WO2023145555A1 - Procédé de production d'un additif de liquide de refroidissement ou d'un liquide de refroidissement, et additif de liquide de refroidissement - Google Patents

Procédé de production d'un additif de liquide de refroidissement ou d'un liquide de refroidissement, et additif de liquide de refroidissement Download PDF

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Publication number
WO2023145555A1
WO2023145555A1 PCT/JP2023/001273 JP2023001273W WO2023145555A1 WO 2023145555 A1 WO2023145555 A1 WO 2023145555A1 JP 2023001273 W JP2023001273 W JP 2023001273W WO 2023145555 A1 WO2023145555 A1 WO 2023145555A1
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Prior art keywords
coolant
coupling agent
additive
water
silicate
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PCT/JP2023/001273
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English (en)
Japanese (ja)
Inventor
勇士 佐々木
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株式会社Moresco
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08—Materials not undergoing a change of physical state when used
    • C09K5/10—Liquid materials

Definitions

  • the present invention relates to a coolant additive or a coolant manufacturing method, and a coolant additive.
  • coolants such as engine coolants
  • coolants containing phosphoric compounds which are excellent in rust prevention of iron or aluminum
  • hard water is used as the diluent water for the coolant
  • phosphoric acid and minerals chemically react to form precipitates, which reduces the rust prevention function of the engine coolant.
  • Patent Document 1 discloses a coolant composition containing alcohol, silicate and a calcium compound.
  • Patent Document 1 when the composition of Patent Document 1 is used as a cooling liquid, the cooling liquid tends to become unstable due to gelation of the cooling liquid because the composition contains silicate. Therefore, the development of a non-phosphoric cooling liquid with suppressed gelation is desired.
  • an object of one aspect of the present invention is to provide a coolant additive that can be used in the production of a non-phosphate coolant.
  • the present inventors have made intensive studies and found that gelation is suppressed and stabilized by using a coolant additive produced by mixing and reacting specific components. It was found that a cooling liquid with high performance can be produced. In addition, the inventors have found that the cooling liquid has the same antirust property as that of the phosphoric acid-based cooling liquid, and have completed the present invention.
  • the present invention consists of the following configurations. - A method for producing a coolant additive, which comprises a reaction step of mixing and reacting water, an alcohol, a silicate, and a metal coupling agent. • Additives for coolants, including mixtures of water, alcohols, silicates, metal coupling agents, and partial reactions of these components.
  • FIG. 4 is a diagram showing the results of a stability test of Evaluation Example 1.
  • FIG. FIG. 10 is a diagram showing the results of an aluminum casting heat transfer surface corrosion test in Evaluation Example 4;
  • FIG. 10 is a diagram showing the results of a metal corrosiveness test in Evaluation Example 4;
  • FIG. 10 is a diagram showing the results of a metal corrosiveness test in Evaluation Example 5;
  • FIG. 10 is a diagram showing the results of a hard water stability test in Evaluation Example 6;
  • FIG. 12 is a diagram showing evaluation results of Evaluation Example 8;
  • a method for producing a coolant additive according to an aspect of the present invention includes a reaction step of mixing and reacting water, alcohol, silicate, and a metal coupling agent.
  • metal coupling agent refers to a compound having two or more different reactive groups (e.g., an epoxy group and an alkoxysilyl group), which serves to bind two or more different substances. It is not limited to things. Moreover, when it has three or more reactive groups, at least any two of them may be different reactive groups.
  • a coolant additive containing at least water, a silicate, or a reactant in which a metal coupling agent has reacted can be produced by the above-described reaction step.
  • the coolant additive will be described later.
  • the water used in the method for producing a coolant additive according to one aspect of the present invention may be ultrapure water, pure water, or purified water such as distilled water.
  • the alcohol used in the method for producing a coolant additive according to one aspect of the present invention may be monohydric alcohols or polyhydric alcohols. Additionally, the alcohol may be a primary, secondary or tertiary alcohol.
  • the alcohol is preferably a polyhydric alcohol, more preferably an aliphatic polyhydric alcohol, and even more preferably a primary aliphatic polyhydric alcohol.
  • the alcohol is preferably glycol or glycol ether in terms of suppressing gelation of the cooling liquid and freezing of the cooling liquid.
  • the lower limit of the number of carbon atoms in the alcohol is preferably 2 or more from the viewpoint of suppressing gelation of the cooling liquid.
  • the upper limit of the number of carbon atoms in the alcohol is preferably 10 or less, more preferably 5 or less, from the viewpoint of suppressing gelation of the cooling liquid.
  • Examples of preferred alcohols include ethylene glycol, propylene glycol, diethylene glycol, glycerin, 1,3-propanediol and the like.
  • ethylene glycol or propylene glycol is more preferable, and ethylene glycol is even more preferable, from the viewpoint of suppressing gelation of the coolant and suppression of freezing of the coolant.
  • the use of ethylene glycol improves the rust resistance to aluminum.
  • silicate used in the method for producing a coolant additive according to one aspect of the present invention is a silicate containing an element of Group 1 or an element of Group 2 of the periodic table in terms of improving rust resistance. Acid salts are preferred.
  • a material represented by nX 2 O ⁇ mSiO 2 is an example of a composition formula of a silicate containing an element of Group 1 or Group 2 of the periodic table.
  • X include alkali metals or alkaline earth metals such as potassium, sodium, lithium, magnesium, and calcium.
  • n and m are preferably 0.1-10.
  • the structure of the silicate may be ortho-, meta-, pyro-, or the like.
  • alkali metal silicates are more preferable, and potassium silicate represented by the compound name is even more preferable, from the viewpoint of improving rust resistance.
  • the metal coupling agent used in the method for producing a coolant additive according to one aspect of the present invention means a coupling agent containing a metal element such as titanium, zirconium, aluminum or silicon. Among them, a silane coupling agent is preferable from the viewpoint of suppressing the generation of gel in the cooling liquid.
  • titanium coupling agents examples include titanium alkoxides.
  • zirconium coupling agents examples include zirconium alkoxide and the like. Aluminum alkoxide etc. are mentioned as an aluminum coupling agent.
  • silane coupling agents include 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyl Diethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-acryloxypropyltrimethoxysilane, N-2-(aminoethyl)-3- aminopropyltrimethoxysilane, 3-ureidopropyltrialkoxysilane, 3-isocyanatopropyltriethoxysilane, tris-(trimethoxysilylpropyl)isocyanurate, 3-mercaptopropyltrimethoxysilane and the like.
  • Organic functional groups attached to silane coupling agents include vinyl groups, epoxy groups, styryl groups, methacrylic groups, acryl groups, amino groups, ureido groups, isocyanate groups, isocyanurate groups, mercapto groups, methylene groups, and the like. .
  • the number of hydroxyl groups attached to the silanol group is preferably 1 or more and 3 or less.
  • a silane coupling agent having an epoxy group is more preferable in that it suppresses gelling of the cooling liquid and does not have an unpleasant odor, and 3-glycidoxypropyltrimethoxysilane (hereinafter referred to as "3-GPTMS"). ) is more preferable.
  • reaction step In the reaction step, water, alcohol, silicate, and metal coupling agent are mixed to prepare a mixture.
  • the lower limit of the amount of the metal coupling agent is preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more in 100% by mass of the mixture.
  • the upper limit of the amount of the metal coupling agent is preferably 35% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less.
  • the lower limit of the amount of silicate is preferably 12.5% by mass or more, more preferably 15% by mass or more, and more preferably 17.5% by mass or more in 100% by mass of the mixture. preferable.
  • the upper limit of the amount of silicate is preferably 25% by mass or less, more preferably 22.5% by mass or less, and even more preferably 20% by mass or less.
  • the lower limit of the amount of alcohol may be 0.1% by mass or more, 1% by mass or more, 2% by mass or more, or 5% by mass or more in 100% by mass of the above mixture. may be Moreover, the upper limit of the amount of alcohol may be 50% by mass or less, 40% by mass or less, 30% by mass or less, or 20% by mass or less.
  • the reaction proceeds efficiently.
  • rust prevention against aluminum is improved.
  • the lower limit of the amount of water is preferably 22.5% by mass or more, more preferably 35% by mass or more, based on 100% by mass of the mixture.
  • the upper limit of the amount of water is preferably 75% by mass or less, more preferably 60% by mass or less.
  • the blending amount of water is preferably larger than the blending amounts of the metal coupling agent, silicate, and alcohol from the viewpoint of facilitating adjustment of the coolant containing the coolant additive.
  • the order of mixing is not particularly limited, but from the viewpoint of the stability of the coolant additive, water and silicate may be mixed before the metal coupling agent is mixed. preferable.
  • the mixture may be prepared by a known method such as stirring.
  • the reaction temperature is usually 20°C to 80°C, preferably 25°C to 60°C, because the evaporation of the components in the reaction process is small and the manufacturing equipment can be simplified.
  • the reaction time is usually 3 hours to 100 hours, preferably 5 hours to 80 hours.
  • the lower limit of T in formulas (A) and (B) is preferably 0°C or higher, more preferably 10°C or higher, and even more preferably 20°C or higher.
  • the upper limit of T is preferably 100°C or lower, more preferably 85°C or lower, and even more preferably 70°C or lower.
  • the lower limit of h in formulas (A) and (B) may be 1 hour or more, 7 hours or more, 14 hours or more, or 24 hours or more, It may be 48 hours or longer, or 72 hours or longer.
  • the upper limit of h may be 1000 hours or less, 360 hours or less, 120 hours or less, or 96 hours or less.
  • a coolant additive manufactured by the method for manufacturing a coolant additive according to one aspect of the present invention described above is also included in one aspect of the present invention.
  • a method for manufacturing a coolant according to one aspect of the present invention may include a step of manufacturing a coolant additive by the method for manufacturing a coolant additive according to one aspect of the present invention.
  • the coolant additive produced by the method for producing a coolant additive according to one aspect of the present invention includes water such as ion-exchanged water, ethylene A solvent such as glycol; an organic acid; a neutralizer (pH adjuster); a coloring agent;
  • the amount of the coolant additive in the coolant according to one aspect of the present invention can be appropriately adjusted according to the application. 05% by mass or more, and more preferably 0.1% by mass or more. Further, the upper limit of the amount of the coolant additive is preferably 3% by mass or less, more preferably 1% by mass or less. When the amount of the coolant additive is within the above range, the rust prevention and stability of the coolant are further improved. Further, when the amount of the additive for coolant is within the above range, the coolant exhibits sufficient anticorrosiveness to metals.
  • a coolant additive according to one aspect of the present invention includes a mixture of water, an alcohol, a silicate, and a metal coupling agent, and a partial reaction product obtained by reacting these components.
  • a "partial reactant” refers to a reactant produced by reacting at least two components contained in a liquid, or a reactant produced by reacting the same components with each other.
  • reaction product of a metal coupling agent and water a reaction product of a metal coupling agent and a silicate, a reaction product of a metal coupling agent, a silicate and water, a reaction product of a silicate and a silicate A reactant, or a reactant of water, silicate and/or a metal coupling agent with an alcohol, and the like.
  • one aspect of the present invention also includes a coolant additive manufactured by the method for manufacturing a coolant additive according to one aspect of the present invention.
  • a coolant according to one aspect of the present invention contains the coolant additive. Further, one aspect of the present invention also includes a coolant manufactured by a method for manufacturing a coolant according to one aspect of the present invention.
  • the cooling liquid according to one aspect of the present invention has high stability.
  • the cooling liquid according to one aspect of the present invention is a non-phosphoric cooling liquid, it has the same anticorrosion properties as the phosphoric acid cooling liquid.
  • the cooling liquid according to one aspect of the present invention is a non-phosphate cooling liquid and has excellent hard water stability.
  • coolants include coolants and antifreeze used in internal combustion engines such as diesel engines and gasoline engines, batteries such as fuel cells and secondary batteries, heat pipes, and motors. Among others, it can be suitably used as a coolant for internal combustion engines.
  • a coolant additive according to an aspect of the present invention includes a compound represented by the following formula (1) as a partial reaction product.
  • Each of R 1 to R 3 is independently a hydroxyl group, an alkyl group having an ether bond, or an amide group, any two of R 1 to R 3 may be bonded to each other, and the bonding group is a ketone may be a base
  • R 4 is an alkyl group having 1 to 10 carbon atoms, -(CH 2 ) Z 1 -CO-NH-(CH 2 ) Z 2 -, or -(CH 2 ) Z 3 -SH 2 -(CH 2 ) Z 4 - Yes, 1 ⁇ Z1 + Z2 ⁇ 10, 1 ⁇ Z3 + Z4 ⁇ 10
  • R5 is an alkyl group having 1 to 10 carbon atoms, isopropyl group, vinyl group, styryl group, acryl group, amino group, carboxyl group, ureido group, mercapto group,
  • the coolant additive according to one aspect of the present invention preferably contains any one of the compounds represented by the following formulas (2) to (9) as a partial reaction product, and the following formulas (2) and (3) , (6) or (7), and more preferably a compound represented by the following formula (2) or (6).
  • identification by analysis by mass spectrometry (MS), nuclear magnetic resonance (NMR), or the like can be mentioned.
  • the coolant according to one aspect of the present invention has an excellent rust-preventing effect on metals even if it does not contain phosphoric acid.
  • SDGs Sustainable Development Goals
  • a method for producing a coolant additive comprising a reaction step of mixing and reacting water, an alcohol, a silicate, and a metal coupling agent.
  • the metal coupling agent is at least one coupling agent selected from titanium coupling agents, zirconium coupling agents, aluminum coupling agents and silane coupling agents.
  • manufacturing method of additive for [3] The method for producing a coolant additive according to [1] or [2], wherein the metal coupling agent is 3-glycidoxypropyltrimethoxysilane.
  • Method. [5] A method for producing a coolant, comprising a step of producing a coolant additive by the method for producing a coolant additive according to any one of [1] to [4]. [6] A coolant additive comprising a mixture of water, an alcohol, a silicate and a metal coupling agent, and a partial reaction product of these components.
  • the partial reaction product includes a reaction product of the metal coupling agent and the water, a reaction product of the metal coupling agent and the silicate, and a reaction product of the metal coupling agent, the silicate and the
  • the coolant additive according to [6] which is at least one selected from the group consisting of a reaction product with water.
  • % represents % by mass unless otherwise specified.
  • addition is performed by dropping, but the addition may not be by dropping.
  • the mixture is allowed to stand still in the reaction step, but the mixture may be fluidized continuously or intermittently by stirring or the like.
  • the obtained coolant additives 1 to 6 were prepared by mixing with ethylene glycol containing an organic acid and a neutralizer at the coolant formulation ratio shown in Table 1, and evaluated as coolants 1 to 6. .
  • the organic acid and the neutralizing agent are additives generally contained in the cooling liquid, and do not affect the stability of the cooling liquid, and the neutralizing agent does not contribute to the anti-corrosion properties.
  • Fig. 1 shows the cooling liquids 3 and 7 after standing for 1 hour in a constant temperature bath at 60°C.
  • the cooling liquid (50% diluted liquid) is the cooling liquid obtained by diluting with ultrapure water.
  • the cooling liquids 1 to 3 containing the cooling liquid additive obtained by setting the standing temperature to 30 ° C. and standing for one day or more, the cooling liquid is stable and cloudy or precipitated. did not occur, and gelling of the coolant was suppressed.
  • the cooling liquid 3 was transparent and had good properties. The stability of the cooling liquid was maintained even when the cooling liquid 3 and ultrapure water were mixed to dilute the cooling liquid concentration to 50%.
  • the cooling liquids 1 and 2 also gave the same results as the cooling liquid 3.
  • Cooling liquids 4 to 6 containing cooling liquid additives with the stationary temperature set to 0°C became cloudy and the cooling liquid was unstable.
  • no precipitation or white turbidity occurred in the coolant containing the additive for coolant obtained by standing at 0° C. for 37 days. From these results, in the manufacture of coolant additives, if the standing temperature is low, the gelling of the coolant may be suppressed by extending the standing time, but the stability of the coolant can be ensured. It has been suggested that it is difficult
  • sample a had the same anticorrosive properties as samples b to d of commercial cooling liquids.
  • LC-MS Analysis conditions by LC-MS are shown below.
  • Apparatus (LC): Agilent 1100 Series manufactured by Agilent Technologies Apparatus (MS): Bruker Daltonics microTOF focus type Column: Unison UK-C8 (3 ⁇ m, 4.6 ⁇ 150 mm) Mobile phase: 10 mM ammonium bicarbonate aqueous solution/acetonitrile 1/5 Flow rate: 1 mL/min Column temperature (LC part): 40°C Mass spectrometry temperature (MS section): 190°C Detection method: ESI (negative mode) Injection volume: 10 ⁇ L
  • the coolant additive contained the following two compounds. These compounds are believed to have been produced during the reaction process during the preparation of the coolant additive.
  • the above four compounds are presumed to correspond to reactants of a metal coupling agent, water, silicate and alcohol, or reactants of a metal coupling agent, water and alcohol.
  • the above compound uses a silane coupling agent as a metal coupling agent.
  • FIG. 6 shows a graph created for deriving the formula.
  • the circled plots in FIG. 6 are plots obtained by reflecting the data in Table 6, and the following formula (A1) was derived.
  • y ⁇ 7.58x ⁇ 22.889 (A1)
  • x 1000/(273.14+T)
  • y ln(h)
  • T represents a temperature (unit: ° C.) that satisfies 0 ⁇ T ⁇ 100
  • h represents time (unit: hour).
  • the triangle mark plot in FIG. 6 is a plot obtained by reflecting the data in Table 5, and the following formula (B1) was derived.
  • y ⁇ 7.58x ⁇ 21.089 (B1)
  • x 1000/(273.14+T)
  • y ln(h)
  • T represents a temperature (unit: ° C.) that satisfies 0 ⁇ T ⁇ 100
  • h represents time (unit: hour).
  • reaction temperatures and reaction times in Table 5 satisfy the above formulas (A1) and (B1).
  • the reaction temperature and reaction time may be appropriately determined, but if the reaction rate is low, the stability of the coolant additive and the coolant will be insufficient.
  • coolant additive 13 does not have antifreeze properties because EG is not added.
  • Coolant Additives 3, 13 and 14 all showed good results in the stability test, metal corrosion test and hard water stability test. Thereby, by mixing and reacting water, silicate and metal coupling agent, a partial reaction product of these components is generated. It has been found that the inclusion of the partial product provides a coolant additive exhibiting good stability and antirust properties.
  • the entire aluminum test piece (AC2A) was immersed in a solution containing 1% of each cooling additive, 1% of sodium hypochlorite, and 98% of water, and was kept at a constant temperature of 60 ° C. The change in weight of the aluminum test piece after standing in the tank for 96 hours was evaluated.
  • Cooling liquid additive 3 which was produced by mixing alcohol, silicate, water, and a metal coupling agent and leaving the mixture at 30°C for 3 days, had high rust resistance.
  • the coolant additive 13 that does not contain alcohol and the coolant additive 14 that is mixed with silicate, water and a metal coupling agent and allowed to stand at 30 ° C. for 3 days and then added with alcohol is not suitable for cooling.
  • the antirust property was inferior to that of Additive 3. From these results, it was found that a coolant additive having an excellent antirust effect can be obtained by mixing and reacting alcohol, water, silicate and a metal coupling agent with the coolant additive. In the coolant additive 3, it is presumed that water, silicate and/or a metal coupling agent react with alcohol to produce a reaction product.
  • water, a silicate, and a metal coupling agent are mixed for a predetermined time (for example, several hours to several days), and then alcohol is added. good too.
  • the present invention can be used as additives for coolants, coolants for engine or battery cooling, rust inhibitor compositions for rust prevention, metalworking compositions for metalworking, and the like.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

L'invention concerne un additif de liquide de refroidissement qui peut être utilisé dans la production d'un liquide de refroidissement sans phosphate. Ce procédé de production d'un additif de liquide de refroidissement comprend une étape de réaction pour mélanger et faire réagir de l'eau, un alcool, un silicate et un agent de couplage métallique.
PCT/JP2023/001273 2022-01-26 2023-01-18 Procédé de production d'un additif de liquide de refroidissement ou d'un liquide de refroidissement, et additif de liquide de refroidissement WO2023145555A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01172485A (ja) * 1987-12-22 1989-07-07 Korea Advanced Inst Of Sci Technol 自動車放熱器用不凍液組成物
CN105694825A (zh) * 2014-11-28 2016-06-22 比亚迪股份有限公司 一种发动机磨合试车液
CN106811181A (zh) * 2015-11-27 2017-06-09 青岛城轨交通装备科技有限公司 一种汽车发动机防冻液
CN107573906A (zh) * 2017-09-08 2018-01-12 常州市奥普泰科光电有限公司 一种环保型抗腐蚀发动机冷却液的制备方法
CN109929521A (zh) * 2017-12-15 2019-06-25 新昌县新崎制冷设备有限公司 一种机加工用冷却液

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01172485A (ja) * 1987-12-22 1989-07-07 Korea Advanced Inst Of Sci Technol 自動車放熱器用不凍液組成物
CN105694825A (zh) * 2014-11-28 2016-06-22 比亚迪股份有限公司 一种发动机磨合试车液
CN106811181A (zh) * 2015-11-27 2017-06-09 青岛城轨交通装备科技有限公司 一种汽车发动机防冻液
CN107573906A (zh) * 2017-09-08 2018-01-12 常州市奥普泰科光电有限公司 一种环保型抗腐蚀发动机冷却液的制备方法
CN109929521A (zh) * 2017-12-15 2019-06-25 新昌县新崎制冷设备有限公司 一种机加工用冷却液

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