EP0129240A1 - Hydraulische Flüssigkeiten - Google Patents

Hydraulische Flüssigkeiten Download PDF

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Publication number
EP0129240A1
EP0129240A1 EP84106971A EP84106971A EP0129240A1 EP 0129240 A1 EP0129240 A1 EP 0129240A1 EP 84106971 A EP84106971 A EP 84106971A EP 84106971 A EP84106971 A EP 84106971A EP 0129240 A1 EP0129240 A1 EP 0129240A1
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EP
European Patent Office
Prior art keywords
weight
fluid
total weight
referred
boron
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Application number
EP84106971A
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English (en)
French (fr)
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EP0129240B2 (de
EP0129240B1 (de
Inventor
Franco Dr. Galati
Mario Dr. Musco
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Montedison SpA
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Montedison SpA
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    • 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
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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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/061—Esters derived from boron
    • C10M2227/0615—Esters derived from boron 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/061—Esters derived from boron
    • C10M2227/062—Cyclic esters
    • 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/061—Esters derived from boron
    • C10M2227/062—Cyclic esters
    • C10M2227/0625—Cyclic esters 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
    • 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 refers to liquid compositions that are suited as hydraulic fluids for the transmission of power, particularly as hydraulic break fluids having a content in boron of from 0% to 1% by weight, and consisting of mixtures of glycols, glycolethers of various molecular weights and, possibly, boric glycolesters.
  • the breaking systems for motorvehicles represent an important safety element, and the efficient working of the breaks is, to a large extent, determined by the cha racteristics of the hydraulic fluids used in said breaking systems. Therefrom results that on said fluids are imposed by the current regulations very strict requisites, such as concern the prescribed characteristics of: boiling point, viscosity at high and low temperatures, the pH value, the stability at low and high temperatures, re sistance to corresion attack on metals, the swelling action on rubbers.
  • par- ticul k rly decisive for the purposes of ascertaining the suitability or unsuitability of a break fluid is theboi ling point at total reflux after humidification (WET PERT) and the viscosity at lew temperatures.
  • the affinity fer water not oxly manifests itself in the absorption of water from ahumid gaseous surrounding (atmosphere), but also in determining the intensity of the intramolecular beads which affect the value of the total reflux boiling temperature at atmospheric pressure (PERT) and on the fluidity at lowtem peratures.
  • the hydraulic break-fluids normally used must meet all FMVSS 116, DOT-3 and DOT-4 (i.e.:Federal Motor-Vehicle Safety Standard - Department of Transportation) and SAE J 1703 (Society of Automotive Engineers N.Y.) standards.
  • the break-fluid belonging to the classes DOT-3 and DOT-4 have the following characteristics:
  • French Pat. n°2.158.523 describes liquid compositions for breaks belonging to the class DOT-4, cen sisting of mixtures of tetraethylenglycol, other glycols and lower glycolethers. Said compositions possess a WET PERT slightly greater than 155°C (max. 156.5°C in example n°2), and high viscosity values at low temperatures, due to the presence of tetraethylenglycol (1590 cSt at -40°C in example 1).
  • Said liquids named DOT-3 / DOT-4 have been six- gled out in the boric esters of the glycols, and more particularly in the products of the partial or total es terification with boric acid of one or more of the com ponents of the traditional formulations based on alcohols, glycols, glycolethers, polyglycols and polygly- colethers.
  • compositions part of the absorbed wateris removed by hydrolysis reactions of the esterwiththe contemporaneous undesired tendency of the boric acid to precipitate.
  • organoborates used in the process have the drawback of either causing consistent swellings in the rubbers (esters of etheric glycols) or to produce high viscosities (esters of glycols), and at any ratete cause an unavoidable greater cost in comparison with the traditional formulations.
  • object of the present invention is that of providing compositions that be suited for use as hydraulic fluids which, though not containing boron com pounds, possess WET PERT greater than 155°C and viscosities at -40°C that be below 1500 cSt, that is, fluids belonging contemporaneously to the class DOT-3 (with refernce to the viscosity) and to DOT-4 (with reference to the WET PERT).
  • Still another object of this invention is that of providing compositions based on boric esters which, at an equal content in boron, will have WET PERT values greater than those of the compositions of the Prior Art.
  • a further object of the present invention is that of providing break fluids that will meet all the DOT-3 and DOT-4 specifications; more particularly that will meet the non-agressivity standards towards rubber and the metals present in the breaking system.
  • compositions based on the hydraulic fluids of this invention consist of:
  • Suitable alkylenglycols consist of: monomethy lenglycol, diethylenglycol, triethylenglycol, monepro- pylenglycol, dipropylenglycol, tripropylenglycol. amongst these, the preferred ones are: diethylenglycol and triethylenglycol.
  • Suitable alkylenglycol monoalkylethers(b) consist of: C 1 -C 4 monoalkylethers of alkylenglycols(a). Of these the preferred one is triethylenslycol monoethylether.
  • Suitable polyalkylenglycol monoalkylethers (c) are those in which in the above specified general formula:
  • Suitable boric esters(d) are the reaction products of a boron compound with alkylenglycols(a).
  • the preferred one is the reaction product from the reac tion of boric acid with diethylenglycol.
  • the liquid compositions obtained by means of the present invention display all a WET PERT greater than 155°C (lower limit of DOT-4 class), viscosity values at -40°C lower than 1500 cSt (top limit of class DOT-3), and PERT values of about 250°C and over. Moreover, they are characterized by an almost total lack of aggressiveness towards the various types of rubber and metals present in the breaking systems, with a con sequential considerable advantage for the life of said systems; besides displaying all the typical properties of the traditional products of the highest quality.
  • compositions of the present invention may be additioned with additives that have the purpose of boosting the performance of the breaking fluids.
  • additives that have the purpose of boosting the performance of the breaking fluids.
  • various types of additives are com prised: buffering agents, corrosion inhibitors, anti- oxidizers, substances increasing the protective power with respect to ferrous metals in a humid and oxidizing environment, stabilizers, dyestuffs.
  • the quantity of additives that may be in corporated into the liquid compositions varies from0% to 10% on the total weight of the compositions.
  • the preparation of the boric esters(a) is carried out at atmospheric pressure, preferably in the presence of an azeotropicsolvent, or at a reduced pressure in the absence of a solvent, at temperatures comprised between 50°C and 200°C.
  • the formulation of the hydraulic fluids according to the present invention is obtained by mixing together components(a), (b), (c) and (d) and additives in a mixer until achieving a thorough and complete homogenization.
  • the mixing is carried out at atmospheric pressure, room temperature and, preferably, in the ab sence of humidity.
  • a breaking, fluid was prepared by mixing together the following components:
  • a hydraulic fluid was prepared by mixing together the following components:
  • a hydraulic fluid was prepared by mixing together the following components:
  • a hydraulic break fluid was prepared by admixing the following components:
  • a hydraulic fluid was prepared by mixing together the following components:
  • a hydraulic fluid containing 0.46% of boron, was prepared by mixing together the following components:
  • a hydraulic fluid containing 0.5 % of boron, was pre pared by mixing together the following components:
  • a hydraulic fluid containing 0.7% of boron, was pre pared by mixing together the following components:
  • a hydraulic fluid containing 0.46% of boron, was pre pared by mixing together the following components:
  • a hydraulic fluid containing 0.5% of boron, was pre pared by mixing together the following components:
  • a hydraulic fluid containing 0.43% boron, was pre pared by mixing together the following components:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Lubricants (AREA)
EP84106971A 1983-06-21 1984-06-18 Hydraulische Flüssigkeiten Expired - Lifetime EP0129240B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2169883 1983-06-21
IT21698/83A IT1163547B (it) 1983-06-21 1983-06-21 Fluidi idraulici

Publications (3)

Publication Number Publication Date
EP0129240A1 true EP0129240A1 (de) 1984-12-27
EP0129240B1 EP0129240B1 (de) 1988-03-30
EP0129240B2 EP0129240B2 (de) 1994-06-01

Family

ID=11185563

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EP84106971A Expired - Lifetime EP0129240B2 (de) 1983-06-21 1984-06-18 Hydraulische Flüssigkeiten

Country Status (4)

Country Link
EP (1) EP0129240B2 (de)
JP (1) JPS6013892A (de)
DE (1) DE3470176D1 (de)
IT (1) IT1163547B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053031A2 (en) * 2002-12-09 2004-06-24 Union Carbide Chemicals & Plastics Technology Cor Poration Alkoxylates as such or as base oils for hydraulic compositions
WO2004081155A1 (de) * 2003-03-12 2004-09-23 Basf Aktiengesellschaft Dot 4-bremsflüssigkeiten
WO2014164087A1 (en) * 2013-03-12 2014-10-09 The Lubrizol Corporation Lubricating composition containing lewis acid reaction product
EP3929269A1 (de) 2020-06-22 2021-12-29 Clariant International Ltd Funktionale fluidzusammensetzung mit niedriger viskosität
EP4056669A1 (de) 2021-03-12 2022-09-14 Clariant International Ltd Niedrigviskose funktionsflüssigkeitszusammensetzung
EP4130211A1 (de) 2021-08-02 2023-02-08 Clariant International Ltd Funktionale fluidzusammensetzung mit niedriger viskosität

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6195899B2 (ja) * 2012-03-23 2017-09-13 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ 振動緩衝装置のための流体組成物

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE939045C (de) * 1952-02-19 1956-02-16 Anorgana G M B H Hydraulische Fluessigkeiten
FR1233918A (fr) * 1958-08-27 1960-10-13 Shell Res Ltd Fluides hydrauliques

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5440978A (en) * 1977-09-06 1979-03-31 Nippon Nyukazai Co Ltd Additive agent for operation liquid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE939045C (de) * 1952-02-19 1956-02-16 Anorgana G M B H Hydraulische Fluessigkeiten
FR1233918A (fr) * 1958-08-27 1960-10-13 Shell Res Ltd Fluides hydrauliques

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053031A2 (en) * 2002-12-09 2004-06-24 Union Carbide Chemicals & Plastics Technology Cor Poration Alkoxylates as such or as base oils for hydraulic compositions
WO2004053031A3 (en) * 2002-12-09 2004-09-30 Union Carbide Chem Plastic Alkoxylates as such or as base oils for hydraulic compositions
WO2004081155A1 (de) * 2003-03-12 2004-09-23 Basf Aktiengesellschaft Dot 4-bremsflüssigkeiten
WO2014164087A1 (en) * 2013-03-12 2014-10-09 The Lubrizol Corporation Lubricating composition containing lewis acid reaction product
US9868919B2 (en) 2013-03-12 2018-01-16 The Lubrizol Corporation Lubricating composition containing lewis acid reaction product
EP3929269A1 (de) 2020-06-22 2021-12-29 Clariant International Ltd Funktionale fluidzusammensetzung mit niedriger viskosität
WO2021259514A1 (en) 2020-06-22 2021-12-30 Clariant International Ltd Low viscosity functional fluid composition
US12012569B2 (en) 2020-06-22 2024-06-18 Clariant International Ltd Low viscosity functional fluid composition
EP4056669A1 (de) 2021-03-12 2022-09-14 Clariant International Ltd Niedrigviskose funktionsflüssigkeitszusammensetzung
WO2022189047A1 (en) 2021-03-12 2022-09-15 Clariant International Ltd Low viscosity functional fluid composition
EP4130211A1 (de) 2021-08-02 2023-02-08 Clariant International Ltd Funktionale fluidzusammensetzung mit niedriger viskosität
WO2023011801A1 (en) 2021-08-02 2023-02-09 Clariant International Ltd Low viscosity functional fluid composition

Also Published As

Publication number Publication date
DE3470176D1 (en) 1988-05-05
JPH0458520B2 (de) 1992-09-17
IT1163547B (it) 1987-04-08
EP0129240B2 (de) 1994-06-01
JPS6013892A (ja) 1985-01-24
EP0129240B1 (de) 1988-03-30
IT8321698A0 (it) 1983-06-21

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