JP5694028B2 - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
- Publication number
- JP5694028B2 JP5694028B2 JP2011068068A JP2011068068A JP5694028B2 JP 5694028 B2 JP5694028 B2 JP 5694028B2 JP 2011068068 A JP2011068068 A JP 2011068068A JP 2011068068 A JP2011068068 A JP 2011068068A JP 5694028 B2 JP5694028 B2 JP 5694028B2
- Authority
- JP
- Japan
- Prior art keywords
- mass
- lubricating oil
- lead
- oil composition
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010687 lubricating oil Substances 0.000 title claims description 87
- 239000000203 mixture Substances 0.000 title claims description 73
- -1 phosphorus compound Chemical class 0.000 claims description 88
- 239000002199 base oil Substances 0.000 claims description 66
- 229910052751 metal Inorganic materials 0.000 claims description 61
- 239000002184 metal Substances 0.000 claims description 61
- 125000004432 carbon atom Chemical group C* 0.000 claims description 46
- 238000005260 corrosion Methods 0.000 claims description 42
- 230000007797 corrosion Effects 0.000 claims description 41
- 150000001875 compounds Chemical class 0.000 claims description 40
- 239000007769 metal material Substances 0.000 claims description 34
- 229910052698 phosphorus Inorganic materials 0.000 claims description 32
- 239000011574 phosphorus Substances 0.000 claims description 32
- 238000002485 combustion reaction Methods 0.000 claims description 29
- 150000003839 salts Chemical class 0.000 claims description 26
- 229910052717 sulfur Inorganic materials 0.000 claims description 26
- 230000001050 lubricating effect Effects 0.000 claims description 23
- 239000003599 detergent Substances 0.000 claims description 20
- 239000011593 sulfur Substances 0.000 claims description 20
- 239000004593 Epoxy Substances 0.000 claims description 19
- 229960001860 salicylate Drugs 0.000 claims description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 18
- 239000002270 dispersing agent Substances 0.000 claims description 17
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 claims description 17
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 125000002723 alicyclic group Chemical group 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 125000004434 sulfur atom Chemical group 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 5
- WIKSRXFQIZQFEH-UHFFFAOYSA-N [Cu].[Pb] Chemical compound [Cu].[Pb] WIKSRXFQIZQFEH-UHFFFAOYSA-N 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 3
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 2
- 239000011133 lead Substances 0.000 description 56
- 125000000217 alkyl group Chemical group 0.000 description 31
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical group OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 29
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 24
- 150000002430 hydrocarbons Chemical group 0.000 description 22
- 239000003921 oil Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 20
- 239000002585 base Substances 0.000 description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 16
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 15
- 125000003342 alkenyl group Chemical group 0.000 description 15
- 229910052796 boron Inorganic materials 0.000 description 15
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 14
- 229960004889 salicylic acid Drugs 0.000 description 14
- 239000002253 acid Substances 0.000 description 13
- 239000011575 calcium Substances 0.000 description 13
- 239000002904 solvent Substances 0.000 description 13
- 229960002317 succinimide Drugs 0.000 description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 12
- 125000003118 aryl group Chemical group 0.000 description 12
- 229910052791 calcium Inorganic materials 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 239000007789 gas Substances 0.000 description 12
- 238000011282 treatment Methods 0.000 description 12
- 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 12
- 239000000463 material Substances 0.000 description 11
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- 229910000147 aluminium phosphate Inorganic materials 0.000 description 10
- 239000003963 antioxidant agent Substances 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 10
- 238000007254 oxidation reaction Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 230000003078 antioxidant effect Effects 0.000 description 9
- 238000004821 distillation Methods 0.000 description 9
- 229910052750 molybdenum Inorganic materials 0.000 description 9
- 239000011733 molybdenum Substances 0.000 description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 8
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 8
- 150000001336 alkenes Chemical class 0.000 description 8
- 239000003112 inhibitor Substances 0.000 description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 description 8
- 239000011707 mineral Substances 0.000 description 8
- 235000010755 mineral Nutrition 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 229910052783 alkali metal Inorganic materials 0.000 description 7
- 150000001340 alkali metals Chemical class 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 150000004678 hydrides Chemical class 0.000 description 7
- 239000002480 mineral oil Substances 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 229910052749 magnesium Inorganic materials 0.000 description 6
- 235000010446 mineral oil Nutrition 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 238000000746 purification Methods 0.000 description 6
- 150000001342 alkaline earth metals Chemical class 0.000 description 5
- 239000004327 boric acid Substances 0.000 description 5
- 238000004517 catalytic hydrocracking Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 150000005690 diesters Chemical class 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 5
- 229920000768 polyamine Polymers 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 239000004711 α-olefin Substances 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 150000002751 molybdenum Chemical class 0.000 description 4
- 125000005702 oxyalkylene group Chemical group 0.000 description 4
- 150000002978 peroxides Chemical class 0.000 description 4
- 150000003018 phosphorus compounds Chemical class 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229910000978 Pb alloy Inorganic materials 0.000 description 3
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 150000001447 alkali salts Chemical class 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 3
- 239000012964 benzotriazole Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000012990 dithiocarbamate Substances 0.000 description 3
- NAGJZTKCGNOGPW-UHFFFAOYSA-N dithiophosphoric acid Chemical compound OP(O)(S)=S NAGJZTKCGNOGPW-UHFFFAOYSA-N 0.000 description 3
- 238000010828 elution Methods 0.000 description 3
- 150000004665 fatty acids Chemical class 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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- 229910000000 metal hydroxide Inorganic materials 0.000 description 3
- 150000004692 metal hydroxides Chemical class 0.000 description 3
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- 125000001841 imino group Chemical group [H]N=* 0.000 description 2
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- ZXRDVSMSMOZCPT-UHFFFAOYSA-N phosphorodithious acid Chemical compound OP(S)S ZXRDVSMSMOZCPT-UHFFFAOYSA-N 0.000 description 2
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- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical compound OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 description 2
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- 238000010998 test method Methods 0.000 description 2
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- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 2
- ITRFOBBKTCNNFN-UHFFFAOYSA-N tris(sulfanyl)-sulfanylidene-$l^{5}-phosphane Chemical compound SP(S)(S)=S ITRFOBBKTCNNFN-UHFFFAOYSA-N 0.000 description 2
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical class O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- DUIOPKIIICUYRZ-UHFFFAOYSA-N semicarbazide Chemical compound NNC(N)=O DUIOPKIIICUYRZ-UHFFFAOYSA-N 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-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
- 150000003568 thioethers Chemical class 0.000 description 1
- ABVVEAHYODGCLZ-UHFFFAOYSA-N tridecan-1-amine Chemical compound CCCCCCCCCCCCCN ABVVEAHYODGCLZ-UHFFFAOYSA-N 0.000 description 1
- 239000010723 turbine oil Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Lubricants (AREA)
Description
本発明における(A)潤滑油基油は、特に制限はなく、通常の潤滑油に使用される鉱油系基油、合成系基油が使用できる。鉱油系基油としては、具体的には、原油を常圧蒸留して得られる常圧残油を減圧蒸留して得られた潤滑油留分を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、水素化精製等の処理を1つ以上行って精製したもの、あるいはワックス異性化鉱油、GTL WAX(ガストゥリキッドワックス)を異性化する手法で製造される基油等が例示できる。
(1)パラフィン基系原油および/また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および/また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)および/また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種または2種以上の混合油および/また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)または(5)の脱れき油(DAO)。
(7)基油(6)のマイルドハイドロクラッキング処理油(MHC)。
(8)基油(1)〜(7)から選ばれる2種以上の混合油。
(9)上記基油(1)〜(8)から選ばれる基油または当該基油から回収された潤滑油留分を水素化分解し、その生成物また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後に蒸留することによって得られる水素化分解鉱油。
(10)上記基油(1)〜(8)から選ばれる基油また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、その生成物また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。
(A1)100℃における動粘度が、3.5mm2以上、好ましくは6mm2/s以上、また12mm2/s以下、好ましくは9mm2/s以下、さらに好ましくは8mm2/s以下、粘度指数が120以上、かつ%CAが1以下の鉱油系基油
(A2)100℃における動粘度が、9mm2/s以上、好ましくは10mm2/s以上、また14mm2/s以下、好ましくは12mm2/s以下の鉱油系基油
なお、上記飽和分とは、ASTM D2549に準拠して測定した飽和分を意味する。
本発明の潤滑油組成物において用いられる(C)エポキシ化合物としては、様々な化合物を挙げることができるが、脂環式エポキシ化合物、その誘導体およびグリシジルエステル型エポキシ化合物が好ましい。
なお、本発明においては、グリシジルエステル化合物および/または脂環式エポキシ化合物を単独で用いてもよく、また2種以上を組み合わせて用いてもよい。
炭化水素基は、エチレン、プロピレン、ブチレン等の重合体又は共重合体等から誘導されるアルキル基、特にエチレン重合体等の直鎖α−オレフィンから誘導されるアルキル基であることが好ましい。
なお、サリシレート系清浄剤(D)は通常潤滑油基油等の希釈剤を含む形で配合される。
ホウ素化無灰分散剤とは、潤滑油に用いられる任意の無灰分散剤をホウ素化したものである。
無灰分散剤としては、前記のモノタイプ又はビスタイプのコハク酸イミドのいずれか一方を含有してもよく、あるいは双方を含有してもよい。
R13‐NH−(CH2CH2NH)s−H (6)
一般式(6)において、R13は、炭素数40〜400のアルキル基又はアルケニル基、好ましくは60〜350のアルキル基又はアルケニル基を示し、kは1〜5、好ましくは2〜4の整数を示す。
ホウ酸変性コハク酸イミドの製造方法としては、例えば、特公昭42-8013号公報及び同42-8014号公報、特開昭51-52381号公報、及び特開昭51-130408号公報等に開示されている方法等が挙げられる。具体的には例えば、アルコール類やヘキサン、キシレン等の有機溶媒、軽質潤滑油基油等にポリアミンとポリアルケニルコハク酸(無水物)にホウ酸、ホウ酸エステル、又はホウ酸塩等のホウ素化合物を混合し、適当な条件で加熱処理することにより得ることができる。なお、この様にして得られるホウ酸性コハク酸イミドのホウ酸含有量は通常0.1〜4.0質量%とすることができる。
表1に示すように、本発明の潤滑油組成物(実施例1〜3)および比較用の潤滑油組成物(比較例1〜4)を調製した。これらの組成物について、NOx吹込試験およびパネルコーキング試験を行い、鉛(Pb)溶出量およびコーキング重量を測定した。その結果を表1に示す。
なお、パネルコーキング試験は、Federal Test Method 791B-3462に準拠し、パネル温度310℃、油温100℃、テスト時間3時間としてアルミニウムパネルに付着するカーボン量(mg)を評価することにより清浄性を評価した。
Claims (6)
- (A)潤滑油基油に、(B)一般式(1)および/または一般式(2)で表されるリン化合物、それらの金属塩、それらのアミン塩、及びこれらの誘導体からなる群より選ばれる少なくとも1種のリン化合物をリン量として0.01質量%以上0.1質量%以下、および(C)エポキシ化合物を0.05質量%以上1.0質量%以下含有してなる潤滑油組成物であって、摺動部に鉛含有金属材料が使用されている内燃機関に使用されることを特徴とする潤滑油組成物。
子を示し、そのうち少なくともひとつが酸素であり、R1、R2及びR3は、それぞれ個別に水素原子又は炭素数1〜30の炭化水素基を示す。)
硫黄原子(X4、X5及びX6の1つ又は2つが単結合又は(ポリ)オキシアルキレン基
でもよい。)を示し、そのうち少なくともひとつが酸素であり、R4、R5及びR6は、それぞれ個別に水素原子又は炭素数1〜30の炭化水素基を示す。) - (A)潤滑油基油が、100℃における動粘度が5〜12mm2/sであり、%CAが6以下であることを特徴とする請求項1に記載の潤滑油組成物。
- (B)リン化合物が、硫黄を含有しないリン化合物であることを特徴とする請求項1又は2に記載の潤滑油組成物。
- (C)エポキシ化合物が、脂環式エポキシ化合物、その誘導体およびグリシジルエステル型エポキシ化合物から選ばれる化合物であることを特徴とする請求項1〜3のいずれかに記載の潤滑油組成物。
- さらに(D)サリシレート系金属清浄剤、(E)有機モリブデン化合物、および(F)ホウ素化無灰分散剤から選ばれる少なくとも1種の添加剤を含有することを特徴とする請求項1〜4のいずれかに記載の潤滑油組成物。
- 請求項1〜5のいずれかに記載の潤滑油組成物を摺動部に鉛含有金属材料が使用されている内燃機関に使用することにより、銅−鉛含有金属材料あるいは銅含有金属材料と鉛含有金属材料の両方の腐食又は腐食摩耗を抑制し、かつ内燃機関のピストン燃焼面およびピストン燃焼面裏側のデポジットを減少させる方法。
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