An environment-friendly normal-temperature cleaning agent, a preparation method and application thereof

Abstract

The application provides an environment-friendly normal-temperature cleaning agent and a preparation method and application thereof. Components of the environment-friendly normal-temperature cleaning agent include trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol and alkyl diethanolamide. The trisiloxane alkanolamide, the ethoxylated-propoxylated fatty alcohol and the alkyl diethanolamide in the environment-friendly normal-temperature cleaning agent of the application are used in combination, have a synergistic effect, can make the environment-friendly normal-temperature cleaning agent have super strong wetting and cleaning power, excellent low-foaming and foam-controlling performance, and good slow-release effects on ferrous metals and non-ferrous metals, and have good metal protection capacity.

Description

Technical Field

[0001] This invention belongs to the field of cleaning agent technology, and relates to an environmentally friendly room temperature cleaning agent, its preparation method and application. Background Technology

[0002] Metal parts are an indispensable product in the manufacturing industry. During the production process, metal parts typically undergo milling, drilling, and grinding, inevitably involving the use of mineral oils, synthetic esters, lubricants, additives, and rust inhibitors. The heat and extreme pressure generated during processing can cause these additives to react with each other or with the metal powder, aging into dirt that is difficult to saponify or emulsify. This dirt then adheres to the metal surface. Therefore, cleaning agents are often needed to remove these dirt during the processing of metal parts.

[0003] CN110387550A discloses a preparation process for an environmentally friendly water-based metal cleaning agent, which is made from the following raw materials in parts by weight: glycerol, triallyl isocyanurate, 1,4-dioxane, dimethyl carbonate catalyst, sodium hydroxide, triglyceride, anti-foaming redeposition agent, solubilizer, defoamer, emulsifier, o-phenylenediamine, and deionized water. The cleaning agent obtained by this invention is weakly alkaline and will not corrode metal workpieces during use. It does not require heating during use and will not produce acid mist that could harm the human body, greatly improving the environmental friendliness, emulsification stability, and anti-foaming redeposition properties of the water-based metal cleaning agent.

[0004] CN111549351A discloses a highly effective and environmentally friendly metal surface oil stain cleaner and its preparation method, which includes surfactant A, surfactant B, nonionic surfactant, additive A, additive B, corrosion inhibitor and other components. The cleaner prepared by this invention has excellent metal oil stain removal effect and certain anti-rust and anti-corrosion properties for metal surfaces. It can be used for mixed cleaning of ferrous metals, non-ferrous metals and rare metals, and has high practicality.

[0005] While existing technologies offer cleaning agents for metal surfaces, most require heat treatment to effectively remove dirt and offer limited rust prevention, causing inconvenience in practical applications. Therefore, there is a need in this field to develop an environmentally friendly, safe, and room-temperature-resistant water-based cleaning agent to meet these application requirements. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide an environmentally friendly room-temperature cleaning agent, its preparation method, and its application. This environmentally friendly room-temperature cleaning agent not only provides excellent cleaning results for metal surfaces at room temperature, but also exhibits strong rust prevention capabilities and is more environmentally friendly and safer.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides an environmentally friendly room temperature cleaning agent, wherein the components of the environmentally friendly room temperature cleaning agent include trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol and alkyl diethanolamide.

[0009] The trisiloxane alkanolamide in the environmentally friendly room-temperature cleaning agent of this invention has a lower surface tension than traditional nonionic surfactants. It can quickly reduce the surface tension of oil stains on metal parts at room temperature (30-40℃), thereby rapidly wetting and dispersing the oil stains, while also exhibiting low foaming properties. Ethoxylated-propoxylated fatty alcohols and alkyl diethanolamides can both solubilize and stabilize the product, improve the resistance of ferrous metal parts to damp heat, and slow down the corrosion of non-ferrous metals. The combination of these three has a synergistic effect, giving the environmentally friendly room-temperature cleaning agent super-strong wetting and cleaning power, excellent low-foaming and foam-controlling properties, and good slow-release effect on both ferrous and non-ferrous metals, providing excellent metal protection.

[0010] Preferably, the mass ratio of the trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol, and alkyl diethanolamide is (0.3-0.7):(1.5-2):(0.3-0.5).

[0011] "0.3-0.7" can be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7, etc.

[0012] "1.5-2" can be 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95 or 2, etc.

[0013] "0.3-0.5" can be 0.3, 0.32, 0.35, 0.38, 0.4, 0.42, 0.45, 0.48 or 0.5, etc.

[0014] Preferably, the structure of the trisiloxane alkanolamide is as follows:

[0015]

[0016] R is selected from C6-C8 (e.g., C6, C7, or C8).

[0017] In this invention, the trisiloxane alkanolamide uses the specific structure described above. The non-polar groups of the siloxane in this structure can reduce the surface tension of non-polar groups such as grease, and the hydrophilic group is a C6-C8 alkylolamide. The siloxane in this structure also has a non-polar group, similar to hydrocarbon cleaning agents, which can quickly reduce the surface tension of oil stains, thereby promoting the rapid dispersion and dissolution of oil stains in the cleaning agent system.

[0018] Preferably, the ethoxylated-propoxylated fatty alcohol includes ethoxylated-propoxylated C10-12 alcohol.

[0019] In this invention, the fatty alcohol modified by EO / PO not only reduces the surface tension of oil stains, but also has a certain emulsifying ability. When combined with trisiloxane alkanolamide, it can effectively suppress the foam of the system and give it a lower foaming height.

[0020] Preferably, the alkyl diethanolamide is a C12-C16 alkyl diethanolamide, such as a C12 alkyl diethanolamide, C13 alkyl diethanolamide, C14 alkyl diethanolamide, C15 alkyl diethanolamide, or C16 alkyl diethanolamide.

[0021] As a preferred technical solution of the present invention, the C12-C16 alkyl diethanolamide not only has good rust prevention properties, but also has good dirt-carrying capacity, thereby improving the cleaning and rust prevention performance.

[0022] Preferably, the components of the environmentally friendly room temperature cleaning agent further include any one or a combination of at least two of organic amines, organic phosphoric acid, corrosion inhibitors, or rust inhibitors.

[0023] Preferably, the organic amine includes 2-aminoethanol and / or triethanolamine.

[0024] In this invention, the organic amine can adjust the pH of the system in the cleaning agent to ensure the basic cleaning power and rust prevention of iron.

[0025] Preferably, the organophosphoric acid includes octylphosphoric acid and / or aminotrimethylphosphoric acid; the organophosphoric acid is capable of protecting non-ferrous metals such as aluminum and copper.

[0026] Preferably, the corrosion inhibitor comprises benzotriazole.

[0027] Preferably, the rust inhibitor includes any one or a combination of at least two of isononanoic acid, sebacic acid, lauric acid, or C10-C12 diacids.

[0028] In this invention, the rust inhibitor is selected from the above-mentioned organic acid, which can provide a certain degree of rust protection for metals and also buffer the pH of the cleaning agent system.

[0029] Preferably, the components of the environmentally friendly room temperature cleaning agent, by weight, include 0.3-0.7 parts of trisiloxane alkanolamide, 1.5-2 parts of ethoxylated-propoxylated fatty alcohol, 0.3-0.5 parts of alkyl diethanolamide, 4-18 parts of organic amine, 1-5 parts of organic phosphonic acid, 0.1-1 parts of corrosion inhibitor, 5-10 parts of rust inhibitor, and soft water.

[0030] The amount of trisiloxane alkanolamide added in the environmentally friendly room temperature cleaning agent of the present invention can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, 0.55 parts, 0.6 parts, 0.65 parts, or 0.7 parts, etc.;

[0031] The amount of ethoxylated-propoxylated fatty alcohol added can be 1.5 parts, 1.55 parts, 1.6 parts, 1.65 parts, 1.7 parts, 1.75 parts, 1.8 parts, 1.85 parts, 1.9 parts, 1.95 parts, or 2 parts, etc.

[0032] The amount of alkyl diethanolamide added can be 0.3 parts, 0.32 parts, 0.35 parts, 0.38 parts, 0.4 parts, 0.42 parts, 0.45 parts, 0.48 parts, or 0.5 parts, etc.;

[0033] The amount of organic amine added can be 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, or 18 parts, etc.

[0034] The amount of organophosphonic acid added can be 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, or 4.5 parts, etc.;

[0035] The amount of corrosion inhibitor added can be 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1 part, etc.;

[0036] The amount of rust inhibitor added can be 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, or 10 parts, etc.

[0037] Other specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0038] Secondly, the present invention provides a method for preparing an environmentally friendly room-temperature cleaning agent as described in the first aspect, the method comprising the following steps:

[0039] Trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol, and alkyl diethanolamide were mixed with soft water to obtain the environmentally friendly room temperature cleaning agent.

[0040] Preferably, the mixing process further includes adding any one or a combination of at least two of organic amines, organophosphonic acids, corrosion inhibitors, or rust inhibitors.

[0041] Preferably, the mixing temperature is 25-35℃ (e.g., 26℃, 28℃, 30℃, 32℃, or 34℃), the mixing speed is 50-100 r / min (e.g., 55 r / min, 60 r / min, 70 r / min, 80 r / min, 90 r / min, or 95 r / min), and the mixing time is 0.5-1.5 h (e.g., 0.6 h, 0.8 h, 1 h, 1.2 h, or 1.4 h).

[0042] Other specific point values ​​within the above range can be selected, and will not be elaborated on here.

[0043] Thirdly, the present invention provides the application of the environmentally friendly room temperature cleaning agent as described in the first aspect in cleaning metal parts.

[0044] Compared with the prior art, the present invention has at least the following beneficial effects:

[0045] (1) In this invention, the combination of trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol and alkyl diethanolamide has a synergistic effect, which enables the environmentally friendly room temperature cleaning agent to have super wetting and cleaning power at room temperature (30-40℃), excellent low foam and foam control performance. When a carbon steel test piece coated with mineral oil and synthetic ester is rinsed in the cleaning agent for 1 minute, the oil removal capacity reaches more than 84%, and the foam height is <20cm after circulating at 30-40℃ for 0.5 hours.

[0046] (2) The environmentally friendly room temperature cleaning agent provided by the present invention has a good slow-release effect on both ferrous and non-ferrous metals and has a good metal protection ability. After cleaning, the carbon steel test piece is suspended in a humid chamber (50°C, 95% humidity) for 24 hours without rusting. The standard aluminum sheet is immersed in the cleaning agent at 55°C for 30 minutes without blackening.

[0047] (3) The preparation method of the environmentally friendly room temperature cleaning agent provided by the present invention is simple and easy to industrialize. Detailed Implementation

[0048] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0049] The trisiloxane alkanolamides used in Examples 1-3 and Examples 5-11 of this invention were all prepared using the following method:

[0050] Add heptamethyltrisiloxane to deionized water and stir for 1 hour at a temperature not exceeding 25°C until the sample is uniformly transparent and free of oil droplets. Then add the corresponding alkanolamide to the sample and stir for 30 minutes at a temperature not exceeding 25°C until the sample is uniformly transparent.

[0051] The trisiloxane alkanolamide used in Example 4 of this invention was prepared by the following method:

[0052] Add heptamethyltrisiloxane to deionized water and stir for 30 minutes at a temperature not exceeding 25°C. Add a small amount of 25% hydrofluoric acid and continue stirring for another 30 minutes until the sample is uniformly transparent. Then add the corresponding alkanolamide to the sample and continue stirring for 30 minutes until the sample is uniformly transparent.

[0053] The alkyl diethanolamides used in Examples 1-11 of this invention are synthesized from diethanolamine and the corresponding fatty acids.

[0054] The structures of the trisiloxane alkanolamide and alkyl diethanolamide used in the examples are shown in Table 1:

[0055] Table 1

[0056]

[0057]

[0058] The ethoxylated-propoxylated fatty alcohols used in the examples were all purchased from Zhejiang Huangma Technology Co., Ltd. (HML-1039R).

[0059] Other raw materials can be used as long as they are purchased from authorized distributors.

[0060] Example 1

[0061] This embodiment provides an environmentally friendly room temperature cleaning agent. The components of the environmentally friendly room temperature cleaning agent, by weight, include: 0.5 parts of trisiloxane alkanolamide, 1.8 parts of ethoxylated-propoxylated C10 fatty alcohol, 0.3 parts of dodecyl diethanolamide, 12 parts of 2-aminoethanol, 1.5 parts of aminotrimethylphosphonic acid, 5 parts of triethanolamine, 0.5 parts of benzotriazole, 3 parts of sebacic acid, 4 parts of lauric acid, and soft water to make up to 100 parts.

[0062] The preparation method of the environmentally friendly room temperature cleaning agent is as follows:

[0063] The environmentally friendly room temperature cleaning agent is obtained by mixing trisiloxane alkanolamide, ethoxylated-propoxylated C10 fatty alcohol, dodecyl diethanolamide, 2-aminoethanol, aminotrimethylphosphoric acid, triethanolamine, benzotriazole, sebacic acid, lauric acid and soft water at 30°C and 80 r / min for 1 h.

[0064] Example 2

[0065] This embodiment provides an environmentally friendly room temperature cleaning agent. The components of the environmentally friendly room temperature cleaning agent, by weight, include: 0.4 parts of trisiloxane alkanolamide, 1.5 parts of ethoxylated-propoxylated C12 fatty alcohol, 0.5 parts of tetradecyl diethanolamide, 12 parts of 2-aminoethanol, 1 part of octyl phosphate, 0.3 parts of benzotriazole, 5 parts of sebacic acid, 3 parts of isononanoic acid, and soft water to make up to 100 parts.

[0066] The preparation method of the cleaning agent is as described in Example 1.

[0067] Example 3

[0068] This embodiment provides an environmentally friendly room temperature cleaning agent. The components of the environmentally friendly room temperature cleaning agent, by weight, include: 0.7 parts of trisiloxane alkanolamide, 2 parts of ethoxylated-propoxylated C10 fatty alcohol, 0.4 parts of hexadecyl diethanolamide, 10 parts of 2-aminoethanol, 0.5 parts of aminotrimethylphosphonic acid, 3 parts of triethanolamine, 0.1 parts of benzotriazole, 8 parts of nonanedioic acid, and soft water to make up to 100 parts.

[0069] The preparation method of the cleaning agent is as described in Example 1.

[0070] Example 4

[0071] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and that in Example 1 is the structure of the trisiloxane alkanolamide. The amount of trisiloxane alkanolamide added remains unchanged, while the other raw materials and proportions remain the same. The preparation method is the same as in Example 1.

[0072] Example 5

[0073] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between the environmentally friendly room temperature cleaning agent and that in Example 1 is that R in the trisiloxane alkanolamide is a C10 alkanolamide, and the amount of trisiloxane alkanolamide added remains unchanged. Other raw materials and proportions remain unchanged, and the preparation method is the same as in Example 1.

[0074] Example 6

[0075] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between the environmentally friendly room temperature cleaning agent and that in Example 1 is that R in the trisiloxane alkanolamide is a C4 alkanolamide, and the amount of trisiloxane alkanolamide added remains unchanged. Other raw materials and proportions remain unchanged, and the preparation method is the same as in Example 1.

[0076] Example 7

[0077] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between the environmentally friendly room temperature cleaning agent and that in Example 1 is that the alkyl diethanolamide is a C10 alkyl diethanolamide, and the amount of alkyl diethanolamide added remains unchanged. Other raw materials and proportions remain unchanged, and the preparation method is the same as in Example 1.

[0078] Example 8

[0079] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between the environmentally friendly room temperature cleaning agent and that in Example 1 is that the alkyl diethanolamide is a C18 alkyl diethanolamide, and the amount of alkyl diethanolamide added remains unchanged. Other raw materials and proportions remain unchanged, and the preparation method is the same as in Example 1.

[0080] Example 9

[0081] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and that in Example 1 is that it does not contain a rust inhibitor. The reduction in rust inhibitor is made up by soft water. Other raw materials and proportions remain unchanged. The preparation method is the same as in Example 1.

[0082] Example 10

[0083] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and that in Example 1 is that it does not contain organic phosphoric acid. The reduction in phosphoric acid is made up by soft water. Other raw materials and proportions remain unchanged. The preparation method is the same as in Example 1.

[0084] Example 11

[0085] This embodiment provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and that in Example 1 is that it does not contain organic amines. The reduction in organic amines is made up by soft water. Other raw materials and proportions remain unchanged. The preparation method is the same as in Example 1.

[0086] Comparative Example 1

[0087] This comparative example provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and Example 1 is that it does not include trisiloxane alkanolamide. The reduced amount of trisiloxane alkanolamide is allocated to ethoxylated-propoxylated C10 fatty alcohol and dodecyl diethanolamide in a proportional ratio. Other raw materials and proportions remain unchanged. The preparation method is the same as in Example 1.

[0088] Comparative Example 2

[0089] This comparative example provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and Example 1 is that it does not include ethoxylated-propoxylated C10 fatty alcohol. The reduced amount of ethoxylated-propoxylated C10 fatty alcohol is allocated to trisiloxane alkanolamide and dodecyl diethanolamide in a proportional ratio. Other raw materials and ratios remain unchanged, and the preparation method is the same as in Example 1.

[0090] Comparative Example 3

[0091] This comparative example provides an environmentally friendly room temperature cleaning agent. The only difference between this environmentally friendly room temperature cleaning agent and Example 1 is that it does not contain dodecyl diethanolamide. The reduced amount of dodecyl diethanolamide is allocated to trisiloxane alkanolamide and ethoxylated-propoxylated C10 fatty alcohol in a proportional ratio. Other raw materials and proportions remain unchanged, and the preparation method is the same as in Example 1.

[0092] Test Example 1: Static Surface Tension Test

[0093] Test method: The samples of Examples 1-8, Comparative Examples 1-3 and commercially available samples were diluted with tap water to a concentration of 3%, and then static surface tension was tested using a static surface tension meter. The results are shown in Table 2.

[0094] Table 2

[0095] Example 1 24.7 Example 2 25.4 Example 3 25.7 Example 4 29.5 Example 5 27.3 Example 6 28.4 Example 7 24.6 Example 8 25.3 Comparative Example 1 35.2 Comparative Example 2 32.7 Comparative Example 3 31.4 Commercially available samples 40.1

[0096] Test Example 2: Wetting Performance Test

[0097] (1) Sample preparation: Thirteen Q-panel R36 (plain carbon steel) pieces of the same area were cleaned with petroleum ether steam, then dipped in a mixture of synthetic ester and mineral oil, and hung indoors at room temperature for 24 hours.

[0098] (2) Dilute the samples of Examples 1-8, Comparative Examples 1-3 and commercially available samples with tap water to a concentration of 3%. Use a microsyringe to take 10 microliters of the test sample and drop it onto the upper part of the test piece (the test piece is fixed at a 45-degree angle). The droplet will move downwards due to gravity. The wider and longer the trace left by the droplet, the better the wetting effect of the test cleaning agent on the oil on the test piece.

[0099] The evaluation levels are shown in Table 3.

[0100] Table 3

[0101] Level 1 Wetting width greater than 3mm and length greater than 10cm Level 2 Wetting width greater than 3mm and length greater than 5cm Level 3 Wetting width less than 3mm and length less than 5cm Level 4 Wetting has no width or a point

[0102] The results are shown in Table 4.

[0103] Table 4

[0104]

[0105]

[0106] Test Example 3 Cleaning Rate Test

[0107] (1) Sample preparation: Thirteen Q-panel R36 (plain carbon steel) with the same area were cleaned with petroleum ether steam, then dipped in a mixture of synthetic ester and mineral oil, hung indoors at room temperature for 24 hours, and the weight of the sample after dipped in the oil film was recorded.

[0108] (2) Dilute the samples of Examples 1-8, Comparative Examples 1-3, and commercially available samples with tap water to a concentration of 3%. Then, immerse the test pieces from step (1) in the diluted cleaning solution and wash them back and forth for 2 minutes. After removing them and hanging them at room temperature for 24 hours, test the weight of the test pieces after cleaning. Calculate the oil removal rate by measuring the weight change of the test pieces before and after cleaning. The results are shown in Table 5.

[0109] Table 5

[0110]

[0111]

[0112] Test Example 4 Rust and Corrosion Prevention Test

[0113] (1) Test piece preparation: Clean fifteen Q-panel R36 (plain carbon steel) pieces of the same area with petroleum ether steam;

[0114] (2) Sample preparation: Dilute the samples of Examples 1-11, Comparative Examples 1-3 and commercially available samples with tap water to a concentration of 3%;

[0115] (3) Rust prevention test: Then immerse the test pieces from step (1) into the cleaning solution prepared in step (2), and wash them back and forth for 1 minute. After taking them out and hanging them at room temperature for 24 hours, place the test pieces in a humid heat chamber (50℃ / 95% humidity) and observe the rust condition of the test pieces at time points of 2h, 4h, 8h, 16h and 24h respectively.

[0116] (4) Corrosion test: Half of the standard aluminum sheet is immersed in the cleaning solution prepared in step (2), and the other half is exposed to air. After being placed in a constant temperature water bath at 55°C for 30 minutes, the corrosion of the aluminum sheet is observed (by comparing the immersed aluminum sheet with the unimmersed aluminum sheet).

[0117] The results are shown in Table 6.

[0118] Table 6

[0119]

[0120]

[0121] Test Example 5: Foam Performance Test

[0122] The foam performance was evaluated using a small high-pressure spray cleaning device. The smaller the foam height value, the better the foam performance.

[0123] The test conditions were as follows: the samples of Examples 1-8, Comparative Examples 1-3 and commercially available samples were diluted with tap water to a concentration of 3%, and the highest foam height was recorded after circulating at 0.3 MPa and 50-55°C for 0.5 h and 24 h.

[0124] The results are shown in Table 7.

[0125] Table 7

[0126] Example 1 15 0.5 Example 2 14 0.7 Example 3 16 1 Example 4 22 8 Example 5 19 5 Example 6 20 5 Example 7 17 4 Example 8 19 5 Comparative Example 1 30 16 Comparative Example 2 25 16 Comparative Example 3 27 13 Commercially available samples 20 10

[0127] As can be seen from the test data in Table 2-7, the environmentally friendly room temperature cleaning agent of the present invention has better performance than commercially available products in reducing the surface tension of oil stains, cleaning rate of oil stains, wetting performance, and rust and corrosion prevention. The environmentally friendly room temperature cleaning agent prepared in Examples 1-3 has a surface tension of less than 26 mN / m after treating the test pieces, a cleaning rate of more than 84% for oil stains, and a wetting grade of 1. The cleaned carbon steel test pieces showed no rust after being suspended in a humid chamber (50°C, 95% humidity) for 24 hours. The standard aluminum sheet immersed in the cleaning agent at 55°C for 30 minutes did not turn black. The foam height was <20 cm after 0.5 hours of circulation at 30-40°C and ≤1 cm after 24 hours of circulation, demonstrating excellent foam control performance.

[0128] As can be seen from Examples 4-6, the structure of trisiloxane alkanolamide and the number of carbon atoms in the alkanolamide have an impact on the cleaning agent's ability to reduce the surface tension of oil stains, its cleaning rate of oil stains, its wetting performance, and its rust and corrosion prevention effects.

[0129] As can be seen from Examples 7-8, the alkyl diethanolamide specifically selected in this invention can improve the cleaning effect of the cleaning agent on oil stains.

[0130] As can be seen from Examples 9-11, the absence of any one of the rust inhibitor, organophosphate, and organic amine in the cleaning agent will have a negative impact on the rust and corrosion prevention effect of the cleaning agent.

[0131] As can be seen from Comparative Examples 1-3, the combination of the trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol, and alkyl diethanolamide has a synergistic effect, and the absence of any one of them will significantly reduce the performance of the cleaning agent.

[0132] The applicant declares that this invention illustrates the environmentally friendly room-temperature cleaning agent, its preparation method, and its application through the above embodiments. However, this invention is not limited to the above embodiments, meaning that this invention does not necessarily rely on the above embodiments for implementation. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of the raw materials in the product, addition of auxiliary components, and selection of specific methods, all fall within the protection and disclosure scope of this invention.

Claims

1. An environmentally friendly room-temperature cleaning agent, characterized in that, The environmentally friendly room temperature cleaning agent comprises, by weight, 0.3-0.7 parts of trisiloxane alkanolamide, 1.5-2 parts of ethoxylated-propoxylated fatty alcohol, 0.3-0.5 parts of alkyl diethanolamide, 4-18 parts of organic amine, 1-5 parts of organic phosphonic acid, 0.1-1 parts of corrosion inhibitor, 5-10 parts of rust inhibitor, and soft water.

2. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The mass ratio of the trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol, and alkyl diethanolamide is (0.3-0.7):(1.5-2):(0.3-0.5).

3. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The structure of the trisiloxane alkanolamide is as follows: ； R is selected from C6-C8 alkanolamide groups.

4. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The ethoxylated-propoxylated fatty alcohols include ethoxylated-propoxylated C10-12 alcohols.

5. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The alkyl diethanolamide is a C12-C16 alkyl diethanolamide.

6. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The organic amines include 2-aminoethanol and / or triethanolamine.

7. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The organic phosphoric acid includes octyl phosphate and / or aminotrimethylphosphoric acid.

8. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The corrosion inhibitor includes benzotriazole.

9. The environmentally friendly room-temperature cleaning agent according to claim 1, characterized in that, The rust inhibitor includes any one or a combination of at least two of isononanoic acid, sebacic acid, lauric acid, or C10-C12 diacids.

10. The method for preparing the environmentally friendly room-temperature cleaning agent according to any one of claims 1-9, characterized in that, The preparation method includes the following steps: Trisiloxane alkanolamide, ethoxylated-propoxylated fatty alcohol, and alkyl diethanolamide were mixed with soft water to obtain the environmentally friendly room temperature cleaning agent.

11. The preparation method according to claim 10, characterized in that, The mixing process also includes adding any one or a combination of at least two of the following: organic amines, organic phosphonic acids, corrosion inhibitors, or rust inhibitors.

12. The preparation method according to claim 10, characterized in that, The mixing temperature is 25-35℃, the stirring speed is 50-100 r / min, and the time is 0.5-1.5h.

13. The application of the environmentally friendly room temperature cleaning agent according to any one of claims 1-9 in cleaning metal parts.

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