、及び組成物 - Google Patents
油圧作動油用基油、及び組成物 Download PDFInfo
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- JP5261277B2 JP5261277B2 JP2009114919A JP2009114919A JP5261277B2 JP 5261277 B2 JP5261277 B2 JP 5261277B2 JP 2009114919 A JP2009114919 A JP 2009114919A JP 2009114919 A JP2009114919 A JP 2009114919A JP 5261277 B2 JP5261277 B2 JP 5261277B2
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- Prior art keywords
- meth
- base oil
- acrylate
- oil
- hydraulic fluid
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- 239000002199 base oil Substances 0.000 title claims abstract description 142
- 239000000203 mixture Substances 0.000 title claims abstract description 77
- 239000012530 fluid Substances 0.000 title claims description 74
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 64
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 45
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002480 mineral oil Substances 0.000 claims abstract description 42
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 39
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 39
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- 239000000178 monomer Substances 0.000 claims description 29
- 239000000654 additive Substances 0.000 claims description 25
- 125000000217 alkyl group Chemical group 0.000 claims description 25
- 230000000996 additive effect Effects 0.000 claims description 21
- 239000002904 solvent Substances 0.000 claims description 15
- 150000002430 hydrocarbons Chemical class 0.000 claims description 11
- 229930195733 hydrocarbon Natural products 0.000 claims description 10
- 125000003342 alkenyl group Chemical group 0.000 claims description 9
- 239000004215 Carbon black (E152) Substances 0.000 claims description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 7
- 239000000470 constituent Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 20
- 239000010720 hydraulic oil Substances 0.000 abstract description 17
- 230000003197 catalytic effect Effects 0.000 abstract description 14
- 230000005540 biological transmission Effects 0.000 abstract description 13
- -1 alkylnaphthalene Chemical class 0.000 description 54
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- 150000004678 hydrides Chemical class 0.000 description 12
- 150000001875 compounds Chemical class 0.000 description 11
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 11
- 239000011148 porous material Substances 0.000 description 9
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- 239000002184 metal Substances 0.000 description 7
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- 150000002148 esters Chemical class 0.000 description 6
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- 238000004519 manufacturing process Methods 0.000 description 6
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- 239000012184 mineral wax Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 230000008961 swelling Effects 0.000 description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 5
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- 239000003599 detergent Substances 0.000 description 5
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- 239000000314 lubricant Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 4
- 238000004517 catalytic hydrocracking Methods 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 4
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 125000002947 alkylene group Chemical group 0.000 description 3
- 150000001412 amines Chemical group 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 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 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
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- 125000000623 heterocyclic group Chemical group 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
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- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 2
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 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 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 235000019484 Rapeseed oil Nutrition 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- MZVQCMJNVPIDEA-UHFFFAOYSA-N [CH2]CN(CC)CC Chemical group [CH2]CN(CC)CC MZVQCMJNVPIDEA-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 125000001204 arachidyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
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- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 125000003901 ceryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
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- DYVHFPDDBMMBAX-BYYHNAKLSA-N ditetradecyl (e)-but-2-enedioate Chemical compound CCCCCCCCCCCCCCOC(=O)\C=C\C(=O)OCCCCCCCCCCCCCC DYVHFPDDBMMBAX-BYYHNAKLSA-N 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
- 230000002708 enhancing effect Effects 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 125000002463 lignoceryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
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- 235000011121 sodium hydroxide Nutrition 0.000 description 1
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- 239000003760 tallow Substances 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
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- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 1
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
- C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/02—Well-defined hydrocarbons
- C10M105/04—Well-defined hydrocarbons aliphatic
-
- 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
- C10M2203/04—Well-defined cycloaliphatic compounds
- C10M2203/045—Well-defined cycloaliphatic compounds used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
-
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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Description
(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留出油(WVGO);
(3) 潤滑油脱ろう工程により得られるワックス及び/又はGTLプロセス等により製造されるフィッシャートロプシュワックス;
(4) (1)〜(3)の中から選ばれる1種又は2種以上の混合油のマイルドハイドロクラッキング処理油(MHC);
(5) (1)〜(4)の中から選ばれる2種以上の油の混合油;
(6) (1)、(2)、(3)、(4)又は(5)の脱暦油(DAO);
(7) (6)のマイルドハイドロクラッキング処理油(MHC);
(8) (1)〜(7)の中から選ばれる2種以上の油の混合油などを原料油とし、この原料油および/またはこの原料油から回収された潤滑油留分を、通常の精製方法によって精製し、潤滑油留分を回収することによって得られる潤滑油。
(ア)水素化分解、水素化仕上げなどの水素化精製;
(イ)フルフラール溶剤抽出などの溶剤精製;
(ウ)溶剤脱ろうや接触脱ろうなどの脱ろう;
(エ)酸性白土や活性白土などによる白土精製;
(オ)硫酸洗浄、苛性ソーダ洗浄などの薬品(酸またはアルカリ)精製
などが挙げられる。本発明ではこれらの1つ又は2つ以上を任意の組み合わせ及び任意の順序で採用することができる。本発明における油圧作動油用基油(A)としては、上記に挙げた脱ろう方法のいずれを採用しても良いが、接触脱ろう処理された基油であることが好ましく、接触異性化脱ろう処理された基油であることがさらに好ましく、水素化異性化脱ろう処理された基油であることが特に好ましい。接触脱ろう処理された基油を使用することで、例えば流動点等の低温性状や基油組成がほぼ同じである溶剤脱ろう処理基油を使用した場合と比べ、より低温でのフィルタビリティに優れる油圧作動油組成物を得ることができる。
(A1)100℃における動粘度が3.5〜4.5mm2/s、好ましくは3.8〜4.3mm2/sである基油;
(A2)100℃における動粘度が1.5〜3.5mm2/s、好ましくは2.5〜3.5mm2/s、特に好ましくは3〜3.4mm2/sである基油;
及び(A1)と(A2)との混合基油が挙げられる。
(a)化学シフト約10−50ppmの積分強度の合計(炭化水素の全炭素に起因する積分強度の合計)、及び
(b)化学シフト約27.9−28.1ppm、28.4−28.6ppm、32.6−33.2ppm、34.4−34.6ppm、37.4−37.6ppm、38.8−39.1ppm、及び、40.4−40.6ppmの積分強度の合計(メチル基、エチル基及びその他分岐基がついた3級炭素及びナフテン3級炭素に起因する積分強度の合計)をそれぞれ測定し、(a)100%とした時の(b)の割合(%)を算出した。(b)の割合は基油を構成する全炭素原子に対する全3級炭素原子の割合を示す。
(B)100℃における動粘度が1.5〜6mm2/sであり、かつアニリン点が106℃未満の鉱油系基油;
(C)100℃における動粘度が1.5〜6mm2/sであり、アニリン点が106℃以上であって、溶剤脱ろう処理され、かつ基油を構成する炭化水素における全炭素に占める3級炭素の割合が7.4%未満である鉱油系基油;
(D)(A)、(B)及び(C)のいずれにも該当しない鉱油系基油
(B1)100℃における動粘度が1.5〜6mm2/s、好ましくは3.5〜4.5mm2/s、アニリン点が106℃未満、好ましくは90〜104℃である鉱油系基油、具体的にはこのような性状を有する溶剤精製鉱油のような鉱油系基油が挙げられる。(B1)の粘度指数が好ましくは80〜110、より好ましくは95〜105、流動点が好ましくは−10〜−35℃、より好ましくは−15〜−25℃、%CPが好ましくは60〜70、%CAが好ましくは2〜10、より好ましくは3〜8である。
(B2)100℃における動粘度が1.5〜6mm2/s、好ましくは2〜3.5mm2/s、アニリン点が106℃未満、より好ましくは100〜105℃の鉱油系基油、具体的にはこのような性状を有する水素化分解鉱油及び/又はワックス異性化鉱油のような鉱油系基油が挙げられる。(B2)の粘度指数は好ましくは80〜115、より好ましくは100〜115、特に好ましくは105〜110、流動点が好ましくは−10℃以下、より好ましくは−25〜−35℃、%CPが好ましくは70〜85、より好ましくは75〜80、%CAが好ましくは2以下、より好ましくは0.3〜1.5、%CNが好ましくは15〜30、より好ましくは21〜26である。(B2)は、また、溶剤脱ろう工程により脱ろう処理された水素化分解鉱油及び/又はワックス異性化鉱油であって、基油を構成する炭化水素における全炭素に占める3級炭素の割合が7.4%未満である鉱油系基油に相当するものが挙げられる。
(E1)成分としては、具体的には、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n−又はi−プロピル(メタ)アクリレート、n−、i−又はsec−ブチル(メタ)アクリレート等が挙げられ、メチル(メタ)アクリレートが好ましい。
(E2)成分としては、具体的には、オクチル(メタ)アクリレート、ノニル(メタ)アクリレート、デシル(メタ)アクリレート、ウンデシル(メタ)アクリレート、ドデシル(メタ)アクリレート、トリデシル(メタ)アクリレート、テトラデシル(メタ)アクリレート、ペンタデシル(メタ)アクリレート(これらは直鎖でも分枝状であってもよい。);オクテニル(メタ)アクリレート、ノネニル(メタ)アクリレート、デセニル(メタ)アクリレート、ウンデセニル(メタ)アクリレート、ドデセニル(メタ)アクリレート、トリデセニル(メタ)アクリレート、テトラデセニル(メタ)アクリレート、ペンタデセニル(メタ)アクリレート(これらは直鎖でも分枝状であってもよい。)等が挙げられ、炭素数12〜15の直鎖アルキル基を主成分として有する(メタ)アクリレートが好ましい。
(E3)成分としては、好ましくは炭素数16〜20の直鎖アルキル基、より好ましくは炭素数16又は18の直鎖アルキル基を有する(メタ)アクリレートであり、具体的には、n−ヘキサデシル(メタ)アクリレート、n−オクタデシル(メタ)アクリレート、n−イコシル(メタ)アクリレート、n−ドコシル(メタ)アクリレート、n−テトラコシル(メタ)アクリレート、n−ヘキサコシル(メタ)アクリレート、n−オクタコシル(メタ)アクリレート等が挙げられ、特に、n−ヘキサデシル(メタ)アクリレート、n−オクタデシル(メタ)アクリレートが好ましい。
(E4)成分としては、好ましくは炭素数20〜28の分枝アルキル基、より好ましくは炭素数22〜26分枝アルキル基を有する(メタ)アクリレートであり、具体的には、分枝ヘキサデシル(メタ)アクリレート、分枝オクタデシル(メタ)アクリレート、分枝イコシル(メタ)アクリレート、分枝ドコシル(メタ)アクリレート、分枝テトラコシル(メタ)アクリレート、分枝ヘキサコシル(メタ)アクリレート、分枝オクタコシル(メタ)アクリレート等が挙げられ、好ましくは−C−C(R5)R6で表されるような、炭素数16〜30、好ましくは炭素数20〜28、より好ましくは炭素数22〜26の分枝アルキル基を有する(メタ)アクリレートが挙げられる。ここで、R5及びR6は、R4の炭素数が16〜30となる限りにおいて何ら制限はないが、R5としては、好ましくは炭素数6〜12、より好ましくは炭素数10〜12の直鎖アルキル基、R6としては、好ましくは炭素数10〜16、より好ましくは炭素数14〜16の直鎖アルキル基である。
(E4)成分としては、より具体的には、2−デシル−テトラデシル(メタ)アクリレート、2−ドデシル−ヘキサデシル(メタ)アクリレート、2−デシル−テトラデシルオキシエチル(メタ)アクリレート等の炭素数20〜30の分枝状アルキル基を有する(メタ)アクリレートが挙げられる。
(E5)成分としては、アミド基含有ビニルモノマー、ニトロ基含有モノマー、1〜3級アミノ基含有ビニルモノマー、含窒素複素環含有ビニルモノマー及びこれらの塩酸塩、硫酸塩、燐酸塩、低級アルキル(炭素数1〜8)モノカルボン酸塩、第4級アンモニウム塩基含有ビニルモノマー、酸素及び窒素を含有する両性ビニルモノマー、ニトリル基含有モノマー、脂肪族炭化水素系ビニルモノマー、脂環式炭化水素系ビニルモノマー、芳香族炭化水素系ビニルモノマー、ビニルエステル、ビニルエーテル、ビニルケトン類、エポキシ基含有ビニルモノマー、ハロゲン元素含有ビニルモノマー、不飽和ポリカルボン酸のエステル、ヒドロキシル基含有ビニルモノマー、ポリオキシアルキレン鎖含有ビニルモノマー、アニオン性基、燐酸基、スルホン酸基、又は硫酸エステル基含有イオン性基含有ビニルモノマー含有ビニルモノマー及びこれらの1価金属塩、2価金属塩、アミン塩若しくはアンモニウム塩等が挙げられる。(E5)成分としては、具体的には、これらのうち、4−ジフェニルアミン(メタ)アクリルアミド、2−ジフェニルアミン(メタ)アクリルアミド、ジメチルアミノエチル(メタ)アクリルアミド、ジエチルアミノエチル(メタ)アクリルアミド、ジメチルアミノプロピル(メタ)アクリルアミド、ジメチルアミノメチルメタクリレート、ジエチルアミノメチルメタクリレート、ジメチルアミノエチル(メタ)アクリレート、ジエチルアミノエチル(メタ)アクリレート、モルホリノメチルメタクリレート、モルホリノエチルメタクリレート、2−ビニル−5−メチルピリジン、N−ビニルピロリドン等の窒素含有モノマーが好ましい例として挙げられる。
1)(E1)及び(E2)の共重合体である非分散型ポリ(メタ)アクリレート又はその水素化物、
2)(E2)及び(E3)の共重合体である非分散型ポリ(メタ)アクリレート又はその水素化物、
3)(E1)、(E2)及び(E3)の共重合体である非分散型ポリ(メタ)アクリレート又はその水素化物、
4)(E1)、(E2)、(E3)及び(E4)の共重合体である非分散型ポリ(メタ)アクリレート又はその水素化物、
5)(E1)、(E2)及び(E5)の共重合体である分散型ポリ(メタ)アクリレート又はその水素化物、
6)(E1)、(E2)、(E3)及び(E5)の共重合体である分散型ポリ(メタ)アクリレート又はその水素化物、
7)(E1)、(E2)、(E3)、(E4)及び(E5)の共重合体である分散型ポリ(メタ)アクリレート又はその水素化物、
が挙げられ、上記1)〜4)の非分散型ポリ(メタ)アクリレート系化合物であることがより好ましく、上記2)〜4)の非分散型ポリ(メタ)アクリレート系化合物であることがさらに好ましく、上記3)の非分散型ポリ(メタ)アクリレート系化合物であることが特に好ましい。
これらの組み合わせにより流動点やBF粘度などの低温粘度特性を改善し、低温から高温における粘度温度特性を改善するとともに本発明の効果を高めるために有効である。
(F1)不飽和エステルを含むモノマーの(共)重合体;
(F2)ポリアルキレングリコールのカルボン酸エステル;
(F3)ヒドロカルビルアミン、該アミンとカルボン酸との反応生成物;
(F4)フェノール樹脂;
及びこれらの混合物等が挙げられる。
本発明の潤滑油組成物に極圧剤を配合する場合、その配合量は、通常、組成物全量基準で0.1〜10質量%、好ましくは0.5〜5質量%である。
本発明の潤滑油組成物に分散剤を配合する場合、その配合量は、通常、組成物全量基準で0.1〜15質量%、好ましくは0.5〜10質量%である。
本発明の潤滑油組成物に金属系清浄剤を配合する場合、その配合量は、通常、組成物全量基準で0.1〜15質量%、好ましくは0.5〜10質量%である。
本発明においては、上記摩擦調整剤の中から任意に選ばれる1種類あるいは2種類以上の化合物を任意の量で含有させることができるが、通常、その含有量は、組成物全量基準で0.01〜5質量%、好ましくは0.03〜3質量%である。
これらの中から任意に選ばれた1種類あるいは2種類以上の化合物は、任意の量を含有させることができるが、通常、その含有量は、潤滑油組成物全量基準で0.01〜5質量%、好ましくは0.1〜3質量%であるのが望ましい。
これらの中から任意に選ばれた1種類あるいは2種類以上の化合物を任意の量で配合することができる。
表1に示す組成の本発明の油圧作動油基油を使用した油圧作動油組成物(実施例1〜5)及び比較用の本発明の規定を満たさない油圧作動油基油を使用した油圧作動油組成物(比較例1及び2)をそれぞれ調製した。得られた組成物について下記に示す条件によって低温フィルタビリティ試験を実施し、その結果を表2に併記した。
試験装置:JIS K 2888「軽油の目詰まり点試験法」で規定される装置及びろ過器、直径12.5mm、細孔径20〜30μmのオイルフィルタを用い、200mlの試料を当該装置にセットした。試料温度を25℃で30分保持後、5℃/hの冷却速度で−30℃まで冷却し、10時間静置後、吸引圧100.0kPaで吸引ろ過を開始した。
供試油の吸引量が20mlとなるまでの時間(秒)をろ過時間とした。なお、ここでの「吸引圧100.0kPa」とは、「絶対圧で1.3kPa」、すなわち「大気圧(101.3kPa)に対し−100.0kPa」、あるいは「大気圧に対し100.0kPaの減圧又は差圧」を意味している。
Claims (7)
- 基油全量基準で、
100℃における動粘度が3.8〜4.3mm2/s、流動点が−10℃以下、粘度指数が120〜160、%CPが75以上、%CAが2以下、アニリン点が106〜125℃であり、構成する全炭素に占める3級炭素の割合が7.4%以上である鉱油系基油(A1)、
100℃における動粘度が1.5〜3.5mm2/s、流動点が−45〜−25℃、粘度指数が100以上、%CPが70以上、%CAが2以下、アニリン点が106〜125℃であり、構成する全炭素に占める3級炭素の割合が7.4%以上である鉱油系基油(A2)、
又は(A1)と(A2)の混合基油
からなる油圧作動油用基油(A);10〜100質量%、
(B)100℃における動粘度が1.5〜6mm2/sであり、かつアニリン点が106℃未満の鉱油系基油;0質量%又は50質量%以下、
(C)100℃における動粘度が1.5〜6mm2/sであり、アニリン点が106℃以上であって、溶剤脱ろう処理され、かつ基油を構成する炭化水素における全炭素に占める3級炭素の割合が7.4%未満である鉱油系基油;0〜90質量%、
である油圧作動油基油に、
以下の(E1)〜(E5)から選ばれるモノマーの2種以上を共重合させて得られるポリ(メタ)アクリレート系添加剤、あるいは該ポリ(メタ)アクリレート系添加剤から選ばれる2種以上の混合物を含有することを特徴とする油圧作動油組成物。
(E1)炭素数1〜4のアルキル基を有する(メタ)アクリレート、
(E2)炭素数5〜15のアルキル基又はアルケニル基を有する(メタ)アクリレート、
(E3)炭素数16〜30の直鎖アルキル基又はアルケニル基を有する(メタ)アクリレート、
(E4)炭素数16〜30の分枝アルキル基又はアルケニル基を有する(メタ)アクリレート、
(E5)極性基含有モノマー - 基油全量基準で、前記油圧作動油用基油(A)の割合が10〜90質量%、前記鉱油系基油(B)の割合が0質量%又は50質量%以下、前記鉱油系基油(C)の割合が10〜90質量%であることを特徴とする請求項1に記載の油圧作動油組成物。
- 前記ポリ(メタ)アクリレート系添加剤が、少なくとも(E1)及び(E2)を含むモノマーを共重合させて得られるポリ(メタ)アクリレート系添加剤であることを特徴とする請求項1又は2に記載の油圧作動油組成物。
- 前記ポリ(メタ)アクリレート系添加剤が、少なくとも(E1)、(E2)及び(E3)を含むモノマーを共重合させて得られるポリ(メタ)アクリレート系添加剤であることを特徴とする請求項1又は2に記載の油圧作動油組成物。
- 前記ポリ(メタ)アクリレート系添加剤が、少なくともメチル(メタ)アクリレート、炭素数12〜15の直鎖アルキル基を主成分として有する(メタ)アクリレート及び炭素数16又は18の直鎖アルキル基を有する(メタ)アクリレートを含むモノマーを共重合させて得られるポリ(メタ)アクリレート系添加剤であることを特徴とする請求項1又は2に記載の油圧作動油組成物。
- −40℃におけるブルックフィールド粘度が21000mPa・s以下であることを特徴とする請求項1〜5のいずれかの項に記載の油圧作動油組成物。
- −40℃におけるブルックフィールド粘度が15000mPa・s以下であることを特徴とする請求項1〜5のいずれかの項に記載の油圧作動油組成物。
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