Composition for preparing cooling liquid, cooling liquid as well as preparation method and application of cooling liquid

Abstract

The invention relates to the technical field of cooling liquid, and discloses a composition for preparing the cooling liquid, the cooling liquid as well as a preparation method and application of the cooling liquid. 45 to 55 parts by weight of water; 1-2 parts by weight of a low ionization degree organic acid corrosion inhibitor; 0.5 to 1 part by weight of an azole compound; 0.2 to 0.7 part by weight of an ion trapping agent; 0.1 to 0.5 part by weight of an amine pH regulator; 0.3 to 0.8 part by weight of a chalcone derivative; and 0.5 to 1.2 parts by weight of a nonionic azo ligand compound. The cooling liquid has low conductivity and also maintains excellent corrosion inhibition capability.

Description

Technical Field

[0001] The invention relates to the technical field of coolants, and in particular to a composition for preparing a coolant, a coolant, a preparation method thereof and applications thereof. Background Art

[0002] As global climate change and environmental pollution become increasingly serious, electric vehicles (EVs) are rapidly gaining popularity around the world as an important way to reduce carbon emissions in the transportation sector. However, with the continuous improvement of electric vehicle performance, especially the increase in battery energy density and motor power, thermal management issues have become increasingly prominent, becoming a bottleneck restricting the performance and safety of electric vehicles.

[0003] Although traditional coolants perform well in internal combustion engine vehicles, they have many limitations in electric vehicles. Limitations of conductivity control: Existing coolants usually improve their corrosion inhibition ability by adding ionic corrosion inhibitors and electrolytes. These additives will significantly increase the conductivity of the coolant. However, due to the higher degree of electrification of electric vehicles, there are more stringent requirements for the conductivity of coolants to avoid electrical system short circuits and electromagnetic interference. Limitations of corrosion inhibition: Traditional single corrosion inhibitors (such as nitrates and phosphates) have certain limitations in corrosion prevention, especially in applications targeting multiple metals (such as aluminum, copper and steel). Insufficient stability: Many coolants in the existing technology may decompose, precipitate or other unstable phenomena in high temperature environments. These problems will cause the performance of the coolant to deteriorate, affecting the cooling effect and the overall reliability of the system.

[0004] Therefore, those skilled in the art provide a new energy electric vehicle coolant and a preparation method thereof to solve the problems raised in the above background. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art, namely, high electrical conductivity of the coolant, single corrosion inhibition effect and insufficient stability, and to provide a composition for preparing a coolant, a coolant and a preparation method and application thereof, wherein the coolant has low electrical conductivity while maintaining excellent corrosion inhibition ability.

[0006] In order to achieve the above object, the first aspect of the present invention provides a composition for preparing a coolant, wherein, by weight, the composition comprises:

[0007] Antifreeze: 45-55 parts by weight;

[0008] Water: 45-55 parts by weight;

[0009] Low ionization degree organic acid corrosion inhibitor: 1-2 parts by weight;

[0010] Azole compound: 0.5-1 parts by weight;

[0011] Ion capture agent: 0.2-0.7 parts by weight;

[0012] Amine pH regulator: 0.1-0.5 parts by weight;

[0013] Chalcone derivative: 0.3-0.8 parts by weight;

[0014] Nonionic azo ligand compound: 0.5-1.2 parts by weight.

[0015] The second aspect of the present invention provides a method for preparing a coolant using the aforementioned composition for preparing a coolant, wherein the method comprises:

[0016] (1) contacting and mixing an antifreeze agent, deionized water, a low-ionization organic acid corrosion inhibitor, an azole compound, a chalcone derivative, a nonionic azo ligand compound, an optional anti-scaling stabilizer, an optional antioxidant, an ion scavenger, and an optional anti-foaming agent to obtain a mixed solution;

[0017] (2) stirring and mixing the mixed solution and the amine pH adjuster;

[0018] (3) degassing the mixed solution obtained in step (2) to obtain a foam-free solution;

[0019] (4) filtering the foam-free solution to obtain a cooling liquid.

[0020] A third aspect of the present invention provides a cooling liquid prepared by the above-mentioned method.

[0021] A fourth aspect of the present invention provides an application of the aforementioned coolant in a new energy electric vehicle.

[0022] Through the above technical solution, the coolant of the present invention achieves low electrical conductivity while also maintaining excellent corrosion inhibition ability. DETAILED DESCRIPTION

[0023] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0024] As mentioned above, the first aspect of the present invention provides a composition for preparing a coolant, wherein, by weight, the composition comprises:

[0025] Antifreeze: 45-55 parts by weight;

[0026] Water: 45-55 parts by weight;

[0027] Low ionization degree organic acid corrosion inhibitor: 1-2 parts by weight;

[0028] Azole compound: 0.5-1 parts by weight;

[0029] Ion capture agent: 0.2-0.7 parts by weight;

[0030] Amine pH regulator: 0.1-0.5 parts by weight;

[0031] Chalcone derivative: 0.3-0.8 parts by weight;

[0032] Nonionic azo ligand compound: 0.5-1.2 parts by weight.

[0033] The inventors of the present invention have found that by using a low-ionization organic acid corrosion inhibitor and an amine pH adjuster, and introducing an ion capture agent and an azole compound, the coolant can achieve low conductivity while also maintaining excellent corrosion inhibition ability.

[0034] Furthermore, chalcone derivatives are introduced into the system. The keto functional group in the substance can react with metal ions to form a stable complex. This complex reaction can significantly reduce the activity of metal ions and reduce their reaction with corrosive media, thereby preventing corrosion.

[0035] Furthermore, a non-ionic azo ligand compound is introduced into the system. The azo (-N=N-) group in the substance has a strong coordination ability and can form a stable complex with metal ions, which can isolate the metal surface from the contact with the corrosive medium, thereby reducing the corrosion rate.

[0036] According to the present invention, preferably, the composition comprises:

[0037] Antifreeze: 52-55 parts by weight;

[0038] Water: 45-48 parts by weight;

[0039] Low ionization degree organic acid corrosion inhibitor: 1.8-2 parts by weight;

[0040] Azole compound: 0.9-1 parts by weight;

[0041] Ion capture agent: 0.6-0.7 parts by weight;

[0042] Amine pH regulator: 0.4-0.5 parts by weight;

[0043] Chalcone derivative: 0.7-0.8 parts by weight;

[0044] Nonionic azo ligand compound: 1-1.2 parts by weight.

[0045] According to the present invention, preferably, the composition further comprises:

[0046] Anti-scaling stabilizer: 0.02-0.05 parts by weight;

[0047] Antioxidant: 0.03-0.08 parts by weight;

[0048] Antifoaming agent: 0.05-0.08 parts by weight.

[0049] According to the present invention, more preferably, the composition further comprises:

[0050] Anti-scaling stabilizer: 0.04-0.05 parts by weight;

[0051] Antioxidant: 0.06-0.08 parts by weight;

[0052] Antifoaming agent: 0.07-0.08 parts by weight.

[0053] According to the present invention, the antifreeze agent is ethylene glycol.

[0054] According to the present invention, the water is preferably deionized water, and more preferably, the conductivity of the deionized water is less than 0.5 μS / cm.

[0055] According to the present invention, the low ionization degree organic acid corrosion inhibitor is selected from one or more of dodecanedioic acid, decenoic acid, linoleic acid, p-tert-butylbenzoic acid and octanoic acid.

[0056] According to the present invention, the azole compound is selected from one or more of oxadiazole, benzotriazole, methylbenzotriazole, 1,2,4-triazole, 1,2,3-triazole and 3-amino-1,2,4-triazole.

[0057] According to the present invention, the ion capture agent is selected from one or more of polyethylene imine, polyacrylic acid, nitrilotriacetic acid and polyethylene glycol diamine.

[0058] According to the present invention, the amine pH regulator is selected from one or more of triethylamine, dimethylethanolamine, morpholine and triethanolamine.

[0059] According to the present invention, the chalcone derivative is selected from one or more of formyl chalcone, amino chalcone, 4'-hydroxy chalcone, acetyl chalcone and 4'-methoxy chalcone.

[0060] According to the present invention, the nonionic azo ligand compound is selected from one or more of 4,4'-diaminoazobenzene, 4-hydroxyazobenzene, azoquinoline, azoanthraquinone and azobenzene-4-sulfonic acid.

[0061] According to the present invention, the anti-fouling stabilizer is selected from one or more of polyacrylic acid-maleic anhydride copolymer, polyacrylic acid-vinyl sulfonic acid copolymer, polyvinyl alcohol-polyacrylic acid copolymer and polyacrylic acid-acrylamide copolymer.

[0062] According to the present invention, the antioxidant is selected from one or more of polyethylene oxide, polypropylene oxide, diisostearyl dilaurate, behenylphenol and 2,4-di-tert-butyl-p-chlorophenol.

[0063] According to the present invention, the anti-foaming agent is selected from one or more of polyethylene glycol, fatty alcohol polyoxyethylene ether, polydimethylsiloxane and ethoxylated fatty acid ester.

[0064] The second aspect of the present invention provides a method for preparing a coolant using the aforementioned composition for preparing a coolant, wherein the method comprises:

[0065] (1) contacting and mixing an antifreeze agent, deionized water, a low-ionization organic acid corrosion inhibitor, an azole compound, a chalcone derivative, a nonionic azo ligand compound, an optional anti-scaling stabilizer, an optional antioxidant, an ion scavenger, and an optional anti-foaming agent to obtain a mixed solution;

[0066] (2) stirring and mixing the mixed solution and the amine pH adjuster;

[0067] (3) degassing the mixed solution obtained in step (2) to obtain a foam-free solution;

[0068] (4) filtering the foam-free solution to obtain a cooling liquid.

[0069] According to the present invention, in step (1), the mixing conditions include: stirring and shearing dispersion at a speed of 3000-5000 rpm for 0.2-1 hour to obtain a mixed solution.

[0070] According to the present invention, in step (3), the conditions for the degassing treatment include: performing continuous degassing at a speed of 1000-1500 rpm for 0.1-0.5 hours to obtain a foam-free solution.

[0071] A third aspect of the present invention provides a cooling liquid prepared by the above-mentioned method.

[0072] According to the present invention, the conductivity of the coolant at a temperature of 25° C. is 10-100 μS / cm, preferably 30-50 μS / cm.

[0073] According to the present invention, the mass change of the heat transfer corrosion of the cast aluminum alloy of the coolant is ±1 mg / cm 2 , preferably ±0.2mg / cm 2 .

[0074] According to the present invention, the cooling liquid has a foam volume of ≤80 mL and a foam disappearance time of ≤3 s at a temperature of 30°C±1°C.

[0075] According to the present invention, the coolant has a foam volume of ≤50 mL and a foam disappearance time of ≤1 s at a temperature of 80°C±1°C.

[0076] According to the present invention, the coolant is subjected to static corrosion at 80°C ± 2°C for 336h ± 2h, wherein the mass change of the copper is ± 5mg / cm 2 , the mass change of brass is ±3mg / cm 2 , the mass change of steel is ±3mg / cm 2 , the mass change of ZL101A cast aluminum is ±2mg / cm 2 , the mass change of 3003 aluminum is ±1mg / cm 2 , the mass change of 4043 aluminum is ±1mg / cm 2 , the mass change of 6063 aluminum is ±2mg / cm 2 .

[0077] A fourth aspect of the present invention provides an application of the aforementioned coolant in a new energy electric vehicle.

[0078] According to a particularly preferred embodiment of the present invention, a method for preparing a low-conductivity coolant for a new energy electric vehicle comprises the following steps:

[0079] (1) adding antifreeze, deionized water, low-ionization organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent into a batching kettle, stirring and shearing at a speed of 3000-5000 rpm for 0.2-1 hour to obtain a mixed solution;

[0080] (2) stirring and mixing the mixed solution obtained in step (1) and the amine pH adjuster, and adjusting the pH value of the mixed solution to 7-10;

[0081] (3) placing the mixed solution obtained in step (2) in a continuous degassing machine and performing continuous degassing at a speed of 1000-1500 rpm for 0.1-0.5 hours to obtain a foam-free solution;

[0082] (4) The foam-free solution obtained in step (3) is passed through a 0.1-0.5 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0083] The present invention will be described in detail below through examples.

[0084] The test standard of conductivity is measured according to GB29743.2 Appendix A Electric Vehicle Coolant Conductivity Test Method;

[0085] The foam volume and foam disappearance time test standards are measured according to SH / T 0066 method;

[0086] The static corrosion parameters are measured by the static corrosion test method for electric vehicle coolant in Appendix B of GB 29743.2;

[0087] The heat transfer corrosion test standard of cast aluminum alloy is measured according to the SH / T 0620 test method;

[0088] In the present invention, it should be noted that "parts" are equivalent to "parts by weight".

[0089] Example 1

[0090] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0091] The composition for preparing the cooling liquid comprises:

[0092] In terms of mass, the following ingredients include 45 parts of antifreeze agent (ethylene glycol), 55 parts of deionized water, 1.3 parts of low ionization organic acid corrosion inhibitor (dodecanedioic acid), 0.6 parts of azole compound (isoquinoxaline), 0.4 parts of chalcone derivative (formyl chalcone), 0.6 parts of non-ionic azo ligand compound (4,4'-diaminoazobenzene), 0.03 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.04 parts of antioxidant (polyethylene oxide), 0.3 parts of ion scavenger (polyethylene imine), 0.2 parts of amine pH adjuster (triethylamine) and 0.06 parts of anti-foaming agent (polyethylene glycol).

[0093] The method for preparing a coolant using the aforementioned composition comprises:

[0094] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at 3000 rpm for 0.2 hour to obtain a mixed solution;

[0095] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 7;

[0096] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1000 rpm for 0.1 hour to obtain a foam-free solution;

[0097] (4) The resulting foam-free solution is passed through a 0.5 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0098] Example 2

[0099] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0100] The composition for preparing the cooling liquid comprises:

[0101] In terms of mass, the ingredients include 47 parts of antifreeze agent (ethylene glycol), 53 parts of deionized water, 1.4 parts of low ionization organic acid corrosion inhibitor (decenoic acid), 0.65 parts of azole compound (benzotriazole), 0.5 parts of chalcone derivative (aminochalcone), 0.7 parts of non-ionic azo ligand compound (4-hydroxyazobenzene), 0.03 parts of anti-scaling stabilizer (polyacrylic acid-vinyl sulfonic acid copolymer), 0.045 parts of antioxidant (polypropylene oxide), 0.4 parts of ion capture agent (polyacrylic acid), 0.25 parts of amine pH adjuster (dimethylethanolamine), and 0.06 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0102] The method for preparing a coolant using the aforementioned composition comprises:

[0103] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at a speed of 4000 rpm for 0.3 hour to obtain a mixed solution;

[0104] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 7.5;

[0105] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1200 rpm for 0.2 hours to obtain a foam-free solution;

[0106] (4) The resulting foam-free solution is passed through a 0.4 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0107] Example 3

[0108] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0109] The composition for preparing the cooling liquid comprises:

[0110] In terms of mass, the ingredients include 50 parts of antifreeze agent (ethylene glycol), 50 parts of deionized water, 1.5 parts of low ionization organic acid corrosion inhibitor (linoleic acid), 0.7 parts of azole compound (1,2,4-triazole), 0.6 parts of chalcone derivative (4'-hydroxychalcone), 0.8 parts of non-ionic azo ligand compound (azoquinoline), 0.03 parts of anti-scaling stabilizer (polyvinyl alcohol-polyacrylic acid copolymer), 0.05 parts of antioxidant (diisostearyl dilaurate), 0.6 parts of ion capture agent (nitrilotriacetic acid), 0.3 parts of amine pH adjuster (morpholine), and 0.06 parts of anti-foaming agent (polydimethylsiloxane).

[0111] The method for preparing a coolant using the aforementioned composition comprises:

[0112] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at 4500 rpm for 0.5 hour to obtain a mixed solution;

[0113] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 8.7;

[0114] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1250 rpm for 0.3 hours to obtain a foam-free solution;

[0115] (4) The resulting foam-free solution is passed through a 0.3 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0116] Example 4

[0117] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0118] The composition for preparing the cooling liquid comprises:

[0119] In terms of mass, the ingredients include 52 parts of antifreeze agent (ethylene glycol), 48 parts of deionized water, 1.8 parts of low ionization organic acid corrosion inhibitor (tert-butylbenzoic acid), 0.9 parts of azole compound (1,2,3-triazole), 0.7 parts of chalcone derivative (acetyl chalcone), 1 part of non-ionic azo ligand compound (azoanthraquinone), 0.04 parts of anti-scaling stabilizer (polyacrylic acid-acrylamide copolymer), 0.06 parts of antioxidant (dodecylphenol), 0.6 parts of ion scavenger (polyethylene glycol diamine), 0.4 parts of amine pH adjuster (triethanolamine), and 0.07 parts of anti-foaming agent (ethoxylated fatty acid ester).

[0120] The method for preparing a coolant using the aforementioned composition comprises:

[0121] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at a speed of 5000 rpm for 0.8 hours to obtain a mixed solution;

[0122] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 8.5;

[0123] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1400 rpm for 0.5 hours to obtain a foam-free solution;

[0124] (4) The resulting foam-free solution is passed through a 0.1 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0125] Example 5

[0126] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0127] The composition for preparing the cooling liquid comprises:

[0128] In terms of mass, the following ingredients include 55 parts of antifreeze agent (ethylene glycol), 45 parts of deionized water, 2 parts of low ionization organic acid corrosion inhibitor (octanoic acid), 1 part of azole compound (3-amino-1,2,4-triazole), 0.8 parts of chalcone derivative (4'-methoxychalcone), 1.2 parts of non-ionic azo ligand compound (azobenzene-4-sulfonic acid), 0.05 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.08 parts of antioxidant (2,4-di-tert-butyl-p-chlorophenol), 0.7 parts of ion capture agent (polyacrylic acid), 0.5 parts of amine pH adjuster (dimethylethanolamine), and 0.08 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0129] The method for preparing a coolant using the aforementioned composition comprises:

[0130] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at a speed of 5000 rpm for 1 hour to obtain a mixed solution;

[0131] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 9.3;

[0132] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1500 rpm for 0.5 hours to obtain a foam-free solution;

[0133] (4) The resulting foam-free solution is passed through a 0.1 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0134] Example 6

[0135] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0136] The composition for preparing the cooling liquid comprises:

[0137] In terms of mass, the following ingredients include 46 parts of antifreeze agent (ethylene glycol), 54 parts of deionized water, 1 part of low ionization organic acid corrosion inhibitor (decenoic acid), 0.5 parts of azole compound (3-amino-1,2,4-triazole), 0.3 parts of chalcone derivative (4'-hydroxychalcone), 0.5 parts of non-ionic azo ligand compound (4,4'-diaminoazobenzene), 0.02 parts of anti-scaling stabilizer (polyacrylic acid-acrylamide copolymer), 0.03 parts of antioxidant (polyethylene oxide), 0.2 parts of ion scavenger (polyethylene glycol diamine), 0.1 parts of amine pH adjuster (morpholine), and 0.05 parts of anti-foaming agent (polyethylene glycol).

[0138] The method for preparing a coolant using the aforementioned composition comprises:

[0139] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at 3800 rpm for 0.25 hours to obtain a mixed solution;

[0140] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 7.7;

[0141] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1100 rpm for 0.15 hours to obtain a foam-free solution;

[0142] (4) The resulting foam-free solution is passed through a 0.5 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0143] Example 7

[0144] This example is to illustrate a coolant prepared by using the composition for preparing a coolant of the present invention.

[0145] The composition for preparing the cooling liquid comprises:

[0146] In terms of mass, the ingredients include 53 parts of antifreeze agent (ethylene glycol), 47 parts of deionized water, 1.2 parts of low ionization organic acid corrosion inhibitor (tert-butylbenzoic acid), 0.55 parts of azole compound (isoquinoxaline), 0.35 parts of chalcone derivative (aminochalcone), 0.55 parts of non-ionic azo ligand compound (azobenzene-4-sulfonic acid), 0.028 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.035 parts of antioxidant (diisostearyl dilaurate), 0.25 parts of ion scavenger (polyacrylic acid), 0.18 parts of amine pH adjuster (triethylamine), and 0.05 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0147] The method for preparing a coolant using the aforementioned composition comprises:

[0148] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at 4200 rpm for 0.35 hours to obtain a mixed solution;

[0149] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 10;

[0150] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1300 rpm for 0.25 hours to obtain a foam-free solution;

[0151] (4) The resulting foam-free solution is passed through a 0.4 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0152] Comparative Example 1

[0153] A commercially available coolant is used, wherein the commercially available coolant comprises the following components and the component contents: 50% ethylene glycol, 50% deionized water, 0.3% triethanolamine, 0.1% benzotriazole and 0.5% 2-ethylhexanoic acid.

[0154] Comparative Example 2

[0155] The composition for preparing the cooling liquid comprises:

[0156] In terms of mass, the following ingredients include 55 parts of antifreeze agent (ethylene glycol), 45 parts of deionized water, 2 parts of low ionization organic acid corrosion inhibitor (octanoic acid), 1 part of azole compound (3-amino-1,2,4-triazole), 0.8 parts of chalcone derivative (4'-methoxychalcone), 1.2 parts of non-ionic azo ligand compound (azobenzene-4-sulfonic acid), 0.05 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.08 parts of antioxidant (2,4-di-tert-butyl-p-chlorophenol), 0.5 parts of amine pH adjuster (dimethylethanolamine), and 0.08 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0157] The method for preparing a coolant using the aforementioned composition comprises:

[0158] (1) first, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, and antioxidant are added into a batching kettle, and stirred and sheared at a speed of 5000 rpm for 1 hour to obtain a mixed solution;

[0159] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 9.3;

[0160] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1500 rpm for 0.5 hours to obtain a foam-free solution;

[0161] (4) The resulting foam-free solution is passed through a 0.1 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0162] Comparative Example 3

[0163] The composition for preparing the cooling liquid comprises:

[0164] In terms of mass, the ingredients include 55 parts of antifreeze agent (ethylene glycol), 45 parts of deionized water, 2 parts of low ionization organic acid corrosion inhibitor (octanoic acid), 1 part of azole compound (3-amino-1,2,4-triazole), 1.2 parts of non-ionic azo ligand compound (azobenzene-4-sulfonic acid), 0.05 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.08 parts of antioxidant (2,4-di-tert-butyl-p-chlorophenol), 0.7 parts of ion scavenger (polyacrylic acid), 0.5 parts of amine pH adjuster (dimethylethanolamine), and 0.08 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0165] The method for preparing a coolant using the aforementioned composition comprises:

[0166] (1) firstly, antifreeze agent, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at a speed of 5000 rpm for 1 hour to obtain a mixed solution;

[0167] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 9.3;

[0168] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1500 rpm for 0.5 hours to obtain a foam-free solution;

[0169] (4) The resulting foam-free solution is passed through a 0.1 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0170] Comparative Example 4

[0171] The composition for preparing the cooling liquid comprises:

[0172] In terms of mass, the following ingredients include 55 parts of antifreeze agent (ethylene glycol), 45 parts of deionized water, 4 parts of low ionization organic acid corrosion inhibitor (octanoic acid), 1 part of azole compound (3-amino-1,2,4-triazole), 0.8 parts of chalcone derivative (4'-methoxychalcone), 1.2 parts of non-ionic azo ligand compound (azobenzene-4-sulfonic acid), 0.05 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.08 parts of antioxidant (2,4-di-tert-butyl-p-chlorophenol), 0.7 parts of ion scavenger (polyacrylic acid), 0.5 parts of amine pH adjuster (dimethylethanolamine), and 0.08 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0173] The method for preparing a coolant using the aforementioned composition comprises:

[0174] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at a speed of 5000 rpm for 1 hour to obtain a mixed solution;

[0175] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 9.3;

[0176] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1500 rpm for 0.5 hours to obtain a foam-free solution;

[0177] (4) The resulting foam-free solution is passed through a 0.1 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0178] Comparative Example 5

[0179] The composition for preparing the cooling liquid comprises:

[0180] In terms of mass, the following ingredients include 55 parts of antifreeze agent (ethylene glycol), 45 parts of deionized water, 2 parts of low ionization organic acid corrosion inhibitor (octanoic acid), 1 part of azole compound (3-amino-1,2,4-triazole), 0.8 parts of chalcone derivative (4'-methoxychalcone), 1.2 parts of non-ionic azo ligand compound (azobenzene-4-sulfonic acid), 0.01 parts of anti-scaling stabilizer (polyacrylic acid-maleic anhydride copolymer), 0.08 parts of antioxidant (2,4-di-tert-butyl-p-chlorophenol), 0.7 parts of ion scavenger (polyacrylic acid), 0.5 parts of amine pH adjuster (dimethylethanolamine), and 0.08 parts of anti-foaming agent (fatty alcohol polyoxyethylene ether).

[0181] The method for preparing a coolant using the aforementioned composition comprises:

[0182] (1) firstly, antifreeze, deionized water, low ionization degree organic acid corrosion inhibitor, azole compound, chalcone derivative, nonionic azo ligand compound, anti-scaling stabilizer, antioxidant, ion scavenger and anti-foaming agent are added into a batching kettle, and stirred and sheared at a speed of 5000 rpm for 1 hour to obtain a mixed solution;

[0183] (2) then stirring the mixed solution and the amine pH adjuster to adjust the pH to 9.3;

[0184] (3) placing the mixed solution in a continuous degassing machine and performing continuous degassing at a speed of 1500 rpm for 0.5 hours to obtain a foam-free solution;

[0185] (4) The resulting foam-free solution is passed through a 0.1 μm microporous filter to obtain a pure and uniform low-conductivity coolant.

[0186] Test Case

[0187] The coolants prepared in the above-mentioned Examples 1-7 and Comparative Examples 1-5 were tested respectively, and the results are shown in Table 1 and Table 1 (Continued).

[0188] Table 1

[0189]

[0190] Note: "A" in Table 1 means no obvious change in color, no precipitation or suspended matter.

[0191] Table 1 (continued)

[0192]

[0193] Note: In Table 1 (Continued), "A" indicates no obvious change in color, no precipitation or suspended matter; "B" indicates trace amounts of precipitation.

[0194] It can be seen from the results of Table 1 and Table 1 (continued) that the coolant prepared by using the coolant composition of the present invention has low conductivity while maintaining excellent corrosion inhibition ability; the conductivity and corrosion inhibition ability are better than those of the commercially available comparative example 1; the comparative example 2 is unqualified due to the fact that the coolant composition does not contain an ion capture agent, so the conductivity is too high; the static corrosion of comparative example 3 is abnormal due to the fact that the coolant composition does not contain a chalcone derivative; the cast aluminum corrosion of comparative example 4 is unqualified due to the excessive amount of low ionization degree organic acid corrosion inhibitor in the coolant composition; the stability of comparative example 5 is unqualified due to the fact that the coolant composition contains too little anti-scaling stabilizer.

[0195] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A composition for preparing a coolant, characterized in that: In parts by weight, the composition comprises: Antifreeze: 45-55 parts by weight; Water: 45-55 parts by weight; Low ionization degree organic acid corrosion inhibitor: 1-2 parts by weight; Azole compound: 0.5-1 parts by weight; Ion capture agent: 0.2-0.7 parts by weight; Amine pH regulator: 0.1-0.5 parts by weight; Chalcone derivative: 0.3-0.8 parts by weight; Nonionic azo ligand compound: 0.5-1.2 parts by weight.

2. The composition according to claim 1, wherein The low ionization degree organic acid corrosion inhibitor is selected from one or more of dodecanedioic acid, decenoic acid, linoleic acid, p-tert-butylbenzoic acid and octanoic acid; And / or, the azole compound is selected from one or more of 1,2,4-triazole, benzotriazole, methylbenzotriazole, 1,2,3-triazole and 3-amino-1,2,4-triazole; And / or, the ion capture agent is selected from one or more of polyethyleneimine, polyacrylic acid, nitrilotriacetic acid and polyethylene glycol diamine; and / or, the amine pH regulator is selected from one or more of triethylamine, dimethylethanolamine, morpholine and triethanolamine; and / or, the chalcone derivative is selected from one or more of formyl chalcone, amino chalcone, 4'-hydroxy chalcone, acetyl chalcone and 4'-methoxy chalcone; And / or, the nonionic azo ligand compound is selected from one or more of 4,4'-diaminoazobenzene, 4-hydroxyazobenzene, azoquinoline, azoanthraquinone and azobenzene-4-sulfonic acid.

3. The composition according to claim 1 or 2, wherein The composition further comprises: Anti-scaling stabilizer: 0.02-0.05 parts by weight; Antioxidant: 0.03-0.08 parts by weight; Antifoaming agent: 0.05-0.08 parts by weight.

4. The composition according to claim 3, wherein The anti-fouling stabilizer is selected from one or more of polyacrylic acid-maleic anhydride copolymer, polyacrylic acid-vinyl sulfonic acid copolymer, polyvinyl alcohol-polyacrylic acid copolymer and polyacrylic acid-acrylamide copolymer; And / or, the antioxidant is selected from one or more of polyethylene oxide, polypropylene oxide, diisostearyl dilaurate, behenylphenol and 2,4-di-tert-butyl-p-chlorophenol; And / or, the anti-foaming agent is selected from one or more of polyethylene glycol, fatty alcohol polyoxyethylene ether, polydimethylsiloxane and ethoxylated fatty acid ester.

5. A method for preparing a coolant using the composition for preparing a coolant according to any one of claims 1 to 4, characterized in that: The method includes: (1) contacting and mixing an antifreeze agent, deionized water, a low-ionization organic acid corrosion inhibitor, an azole compound, a chalcone derivative, a nonionic azo ligand compound, an optional anti-scaling stabilizer, an optional antioxidant, an ion scavenger, and an optional anti-foaming agent to obtain a mixed solution; (2) stirring and mixing the mixed solution and the amine pH adjuster to obtain a mixed solution; (3) degassing the mixed solution to obtain a foam-free solution; (4) filtering the foam-free solution to obtain a cooling liquid.

6. The method according to claim 5, wherein: In step (1), the mixing conditions include: stirring and shearing dispersion at a speed of 3000-5000 rpm for 0.2-1 hour to obtain a mixed solution; and / or, in step (2), the pH value of the mixed solution is 7-10; And / or, in step (3), the conditions of the degassing treatment include: performing continuous degassing at a speed of 1000-1500 rpm for 0.1-0.5 hours to obtain a foam-free solution.

7. A cooling liquid prepared by the method according to claim 5 or 6.

8. The cooling liquid according to claim 7, wherein: The electrical conductivity of the cooling liquid at a temperature of 25° C. is 10-100 μS / cm, preferably 30-65 μS / cm, and more preferably 30-50 μS / cm.

9. The cooling liquid according to claim 7, wherein: The mass change of the heat transfer corrosion of the cast aluminum alloy of the coolant is ±1mg / cm 2 , preferably ±0.4mg / cm 2 , more preferably ±0.23 mg / cm 2 .

10. Use of the coolant according to any one of claims 7 to 9 in new energy electric vehicles.

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