JP5687951B2 - ディーゼルエンジン用潤滑油組成物 - Google Patents
ディーゼルエンジン用潤滑油組成物 Download PDFInfo
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- JP5687951B2 JP5687951B2 JP2011104510A JP2011104510A JP5687951B2 JP 5687951 B2 JP5687951 B2 JP 5687951B2 JP 2011104510 A JP2011104510 A JP 2011104510A JP 2011104510 A JP2011104510 A JP 2011104510A JP 5687951 B2 JP5687951 B2 JP 5687951B2
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- zinc
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- lubricating oil
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- 239000000203 mixture Substances 0.000 title claims description 45
- 239000010687 lubricating oil Substances 0.000 title claims description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 70
- 229910052757 nitrogen Inorganic materials 0.000 claims description 50
- 239000002199 base oil Substances 0.000 claims description 44
- 239000011701 zinc Substances 0.000 claims description 31
- 239000003963 antioxidant agent Substances 0.000 claims description 28
- 150000001412 amines Chemical class 0.000 claims description 24
- 230000003078 antioxidant effect Effects 0.000 claims description 23
- 229910052725 zinc Inorganic materials 0.000 claims description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 21
- 229910052717 sulfur Inorganic materials 0.000 claims description 17
- 239000011593 sulfur Substances 0.000 claims description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 15
- 230000003749 cleanliness Effects 0.000 claims description 15
- 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 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 12
- 229910052796 boron Inorganic materials 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 7
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000001384 succinic acid Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 150000003949 imides Chemical class 0.000 claims description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 claims description 2
- 229960001860 salicylate Drugs 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- FPPZQGWDBRTKFZ-UHFFFAOYSA-N [N].O=C1CCC(=O)N1 Chemical compound [N].O=C1CCC(=O)N1 FPPZQGWDBRTKFZ-UHFFFAOYSA-N 0.000 claims 1
- OCIIUBZAZSWZAK-UHFFFAOYSA-K [Zn+2].P(=S)([S-])([O-])[O-].[Zn+2] Chemical compound [Zn+2].P(=S)([S-])([O-])[O-].[Zn+2] OCIIUBZAZSWZAK-UHFFFAOYSA-K 0.000 claims 1
- 239000008186 active pharmaceutical agent Substances 0.000 claims 1
- -1 for example Substances 0.000 description 42
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 37
- 229960002317 succinimide Drugs 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 18
- 239000002184 metal Substances 0.000 description 18
- 125000003342 alkenyl group Chemical group 0.000 description 12
- 239000003599 detergent Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 239000010705 motor oil Substances 0.000 description 10
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 9
- 239000002270 dispersing agent Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229920000098 polyolefin Polymers 0.000 description 9
- 239000010710 diesel engine oil Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 229910052698 phosphorus Inorganic materials 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 230000000994 depressogenic effect Effects 0.000 description 5
- 238000000921 elemental analysis Methods 0.000 description 5
- 229920000768 polyamine Polymers 0.000 description 5
- 229940014800 succinic anhydride Drugs 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 239000006078 metal deactivator Substances 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000193 polymethacrylate Polymers 0.000 description 4
- DKCPKDPYUFEZCP-UHFFFAOYSA-N 2,6-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=CC(C(C)(C)C)=C1O DKCPKDPYUFEZCP-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 2
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 2
- ICKWICRCANNIBI-UHFFFAOYSA-N 2,4-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C(C(C)(C)C)=C1 ICKWICRCANNIBI-UHFFFAOYSA-N 0.000 description 2
- JZODKRWQWUWGCD-UHFFFAOYSA-N 2,5-di-tert-butylbenzene-1,4-diol Chemical compound CC(C)(C)C1=CC(O)=C(C(C)(C)C)C=C1O JZODKRWQWUWGCD-UHFFFAOYSA-N 0.000 description 2
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- CGRTZESQZZGAAU-UHFFFAOYSA-N [2-[3-[1-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]-2-methylpropan-2-yl]-2,4,8,10-tetraoxaspiro[5.5]undecan-9-yl]-2-methylpropyl] 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCC(C)(C)C2OCC3(CO2)COC(OC3)C(C)(C)COC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 CGRTZESQZZGAAU-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 150000001565 benzotriazoles Chemical class 0.000 description 2
- FQUNFJULCYSSOP-UHFFFAOYSA-N bisoctrizole Chemical compound N1=C2C=CC=CC2=NN1C1=CC(C(C)(C)CC(C)(C)C)=CC(CC=2C(=C(C=C(C=2)C(C)(C)CC(C)(C)C)N2N=C3C=CC=CC3=N2)O)=C1O FQUNFJULCYSSOP-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 150000002990 phenothiazines Chemical class 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 229920013639 polyalphaolefin Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 235000013824 polyphenols Nutrition 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical class C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 1
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical class C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 1
- PWNBRRGFUVBTQG-UHFFFAOYSA-N 1-n,4-n-di(propan-2-yl)benzene-1,4-diamine Chemical compound CC(C)NC1=CC=C(NC(C)C)C=C1 PWNBRRGFUVBTQG-UHFFFAOYSA-N 0.000 description 1
- IHWDIGHWDQPQMQ-UHFFFAOYSA-N 1-octadecylsulfanyloctadecane Chemical compound CCCCCCCCCCCCCCCCCCSCCCCCCCCCCCCCCCCCC IHWDIGHWDQPQMQ-UHFFFAOYSA-N 0.000 description 1
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- BAXOFTOLAUCFNW-UHFFFAOYSA-N 1H-indazole Chemical compound C1=CC=C2C=NNC2=C1 BAXOFTOLAUCFNW-UHFFFAOYSA-N 0.000 description 1
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 1
- SNTWKPAKVQFCCF-UHFFFAOYSA-N 2,3-dihydro-1h-triazole Chemical class N1NC=CN1 SNTWKPAKVQFCCF-UHFFFAOYSA-N 0.000 description 1
- OPLCSTZDXXUYDU-UHFFFAOYSA-N 2,4-dimethyl-6-tert-butylphenol Chemical compound CC1=CC(C)=C(O)C(C(C)(C)C)=C1 OPLCSTZDXXUYDU-UHFFFAOYSA-N 0.000 description 1
- ZBADMMCYTSORHN-UHFFFAOYSA-N 2,5-bis(dodecyldisulfanyl)-1,3,4-thiadiazole Chemical compound CCCCCCCCCCCCSSC1=NN=C(SSCCCCCCCCCCCC)S1 ZBADMMCYTSORHN-UHFFFAOYSA-N 0.000 description 1
- ZGWOXISFZXPTGJ-UHFFFAOYSA-N 2,5-bis(heptyldisulfanyl)-1,3,4-thiadiazole Chemical compound CCCCCCCSSC1=NN=C(SSCCCCCCC)S1 ZGWOXISFZXPTGJ-UHFFFAOYSA-N 0.000 description 1
- MGEQSWVPSCZGEK-UHFFFAOYSA-N 2,5-bis(nonyldisulfanyl)-1,3,4-thiadiazole Chemical compound CCCCCCCCCSSC1=NN=C(SSCCCCCCCCC)S1 MGEQSWVPSCZGEK-UHFFFAOYSA-N 0.000 description 1
- LKALLEFLBKHPTQ-UHFFFAOYSA-N 2,6-bis[(3-tert-butyl-2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound OC=1C(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=CC(C)=CC=1CC1=CC(C)=CC(C(C)(C)C)=C1O LKALLEFLBKHPTQ-UHFFFAOYSA-N 0.000 description 1
- BVUXDWXKPROUDO-UHFFFAOYSA-N 2,6-di-tert-butyl-4-ethylphenol Chemical compound CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 BVUXDWXKPROUDO-UHFFFAOYSA-N 0.000 description 1
- SLUKQUGVTITNSY-UHFFFAOYSA-N 2,6-di-tert-butyl-4-methoxyphenol Chemical compound COC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SLUKQUGVTITNSY-UHFFFAOYSA-N 0.000 description 1
- VMZVBRIIHDRYGK-UHFFFAOYSA-N 2,6-ditert-butyl-4-[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VMZVBRIIHDRYGK-UHFFFAOYSA-N 0.000 description 1
- QHPKIUDQDCWRKO-UHFFFAOYSA-N 2,6-ditert-butyl-4-[2-(3,5-ditert-butyl-4-hydroxyphenyl)propan-2-yl]phenol Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(C(C)(C)C=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 QHPKIUDQDCWRKO-UHFFFAOYSA-N 0.000 description 1
- YQQQXXUABFURLN-UHFFFAOYSA-N 2,6-ditert-butyl-4-ethoxyphenol Chemical compound CCOC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 YQQQXXUABFURLN-UHFFFAOYSA-N 0.000 description 1
- GEHIXSKXGCIKJJ-UHFFFAOYSA-N 2-(chloromethyl)-5-(4-methoxyphenyl)-1,3,4-oxadiazole Chemical compound C1=CC(OC)=CC=C1C1=NN=C(CCl)O1 GEHIXSKXGCIKJJ-UHFFFAOYSA-N 0.000 description 1
- HYXVEQIONZKDIA-UHFFFAOYSA-N 2-(decyldisulfanyl)-1,3-benzoxazole Chemical compound C1=CC=C2OC(SSCCCCCCCCCC)=NC2=C1 HYXVEQIONZKDIA-UHFFFAOYSA-N 0.000 description 1
- XTYDQWTYBIZARF-UHFFFAOYSA-N 2-(decyldisulfanyl)-1h-benzimidazole Chemical compound C1=CC=C2NC(SSCCCCCCCCCC)=NC2=C1 XTYDQWTYBIZARF-UHFFFAOYSA-N 0.000 description 1
- YRQOYOWFUDLPGC-UHFFFAOYSA-N 2-(dodecyldisulfanyl)-1,3-benzoxazole Chemical compound C1=CC=C2OC(SSCCCCCCCCCCCC)=NC2=C1 YRQOYOWFUDLPGC-UHFFFAOYSA-N 0.000 description 1
- ITJODUNSZXNTOI-UHFFFAOYSA-N 2-(dodecyldisulfanyl)-1h-benzimidazole Chemical compound C1=CC=C2NC(SSCCCCCCCCCCCC)=NC2=C1 ITJODUNSZXNTOI-UHFFFAOYSA-N 0.000 description 1
- CYXWNSBYVBWROX-UHFFFAOYSA-N 2-(octyldisulfanyl)-1,3-benzothiazole Chemical compound C1=CC=C2SC(SSCCCCCCCC)=NC2=C1 CYXWNSBYVBWROX-UHFFFAOYSA-N 0.000 description 1
- LFAMMXHEBNTRPL-UHFFFAOYSA-N 2-(octyldisulfanyl)-1,3-benzoxazole Chemical compound C1=CC=C2OC(SSCCCCCCCC)=NC2=C1 LFAMMXHEBNTRPL-UHFFFAOYSA-N 0.000 description 1
- ZYLBDGBVCLZOII-UHFFFAOYSA-N 2-(octyldisulfanyl)-1h-benzimidazole Chemical compound C1=CC=C2NC(SSCCCCCCCC)=NC2=C1 ZYLBDGBVCLZOII-UHFFFAOYSA-N 0.000 description 1
- ROHFBIREHKPELA-UHFFFAOYSA-N 2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]prop-2-enoic acid;methane Chemical compound C.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O ROHFBIREHKPELA-UHFFFAOYSA-N 0.000 description 1
- CXCIRGCZPUJGMH-UHFFFAOYSA-N 2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 CXCIRGCZPUJGMH-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
- WJQOZHYUIDYNHM-UHFFFAOYSA-N 2-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC=C1O WJQOZHYUIDYNHM-UHFFFAOYSA-N 0.000 description 1
- HXIQYSLFEXIOAV-UHFFFAOYSA-N 2-tert-butyl-4-(5-tert-butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenol Chemical compound CC1=CC(O)=C(C(C)(C)C)C=C1SC1=CC(C(C)(C)C)=C(O)C=C1C HXIQYSLFEXIOAV-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
- IMOYOUMVYICGCA-UHFFFAOYSA-N 2-tert-butyl-4-hydroxyanisole Chemical compound COC1=CC=C(O)C=C1C(C)(C)C IMOYOUMVYICGCA-UHFFFAOYSA-N 0.000 description 1
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- MRBKEAMVRSLQPH-UHFFFAOYSA-N 3-tert-butyl-4-hydroxyanisole Chemical compound COC1=CC=C(O)C(C(C)(C)C)=C1 MRBKEAMVRSLQPH-UHFFFAOYSA-N 0.000 description 1
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- JHCCIUPVUCVKIJ-UHFFFAOYSA-N 4,6-ditert-butyl-2-(3,5-ditert-butyl-2,6-dihydroxyphenyl)sulfanylbenzene-1,3-diol Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=C(O)C(SC=2C(=C(C=C(C=2O)C(C)(C)C)C(C)(C)C)O)=C1O JHCCIUPVUCVKIJ-UHFFFAOYSA-N 0.000 description 1
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- LVEOKSIILWWVEO-UHFFFAOYSA-N tetradecyl 3-(3-oxo-3-tetradecoxypropyl)sulfanylpropanoate Chemical compound CCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCC LVEOKSIILWWVEO-UHFFFAOYSA-N 0.000 description 1
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- AGGKEGLBGGJEBZ-UHFFFAOYSA-N tetramethylenedisulfotetramine Chemical compound C1N(S2(=O)=O)CN3S(=O)(=O)N1CN2C3 AGGKEGLBGGJEBZ-UHFFFAOYSA-N 0.000 description 1
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- WAILXPVSJYWOEV-UHFFFAOYSA-L zinc;(2,3-didodecylphenyl)sulfanyl-dioxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCCCCCCCC1=CC=CC(SP([O-])([O-])=S)=C1CCCCCCCCCCCC WAILXPVSJYWOEV-UHFFFAOYSA-L 0.000 description 1
- OBPRGCGYBYCAIB-UHFFFAOYSA-L zinc;(2,3-dipentylphenyl)sulfanyl-dioxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCC1=CC=CC(SP([O-])([O-])=S)=C1CCCCC OBPRGCGYBYCAIB-UHFFFAOYSA-L 0.000 description 1
- NDMGGNOLFUKCSA-UHFFFAOYSA-L zinc;(2,3-dipropylphenyl)sulfanyl-dioxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCC1=CC=CC(SP([O-])([O-])=S)=C1CCC NDMGGNOLFUKCSA-UHFFFAOYSA-L 0.000 description 1
- DAIDCNOEIKGXQG-UHFFFAOYSA-L zinc;(2-methyl-3,4-dipropylphenyl)sulfanyl-dioxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCC1=CC=C(SP([O-])([O-])=S)C(C)=C1CCC DAIDCNOEIKGXQG-UHFFFAOYSA-L 0.000 description 1
- PXJZGBFRKRTOPA-UHFFFAOYSA-L zinc;[2,3-di(nonyl)phenyl]sulfanyl-dioxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCCCCC1=CC=CC(SP([O-])([O-])=S)=C1CCCCCCCCC PXJZGBFRKRTOPA-UHFFFAOYSA-L 0.000 description 1
- ZNCAMSISVWKWHL-UHFFFAOYSA-L zinc;butoxy-butylsulfanyl-oxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCOP([O-])(=S)SCCCC.CCCCOP([O-])(=S)SCCCC ZNCAMSISVWKWHL-UHFFFAOYSA-L 0.000 description 1
- BCLLIVNRSGTXBX-UHFFFAOYSA-L zinc;decoxy-decylsulfanyl-oxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCCCCCOP([O-])(=S)SCCCCCCCCCC.CCCCCCCCCCOP([O-])(=S)SCCCCCCCCCC BCLLIVNRSGTXBX-UHFFFAOYSA-L 0.000 description 1
- ZBDJNBFTEIUHPK-UHFFFAOYSA-L zinc;dihexoxy-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCOP([S-])(=S)OCCCCCC.CCCCCCOP([S-])(=S)OCCCCCC ZBDJNBFTEIUHPK-UHFFFAOYSA-L 0.000 description 1
- VYEHCXHIPZIYIJ-UHFFFAOYSA-L zinc;dodecoxy-dodecylsulfanyl-oxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCCCCCCCOP([O-])(=S)SCCCCCCCCCCCC.CCCCCCCCCCCCOP([O-])(=S)SCCCCCCCCCCCC VYEHCXHIPZIYIJ-UHFFFAOYSA-L 0.000 description 1
- GBEDXBRGRSPHRI-UHFFFAOYSA-L zinc;octoxy-octylsulfanyl-oxido-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCCCCOP([O-])(=S)SCCCCCCCC.CCCCCCCCOP([O-])(=S)SCCCCCCCC GBEDXBRGRSPHRI-UHFFFAOYSA-L 0.000 description 1
- HHMFJIHYTYQNJP-UHFFFAOYSA-L zinc;oxido-pentoxy-pentylsulfanyl-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCCCOP([O-])(=S)SCCCCC.CCCCCOP([O-])(=S)SCCCCC HHMFJIHYTYQNJP-UHFFFAOYSA-L 0.000 description 1
- LZVDFWITYZHIEU-UHFFFAOYSA-L zinc;oxido-propoxy-propylsulfanyl-sulfanylidene-$l^{5}-phosphane Chemical compound [Zn+2].CCCOP([O-])(=S)SCCC.CCCOP([O-])(=S)SCCC LZVDFWITYZHIEU-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- 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
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/12—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/022—Ethene
- C10M2205/0225—Ethene 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
-
- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/17—Fisher Tropsch reaction products
- C10M2205/173—Fisher Tropsch reaction products used as base material
-
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Description
また、エンジンオイル中の硫黄分は燃焼によって硫酸を生成し、生成した硫酸がピストンの清浄性、耐摩耗性に良くない影響を与え、またエンジンオイル中のリン分が排ガス浄化触媒を被毒することから、今後更にLOW-SAPSと呼ばれる低灰分・低リン・低硫黄のエンジンオイルを指向する傾向は強まって行くものと思われる。
また、特開2006‐176672号公報(特許文献2)のものは、低灰分による酸化安定性に優れた内燃機関用潤滑油を目的としているもので、この低灰分油で粘度および酸価の上昇を抑えようとしているが、ピストン清浄性を特に志向しているものではない。さらに、実施例における硫酸灰分も0.99〜1.01質量%と極めて多くなっている。
このため、基油にコハク酸イミドの窒素量を0.01〜0.2質量%、ジチオリン酸亜鉛の亜鉛量を0.05〜0.12質量%、アミン系酸化防止剤の窒素量を0.02〜0.3質量%及びホウ素量を0.01〜0.08質量%含有させ、また、硫酸灰分の含有量を0.3質量%以下であるようにする。
そして、上記の〔(ジチオリン酸亜鉛の亜鉛量)×(コハク酸イミドの窒素量)〕と〔(ジチオリン酸亜鉛の亜鉛量)×(アミン系酸化防止剤の窒素量)〕の合計値が0.015〜0.06であるようにする。上記合計量は好ましくは0.015〜0.04、より好ましくは0.015〜0.03である。ここでいう亜鉛量及び窒素量は質量%で表わすものである。
こうしたディーゼルエンジン用の潤滑油組成物は、サリシレート、フェネート若しくはスルホネートの金属清浄剤を含んでいないものである。ここで、金属清浄剤を含んでいないとは、金属清浄剤に由来する金属分が金属含有量換算で0.01質量%以下の潤滑油組成物であることを示す。
更に、このディーゼルエンジン用潤滑油組成物は、JASO M336:1998 清浄性試験におけるTGFが30%以下、及びJASO M354:1999 動弁摩耗試験におけるカム山高さ変化が95μm以下であるようにされている。
これらの基油の粘度は特に制限されないが、粘度指数は80〜120、好ましくは100〜120がよい。40℃における動粘度は、好ましくは2〜680mm2/s、より好ましくは8〜220mm2/sである。また全硫黄分は300ppm未満、好ましくは100ppm未満、更に好ましくは10ppm未満がよい。全窒素分も10ppm未満、好ましくは1ppm未満がよい。さらにアニリン点は80〜150℃、好ましくは100〜135℃のものを使用するのがよい。
これらグループ2基油の中でも、好ましいものとして粘度指数が115以上であるグループ2プラスと呼ばれる基油が挙げられる。
これらの基油の粘度は特に制限されないが、粘度指数は120〜160、好ましくは120〜150がよい。40℃における動粘度は、好ましくは2〜680mm2/s、より好ましくは8〜220mm2/sである。また全硫黄分は、300ppm未満、好ましくは100ppm未満、更に好ましくは10ppm未満がよい。全窒素分も10ppm未満、好ましくは1ppm未満がよい。さらにアニリン点は80〜150℃、好ましくは110〜135℃のものを使用するのがよい。
これらグループ3基油の中でも、好ましいものとして粘度指数が130以上であるグループ3プラスと呼ばれる基油が挙げられる。
これら合成基油の粘度は特に制限されないが、40℃における動粘度は、好ましくは2〜680mm2/s、より好ましくは8〜220mm2/sである。
GTL基油の粘度性状は特に制限されないが、通例、粘度指数は120〜180、好ましくは130〜175、より好ましくは140〜175である。また40℃における動粘度は2〜680mm2/s、好ましくは5〜120mm2/sである。また通例全硫黄分は10ppm未満、全窒素分1ppm未満である。そのようなGTL基油商品の一例として、SHELL XHVI(登録商標)がある。
これらのジチオリン酸亜鉛の中でも第2級のアルキル基を有するジアルキルジチオリン酸亜鉛が好ましく、炭素数としては3〜12、好ましくは3〜8、より好ましくは3〜6である。
アルケニル若しくはアルキルコハク酸イミドとしては、例えば、一般式(1)で表されるアルケニル若しくはアルキルコハク酸モノイミド及び一般式(2)で表されるアルケニル若しくはアルキルコハク酸ビスイミドが好適なものとして挙げられる。
また、上記mは1〜10の整数であるが、好ましくは2〜5、より好ましくは3〜4である。mが2を超えると良好な清浄性を有し、mが5未満であると基油に対する溶解性が良好となる。
一般式(2)において、nは0又は1〜10の整数であるが、好ましくは1〜4、より好ましくは2〜3である。nが1を超えると良好な清浄性を有し、nが4未満であると基油に対する溶解性が良好となる。
また、好適なアルキル基の代表例としては、ポリブテニル基又はポリイソブテニル基を水素添加したものである。
上記のコハク酸モノイミド及びコハク酸ビスイミドは、アルケニルコハク酸無水物若しくはアルキルコハク酸無水物とポリアミンとの反応比率を変えることによって製造することができる。
上記ポリオレフィンを形成するオレフィン単量体としては、炭素数2〜8のα−オレフィンの一種又は二種以上を混合して用いることができるが、イソブテンと1−ブテンの混合物を好適に用いることができる。
アルケニル若しくはアルキルコハク酸モノイミドあるいはビスイミド及び/又はそのホウ素変性した誘導体の含有量が、窒素含有量換算で0.01質量%未満であると、無灰分散剤としての効果が充分に発揮されず、また、0.2質量%を超えると、エンジンに使用されているシール材などのゴム製部品への悪影響が顕著となるので好ましくない。
上記アルケニル若しくはアルキルコハク酸モノイミド又はビスイミド及び/又はそのホウ素変性した誘導体のホウ素換算した潤滑油組成物中の含有量が0.01質量%未満では耐摩耗性および高温清浄性の向上効果が不十分であり、0.08質量%を超えても、これらの効果は飽和しており経済性が低下する。
また、ホウ素はコハク酸イミドのホウ素変性物に由来するものであるが、ホウ素分だけを過剰に添加することは、組成物の硫酸灰分を増加させることになり、DPFの目詰まりの原因となり好ましくない。
アミン系酸化防止剤は、構造的にも、表面吸着しやすく、耐摩耗剤のジチオリン酸亜鉛が分解して、酸性中間体が表面に吸着するのを阻害するため、過剰添加は好ましくないことから、その上限量を規制した方がよい。
アミン系酸化防止剤としては、p,p’−ジオクチル−ジフェニルアミン(精工化学社製:ノンフレックスOD−3)、p,p’−ジ−α−メチルベンジル−ジフェニルアミン、N−p−ブチルフェニル−N−p’−オクチルフェニルアミンなどのジアルキル−ジフェニルアミン類、モノ−t−ブチルジフェニルアミン、モノオクチルジフェニルアミンなどのモノアルキルジフェニルアミン類、ジ(2,4−ジエチルフェニル)アミン、ジ(2−エチル−4−ノニルフェニル)アミンなどのビス(ジアルキルフェニル)アミン類、オクチルフェニル−1−ナフチルアミン、N−t−ドデシルフェニル−1−ナフチルアミンなどのアルキルフェニル−1−ナフチルアミン類、1−ナフチルアミン、フェニル−1−ナフチルアミン、フェニル−2−ナフチルアミン、N−ヘキシルフェニル−2−ナフチルアミン、N−オクチルフェニル−2−ナフチルアミンなどのアリール−ナフチルアミン類、N,N’−ジイソプロピル−p−フェニレンジアミン、N,N’−ジフェニル−p−フェニレンジアミンなどのフェニレンジアミン類、フェノチアジン(保土谷化学社製:Phenothiazine)、3,7−ジオクチルフェノチアジンなどのフェノチアジン類などが挙げられる。
硫黄系酸化防止剤としては、ジドデシルサルファイド、ジオクタデシルサルファイドなどのジアルキルサルファイド類、ジドデシルチオジプロピオネート、ジオクタデシルチオジプロピオネート、ジミリスチルチオジプロピオネート、ドデシルオクタデシルチオジプロピオネートなどのチオジプロピオン酸エステル類、2−メルカプトベンゾイミダゾールなどが挙げられる。
これらの金属不活性剤は、潤滑油組成物中に約0.01〜0.5質量%の範囲で単独又は複数組み合わせて使用できる。
粘度指数向上剤としては、例えばポリメタクリレート類やエチレン−プロピレン共重合体、スチレン−ブタジエン系などのスチレン−ジエン共重合体、ポリイソブチレン、ポリスチレンなどのオレフィンポリマー類等の非分散型粘度指数向上剤や、これらに含窒素モノマーを共重合させた分散型粘度指数向上剤等が挙げられる。その添加量は、潤滑油組成物中に約0.05〜20質量%の範囲で使用できる。
流動点降下剤としては、例えばポリメタクリレート系のポリマーが挙げられる。その添加量は、潤滑油組成物中に約0.01〜5質量%の範囲で使用できる。本発明の実施例では、ポリメタクリレート系の流動点降下剤を配合している。
実施例及び比較例の調製にあたり、下記の組成材料を用意した。
1.基油
(1-1)基油A:フィッシャー・トロプシュ由来基油(XHVI5.2)〔性状:100℃の動粘度が5.2mm2/s、粘度指数が140、硫黄分量が10質量ppm以下〕
(1-2)基油B:フィッシャー・トロプシュ由来基油(XHVI8.2)〔性状:100℃の動粘度が8.2mm2/s、粘度指数が144、硫黄分量が10質量ppm以下〕
(1-3)基油C:エチレンとα−オレフィンとのコオリゴマー(ルーカントHC40)〔性状:100℃の動粘度が40mm2/s、粘度指数が155、硫黄分量が10質量ppm以下〕
(2-1)ZnDTP−1:炭素数3〜6の2級アルキル基を有するジアルキルジチオリン酸亜鉛〔成分(元素分析値):Znが11.1質量%、Pが10.0質量%、Sが21
質量%〕
(2-2)ZnDTP−2:炭素数4〜6の2級アルキル基を有するジアルキルジチオリン酸亜鉛〔成分(元素分析値):Znが7.7質量%、Pが7.2質量%、Sが15質量%〕
3.無灰分散剤
(3-1)コハク酸イミド−1:ホウ素変性ポリブテニルコハク酸イミド(モノ)〔成分(元素分析値):Nが2.2質量%、Bが1.96質量%〕
(3-2)コハク酸イミド−2:ポリブテニルコハク酸イミド(ビス)〔成分(元素分析値):Nが1.2質量%〕
(3-3)コハク酸イミド−3:ホウ素変性ポリブテニルコハク酸イミド(ビス)〔成分(元素分析値):Nが1.5質量%、Bが0.47質量%〕
(4-1)酸化防止剤−1:アミン系酸化防止剤(イルガノックスL57)〔成分:窒素分が4.5質量%)
(4-2)酸化防止剤−2:ヒンダードフェノール系酸化防止剤(イルガノックスL135)
5.金属不活性剤: ベンゾトリアゾール誘導体(イルガメット39)
6.粘度指数向上剤: スチレン・ブタジエン系粘度指数向上剤
7.流動点降下剤: ポリメタクリレート系流動点降下剤
8.消泡剤: ポリジメチルシロキサン系消泡剤
表1及び表2に示す配合割合で組成材料を混合し、ディーゼルエンジンオイル用潤滑油組成物を得た。
実施例1〜4及び比較例1〜6について、その特性を比較するために下記の試験を行った。
(1)パラメーターの算出
〔(ジアルキルジチオリン酸亜鉛の亜鉛量)×(ポリブテニルコハク酸イミドの窒素量)〕と〔(ジアルキルジチオリン酸亜鉛の亜鉛量)×(アミン系酸化防止剤の窒素量)〕の合計値であって、ここでいう亜鉛量及び窒素量は質量%で表わすものである。
評価基準:0.015〜0.06・・・・可
0.015未満・・・・不可
この評価基準において0.015〜0.06の場合は下記するTGF値もカム山高さ変化も少なく、好ましい結果を得ることができることになるが、0.015未満では、TGFが30%を超えるか、あるいはカム山高さ変化が95μmを超えるため好ましくない。0.06を超える場合は経済性の点で好ましくない。
日本独自のディーゼルエンジンオイルの規格および試験方法として制定されたJASO M355規格に採用されている、ディーゼルエンジンのピストン清浄性試験であるJASO M336:1998(TD25エンジンを使用)によりピストン清浄性の評価を行った。TGF〔Top Groove Fill(第1リング溝カーボン詰まり)〕値は容積%で表示される。
評価基準: TGF 30%以下・・・・可
TGF 30%超・・・・・不可
(3)動弁系の摩耗試験
JASO M354:1999(4D34T4エンジンを使用)による動弁系の摩耗性試験を行った。
評価基準:カム山の高さ変化 95μm以下・・・・可
95μm超・・・・・不可
カム山の高さ変化(減少量)の限界値は、JASOのDH−2の合格基準に準拠したが、ここで使用したカム山の高さ変化は、実測値を使用し、JASO M355で定めているカム山高さ変化の補正は行っていない。
実施例1〜4及び比較例1〜6についての試験結果を、表1及び表2に示す。
実施例1のものは、金属清浄剤を含有せず、コハク酸イミド−3の分散剤を窒素量で0.15質量%、アミン系酸化防止剤を窒素量で0.08質量%、コハク酸イミド系分散剤のホウ素量を0.047質量%に対して、ZnDTPをZn量で0.10質量%含み、(ZnDTPの亜鉛量)×(コハク酸イミドの窒素量+アミン系酸化防止剤の窒素量)のパラメータ値が0.023、TGFは12%、またカム山高さの変化は7μm、さらに硫酸灰分も0.23質量%と基準に収まり、良好な性能が得られている。
実施例2のものは、金属清浄剤を使用せず、主としてコハク酸イミド−1、コハク酸イミド−2とコハク酸イミド−3を混合して合計窒素量を0.12質量%にしたもので、パラメータ値は0.020、TGFは25%、またカム山高さの変化は18μmとなり、良好な性能が得られている。
実施例3は、コハク酸イミド−1とコハク酸イミド−2の混合としてコハク酸イミドの窒素量は0.15質量%とし、ZnDTPをZn量で0.1質量%、アミン系酸化防止剤を窒素量で0.0396質量%で、パラメータ値は0.019となり、TGFは9%、カム山高さの変化は24.7μmであった。
実施例4は、アミン系酸化防止剤を窒素量で0.022質量%にし、パラメータ値は0.015、TGFは7%、カム山高さの変化は84.9μmと、良好な範囲内であった。
比較例3は、ZnDTPをZn量で0.05質量%、コハク酸イミドを窒素量で0.10質量%、アミン系酸化防止剤を窒素量で0.0792質量%としたところ、パラメータ値は0.009と基準値以下となり、TGFは55%、カム山高さの変化は300μmとさらに悪化した。比較例4では、ZnDTPをZn量で0.06質量%、コハク酸イミドを窒素量で0.15質量%、アミン系酸化防止剤を窒素量で0.0396質量%にしたところ、パラメータ値が0.011になり、TGFは14%と良好であったが、カム山高さの変化は130.7μmと95μmを超えてしまった。
比較例5は、ZnDTPをZn量で0.07%とし、コハク酸イミドを窒素量で0.12質量%としたところ、パラメータ値は0.011となり、TGFは24%で基準を満たしたが、カム山高さの変化が235.6μmと大幅に増加した。比較例6は、実施例1と同じコハク酸イミド−3を同量にして、ZnDTPをZn量で0.07質量%にし、さらにアミン系酸化防止剤を窒素量で0.0396質量%にしたもので、パラメータ値は0.013となり、TGFの11%は適合しているものの、カム山高さの変化は99μmとなって基準値である95μmをわずかに超えるものとなった。
Claims (4)
- 基油中に、硫酸灰分を0.3質量%以下、コハク酸イミドの窒素量を0.01〜0.2質量%、ジチオリン酸亜鉛の亜鉛量を0.05〜0.12質量%、アミン系酸化防止剤の窒素量を0.02〜0.3質量%及びホウ素量を0.01〜0.08質量%含有し、かつ、上記の〔(ジチオリン酸亜鉛の亜鉛量)×(コハク酸イミドの窒素量)〕と〔(ジチオリン酸亜鉛の亜鉛量)×(アミン系酸化防止剤の窒素量)〕の合計値が0.015〜0.06である、サリシレート、フェネート若しくはスルホネートの金属清浄剤を含まないディーゼルエンジン用潤滑油組成物。
- 上記基油が、API基油カテゴリーのグループ2、グループ3、グループ4およびグループ5から選ばれる単独または混合基油であり、この基油の硫黄分が50ppm以下である請求項1に記載のディーゼルエンジン用潤滑油組成物。
- JASO M336:1998 清浄性試験におけるTGFが30%以下、及びJASO
M354:1999 動弁摩耗試験におけるカム山高さの変化が95μm以下である請求項1または2に記載のディーゼルエンジン用潤滑油組成物。 - 上記ジチオリン酸亜鉛が2級のアルキル基を有するジアルキルジチオリン酸亜鉛であって、各アルキル基の炭素数が3〜12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ディーゼルエンジン用潤滑油組成物。
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