JP2021524534A - 潤滑組成物 - Google Patents
潤滑組成物 Download PDFInfo
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- JP2021524534A JP2021524534A JP2021500871A JP2021500871A JP2021524534A JP 2021524534 A JP2021524534 A JP 2021524534A JP 2021500871 A JP2021500871 A JP 2021500871A JP 2021500871 A JP2021500871 A JP 2021500871A JP 2021524534 A JP2021524534 A JP 2021524534A
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- base oil
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- 239000000203 mixture Substances 0.000 title claims abstract description 122
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 85
- 239000002199 base oil Substances 0.000 claims abstract description 191
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 46
- 239000011707 mineral Substances 0.000 claims abstract description 46
- 239000000654 additive Substances 0.000 claims abstract description 19
- 125000003118 aryl group Chemical group 0.000 claims abstract description 13
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 11
- 239000011593 sulfur Substances 0.000 claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000008186 active pharmaceutical agent Substances 0.000 claims abstract 17
- 239000003963 antioxidant agent Substances 0.000 claims description 19
- 150000001412 amines Chemical class 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 17
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- 125000004432 carbon atom Chemical group C* 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 13
- 230000003749 cleanliness Effects 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 description 10
- 239000010705 motor oil Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 9
- 238000009472 formulation Methods 0.000 description 9
- 239000013049 sediment Substances 0.000 description 8
- 239000002585 base Substances 0.000 description 7
- 239000002270 dispersing agent Substances 0.000 description 7
- 241001596784 Pegasus Species 0.000 description 6
- -1 borate ester Chemical class 0.000 description 6
- 239000012459 cleaning agent Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920013639 polyalphaolefin Polymers 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000007655 standard test method Methods 0.000 description 3
- 239000004034 viscosity adjusting agent Substances 0.000 description 3
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical compound CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 125000002877 alkyl aryl group Chemical group 0.000 description 2
- 239000007866 anti-wear additive Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- NGHTXZCKLWZPGK-UHFFFAOYSA-N nefiracetam Chemical compound CC1=CC=CC(C)=C1NC(=O)CN1C(=O)CCC1 NGHTXZCKLWZPGK-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920001515 polyalkylene glycol Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920000193 polymethacrylate Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- OIWIYLWZIIJNHU-UHFFFAOYSA-N 1-sulfanylpyrazole Chemical compound SN1C=CC=N1 OIWIYLWZIIJNHU-UHFFFAOYSA-N 0.000 description 1
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 1
- 239000005069 Extreme pressure additive Substances 0.000 description 1
- 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 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- XYRMLECORMNZEY-UHFFFAOYSA-B [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S Chemical class [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S XYRMLECORMNZEY-UHFFFAOYSA-B 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 125000001183 hydrocarbyl group Chemical group 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- KHYKFSXXGRUKRE-UHFFFAOYSA-J molybdenum(4+) tetracarbamodithioate Chemical compound C(N)([S-])=S.[Mo+4].C(N)([S-])=S.C(N)([S-])=S.C(N)([S-])=S KHYKFSXXGRUKRE-UHFFFAOYSA-J 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 208000019585 progressive encephalomyelitis with rigidity and myoclonus Diseases 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- PTISTKLWEJDJID-UHFFFAOYSA-N sulfanylidenemolybdenum Chemical class [Mo]=S PTISTKLWEJDJID-UHFFFAOYSA-N 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical class [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
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
- 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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- 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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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
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- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
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- 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
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- 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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- 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
- C10M2203/108—Residual fractions, e.g. bright stocks
- C10M2203/1085—Residual fractions, e.g. bright stocks used as base material
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- 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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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/26—Amines
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/02—Viscosity; Viscosity index
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
- C10N2030/43—Sulfur free or low sulfur content compositions
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
- C10N2030/45—Ash-less or low ash content
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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/52—Base number [TBN]
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- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
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- Oil, Petroleum & Natural Gas (AREA)
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Lubricants (AREA)
Abstract
Description
潤滑組成物の重量で少なくとも0.4重量%および最大で1.0重量%の硫酸灰分(ASTM D 874に準拠)と、
少なくとも4.0mgKOH/gおよび最大で15mgKOH/g、好ましくは6.0mgKOH/g〜12mgKOH/gの全塩基価(TBN)値(ASTM D2896に準拠)と、
潤滑組成物の重量で1重量%〜20重量%、好ましくは3重量%〜15重量%の範囲の基油によってもたらされる全芳香族含量と、
潤滑組成物の重量で0.4重量%以下の基油によってもたらされる硫黄含量(ASTM D5453に準拠して測定したとき)と、を有し、
基油は、(i)APIグループI鉱物基油およびAPIグループII鉱物基油、ならびにこれらの混合物から選択される鉱物基油である第1の基油と、(ii)APIグループII基油およびAPIグループIII基油から選択される第2の基油と、のブレンドを含み、好ましくは、第1の基油は、第2の基油のものとは異なるAPIグループに属する。
好ましい実施形態では、R1およびR3は、ヒドロカルビル基である。したがって、R3は、好ましくは、ヒドロカルビル型のアルキルまたはアルカリル基である。
改善された酸化安定性(特にIP48/97(2004)試験に準拠)、および/または
改善された堆積物制御(特にPCT試験またはTEOST MHT試験(ASTM D7097−09)に準拠)、および/または
改善された清浄度(特にPCT試験またはTEOST MHT試験(ASTM D7097−09)に準拠)を提供するために、特にガスエンジンにおいて、本発明による潤滑組成物の使用を提供する。
(i)熱酸化エンジンオイルシミュレーション試験による適度に高温のピストン堆積物を判定するための標準試験方法−「TEOST MHT」試験(ASTM D7097−09に準拠)、
(ii)潤滑油の酸化特性を判定するための標準試験方法(IP48/97(2004)に準拠)、(iii)次の試験条件を使用してピストン堆積物を測定するためのパネルコーカー試験(PCT ISP法または「PCT」試験)(GFC Lu−29−A−15およびPSA 01563_10_00802に基づく方法):試験温度:288℃;試験期間:24時間;オイルフロー1ml/分;エアフロー:12l/h;評価に使用した試験結果:メリット−合計:0〜10(高いほど良い)。
表1および表2の結果から分かるように、本発明による潤滑組成物は、改善された堆積制御および改善された酸化安定性特性を示した。
Claims (14)
- 基油および1つ以上の添加剤を含む潤滑組成物であって、前記組成物が、
前記潤滑組成物の重量で少なくとも0.4重量%および最大で1.0重量%の硫酸灰分(ASTM D 874に準拠)と、
少なくとも4.0mgKOH/gおよび最大で12mgKOH/gの全塩基数(TBN)値(ASTM D 2896に準拠)と、
前記潤滑組成物の重量で1重量%〜20重量%の範囲の前記基油によってもたらされる全芳香族含量と、
前記潤滑組成物の重量で0.4重量%以下の前記基油によってもたらされる硫黄含量と、を有し、
前記基油は、(i)APIグループI鉱物基油およびAPIグループII鉱物基油、ならびにこれらの混合物から選択される鉱物基油である第1の基油と、(ii)APIグループII基油およびAPIグループIII基油から選択される第2の基油と、のブレンドを含む、潤滑組成物。 - 前記第1の基油が、前記第2の基油のものとは異なるAPIグループに属する、請求項1に記載の潤滑組成物。
- 前記第1の基油が、APIグループI鉱物基油である、請求項1または2に記載の潤滑組成物。
- 前記APIグループI鉱物基油が、前記潤滑組成物の重量で5重量%〜40重量%のレベルで存在する、請求項1〜3のいずれかに記載の潤滑組成物。
- 前記第2の基油が、APIグループII基油である、請求項1〜4のいずれかに記載の潤滑組成物。
- 前記第2の基油がAPIグループII鉱物基油である、請求項1〜5のいずれかに記載の潤滑組成物。
- 前記APIグループII基油が、前記潤滑組成物の重量で50重量%以上のレベルで存在する、請求項5または6に記載の潤滑組成物。
- 前記APIグループI鉱物基油が、ブライトストックである、請求項2〜7のいずれかに記載の潤滑組成物。
- 前記APIグループI鉱物基油の粘度が、100℃で8mm2/秒以上である、請求項2〜8のいずれかに記載の潤滑組成物。
- 前記潤滑組成物が、アミン系酸化防止剤を含む、請求項1〜9のいずれかに記載の潤滑組成物。
- 前記アミン系酸化防止剤が、前記潤滑組成物の重量で1重量%〜5重量%、好ましくは1〜4重量%、より好ましくは1.5〜3.0重量%のレベルで存在する、請求項10に記載の潤滑組成物。
- 式中、R2およびR3が、4〜50個の炭素原子、好ましくは6〜40個の炭素原子、より好ましくは8〜30個の炭素原子を有するアルキル基から選択される、請求項12に記載の潤滑組成物。
- 特にガスエンジンにおける、請求項1〜13のいずれか一項に記載の潤滑組成物の使用であって、
改善された酸化安定性(特にIP48/97(2004)試験に準拠、および/または
改善された堆積物制御(特にPCT試験またはTEOST MHT試験(ASTM D7097−09)に準拠)、および/または
改善された清浄度(特にPCT試験またはTEOST MHT試験(ASTM D7097−09)に準拠)、を提供するための使用。
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