EP4127118B1 - Water-glycol hydraulic fluid composition and supplementary additive therefor - Google Patents
Water-glycol hydraulic fluid composition and supplementary additive therefor Download PDFInfo
- Publication number
- EP4127118B1 EP4127118B1 EP21716197.5A EP21716197A EP4127118B1 EP 4127118 B1 EP4127118 B1 EP 4127118B1 EP 21716197 A EP21716197 A EP 21716197A EP 4127118 B1 EP4127118 B1 EP 4127118B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- mass
- glycol
- hydraulic fluid
- alkanolamine
- 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.)
- Active
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- 239000012530 fluid Substances 0.000 title claims description 53
- 239000000654 additive Substances 0.000 title claims description 27
- 230000000996 additive effect Effects 0.000 title claims description 15
- 239000000203 mixture Substances 0.000 title claims description 15
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 43
- 150000001875 compounds Chemical class 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 24
- 239000000194 fatty acid Substances 0.000 claims description 24
- 229930195729 fatty acid Natural products 0.000 claims description 24
- 239000003513 alkali Substances 0.000 claims description 22
- 150000004665 fatty acids Chemical class 0.000 claims description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims description 20
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 20
- -1 hydroxide compound Chemical class 0.000 claims description 19
- 239000000314 lubricant Substances 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- IWSZDQRGNFLMJS-UHFFFAOYSA-N 2-(dibutylamino)ethanol Chemical compound CCCCN(CCO)CCCC IWSZDQRGNFLMJS-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 26
- 230000002265 prevention Effects 0.000 description 17
- 238000012360 testing method Methods 0.000 description 17
- 239000012808 vapor phase Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 11
- 239000002562 thickening agent Substances 0.000 description 11
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 9
- 238000009835 boiling Methods 0.000 description 6
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 5
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 5
- 239000003112 inhibitor Substances 0.000 description 5
- AKNUHUCEWALCOI-UHFFFAOYSA-N N-ethyldiethanolamine Chemical compound OCCN(CC)CCO AKNUHUCEWALCOI-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000002199 base oil Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- WQEPLUUGTLDZJY-UHFFFAOYSA-N pentadecanoic acid Chemical compound CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 3
- PZOIEPPCQPZUAP-UHFFFAOYSA-N 1-aminohexan-2-ol Chemical compound CCCCC(O)CN PZOIEPPCQPZUAP-UHFFFAOYSA-N 0.000 description 2
- MIJDSYMOBYNHOT-UHFFFAOYSA-N 2-(ethylamino)ethanol Chemical compound CCNCCO MIJDSYMOBYNHOT-UHFFFAOYSA-N 0.000 description 2
- BFSVOASYOCHEOV-UHFFFAOYSA-N 2-diethylaminoethanol Chemical compound CCN(CC)CCO BFSVOASYOCHEOV-UHFFFAOYSA-N 0.000 description 2
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 239000005639 Lauric acid Substances 0.000 description 2
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical compound CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- KEMQGTRYUADPNZ-UHFFFAOYSA-N heptadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(O)=O KEMQGTRYUADPNZ-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229940083542 sodium Drugs 0.000 description 2
- SZHOJFHSIKHZHA-UHFFFAOYSA-N tridecanoic acid Chemical compound CCCCCCCCCCCCC(O)=O SZHOJFHSIKHZHA-UHFFFAOYSA-N 0.000 description 2
- ZDPHROOEEOARMN-UHFFFAOYSA-N undecanoic acid Chemical compound CCCCCCCCCCC(O)=O ZDPHROOEEOARMN-UHFFFAOYSA-N 0.000 description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- HDPHOCRGDDLWQQ-UHFFFAOYSA-N 1,1-diaminobutan-1-ol Chemical compound CCCC(N)(N)O HDPHOCRGDDLWQQ-UHFFFAOYSA-N 0.000 description 1
- IEFAIAJPRUURNH-UHFFFAOYSA-N 1-(dibutylamino)butan-1-ol Chemical compound CCCCN(CCCC)C(O)CCC IEFAIAJPRUURNH-UHFFFAOYSA-N 0.000 description 1
- NNIKRRBLVAYGJU-UHFFFAOYSA-N 1-(dibutylamino)propan-1-ol Chemical compound CCCCN(C(O)CC)CCCC NNIKRRBLVAYGJU-UHFFFAOYSA-N 0.000 description 1
- AZZDBAMLOMKUQR-UHFFFAOYSA-N 1-(diethylamino)butan-1-ol Chemical compound CCCC(O)N(CC)CC AZZDBAMLOMKUQR-UHFFFAOYSA-N 0.000 description 1
- VKKTUDKKYOOLGG-UHFFFAOYSA-N 1-(diethylamino)propan-1-ol Chemical compound CCC(O)N(CC)CC VKKTUDKKYOOLGG-UHFFFAOYSA-N 0.000 description 1
- FVTPTPQPCQXPAX-UHFFFAOYSA-N 1-(dihexylamino)ethanol Chemical compound CCCCCCN(C(C)O)CCCCCC FVTPTPQPCQXPAX-UHFFFAOYSA-N 0.000 description 1
- GXTSZPVVJPLHBV-UHFFFAOYSA-N 1-(dihexylamino)propan-1-ol Chemical compound CCCCCCN(C(O)CC)CCCCCC GXTSZPVVJPLHBV-UHFFFAOYSA-N 0.000 description 1
- RPPCFYFWGVIQFS-UHFFFAOYSA-N 1-(dimethylamino)butan-1-ol Chemical compound CCCC(O)N(C)C RPPCFYFWGVIQFS-UHFFFAOYSA-N 0.000 description 1
- OMIPWIIZMXHRSE-UHFFFAOYSA-N 1-(dioctylamino)butan-1-ol Chemical compound C(CCCCCCC)N(CCCCCCCC)C(CCC)O OMIPWIIZMXHRSE-UHFFFAOYSA-N 0.000 description 1
- JQNHZEBWGSZPTB-UHFFFAOYSA-N 1-(dioctylamino)ethanol Chemical compound CCCCCCCCN(C(C)O)CCCCCCCC JQNHZEBWGSZPTB-UHFFFAOYSA-N 0.000 description 1
- DPEJITMORSKMKY-UHFFFAOYSA-N 1-(dioctylamino)propan-1-ol Chemical compound CCCCCCCCN(C(O)CC)CCCCCCCC DPEJITMORSKMKY-UHFFFAOYSA-N 0.000 description 1
- VUQFBJNJTIGPQC-UHFFFAOYSA-N 1-(dipentylamino)butan-1-ol Chemical compound CCCCCN(C(O)CCC)CCCCC VUQFBJNJTIGPQC-UHFFFAOYSA-N 0.000 description 1
- SGNFHOYDIMPWDR-UHFFFAOYSA-N 1-(dipentylamino)ethanol Chemical compound CCCCCN(C(C)O)CCCCC SGNFHOYDIMPWDR-UHFFFAOYSA-N 0.000 description 1
- VMJNGAHGZITNQH-UHFFFAOYSA-N 1-(dipentylamino)propan-1-ol Chemical compound CCCCCN(C(O)CC)CCCCC VMJNGAHGZITNQH-UHFFFAOYSA-N 0.000 description 1
- OHESVEGYIIHYPU-UHFFFAOYSA-N 1-(dipropylamino)butan-1-ol Chemical compound CCCC(O)N(CCC)CCC OHESVEGYIIHYPU-UHFFFAOYSA-N 0.000 description 1
- COKMLVOGWBEPNX-UHFFFAOYSA-N 1-(dipropylamino)ethanol Chemical compound CCCN(C(C)O)CCC COKMLVOGWBEPNX-UHFFFAOYSA-N 0.000 description 1
- XEHUWMGUPPPJFE-UHFFFAOYSA-N 1-(dipropylamino)propan-1-ol Chemical compound CCCN(CCC)C(O)CC XEHUWMGUPPPJFE-UHFFFAOYSA-N 0.000 description 1
- GVZZKDQFBKHYHC-UHFFFAOYSA-N 1-[butyl(heptyl)amino]ethanol Chemical compound C(CCC)N(CCCCCCC)C(C)O GVZZKDQFBKHYHC-UHFFFAOYSA-N 0.000 description 1
- SJKFIWZFLCBYOL-UHFFFAOYSA-N 1-[butyl(heptyl)amino]propan-1-ol Chemical compound C(CCC)N(CCCCCCC)C(CC)O SJKFIWZFLCBYOL-UHFFFAOYSA-N 0.000 description 1
- DPYAMCKUTZKNAW-UHFFFAOYSA-N 1-[butyl(hexyl)amino]ethanol Chemical compound C(CCC)N(CCCCCC)C(C)O DPYAMCKUTZKNAW-UHFFFAOYSA-N 0.000 description 1
- RECZNJLARPPRFR-UHFFFAOYSA-N 1-[butyl(hexyl)amino]propan-1-ol Chemical compound CCCCCCN(CCCC)C(CC)O RECZNJLARPPRFR-UHFFFAOYSA-N 0.000 description 1
- AAPXSGQRWRBVNW-UHFFFAOYSA-N 1-[butyl(pentyl)amino]ethanol Chemical compound C(CCC)N(CCCCC)C(C)O AAPXSGQRWRBVNW-UHFFFAOYSA-N 0.000 description 1
- WCKDLRCIHONXNS-UHFFFAOYSA-N 1-[butyl(pentyl)amino]propan-1-ol Chemical compound C(CCC)N(CCCCC)C(CC)O WCKDLRCIHONXNS-UHFFFAOYSA-N 0.000 description 1
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- PYSGFFTXMUWEOT-UHFFFAOYSA-N 3-(dimethylamino)propan-1-ol Chemical compound CN(C)CCCO PYSGFFTXMUWEOT-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 239000004135 Bone phosphate Substances 0.000 description 1
- AXKVFIBORCZYFI-UHFFFAOYSA-N C(CCCCCC)N(CCCCCCC)C(C)O Chemical compound C(CCCCCC)N(CCCCCCC)C(C)O AXKVFIBORCZYFI-UHFFFAOYSA-N 0.000 description 1
- PIYHKNFBOJAHST-UHFFFAOYSA-N CCCCCCCN(CCCCCCC)C(O)CC Chemical compound CCCCCCCN(CCCCCCC)C(O)CC PIYHKNFBOJAHST-UHFFFAOYSA-N 0.000 description 1
- CHGDRQBGDFTOOU-UHFFFAOYSA-N CCCCCCCN(CCCCCCC)C(O)CCC Chemical compound CCCCCCCN(CCCCCCC)C(O)CCC CHGDRQBGDFTOOU-UHFFFAOYSA-N 0.000 description 1
- JMARBDHFQWRZIZ-UHFFFAOYSA-N CCCCCCN(CCCCCC)C(O)CCC Chemical compound CCCCCCN(CCCCCC)C(O)CCC JMARBDHFQWRZIZ-UHFFFAOYSA-N 0.000 description 1
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- 239000003568 Sodium, potassium and calcium salts of fatty acids Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000006471 dimerization reaction Methods 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- KEMQGTRYUADPNZ-UHFFFAOYSA-M margarate Chemical compound CCCCCCCCCCCCCCCCC([O-])=O KEMQGTRYUADPNZ-UHFFFAOYSA-M 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 description 1
- 229940082004 sodium laurate Drugs 0.000 description 1
- 229940045845 sodium myristate Drugs 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 229940045870 sodium palmitate Drugs 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 235000013875 sodium salts of fatty acid Nutrition 0.000 description 1
- WYPBVHPKMJYUEO-NBTZWHCOSA-M sodium;(9z,12z)-octadeca-9,12-dienoate Chemical compound [Na+].CCCCC\C=C/C\C=C/CCCCCCCC([O-])=O WYPBVHPKMJYUEO-NBTZWHCOSA-M 0.000 description 1
- UNZSHUCNBUBSGW-IFNWOZJISA-M sodium;(9z,12z,15z)-octadeca-9,12,15-trienoate Chemical compound [Na+].CC\C=C/C\C=C/C\C=C/CCCCCCCC([O-])=O UNZSHUCNBUBSGW-IFNWOZJISA-M 0.000 description 1
- FIWQZURFGYXCEO-UHFFFAOYSA-M sodium;decanoate Chemical compound [Na+].CCCCCCCCCC([O-])=O FIWQZURFGYXCEO-UHFFFAOYSA-M 0.000 description 1
- GGXKEBACDBNFAF-UHFFFAOYSA-M sodium;hexadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCC([O-])=O GGXKEBACDBNFAF-UHFFFAOYSA-M 0.000 description 1
- DLJKLUIGOGBWRW-UHFFFAOYSA-M sodium;pentadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCC([O-])=O DLJKLUIGOGBWRW-UHFFFAOYSA-M 0.000 description 1
- JUQGWKYSEXPRGL-UHFFFAOYSA-M sodium;tetradecanoate Chemical compound [Na+].CCCCCCCCCCCCCC([O-])=O JUQGWKYSEXPRGL-UHFFFAOYSA-M 0.000 description 1
- DKYPZNSPQXLRRQ-UHFFFAOYSA-M sodium;undec-10-enoate Chemical compound [Na+].[O-]C(=O)CCCCCCCCC=C DKYPZNSPQXLRRQ-UHFFFAOYSA-M 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000010723 turbine oil Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 235000019871 vegetable fat Nutrition 0.000 description 1
- 229920003169 water-soluble polymer Polymers 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
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- 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
- C10M173/00—Lubricating compositions containing more than 10% water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/10—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M105/14—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms polyhydroxy
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
- C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
- C10M105/22—Carboxylic acids or their salts
- C10M105/24—Carboxylic acids or their salts having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
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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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/10—Metal oxides, hydroxides, carbonates or bicarbonates
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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
- 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
- C10M133/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M133/08—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups
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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
- 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
- C10M141/06—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 nitrogen-containing compound
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
- C10M2207/0225—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/26—Amines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
Definitions
- the present invention relates to a water-glycol hydraulic fluid composition and a supplementary additive therefor.
- the hydraulic fluid is used as a medium for transmitting power in hydraulic equipment.
- Petroleum-based hydraulic fluids are widely used, and commonly used general hydraulic fluids use a mineral oil-based base oil such as a highly refined paraffinbased base oil.
- a water-glycol hydraulic fluid is used as the hydraulic fluid in this equipment instead of a hydraulic fluid using a mineral oil as a base oil.
- rust prevention is required so that hydraulic operations can be performed smoothly and the service life of hydraulic equipment can be extended.
- a volatile, alkaline rust inhibitor must be added so that wall surfaces and ceiling surfaces not in contact with the hydraulic fluid do not rust.
- water-glycol hydraulic fluids have excellent performance, their performance deteriorates during use due to a drop in pH and oxidation.
- water-based hydraulic fluid compositions obtained by, for example, adding a polyoxyalkylene glycol diether compound having a specific structure, a polyoxyalkylene glycol monoether compound, a polyoxypropylene glycol monoether compound, and a fatty acid salt to water are used to improve performance in terms of pH drop suppression and oxidation stability, for example in JP 3233490 B2 .
- WO 2009/012058 A2 discloses a substantially morpholine free water-hydraulic liquid composition, the liquid composition comprising water, a glycol, a polyglycol, an aliphatic carboxylic acid that contains from six to 14 carbon atoms, and a combination of amines and alkanolamines.
- Water-glycol hydraulic fluids contain water and glycol as main components, but a phenomenon occurs in hydraulic equipment using these hydraulic fluids in which the water of these hydraulic fluids is vaporized during use.
- a liquid phase or vapor phase rust inhibitor is generally used as an additive in a water-glycol hydraulic fluid, but this additive is vaporized along with the water during use and so the properties of the water-glycol hydraulic fluid may exceed their appropriate range.
- the present invention provides a water-glycol hydraulic fluid containing 20-60% by mass water and 20-60% by mass glycol, with the remainder being, for example, a fatty acid-based lubricant, alkaline hydroxide compound, thickener, anticorrosive, and antifoaming agent to bring the total to 100% by mass.
- a fatty acid-based lubricant for example, alkaline hydroxide compound, thickener, anticorrosive, and antifoaming agent to bring the total to 100% by mass.
- an alkanolamine compound represented by the general formula below is blended into a water-glycol hydraulic fluid.
- R 1 and R 2 are hydrocarbon groups having from 1 to 8 carbon atoms
- R 3 is a hydrocarbon group having 2 or more carbon atoms.
- This alkanolamine compound is also used as a supplementary additive in a water-glycol hydraulic fluid.
- Fig. 1 is a diagram used to explain the device used to perform the vapor phase rust prevention test in the present invention.
- a water-glycol hydraulic fluid with excellent rust prevention properties can be obtained by adding a specific alkanolamine compound.
- this alkanolamine compound is used as a supplementary additive, the vapor phase rust prevention properties of a water-glycol-based working liquid, which decline with the vaporization of water, can be restored to the initial level of performance.
- the alkanolamine compound of the present invention is represented by the following general formula (1).
- R 1 and R 2 represent hydrocarbon groups having from 1 to 8 carbon atoms, preferably 1-4 carbon atoms, and more preferably 3 or 4 carbon atoms.
- R 1 and R 2 may have the same number of carbon atoms or a different number of carbon atoms. However, the same number of carbon atoms is usually preferred.
- R 3 is a hydrocarbon group having 2 or more carbon atoms. However, because the water solubility of a compound tends to decrease as the number of carbon atoms increases, 2-4 carbon atoms are preferred.
- alkanolamine compounds include N,N-dimethylaminoethanol, N,N-diethylaminoethanol, N,N-dipropylaminoethanol, N,N-dibutylaminoethanol, N,N-dipentylaminoethanol, N,N-dihexylaminoethanol, N,N-diheptylaminoethanol, N,N-dioctylaminoethanol, N,N-dimethylaminopropanol, N,N-diethylaminopropanol, N,N-dipropylaminopropanol, N,N-dibutylaminopropanol, N,N-dipentylaminopropanol, N,N-dihexylaminopropanol, N,N-diheptylaminopropanol, N,N-dioctylaminopropanol, N,N-dimethylaminobut
- alkanolamine compounds are added so that the alkali reserve of the water-glycol hydraulic fluid as specified in JIS K2234-1994 is from 10 to 25, preferably from 15 to 23, and more preferably from 18 to 21.
- the 20°C density of these alkanolamine compounds is preferably from 0.86 to 0.89. When the density exceeds 0.89, volatility is reduced and the vapor phase rust prevention properties decline relative to the alkali reserve.
- alkanolamine compounds are used in water-glycol hydraulic fluid, and there are no particular restrictions on the composition of the water-glycol hydraulic fluid. However, the following composition is preferred. Relative to a total of 100% by mass, water is 20-60% by mass, preferably 30-50% by mass, a fatty acid-based lubricant is 0.6-1.2% by mass, an alkali hydroxide compound is 0.01-0.12% by mass, and a glycol is 20-60% by mass.
- glycols examples include ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, diethylene glycol, dipropylene glycol, dibutylene glycol, dihexylene glycol, trimethylene glycol, triethylene glycol, and tripropylene glycol. These glycols can be used alone or in mixtures of two or more. Use of propylene glycol or dipropylene glycol is preferred.
- the amount of glycol used is 20-60% by mass, and more preferably 30-50% by mass, relative to the total mass of the water-glycol hydraulic fluid composition.
- fatty acid-based lubricants include saturated fatty acids such as capric acid, undecylic acid, lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, margaric acid and stearic acid, and unsaturated fatty acids such as oleic acid, linoleic acid, and linolenic acid. Sodium salts of these fatty acids can also be used.
- Examples include sodium caprate, sodium undecylenate, sodium laurate, sodium tridecylenate, sodium myristate, sodium pentadecylate, sodium palmitate, sodium margarate, sodium stearate, sodium oleate, sodium linoleate, and sodium linolenate.
- Dimerized fatty acids are liquid fatty acids containing a dibasic acid of a C36 dicarboxylic acid produced by dimerization of a C18 unsaturated fatty acid containing a vegetable fat or oil as a main component, but also a monobasic acid and a tribasic acid. These fatty acids, sodium salts of fatty acids, and dimerized fatty acids may be used alone or in mixtures of two or more as the fatty acid-based lubricant.
- alkali hydroxide compounds include potassium hydroxide and sodium hydroxide. These may be used alone or together when appropriate.
- the amount of alkaline hydroxide compound is 0.01-0.12% by mass, and more preferably 0.04-0.06% by mass, relative to the total mass of the composition.
- a specific phosphoric acid ester compound can be used as an antiwear agent.
- This phosphoric acid ester has the following structure.
- R 4 and R 5 may be the same or different and represent a hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms
- R 6 represents a hydrocarbon group having from 1 to 20 carbon atoms
- R 7 represents a hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms
- X 1 , X 2 , X 3 and X 4 may be the same or different and represent an oxygen atom or a sulfur atom.
- water-glycol hydraulic fluid examples include thickeners, lubricants, metal deactivators, wear inhibitors, extreme pressure agents, dispersants, metal detergents, friction modifiers, corrosion inhibitors, anti-emulsifiers, and defoamers. These additives may be used alone or in combination with each other.
- an additive package for water-glycol hydraulic fluids may be used.
- An alkanolamine compound described above can be used as a supplementary additive while a water-glycol hydraulic fluid is being used.
- a water-glycol hydraulic fluid When a new water-glycol hydraulic fluid is used, the water is vaporized, additives are vaporized along with the water, and the vapor phase rust prevention properties decline.
- One way of determining the vapor phase rust prevention properties of a water-glycol hydraulic fluid is to measure the alkali reserve as specified in JIS K2234-1994.
- an alkanolamine compound described above is added to a water-glycol hydraulic fluid as a supplementary additive until the initial alkali reserve has been restored.
- a water-glycol hydraulic fluid can be used stably over a long period of time.
- R 1 and R 2 most preferably are 3 or 4 carbon atoms. This makes handling of the supplementary additive easy, and the hydraulic fluid in hydraulic equipment can be safely replenished by an on-site worker.
- Water-glycol hydraulic fluids containing an alkanolamine compound of the present invention will now be described in detail with reference to the following non-limiting examples and comparative examples.
- alkali reserve is determined by measuring the basic components in a water-glycol hydraulic fluid using the alkali reserve measuring method specified in JIS K2234-1994.
- the alkali reserve indicates the amount of 0.1N hydrochloric acid in ml required to adjust the pH to 5.5 and neutralize the basic components in 10 ml of a sample oil.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.90% by mass N,N-dibutylaminoethanol as the alkanolamine compound, 37.73% by mass propylene glycol as the glycol, 16.10% by mass water-soluble polymer as the thickener, identical amounts of dimerized fatty acid and lauric acid as the fatty acid lubricants for a total of 0.80% by mass, 0.06% by mass sodium hydroxide as the alkali hydroxide compound, 1.57% by mass other additives such as a corrosion inhibitor and defoamer, and 41.84% by mass water.
- the alkali reserve obtained in accordance with JIS K2234-1994 was 20.
- the 40°C kinematic viscosity was 46 mm 2 /s and the pH was 11.
- the N,N-dibutylaminoethanol used here had a molecular weight of 173, a 20°C density of 0.860, a flash point of 90°C, and a boiling point of 226°C.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.00% by mass of N,N-dimethylaminoethanol as the alkanolamine compound, 38.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water.
- the alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm 2 /s.
- the N,N-dimethylaminoethanol used here had a molecular weight of 89, a 20°C density of 0.888, a flash point of 40°C, and a boiling point of 134°C.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.40% by mass of N-ethyldiethanolamine as the alkanolamine compound, 38.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water.
- the alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm 2 /s.
- the N-ethyldiethanolamine used here had a molecular weight of 133, a 20°C density of 1.07, a flash point of 124°C, and a boiling point of 251°C.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.00% by mass of N-methylethanolamine as the alkanolamine compound, 38.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water.
- the alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm 2 /s.
- the N-ethyldiethanolamine used here had a molecular weight of 75, a 20°C density of 0.940, a flash point of 73°C, and a boiling point of 156°C.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.00% by mass of 2-ethylaminoethanol as the alkanolamine compound, 38.23% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water.
- the alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm 2 /s.
- the 2-ethyldiaminoethanol used here had a molecular weight of 117, a 20°C density of 0.918, a flash point of 77°C, and a boiling point of 199°C.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.23% by mass of mono-n-butylethanolamine as the alkanolamine compound, 38.40% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water.
- the alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm 2 /s.
- the N-mono-n-butylethanolamine amine used here had a molecular weight of 117, a 20°C density of 0.893, a flash point of 77°C, and a boiling point of 199°C.
- a water-glycol hydraulic fluid was obtained by thoroughly mixing together 39.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. Because an alkanolamine compound was not included the alkali reserve obtained in accordance with JIS K2234-1994 was 9, and the 40°C kinematic viscosity was 46 mm 2 /s.
- Example 1 The test results are shown in Table 1.
- Example 2 an alkanolamine compound was included so that the alkali reserve was 20.0. No rust was observed in the vapor phase rust prevention test performed on either example, and both obtained passing results.
- Table 1 Ex. 1 Ex. 2 N,N-Dibutylaminoethanol 1.90 N,N-Dimethylaminoethanol 1.00 Glycol 37.73 38.63 Thickener 16.10 16.10 Fatty acid lubricant 0.80 0.80 Alkali hydroxide compound 0.06 0.06 Other additives 1.57 1.57 Water 41.84 41.84 Alkali reserve 20.0 20.0 Vapor phase rust prevention test Passed Passed
- Comparative Example 5 shown in Table 2, an alkanolamine compound was not included so the alkali reserve was a low 9.0, rust was observed in the vapor phase rust prevention test, and a failing result was obtained.
- Comparative Example 2 to Comparative Example 4 an alkanolamine compound was included so that the alkali reserve was 20.0, but the alkanolamine compounds were not a dialkylaminoalkanol according to the present invention, so rust was observed in the vapor phase rust prevention test, and failing results were obtained.
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Description
- The present invention relates to a water-glycol hydraulic fluid composition and a supplementary additive therefor.
- The hydraulic fluid is used as a medium for transmitting power in hydraulic equipment. Petroleum-based hydraulic fluids are widely used, and commonly used general hydraulic fluids use a mineral oil-based base oil such as a highly refined paraffinbased base oil.
- However, because hydraulic equipment, aluminum die casting machines, and extrusion machines used in, for example, steelworks operate at high temperatures and under high pressure, there is a high risk of fire. In order to avoid the risk of fire, a water-glycol hydraulic fluid is used as the hydraulic fluid in this equipment instead of a hydraulic fluid using a mineral oil as a base oil.
- When a water-based hydraulic fluid is used, rust prevention is required so that hydraulic operations can be performed smoothly and the service life of hydraulic equipment can be extended. In particular, a volatile, alkaline rust inhibitor must be added so that wall surfaces and ceiling surfaces not in contact with the hydraulic fluid do not rust. Also, while water-glycol hydraulic fluids have excellent performance, their performance deteriorates during use due to a drop in pH and oxidation. Therefore, water-based hydraulic fluid compositions obtained by, for example, adding a polyoxyalkylene glycol diether compound having a specific structure, a polyoxyalkylene glycol monoether compound, a polyoxypropylene glycol monoether compound, and a fatty acid salt to water are used to improve performance in terms of pH drop suppression and oxidation stability, for example in
JP 3233490 B2 -
WO 2009/012058 A2 discloses a substantially morpholine free water-hydraulic liquid composition, the liquid composition comprising water, a glycol, a polyglycol, an aliphatic carboxylic acid that contains from six to 14 carbon atoms, and a combination of amines and alkanolamines. - Water-glycol hydraulic fluids contain water and glycol as main components, but a phenomenon occurs in hydraulic equipment using these hydraulic fluids in which the water of these hydraulic fluids is vaporized during use. A liquid phase or vapor phase rust inhibitor is generally used as an additive in a water-glycol hydraulic fluid, but this additive is vaporized along with the water during use and so the properties of the water-glycol hydraulic fluid may exceed their appropriate range.
- In this case, it is common practice to add a supplementary additive to maintain the performance of water-glycol hydraulic fluids and keep the properties of hydraulic fluids within the appropriate range.
- Therefore, it is an object of the present invention to improve the performance of water-glycol hydraulic fluids used in hydraulic equipment and to obtain a supplementary additive that can effectively maintain vapor phase rust prevention performance.
- The present invention provides a water-glycol hydraulic fluid containing 20-60% by mass water and 20-60% by mass glycol, with the remainder being, for example, a fatty acid-based lubricant, alkaline hydroxide compound, thickener, anticorrosive, and antifoaming agent to bring the total to 100% by mass. As a result of extensive research conducted to solve this problem, the present inventor and others discovered that use of a specific alkanolamine compound could significantly improve the vapor phase rust prevention properties of a water-glycol hydraulic fluid, and that this alkanolamine compound could be used as an effective supplementary additive.
-
- In the general formula, R1 and R2 are hydrocarbon groups having from 1 to 8 carbon atoms, and R3 is a hydrocarbon group having 2 or more carbon atoms. This alkanolamine compound is also used as a supplementary additive in a water-glycol hydraulic fluid.
-
Fig. 1 is a diagram used to explain the device used to perform the vapor phase rust prevention test in the present invention. - In the present invention, a water-glycol hydraulic fluid with excellent rust prevention properties can be obtained by adding a specific alkanolamine compound. In addition, when the water in a water-glycol hydraulic fluid being used in hydraulic equipment is vaporized and this alkanolamine compound is used as a supplementary additive, the vapor phase rust prevention properties of a water-glycol-based working liquid, which decline with the vaporization of water, can be restored to the initial level of performance.
-
- Here, R1 and R2 represent hydrocarbon groups having from 1 to 8 carbon atoms, preferably 1-4 carbon atoms, and more preferably 3 or 4 carbon atoms. R1 and R2 may have the same number of carbon atoms or a different number of carbon atoms. However, the same number of carbon atoms is usually preferred. R3 is a hydrocarbon group having 2 or more carbon atoms. However, because the water solubility of a compound tends to decrease as the number of carbon atoms increases, 2-4 carbon atoms are preferred.
- Examples of these alkanolamine compounds include N,N-dimethylaminoethanol, N,N-diethylaminoethanol, N,N-dipropylaminoethanol, N,N-dibutylaminoethanol, N,N-dipentylaminoethanol, N,N-dihexylaminoethanol, N,N-diheptylaminoethanol, N,N-dioctylaminoethanol, N,N-dimethylaminopropanol, N,N-diethylaminopropanol, N,N-dipropylaminopropanol, N,N-dibutylaminopropanol, N,N-dipentylaminopropanol, N,N-dihexylaminopropanol, N,N-diheptylaminopropanol, N,N-dioctylaminopropanol, N,N-dimethylaminobutanol, N,N-diethylaminobutanol, N,N-dipropylaminobutanol, N,N-dibutylaminobutanol, N,N-dipentylaminobutanol, N,N-dihexylaminobutanol, N,N-diheptylaminobutanol, N,N-dioctylaminobutanol, N-butyl (N-pentyl) aminoethanol, N-butyl (N-hexyl) amino ethanol, N-butyl (N-heptyl) aminoethanol, N-butyl (N-pentyl) aminopropanol, N-butyl (N-hexyl) aminopropanol, and N-butyl (N-heptyl) aminopropanol. The alkanolamine is N,N-dibutylaminoethanol.
- These alkanolamine compounds are added so that the alkali reserve of the water-glycol hydraulic fluid as specified in JIS K2234-1994 is from 10 to 25, preferably from 15 to 23, and more preferably from 18 to 21. The 20°C density of these alkanolamine compounds is preferably from 0.86 to 0.89. When the density exceeds 0.89, volatility is reduced and the vapor phase rust prevention properties decline relative to the alkali reserve.
- These alkanolamine compounds are used in water-glycol hydraulic fluid, and there are no particular restrictions on the composition of the water-glycol hydraulic fluid. However, the following composition is preferred. Relative to a total of 100% by mass, water is 20-60% by mass, preferably 30-50% by mass, a fatty acid-based lubricant is 0.6-1.2% by mass, an alkali hydroxide compound is 0.01-0.12% by mass, and a glycol is 20-60% by mass.
- Examples of glycols include ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, diethylene glycol, dipropylene glycol, dibutylene glycol, dihexylene glycol, trimethylene glycol, triethylene glycol, and tripropylene glycol. These glycols can be used alone or in mixtures of two or more. Use of propylene glycol or dipropylene glycol is preferred. The amount of glycol used is 20-60% by mass, and more preferably 30-50% by mass, relative to the total mass of the water-glycol hydraulic fluid composition.
- Examples of fatty acid-based lubricants include saturated fatty acids such as capric acid, undecylic acid, lauric acid, tridecylic acid, myristic acid, pentadecylic acid, palmitic acid, margaric acid and stearic acid, and unsaturated fatty acids such as oleic acid, linoleic acid, and linolenic acid. Sodium salts of these fatty acids can also be used. Examples include sodium caprate, sodium undecylenate, sodium laurate, sodium tridecylenate, sodium myristate, sodium pentadecylate, sodium palmitate, sodium margarate, sodium stearate, sodium oleate, sodium linoleate, and sodium linolenate.
- There are also aromatic fatty acids and dimerized fatty acids. Dimerized fatty acids are liquid fatty acids containing a dibasic acid of a C36 dicarboxylic acid produced by dimerization of a C18 unsaturated fatty acid containing a vegetable fat or oil as a main component, but also a monobasic acid and a tribasic acid. These fatty acids, sodium salts of fatty acids, and dimerized fatty acids may be used alone or in mixtures of two or more as the fatty acid-based lubricant.
- Examples of alkali hydroxide compounds include potassium hydroxide and sodium hydroxide. These may be used alone or together when appropriate. The amount of alkaline hydroxide compound is 0.01-0.12% by mass, and more preferably 0.04-0.06% by mass, relative to the total mass of the composition.
-
- In this formula, R4 and R5 may be the same or different and represent a hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms, R6 represents a hydrocarbon group having from 1 to 20 carbon atoms, R7 represents a hydrogen atom or a hydrocarbon group having from 1 to 30 carbon atoms, and X1, X2, X3 and X4 may be the same or different and represent an oxygen atom or a sulfur atom.
- If necessary, commonly used additives may be included in the water-glycol hydraulic fluid. Examples include thickeners, lubricants, metal deactivators, wear inhibitors, extreme pressure agents, dispersants, metal detergents, friction modifiers, corrosion inhibitors, anti-emulsifiers, and defoamers. These additives may be used alone or in combination with each other. Here, an additive package for water-glycol hydraulic fluids may be used.
- An alkanolamine compound described above can be used as a supplementary additive while a water-glycol hydraulic fluid is being used. When a new water-glycol hydraulic fluid is used, the water is vaporized, additives are vaporized along with the water, and the vapor phase rust prevention properties decline. One way of determining the vapor phase rust prevention properties of a water-glycol hydraulic fluid is to measure the alkali reserve as specified in JIS K2234-1994. Here, an alkanolamine compound described above is added to a water-glycol hydraulic fluid as a supplementary additive until the initial alkali reserve has been restored. When vapor phase rust prevention properties are maintained, a water-glycol hydraulic fluid can be used stably over a long period of time.
- Among the alkanolamine compounds listed above, dimethylethanolamine and diethylethanolamine have been designated as toxic substances, so strict controls are required when handling them. Therefore, when used as a supplementary additive, R1 and R2 most preferably are 3 or 4 carbon atoms. This makes handling of the supplementary additive easy, and the hydraulic fluid in hydraulic equipment can be safely replenished by an on-site worker.
- Water-glycol hydraulic fluids containing an alkanolamine compound of the present invention will now be described in detail with reference to the following non-limiting examples and comparative examples.
- The "alkali reserve" mentioned above is determined by measuring the basic components in a water-glycol hydraulic fluid using the alkali reserve measuring method specified in JIS K2234-1994. The alkali reserve indicates the amount of 0.1N hydrochloric acid in ml required to adjust the pH to 5.5 and neutralize the basic components in 10 ml of a sample oil.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.90% by mass N,N-dibutylaminoethanol as the alkanolamine compound, 37.73% by mass propylene glycol as the glycol, 16.10% by mass water-soluble polymer as the thickener, identical amounts of dimerized fatty acid and lauric acid as the fatty acid lubricants for a total of 0.80% by mass, 0.06% by mass sodium hydroxide as the alkali hydroxide compound, 1.57% by mass other additives such as a corrosion inhibitor and defoamer, and 41.84% by mass water. The alkali reserve obtained in accordance with JIS K2234-1994 was 20. The 40°C kinematic viscosity was 46 mm2/s and the pH was 11. The N,N-dibutylaminoethanol used here had a molecular weight of 173, a 20°C density of 0.860, a flash point of 90°C, and a boiling point of 226°C.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.00% by mass of N,N-dimethylaminoethanol as the alkanolamine compound, 38.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. The alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm2/s. The N,N-dimethylaminoethanol used here had a molecular weight of 89, a 20°C density of 0.888, a flash point of 40°C, and a boiling point of 134°C.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.40% by mass of N-ethyldiethanolamine as the alkanolamine compound, 38.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. The alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm2/s. The N-ethyldiethanolamine used here had a molecular weight of 133, a 20°C density of 1.07, a flash point of 124°C, and a boiling point of 251°C.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.00% by mass of N-methylethanolamine as the alkanolamine compound, 38.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. The alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm2/s. The N-ethyldiethanolamine used here had a molecular weight of 75, a 20°C density of 0.940, a flash point of 73°C, and a boiling point of 156°C.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.00% by mass of 2-ethylaminoethanol as the alkanolamine compound, 38.23% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. The alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm2/s. The 2-ethyldiaminoethanol used here had a molecular weight of 117, a 20°C density of 0.918, a flash point of 77°C, and a boiling point of 199°C.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 1.23% by mass of mono-n-butylethanolamine as the alkanolamine compound, 38.40% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. The alkali reserve obtained in accordance with JIS K2234-1994 was 20, and the 40°C kinematic viscosity was 46 mm2/s. The N-mono-n-butylethanolamine amine used here had a molecular weight of 117, a 20°C density of 0.893, a flash point of 77°C, and a boiling point of 199°C.
- A water-glycol hydraulic fluid was obtained by thoroughly mixing together 39.63% by mass glycol, 16.10% by mass thickener, 0.80% by mass fatty acid lubricant, 0.06% by mass alkaline hydroxide compound, 1.57% by mass other additives, and 41.84% by mass water. Because an alkanolamine compound was not included the alkali reserve obtained in accordance with JIS K2234-1994 was 9, and the 40°C kinematic viscosity was 46 mm2/s.
- The vapor phase rust prevention properties of the examples and comparative examples were evaluated as follows.
- As shown in
Fig. 1 , 100 g of the water-glycol hydraulic fluid in an example or a comparative example was added to a hard glass test tube with a height of 600 mm and an outer diameter of 50 mm used in the turbine oil oxidation stability test in JIS K2514-2, and two 80 × 30 × 2 mm test pieces of rolled steel for general structures (SS-400) were suspended above and below the test tube. The opening at the top of the test tube was covered with a cooler, the bottom of the test tube was placed in a constant temperature bath at 50°C, and the presence or absence of rust on the test pieces was visually confirmed after allowing the tube to stand for 200 hours. -
- Rust was observed on neither test piece Passed
- Rust was observed on one or both test pieces ...... Failed
- The test results are shown in Table 1. In Example 1 and Example 2 shown in Table 1, an alkanolamine compound was included so that the alkali reserve was 20.0. No rust was observed in the vapor phase rust prevention test performed on either example, and both obtained passing results.
Table 1 Ex. 1 Ex. 2 N,N-Dibutylaminoethanol 1.90 N,N-Dimethylaminoethanol 1.00 Glycol 37.73 38.63 Thickener 16.10 16.10 Fatty acid lubricant 0.80 0.80 Alkali hydroxide compound 0.06 0.06 Other additives 1.57 1.57 Water 41.84 41.84 Alkali reserve 20.0 20.0 Vapor phase rust prevention test Passed Passed - In Comparative Example 5 shown in Table 2, an alkanolamine compound was not included so the alkali reserve was a low 9.0, rust was observed in the vapor phase rust prevention test, and a failing result was obtained. In Comparative Example 2 to Comparative Example 4, an alkanolamine compound was included so that the alkali reserve was 20.0, but the alkanolamine compounds were not a dialkylaminoalkanol according to the present invention, so rust was observed in the vapor phase rust prevention test, and failing results were obtained.
Table 2 Comp. Ex. 1 Comp. Ex. 2 Comp. Ex. 3 Comp. Ex. 4 Comp. Ex. 5 N-Ethyldiethanolamine 1.40 N-Methylethanolamine 1.00 2-Ethylaminoethanol 1.00 Mono-n-butylethanolamine 1.23 Glycol 38.23 38.63 38.63 38.40 39.63 Thickener 16.10 16.10 16.10 16.10 16.10 Fatty acid lubricant 0.80 0.80 0.80 0.80 0.80 Alkali hydroxide compound 0.06 0.06 0.06 0.06 0.06 Other additives 1.57 1.57 1.57 1.57 1.57 Water 41.84 41.84 41.84 41.84 41.84 Alkali reserve 20.0 20.0 20.0 20.0 9.0 Vapor phase rust prevention test Failed Failed Failed Failed Failed
Claims (2)
- A water-glycol hydraulic fluid composition comprising an alkanolamine compound according to the general formula (1), wherein the water-glycol hydraulic fluid composition comprises 20-60% by mass water, 20-60% by mass glycol, 0.6-1.2% by mass fatty acid lubricant, and 0.01-0.06% by mass alkaline hydroxide compound selected from potassium hydroxide and/or sodium hydroxide, and has an alkali reserve of 10-25 as measured according to JIS K2234-1994,wherein R1 and R2 are hydrocarbon groups having from 1 to 8 carbon atoms, and R3 is a hydrocarbon group having 2 or more carbon atoms,wherein the alkanolamine compound according to general formula (I) is N,N-dibutylaminoethanol.
- A method for adjusting the alkali reserve of a water-glycol hydraulic fluid composition comprising 20-60% by mass water, 20-60% by mass glycol, 0.6-1.2% by mass fatty acid lubricant, and 0.01-0.06% by mass alkaline hydroxide compound selected from potassium hydroxide and/or sodium hydroxide, said method comprising the addition of a supplementary additive comprising a alkanolamine of general formula (1) to the water-glycol hydraulic fluid to adjust the alkali reserve of the water-glycol hydraulic fluid composition to 10-25 during use as measured according to JIS K2234-1994,
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US4390439A (en) * | 1981-03-30 | 1983-06-28 | Basf Wyandotte Corporation | Water-based hydraulic fluids having improved lubricity and corrosion inhibiting properties employing neodecanoic acid |
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