EP0087386A1 - Hydraulic fluid - Google Patents

Hydraulic fluid Download PDF

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Publication number
EP0087386A1
EP0087386A1 EP83810039A EP83810039A EP0087386A1 EP 0087386 A1 EP0087386 A1 EP 0087386A1 EP 83810039 A EP83810039 A EP 83810039A EP 83810039 A EP83810039 A EP 83810039A EP 0087386 A1 EP0087386 A1 EP 0087386A1
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EP
European Patent Office
Prior art keywords
weight
hydraulic fluid
parts
polyisobutylene
aluminum
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.)
Granted
Application number
EP83810039A
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German (de)
French (fr)
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EP0087386B1 (en
Inventor
Rudolf Baur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
Schweizerische Aluminium AG
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Application filed by Alusuisse Holdings AG, Schweizerische Aluminium AG filed Critical Alusuisse Holdings AG
Priority to AT83810039T priority Critical patent/ATE15911T1/en
Publication of EP0087386A1 publication Critical patent/EP0087386A1/en
Application granted granted Critical
Publication of EP0087386B1 publication Critical patent/EP0087386B1/en
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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
    • C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
    • 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
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/04—Fatty oil fractions
    • 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
    • C10M105/32—Esters
    • C10M105/34—Esters of monocarboxylic acids
    • 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
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • C10M107/08—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation containing butene
    • 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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
    • 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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/68—Esters
    • C10M129/70—Esters of monocarboxylic acids
    • 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
    • C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
    • C10M159/02—Natural products
    • C10M159/08—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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/026—Butene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/026—Butene
    • C10M2205/0265—Butene used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • 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
    • C10M2207/28—Esters
    • C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
    • 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
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • 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
    • C10M2207/28—Esters
    • C10M2207/284—Esters of aromatic monocarboxylic acids
    • 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
    • C10M2207/28—Esters
    • C10M2207/286—Esters of polymerised unsaturated acids
    • 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
    • C10M2207/40—Fatty vegetable or animal 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/401—Fatty vegetable or animal oils used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/402—Castor 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
    • 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
    • C10M2207/40—Fatty vegetable or animal oils
    • C10M2207/404—Fatty vegetable or animal oils obtained from genetically modified species
    • C10M2207/4045—Fatty vegetable or animal oils obtained from genetically modified species used as base material
    • 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
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties

Definitions

  • the invention relates to a hydraulic fluid, in particular for supplying hydrostatic support sources for rolls for the roll forming of aluminum and aluminum alloys.
  • the leakage oils that is, hydraulic fluids in foil rolling oil may g on the rolled and the wrapped rolls of film lead to the following errors by the action of Entfettungsglühun: adhesive film webs, unevenly degreased surfaces of the film, dark-colored Glühflecken, white colored spots of corrosion and contaminated Folienoberflä chen.
  • the thermolytically changed traces of hydraulic fluid left on the surface of aluminum foils after degreasing in an oxygen-containing atmosphere show undesirable effects.
  • both the loss angle (tg 6) of the windings and their aging behavior under current load are negatively influenced.
  • Traces of oil leaks on aluminum foils which are chemically or electrochemically etched after annealing and also serve to produce electrolytic capacitors, also have undesirable effects.
  • the inventor has set himself the task of creating a hydraulic fluid suitable for supplying hydrostatic support sources, which does not lead to any undesirable changes on the aluminum surface when aluminum is rolled when it comes into the rolling oil.
  • this problem is solved by the liquid containing 100 parts by weight of polyisobutylene, 3 to 15 parts by weight of butyl stearate and 0.5 to 5 parts by weight of palm kernel fat.
  • Polyisobutylene serves as the base liquid and carrier of the trybophysical properties.
  • Butyl stearate is added to the base liquid as a lubricant additive.
  • Palm kernel fat acts as a rust inhibitor and, as a reaction layer, also improves the emergency running properties of the hydraulic fluid. All components of this liquid can be easily removed from aluminum surfaces by degreasing.
  • polyisobutylene is preferably used as a mixture of a first polyisobutylene with an average molecular weight of about 460 and a second polyisobutylene with an average molecular weight of about 320.
  • the weight ratio of the first polyisobutylene to the second polyisobutylene is preferably 1: 9 to 1: 1, in particular 1: 4 to 1: 1.5.
  • the proportion of butyl stearate is preferably between 5 ' and 10 parts by weight.
  • the hydraulic fluid preferably contains 1 to 3 parts by weight of palm kernel fat, the content of free fatty acids of which should not exceed 0.2% by weight for reasons of corrosion.
  • the kinematic viscosity of this composition is 270 cSt at 20 ° C, 52 cSt at 50 ° C and 34 cSt at 60 ° C. It is particularly suitable for permanent temperature loads in the range from 30 to 60 ° C.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Lubricants (AREA)
  • Forging (AREA)
  • Metal Rolling (AREA)

Abstract

A hydraulic fluid which contains 100 parts by weight of polyisobutylene, 3 to 15 parts by weight of butylstearate and 0.5 to 5 parts by weight of palm seed oil. It shows good compatibility with newly rolled aluminum surfaces and is therefore particularly suitable for feeding hydrostatic means of supporting rolls for roll-forming aluminum and aluminum alloys.

Description

Die Erfindung betrifft eine Hydraulikflüssigkeit, insbesondere zur Speisung von hydrostatischen Stützquellen von Walzen für das Walzverformen von Aluminium und Aluminiumlegierungen.The invention relates to a hydraulic fluid, in particular for supplying hydrostatic support sources for rolls for the roll forming of aluminum and aluminum alloys.

Bei Walzen mit hydrostatischen Stützquellen im Inneren von rotierenden Walzenmänteln wird den Stützquellen Hydraulikflüssigkeit zugeleitet. Der angeströmte hydrostatische Flüssigkeitsfilm zwischen den Stützquellen und den Walzenmantelinnenseiten überträgt die Walzkraft und führt die entstehende Verformungswärme ab.In the case of rollers with hydrostatic support sources inside rotating roller jackets, hydraulic fluid is fed to the support sources. The flow of hydrostatic liquid film between the support sources and the inside of the roll shell transfers the rolling force and dissipates the resulting heat of deformation.

Zur Sicherstellung der tribophysikalischen Eigenschaften einer Hydraulikflüssigkeit können handelsübliche Produkte mit den vom jeweiligen Hersteller des Walzgerüstes vorge-.schriebenen Kennwerten verwendet werden. Bei der Walzverformung von Aluminium zu Folie muss aber trotz aller Vorsichtsmassnahmen damit gerechnet werden, dass Hydraulikflüssigkeit in das Folienwalzöl gelangt. Schon relativ geringe Verschmutzungen des Folienwalzöles mit handelsüblichen Hydraulikflüssigkeiten führen zu starken Beeinträchtigungen der Oberflächenqualität von Aluminiumfolie. Die Lecköle, d.h. Hydraulikflüssigkeiten im Folienwalzöl, können durch die Einwirkung der Entfettungsglühung auf die gewalzten und umgewickelten Folienrollen zu folgenden Fehlern führen: klebende Folienbahnen, ungleichmässig entfettete Folienoberflächen, dunkel gefärbte Glühflecken, weiss gefärbte Korrosionsflecken und kontaminierte Folienoberflächen. Die nach der Entfettungsglühung in sauerstoffhaltiger Atmosphäre auf der Oberfläche von Aluminiumfolien zurückbleibenden thermolytisch veränderten Hydraulikflüssigkeitsspuren zeigen unerwünschte Auswirkungen. So werden bei der Verwendung derartig kontaminierter Aluminiumfolien für die Herstellung von imprägnierten, physikalischen Kondensatoren sowohl die Verlustwinkel (tg 6 ) der Wickel als auch deren Alterungsverhalten unter Strombelastung negativ beeinflusst. Ebenfalls unerwünschte Auswirkungen zeigen Leckölspuren auf Aluminiumfolien, die nach einer Glühung chemisch oder elektrochemisch geätzt werden und zur Herstellung von Elektrolytkondensatoren dienen.To ensure tribophysikalischen properties of a hydraulic fluid commercially available products can be used with the respective manufacturer of the roll stand before g e-.schriebenen characteristics. When rolling aluminum from foil to foil, it must be taken into account that hydraulic fluid gets into the foil rolling oil despite all precautionary measures. Even relatively little contamination of the foil rolling oil with commercially available hydraulic fluids leads to severe impairments of the surface quality of aluminum foil. The leakage oils, that is, hydraulic fluids in foil rolling oil may g on the rolled and the wrapped rolls of film lead to the following errors by the action of Entfettungsglühun: adhesive film webs, unevenly degreased surfaces of the film, dark-colored Glühflecken, white colored spots of corrosion and contaminated Folienoberflä chen. The thermolytically changed traces of hydraulic fluid left on the surface of aluminum foils after degreasing in an oxygen-containing atmosphere show undesirable effects. Thus, when using such contaminated aluminum foils for the production of impregnated physical capacitors, both the loss angle (tg 6) of the windings and their aging behavior under current load are negatively influenced. Traces of oil leaks on aluminum foils, which are chemically or electrochemically etched after annealing and also serve to produce electrolytic capacitors, also have undesirable effects.

Angesichts dieser Gegebenheiten hat sich der Erfinder die Aufgabe gestellt, eine zur Speisung von hydrostatischen Stützquellen geeignete Hydraulikflüssigkeit zu schaffen, die beim Walzverformen von Aluminium -- wenn sie ins Walzöl gelangt -- zu keinen unerwünschten Veränderungen auf der Aluminiumoberfläche führt.In view of these circumstances, the inventor has set himself the task of creating a hydraulic fluid suitable for supplying hydrostatic support sources, which does not lead to any undesirable changes on the aluminum surface when aluminum is rolled when it comes into the rolling oil.

Zur Lösung dieser Aufgabe führt erfindungsgemäss, dass die Flüssigkeit 100 Gewichtsteile Polyisobutylen, 3 bis 15 Gewichtsteile Butylstearat und 0,5 bis 5 Gewichtsteile Palmkernfett enthält.According to the invention, this problem is solved by the liquid containing 100 parts by weight of polyisobutylene, 3 to 15 parts by weight of butyl stearate and 0.5 to 5 parts by weight of palm kernel fat.

Polyisobutylen dient als Basisflüssigkeit und Träger der trybophysikalischen Eigenschaften. Butylstearat wird der Basisflüssigkeit als Schmiermittelzusatz beigegeben. Palmkernfett wirkt als Rostinhibitor und verbessert als Reaktionsschichtbildner auch die Notlaufeigenschaften der Hydraulikflüssigkeit. Alle Bestandteile dieser Flüssigkeit sind durch eine Entfettungsglühung problemlos von Aluminumoberflächen entfernbar.Polyisobutylene serves as the base liquid and carrier of the trybophysical properties. Butyl stearate is added to the base liquid as a lubricant additive. Palm kernel fat acts as a rust inhibitor and, as a reaction layer, also improves the emergency running properties of the hydraulic fluid. All components of this liquid can be easily removed from aluminum surfaces by degreasing.

Zur Einstellung der jeweils gewünschten kinematischen Viskosität wird Polyisobutylen bevorzugt als Mischung eines ersten Polyisobutylens mit einem mittleren Molekulargewicht von etwa 460 und eines zweiten Polyisobutylens mit einem mittleren Molekulargewicht von etwa 320 eingesetzt. Das Gewichtsverhältnis des ersten Polyisobutylens zum zweiten Polyisobutylen beträgt vorzugsweise 1 : 9 bis 1 : 1, insbesondere 1 : 4 bis 1 : 1,5.To set the desired kinematic viscosity, polyisobutylene is preferably used as a mixture of a first polyisobutylene with an average molecular weight of about 460 and a second polyisobutylene with an average molecular weight of about 320. The weight ratio of the first polyisobutylene to the second polyisobutylene is preferably 1: 9 to 1: 1, in particular 1: 4 to 1: 1.5.

Der Anteil von Butylstearat liegt vorzugsweise zwischen 5 'und 10 Gewichtsteilen.The proportion of butyl stearate is preferably between 5 ' and 10 parts by weight.

Bevorzugt enthält die Hydraulikflüssigkeit 1 bis 3 Gewichtsteile Palmkernfett, wobei dessen Gehalt an freien Fettsäuren aus Korrosionsgründen maximal 0,2 Gew.-% betragen sollte.The hydraulic fluid preferably contains 1 to 3 parts by weight of palm kernel fat, the content of free fatty acids of which should not exceed 0.2% by weight for reasons of corrosion.

Um der Gefahr von korrosiven Einwirkungen der Hydraulikflüssigkeit weiter entgegenzuwirken, sollte ebenfalls darauf geachtet werden, dass die Flüssigkeit im wesentlichen frei von Wasserspuren ist.In order to further counteract the risk of corrosive effects of the hydraulic fluid, it should also be ensured that the fluid is essentially free of traces of water.

Die nachstehend aufgeführte Zusammensetzung der erfindungsgemässen Hydraulikflüssigkeit hat sich sowohl bezüglich ihrer tribophyiskalischen Eigenschaften als auch hinsichtlich ihrer Verträglichkeit mit frisch gewalzten Aluminiumoberflächen zur Speisung der Stützquellen von Walzmänteln bei Stützwalzen für das Walzverformen von Aluminiumbändern zu Folie als besonders geeignet herausgestellt:

  • 30 Gewichtsteile Polyisobutylen MG 460
  • 70 Gewichtsteile Polyisobutylen MG 320
  • 7 Gewichtsteile Butylstearat
  • 2 Gewichtsteile Palmkernfett
The composition of the hydraulic fluid according to the invention listed below has changed both in terms of its tribophycal properties and in terms of its compatibility with freshly rolled aluminum surfaces for feeding the support sources of roll shells In the case of back-up rolls for the roll forming of aluminum strips into film, it was found to be particularly suitable:
  • 30 parts by weight of polyisobutylene MG 460
  • 70 parts by weight of polyisobutylene MG 320
  • 7 parts by weight of butyl stearate
  • 2 parts by weight of palm kernel fat

Die kinematische Viskosität dieser Zusammensetzung beträgt 270 cSt bei 20°C, 52 cSt bei 50°C und 34 cSt bei 60°C. Sie ist inbesondere für eine Dauertemperaturbelastung im Bereich von 30 bis 60°C geeignet.The kinematic viscosity of this composition is 270 cSt at 20 ° C, 52 cSt at 50 ° C and 34 cSt at 60 ° C. It is particularly suitable for permanent temperature loads in the range from 30 to 60 ° C.

Claims (7)

1. Hydraulikflüssigkeit, insbesondere zur Speisung von hydrostatischen Stützquellen von Walzen für das Walzverformen von Aluminium und Aluminiumlegierungen,
dadurch gekennzeichnet,
dass die Flüssigkeit 100 Gewichtsteile Polyisobutylen, 3 bis 15 Gewichtsteile Butylstearat und 0,5 bis 5 Gewichtsteile Palmkernfett enthält.1. hydraulic fluid, in particular for supplying hydrostatic support sources for rolls for the roll forming of aluminum and aluminum alloys,
characterized,
that the liquid contains 100 parts by weight of polyisobutylene, 3 to 15 parts by weight of butyl stearate and 0.5 to 5 parts by weight of palm kernel fat. 2. Hydraulikflüssigkeit nach Anspruch 1, gekennzeichnet durch eine Mischung eines ersten Polyisobutylens mit einem mittleren Molekulargewicht von etwa 460 und eines zweiten Polyisobutylens mit einem mittleren Molekulargewicht von etwa 320.2. Hydraulic fluid according to claim 1, characterized by a mixture of a first polyisobutylene with an average molecular weight of about 460 and a second polyisobutylene with an average molecular weight of about 320. 3. Hydraulikflüssigkeit nach Anspruch 2, dadurch gekennzeichnet, dass das Gewichtsverhältnis des ersten Polyisobutylens zum zweiten Polyisobutylen 1 : 9 bis 1 : 1, vorzugsweise 1 : 4 bis 1 : 1,5 beträgt.3. Hydraulic fluid according to claim 2, characterized in that the weight ratio of the first polyisobutylene to the second polyisobutylene is 1: 9 to 1: 1, preferably 1: 4 to 1: 1.5. 4. Hydraulikflüssigkeit nach Anspruch 1, gekennzeichnet durch 5 bis 10 Gewichtsteile Butylstearat.4. Hydraulic fluid according to claim 1, characterized by 5 to 10 parts by weight of butyl stearate. 5. Hydraulikflüssigkeit nach Anspruch 1, gekennzeichnet durch 1 bis 3 Gewichtsteile Palmkernfett.5. Hydraulic fluid according to claim 1, characterized by 1 to 3 parts by weight of palm kernel fat. 6. Hydraulikflüssigkeit nach Anspruch 5, dadurch gekennzeichnet, dass der Gehalt des Palmkernfettes an freien Fettsäuren maximal 0,2 Gew.-% beträgt.6. Hydraulic fluid according to claim 5, characterized in that the content of free fatty acids in the palm kernel fat is at most 0.2% by weight. 7. Hydraulikflüssigkeit nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Flüssigkeit im wesentlichen frei von Wasserspuren ist.7. Hydraulic fluid according to one of claims 1 to 6, characterized in that the liquid is substantially free of traces of water.
EP83810039A 1982-02-23 1983-02-01 Hydraulic fluid Expired EP0087386B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83810039T ATE15911T1 (en) 1982-02-23 1983-02-01 HYRAULIC FLUID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1091/82A CH649575A5 (en) 1982-02-23 1982-02-23 HYDRAULIC FLUID.
CH1091/82 1982-02-23

Publications (2)

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EP0087386A1 true EP0087386A1 (en) 1983-08-31
EP0087386B1 EP0087386B1 (en) 1985-10-02

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EP83810039A Expired EP0087386B1 (en) 1982-02-23 1983-02-01 Hydraulic fluid

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US (1) US4488979A (en)
EP (1) EP0087386B1 (en)
JP (1) JPS58160397A (en)
AT (1) ATE15911T1 (en)
CH (1) CH649575A5 (en)
DE (2) DE3207296C2 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
GB2185996A (en) * 1986-01-10 1987-08-05 Smallman Lubricants Limited Lubricating composition comprising polybutene

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
DE68900213D1 (en) * 1988-05-10 1991-09-26 Hitachi Ltd METHOD FOR PRODUCING ELECTRICAL PIPING AGENTS WITH A LUBRICANT COMPOSITION.
CN105524684B (en) * 2015-11-19 2018-10-02 中铝润滑科技有限公司 A kind of aluminium cold rolling high temperature additive and its preparation and application

Citations (3)

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US2899390A (en) * 1959-08-11 Non-staining aluminum rolling
US3298951A (en) * 1966-01-24 1967-01-17 Roman D Guminski Stabilized polybutene composition
FR2393059A1 (en) * 1977-06-02 1978-12-29 Alusuisse SYNTHETIC LUBRICANT FOR BEARINGS

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US2366794A (en) * 1940-11-29 1945-01-09 Standard Oil Co Method of making shock absorber and hydraulic brake fluid
US2962401A (en) * 1958-03-17 1960-11-29 Aluminium Lab Ltd Cold deformation of metals
NL298362A (en) * 1962-09-26
BE672122A (en) * 1963-08-13
FR2159184B3 (en) * 1971-11-10 1974-06-21 Exxon Research Engineering Co
DE2302918C2 (en) * 1973-01-22 1982-04-08 Henkel KGaA, 4000 Düsseldorf New ester oils and their use in lubricants and hydraulic fluids

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US2899390A (en) * 1959-08-11 Non-staining aluminum rolling
US3298951A (en) * 1966-01-24 1967-01-17 Roman D Guminski Stabilized polybutene composition
FR2393059A1 (en) * 1977-06-02 1978-12-29 Alusuisse SYNTHETIC LUBRICANT FOR BEARINGS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185996A (en) * 1986-01-10 1987-08-05 Smallman Lubricants Limited Lubricating composition comprising polybutene
GB2185996B (en) * 1986-01-10 1989-12-28 Smallman Lubricants Limited Lubricating composition

Also Published As

Publication number Publication date
US4488979A (en) 1984-12-18
CH649575A5 (en) 1985-05-31
EP0087386B1 (en) 1985-10-02
ATE15911T1 (en) 1985-10-15
DE3207296C2 (en) 1984-05-30
DE3207296A1 (en) 1983-09-08
DE3360903D1 (en) 1985-11-07
JPS58160397A (en) 1983-09-22

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