Disinfectant with long-acting disinfection effect and preparation method thereof

Abstract

The invention discloses a disinfectant with a long-acting disinfection effect and a preparation method thereof, and belongs to the technical field of disinfection materials, the disinfectant is prepared from the following raw materials by weight: 0.2%-0.5% of a bactericide, 1%-5% of a waterproof agent, 0.1%-1% of a synergist, 0.5%-2% of a corrosion inhibitor, 1%-5% of a penetrant, and the balance purified water. The weight ratio of the waterproof agent to the penetrating agent is (0.9-1.1): 2. According to the disinfectant with the long-acting disinfection effect and the preparation method of the disinfectant, through the synergistic effect of all the components, the disinfectant can continuously disinfect for more than 24 hours, the killing logarithm value is larger than or equal to 3.00 after 24 hours, the sterilization effect can still be met by only conducting common cleaning within the long-acting disinfection time of the disinfectant, and the disinfectant has the long-acting disinfection effect. The problem that a traditional disinfectant can only resist bacteria for a long time and cannot achieve a long-acting disinfection effect is solved.

Description

Technical Field

[0001] This invention relates to a disinfectant with long-lasting disinfection effect and its preparation method, belonging to the field of disinfection materials technology. Background Technology

[0002] Long-lasting antibacterial effect refers to the ability of disinfectant products with antibacterial properties to kill or inhibit bacterial growth and reproduction for more than 7 days after application to the surface of an object. The evaluation index is a bactericidal rate of >90% after a specified test period. Currently, there are many studies on the long-lasting antibacterial effect of traditional disinfectants. For example, the study by Zeng Qili et al. in "Study on the bactericidal effect of quaternary ammonium salt disinfectants and their bactericidal persistence on object surfaces. Chinese Journal of Disinfection 35.11(2018):4." showed that benzalkonium bromide disinfectant maintained a bactericidal rate of 87% after 24 hours of continuous action; the bactericidal rate of compound quaternary ammonium salts decreased to 89% after 12 days.

[0003] Long-lasting disinfection refers to the disinfectant's ability to continuously kill microorganisms on surfaces over a prolonged period. Long-lasting antibacterial properties are not the same as continuous disinfection; their evaluation methods and indicators differ. Long-lasting disinfection requires a higher level of microbial killing ability from the disinfectant. While traditional disinfectants possess long-lasting antibacterial properties, they often fail to meet the stringent requirements of long-lasting disinfection, posing significant safety hazards in many scenarios with high disinfection requirements, such as hospitals, food processing workshops, and public places. To maintain the sterilization effect on surfaces and the environment, the frequency of daily disinfection needs to be increased. However, chemical disinfectants themselves have certain toxic side effects, and frequent disinfection increases environmental harm and poses health risks to humans. Therefore, developing a disinfectant capable of achieving long-lasting disinfection is of significant practical importance.

[0004] Currently, some studies have proposed using a kill log value ≥3.00 after 24 hours of disinfectant action as an evaluation index for long-lasting disinfection. However, the industry still generally uses the sterilization rate as an evaluation index in the evaluation methods for long-lasting disinfection of disinfectants. Moreover, current research on the long-lasting disinfection of disinfectants rarely involves the ability of disinfectants to resist wiping and washing. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a disinfectant with long-lasting disinfection effect and its preparation method. The components work synergistically to prevent the loss of effective ingredients in the disinfectant, resulting in a strong bactericidal effect. The disinfectant can penetrate into the surface and pores of objects to further enhance the bactericidal effect, maintain the effectiveness of the disinfectant for a longer period of time, and has low corrosiveness to equipment or materials in the usage scenario.

[0006] The present invention achieves the above objectives by adopting the following technical solutions:

[0007] On one hand, the present invention provides a disinfectant with long-lasting disinfection effect, which is made from the following raw materials in weight percentage: 0.2%-0.5% bactericide, 1%-5% waterproofing agent, 0.1%-1% synergist, 0.5%-2% corrosion inhibitor, 1%-5% penetrant, and purified water to make up 100%; wherein the weight ratio of the waterproofing agent to the penetrant is (0.9-1.1):2;

[0008] The bactericide includes double-chain quaternary ammonium salts and polyquaternary ammonium salts;

[0009] The waterproofing agent is composed of one or two of sodium methylsilicate and potassium methylsilicate and polymethyltriethoxysilane, wherein the weight ratio of the sum of the weights of sodium methylsilicate and potassium methylsilicate to the weight of polymethyltriethoxysilane is 1:(2-4).

[0010] The synergist is composed of N-oleodipropylenetriamine and oteninidine;

[0011] The corrosion inhibitor is composed of corrosion inhibitor A and corrosion inhibitor B. Corrosion inhibitor A is composed of triethanolamine borate and triethanolamine phosphate, and corrosion inhibitor B is composed of heptadecanylamine ethyl imidazoline quaternary ammonium salt and benzotriazole.

[0012] The penetrant is any one or two of fatty alcohol polyoxyethylene polyoxypropylene ether and hydrophobically modified acrylic polymer.

[0013] Preferably, the weight ratio of the double-chain quaternary ammonium salt to the polyquaternary ammonium salt in the bactericide is (5-7):1.

[0014] Preferably, the bactericide further includes organosilicon quaternary ammonium salts.

[0015] Preferably, the double-chain quaternary ammonium salt is any one or two of didecyldimethylammonium chloride and octyldecyldimethylammonium chloride;

[0016] The polyquaternium salt is any one or more of polyquaternium salt-7, polyquaternium salt-16, and polyquaternium salt-22;

[0017] The organosilicon quaternary ammonium salt is any one or two of trimethoxysilylpropyldimethyloctadecylammonium chloride and dioctadecyldimethylsilylpropylammonium chloride.

[0018] Preferably, the weight ratio of N-oleodipropylenetriamine and oteninidine in the synergist is (1-2):1.

[0019] Preferably, the weight ratio of corrosion inhibitor A to corrosion inhibitor B is (3-10):1, the weight ratio of triethanolamine borate to triethanolamine phosphate in corrosion inhibitor A is 1:(0.8-1.2), and the weight ratio of heptadecanylamine ethylimidazoline quaternary ammonium salt to benzotriazole in corrosion inhibitor B is (0.2-0.5):1.

[0020] Preferably, the weight ratio of fatty alcohol polyoxyethylene polyoxypropylene ether and hydrophobically modified acrylic polymer in the penetrant is (0.8-1.1):1.

[0021] Preferably, in fatty alcohol polyoxyethylene polyoxypropylene ether, the monomer unit ratio of polyoxyethylene EO to polyoxypropylene PO is 4:1.

[0022] On the other hand, the present invention provides a method for preparing the disinfectant with long-lasting disinfection effect, comprising the following steps: stirring and mixing the bactericide and waterproofing agent at room temperature for 2-3 hours, then adding a portion of purified water, and while stirring, adding the synergist, corrosion inhibitor and penetrant in sequence and stirring until evenly mixed, and finally adding the remaining purified water and stirring to fully dissolve and mix all the raw materials, thereby obtaining the disinfectant with long-lasting disinfection effect.

[0023] The beneficial effects of this application include, but are not limited to:

[0024] The disinfectant provided by this invention has a long-lasting disinfection effect. Even if the sample is cleaned normally during the test period, it can still meet the sterilization effect and meet the requirement of a kill value of ≥3.00 after 24 hours. It solves the problem that traditional disinfectants can only have long-lasting antibacterial effect but cannot achieve long-lasting disinfection effect. For use scenarios such as hospitals, food processing workshops, and public places, maintaining a disinfection frequency of once a day is sufficient to meet the requirements.

[0025] Specifically, the disinfectant with long-lasting disinfection effect provided by this invention, through the combination of various bactericides, can not only release bactericides at high concentrations in the early stage for rapid sterilization, but also prolong the sterilization effect through the adsorption-slow release balance of the bactericides; the film-forming properties of the organosilicon quaternary ammonium salt and waterproofing agent fill the adsorption gaps of the double-chain quaternary ammonium salt and polyquaternary ammonium salt, forming a dense bactericidal layer, making the disinfectant resistant to washing and wiping, and effectively resisting the dissolution and erosion of quaternary ammonium salts by water.

[0026] Among them, double-chain quaternary ammonium salts contain quaternary ammonium groups and two long alkyl chains, exhibiting strong hydrophobicity and membrane permeability. The two long alkyl chains can insert into the phospholipid layer of microbial cell membranes, while the cationic quaternary ammonium groups bind to the negatively charged surface of microorganisms, disrupting membrane integrity and leading to leakage of intracellular substances. The double-chain structure also enhances the adsorption of quaternary ammonium salts on surfaces, making them less susceptible to water erosion and maintaining a sustained bactericidal concentration.

[0027] Polyquaternary ammonium salts are highly cationic and can be physically adsorbed onto surfaces to form a bactericidal coating. Their high molecular weight makes them difficult for microorganisms to metabolize or hydrolyze, allowing for the slow release of active ingredients. In particular, the high molecular chains of polyquaternary ammonium salts can provide multi-point adsorption, enhancing the capture efficiency of microorganisms.

[0028] Organosilicon quaternary ammonium salts have strong film-forming ability. The hydrophobicity of the siloxane chains they contain can prevent water penetration and protect the quaternary ammonium groups from loss. Moreover, after the siloxane chains are hydrolyzed, they generate silanol groups -Si-OH, which form Si-O-Si chemical bonds with the surfaces of glass, metal oxides and other materials, allowing the quaternary ammonium groups to firmly adhere to the surface and kill microorganisms.

[0029] On the other hand, the methylsiloxane-Si-O-CH3 or similar siloxane skeleton contained in the waterproofing agent, after hydrolysis, generates silanol-Si-OH, which further condenses to form a three-dimensional hydrophobic siloxane structure, forming a chemically bonded hydrophobic layer on the surface, effectively blocking water penetration. While the double-chain quaternary ammonium salt sterilizes, the siloxane hydrophobic film can hinder the attachment and growth of microorganisms, forming a dual antibacterial barrier. Moreover, the siloxane film formed by the waterproofing agent encapsulates the quaternary ammonium salt, synergistically enhancing surface hydrophobicity with the hydrophobic chains of the quaternary ammonium salt, reducing the loss of disinfectant by water rinsing, while allowing the quaternary ammonium salt to be released slowly, prolonging the sterilization time. At the same time, the anions formed after silicate hydrolysis combine with the cationic groups of the quaternary ammonium salt through electrostatic attraction to form a complex, enhancing the adsorption stability of the quaternary ammonium salt on the surface. In addition, the siloxane groups of the waterproofing agent can also chemically bond with the siloxane chains of the organosilicon quaternary ammonium salt to form Si-O-Si, further improving the film density.

[0030] On the other hand, N-oleodipropylene triamine in the synergist opens channels by disrupting the lipid layer of the cell membrane, allowing oltinidine and the bactericide to rapidly enter the cell and bind to nucleic acids and enzymes in the cytoplasm, leading to cell metabolic disorders and death. This can significantly shorten the sterilization time and improve the inactivation efficiency. Moreover, the oil-based structure of N-oleodipropylene triamine can also form a hydrophobic layer on the surface of the object, prolonging the antibacterial activity.

[0031] On the other hand, the penetrant used in this invention can reduce surface tension, promote the penetration of quaternary ammonium salt and waterproofing agent into the porous surface, avoid surface erosion and loss, and avoid interfering with the film formation of siloxane; moreover, the penetrant used will not neutralize the charge with the cationic quaternary ammonium salt, thus avoiding precipitation.

[0032] Finally, the corrosion inhibitor used in this invention can synergistically enhance the effect of quaternary ammonium salts, and is suitable for various metal materials and pH environments, demonstrating strong versatility. While the hydrophobic film formed by the waterproofing agent reduces the contact between the surface and water, thus lowering the risk of corrosion, the corrosion inhibitor further protects the surface. Attached Figure Description

[0033] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0034] Figure 1Photographs showing stainless steel, carbon steel, copper, and aluminum samples placed in the long-lasting disinfectant provided by this invention for metal corrosion evaluation tests;

[0035] Figure 2 These are photographs of the metal corrosion test results for stainless steel, carbon steel, copper, and aluminum samples. Detailed Implementation

[0036] The present invention will be further described in detail below. However, it should be noted that the following specific embodiments are merely exemplary examples of the invention, and the scope of protection of the invention is not limited thereto. The scope of protection of the invention is defined only by the claims. It will be apparent to those skilled in the art that various other modifications and substitutions can be made to the embodiments of the invention within the scope of protection defined by the claims, and the same technical effects can still be achieved, thus achieving the ultimate technical objective of the invention.

[0037] In this invention, all ratios are by weight, and all percentages are by weight percentages. All numerical ranges described in this invention include endpoints and may include new numerical ranges obtained by arbitrarily combining the upper and lower limits of the disclosed ranges.

[0038] Unless otherwise specified, all raw materials in this manual were obtained through commercial channels.

[0039] Table 1

[0040]

[0041]

[0042] I. Disinfectants and their preparation methods provided in each embodiment and comparative example.

[0043] Example 1:

[0044] The disinfectant with long-lasting disinfection effect provided in this embodiment is made from the raw materials listed in Table 2:

[0045] Table 2

[0046]

[0047] The preparation method of the disinfectant with long-lasting disinfection effect provided in this embodiment is as follows:

[0048] At room temperature, the bactericide and waterproofing agent are stirred and mixed for 2-3 hours at a stirring speed of 400-500 rpm. Then, 20% purified water is added, and while stirring, the synergist, corrosion inhibitor, and penetrant are added in sequence and stirred until evenly mixed. Finally, the remaining purified water is added and stirred until all raw materials are fully dissolved and mixed to obtain the disinfectant with long-lasting disinfection effect.

[0049] Example 2:

[0050] The disinfectant with long-lasting disinfection effect provided in this embodiment is made from the raw materials listed in Table 3:

[0051] Table 3

[0052]

[0053] The preparation method of the disinfectant with long-lasting disinfection effect provided in this embodiment is the same as that in Embodiment 1.

[0054] Example 3:

[0055] The disinfectant with long-lasting disinfection effect provided in this embodiment is made from the raw materials listed in Table 4:

[0056] Table 4

[0057]

[0058]

[0059] The preparation method of the disinfectant with long-lasting disinfection effect provided in this embodiment is the same as that in Embodiment 1.

[0060] Example 4:

[0061] The disinfectant with long-lasting disinfection effect provided in this embodiment is made from the raw materials listed in Table 5:

[0062] Table 5

[0063]

[0064] The preparation method of the disinfectant with long-lasting disinfection effect provided in this embodiment is the same as that in Embodiment 1.

[0065] Testing revealed that the long-lasting disinfectant prepared according to the embodiments of the present invention has a pH of 8-9.

[0066] Among the corrosion inhibitors used in the above embodiments, triethanolamine borate is suitable for neutral and weakly alkaline environments and has excellent corrosion inhibition effects on carbon steel. Triethanolamine phosphate has both pH buffering and metal passivation effects, and can synergistically enhance the bactericidal effect with quaternary ammonium salts. The phosphate group can enhance the permeability of quaternary ammonium salts to bacterial cell membranes. Heptadecanylamine ethyl imidazoline quaternary ammonium salt has dual adsorption and chelation effects. The long-chain alkenyl group is directionally adsorbed onto the metal surface through van der Waals forces. The N atom of the imidazoline ring is coordinated with the empty Fe orbital, and the double bond in the molecule can undergo oxidative cross-linking to form a repair layer at the scratches on the surface. Benzotriazole has excellent corrosion inhibition effects on copper. The combination of these three corrosion inhibitors covers a variety of metal materials (iron, copper) and pH environments, improving the versatility of the disinfectant.

[0067] N-Oledipropylenetriamine is a cationic surfactant. Its long-chain oil group (C18 unsaturated hydrocarbon group) can disrupt the lipid layer of microbial cell membranes, enhance cell membrane permeability, and help other bactericidal components such as quaternary ammonium salts to quickly penetrate into the cell, thereby improving the bactericidal effect on deep-layer microorganisms. Simultaneously, the oil group structure of N-Oledipropylenetriamine can also form a hydrophobic layer on the surface, prolonging its antibacterial activity. Otinididine has dual-target attack characteristics; after adsorbing onto the surface of microorganisms, it penetrates the cell membrane and binds to nucleic acids and enzymes in the cytoplasm, leading to metabolic disorders and cell death.

[0068] Comparative Example 1:

[0069] The difference between this comparative example and Example 1 is that the bactericide is replaced with benzalkonium chloride, and the dosage is 0.25 kg.

[0070] Comparative Example 2:

[0071] The difference between this comparative example and Example 1 is that the bactericide is replaced with benzyltrimethylammonium chloride, and the dosage is 0.25 kg.

[0072] Comparative Example 3:

[0073] The disinfectant with long-lasting disinfection effect provided in this comparative example is made from the raw materials listed in Table 6:

[0074] Table 6

[0075]

[0076]

[0077] Comparative Example 4:

[0078] The disinfectant with long-lasting disinfection effect provided in this comparative example is made from the raw materials listed in Table 7:

[0079] Table 7

[0080]

[0081] Comparative Example 5:

[0082] The disinfectant with long-lasting disinfection effect provided in this comparative example is made from the raw materials listed in Table 8:

[0083] Table 8

[0084]

[0085] Comparative Example 6:

[0086] The difference between this comparative example and Example 1 is that the penetrant is replaced with sodium dodecylbenzenesulfonate.

[0087] Comparative Example 7:

[0088] The difference between this comparative example and Example 1 is that all raw materials are added to a container and stirred together to make a disinfectant.

[0089] Comparative Example 8:

[0090] A commercially available brand of compound double-chain quaternary ammonium salt disinfectant has an effective quaternary ammonium salt content (calculated as benzalkonium chloride) of 1.8g / L-2.0g / L.

[0091] Comparative Example 9: The difference between this comparative example and Example 2 is that the synergist used is only oxytinididine, and the dosage is 1 kg.

[0092] II. Methods and results for testing the effectiveness of disinfectants provided in each embodiment and comparative example.

[0093] 2.1 Test Materials:

[0094] The disinfectants provided in each embodiment and comparative example;

[0095] Test indicator bacteria: Staphylococcus aureus, ATCC 6538; Escherichia coli 8099;

[0096] Experimental method: The log kill value = the log of the average viable bacteria concentration of the control group - the log of the average viable bacteria concentration of the experimental group. If the log kill value of the experimental group is ≥3.00 after 24 hours, the disinfectant is judged to have a 24-hour long-term disinfection effect. The specific method adopts the materials and experimental methods disclosed in "Zhang Qi, Li Tao, Wang Yanyan, Zhang Liubo. (2024). Experimental study on the evaluation of the long-term disinfection effect of polyhexamethylene biguanide hydrochloride disinfectant. Chinese Journal of Disinfection, 41(4), 256-258." The contamination carrier, test reagents, centrifuge tubes, wiping cloths and other materials and experimental methods are as follows.

[0097] Disinfectants prepared according to the various examples and comparative examples were dropped onto the contaminated steel sheets and allowed to air dry naturally for 24 hours. After wiping cycles and re-inoculation experiments, the residual components of the disinfectants provided in each example and comparative example were measured. The bactericidal effect on the test bacteria contaminated on the steel sheets was shown in Table 9 after an action time of 10 minutes. Furthermore, this invention also tested the rate of decrease in effective components of the disinfectant after being placed at 37°C for 90 days.

[0098] Table 9

[0099]

[0100] The comparison shows that when benzalkonium chloride and benzyltrimethylammonium chloride were used as bactericides in Comparative Examples 1 and 2, the long-term disinfection performance of the disinfectants was significantly reduced. The reasons may be: (1) Benzyltrimethylammonium chloride lacks strong hydrophobic adsorption capacity due to its double-chain or high molecular structure, making it easy to be washed away by water and difficult to be effectively encapsulated by the siloxane membrane; (2) Benzyltrimethylammonium chloride cannot form chemical bonds with siloxane groups and relies only on physical adsorption, resulting in discontinuous film formation and weakened waterproof effect; (3) Benzyltrimethylammonium chloride has a low charge density, weak ability to destroy bacterial membranes, and lacks a slow-release mechanism, making it difficult to maintain a bactericidal effect for more than 24 hours.

[0101] In Comparative Example 3, no waterproofing agent was added, which could not prevent the effective ingredients in the disinfectant from being washed away or diluted by water. The sample failed to meet the kill log value after 24 hours of action and could not meet the requirements for long-term disinfection.

[0102] In Comparative Example 4, the use of conventional waterproofing agents also failed to meet the requirements for long-lasting disinfection.

[0103] In Comparative Example 5, the amount of waterproofing agent added was greater than that of penetrant, which affected the bactericidal effect.

[0104] In Comparative Example 6, sodium dodecylbenzenesulfonate was used as a penetrant, but due to its reaction with quaternary ammonium salts, a disinfectant with uniform properties could not be obtained.

[0105] In Comparative Example 7, the ingredients were mixed together, but the effect of the disinfectant being fully coated by the waterproofing agent was not achieved, which made the disinfectant easy to be washed away and reduced its disinfection effect.

[0106] Comparative Example 9 used only oxytinidin as a synergist, and oxytinidin does not contain an oil-based structure, which affects the bactericidal effect.

[0107] Furthermore, according to section 2.2.4 of the "Disinfection Technical Specifications" (2002 edition), if... Figure 1 The long-acting disinfectant provided by this invention was tested for its metal corrosion resistance. The effects on stainless steel, carbon steel, copper, and aluminum were tested respectively. Figure 2The results show that the long-lasting disinfectant provided by this invention has virtually no corrosion to stainless steel, carbon steel, copper, and aluminum, and exhibits excellent corrosion resistance.

[0108] In summary, based on the disinfectant results obtained from the various embodiments and comparative examples, the disinfectant provided by this invention exhibits a kill log value ≥3.00 after 24 hours, providing continuous disinfection for more than 24 hours. Furthermore, the effective component of the disinfectant shows a low decrease rate after being placed at 37°C for 90 days. In contrast, the disinfectants provided in the comparative examples show a significant decrease in kill efficacy after 24 hours, failing to meet the requirements for long-term disinfection.

[0109] The above specific embodiments should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, any alternative improvements or modifications made to the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0110] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A disinfectant with long-lasting disinfection effect, characterized in that, It is made from the following raw materials in weight percentages: bactericide 0.2%-0.5%, waterproofing agent 1%-5%, synergist 0.1%-1%, corrosion inhibitor 0.5%-2%, penetrant 1%-5%, and purified water to make up 100%; the weight ratio of the waterproofing agent to the penetrant is (0.9-1.1):2; The bactericide includes double-chain quaternary ammonium salts and polyquaternary ammonium salts; The waterproofing agent is composed of one or two of sodium methylsilicate and potassium methylsilicate and polymethyltriethoxysilane, wherein the weight ratio of the sum of the weights of sodium methylsilicate and potassium methylsilicate to the weight of polymethyltriethoxysilane is 1:(2-4). The synergist is composed of N-oleodipropylenetriamine and oteninidine; The corrosion inhibitor is composed of corrosion inhibitor A and corrosion inhibitor B. Corrosion inhibitor A is composed of triethanolamine borate and triethanolamine phosphate, and corrosion inhibitor B is composed of heptadecanylamine ethyl imidazoline quaternary ammonium salt and benzotriazole. The penetrant is any one or two of fatty alcohol polyoxyethylene polyoxypropylene ether and hydrophobically modified acrylic polymer.

2. The disinfectant with long-lasting disinfection effect according to claim 1, characterized in that, The weight ratio of double-chain quaternary ammonium salt to polyquaternary ammonium salt in the bactericide is (5-7):

1.

3. The disinfectant with long-lasting disinfection effect according to claim 1, characterized in that, The bactericide also includes organosilicon quaternary ammonium salts.

4. The disinfectant with long-lasting disinfection effect according to claim 3, characterized in that, The double-chain quaternary ammonium salt is any one or two of didecyldimethylammonium chloride and octyldecyldimethylammonium chloride; The polyquaternium salt is any one or more of polyquaternium salt-7, polyquaternium salt-16, and polyquaternium salt-22; The organosilicon quaternary ammonium salt is any one or two of trimethoxysilylpropyldimethyloctadecylammonium chloride and dioctadecyldimethylsilylpropylammonium chloride.

5. The disinfectant with long-lasting disinfection effect according to claim 1, characterized in that, The weight ratio of N-oleodipropylenetriamine to oxytinidin in the synergist is (1-2):

1.

6. The disinfectant with long-lasting disinfection effect according to claim 1, characterized in that, The weight ratio of corrosion inhibitor A to corrosion inhibitor B is (3-10):1, the weight ratio of triethanolamine borate to triethanolamine phosphate in corrosion inhibitor A is 1:(0.8-1.2), and the weight ratio of heptadecanylamine ethyl imidazoline quaternary ammonium salt to benzotriazole in corrosion inhibitor B is (0.2-0.5):

1.

7. The disinfectant with long-lasting disinfection effect according to claim 1, characterized in that, The weight ratio of fatty alcohol polyoxyethylene polyoxypropylene ether and hydrophobically modified acrylic polymer in the penetrant is (0.8-1.1):

1.

8. The disinfectant with long-lasting disinfection effect according to claim 1, characterized in that, In fatty alcohol polyoxyethylene polyoxypropylene ether, the monomer unit ratio of polyoxyethylene EO to polyoxypropylene PO is 4:

1.

9. A method for preparing a disinfectant with long-lasting disinfection effect as described in any one of claims 1-8, characterized in that, The process includes the following steps: Stir the bactericide and waterproofing agent at room temperature for 2-3 hours, then add a portion of purified water, and while stirring, add the synergist, corrosion inhibitor, and penetrant in sequence, stirring until evenly mixed. Finally, add the remaining purified water and stir to fully dissolve and mix all the raw materials to obtain the disinfectant with long-lasting disinfection effect.

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