EP0013925B1 - Bremsflüssigkeit für Motorfahrzeuge - Google Patents

Bremsflüssigkeit für Motorfahrzeuge Download PDF

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Publication number
EP0013925B1
EP0013925B1 EP80100161A EP80100161A EP0013925B1 EP 0013925 B1 EP0013925 B1 EP 0013925B1 EP 80100161 A EP80100161 A EP 80100161A EP 80100161 A EP80100161 A EP 80100161A EP 0013925 B1 EP0013925 B1 EP 0013925B1
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Prior art keywords
weight
formula
alkyl
carbon atoms
integer
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EP80100161A
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German (de)
English (en)
French (fr)
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EP0013925A1 (de
Inventor
Wolfgang Knoblauch
Konrad Dr. Von Werner
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Hoechst AG
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Hoechst AG
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Priority to AT80100161T priority Critical patent/ATE2274T1/de
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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
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • 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
    • C10M2201/085—Phosphorus oxides, acids or salts
    • 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
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • 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
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/025—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with condensed rings
    • 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
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • 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
    • C10M2207/08—Aldehydes; Ketones
    • 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
    • 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
    • C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
    • 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
    • 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
    • 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
    • C10M2215/044—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms having cycloaliphatic groups
    • 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
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C10M2215/065—Phenyl-Naphthyl amines
    • 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
    • C10M2215/22—Heterocyclic nitrogen 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/221—Six-membered rings containing nitrogen and carbon only
    • 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
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/225—Heterocyclic nitrogen compounds the rings containing both nitrogen and oxygen
    • 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
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/225—Heterocyclic nitrogen compounds the rings containing both nitrogen and oxygen
    • C10M2215/226—Morpholines
    • 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
    • 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
    • C10M2215/30—Heterocyclic 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
    • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
    • C10M2219/108—Phenothiazine
    • 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate 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
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/042—Metal salts thereof
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • 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 invention relates to a brake fluid for motor vehicles.
  • brake fluids are to be particularly dry - Boiling point (reflux boiling point dry) and wet boiling point (reflux boiling point wet) and have a viscosity that changes little over a wide temperature range.
  • DE-B-1 768 933 describes a brake fluid for motor vehicles which consists of (a) 44 to 92% by weight of at least one boric acid ester of 1 to 2 mol of boric acid and 3 to 4 mol of oxalkylene glycol monoalkyl ether or of 1 mol of two up to hexavalent polyol, 2 to 6 mol boric acid and 4 to 12 mol oxalkylene glycol monoalkyl ether, (b) 0 to 20% by weight of at least one polyoxyalkylene glycol with a molecular weight of 150 to about 400 and (c) 3 to 50% by weight. % of at least one diluent, and additionally optionally contains 0.05 to 6% by weight of inhibitor and 0.001 to 1% by weight of antioxidant, percentages by weight in each case based on the weight of the liquid.
  • cyclic boric acid esters from 1 mol of a 1,2-, 2,3- or 1,3-alkylene glycol with 2 to 6 carbon atoms, 1 mol boric acid and 1 mol of an oxalkylene glycol or oxalkylene glycol monoalkyl ether are used described this boric acid ester for the preparation of brake fluids by mixing with oxalkylene glycol monoalkyl ethers as a diluent.
  • Brake fluids for motor vehicles are also known from DE-A-2 438 038.
  • boric acid esters made from oxalkylene glycols, oxalkylene glycol monoalkyl ethers and boric acid are recommended, which are mixed with oxalkylene glycol monoalkyl ethers and special higher molecular weight polyols as diluents or lubricants.
  • the new brake fluid should also meet both the DOT 3 and DOT 4 specifications in order to meet the various requirements in technical use.
  • the new brake fluid with components A) to E) consists of simple connections and meets the requirements mentioned at the outset to a surprisingly high degree.
  • R and R 1 , x and y can be the same or different.
  • the alkyl group R and R i can be straight-chain or branched, preferably it is straight-chain.
  • Preferred boric acid esters of the formula I are those in which R and R 1 are methyl, ethyl, propyl or butyl, and x and y are 2 or 3.
  • the preparation of the boric acid esters of formula 1 - a reaction product of orthoboric acid, diethylene glycol and an ethylene glycol monoalkyl ether suitable according to formula 11 in a molar ratio of 1: 1: 1 - is carried out according to known procedures.
  • the reaction components mentioned are reacted in a reaction vessel equipped with a stirrer and, if appropriate, a reflux condenser at a temperature of about 50 to about 150 ° C., preferably about 110 to about 140 ° C., with the water of reaction formed being continuously removed.
  • the reaction is expediently carried out in the presence of an inert solvent which forms an azeotrope with water, such as, for example, benzene, Tc.luol, xylene, ethylbenzene and the like.
  • the water of reaction can also be removed by carrying out the reaction under reduced pressure, for example in a water jet vacuum (7 to 20 mbar).
  • a water jet vacuum 7.0 to 20 mbar.
  • it is advantageous to take the ethylene glycol monoalkyl ether in excess that is to say to use the three reaction components mentioned preferably in molar amounts by weight of about 1: 1: 1.2 to 1: 1: 2.5.
  • the solvent which may be used is removed from the reaction product by customary distillation and, if further purification should be necessary, it is expediently vacuum-stripped at a temperature of 90 to 150 ° C. (pressure about 7 to 20 mbar).
  • the alkyl group R 2 can be straight-chain or branched, preferably it is straight-chain.
  • Preferred ethylene glycol monoalky! Ethers of the formula 11 are those in which R 2 is methyl, ethyl, propyl or butyl and n is 2 to 4.
  • a particularly preferred ethylene glycol monoalkyl ether according to formula II is methyl triethylene glycol CH 3 (OC 2 H 4 ) 3 OH.
  • the brake fluid according to the invention contains dialkyl polyalkylene glycols of the formula III in an amount of 5 to 10% by weight, based on the total weight of the fluid.
  • dialkyl polyalkylene glycols of the formula III contains dialkyl polyalkylene glycols of the formula III in an amount of 5 to 10% by weight, based on the total weight of the fluid.
  • the alkyl polyethylene glycol tert-butyl ethers have proven to be particularly suitable.
  • Alkyl polyethylene glycol tert-butyl ethers of the formula are preferably used in which R 3 is a straight-chain or branched alkyl radical having 1 to 4 carbon atoms and z is an integer from 2 to 10, preferably 2 to 5.
  • the compounds which are generally customary in the formulation of brake fluids can be used as inhibitor (component D), in particular of corrosion and oxidation (antioxidant).
  • the corrosion inhibitors are / 0, preferably from 2 to 8 wt .-% based on the total weight of the liquid usually used in an amount of 1 to 10 wt 0.
  • the antioxidants are generally used in an amount of from 0.01 to 2.0% by weight, preferably from 0.05 to 1.0% by weight, based on the total weight of the liquid.
  • the brake fluid according to the invention preferably contains 15 to 20% by weight of component A), 55 to 65% by weight of component B) and 3 to 8% by weight of component D), in each case based on the total weight the liquid.
  • Compounds of formula IV (component E) which can be used are polyethylene glycols, polypropylene glycols and polybutylene glycols.
  • the proportion of polyoxyalkylene glycols of the formula IV is 5 to 18% by weight, based on the total weight of the liquid.
  • the liquids according to the invention are produced by mixing the components together, for example in a container with a stirring element, as a result of which a homogeneous mixture is obtained in a simple manner.
  • the mixing is carried out at atmospheric pressure and at room temperature, it can optionally also be carried out at a higher temperature (30 to 50 ° C.), it being expedient to keep moisture away.
  • the example shows that the brake fluid according to the invention has outstanding properties in the decisive properties, namely viscosity, dry boiling point and wet boiling point.
  • the rubber swelling values that are particularly important for technical use are surprisingly good.

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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)
  • Lubricants (AREA)
  • Braking Arrangements (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP80100161A 1979-01-18 1980-01-14 Bremsflüssigkeit für Motorfahrzeuge Expired EP0013925B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100161T ATE2274T1 (de) 1979-01-18 1980-01-14 Bremsfluessigkeit fuer motorfahrzeuge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792901835 DE2901835A1 (de) 1979-01-18 1979-01-18 Hydraulische fluessigkeiten
DE2901835 1979-01-18

Publications (2)

Publication Number Publication Date
EP0013925A1 EP0013925A1 (de) 1980-08-06
EP0013925B1 true EP0013925B1 (de) 1983-01-19

Family

ID=6060845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100161A Expired EP0013925B1 (de) 1979-01-18 1980-01-14 Bremsflüssigkeit für Motorfahrzeuge

Country Status (8)

Country Link
EP (1) EP0013925B1 (ja)
JP (1) JPS5598296A (ja)
AT (1) ATE2274T1 (ja)
BR (1) BR8000298A (ja)
CA (1) CA1137071A (ja)
DE (2) DE2901835A1 (ja)
MX (1) MX154414A (ja)
ZA (1) ZA80291B (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2945094A1 (de) * 1979-11-08 1981-05-21 Hoechst Ag, 6000 Frankfurt Hydraulische fluessigkeit mit verbesserten eigenschaften
DE19918199A1 (de) 1999-04-22 2000-10-26 Basf Ag Hydraulische Flüssigkeiten, enthaltend cyclische Carbonsäurederivate
WO2010053641A1 (en) * 2008-11-07 2010-05-14 Dow Global Technologies Inc. Low viscosity functional fluids
CN109468158A (zh) * 2018-11-15 2019-03-15 湖北回天新材料股份有限公司 一种hzy4机动车辆制动液

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637794A (en) * 1967-04-13 1972-01-25 Olin Mathieson Borate esters prepared by successive reactions of boric acid with glycol monoethers and polyols
JPS5046584A (ja) * 1973-08-11 1975-04-25
DE2437936C2 (de) * 1974-08-07 1983-02-10 Basf Ag, 6700 Ludwigshafen Cyclische Ortho-Borsäureester und deren Verwendung als Bestandteil von Bremsflüssigkeiten

Also Published As

Publication number Publication date
ZA80291B (en) 1981-01-28
BR8000298A (pt) 1980-10-21
JPS6252798B2 (ja) 1987-11-06
CA1137071A (en) 1982-12-07
MX154414A (es) 1987-08-12
EP0013925A1 (de) 1980-08-06
DE3061647D1 (en) 1983-02-24
ATE2274T1 (de) 1983-02-15
DE2901835A1 (de) 1980-07-31
JPS5598296A (en) 1980-07-26

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