CN117448068A - Brake fluid for severe cold areas and preparation method thereof - Google Patents
Brake fluid for severe cold areas and preparation method thereof Download PDFInfo
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- CN117448068A CN117448068A CN202311418429.8A CN202311418429A CN117448068A CN 117448068 A CN117448068 A CN 117448068A CN 202311418429 A CN202311418429 A CN 202311418429A CN 117448068 A CN117448068 A CN 117448068A
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- triethylene glycol
- brake fluid
- butyl ether
- severe cold
- glycol butyl
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- 239000012530 fluid Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- COBPKKZHLDDMTB-UHFFFAOYSA-N 2-[2-(2-butoxyethoxy)ethoxy]ethanol Chemical compound CCCCOCCOCCOCCO COBPKKZHLDDMTB-UHFFFAOYSA-N 0.000 claims abstract description 51
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 230000002579 anti-swelling effect Effects 0.000 claims abstract description 7
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 7
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims abstract description 7
- 230000007797 corrosion Effects 0.000 claims abstract description 7
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000004327 boric acid Substances 0.000 claims abstract description 3
- -1 boric acid ester Chemical class 0.000 claims abstract description 3
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 24
- DSILSMIQUPKHSH-UHFFFAOYSA-N 2-[2-(2-methoxyethoxy)ethoxy]ethoxyboronic acid Chemical compound COCCOCCOCCOB(O)O DSILSMIQUPKHSH-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- ATDANDYRMPPEPJ-UHFFFAOYSA-N 2-[2-(2-butoxyethoxy)ethoxy]ethoxyboronic acid Chemical compound CCCCOCCOCCOCCOB(O)O ATDANDYRMPPEPJ-UHFFFAOYSA-N 0.000 claims description 13
- YOFPFYYTUIARDI-UHFFFAOYSA-N alpha-aminosuberic acid Chemical group OC(=O)C(N)CCCCCC(O)=O YOFPFYYTUIARDI-UHFFFAOYSA-N 0.000 claims description 12
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 12
- 239000012964 benzotriazole Substances 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010992 reflux Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- 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
- C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
-
- 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
- C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
- C10M2207/046—Hydroxy ethers
-
- 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
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-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
- 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
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention provides a brake fluid for severe cold regions and a preparation method thereof, and relates to the technical field of brake fluid. The brake fluid for the severe cold region comprises the following raw materials in parts by mass: 75-85 parts of boric acid ester, 5-15 parts of alcohol ether composition, 0.5-1 part of antioxidant, 0.5-1 part of metal corrosion inhibitor and 0.5-2 parts of anti-swelling agent. The alcohol ether composition is triethylene glycol butyl ether and modified triethylene glycol butyl ether according to the mass ratio of (10-13): (1-2). The brake fluid used in the severe cold region has the synergistic effect of all the raw materials, shows good low-temperature fluidity and excellent high-low temperature performance, and is suitable for the motor vehicle brake system in the cold region.
Description
Technical Field
The invention relates to the technical field of brake fluid, in particular to brake fluid for severe cold regions and a preparation method thereof.
Background
Brake fluid, also known as brake oil, is a fluid used in automotive hydraulic brake systems to transfer pressure. The GB12981-2012 standard specifies the low-temperature kinematic viscosity range of different levels of brake fluid at the temperature of minus 40 ℃, the value of the low-temperature kinematic viscosity range influences the flow property of the fluid, and the low viscosity is ensured to be normal in the brake system under the condition of cold temperature. The automobile brake fluid needs to have the lowest working temperature lower than the using temperature, and the purpose is to ensure that the piston can quickly react with the action of the brake pedal at low temperature, so that the normal use of automobile brake is satisfied. The brake fluid needs to ensure that good fluidity can be maintained when the temperature of the external conditions is low in severe cold regions (such as northeast regions of China), sudden accidents can be reduced or braked in time during running, unnecessary loss is reduced, and the running safety of people is ensured. Therefore, the preparation of the brake fluid for the severe cold region has great significance for the running safety of people in the severe cold region.
Disclosure of Invention
Based on the technical problems in the background technology, the invention provides a brake fluid for severe cold regions and a preparation method thereof.
The invention provides a brake fluid for severe cold regions, which comprises the following raw materials in parts by mass: 75-85 parts of boric acid ester, 5-15 parts of alcohol ether composition, 0.5-1 part of antioxidant, 0.5-1 part of metal corrosion inhibitor and 0.5-2 parts of anti-swelling agent.
Preferably, the alcohol ether composition is prepared from triethylene glycol butyl ether and modified triethylene glycol butyl ether according to the mass ratio of (10-13): (1-2).
More preferably, the preparation method of the modified triethylene glycol butyl ether comprises the following steps of:
s1, uniformly mixing triethylene glycol butyl ether and maleic anhydride grafts, performing hydrothermal reaction in a hydrothermal kettle, and cooling to room temperature to obtain a mixed solution;
s2, adding diethanolamine into the mixed solution in the step S1, introducing carbon dioxide and nitrogen into the hydrothermal kettle for reaction, maintaining for 1-2h, and releasing pressure to obtain the modified triethylene glycol butyl ether.
More preferably, the weight ratio of triethylene glycol butyl ether, maleic anhydride graft and diethanolamine is (5-8): (9-10): (2-3).
More preferably, in the step S1, the temperature of the hydrothermal reaction is 70-80 ℃ and the hydrothermal reaction time is 40-60min.
More preferably, in S2, the pressure ratio of carbon dioxide to nitrogen is (2-4): 1, a step of; the reaction temperature is 80-90 ℃.
Preferably, the borate is selected from one or more of triethylene glycol butyl ether borate and triethylene glycol methyl ether borate.
More preferably, the mass ratio of the triethylene glycol butyl ether borate to the triethylene glycol methyl ether borate is (0.1-1): (2-2.5).
Preferably, the antioxidant is selected from one or more of hydroquinone and bisphenol A.
Preferably, the metal corrosion inhibitor is selected from one or more of benzotriazole and borax.
Preferably, the anti-swelling agent is DL-2-amino suberic acid.
The invention also provides a preparation method of the brake fluid for the severe cold region, which comprises the following steps:
and heating and mixing the borate and alcohol ether composition uniformly, and then adding an antioxidant, a metal corrosion inhibitor and an anti-swelling agent, and heating and mixing uniformly to obtain the brake fluid for severe cold areas.
Preferably, the heating temperature is 40-60 ℃.
The invention has the beneficial effects that:
the brake fluid for severe cold areas provided by the invention is compounded by the borate, the alcohol ether composition and the additive, realizes better interaction as a whole, and shows good low-temperature fluidity and excellent high-low temperature performance. The invention adopts the borate to be selected from triethylene glycol butyl ether borate and triethylene glycol methyl ether borate for compounding use, and can ensure that the brake fluid has higher boiling point. The alcohol ether composition adopted by the invention consists of triethylene glycol butyl ether and modified triethylene glycol butyl ether, the triethylene glycol butyl ether is modified by adding maleic anhydride graft and diethanolamine, the diethanolamine and the triethylene glycol butyl ether are tightly combined by the maleic anhydride graft, and the low-temperature fluidity of the brake fluid is improved by changing the chemical structure of the triethylene glycol butyl ether. The brake fluid for severe cold areas prepared by the invention has good low-temperature fluidity and excellent high-low temperature performance, and is suitable for motor vehicle brake systems in cold areas.
Detailed Description
The technical scheme of the invention is described in detail through specific embodiments.
Example 1
The brake fluid for the severe cold region comprises the following raw materials in parts by mass: 23 parts of triethylene glycol butyl ether borate, 52 parts of triethylene glycol methyl ether borate, 10 parts of triethylene glycol butyl ether, 1 part of modified triethylene glycol butyl ether, 0.5 part of hydroquinone, 0.5 part of benzotriazole and 1 part of DL-2-amino suberic acid.
The preparation method of the modified triethylene glycol butyl ether comprises the following steps of:
s1, transferring triethylene glycol butyl ether and maleic anhydride grafts into a hydrothermal kettle, treating for 40min at 80 ℃, and cooling to room temperature to obtain a mixed solution;
s2, adding diethanolamine into the mixed solution in the step S1, and introducing the pressure ratio of 3 into a hydrothermal kettle: 1, enabling the pressure in the hydrothermal kettle to reach above 8MPa, keeping the temperature of the hydrothermal kettle at 85 ℃, maintaining the pressure for 2 hours, and releasing pressure to obtain modified triethylene glycol butyl ether; wherein, the weight ratio of triethylene glycol butyl ether to maleic anhydride graft to diethanolamine is 7:9:2.
a preparation method of brake fluid for severe cold regions comprises the following steps:
heating triethylene glycol butyl ether borate, triethylene glycol methyl ether borate, triethylene glycol butyl ether and modified triethylene glycol butyl ether at 60 ℃ for 20min, adding hydroquinone, benzotriazole and DL-2-amino suberic acid, heating at 45 ℃ for 40min, and uniformly mixing to obtain the brake fluid for severe cold regions.
Example 2
The brake fluid for the severe cold region comprises the following raw materials in parts by mass: 26 parts of triethylene glycol butyl ether borate, 59 parts of triethylene glycol methyl ether borate, 13 parts of triethylene glycol butyl ether, 2 parts of modified triethylene glycol butyl ether, 1 part of hydroquinone, 1 part of benzotriazole and 2 parts of DL-2-amino suberic acid.
The preparation method of the modified triethylene glycol butyl ether comprises the following steps of:
s1, transferring triethylene glycol butyl ether and maleic anhydride grafts into a hydrothermal kettle, treating for 40min at 80 ℃, and cooling to room temperature to obtain a mixed solution;
s2, adding diethanolamine into the mixed solution in the step S1, and introducing the pressure ratio of 3 into a hydrothermal kettle: 1, enabling the pressure in the hydrothermal kettle to reach above 8MPa, keeping the temperature of the hydrothermal kettle at 85 ℃, maintaining the pressure for 2 hours, and releasing pressure to obtain the modified triethylene glycol butyl ether.
A preparation method of brake fluid for severe cold regions comprises the following steps:
heating triethylene glycol butyl ether borate, triethylene glycol methyl ether borate, triethylene glycol butyl ether and modified triethylene glycol butyl ether at 60 ℃ for 20min, adding hydroquinone, benzotriazole and DL-2-amino suberic acid, heating at 45 ℃ for 40min, and uniformly mixing to obtain the brake fluid for severe cold regions.
Example 3
The brake fluid for the severe cold region comprises the following raw materials in parts by mass: 25 parts of triethylene glycol butyl ether borate, 55 parts of triethylene glycol methyl ether borate, 12 parts of triethylene glycol butyl ether, 1.5 parts of modified triethylene glycol butyl ether, 0.5 part of hydroquinone, 0.5 part of benzotriazole and 1 part of DL-2-amino suberic acid.
The preparation method of the modified triethylene glycol butyl ether comprises the following steps of:
s1, transferring triethylene glycol butyl ether and maleic anhydride grafts into a hydrothermal kettle, treating for 40min at 80 ℃, and cooling to room temperature to obtain a mixed solution;
s2, adding diethanolamine into the mixed solution in the step S1, and introducing the pressure ratio of 3 into a hydrothermal kettle: 1, enabling the pressure in the hydrothermal kettle to reach above 8MPa, keeping the temperature of the hydrothermal kettle at 85 ℃, maintaining the pressure for 2 hours, and releasing pressure to obtain the modified triethylene glycol butyl ether.
A preparation method of brake fluid for severe cold regions comprises the following steps:
heating triethylene glycol butyl ether borate, triethylene glycol methyl ether borate, triethylene glycol butyl ether and modified triethylene glycol butyl ether at 60 ℃ for 20min, adding hydroquinone, benzotriazole and DL-2-amino suberic acid, heating at 45 ℃ for 40min, and uniformly mixing to obtain the brake fluid for severe cold regions.
Comparative example 1
The brake fluid comprises the following raw materials in parts by mass: 25 parts of triethylene glycol butyl ether borate, 55 parts of triethylene glycol methyl ether borate, 14 parts of triethylene glycol butyl ether, 0.5 part of hydroquinone, 0.5 part of benzotriazole and 1 part of DL-2-amino suberic acid.
A preparation method of brake fluid comprises the following steps:
heating triethylene glycol butyl ether borate, triethylene glycol methyl ether borate and triethylene glycol butyl ether at 60 ℃ for 20min, adding hydroquinone, benzotriazole and DL-2-amino suberic acid, heating at 45 ℃ for 40min, and uniformly mixing to obtain the brake fluid.
Comparative example 2
The brake fluid comprises the following raw materials in parts by mass: 80 parts of triethylene glycol methyl ether borate, 12 parts of triethylene glycol butyl ether, 1.5 parts of modified triethylene glycol butyl ether, 0.5 part of hydroquinone, 0.5 part of benzotriazole and 1 part of DL-2-amino suberic acid.
The preparation method of the modified triethylene glycol butyl ether comprises the following steps of:
s1, transferring triethylene glycol butyl ether and maleic anhydride grafts into a hydrothermal kettle, treating for 40min at 80 ℃, and cooling to room temperature to obtain a mixed solution;
s2, adding diethanolamine into the mixed solution in the step S1, and introducing the pressure ratio of 3 into a hydrothermal kettle: 1, enabling the pressure in the hydrothermal kettle to reach above 8MPa, keeping the temperature of the hydrothermal kettle at 85 ℃, maintaining the pressure for 2 hours, and releasing pressure to obtain the modified triethylene glycol butyl ether.
A preparation method of brake fluid comprises the following steps:
heating triethylene glycol methyl ether borate, triethylene glycol butyl ether and modified triethylene glycol butyl ether at 60 ℃ for 20min, adding hydroquinone, benzotriazole and DL-2-amino suberic acid, heating at 45 ℃ for 40min, and uniformly mixing to obtain the brake fluid.
The brake fluids prepared in examples 1-3 and comparative examples 1-2 were tested for equilibrium reflux boiling point, wet equilibrium reflux boiling point and kinematic viscosity at-40 ℃ according to the GB12981-2012 standard, and the test results are shown in Table 1.
Table 1 data for performance testing of brake fluids for examples and comparative examples
As can be seen from Table 1, the brake fluid for severe cold regions prepared in examples 1 to 3 of the present invention has an kinematic viscosity of not more than 700mm at-40 ℃ 2 The brake fluid for severe cold areas prepared by the method has good low-temperature fluidity, and is suitable for motor vehicle brake systems in cold areas; the brake fluid for severe cold areas prepared by the method disclosed by the invention has higher equilibrium reflux boiling point and wet equilibrium reflux boiling point, which shows that the brake fluid for severe cold areas prepared by the method disclosed by the invention has excellent high-low temperature performance. Compared with the embodiment, the comparative example 1 has the advantages that the kinematic viscosity of the brake fluid without the modified triethylene glycol butyl ether at the temperature of minus 40 ℃ is obviously improved, so that the fluidity of the brake fluid is reduced under the cold condition, and the normal operation of a brake system is influenced; comparative example 2 triethylene glycol methyl ether borate alone, although having good low temperature fluidity, had relatively lower equilibrium reflux boiling point and wet equilibrium reflux boiling point than the examples.
In conclusion, the brake fluid for the severe cold region provided by the invention has good low-temperature fluidity and excellent high-low temperature performance, and is suitable for a motor vehicle brake system in the cold region.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. The brake fluid for the severe cold region is characterized by comprising the following raw materials in parts by mass: 75-85 parts of boric acid ester, 5-15 parts of alcohol ether composition, 0.5-1 part of antioxidant, 0.5-1 part of metal corrosion inhibitor and 0.5-2 parts of anti-swelling agent; the alcohol ether composition is prepared from triethylene glycol butyl ether and modified triethylene glycol butyl ether according to the mass ratio of (10-13): (1-2).
2. The brake fluid for severe cold regions according to claim 1, wherein the preparation method of the modified triethylene glycol butyl ether comprises the following steps:
s1, uniformly mixing triethylene glycol butyl ether and maleic anhydride grafts, performing hydrothermal reaction in a hydrothermal kettle, and cooling to room temperature to obtain a mixed solution;
s2, adding diethanolamine into the mixed solution in the step S1, introducing carbon dioxide and nitrogen into the hydrothermal kettle for reaction, maintaining for 1-2h, and releasing pressure to obtain the modified triethylene glycol butyl ether.
3. The brake fluid for severe cold regions according to claim 2, wherein the weight ratio of triethylene glycol butyl ether, maleic anhydride graft and diethanolamine is (5-8): (9-10): (2-3).
4. The brake fluid for severe cold regions according to claim 2, wherein the hydrothermal reaction temperature in S1 is 70-80 ℃ and the hydrothermal reaction time is 40-60min.
5. The brake fluid for severe cold regions according to claim 2, wherein the pressure ratio of carbon dioxide to nitrogen in S2 is (2-4): 1, a step of; the reaction temperature is 80-90 ℃.
6. The brake fluid for severe cold regions according to claim 1, wherein the borate is one or more selected from the group consisting of triethylene glycol butyl ether borate and triethylene glycol methyl ether borate.
7. The brake fluid for severe cold regions according to claim 6, wherein the mass ratio of the triethylene glycol butyl ether borate to the triethylene glycol methyl ether borate is (0.1-1): (2-2.5).
8. The brake fluid for severe cold regions according to claim 1, wherein the antioxidant is one or more selected from hydroquinone and bisphenol a; the metal corrosion inhibitor is selected from one or more of benzotriazole and borax; the anti-swelling agent is DL-2-amino suberic acid.
9. The method for preparing a brake fluid for severe cold regions according to any one of claims 1 to 8, comprising the steps of: and heating and mixing the borate and alcohol ether composition uniformly, and then adding an antioxidant, a metal corrosion inhibitor and an anti-swelling agent, and heating and mixing uniformly to obtain the brake fluid for severe cold areas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418429.8A CN117448068A (en) | 2023-10-30 | 2023-10-30 | Brake fluid for severe cold areas and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418429.8A CN117448068A (en) | 2023-10-30 | 2023-10-30 | Brake fluid for severe cold areas and preparation method thereof |
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| CN117448068A true CN117448068A (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311418429.8A Pending CN117448068A (en) | 2023-10-30 | 2023-10-30 | Brake fluid for severe cold areas and preparation method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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