Composite external insulation surface long-acting mildew-proof cleaning agent as well as preparation method and application thereof

Abstract

The invention discloses a composite external insulation surface long-acting mildew-proof cleaning agent and a preparation method and application thereof, and belongs to the technical field of composite external insulation cleaners.The composite external insulation surface long-acting mildew-proof cleaning agent is prepared from, by weight, 35-75 parts of organic solvent, 2-12 parts of mildew preventive, 2-6 parts of surfactant, 1-5 parts of coupling agent, pH regulator and deionized water, the pH of the pH regulator is regulated to be 7-9, and the pH regulator is regulated to be 7-9. The deionized water is supplemented until the total weight part of the cleaning agent is 100 parts; the preparation method comprises the following steps: adding an organic solvent, a mildew preventive, a surfactant and a coupling agent into a reaction kettle; adjusting the pH value to 7-9 by using a pH regulator; and adding deionized water, adjusting the total weight of the cleaning agent to a required amount, and stirring for the third time to obtain the final long-acting mildew-proof cleaning agent. According to the composite external insulation surface long-acting mildew-proof cleaning agent and the preparation method thereof provided by the invention, the cleaning agent has good removal and inhibition effects on mildew, has a long-acting mildew-proof function and does not damage a composite external insulation material.

Description

Technical Field

[0001] The present invention relates to a long - acting mildew - proof cleaning agent for the surface of composite external insulation, its preparation method and application, and belongs to the technical field of composite external insulation cleaning agents. Background Art

[0002] Composite external insulation materials, such as composite insulators, have been widely used in the power system due to their excellent hydrophobicity, pollution - flash - over resistance performance and light weight. However, during long - term operation, especially in an environment with high humidity, high temperature and poor ventilation, mildew is extremely likely to grow on the surface of composite external insulation.

[0003] The growth and reproduction of mildew on the surface of composite external insulation will bring many serious problems. The mycelium of mildew penetrates into the micropores and crevices of the material, increasing the surface roughness, damaging the surface flatness, and reducing the surface hydrophobic performance and hydrophobic migration property. This makes the composite external insulation more likely to absorb moisture, resulting in a decline in insulation performance, increasing the risk of pollution - flash - over and flash - over accidents, and seriously threatening the safe and stable operation of the power system.

[0004] At present, the cleaning agents for the surface of composite external insulation on the market mainly focus on removing dirt, and have poor effects on removing and inhibiting mildew. Although some cleaning agents can remove mildew in the short term, they cannot provide long - acting mildew - proof protection, and mildew is likely to grow again. Moreover, some cleaning agents may damage the composite external insulation material itself and affect its original performance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a long - acting mildew - proof cleaning agent for the surface of composite external insulation, its preparation method and application, which have good effects on removing and inhibiting mildew, have a long - acting mildew - proof function and do not damage the composite external insulation material.

[0006] To solve the above - mentioned technical problem, the technical solution adopted by the present invention is as follows:

[0007] In the first aspect, the present invention provides a long - acting mildew - proof cleaning agent for the surface of composite external insulation. By weight, it includes 35 - 75 parts of organic solvent, 2 - 12 parts of mildew - proof agent, 2 - 6 parts of surfactant, 1 - 5 parts of coupling agent, a pH regulator and deionized water, wherein the pH regulator adjusts the pH of the mixture of the organic solvent, mildew - proof agent, surfactant and coupling agent to 7 - 9, and the deionized water makes up to 100 parts by weight of the total weight of the cleaning agent.

[0008] The organic solvents include one or more of ethyl acetate, ethyl butyrate, and diethyl carbonate. The organic solvents can dissolve the oil stains and organic impurities on the surface of the composite outer insulation, create good conditions for other components to play their roles, and help the components to be evenly dispersed in the solution. These mildew-proof agents have broad-spectrum antibacterial activity, can effectively inhibit the growth and reproduction of various mildews, and prevent the invasion of the composite outer insulation surface by mildews from the root cause.

[0009] The mildew-proof agents include one or more of tetramethylthiuram disulfide, 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, and 2,2'-dithiobis(N-methylbenzamide). These mildew-proof agents have broad-spectrum antibacterial activity, can effectively inhibit the growth and reproduction of various mildews, and prevent the invasion of the composite outer insulation surface by mildews from the root cause.

[0010] The surfactants include one or more of sodium lauryl polyoxyethylene ether sulfate and alkyl glycosides. The surfactants can reduce the surface tension of the cleaning agent, enable the cleaning agent to better wet and spread on the surface of the composite outer insulation, improve the cleaning efficiency, and ensure that the cleaning agent can fully contact and act on all parts of the surface.

[0011] The coupling agents include one or more of γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, N-aminoethyl-γ-aminopropyltriethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane. The coupling agents can enhance the binding force between the components and between the cleaning agent and the surface of the composite outer insulation, improve the adhesion and stability of the cleaning agent, enable the cleaning agent to adhere firmly to the surface for a long time, and continuously play the roles of mildew prevention and protection.

[0012] The pH regulators include sodium hydroxide and hydrochloric acid. A suitable pH value can ensure the activity and stability of the components in the cleaning agent, and at the same time avoid corroding the composite outer insulation material and protect the performance of the material from being damaged. The solvent is used to dissolve and dilute other components to form a uniform and stable cleaning agent system, ensuring that the components can be fully mixed and play a synergistic role.

[0013] In the second aspect, the present invention provides a preparation method for a long-acting mildew-proof cleaning agent for the surface of a composite outer insulation, comprising the following steps:

[0014] Add the organic solvents, mildew-proof agents, surfactants, and coupling agents into a reaction kettle, and perform the first stirring at room temperature to obtain a mixed solution;

[0015] Use the pH regulator to adjust the pH value of the mixed solution to between 7 and 9, and perform the second stirring during the adjustment process to obtain a mixed solution after pH adjustment;

[0016] Deionized water is added to the mixed solution after pH adjustment to adjust the total weight of the cleaning agent to the required amount, and the third stirring is carried out to obtain the final long-acting mildew-proof cleaning agent.

[0017] The speeds of the first stirring and the second stirring are both 200 - 400 r / min, and the time for both is 10 - 20 min.

[0018] The time for the third stirring is 10 - 20 min.

[0019] Thirdly, the present invention provides the application of the long-acting mildew-proof cleaning agent for the composite outer insulation surface in the composite outer insulation.

[0020] Advantages of the present invention: A long-acting mildew-proof cleaning agent for the composite outer insulation surface, its preparation method and application provided by the present invention. The cleaning agent includes 35 - 75 parts of organic solvent, 2 - 12 parts of mildew-proof agent, 2 - 6 parts of surfactant, 1 - 5 parts of coupling agent, pH regulator and deionized water. In the formula, the organic solvent is used to dissolve oil stains and impurities, creating conditions for other components to play their roles. The mildew-proof agent can directly inhibit and kill molds; the surfactant reduces the surface tension and improves the cleaning effect, and the coupling agent enhances the binding force between components and between the cleaning agent and the composite outer insulation surface. Each component cooperates with each other to jointly achieve the functions of high-efficiency cleaning and long-acting mildew prevention; in addition, the weight fraction ranges of each raw material are strictly limited, and this precise ratio is the key to ensuring the performance of the cleaning agent. Different combinations of component ratios will affect the stability of the cleaning agent, the mildew-proof effect, the compatibility with materials, etc. Under the ratio of the present invention, the cleaning agent achieves the optimal mildew-proof effect; finally, the pH value of the cleaning agent is adjusted to between 7 and 9. This pH range can not only ensure the activity and stability of each component in the cleaning agent, but also avoid corrosion of the composite outer insulation material and ensure that the performance of the material is not damaged. In summary, through the above settings of raw materials, ratio and pH, the cleaning agent prepared by the present invention has good effects on removing and inhibiting molds, can form a long-lasting mildew-proof protective layer on the material surface, reduce the possibility of mold regrowth, has a long-acting mildew-proof function, and can maintain its good hydrophobic property and hydrophobic migration property, avoiding damage to the surface structure and molecular composition of the material. Detailed implementation manners

[0021] The present invention will be further described below. The following examples are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0022] Example 1

[0023] The present invention discloses a long - acting anti - mildew cleaning agent for the surface of composite external insulation. By weight, it includes 60 parts of organic solvent, 5 parts of anti - mildew agent, 3 parts of surfactant, 2 parts of coupling agent, pH regulator and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti - mildew agent, surfactant and coupling agent to 8, and deionized water is added to make up the total weight of the cleaning agent to 100 parts.

[0024] Among them, the organic solvent is ethyl acetate, the anti - mildew agent is tetramethylthiuram disulfide, the surfactant is sodium lauryl polyoxyethylene ether sulfate, and the coupling agent is γ - aminopropyltriethoxysilane (silane coupling agent KH - 550). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0025] The preparation method of the above - mentioned long - acting anti - mildew cleaning agent for the surface of composite external insulation includes the following steps:

[0026] Step 1: Add ethyl acetate, tetramethylthiuram disulfide, sodium lauryl polyoxyethylene ether sulfate and silane coupling agent KH - 550 into the reaction kettle, and stir at 300 r / min for 15 minutes at room temperature.

[0027] Step 2: Adjust the pH to 8 with sodium hydroxide and hydrochloric acid, and stir at 150 r / min for 15 minutes.

[0028] Step 3: Add the remaining deionized water, stir for 15 minutes and then discharge and package.

[0029] Example 2

[0030] The present invention discloses a long - acting anti - mildew cleaning agent for the surface of composite external insulation. By weight, it includes 70 parts of organic solvent, 6 parts of anti - mildew agent, 4 parts of surfactant, 3 parts of coupling agent, pH regulator and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti - mildew agent, surfactant and coupling agent to 7.5, and deionized water is added to make up the total weight of the cleaning agent to 100 parts.

[0031] Among them, the organic solvent is ethyl acetate, the anti - mildew agent is 2,2'-dithiobis(N - methylbenzamide), the surfactant is alkyl polyglycoside, and the coupling agent is γ - glycidoxypropyltrimethoxysilane (silane coupling agent KH - 560). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0032] The preparation method of the above - mentioned long - acting anti - mildew cleaning agent for the surface of composite external insulation includes the following steps:

[0033] Step 1: Add ethyl acetate, 2,2'-dithiobis(N - methylbenzamide), alkyl polyglycoside and silane coupling agent KH - 560 into the reaction kettle, and stir at 350 r / min for 18 minutes.

[0034] Step 2: Adjust the pH to 7.5 and stir at 120 r / min for 18 minutes.

[0035] Step 3: Add the remaining deionized water, stir for 18 minutes, and then discharge and package.

[0036] Example 3

[0037] The present invention discloses a long - acting anti - mildew cleaning agent for the surface of composite external insulation. By weight, it includes 70 parts of organic solvent, 3 parts of anti - mildew agent, 2 parts of surfactant, 1 part of coupling agent, pH regulator and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti - mildew agent, surfactant and coupling agent to 7, and the deionized water makes up to 100 parts by weight of the total cleaning agent.

[0038] Among them, the organic solvent includes 40 parts of ethyl acetate and 30 parts of diethyl carbonate, the anti - mildew agent is 4,5 - dichloro - 2 - n - octyl - 4 - isothiazolin - 3 - one (DCOIT), the surfactant is alkyl polyglycoside, and the coupling agent is γ - glycidoxypropyltrimethoxysilane (silane coupling agent KH - 560). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0039] The preparation method of the above - mentioned long - acting anti - mildew cleaning agent for the surface of composite external insulation includes the following steps:

[0040] Step 1: Add ethyl acetate, diethyl carbonate, DCOIT, alkyl polyglycoside, and silane coupling agent KH - 560 into the reaction kettle and stir at 200 r / min for 10 minutes.

[0041] Step 2: Use sodium hydroxide to adjust the pH to 7 and stir at 100 r / min for 10 minutes.

[0042] Step 3: Add the remaining deionized water, stir for 10 minutes, and then discharge.

[0043] Example 4

[0044] The present invention discloses a long - acting anti - mildew cleaning agent for the surface of composite external insulation. By weight, it includes 65 parts of organic solvent, 4 parts of anti - mildew agent, 2 parts of surfactant, 3 parts of coupling agent, pH regulator and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti - mildew agent, surfactant and coupling agent to 7.5, and the deionized water makes up to 100 parts by weight of the total cleaning agent.

[0045] Among them, the organic solvent includes 60 parts of ethyl acetate and 5 parts of ethylene carbonate, the anti - mildew agent is tetramethylthiuram disulfide, the surfactant is alkyl polyglycoside, and the coupling agent is γ - aminopropyltriethoxysilane (silane coupling agent KH - 550). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0046] The preparation method of the above-mentioned long-acting anti-mildew cleaning agent for the composite outer insulation surface includes the following steps:

[0047] Step 1: Add ethyl acetate, ethylene carbonate, tetramethylthiuram disulfide, 2,2'-dithiobis(N-methylbenzamide), sodium lauryl polyoxyethylene ether sulfate, and silane coupling agent KH-550 to the reaction kettle and stir at 250 r / min for 12 minutes.

[0048] Step 2: Adjust the pH to 7.5 with hydrochloric acid and stir at 120 r / min for 12 minutes.

[0049] Step 3: Add the remaining deionized water, stir for 12 minutes and then discharge.

[0050] Example 5

[0051] The present invention discloses a long-acting anti-mildew cleaning agent for the composite outer insulation surface, which, by weight, includes 70 parts of organic solvent, 5 parts of anti-mildew agent, 4 parts of surfactant, 3 parts of coupling agent, pH regulator and deionized water, wherein the pH regulator adjusts the pH of the mixture of organic solvent, anti-mildew agent, surfactant and coupling agent to 8, and the deionized water is added to make up the total weight of the cleaning agent to 100 parts.

[0052] Among them, the organic solvent includes one or more of 60 parts of ethyl acetate and 10 parts of diethyl carbonate, the anti-mildew agent is 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT), the surfactant is alkyl polyglycoside, and the coupling agent is N-aminoethyl-γ-aminopropyltriethoxysilane (silane coupling agent KH-792). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0053] The preparation method of the above-mentioned long-acting anti-mildew cleaning agent for the composite outer insulation surface includes the following steps:

[0054] Step 1: Add ethyl acetate, ethylene carbonate, DCOIT, alkyl polyglycoside, and silane coupling agent KH-792 to the reaction kettle and stir at 300 r / min for 15 minutes.

[0055] Step 2: Adjust the pH to 8 with sodium hydroxide and stir at 150 r / min for 15 minutes.

[0056] Step 3: Add the remaining deionized water, stir for 15 minutes and then discharge.

[0057] Example 6

[0058] The present invention discloses a long - acting anti - mildew cleaning agent for the surface of composite external insulation. By weight, it includes 70 parts of organic solvent, 3 parts of anti - mildew agent, 2 parts of surfactant, 5 parts of coupling agent, pH regulator and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti - mildew agent, surfactant and coupling agent to 8.5, and deionized water is added to make up to 100 parts by weight of the total cleaning agent.

[0059] Among them, the organic solvent is ethyl acetate, the anti - mildew agent is 4,5 - dichloro - 2 - n - octyl - 4 - isothiazolin - 3 - one (DCOIT), the surfactant is sodium lauryl polyoxyethylene ether sulfate, and the coupling agent is γ - aminopropyltriethoxysilane (KH - 550). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0060] The preparation method of the above - mentioned long - acting anti - mildew cleaning agent for the surface of composite external insulation includes the following steps:

[0061] Step 1: Add ethyl acetate, tetramethylthiuram disulfide, DCOIT, sodium lauryl polyoxyethylene ether sulfate, and silane coupling agent KH - 550 into the reaction kettle and stir at 350 r / min for 18 minutes.

[0062] Step 2: Adjust the pH to 8.5 with hydrochloric acid and stir at 180 r / min for 18 minutes.

[0063] Step 3: Add the remaining deionized water, stir for 18 minutes and then discharge.

[0064] Example 7

[0065] The present invention discloses a long - acting anti - mildew cleaning agent for the surface of composite external insulation. By weight, it includes 75 parts of organic solvent, 6 parts of anti - mildew agent, 3 parts of surfactant, 4 parts of coupling agent, pH regulator and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti - mildew agent, surfactant and coupling agent to 9, and deionized water is added to make up to 100 parts by weight of the total cleaning agent.

[0066] Among them, the organic solvent includes 55 parts of ethyl acetate and 20 parts of ethyl butyrate, the anti - mildew agent is 2,2'-dithiobis(N - methylbenzamide), the surfactant is one or more of alkyl polyglycosides, and the coupling agent is γ - glycidoxypropyltrimethoxysilane (silane coupling agent KH - 560). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0067] The preparation method of the above - mentioned long - acting anti - mildew cleaning agent for the surface of composite external insulation includes the following steps:

[0068] Step 1: Add ethyl acetate, ethyl butyrate, 2,2'-dithiobis(N-methylbenzamide), alkyl glycoside, and silane coupling agent KH-560 to the reaction kettle and stir at 400 r / min for 20 minutes.

[0069] Step 2: Adjust the pH to 9 with sodium hydroxide and stir at 200 r / min for 20 minutes.

[0070] Step 3: Add the remaining deionized water, stir for 20 minutes, and then discharge.

[0071] Example 8

[0072] The present invention discloses a long-acting anti-mildew cleaning agent for the surface of composite external insulation. By weight, it includes 55 parts of organic solvent, 4 parts of anti-mildew agent, 2 parts of surfactant, 3 parts of coupling agent, pH regulator, and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti-mildew agent, surfactant, and coupling agent to 7.2, and the deionized water is added to make up the total weight of the cleaning agent to 100 parts.

[0073] Among them, the organic solvent is ethyl acetate, the anti-mildew agent is 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT), the surfactant is sodium lauryl ether sulfate, and the coupling agent is N-(β-aminoethyl)-γ-aminopropyltriethoxysilane (silane coupling agent KH-791). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0074] The preparation method of the above-mentioned long-acting anti-mildew cleaning agent for the surface of composite external insulation includes the following steps:

[0075] Step 1: Add ethyl acetate, DCOIT, OIT, sodium lauryl ether sulfate, and silane coupling agent KH-791 to the reaction kettle and stir at 320 r / min for 16 minutes;

[0076] Step 2: Adjust the pH to 7.2 with hydrochloric acid and stir at 130 r / min for 13 minutes.

[0077] Step 3: Add the remaining deionized water, stir for 13 minutes, and then discharge.

[0078] Example 9

[0079] The present invention discloses a long-acting anti-mildew cleaning agent for the surface of composite external insulation. By weight, it includes 65 parts of organic solvent, 4 parts of anti-mildew agent, 6 parts of surfactant, 5 parts of coupling agent, pH regulator, and deionized water. The pH regulator adjusts the pH of the mixture of organic solvent, anti-mildew agent, surfactant, and coupling agent to 8.2, and the deionized water is added to make up the total weight of the cleaning agent to 100 parts.

[0080] Among them, the organic solvent includes ethyl acetate, the mildew preventive includes 2 parts of tetramethylthiuram disulfide and 2 parts of 2,2'-dithiobis(N-methylbenzamide), the surfactant is alkyl polyglycoside, and the coupling agent is γ-aminopropyltriethoxysilane (silane coupling agent KH-550). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0081] The preparation method of the above-mentioned long-acting mildew-proof cleaning agent for the composite outer insulation surface includes the following steps:

[0082] Step 1, add ethyl acetate, tetramethylthiuram disulfide, 2,2'-dithiobis(N-methylbenzamide), alkyl polyglycoside, and silane coupling agent KH-550 into the reaction kettle, and stir at 380 r / min for 19 minutes.

[0083] Step 2, adjust the pH to 8.2 with sodium hydroxide, and stir at 160 r / min for 16 minutes.

[0084] Step 3, add the remaining deionized water, stir for 16 minutes and discharge.

[0085] Example 10

[0086] The present invention discloses a long-acting mildew-proof cleaning agent for the composite outer insulation surface, which, by weight, includes 35 parts of an organic solvent, 2 parts of a mildew preventive, 4 parts of a surfactant, 2 parts of a coupling agent, a pH regulator, and deionized water, wherein the pH regulator adjusts the pH of the mixture of the organic solvent, the mildew preventive, the surfactant, and the coupling agent to 7.8, and the deionized water is made up to 100 parts by weight of the total weight of the cleaning agent.

[0087] Among them, the organic solvent is ethyl acetate, the mildew preventive is 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT), the surfactant is sodium lauryl polyoxyethylene ether sulfate, and the coupling agent is γ-glycidoxypropyltrimethoxysilane (silane coupling agent KH-560). The pH regulator includes sodium hydroxide and hydrochloric acid.

[0088] The preparation method of the above-mentioned long-acting mildew-proof cleaning agent for the composite outer insulation surface includes the following steps:

[0089] Step 1, add ethyl acetate, DCOIT, sodium lauryl polyoxyethylene ether sulfate, and silane coupling agent KH-560 into the reaction kettle, and stir at 360 r / min for 17 minutes.

[0090] Step 2, adjust the pH to 7.8 with hydrochloric acid, and stir at 140 r / min for 14 minutes.

[0091] Step 3, add the remaining deionized water, stir for 14 minutes and discharge.

[0092] Comparative Example 1

[0093] An ordinary composite outer insulation cleaning agent commonly available on the market is used, and there is no clear labeling of anti-mildew components.

[0094] Comparative Example 2

[0095] When preparing the cleaning agent, no coupling agent is added, and other components and preparation methods are the same as in Example 1.

[0096] Comparative Example 3

[0097] Formulation: Only 100 parts of ethyl acetate, no other components. Preparation method: Directly use ethyl acetate as the cleaning agent.

[0098] Comparative Example 4

[0099] Formulation: Contains 70 parts of ethyl acetate, 5 parts of fatty alcohol polyoxyethylene ether sodium sulfate, and deionized water is added up to 100 parts, without mildew inhibitor and coupling agent. Preparation method: Mix ethyl acetate and fatty alcohol polyoxyethylene ether sodium sulfate, and add deionized water and stir evenly.

[0100] Comparative Example 5

[0101] Formulation: Contains 90 parts of deionized water, 10 parts of fatty alcohol polyoxyethylene ether sodium sulfate, without organic solvents and mildew inhibitors, etc. Preparation method: Disperse fatty alcohol polyoxyethylene ether sodium sulfate in deionized water and ultrasonically disperse for 30 minutes.

[0102] The cleaning agents of Examples 1-10 and Comparative Examples 1-5 were respectively applied to the surfaces of composite insulators with the same specifications and similar degrees of mildew contamination, and the following performance tests were carried out:

[0103] Table 1 Performance Tests of Examples and Comparative Examples

[0104] Embodiments Mold removal rate Long-term mold test Hydrophobicity test (before test) Hydrophobicity test (after test) Example 1 Reaching over 95% Basically no mold growth in 6 months HC3 HC2 Example 2 Reaching over 95% Basically no mold growth in 6 months HC3 HC2 Example 3 93% Basically no mold growth in 5 months HC3 HC3 Example 4 94% Basically no mold growth in 5.5 months HC3 HC3 Example 5 95% Basically no mold growth in 6 months HC3 HC3 Example 6 96% Basically no mold growth in 6 months HC3 HC3 Example 7 97% Basically no mold growth in 6 months HC3 HC3 Example 8 95% Basically no mold growth in 5.5 months HC3 HC3 Example 9 98% Basically no mold growth in 6 months HC3 HC3 Example 10 96% Basically no mold growth in 6 months HC3 HC3 Comparative Example 1 45% Obvious and serious mold growth occurred after 1 month HC3 HC5 Comparative Example 2 40% Serious mold growth occurred after 1 month HC3 HC6 Comparative Example 3 65% Mold appeared after 2 months HC3 HC5 Comparative Example 4 70% Mold appeared after 3 months HC3 HC4 Comparative Example 5 55% Mold appeared after 1.5 months HC3 HC4

[0105] As shown in Table 1, when comparing Examples 1 to 5 with Comparative Example 1, it can be seen that the anti-mildew cleaning agent of the present invention has a significant improvement in the mildew removal rate. In addition, the results of the long-term mildew test show that the anti-mildew cleaning agent of the present invention has a long-term anti-mildew function. Finally, the results of the hydrophobicity test show that the anti-mildew cleaning agent of the present invention has good hydrophobicity ability.

[0106] As shown in Table 1, when comparing Examples 1 to 5 with Comparative Examples 2 to 5, it can be seen that the anti-mildew cleaning agent of the present invention has obvious improvements in the mildew removal rate, long-term anti-mildew function, and hydrophobicity ability compared with the cleaning agents lacking one or some components. This proves that the various components in the anti-mildew cleaning agent of the present invention play a synergistic function.

[0107] As can be seen from the above embodiments and performance tests, the long-acting anti-mildew cleaning agent of the present invention has significant advantages in terms of mildew removal, long-acting anti-mildew, and hydrophobic performance of the protective material, and can effectively solve the problems existing in the prior art. The cleaning agent of the present invention contains a variety of high-efficiency anti-mildew agents, which can quickly and thoroughly remove mildew on the surface of the composite external insulation, and form a durable anti-mildew protective layer on the surface, effectively inhibiting the regrowth of mildew. The anti-mildew effect is significant and lasting. In addition, while preventing mildew, it will not damage the performance of the composite external insulation material, can maintain its good hydrophobic performance and insulation performance, and extend the service life of the composite external insulation equipment. Finally, most of the raw materials selected are environmentally friendly materials, which are harmless to the human body and the environment, meet the environmental protection requirements, and can be safely applied to fields with high safety requirements such as the power system.

[0108] The cleaning agent of the present invention can be constructed by spraying, wiping and other methods, and the construction process is simple and convenient. Before construction, it is necessary to ensure that the surface of the composite external insulation is clean, dry, and free of obvious oil stains and impurities. During construction, the cleaning agent should be evenly applied or sprayed to ensure full coverage of the surface. After construction, the drying time of the cleaning agent is short, and the equipment can be put into use as soon as possible.

[0109] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A long-term anti-mildew cleaning agent for composite external insulation surface, characterized in that: The cleaning agent comprises 35 to 75 parts of an organic solvent, 2 to 12 parts of a mildew preventer, 2 to 6 parts of a surfactant, 1 to 5 parts of a coupling agent, a pH regulator and deionized water, wherein the pH regulator is used to adjust the pH of the mixed solution of the organic solvent, mildew preventer, surfactant and coupling agent to 7 to 9, and the deionized water is added to 100 parts by weight of the total cleaning agent.

2. The long-term anti-mildew cleaning agent for composite external insulation surface according to claim 1, characterized in that: The organic solvent includes one or more of ethyl acetate, ethyl butyrate and diethyl carbonate.

3. The long-term anti-mildew cleaning agent for composite external insulation surface according to claim 1, characterized in that: The mildew preventer comprises one or more of tetramethylthiuram disulfide, 4,5-dichloro-2-n-octyl-4-isothiazoline-3-one and 2,2'-dithiobis(N-methylbenzamide).

4. The long-term anti-mildew cleaning agent for composite external insulation surface according to claim 1, characterized in that: The surfactant includes one or more of sodium fatty alcohol polyoxyethylene ether sulfate and alkyl glycoside.

5. The long-term anti-mildew cleaning agent for composite external insulation surface according to claim 1, characterized in that: The coupling agent includes one or more of γ-aminopropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, N-aminoethyl-γ-aminopropyltriethoxysilane and N-(β-aminoethyl)-γ-aminopropyltriethoxysilane.

6. The long-term anti-mildew cleaning agent for composite external insulation surface according to claim 1, characterized in that: The pH adjuster includes sodium hydroxide and hydrochloric acid.

7. A method for preparing the long-lasting mildew-proof cleaning agent for composite external insulation surface according to any one of claims 1 to 6, characterized in that: The following steps are involved: Adding an organic solvent, a mildew preventive, a surfactant and a coupling agent into a reaction kettle, and performing a first stirring at room temperature to obtain a mixed solution; The pH value of the mixed solution is adjusted to between 7 and 9 using a pH adjuster, and a second stirring is performed during the adjustment process to obtain a pH-adjusted mixed solution; Deionized water was added to the mixed solution after pH adjustment to adjust the total weight of the cleaning agent to the required amount, and stirring was performed for the third time to obtain the final long-acting mildew-proof cleaning agent.

8. The method for preparing the long-acting mildew-proof cleaning agent for composite external insulation surface according to claim 7, characterized in that: The speed of the first stirring and the second stirring are both 200-400r / min, and the time is both 10-20min.

9. The method for preparing the long-acting mildew-proof cleaning agent for composite external insulation surface according to claim 7, characterized in that: The third stirring time is 10~20min.

10. Use of the long-acting anti-mildew cleaning agent for composite external insulation surface according to any one of claims 1 to 6 in composite external insulation.