CN115851382B - Insulating cleaning agent with hydrophobic function and preparation method thereof - Google Patents
Insulating cleaning agent with hydrophobic function and preparation method thereof Download PDFInfo
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- CN115851382B CN115851382B CN202111116589.8A CN202111116589A CN115851382B CN 115851382 B CN115851382 B CN 115851382B CN 202111116589 A CN202111116589 A CN 202111116589A CN 115851382 B CN115851382 B CN 115851382B
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Abstract
The invention relates to the technical field of cleaning agents, and provides an insulating cleaning agent with a hydrophobic function and a preparation method thereof. The application of the polydimethylsiloxane and the penetrating agent ensures that the cleaning agent can form a layer of water repellent film on the surface of an electric device while cleaning dirt on the surface of the electric device, thereby preventing the influence and damage of the water vapor condensation on the electric operation.
Description
Technical Field
The invention relates to the technical field of cleaning agents, in particular to an insulating cleaning agent with a hydrophobic function and a preparation method thereof.
Background
In the use process of the electrical equipment, impurities such as dust, salts, conductive particles, flocks, greasy dirt and the like are often accumulated on the surface of the electrical equipment due to the factors of atmospheric pollution, and the stains can damage the insulating performance of the electrical equipment and cause the problems of flashover, short circuit, signal loss, error code and the like. Therefore, under the normal working condition of the equipment, the cleaning of various stains causing equipment faults is a problem which needs to be solved by urgent need at present.
In the charged insulating cleaning, as the components of the cleaning agent are mostly volatile solvents, the cleaning agent absorbs heat of surrounding air and objects during volatilization, and water vapor in the air reaches saturated concentration under the condition of temperature reduction, and is condensed into water drops which are attached to electronic circuit boards and components to form conductive conditions, thus becoming accident potential.
CN 102191141B discloses a modified hydrocarbon cleaning agent, wherein alcohol additives, ester additives and ether additives are added into the hydrocarbon cleaning agent, so that the modified hydrocarbon cleaning agent has the advantages of strong cleaning power, high KB value, low aniline point, low cost, small odor and high recovery rate, and can be heated for cleaning in special equipment. However, the insulating cleaning agent lacks a component with a hydrophobic function, so that moisture in condensed air in the cleaning process is adhered to a circuit board, and short circuit and board burning phenomena are caused.
Disclosure of Invention
The invention provides an insulating cleaning agent with a hydrophobic function, which is characterized in that a protective film is formed on the surface of an electric element by adding a hydrophobic functional component, so that the damage of condensed water vapor in the air to electric equipment is avoided.
The technical scheme of the invention is as follows:
an insulating cleaning agent with a hydrophobic function comprises the following components: odorless D60, perfluoro-n-pentane, odorless D80, polydimethylsiloxane, dodecanol polyoxyethylene ether, penetrating agent, n-dodecane and hygroscopic agent.
Further, the insulating cleaning agent comprises the following components in parts by weight: 50-68 parts of odorless D, 5-8 parts of perfluoro-n-pentane, 10-15 parts of odorless D, 1-5 parts of polydimethylsiloxane, 0.5-1.0 part of dodecanol polyoxyethylene ether, 8-10 parts of penetrating agent, 10-20 parts of n-dodecane and 2-6 parts of hygroscopic agent.
Further, the insulating cleaning agent comprises the following components in parts by weight: 60 parts of odorless D, 6 parts of perfluoro-n-pentane, 80 parts of odorless D, 3 parts of polydimethylsiloxane, 0.8 part of dodecanol polyoxyethylene ether, 9 parts of penetrating agent, 15 parts of n-dodecane and 4 parts of moisture absorbent.
Further, the molecular weight of the polydimethylsiloxane is 100-200.
Further, the penetrating agent is ethyl siloxane.
Further, the ethyl siloxane has the formula:
。
still further, the ethylsiloxane has a molecular weight of 100 to 400.
Still further, the ethyl siloxane has a surface tension of 1.3X10 -4 N/cm.
Further, the moisture absorbent is N-methyl pyrrolidone.
The invention further provides a preparation method of the insulating cleaning agent, which comprises the following steps: mixing the above materials, stirring for 1.5-3 hr, and standing for 30-60 min.
The beneficial effects of the invention are as follows:
1. In the invention, odorless D60 and D80 with extremely low ODS value, low viscosity and low surface tension are used as base liquid, and an azeotropic mixture can be formed between the base liquid and perfluoro-n-pentane and n-dodecane, so that the gaseous cleaning of a circuit board is facilitated, and dirt such as dust, greasy dirt, acid-alkali salts and the like on the surface of a charged device can be effectively removed. The dodecanol polyoxyethylene ether, the moisture absorbent and the azeotrope can be completely dissolved, wherein the dodecanol polyoxyethylene ether has better surface activity, can remove polar and nonpolar stains, and can play a role in synergism with the azeotropic substances, thereby further accelerating the removal of the stains on the circuit board and the components; the moisture absorbent N-methyl pyrrolidone can prevent static electricity from generating and accumulating on the surfaces of the circuit board and the components.
2. The low molecular weight polymerized dimethyl siloxane and the penetrating agent ethyl siloxane adopted by the invention have good heat conducting property, and the heat dissipation of the components is not hindered when the components are attached to the components, but the heat dissipation is accelerated, and the normal use of electrical equipment is not influenced. On the other hand, the two components have excellent water repellent function, can cooperatively prevent the influence and damage of condensed water on electric operation, can be easily dissolved into azeotropic solutions consisting of D60, D80 and the like in any proportion, have good dispersibility, and can not form neoplasms which are difficult to dissolve and influence the formation of a water repellent film. The surface tension of the ethyl siloxane is as low as 1.3 multiplied by 10 -4 N/cm, the ethyl siloxane can permeate into tiny holes and gaps on a circuit board, the volatilization loss rate is less than 2.0%, the breakdown voltage is more than 14kV/mm (the standard is 10 kV/mm), a firm hydrophobic film can be formed between the ethyl siloxane and the low-molecular-weight polymerized dimethyl siloxane on the circuit board and components, and even if the cleaning agent volatilizes to cause condensation of water drops in the air, the components can be effectively protected from being influenced by moisture, and the electric conduction phenomenon is avoided.
3. The moisture absorbent N-methyl pyrrolidone adopted by the invention has a moisture absorption function, can absorb moisture in air, is fixed in a molecular structure in the form of intermolecular combined water, can increase the dielectric constant of molecules, prevent static electricity from being generated and accumulated, can not reduce the insulating function of the cleaning agent, and can also improve the flash point and the ignition point of the cleaning agent together with perfluoro-N-pentane, so that the cleaning agent has higher safety.
4. The insulating cleaning agent provided by the invention does not contain substances which destroy ozone layers, has no adverse effect on the environment, is nontoxic, and has no effect on human health.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The insulating cleaning agent comprises the following components in parts by weight: 60 parts of odorless D, 6 parts of perfluoro-N-pentane, 80 parts of odorless D, 3 parts of polydimethylsiloxane (molecular weight 162), 0.8 part of dodecanol polyoxyethylene ether, 9 parts of ethyl siloxane (molecular weight 120.22), 15 parts of N-dodecane and 4 parts of N-methylpyrrolidone.
The preparation method comprises the following steps: weighing the components, adding into a reaction kettle, mixing and stirring for 2 hours at 30 ℃, standing for 40min, inspecting and packaging to obtain the finished product.
Example 2
The insulating cleaning agent comprises the following components in parts by weight: the anti-odor D60 comprises, by weight, an anti-odor D60 of 8 parts of perfluoro-N-pentane, an anti-odor D80 of 10 parts, a polydimethylsiloxane (molecular weight 162) of 5 parts, a dodecanol polyoxyethylene ether of 0.5 part, an ethyl siloxane (molecular weight 120.22) of 8 parts, an N-dodecane of 10 parts and an N-methylpyrrolidone of 6 parts.
The preparation method comprises the following steps: weighing the components, adding into a reaction kettle, mixing and stirring at 35 ℃ for 1.5 hours, standing for 60 minutes, inspecting and packaging.
Example 3
The insulating cleaning agent comprises the following components in parts by weight: 60 parts of odorless D60, 5 parts of perfluoro-N-pentane, 80 parts of odorless D80, 1 part of polydimethylsiloxane (molecular weight 162), 1.0 part of dodecanol polyoxyethylene ether, 10 parts of ethyl siloxane (molecular weight 120.22), 20 parts of N-dodecane and 2 parts of N-methylpyrrolidone.
The preparation method comprises the following steps: weighing the components, adding into a reaction kettle, mixing and stirring for 3 hours at 25 ℃, standing for 30min, inspecting and packaging to obtain the finished product.
Comparative example 1
Polydimethylsiloxane having a molecular weight of 296 was employed, the remainder being the same as in example 1.
Comparative example 2
An ethyl siloxane having a molecular weight of 377 was used, the remainder being the same as in example 1.
Comparative example 3
Hexamethyl siloxane was used instead of ethyl siloxane, with the remainder being as in example 1.
Comparative example 4
Octamethylsiloxane was used instead of ethylsiloxane, with the remainder being the same as in example 1.
Comparative example 5
Decafluoropentane was used instead of perfluoro-n-pentane, with the remainder being as in example 1.
Experimental example 1 comparison of Using effects of different insulating cleaners
The insulating cleaners of examples 1 to 3 and comparative examples 1 to 5 were used to clean the circuit boards, respectively, and the use effects are shown in Table 1. And the cleaned circuit board is powered on, and after 3 hours, the temperature of the surface of the circuit board is measured, and the result is shown in Table 1.
After 1 month, the circuit board was again cleaned with each cleaning agent, and the surface of the circuit board was observed for the presence of insoluble substances, and the results are shown in table 1.
Table 1 different cleaning agent use effects
The data in Table 1 show that the insulating cleaning agent has good cleaning effect. The comparative examples 1 to 5, in which some components were adjusted, although a good cleaning effect on the circuit board was also achieved, were not yet effective in the examples of the present invention, which showed that any one of the components of the insulating cleaning agent of the present invention was strictly screened, and in addition to each of the components having its own function in the system, a close relationship was formed with the other components, and a cleaning function was synergistically exhibited. Among them, in particular, in comparative example 5, decafluoropentane was used instead of perfluoro-n-pentane, which could not form a good azeotropic system with other components of the present invention, resulting in a decrease in the cleaning ability of the cleaning agent.
In addition, as the invention adopts the low-molecular-weight dimethyl siloxane and the ethyl siloxane which have good heat conduction performance, the dimethyl siloxane and the ethyl siloxane which are attached to the components can not obstruct the heat dissipation of the components, but can accelerate the heat dissipation, and the low-molecular-weight dimethyl siloxane and the ethyl siloxane can be easily dissolved into the base solution of D60 and D80 when the circuit board is cleaned again, and neoplasms which are difficult to dissolve can not be formed. Therefore, after the circuit board cleaned by the cleaning agent is continuously used for 3 hours, the surface temperature is maintained at about 38 ℃, the cleaning agent is reused, and insoluble substances are not generated on the surface. Comparative examples 1 and 2 used dimethyl siloxane and ethyl siloxane with higher molecular weights, respectively, not only hindered the heat dissipation of components, resulting in higher surface temperature of the circuit board, but also formed insoluble neoplasms on the surface of the circuit board after cleaning again with the cleaning agent. Comparative examples 3 and 4 each use different kinds of siloxane instead of ethyl siloxane, and their heat conductive ability is lowered to hinder heat dissipation of the electric element, resulting in an increase in the surface temperature of the circuit board, and these two kinds of siloxanes are inferior in compatibility in the base liquid of the present invention, and a small amount of insoluble neoplasms also occur when they are used again. In comparative example 5, decafluoropentane is used instead of perfluoro-n-pentane, and is a common cleaning agent component, but the decafluoropentane cannot form a good azeotropic system with other components of the invention, the cleaning capability is reduced, the influence on the surface temperature of a circuit board is small, and insoluble substances cannot appear after the circuit board is reused.
Experimental example 2 comparison of the protective effects of different insulating cleaners on Circuit Board
After the circuit boards were cleaned by using the insulating cleaning agents of examples 1 to 3 and comparative examples 1 to 5, the cleaned circuit boards were placed in an environment of 38℃and 90% humidity for 3 months, and the corrosion conditions of the surfaces of the circuit boards were observed, and the results are shown in Table 2.
TABLE 2 Effect of different cleaning agents on protecting Circuit Board
As can be seen from the data in table 2, after the insulating cleaning agent provided by the embodiment of the invention is used for 3 months, the surface of the circuit board is still smooth and clean, and no corrosion phenomenon occurs, which indicates that the insulating cleaning agent forms a layer of compact water-repellent film on the surface of the circuit board, and in an environment with higher humidity, along with volatilization of the cleaning agent, water in the air is condensed into water drops to adhere to the surface of the circuit board, but due to the existence of the water-repellent film, the corrosion effect of the water drops on the circuit board is effectively avoided.
Comparative examples 1 and 2 used polymerized dimethylsiloxane and ethylsiloxane having higher molecular weights, respectively, were relatively poor in dispersibility in the D60 and D80 base liquids, resulting in non-uniformity of the final "water repellent film", and the water repellent film formed on the surface of the circuit board was liable to have "holes", failed to completely repel water, corrosion, and short circuits. Comparative examples 3 and 4 respectively use different kinds of siloxanes instead of ethyl siloxane, the permeability of the cleaning agent is reduced, and the cleaning agent cannot permeate into micro holes and gaps on the circuit board to form a compact water-repellent film, so that serious corrosion phenomena occur in the gaps and the holes after the cleaning agent is placed in a high-humidity environment for 3 months. In comparative example 5, decafluoropentane is used to replace perfluoro-n-pentane, and decafluoropentane cannot form a good azeotropic system with other components, so that not only is the cleaning capability of the cleaning agent reduced, but also the formation of a water repellent film is affected, and therefore, the corrosion phenomenon also occurs on the surface of the circuit board.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. The insulating cleaning agent with the hydrophobic function is characterized by comprising the following components: odorless D60, perfluoro-n-pentane, odorless D80, polydimethylsiloxane, dodecanol polyoxyethylene ether, penetrating agent, n-dodecane and hygroscopic agent;
the molecular weight of the polydimethylsiloxane is 100-200;
The penetrating agent is ethyl siloxane;
the molecular weight of the ethyl siloxane is 120.22;
The insulating cleaning agent comprises the following components in parts by weight: 50-68 parts of odorless D, 5-8 parts of perfluoro-n-pentane, 10-15 parts of odorless D, 1-5 parts of polydimethylsiloxane, 0.5-1.0 part of dodecanol polyoxyethylene ether, 8-10 parts of penetrating agent, 10-20 parts of n-dodecane and 2-6 parts of hygroscopic agent.
2. The insulating cleaning agent with the hydrophobic function according to claim 1, which is characterized by comprising the following components in parts by weight: 60 parts of odorless D, 6 parts of perfluoro-n-pentane, 80 parts of odorless D, 3 parts of polydimethylsiloxane, 0.8 part of dodecanol polyoxyethylene ether, 9 parts of penetrating agent, 15 parts of n-dodecane and 4 parts of moisture absorbent.
3. The insulating cleaning agent with hydrophobic function according to claim 1, wherein the moisture absorbent is N-methylpyrrolidone.
4. A method for preparing the insulating cleaning agent with hydrophobic function as claimed in any one of claims 1 to 3, comprising the following steps: mixing the above materials, stirring for 1.5-3 hr, and standing for 30-60 min.
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| CN202111116589.8A CN115851382B (en) | 2021-09-23 | 2021-09-23 | Insulating cleaning agent with hydrophobic function and preparation method thereof |
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| CN115851382A CN115851382A (en) | 2023-03-28 |
| CN115851382B true CN115851382B (en) | 2024-07-19 |
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| CN117448095A (en) * | 2023-10-27 | 2024-01-26 | 北京华美京电电力技术开发有限公司 | Preparation method of insulation cleaning agent with water-repellent and anti-static function |
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| JPH05287300A (en) * | 1992-04-06 | 1993-11-02 | Asahi Chem Ind Co Ltd | Detergent composition |
| US5750488A (en) * | 1996-01-04 | 1998-05-12 | Crc Industries, Inc. | Fluorinated cleaning solvents |
| CN103013709A (en) * | 2012-12-19 | 2013-04-03 | 长沙艾森设备维护技术有限公司 | Cleaning agent for electric mechanical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004078898A1 (en) * | 2003-03-06 | 2004-09-16 | Tokuyama Corporation | Antistatic detergent |
| US7531497B2 (en) * | 2004-10-08 | 2009-05-12 | The Procter & Gamble Company | Personal care composition containing a cleansing phase and a benefit phase |
| CN102191141B (en) * | 2010-03-17 | 2013-01-30 | 东莞市新球清洗科技有限公司 | A modified hydrocarbon cleaning agent |
| CN104818494A (en) * | 2015-04-30 | 2015-08-05 | 青岛千帆高新技术有限公司 | Pipeline cleaning agent |
| CN106929872A (en) * | 2017-04-24 | 2017-07-07 | 施玉芳 | A kind of movable metallic part cleaning agent |
| CN108342738B (en) * | 2018-01-18 | 2021-03-23 | 长沙艾森设备维护技术有限公司 | Water-based cleaning agent for nuclear power equipment and preparation method thereof |
| CN111454781A (en) * | 2020-03-25 | 2020-07-28 | 苏州神尔能源科技有限公司 | A highly insulating mixed liquid that can be used for cleaning high-voltage power equipment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05287300A (en) * | 1992-04-06 | 1993-11-02 | Asahi Chem Ind Co Ltd | Detergent composition |
| US5750488A (en) * | 1996-01-04 | 1998-05-12 | Crc Industries, Inc. | Fluorinated cleaning solvents |
| CN103013709A (en) * | 2012-12-19 | 2013-04-03 | 长沙艾森设备维护技术有限公司 | Cleaning agent for electric mechanical equipment |
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