Uninterruptible insulating cleaning agent composition for preventing electrical fires in high-voltage electrical and electronic communication equipment.

Abstract

An insulating cleaner composition is provided that increases the dielectric breakdown voltage and ignition point while maintaining the same level of natural volatility as conventional insulating cleaner compositions. One embodiment of the present invention provides an insulating cleaner composition that includes n-undecane, n-dodecane, and n-tridecane, and the total content of the n-undecane, n-dodecane, and n-tridecane is 87% by weight or more based on the total weight of the insulating cleaner composition.

Description

Technical Field

[0001] The present invention relates to an insulating cleaning agent composition, and more specifically, to a high-voltage electrical and electronic communication equipment insulating cleaning agent composition for preventing electrical fires.

Background Art

[0002] Conventional insulating cleaning agent compositions are manufactured by mixing inorganic salts and surfactants, but their usage range has been extremely limited due to their limited cleaning functions. In the case of cleaning agents for semi-solid contaminants, most of them add abrasive substances to the components having cleaning ability and incorporate abrasive substances with high hardness during use. However, such cleaning agents have the problem that when their usage frequency is high, the surface of the object to be cleaned is worn and damaged, and the accuracy of the mechanical device is reduced.

[0003] On the other hand, among the energized equipment devices, the switchboard is the most representative. The switchboard is equipment installed and used indoors or outdoors in buildings and substations with a large amount of electricity consumption, and is an electrical device that arranges and manages various switches, instruments, and relays (relays) in a fixed manner. The switchboard is provided with an operating lever for opening and closing the circuit breaker of the high-voltage main circuit, an air circuit breaker of the low-voltage main circuit, a voltmeter, an ammeter, a wattmeter, an integrated wattmeter, a current relay, etc., and a high-voltage current flows inside it.

[0004] Recently, in order to improve efficiency by operating production lines and management lines 24 hours a day in enterprises, it is preferred that the cleaning process be performed in a non-power-off state (Power on) using a cleaning agent with improved insulation. However, there has been a problem that it is difficult to sufficiently increase the breakdown voltage, which is the most important safety factor among the cleaning operation conditions required by enterprises.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide an insulating cleaning agent composition that increases the breakdown voltage and maintains a natural volatilization performance at the same level as the conventional one.

[0006] Another object of the present invention is to provide an insulating cleaning agent composition that can prevent fire by increasing the ignition point.

[0007] Another object of the present invention is to provide an insulating cleaning agent composition that is free of ozone-depleting substances, environmentally friendly, and capable of cleaning electrical panels (high / low voltage), electronic equipment, communication equipment, and high-performance control equipment non-stop without interrupting the power supply.

[0008] Another object of the present invention is to provide an insulating cleaning agent composition that contains a non-oxidizing substance to prevent damage to electronic components by cleaning, and that evaporates naturally after cleaning, leaving no residue.

[0009] Another object of the present invention is to provide an insulating cleaning agent composition that contains a non-corrosive substance and can effectively prevent corrosion of the object to be cleaned.

[0010] The objects of the present invention are not limited to those mentioned above, and other objects and advantages of the present invention not mentioned will be understood by the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be achieved by the means and combinations thereof set forth in the claims. [Means for solving the problem]

[0011] According to a first aspect of the present invention for achieving the above objective, there is an insulating cleaning agent composition comprising n-undecane, n-dodecane, and n-tridecane, wherein the sum of the contents of n-undecane, n-dodecane, and n-tridecane is 87% by weight or more based on the total weight of the insulating cleaning agent composition.

[0012] According to a second aspect of the present invention, in the first aspect, the insulating cleaning agent composition may contain 30-45% by weight of n-undecane, 28-35% by weight of n-dodecane, and 20-27% by weight of n-tridecane. Here, the sum of the contents of n-undecane, n-dodecane, and n-tridecane may be 87% by weight or more based on the total weight of the insulating cleaning agent composition.

[0013] According to a third aspect of the present invention, in the first or second aspect, the insulating cleaning agent composition may further contain 6 to 13% by weight of n-decane.

[0014] According to a fourth aspect of the present invention, in any of the first to third aspects, the insulating cleaning agent composition may further contain 0.10 to 4.00% by weight of n-tetradecane.

[0015] According to a fifth aspect of the present invention, in any of the first to fourth aspects, the insulating cleaning agent composition may not contain n-nonane.

[0016] According to a sixth aspect of the present invention, in any of the first to fifth aspects, the dielectric breakdown voltage of the insulating cleaning agent composition may be 100kV or more, in accordance with the KS C IEC 60156:2003 test standard.

[0017] According to a seventh aspect of the present invention, in any of the first to sixth aspects, the ignition point of the insulating cleaning agent composition may be 230°C or higher, in accordance with the ASTM E-659 test standard.

[0018] According to the eighth aspect of the present invention, in any of the first to seventh aspects, the insulating cleaning agent composition may further contain additives.

[0019] According to the ninth aspect of the present invention, in the eighth aspect, the additive may include one or more mixtures selected from the group consisting of isopropyl alcohol, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane, and pentafluoroethane.

[0020] The means of solving the aforementioned problems do not constitute a complete list of all the features of the present invention. The various features of the present invention and their advantages and effects can be understood in more detail by referring to the following specific examples. [Effects of the Invention]

[0021] According to one aspect of the present invention, by optimizing the number of carbon atoms of specific individual compounds constituting paraffinic hydrocarbons, it is possible to realize an insulating cleaning agent composition that not only increases the dielectric breakdown voltage while maintaining a level of spontaneous volatility equivalent to that of conventional products, but also raises the ignition point to prevent fire.

[0022] According to another aspect of the present invention, the cleaning method is free of ozone-depleting substances, environmentally friendly, and can be performed non-stop without interrupting the power supply to electrical panels (high / low voltage), electronic equipment, communication equipment, and high-performance control equipment.

[0023] According to yet another aspect of the present invention, an insulating cleaning agent composition can be realized that contains a non-oxidizing substance to prevent damage to electronic components by cleaning, and which evaporates naturally after cleaning, leaving no residue.

[0024] According to yet another aspect of the present invention, an insulating cleaning agent composition that can effectively prevent corrosion of the object to be cleaned can be realized.

[0025] In addition to the effects described above, the specific effects of the present invention will be explained and described below, along with the specific details for carrying out the invention.

Mode for Carrying Out the Invention

[0026] In this specification, a numerical range indicated using the term "or" means a numerical range including the values described before and after the term as the lower limit value and the upper limit value, respectively. When the numerical values of the upper limit and the lower limit of any numerical range are disclosed as a plurality respectively, the numerical range disclosed in this specification can be understood as an arbitrary numerical range having any one value of the plurality of lower limit values and any one value of the plurality of upper limit values as the lower limit value and the upper limit value, respectively.

[0027] 1. Insulating Cleaning Agent Composition In one embodiment of the present invention, there is provided an insulating cleaning agent composition containing n-undecane, n-dodecane, and n-tridecane, wherein the total content of the n-undecane, the n-dodecane, and the n-tridecane is 87% by weight or more based on the total weight of the insulating cleaning agent composition.

[0028] Conventionally, paraffinic hydrocarbons were simply used in an insulating cleaning agent composition to improve the dielectric breakdown voltage, flash point, and natural evaporation performance, but no attempt was made to maximize the dielectric breakdown voltage by combining the optimal carbon numbers of specific individual compounds forming the paraffinic hydrocarbons and to increase the flash point. In addition, an insulating cleaning agent composition containing paraffinic hydrocarbons having 10 to 12 carbon atoms as the main component had a problem that the dielectric breakdown voltage could not be sufficiently increased.

[0029] On the one hand, the flash point is the lowest temperature at which a flammable substance can be ignited in the air, while the ignition point is the lowest temperature at which a substance spontaneously ignites and begins to burn when heated in air. In the technical field of insulating cleaning agent compositions, evaluations have mainly focused on the flash point, but because the flash point is measured using an artificial flame, it may not be a reliable evaluation criterion for clearly measuring the occurrence of a fire. On the other hand, the ignition point is the temperature at which a substance spontaneously ignites without an artificial flame, and therefore can be a reliable objective evaluation criterion for clearly measuring the occurrence of a fire. According to one aspect of the present invention, by including 30-45% by weight of n-undecane, 28-35% by weight of n-dodecane, and 20-27% by weight of n-tridecane, an insulating cleaning agent composition can be realized that increases the dielectric breakdown voltage through an optimal combination of carbon numbers of specific individual compounds constituting paraffinic hydrocarbons, while maintaining a level of spontaneous volatility equivalent to conventional products, and also increases the ignition point to prevent fire. According to another aspect of the present invention, by using n-paraffinic hydrocarbons, which have a relatively higher molecular surface area than branched paraffinic hydrocarbons, the dielectric breakdown voltage of the insulating cleaning agent composition can be significantly increased. According to yet another aspect of the present invention, by an optimal combination of carbon numbers of specific individual compounds constituting paraffinic hydrocarbons, it is possible to clean electrical panels (high / low voltage), electronic equipment, communication equipment, and high-performance control equipment non-stop without interrupting the power supply, without ozone-depleting substances and being environmentally friendly. According to yet another aspect of the present invention, an insulating cleaning agent composition can be realized that contains a non-oxidizing substance by an optimal combination of carbon numbers of specific individual compounds forming paraffinic hydrocarbons, prevents damage to electronic components by cleaning, and evaporates naturally after cleaning, leaving no residue. According to yet another aspect of the present invention, an insulating cleaning agent composition can be realized that effectively prevents corrosion of the object being cleaned by an optimal combination of carbon numbers of specific individual compounds forming paraffinic hydrocarbons.

[0030] The configuration of the present invention will be described in more detail below.

[0031] An insulating cleaning agent composition according to one aspect of the present invention may contain paraffinic hydrocarbons to simultaneously improve dielectric breakdown voltage, ignition point, and natural evaporation performance. According to another aspect of the present invention, paraffinic hydrocarbons can effectively clean dust and fine particles.

[0032] On the other hand, paraffinic hydrocarbons, also simply called paraffins, are classified into n-paraffins (linear paraffins), in which all the constituent carbon atoms are linked together and arranged in a line, and carbon-chain isoparaffins. Paraffinic hydrocarbons may be classified into various types depending on the number of carbon atoms n they contain, such as methane (n=1), ethane (n=2), propane (n=3), butane (n=4), pentane (n=5), hexane (n=6), heptane (n=7), octane (n=8), nonane (n=9), decane (n=10), undecane (n=11), dodecane (n=12), tridecane (n=13), tetradecane (n=14), pentadecane (n=15), and hexadecane (n=16). Lower-grade methane, ethane, and propane are gases and exist as components of natural gas and petroleum gas. Higher-grade n-paraffins, from pentane (n=5) to hexadecane (n=16), are liquids, while higher-grade n-paraffins are solids. Isoparaffins tend to have lower boiling and melting points than n-paraffins with the same number of carbon atoms. Lower-grade isoparaffins are used as fuel gases, and those with low boiling points in liquid form may be used as gasoline components.

[0033] The insulating cleaning agent composition according to the present invention contains n-undecane, which has 11 carbon atoms, in order to simultaneously increase the dielectric breakdown voltage, ignition point, and natural evaporation performance. According to one aspect of the present invention, n-undecane, although having the same number of carbon atoms, significantly increases the dielectric breakdown voltage of the insulating cleaning agent composition compared to branched paraffinic hydrocarbons, and can also raise the ignition point, thereby effectively preventing the occurrence of fire.

[0034] Specifically, the n-undecane content may be 30-45% by weight, 30-40% by weight, 30-38% by weight, 30-36% by weight, 30-34% by weight, or 30-32% by weight, based on the total weight of the insulating cleaning agent composition. If the n-undecane content is below the above numerical range, problems may arise in that the dielectric breakdown voltage and ignition point do not become sufficiently high. If it exceeds the above numerical range, problems may arise in that the viscosity of the insulating cleaning agent composition increases excessively, reducing its natural evaporation performance and leaving residue after cleaning.

[0035] The insulating cleaning agent composition according to the present invention contains n-dodecane, which has 12 carbon atoms, in order to simultaneously increase the dielectric breakdown voltage, ignition point, and natural evaporation performance. According to one aspect of the present invention, n-dodecane, which has the same number of carbon atoms as branched paraffinic hydrocarbons, significantly increases the dielectric breakdown voltage of the insulating cleaning agent composition and raises the ignition point, thereby effectively preventing the occurrence of fire.

[0036] Specifically, the n-dodecane content may be 28-35% by weight, 29-34% by weight, 30-34% by weight, or 30-33% by weight based on the total weight of the insulating cleaning agent composition. If the n-dodecane content is below the above numerical range, problems may arise in that the dielectric breakdown voltage and ignition point do not become sufficiently high. If it exceeds the above numerical range, problems may arise in that the viscosity of the insulating cleaning agent composition increases excessively, reducing its natural evaporation performance and leaving residue after cleaning.

[0037] The insulating cleaning agent composition according to the present invention contains n-tridecane with 13 carbon atoms to simultaneously increase dielectric breakdown voltage, ignition point, and natural evaporation performance. According to one aspect of the present invention, n-tridecane, although having the same number of carbon atoms, significantly increases the dielectric breakdown voltage of the insulating cleaning agent composition compared to branched paraffinic hydrocarbons, and can also raise the ignition point to effectively prevent the occurrence of fire.

[0038] Specifically, the content of n-tridecane may be 20-27% by weight, 21-27% by weight, 22-27% by weight, 23-27% by weight, or 24-27% by weight, based on the total weight of the insulating cleaning agent composition. If the content of n-tridecane is below the above numerical range, problems may arise in that the dielectric breakdown voltage and ignition point do not become sufficiently high. If it exceeds the above numerical range, problems may arise in that the viscosity of the insulating cleaning agent composition increases excessively, reducing its natural evaporation performance and leaving residue after cleaning.

[0039] According to one embodiment of the present invention, the sum of the contents of n-undecane, n-dodecane, and n-tridecane may be 87% by weight or more, 87-92% by weight, 87-91% by weight, or 87-90% by weight, based on the total weight of the insulating cleaning agent composition. When the sum of the contents of n-undecane, n-dodecane, and n-tridecane satisfies the above numerical range, it is possible to increase the dielectric breakdown voltage, maintain a level of volatility equivalent to that of conventional products, and raise the ignition point to prevent fire.

[0040] The insulating cleaning agent composition according to the present invention may further contain a carbon-10 n-decane to simultaneously improve dielectric breakdown voltage, ignition point, and spontaneous evaporation performance.

[0041] Specifically, the content of n-decane may be 6-13% by weight, 6-12% by weight, 6-11% by weight, 7-10% by weight, or 8-10% by weight based on the total weight of the insulating cleaning agent composition. If the content of n-decane is below the above numerical range, problems may arise in that the dielectric breakdown voltage and ignition point do not become sufficiently high, and if it exceeds the above numerical range, problems may arise in that the cleaning power becomes low.

[0042] The insulating cleaning agent composition according to the present invention may further contain n-tetradecane having 14 carbon atoms in order to simultaneously increase the dielectric breakdown voltage, ignition point, and natural evaporation performance. According to one aspect of the present invention, n-tetradecane significantly increases the dielectric breakdown voltage of the insulating cleaning agent composition compared to branched paraffinic hydrocarbons with the same number of carbon atoms, and can also raise the ignition point to effectively prevent the occurrence of fire.

[0043] Specifically, the content of n-tetradecane is 0.10 to 4.00% by weight, 0.20 to 3.50% by weight, 0.20 to 3.10% by weight, or 0.30 to 3.10% by weight, based on the total weight of the insulating cleaning agent composition. It may also be 0.40 to 3.10% by weight, 0.50 to 3.10% by weight, or 0.60 to 3.10% by weight. Specifically, if the content of n-tetradecane is below the above numerical range, the dielectric breakdown voltage and ignition point will not be sufficiently high, and if it exceeds the above numerical range, the viscosity of the insulating cleaning agent composition will increase excessively, reducing its natural evaporation performance and potentially leaving residue after cleaning.

[0044] According to yet another embodiment of the present invention, the insulating cleaning agent composition does not need to contain a carbon-9 n-nonane. By not containing n-nonane, the insulating cleaning agent composition can be appropriately controlled to improve cleaning efficiency.

[0045] According to one embodiment of the present invention, the dielectric breakdown voltage of the insulating cleaning agent composition may be 98.7kV or higher, or 100kV or higher, in accordance with the KS C IEC 60156:2003 test standard. By ensuring that the dielectric breakdown voltage of the insulating cleaning agent composition is within the above numerical range, an appropriate environment for the switchboard can be created, effectively preventing fires.

[0046] According to one embodiment of the present invention, the ignition point of the insulating cleaning agent composition may be 230°C or higher, or 230-240°C, in accordance with the ASTM E-659 test standard. On the other hand, the flash point is the lowest temperature at which a flammable substance can be created in the air and ignited, while the ignition point is the lowest temperature at which a substance spontaneously ignites and begins to burn when heated in the air. In the technical field of insulating cleaning agent compositions, evaluations have mainly focused on the flash point, but because the flash point is measured using an artificial flame, it may not be a clear evaluation criterion for measuring the occurrence of a fire. On the other hand, the ignition point is the temperature at which a substance spontaneously ignites without an artificial flame, and therefore can be a clear objective evaluation criterion for measuring the occurrence of a fire. By ensuring that the ignition point of the cleaning agent composition is within the above numerical range, the occurrence of a fire can be effectively prevented.

[0047] If necessary, the insulating cleaning agent composition according to the present invention may further contain additives to enhance various properties of the insulating cleaning agent composition. For example, the content of the additive may be 1.0% by weight or less, 0.8% by weight or less, 0.5% by weight or less, 0.4% by weight or less, 0.3% by weight or less, 0.2% by weight or less, 0.1% by weight or less, or 0.01 to 0.10% by weight, based on the total weight of the insulating cleaning agent composition.

[0048] For example, the additive may include one or more additives selected from the group consisting of isopropyl alcohol, 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane, and pentafluoroethane. First, isopropyl alcohol is a low-hydride alcohol and may be added to reduce the viscosity of the insulating cleaner composition. Next, 1,1-difluoroethane, when mixed with paraffinic hydrocarbons, improves cleaning power and reduces pressure during the manufacturing process of the composition, thus eliminating the need to form thick mixing and storage containers and thus reducing manufacturing costs. Next, 1,1,1,2-tetrafluoroethane, when mixed with the paraffinic hydrocarbons, may be added to further enhance the cleaning power of the insulating cleaner composition. Next, pentafluoroethane is a colorless, odorless, and highly volatile compound that helps the insulating cleaning agent composition evaporate quickly after cleaning, thus preventing any residue of the cleaning agent from remaining on the surface of the object being cleaned.

[0049] The insulating cleaning agent composition according to the present invention may be in a solution state in which all components are uniformly mixed. Specifically, by configuring the insulating cleaning agent composition in a uniformly mixed solution state, it is possible to realize the advantages of being easy to manufacture, convenient to carry and store, and easy to combine with additives. Specifically, the insulating cleaning agent composition may be easily manufactured by filling the container with the individual paraffin compounds that make up the insulating cleaning agent composition without going through a separate stirring step.

[0050] 2. Applications of insulating cleaning agent compositions An insulating cleaning agent composition according to one embodiment of the present invention can effectively clean dust and fine particles from power equipment where it is difficult to shut off the power supply. For example, the insulating cleaning agent composition may be used to clean extra-high voltage (22.9kV~220kV), high voltage (3.3kV~6.6kV) power receiving panels, VCB panels, low voltage (380V~440V) panels, ACB & MCCB panels, control panels, PLCs, switch panels, electric vehicle resistors, filter reactors, vehicle distribution boards, etc.

[0051] The following describes in detail embodiments of the present invention so that those with ordinary skill in the art to which the present invention pertains can easily implement it. However, this is merely an example, and the scope of the rights of the present invention is not limited to the following.

[0052] [Manufacturing Example 1: Manufacturing of an insulating cleaning agent composition] An insulating cleaning agent composition was prepared with the composition shown in Table 1 below. Each individual component of the insulating cleaning agent composition was analyzed by gas chromatography-mass spectrometry (GC-MS).

[0053] [Table 1]

[0054] [Experimental Example 1: Evaluation of Insulating Cleaning Agent Composition] The dielectric breakdown voltage, ignition point, drying properties, specific gravity, corrosive sulfur, total acid number, and moisture performance of the insulating cleaning agent composition of Production Example 1 were evaluated using the following measurement methods.

[0055] 1) Dielectric breakdown voltage KS C measured the dielectric breakdown voltage of the insulating cleaning agent composition of Manufacturing Example 1 according to the IEC 60156:2003 test standard (measurement conditions: 25°C and 2.5 mm). On the other hand, dielectric breakdown is the phenomenon in which, when the electric field applied to an insulating material becomes large and reaches a certain value, a large current suddenly flows and the material becomes like a conductor. In this case, the voltage at which dielectric breakdown occurs is called the dielectric breakdown voltage. The higher the dielectric breakdown voltage, the better the performance required for cleaning electrical distribution boards in an uninterrupted state without interrupting the power supply.

[0056] 2) Ignition point The ignition point is the lowest temperature at which a substance will spontaneously ignite and begin to burn when heated in air. It refers to the temperature at which the vapor of a volatile liquid begins to burn under conditions where there is an ignition source. The ignition point (°C) of the insulating cleaning agent composition of Production Example 1 was measured using ASTM E-659, and a higher ignition point indicates a lower risk of ignition.

[0057] 3)Dryness The drying properties of the insulating cleaning agent composition of Manufacturing Example 1 were evaluated under the measurement conditions (23°C and 4 hours) according to the KS M 2109:2020 test standard. Specifically, this means that the drying properties are excellent when the object to be cleaned is in a non-stick state.

[0058] 4)Specific gravity The specific gravity of the insulating cleaning agent composition of Manufacturing Example 1 was evaluated according to the ASTM D-1298 test standard.

[0059] 5) Corrosive sulfur When a test switchboard was cleaned with the insulating cleaning agent composition of Manufacturing Example 1, the presence or absence of corrosion in the test switchboard was evaluated according to the KS C 2101:2017 test standard. The evaluation of corrosive sulfur was performed under measurement conditions of 140°C and 19 hours.

[0060] 6) Total acid number The total acid value of the insulating cleaning agent composition of Production Example 1 was measured according to the KS C 2101:2017 test standard. The total acid value is the amount of acid contained in the insulating cleaning agent composition of Production Example 1, and the amount of alkali (mg KOH) required to neutralize that acid. The lower the amount of alkali, the less alkali is required to neutralize the acid contained in the insulating cleaning agent composition, which means that the emulsion stability of the insulating cleaning agent composition is excellent.

[0061] 7) Water After spraying the insulating cleaning agent composition of Manufacturing Example 1 onto a test switchboard, the moisture content remaining in the switchboard was measured using the KS C 2101:2017 test standard (KF coulometric titration method). A lower moisture content indicates better spontaneous volatility of the insulating cleaning agent composition of Manufacturing Example 1 after cleaning.

[0062] [Table 2]

[0063] As shown in Table 2 above, a comparison of Comparative Examples 1 and 2 and Example 1 in terms of the content and carbon number of individual compounds forming n-paraffins reveals that when the sum of the content of n-undecane, n-dodecane, and n-tridecane satisfies 87% by weight or more based on the total weight of the insulating cleaning agent composition, the dielectric breakdown voltage reaches 100kV or more, the insulation of the insulator is not effectively broken down, the moisture content remaining in the switchboard is remarkably low, and the spontaneous volatility is excellent.

[0064] Furthermore, comparing Comparative Example 1 and Example 1 in terms of the content and carbon number of the individual compounds forming n-paraffins, it can be inferred that when the sum of the content of n-undecane, n-dodecane, and n-tridecane satisfies 87% by weight or more based on the total weight of the insulating cleaning agent composition, the ignition point is raised and the occurrence of fire can be effectively prevented.

[0065] [Experimental Example 2: Viscosity Measurement of Insulating Cleaning Agent Composition] The kinematic viscosity of the insulating cleaning agent compositions from Comparative Examples 1-3 and Example 1 at 40°C was measured in accordance with the ASTM D445 test standard.

[0066] [Table 3]

[0067] Comparing Comparative Example 3 and Example 1 in Table 3 from the viewpoint of the content of individual compounds forming n-paraffins and the number of carbon atoms, in the case of Comparative Example 3, as the content of n-paraffins with 13 and 14 carbon atoms increases, the kinematic viscosity of the insulating cleaning agent composition becomes excessively high, which can lead to a decrease in spontaneous evaporation performance and the problem of residue remaining after cleaning. On the other hand, in Example 1, as the kinematic viscosity decreases compared to Comparative Example 3, the spontaneous evaporation performance is excellent, and as a result, no residue may remain after cleaning.

[0068] Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art that utilize the basic concepts of the present invention as defined in the following claims also fall within the scope of the present invention.

Claims

1. n-decane, and n-Undecane, and n-dodecane, and n-Tridecane, and An insulating cleaning agent composition comprising n-tetradecane, It does not contain n-nonane. The aforementioned n-undecane, the aforementioned n-dodecane The sum of the content of n-tridecane and the insulating wash It is 87% by weight or more based on the total weight of the purifying agent composition. The aforementioned n-decane (6-13% by weight), and 30 to 45% by weight of n-undecane, and The aforementioned n-dodecane (28-35% by weight), and 20 to 27% by weight of the aforementioned n-tridecane, and The above contains 0.10 to 4.00% by weight of n-tetradecane. Hmm, an insulating cleaning agent composition.

2. In accordance with the KS C IEC 60156:2003 test standard, the insulating cleaning agent composition The insulating cleaning agent composition according to claim 1, wherein the dielectric breakdown voltage is 100 kV or more.

3. In accordance with the ASTM E-659 test standard, the ignition point of the insulating cleaning agent composition is 230°C. The insulating cleaning agent composition according to claim 1, wherein the temperature is above ℃.

4. The insulating cleaning agent composition according to claim 1, further comprising an additive.

5. The aforementioned additive is Isopropyl alcohol, 1,1-difluoroethane (1,1-Difluoroethane) (hane), 1,1,1,2-tetrafluoroethane (1,1,1,2-Tetrafl uoroethane, and pentafluoroethane The claim 4 includes one or more mixtures selected from the group consisting of ane). Insulating cleaning agent composition.

Images