NO325041B1 - Hydrauliske fluidblandinger - Google Patents
Hydrauliske fluidblandinger Download PDFInfo
- Publication number
- NO325041B1 NO325041B1 NO19984814A NO984814A NO325041B1 NO 325041 B1 NO325041 B1 NO 325041B1 NO 19984814 A NO19984814 A NO 19984814A NO 984814 A NO984814 A NO 984814A NO 325041 B1 NO325041 B1 NO 325041B1
- Authority
- NO
- Norway
- Prior art keywords
- hydraulic fluid
- mixture
- mixture according
- fluid mixture
- ester
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 43
- 239000012530 fluid Substances 0.000 title claims abstract description 34
- 150000002148 esters Chemical class 0.000 claims abstract description 28
- 229920005862 polyol Polymers 0.000 claims abstract description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 9
- 229930195729 fatty acid Natural products 0.000 claims abstract description 9
- 239000000194 fatty acid Substances 0.000 claims abstract description 9
- 150000003077 polyols Chemical class 0.000 claims abstract description 9
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 8
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 7
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 7
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 7
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 7
- 239000005642 Oleic acid Substances 0.000 claims description 7
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 7
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 150000007513 acids Chemical class 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- FVCPXLWAKNJIKK-UHFFFAOYSA-N Dimexano Chemical compound COC(=S)SSC(=S)OC FVCPXLWAKNJIKK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 239000003995 emulsifying agent Substances 0.000 claims description 2
- -1 fatty acid ester Chemical class 0.000 claims description 2
- 230000003254 anti-foaming effect Effects 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000518 rheometry Methods 0.000 abstract 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 150000004668 long chain fatty acids Chemical class 0.000 description 4
- OBETXYAYXDNJHR-SSDOTTSWSA-M (2r)-2-ethylhexanoate Chemical compound CCCC[C@@H](CC)C([O-])=O OBETXYAYXDNJHR-SSDOTTSWSA-M 0.000 description 3
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 3
- 150000004666 short chain fatty acids Chemical class 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 235000021391 short chain fatty acids Nutrition 0.000 description 2
- GYSCBCSGKXNZRH-UHFFFAOYSA-N 1-benzothiophene-2-carboxamide Chemical compound C1=CC=C2SC(C(=O)N)=CC2=C1 GYSCBCSGKXNZRH-UHFFFAOYSA-N 0.000 description 1
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexanol Substances CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 1
- GHVNFZFCNZKVNT-UHFFFAOYSA-N Decanoic acid Natural products CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- 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
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- C10M105/32—Esters
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Description
Foreliggende oppfinnelse angår hydrauliske fluider. Mer spesielt angår oppfinnelsen esterbaserte hydrauliske fluider med forbedrede lavtemperaturegenskaper.
Hydrauliske systemer anvendes i mange forskjellige typer mekanisk utstyr, så som automobiler, lastebiler, kraner, tog, annet transportutstyr, landbruksutstyr, skip og marint utstyr (alle mobile systemer) og ikke-mobile systemer så som i fabrikker og jernbaner. Slike hydrauliske systemer inneholder et hydraulisk fluid, som kan være basert på et petrokjemisk fluid (tradisjonelt) eller en ester/oljekje-misk basis (mer miljømessig akseptabelt).
Ved en rekke anvendelser utsettes disse hydrauliske systemer for lave temperaturer enten i miljøet eller i selve det hydrauliske system. Dette gjelder spesielt når hydrauliske systemer anvendes i land nær eller innenfor polarsirklene. Det er et kjent faktum at en rekke egenskaper hos hydrauliske fluider forandres ved forandring av temperatur i det hydrauliske fluid. Det er også kjent at lave temperaturer generelt har uheldig virkning på en rekke egenskaper hos det hydrauliske fluid, så som at hellepunktet og den (dynamiske) viskositet er for høye, og en utilstrekkelig lav temperaturstabilitet, osv.
US 4,144,183 omhandler forgrenede alifatiske esteroljer som anvendes
som smøremidler eller hydrauliske fluider.
EP 0612831 omhandler flammende hydrauliske oljer med en ester som
hovedkomponent.
US 4,234,497 omtaler en polyol ester som anvendes som base i syntetiske
smøremidler.
GB 1441918 omtaler esterblandinger og syntetiske smøremiddelblandinger
egnet for smøring av stempelmaskiner og girkasser i motorkjøretøy.
Når det gjelder hydrauliske fluider basert på petrokjemiske fluider, har det vært foreslått en rekke løsninger for forbedring av en del av lavtemperatur-egenskapene, for eksempel ved anvendelse av additiver så som hellepunktnedsettende midler. Inntil i dag er det imidlertid kjent at slike additiver ikke kan anvendes i hydrauliske fluider basert på estere/oljekjemikalier, på grunn av at de enten er uforenlige med esterne/oljekjemikaliene eller at slike additiver har utilstrekkelig effekt (den ønskede effekt er gode egenskaper ved lave temperaturer).
Det har følgelig vært et behov for et ester/oljekjemikaliebasert hydraulisk fluid med forbedrede lavtemperaturegenskaper, sammenliknet med vanlige ester/oljekjemikaliebaserte hydrauliske fluider. De «ester/oljekjemikalie-baserte fluider» skal i det foreliggende forstås som fluider egnet for anvendelse som hydraulisk (basis)-fluid for anvendelse i et hydraulisk system, hvor minst hovedandelen (dvs. mer enn 50 vekt%) består av en ester av en polyol og en karboksylsyre. Det er videre et formål med oppfinnelsen at det ester/oljekjemikalie-baserte hydraulisk fluid fremdeles har tilfredsstillende egenskaper ved «normalanvendelses»-temperaturer, i tillegg til de forbedrede lavtemperaturegenskaper. En viktig egenskap når det gjelder «normalanvendelses»-temperaturer, er den kinematiske viskositet ved 40 og 100°C. Med forbedrede lavtemperaturegenskaper menes at egenskapene hos det hydraulisk fluid er forbedret ved minst ett aspekt, fortrinnsvis lavtemperaturstabilitet.
Med lavtemperaturstabilitet menes at væsken fremdeles har egnede egenskaper etter at den er holdt ved lav temperatur i et betydelig tidsrom (en rekke dager). En måte å kvantifisere lavtemperaturstabilitet er ved hjelp av testmetoden ifølge ASTM D2531. Kort angitt består metoden av måling av den (kinematiske) viskositet for væsken etter at den er blitt holdt på -30°C i 168 timer. Den således målte viskositet bør da være under en spesifisert grense.
Det er nå blitt funnet at ovennevnte formål kan nås med en hydraulisk fluidblanding som omfatter mer enn 50 vekt% basert på total blanding av en ester av en polyol og en blanding av fettsyrer, hvor polyolen er valgt fra gruppen bestående av TMP, PE, NPG, di-TMP, tri-TMP, di-PE og tri-PE, og fettsyrene består hovedsakelig av en del (I) rettkjedede og/eller forgrenede Cs- og/eller C10-syrer og en annen del (II) av oljesyre, hvor forholdet mellom de forestrede syrene (l):(ll) er i området 1:1 til 1:20 på vektbasis, og hvor blandingen har en viskositet på 7000 mm<2>/s eller lavere, ved undersøkelse ifølge ASTM (D2531).
En slik ester omtales ofte som en blandet ester, noe som betyr at (gjennomsnittlig) hvert estermolekyl inneholder minst to forskjellige karboksylsyredeler. Nevnte kortkjedede fettsyrer samt lange fettsyrer kan være rettkjedede eller forgrenede (eller blandinger av disse).
Blandingen har fortrinnsvis en viskositet på 5000 mm<2>/s eller lavere ved testing ifølge ASTM (D2531).
For kombinering av gode lav- og høytemperaturegenskaper er det foretrukket at forholdet mellom kortkjedet fettsyre og langkjedet fettsyre i de blandede estere bør være mellom 1:1 og 1:20 på vektprosentbasis. Det ble funnet at i mange tilfeller trenges en relativt liten mengde kortkjedede fettsyrer for oppnåelse av den ønskede effekt, og følgelig er det enda mer foretrukket at det ovenfor angitte forhold er mellom 1:1 og 1:10 på vektbasis.
Skjønt blandingene ifølge oppfinnelsen fortrinnsvis er fri for additiver så som en emulgator eller et hellepunktnedsettende middel, kan spesifikke additiver så som en antioksidant (f.eks. amin- eller fenol-antioksidanttyper), viskositets-indeks-(Vl)-forbedrende middel (f.eks. polymetakrylat-forbindelser), en antislitasjeforbindelse (f.eks. ditiofosfater, kalsiumsulfonater, bariumsulfonater) og en antiskummingsforbindelse (f.eks. modifiserte dimetylpolysiloksaner) tilsettes til blandingene.
Blandingene ifølge oppfinnelsen omfatter fortrinnsvis estere av polyoler valgt fra gruppen som består av TMP (trimetylolpropan), PE (pentaerytritol), NPG (neopentylglykol), di-TMP, tri-TMP, di-PE, tri-PE. En høyst foretrukket polyol er
TMP.
Esterne ifølge oppfinnelsen har fortrinnsvis en syreverdi på under 5,0, fortrinnsvis under 1,0 mg KOH/g.
Blandingen som skal anvendes som hydraulisk fluid, omfatter fortrinnsvis minst 75 vekt%, mer foretrukket minst 85 vekt% av de blandede estere som definert ovenfor. Mest foretrukket er et hydraulisk fluid omfattende minst 95 vekt% av esterne som definert ovenfor.
Skjønt blandingene ifølge oppfinnelsen i noen tilfeller kan anvendes som sådanne i et hydraulisk system, er det også mulig at slike blandinger anvendes ved fremstilling av hydrauliske fluider, ved at de for eksempel kompounderes med andre fluider eller additiver.
En ytterligere utførelsesform av oppfinnelsen er anvendelse av blandingene ifølge det ovenfor anførte, i hydraulisk utstyr. Slikt hydraulisk utstyr kan være en del av et mobilt system.
Oppfinnelsen er ytterligere illustrert ved følgende eksempler.
EKSEMPLER
Eksempel 1
En firehalset kolbe med et indre volum på 2 liter ble utstyrt med rører, termometer/temperaturreguleringsinnretning, en nitrogengass-blåseinnretning og en vannseparator av typen Dean og Stark knyttet til en tilbakeløpskondensator. I kolben gle det fylt 220,1 g (1,64 mol) trimetylolpropan, 165 g (0,96 mol) av en oktan/dekansyreblanding (i et vektforhold på ca. 55:45) og 1115 g (3,97 mol) oljesyre. Blandingen ble forestret, oppvarmet ved hjelp av en manteloppvarmingsinnretning i en strøm av nitrogen. Etter tilførsel av varme i ca. 1 time, idet man startet ved romtemperatur, ble det oppnådd en temperatur på 160°C, og reaksjonsvannet ble destillert av. Temperaturen ble gradvis øket til 250°C, og 90 ml vann ble oppsamlet. På dette punkt ble vannseparatoren fjernet, og vakuum ble påført ved reaksjonsblandingen. Reaksjonen var fullstendig på en total reaksjonstid på ca. 7 timer. Totalt 75 g organiske lettfraksjoner ble destillert av i løpet av det siste trinn av reaksjonen. Til slutt ble esterproduktet filtrert for fjerning av eventuelle mekaniske forurensninger.
GLC-analyse av den således oppnådde ester viste at den inneholdt 13 vekt% av C8/C10-blandingen (forhold: 56,9:43,1) og 87 vekt% oljesyre (blant oljefraksjonen er mindre mengder av andre langkjedede fettsyrer).
Esterens egenskaper er oppført i tabell 1.
Eksempel 2
En firehalset kolbe med et indre volum på 2 liter ble utstyrt med rører, termometer/temperaturreguleringsinnretning, en nitrogengassblåseinnretning og en vannseparator av typen Dean og Stark knyttet til en tilbakeløpskondensator. I kolben ble det fylt 227,4 g (1,70 mol) trimetylolpropan, 164 g (1,14 mol) 2-etylheksansyre og 1109 g (3,95 mol) oljesyre. Blandingen ble forestret, oppvarmet ved hjelp av en manteloppvarmingsinnretning i en strøm av nitrogen. Etter ca. 1 time ble det oppnådd en temperatur på 160°C, og reaksjonsvannet ble destillert av. Temperaturen ble gradvis øket til 250°C, og 90 ml vann ble oppsamlet. På dette punkt ble vannseparatoren fjernet, og vakuum ble påført ved reaksjonsblandingen. Reaksjonen var fullstendig innen en total reaksjonstid på ca. 7 timer. Totalt 75 g organiske lettfraksjoner ble destillert av i løpet av det siste trinn av reaksjonen. Til slutt ble esterproduktet filtrert for fjerning av eventuelle mekaniske forurensninger.
GLC-analyse av den således oppnådde ester viste at den inneholdt 13,4 vekt% av 2-etylheksansyren og 86,6 vekt% oljesyre (blant oljefraksjonen er mindre mengder av andre langkjedede fettsyrer).
Egenskapene hos den således oppnådde ester er oppført i tabell 1.
TMP er trimetylolpropan. Cb/C-io er en blanding av fettsyrer med 8 eller 10 karbonatomer. 2-EH er 2-etylheksansyre (forgrenet C8). Ci8:i er (hovedsakelig) oljesyre.
Claims (11)
1. Hydraulisk fluidblanding som omfatter mer enn 50 vekt% basert på total blanding av en ester av en polyol og en blanding av fettsyrer, karakterisert ved at polyolen er valgt fra gruppen bestående av TMP, PE, NPG, di-TMP, tri-TMP, di-PE og tri-PE, og fettsyrene består hovedsakelig av en del (I) rettkjedede og/eller forgrenede Cs- og/eller Cio-syrer og en annen del (II) av oljesyre, hvor forholdet mellom de forestrede syrene (l):(ll) er i området 1:1 til 1:20 på vektbasis, og hvor blandingen har en viskositet på 7000 mm<2>/s eller lavere, ved undersøkelse ifølge ASTM (D2531).
2. Hydraulisk fluidblanding ifølge krav 1,
karakterisert ved at blandingen har en viskositet på 5000 mm<2>/s eller lavere ved undersøkelse ifølge ASTM (D2531).
3. Hydraulisk fluidblanding ifølge krav 1 eller 2,
karakterisert ved at forholdet (I): (II) er mellom 1:1 og 1:10 på vektbasis.
4. Hydraulisk fluidblanding ifølge hvilket som helst av kravene 1 -3, karakterisert ved at blandingen er hovedsakelig fri for emulgator.
5. Hydraulisk fluidblanding ifølge hvilket som helst av kravene 1-4, karakterisert ved at den videre omfatter en antioksidant.
6. Hydraulisk fluidblanding ifølge hvilket som helst av kravene 1-5, karakterisert ved at den videre omfatter et viskositetsindeks-(VI)-forbedrende middel.
7. Hydraulisk fluidblanding ifølge hvilket som helst av kravene 1 -6, karakterisert ved at den videre omfatter en antislitasjeforbindelse.
8. Hydraulisk fluidblanding ifølge hvilket som helst av kravene 1-7, karakterisert ved at den videre omfatter en antiskummingsforbindelse.
9. Blanding ifølge hvilket som helst av kravene 1-8,
karakterisert ved at den omfatter hovedsakelig intet hellepunktnedsettende middel.
10. Hydraulisk fluidblanding ifølge hvilket som helst av kravene 1 -9, karakterisert ved at polyolen omfatter TMP.
11. Blanding ifølge hvilket som helst av kravene 1-10,
karakterisert ved at fettsyreesteren er tilstede i en mengde på minst 75 vekt%, basert på den totale blanding.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96201017 | 1996-04-16 | ||
PCT/EP1997/001608 WO1997039086A1 (en) | 1996-04-16 | 1997-03-26 | Hydraulic fluids |
Publications (3)
Publication Number | Publication Date |
---|---|
NO984814D0 NO984814D0 (no) | 1998-10-15 |
NO984814L NO984814L (no) | 1998-12-15 |
NO325041B1 true NO325041B1 (no) | 2008-01-21 |
Family
ID=8223875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO19984814A NO325041B1 (no) | 1996-04-16 | 1998-10-15 | Hydrauliske fluidblandinger |
Country Status (13)
Country | Link |
---|---|
US (1) | US6693064B2 (no) |
EP (1) | EP0898605B9 (no) |
JP (1) | JP4666694B2 (no) |
KR (1) | KR100465466B1 (no) |
CN (1) | CN1084786C (no) |
AT (1) | ATE192186T1 (no) |
AU (1) | AU2507297A (no) |
CA (1) | CA2250964C (no) |
DE (2) | DE69701800T3 (no) |
ES (1) | ES2144853T5 (no) |
MY (1) | MY118071A (no) |
NO (1) | NO325041B1 (no) |
WO (1) | WO1997039086A1 (no) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999018175A1 (en) * | 1997-10-03 | 1999-04-15 | Infineum Usa Lp | Lubricating compositions |
US20040075079A1 (en) * | 1998-10-13 | 2004-04-22 | Unichema Chemie Bv | Hydraulic fluids |
DE10115829A1 (de) * | 2001-03-29 | 2002-10-10 | Cognis Deutschland Gmbh | Oxidationsstabiles Hydrauliköl |
US6884761B2 (en) * | 2001-12-18 | 2005-04-26 | Bp Corporation North America Inc. | High temperature stable lubricant mixed polyol ester composition containing an aromatic carboxylic acid and method for making the same |
US20040092411A1 (en) * | 2002-11-13 | 2004-05-13 | Godici Patrick E. | High temperature stability lubricant composition containing short chain acids and method for making the same |
DE102004039545A1 (de) * | 2004-08-13 | 2006-02-23 | Rhein-Chemie Rheinau Gmbh | Neuartige Verarbeitungswirkstoffe für Kautschuk-Mischungen |
FR2939443B1 (fr) * | 2008-12-05 | 2013-01-18 | Total Raffinage Marketing | Huile lubrifiante a base d'esters de polyols |
EP2228425A1 (de) | 2009-02-27 | 2010-09-15 | Dako Ag | Schmiermittel |
DE102012103701A1 (de) * | 2012-04-26 | 2013-10-31 | Fuchs Petrolub Ag | Ester als Kühl- und Isolierflüssigkeiten für Transformatoren |
US10059872B2 (en) | 2014-12-22 | 2018-08-28 | Lonza Inc. | Corrosion inhibitor compositions for acidizing treatments |
KR102624723B1 (ko) * | 2023-08-30 | 2024-01-12 | 주식회사 엘엔씨테크 | 유압작동유 및 이의 제조방법. |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1441918A (en) * | 1972-07-20 | 1976-07-07 | Unilever Emery | Ester mixtures |
US4144183A (en) * | 1973-01-22 | 1979-03-13 | Henkel Kommanditgesellschaft Auf Aktien | Mixed branched and straight chain ester oils |
IT1010487B (it) | 1974-05-08 | 1977-01-10 | Snam Progetti | Esteri come componenti di lubrifi canti |
IT1050335B (it) † | 1975-12-11 | 1981-03-10 | Snam Progetti | Esteri organici da impiegare in composizioni lubrificanti |
GB1531278A (en) | 1975-12-15 | 1978-11-08 | Shionogi & Co | 9,10-dihydro-9,10-methanoanthracene n-oxide derivatives and the production thereof |
DE2713440A1 (de) * | 1977-03-26 | 1978-09-28 | Bayer Ag | Carbonsaeureester, deren herstellung und verwendung als basisschmieroel |
US4234497A (en) * | 1979-04-30 | 1980-11-18 | Standard Lubricants, Inc. | Iso-palmitate polyol ester lubricants |
JPS56131548A (en) | 1980-03-18 | 1981-10-15 | Nippon Oil & Fats Co Ltd | Neopentylpolyol ester, and flon-resistant oil containing said ester as base oil |
NL8102759A (nl) | 1981-06-09 | 1983-01-03 | Unilever Nv | Estersmeermiddelen. |
US4477383A (en) * | 1982-05-05 | 1984-10-16 | National Distillers And Chemical Corporation | Di- and tripentaerythritol esters of isostearic acid |
JPS59164393A (ja) * | 1983-03-10 | 1984-09-17 | Nippon Oil & Fats Co Ltd | エステル系冷凍機油 |
JPH0819431B2 (ja) | 1988-06-09 | 1996-02-28 | 日本パーカライジング株式会社 | 冷間圧延用潤滑油 |
KR950005694B1 (ko) * | 1989-07-05 | 1995-05-29 | 가부시끼가이샤 교오세끼 세이힝기주쓰 겡뀨쇼 | 냉각윤활제 |
DE3927155A1 (de) | 1989-08-17 | 1991-02-21 | Henkel Kgaa | Umweltfreundliches grundoel fuer die formulierung von hydraulikoelen |
DE4222341A1 (de) * | 1992-07-08 | 1994-01-13 | Henkel Kgaa | Grundöle mit hohem Viskositätsindex und verbessertem Kälteverhalten |
DE69317643T2 (de) * | 1992-12-07 | 1998-07-09 | Idemitsu Kosan Co | Flammfestes Hydrauliköl |
SG75080A1 (en) * | 1994-11-29 | 2000-09-19 | Sanyo Electric Co | Refrigerating apparatus and lubricating oil composition |
-
1997
- 1997-03-26 CN CN97193464A patent/CN1084786C/zh not_active Expired - Lifetime
- 1997-03-26 ES ES97916415T patent/ES2144853T5/es not_active Expired - Lifetime
- 1997-03-26 DE DE69701800T patent/DE69701800T3/de not_active Expired - Lifetime
- 1997-03-26 CA CA002250964A patent/CA2250964C/en not_active Expired - Lifetime
- 1997-03-26 EP EP97916415A patent/EP0898605B9/en not_active Expired - Lifetime
- 1997-03-26 JP JP52231797A patent/JP4666694B2/ja not_active Expired - Lifetime
- 1997-03-26 WO PCT/EP1997/001608 patent/WO1997039086A1/en active IP Right Grant
- 1997-03-26 DE DE0898605T patent/DE898605T1/de active Pending
- 1997-03-26 AU AU25072/97A patent/AU2507297A/en not_active Abandoned
- 1997-03-26 US US09/171,154 patent/US6693064B2/en not_active Expired - Lifetime
- 1997-03-26 AT AT97916415T patent/ATE192186T1/de active
- 1997-04-14 MY MYPI97001617A patent/MY118071A/en unknown
- 1997-04-15 KR KR1019970013705A patent/KR100465466B1/ko active IP Right Grant
-
1998
- 1998-10-15 NO NO19984814A patent/NO325041B1/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1997039086A1 (en) | 1997-10-23 |
AU2507297A (en) | 1997-11-07 |
ES2144853T3 (es) | 2000-06-16 |
NO984814L (no) | 1998-12-15 |
ES2144853T5 (es) | 2007-04-01 |
MY118071A (en) | 2004-08-30 |
CN1217016A (zh) | 1999-05-19 |
KR100465466B1 (ko) | 2005-02-28 |
US20020193259A1 (en) | 2002-12-19 |
JP2000507277A (ja) | 2000-06-13 |
DE69701800D1 (de) | 2000-05-31 |
JP4666694B2 (ja) | 2011-04-06 |
DE898605T1 (de) | 1999-07-22 |
EP0898605B9 (en) | 2007-11-07 |
DE69701800T2 (de) | 2000-10-19 |
EP0898605B1 (en) | 2000-04-26 |
EP0898605B2 (en) | 2006-08-30 |
US6693064B2 (en) | 2004-02-17 |
CA2250964A1 (en) | 1997-10-23 |
CN1084786C (zh) | 2002-05-15 |
DE69701800T3 (de) | 2007-05-16 |
ATE192186T1 (de) | 2000-05-15 |
EP0898605A1 (en) | 1999-03-03 |
KR970070169A (ko) | 1997-11-07 |
NO984814D0 (no) | 1998-10-15 |
CA2250964C (en) | 2004-09-14 |
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