JP2010270256A - Coolant of high cooling performance - Google Patents
Coolant of high cooling performance Download PDFInfo
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- JP2010270256A JP2010270256A JP2009124407A JP2009124407A JP2010270256A JP 2010270256 A JP2010270256 A JP 2010270256A JP 2009124407 A JP2009124407 A JP 2009124407A JP 2009124407 A JP2009124407 A JP 2009124407A JP 2010270256 A JP2010270256 A JP 2010270256A
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Abstract
Description
本発明はエンジンを冷却するための冷却液組成物に関する。 The present invention relates to a coolant composition for cooling an engine.
自動車エンジン等を冷却するための冷却液としては様々なものが知られているが、その中でも水はエンジン用冷却液としての冷却性能が最も高いために好ましい。しかし、真水は摂氏0℃以下になると凍結し体積が増大するため、エンジンやラジエーターに損傷を与える恐れがある。そのため、凝固点降下剤を加えることで冬期や寒冷地における水の凍結を防止している。 Various cooling liquids for cooling automobile engines and the like are known. Among them, water is preferable because of its highest cooling performance as engine cooling liquid. However, fresh water freezes below 0 degrees Celsius and increases in volume, which can damage the engine and radiator. Therefore, the freezing point depressant is added to prevent freezing of water in winter and cold regions.
凝固点降下剤としては種々の物質が知られており、例えばエチレングリコールやプロピレングリコール等が使用されている(特許文献1)。これらの凝固点降下剤を加えることにより冷却液の不凍性を向上させることが可能である一方、これらの成分が混入することにより水の冷却性能が低下するという問題があった。 Various substances are known as freezing point depressants, such as ethylene glycol and propylene glycol (Patent Document 1). By adding these freezing point depressants, it is possible to improve the antifreezing property of the cooling liquid, but there has been a problem that the cooling performance of water is reduced by mixing these components.
本発明は高い冷却性能と不凍性とを有する冷却液組成物を提供することを目的とする。 An object of the present invention is to provide a coolant composition having high cooling performance and antifreeze.
上記課題を解決するために本発明者らは鋭意検討した結果、曇点を有する界面活性剤を所定の割合で添加することにより当該課題を解決できることを見出した。 As a result of intensive studies to solve the above problems, the present inventors have found that the problems can be solved by adding a surfactant having a cloud point at a predetermined ratio.
即ち、本発明は以下の発明を包含する。
(1)水と曇点を有する界面活性剤とを含む冷却液組成物であって、前記界面活性剤の含有量が組成物を基準として25〜70重量%である、前記組成物。
(2)界面活性剤がポリオキシエチレンポリオキシプロピレンアルキルエーテルである、前記(1)に記載の組成物。
(3)曇点が0〜135℃である、前記(1)又は(2)に記載の組成物。
That is, the present invention includes the following inventions.
(1) A cooling liquid composition comprising water and a surfactant having a cloud point, wherein the surfactant content is 25 to 70% by weight based on the composition.
(2) The composition according to (1), wherein the surfactant is polyoxyethylene polyoxypropylene alkyl ether.
(3) The composition according to (1) or (2), wherein the cloud point is 0 to 135 ° C.
本発明によれば、高い冷却性能と不凍性とを有する冷却液組成物を提供することができる。具体的には、凝固点降下剤として曇点を有する界面活性剤を所定の割合で水に添加することにより、低温域(曇点以下)では水と界面活性剤が混合されて不凍性が向上する。一方、冷却性能が必要とされる高温域(曇点以上)では水と界面活性剤が分離し、水のみを冷却液として使用することができるため高い冷却性能を発揮する。 ADVANTAGE OF THE INVENTION According to this invention, the cooling fluid composition which has high cooling performance and antifreeze can be provided. Specifically, by adding a surfactant having a cloud point as a freezing point depressant to water at a predetermined ratio, water and the surfactant are mixed in a low temperature range (below the cloud point) to improve antifreeze. To do. On the other hand, in a high temperature range (cooling point or higher) where cooling performance is required, water and the surfactant are separated, and only water can be used as a cooling liquid, so that high cooling performance is exhibited.
本発明で用いられる水はとしては、一般的に水と称される全てのものを使用することができるが、腐食性の観点から水道水、純水、精製水、蒸留水、及びイオン交換水の使用が望ましい。 As the water used in the present invention, all water generally called water can be used, but tap water, pure water, purified water, distilled water, and ion exchange water are used from the viewpoint of corrosiveness. Is desirable.
本発明で用いられる界面活性剤としては、曇点を有する公知の様々な界面活性剤を使用することができる。例えば、これらに限定されるものではないが、ポリオキシエチレンポリオキシプロピレン(POE・POP)アルキルエーテル、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルフェニルエーテル、脂肪酸ポリエチレングリコール、脂肪酸ポリオキシエチレンソルビタン、ポリオキシエチレンアルキルアミノエーテル、ポリオキシプロピレンアルキルエーテル、ポリオキシプロピレンアルキルフェニルエーテル、脂肪酸ポリプロピレングリコール、脂肪酸ポリオキシプロピレンソルビタン、及びポリオキシプロピレンアルキルアミノエーテル等の非イオン性界面活性剤を使用することができ、特に、ポリオキシエチレンポリオキシプロピレンアルキルエーテルが好ましく使用される。ポリオキシエチレンポリオキシプロピレンアルキルエーテルは交互共重合体、ブロック共重合体、及びランダム共重合体のいずれであってもよい。界面活性剤は、単独で、又は2種以上を組み合わせて使用することができる。 As the surfactant used in the present invention, various known surfactants having a cloud point can be used. For example, but not limited to, polyoxyethylene polyoxypropylene (POE / POP) alkyl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, fatty acid polyethylene glycol, fatty acid polyoxyethylene sorbitan, poly Nonionic surfactants such as oxyethylene alkyl amino ether, polyoxypropylene alkyl ether, polyoxypropylene alkyl phenyl ether, fatty acid polypropylene glycol, fatty acid polyoxypropylene sorbitan, and polyoxypropylene alkyl amino ether can be used. In particular, polyoxyethylene polyoxypropylene alkyl ether is preferably used. The polyoxyethylene polyoxypropylene alkyl ether may be any of an alternating copolymer, a block copolymer, and a random copolymer. Surfactants can be used alone or in combination of two or more.
本発明の冷却液組成物における界面活性剤の含有量は、不凍性を得るために該組成物を基準として25重量%以上含まれていることが好ましく、一方で冷却に使用する水を確保するために70重量%以下であることが好ましい。より好ましくは30〜60重量%であり、さらに好ましくは40〜55重量%である。 The content of the surfactant in the coolant composition of the present invention is preferably 25% by weight or more based on the composition in order to obtain antifreezing properties, while securing water used for cooling. Therefore, it is preferably 70% by weight or less. More preferably, it is 30-60 weight%, More preferably, it is 40-55 weight%.
本発明に用いられる界面活性剤の曇点は0〜135℃が好ましく、より好ましくは30〜105℃、さらに好ましくは50〜85℃である。曇点が0℃未満の場合には0℃未満の温度においても冷却液が分離しており、十分な不凍効果を発揮することはできない。一方、エンジンで加熱された冷却液の温度の上限は135℃であるため、曇点が135℃よりも高い場合には冷却液が分離せず、前述の高い冷却性能を発揮することができない。 The cloud point of the surfactant used in the present invention is preferably 0 to 135 ° C, more preferably 30 to 105 ° C, and still more preferably 50 to 85 ° C. When the cloud point is less than 0 ° C, the cooling liquid is separated even at a temperature less than 0 ° C, and a sufficient antifreezing effect cannot be exhibited. On the other hand, since the upper limit of the temperature of the coolant heated by the engine is 135 ° C., when the cloud point is higher than 135 ° C., the coolant does not separate and the above-described high cooling performance cannot be exhibited.
本発明の冷却液組成物には前記界面活性剤以外の成分を添加することもできる。例えば、これらに限定されないが、金属腐食防止剤、凝固点降下剤、酸化防止剤、消泡剤、殺菌剤、防腐剤、緩衝剤、着色剤、及び香料を添加することが可能である。 Components other than the surfactant can also be added to the coolant composition of the present invention. For example, but not limited to, it is possible to add metal corrosion inhibitors, freezing point depressants, antioxidants, antifoaming agents, bactericides, preservatives, buffers, colorants, and perfumes.
本発明の冷却組成物は冷却するために使用されるのであればその用途は問わず、内燃機関や外燃機関等の様々な熱機関を冷却するために使用することができる。具体的には、これらに限定されるものではないが、自動車、船舶、航空機、発電所、及び燃料電池等に使用することができる。 The cooling composition of the present invention can be used for cooling various heat engines such as an internal combustion engine and an external combustion engine as long as the cooling composition is used for cooling. Specifically, it is not limited to these, but can be used for automobiles, ships, aircraft, power plants, fuel cells, and the like.
以下、実施例及び比較例により本発明をより詳細に説明するが、本発明はこれらの実施例に限定されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention in detail, this invention is not limited to these Examples.
実施例1
表1に示すように、曇点55℃の界面活性剤(POE・POPアルキルエーテル)(花王株式会社製 エマルゲンMS-110)を50重量%の割合で水に添加した場合、-10℃でも凍結せず、88℃に加温することで水と界面活性剤が分離した。
Example 1
As shown in Table 1, when a surfactant (POE / POP alkyl ether) with a cloud point of 55 ° C (Emulgen MS-110, manufactured by Kao Corporation) was added to water at a rate of 50% by weight, it was frozen even at -10 ° C. Without heating, water and surfactant were separated by heating to 88 ° C.
実施例2
表1に示すように、曇点55℃の界面活性剤(POE・POPアルキルエーテル)(花王株式会社製 エマルゲンMS-110)を25重量%の割合で水に添加した場合、-5℃でも凍結せず、88℃に加温することで水と界面活性剤が分離した。
Example 2
As shown in Table 1, when a surfactant (POE / POP alkyl ether) with a cloud point of 55 ° C (Emulgen MS-110, manufactured by Kao Corporation) was added to water at a rate of 25% by weight, it was frozen even at -5 ° C. Without heating, water and surfactant were separated by heating to 88 ° C.
比較例1
表1に示すように、曇点55℃の界面活性剤(POE・POPアルキルエーテル)(花王株式会社製 エマルゲンMS-110)を10重量%の割合で水に添加した場合、-5℃で凍結した。
Comparative Example 1
As shown in Table 1, when a surfactant (POE / POP alkyl ether) with a cloud point of 55 ° C (Emulgen MS-110, manufactured by Kao Corporation) was added to water at a rate of 10% by weight, it was frozen at -5 ° C. did.
比較例2
表1に示すように、界面活性剤を添加しなかった場合、-5℃で凍結した。
Comparative Example 2
As shown in Table 1, when the surfactant was not added, it was frozen at -5 ° C.
比較例3
表1に示すように、曇点55℃の界面活性剤(POE・POPアルキルエーテル)の代わりにエチレングリコールを50重量%の割合で水に添加した場合、88℃に加温しても水とエチレングリコールは分離しなかった。
Comparative Example 3
As shown in Table 1, when ethylene glycol was added to water in a proportion of 50% by weight instead of a surfactant (POE / POP alkyl ether) having a cloud point of 55 ° C, Ethylene glycol did not separate.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014189736A (en) * | 2013-03-28 | 2014-10-06 | Cci Corp | Cooling liquid composition |
JP2014189737A (en) * | 2013-03-28 | 2014-10-06 | Cci Corp | Cooling liquid composition |
JP2015052086A (en) * | 2013-09-09 | 2015-03-19 | トヨタ自動車株式会社 | Cooling liquid composition |
WO2017175053A1 (en) | 2016-04-04 | 2017-10-12 | Toyota Jidosha Kabushiki Kaisha | Coolant composition and method of operating internal combustion engine using the same |
US10160895B2 (en) | 2014-12-26 | 2018-12-25 | Toyota Jidosha Kabushiki Kaisha | Coolant composition, method of operating internal combustion engine using the same, and use of the same |
US10421924B2 (en) | 2012-12-27 | 2019-09-24 | Idemitsu Kosan Co., Ltd. | Water-based coolant |
US10968170B2 (en) | 2016-05-25 | 2021-04-06 | Kao Corporation | Viscometric properties improver |
EP3743777A4 (en) * | 2018-01-26 | 2021-09-22 | Ethan J. Novek | Systems and methods for active cloud point adjustment and refrigeration cycles |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003027047A (en) * | 2001-07-16 | 2003-01-29 | Sanshin Kagaku Kogyo Kk | Coolant composition |
JP2007269825A (en) * | 2006-03-30 | 2007-10-18 | Honda Motor Co Ltd | Antifreeze liquid/cooling liquid composition for magnesium or magnesium alloy |
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2009
- 2009-05-22 JP JP2009124407A patent/JP2010270256A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003027047A (en) * | 2001-07-16 | 2003-01-29 | Sanshin Kagaku Kogyo Kk | Coolant composition |
JP2007269825A (en) * | 2006-03-30 | 2007-10-18 | Honda Motor Co Ltd | Antifreeze liquid/cooling liquid composition for magnesium or magnesium alloy |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10421924B2 (en) | 2012-12-27 | 2019-09-24 | Idemitsu Kosan Co., Ltd. | Water-based coolant |
JP2014189736A (en) * | 2013-03-28 | 2014-10-06 | Cci Corp | Cooling liquid composition |
JP2014189737A (en) * | 2013-03-28 | 2014-10-06 | Cci Corp | Cooling liquid composition |
JP2015052086A (en) * | 2013-09-09 | 2015-03-19 | トヨタ自動車株式会社 | Cooling liquid composition |
US10160895B2 (en) | 2014-12-26 | 2018-12-25 | Toyota Jidosha Kabushiki Kaisha | Coolant composition, method of operating internal combustion engine using the same, and use of the same |
WO2017175053A1 (en) | 2016-04-04 | 2017-10-12 | Toyota Jidosha Kabushiki Kaisha | Coolant composition and method of operating internal combustion engine using the same |
US10913883B2 (en) | 2016-04-04 | 2021-02-09 | Toyota Jidosha Kabushiki Kaisha | Coolant composition and method of operating internal combustion engine using the same |
US10968170B2 (en) | 2016-05-25 | 2021-04-06 | Kao Corporation | Viscometric properties improver |
EP3743777A4 (en) * | 2018-01-26 | 2021-09-22 | Ethan J. Novek | Systems and methods for active cloud point adjustment and refrigeration cycles |
US11643583B2 (en) | 2018-01-26 | 2023-05-09 | Solvcor Technologies, Llc | Power generation |
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