Long-acting antibacterial floor cleaning agent and preparation method thereof

Abstract

The invention relates to the field of daily chemical industry, in particular to a long-acting antibacterial floor cleaning agent and a preparation method thereof.The long-acting antibacterial floor cleaning agent is prepared from, by mass, 10%-20% of a natural nonionic surfactant, 1%-10% of a Chinese herbal medicine bacteriostatic agent, 0.1%-15% of a chelating agent, 0.1%-10% of auxiliaries and the balance water; the bacteriostatic agent is a wormwood extract, a dandelion extract and a purslane extract, has no irritant peculiar smell, is environment-friendly and nontoxic to human and animals, and especially has remarkable bactericidal performance when the weight ratio of the wormwood extract to the dandelion extract to the purslane extract is 1: 1: 1.5; the natural nonionic surfactant is tea saponin and anacardol block polyether, the anacardol block polyether not only has the characteristic of low foam, but also has an emulsifying effect, after the anacardol block polyether is compounded with the nonionic surfactant, the Chinese herbal medicine bacteriostatic agent, the auxiliaries and other components, a synergistic effect can be generated, the bacteriostatic performance of the product can be improved, and the antibacterial property of the product can be improved. Meanwhile, the stability of the whole system is further enhanced, and adverse phenomena such as flocculation are avoided, so that the decontamination effect of the cleaning agent is ensured.

Description

Technical Field

[0001] The present invention relates to the field of daily chemical industry, and specifically to a long-acting antibacterial floor cleaner and a preparation method thereof. Background Art

[0002] With the improvement of living standards, people's requirements for the comfort of the home environment are also getting higher and higher. Especially for families with children who like to run around barefoot, and even younger babies like to crawl on the ground. Therefore, the cleaning intensity of the home floor environment needs to be greatly enhanced. Simple mopping with clean water cannot meet the requirements of sterilization and antibacterial, and it is impossible to achieve the freedom of walking barefoot. Therefore, a floor cleaner that can strongly remove dirt and bacteria, is natural, non-toxic, has a natural smell, does not produce a large amount of foam and does not require multiple rinses is needed, while also bringing a pleasant and safe user experience.

[0003] Chinese Patent CN109294750A discloses an antibacterial cleaning nano-water and a preparation method thereof, but its antibacterial effect is poor, and it cannot ensure long-acting antibacterial effect under the cleaning effect. Chinese Patent CN108192766A discloses a floor cleaner, which has a pleasant smell and good grease removal effect. However, it has a certain pollution to the environment and does not conform to the current theme of green environmental protection. Therefore, it is necessary to develop an environmentally friendly floor cleaner with long-acting antibacterial effect that is non-toxic to humans and animals. Summary of the Invention

[0004] In view of the deficiencies of the existing technology, the present invention provides a long-acting antibacterial floor cleaner and a preparation method thereof. The machine-washable floor cleaner contains natural non-ionic surfactants, as well as Chinese herbal medicine antibacterial agents, chelating agents and auxiliaries, which are environmentally friendly, non-toxic to humans and animals and can have long-acting antibacterial effect, solving the problems of large amount of foam and inability to have long-acting antibacterial effect in current floor cleaners.

[0005] To achieve the above object, the specific technical solutions of the present invention are as follows: The present invention provides a long-acting antibacterial floor cleaner, which includes the following components by mass percentage: 10% - 20% of natural non-ionic surfactant, 1% - 10% of Chinese herbal medicine antibacterial agent, 0.1% - 15% of chelating agent, 0.1% - 10% of auxiliary, and the balance is water.

[0006] Further, the natural non-ionic surfactants are tea saponin and cashew phenol polyethers, and the weight ratio of the two is 1:0.5 - 1.5.

[0007] Tea saponin, also known as tea saponin, is a type of glycoside compound extracted from tea seeds and tea oil seeds. It contains a hydrophilic group with an oxygen-containing group, mainly in the sugar ligand and ester ligand of saponin, and esters all have the characteristic of low foam. Therefore, tea saponin itself is a surfactant with low foaming property. In addition, tea saponin not only has pharmacological effects such as anti-permeation, anti-inflammatory, and analgesic effects, but also has the functions of sterilizing and killing insects and stimulating the growth of certain plants.

[0008] Cardanol is refined from natural cashew nut shell oil, containing a large amount of active single-component phenols and a small amount of diphenols, with the characteristics of renewable, low toxicity, and biodegradability. Therefore, the final products synthesized from it have the characteristics of environmental protection. Low-foaming surfactants have less irritation to human skin and are safer to use. In order to reduce the foaming power of cardanol, in this invention, cardanol is modified to prepare cardanol block polyether. The preparation of cardanol block polyether uses cardanol as the initiator and an acidic catalyst as the initiator, and successively undergoes addition reactions with ethylene oxide and propylene oxide, and then undergoes a substitution reaction with chloroethane under the action of a basic catalyst. This preparation method not only improves the reaction activity, but also reduces the temperature requirement in the synthesis process and reduces the occurrence of side reactions.

[0009] The preparation method of the cardanol block polyether is as follows: (1) Put the initiator and the acidic catalyst into the reaction kettle, replace the nitrogen in the kettle three times, and then add ethylene oxide to carry out ring-opening addition to form intermediate 1; (2) Put intermediate 1 into the reaction kettle, dehydrate at a vacuum degree ≥ 0.095 MPa and 80 - 100 °C for 1 - 2 h, and then add propylene oxide for ring-opening addition to form intermediate 2. After the reaction ends, carry out post-treatment to remove the acidic catalyst; (3) Put intermediate 2 into the reaction kettle, mix it evenly with the basic catalyst under anaerobic conditions, and carry out dehydration treatment at 80 - 100 °C with a stirring speed of 300 - 500 rpm for 1 - 2 h; (4) Cool the mixture to 80 - 100 °C, and then add chloroethane for ethylation reaction. After the reaction ends, carry out desalting treatment to obtain cardanol block polyether.

[0010] Further, in the step (1), the acidic catalyst is one or more of aluminum perchlorate, magnesium perchlorate, and zinc perchlorate, and the addition amount of the acidic catalyst is 0.1% - 0.5% of the amount of substance of the initiator.

[0011] Further, in the step (1), the molar ratio of ethylene oxide to the initiator is (2 - 3) mol: 1 mol, and intermediate 1 is cardanol polyoxyethylene ether.

[0012] Further, the reaction temperature for the ring-opening addition in step (1) is 80 to 100 °C, and the reaction pressure is 0.1 to 0.3 Mpa.

[0013] Further, the molar ratio of propylene oxide to the initiator in step (2) is 1 to 2 mol: 1 mol, and the intermediate 2 is a cardanol propylene oxide adduct.

[0014] Further, the basic catalyst in step (3) is one or more of sodium hydroxide, potassium hydroxide, and sodium methoxide, and the basic catalyst is 0.1% to 0.5% of the amount of substance of intermediate 2.

[0015] Further, the molar ratio of intermediate 2, the basic catalyst to chloroethane in step (3) and step (4) is 1 mol: 5 to 6 mol: 5 to 6 mol.

[0016] In the present invention, cardanol and ethylene oxide are used as the main raw materials, and perchlorate is used as an acidic catalyst. The perchlorate can be hydrolyzed or alcoholyzed to exhibit acidic properties to activate ethylene oxide to form a carbocation, and the carbocation then undergoes a ring-opening addition reaction with alcohol to form a cardanol polyoxyethylene ether oligomer with a certain molecular weight; the cardanol polyoxyethylene ether then undergoes a ring-opening addition reaction with propylene oxide to obtain a cardanol propylene oxide adduct; after dehydration pretreatment of the cardanol propylene oxide adduct, it undergoes a substitution reaction with chloroethane under the action of a basic catalyst to obtain a cardanol block polyether. The dehydration pretreatment in step (3) can effectively remove water, avoid side reactions caused by water, thereby improving the selectivity of the reaction and making the reaction proceed in the direction of forming cardanol block polyether; for the basic catalyst, water will reduce its activity, and through dehydration treatment, it can ensure that the basic catalyst maintains a high catalytic activity in the subsequent reaction, thereby accelerating the reaction process and improving the reaction efficiency. Therefore, the pretreatment in step (3) is indispensable, and without this step, the subsequent substitution reaction cannot proceed. In the present invention, cardanol block polyether is prepared through ring-opening addition and substitution reactions. Compared with the block polyether prepared by traditional methods through multiple addition reactions, the cardanol block polyether has better low-foaming properties. Due to the introduction of ethyl groups through substitution reactions, and the substitution positions of the introduced ethyl groups are diverse, there are a large number of isomeric molecular chain arrangements in the prepared cardanol block polyether, resulting in countless arrangements, so it is not easy to generate crystal orientation arrangements and has a lower foam; in addition, the cardanol block polyether contains hydrophilic groups such as ester groups and hydroxyl groups, but the alkyl groups introduced through substitution reactions are hydrophobic groups, and the hydrophobic groups can provide the function of an emulsifier and have good interfacial activity, further reducing the surface tension and playing a role in defoaming and foam suppression. Therefore, the foaming power of the cardanol block polyether prepared in the present invention is extremely low.

[0017] Furthermore, the Chinese herbal medicine bacteriostatic agent is selected from one or more of wormwood extract, dandelion extract, purslane extract, coptis extract, liquorice extract, eleutherococcus senticosus extract, pomegranate peel extract, and polygonum cuspidatum extract.

[0018] Furthermore, the Chinese herbal medicine bacteriostatic agent is wormwood extract, dandelion extract, and purslane extract, and the weight ratio of the three is 1:1:1.1-1.8.

[0019] Preferably, the Chinese herbal medicine bacteriostatic agent is wormwood extract, dandelion extract, and purslane extract, and the weight ratio of the three is 1:1:1.5.

[0020] The present invention selects Chinese herbal medicine extracts as bacteriostatic raw materials, which not only have low cost, no irritating odor, but also have remarkable bactericidal and bacteriostatic effects; they do not contain harmful chemical substances, have high safety, and do not contain substances that are likely to cause allergies and skin irritation. They are environmentally friendly, non-toxic to humans and animals, and the Chinese herbal medicine extracts have a natural fragrance, which can bring a pleasant experience to people's body and mind. Cardanol has successfully introduced a branched structure through a substitution reaction to obtain cardanol block polyether. The introduction of the branched structure destroys the ordered arrangement of molecules, increases the disorder of molecules, and makes the molecules more stable; at the same time, the branched structure produces a steric hindrance effect, which weakens the interaction between molecules, thereby reducing the tendency of intermolecular aggregation and precipitation. Due to the special molecular structure of cardanol block polyether, it can be more evenly dispersed in water in the detergent system, is not prone to agglomeration and precipitation, and thus maintains the stability of the detergent. Cardanol block polyether provides the basis for chemical stability, while the Chinese herbal medicine bacteriostatic agent further enhances the stability of the detergent by inhibiting the action of microorganisms. The two work together to ensure the stable performance of the detergent during storage and use. Cardanol block polyether agent also affects the growth environment of microorganisms to a certain extent, making the contact between microorganisms and the detergent more sufficient by reducing the surface tension, and increasing the effect of the bacteriostatic agent on microorganisms. When using wormwood extract, dandelion extract, and purslane extract as the main bacteriostatic components of this system, they have good compatibility with the natural non-ionic surfactant saponin and cardanol polyether, and can promote the bacteriostatic performance of saponin. Especially when the weight ratio of the three is 1:1:1.5, they have remarkable bactericidal performance and the performance of inhibiting the growth of pathogenic microorganisms.

[0021] Furthermore, the chelating agent is selected from one or more of trisodium methylglycine diacetate, EDTA-2Na, organic aminophosphonic acid compounds, sodium citrate, and potassium sodium tartrate.

[0022] Preferably, the chelating agent is EDTA-2Na and sodium citrate, and the weight ratio of the two is 1:(0.8-2.0).

[0023] Furthermore, the auxiliary agent is selected from one or more of citric acid, silicone oil, and baking soda.

[0024] Preferably, the auxiliary agent is citric acid and silicone oil, and the weight ratio of the two is 0.5:(1.0 - 1.5).

[0025] Adding citric acid and silicone oil to the system, citric acid can adjust the pH of the floor cleaner, regulate the emulsification and detergency intensity of the tea saponin and cardanol block polyether surfactant, and at the same time make the chelating effect of EDTA-2Na the best; in addition, citric acid also has the function of a chelating agent, adjusting the water quality to make the water quality of the floor cleaner adapt to the corresponding functions and combinations of each raw material. The compounding of citric acid and silicone oil can also play the role of defoaming and anti-slip, and at the same time has the function of thickening, improving the stability of the system.

[0026] The present invention provides a long-acting antibacterial floor cleaner, and the specific preparation method includes the following steps: S1: Add part of the water and the natural non-ionic surfactant to the stirring pot and stir evenly. S2: Then add the remaining water, Chinese herbal medicine antibacterial agent, and chelating agent, stir evenly and adjust the pH to the appropriate range. S3: Finally, add the auxiliary agent and stir evenly to obtain a low-foaming long-acting antibacterial floor cleaner.

[0027] Furthermore, the appropriate range for pH adjustment in step S2 is 6.0 - 7.0.

[0028] The present invention selects Chinese herbal medicine extracts such as Artemisia argyi, Taraxacum mongolicum, and Portulaca oleracea as antibacterial raw materials, which are low in cost, have no pungent odor, have a significant bactericidal and antibacterial effect, are environmentally friendly, non-toxic to humans and animals. Especially when the weight ratio of the three is 1:1:1.5, it has significant bactericidal performance and the performance of inhibiting the growth of pathogenic microorganisms; in addition, natural substances such as tea saponin with low foaming properties and cardanol block polyether prepared by modification are used as surfactants. Among them, cardanol block polyether not only has the characteristic of low foam of common surfactants, but also has an emulsifying effect. After being compounded with components such as Chinese herbal medicine antibacterial agents and auxiliary agents, it can produce a synergistic effect, help improve the antibacterial performance of the product, and at the same time further enhance the stability of the whole system, avoiding adverse phenomena such as flocculation, thus ensuring the detergency of the cleaner.

[0029] The beneficial effects of the present invention are: The present invention provides a long-acting antibacterial floor cleaner and a preparation method thereof. Chinese herbal medicine extracts such as wormwood, dandelion, and purslane are selected as antibacterial raw materials, which are low in cost, have no pungent odor, have significant bactericidal and antibacterial effects, are environmentally friendly, non-toxic to humans and animals. Especially when the weight ratio of the three is 1:1:1.5, it has significant bactericidal performance and the performance of inhibiting the growth of pathogenic microorganisms. In addition, natural substances such as tea saponin with low foaming property and cardanol block polyether prepared by modification are used as surfactants. Cardanol block polyether is obtained by the addition reaction of cardanol with ethylene oxide and propylene oxide in sequence, and then the substitution reaction with chloroethane under the action of an alkaline catalyst. It not only has the characteristic of low foam, but also has good interfacial activity due to the presence of hydrophilic groups such as ester groups and hydroxyl groups and hydrophobic groups such as alkyl groups. After being compounded with components such as non-ionic surfactants, Chinese herbal medicine antibacterial agents, and additives, it can produce a synergistic effect, which helps to improve the antibacterial performance of the product and further enhance the stability of the whole system, avoiding adverse phenomena such as flocculation, so as to ensure the decontamination effect of the cleaner. Detailed Embodiments

[0030] The present invention will be further described below with reference to embodiments, but the present invention is not limited thereto. The experimental methods in the following embodiments are all conventional methods unless otherwise specified.

[0031] Example 1 A long-acting antibacterial floor cleaner, by mass percentage, includes the following components: 10% of natural non-ionic surfactant, 1% of Chinese herbal medicine antibacterial agent, 0.1% of chelating agent, 0.1% of additive, and the balance of water.

[0032] The natural non-ionic surfactant is tea saponin and cardanol polyether, and the weight ratio of the two is 1:0.5; the Chinese herbal medicine antibacterial agent is wormwood extract, dandelion extract, and purslane extract, and the weight ratio of the three is 1:1:1.5; the chelating agent is EDTA-2Na and sodium citrate, and the weight ratio of the two is 1:0.8; the additive is citric acid and silicone oil, and the weight ratio of the two is 0.5:1.0.

[0033] The preparation method of cardanol block polyether is as follows: (1) Put cardanol and aluminum perchlorate with a molar amount of 0.1% of cardanol into a reaction kettle, replace the nitrogen in the kettle three times, and then add ethylene oxide. The molar ratio of ethylene oxide to fatty alcohol is 2mol:1mol, and ring-opening addition is carried out at 100 °C and 0.1 Mpa to form cardanol polyoxyethylene ether; (2) Put cardanol polyoxyethylene ether into a reaction kettle. After dehydrating for 1 h under a vacuum degree ≥ 0.095 MPa and at 100 °C, then add propylene oxide for ring-opening addition to form cardanol propylene oxide adduct. The molar ratio of propylene oxide to cardanol is 1 mol: 1 mol. After the reaction ends, conduct post-treatment to remove aluminum perchlorate; (3) Put the reaction kettle of propylene oxide adduct into a reaction kettle, mix evenly with sodium hydroxide under anaerobic conditions, and conduct dehydration treatment for 1 h under the conditions of 100 °C and a stirring speed of 300 rpm; (4) Cool the mixture to 90 °C, then add chloroethane for ethylation reaction. The molar ratio of cardanol propylene oxide adduct, sodium hydroxide to chloroethane is 1 mol: 5 mol: 5 mol. After the reaction ends, conduct desalting treatment to obtain cardanol block polyether.

[0034] A specific preparation method of a long-acting antibacterial floor cleaner includes the following steps: S1: Add part of water and natural non-ionic surfactant to a stirring pot and stir evenly; S2: Then add the remaining water, Chinese herbal medicine antibacterial agent, and chelating agent, stir evenly and adjust the pH to 6.0; S3: Finally, add an auxiliary agent and stir evenly to obtain a low-foaming long-acting antibacterial floor cleaner.

[0035] Example 2 A long-acting antibacterial floor cleaner, by mass percentage, includes the following components: 15% natural non-ionic surfactant, 5% Chinese herbal medicine antibacterial agent, 8% chelating agent, 5% auxiliary agent, and the balance is water.

[0036] The natural non-ionic surfactant is tea saponin and cardanol polyether, and the weight ratio of the two is 1:1; the Chinese herbal medicine antibacterial agent is wormwood extract, dandelion extract, purslane extract, and the weight ratio of the three is 1:1:1.5; the chelating agent is EDTA-2Na and sodium citrate, and the weight ratio of the two is 1:1.4; the auxiliary agent is citric acid and silicone oil, and the weight ratio of the two is 0.5:1.3.

[0037] The preparation method of cardanol block polyether is as follows: (1) Put cardanol and magnesium perchlorate with a molar amount of 0.3% of fatty alcohol into a reaction kettle, replace the nitrogen in the kettle three times, and then add ethylene oxide. The molar ratio of ethylene oxide to fatty alcohol is 2.5 mol: 1 mol, and conduct ring-opening addition at 110 °C and 0.2 Mpa to form cardanol polyoxyethylene ether; (2) Put cardanol polyoxyethylene ether into the reaction kettle. After dehydrating for 1.5 h under the conditions of a vacuum degree ≥ 0.095 MPa and 110 °C, then add propylene oxide for ring-opening addition to form cardanol propylene oxide adduct. The molar ratio of propylene oxide to cardanol is 1.5 mol: 1 mol. After the reaction ends, conduct post-treatment to remove magnesium perchlorate; (3) Put the reaction kettle of the propylene oxide adduct into the reaction kettle, mix evenly with potassium hydroxide under anaerobic conditions, and conduct dehydration treatment for 1.5 h under the conditions of 110 °C and a stirring speed of 400 rpm; (4) Cool the mixture to 95 °C, then add chloroethane for ethylation reaction. The molar ratio of cardanol propylene oxide adduct, potassium hydroxide to chloroethane is 1 mol: 5.5 mol: 5.5 mol. After the reaction ends, conduct desalting treatment to obtain cardanol block polyether.

[0038] A specific preparation method of a long-acting antibacterial floor cleaner includes the following steps: S1: Add part of the water and natural non-ionic surfactant to the stirring pot and stir evenly; S2: Then add the remaining water, Chinese herbal medicine antibacterial agent, chelating agent, stir evenly and adjust the pH to 6.5; S3: Finally, add the auxiliary agent and stir evenly to obtain a low-foam long-acting antibacterial floor cleaner.

[0039] Example 3 A long-acting antibacterial floor cleaner, by mass percentage, includes the following components: 20% of natural non-ionic surfactant, 10% of Chinese herbal medicine antibacterial agent, 15% of chelating agent, 10% of auxiliary agent, and the balance of water.

[0040] The natural non-ionic surfactant is tea saponin and cardanol polyether, and the weight ratio of the two is 1:1.5; the Chinese herbal medicine antibacterial agent is wormwood extract, dandelion extract, purslane extract, and the weight ratio of the three is 1:1:1.5; the chelating agent is EDTA-2Na, sodium citrate, and the weight ratio of the two is 1:2.0; the auxiliary agent is citric acid, silicone oil, and the weight ratio of the two is 0.5:1.5.

[0041] The preparation method of cardanol block polyether is as follows: (1) Put cardanol and zinc perchlorate with a molar amount of 0.5% of fatty alcohol into the reaction kettle. Replace the nitrogen in the kettle three times, and then add ethylene oxide. The molar ratio of ethylene oxide to fatty alcohol is 3 mol: 1 mol. Conduct ring-opening addition at 120 °C and 0.3 Mpa to form cardanol polyoxyethylene ether; (2) Put cardanol polyoxyethylene ether into a reaction kettle. After dehydrating for 2 h under a vacuum degree ≥0.095 MPa and at 120 °C, then add propylene oxide for ring-opening addition to form cardanol propylene oxide adduct. The molar ratio of propylene oxide to fatty alcohol is 2 mol:1 mol. After the reaction ends, conduct post-treatment to remove zinc perchlorate; (3) Put the reaction kettle of propylene oxide adduct into a reaction kettle, mix evenly with sodium methoxide under anaerobic conditions, and conduct dehydration treatment for 2 h at 120 °C with a stirring speed of 500 rpm; (4) Cool the mixture to 100 °C, then add chloroethane for ethylation reaction. The molar ratio of cardanol propylene oxide adduct, sodium methoxide to chloroethane is 1 mol:6 mol:6 mol. After the reaction ends, conduct desalting treatment to obtain cardanol block polyether.

[0042] A specific preparation method of a low-foam machine-wash floor cleaner includes the following steps: S1: Add part of water, non-ionic surfactant, and co-solvent to a stirring pot, and stir evenly; S2: Then add the remaining water, bacteriostatic agent, and chelating agent, stir evenly and adjust the pH to 8.0; S3: Finally, add the remaining auxiliaries, stir evenly to obtain a low-foam machine-wash floor cleaner.

[0043] Comparative Example 1: This Comparative Example 1 is basically the same as Example 2, except that step (2) is omitted during the process of cardanol block polyether.

[0044] Comparative Example 2: This Comparative Example 2 is basically the same as Example 2, except that step (3) is omitted during the process of cardanol block polyether.

[0045] Comparative Example 3: This Comparative Example 2 is basically the same as Example 2, except that step (4) is omitted during the process of cardanol block polyether.

[0046] Comparative Example 4: This Comparative Example 2 is basically the same as Example 2, except that the weight ratio of wormwood extract, dandelion extract, and purslane extract is 1:1:1.1.

[0047] Comparative Example 5: This Comparative Example 2 is basically the same as Example 2, except that the weight ratio of wormwood extract, dandelion extract, and purslane extract is 1:1:1.8.

[0048] Test experiment: For the floor cleaner samples prepared in Examples 1-3 and Comparative Examples 1-5, conduct evaluation through the following methods.

[0049] 1. Bacteriostatic rate test: Refer to "QB / T2738 Evaluation Method for Antibacterial and Bacteriostatic Effects of Daily Chemical Products".

[0050] 2. Detergency test: Refer to "QB / T 4532-2013 Evaluation Method for Hard Floor Cleaners".

[0051] 3. Stability test: Seal the sample in a bottle and place it in an oven at 45 °C for 4 weeks. Restore to room temperature and observe the appearance.

[0052] 4. Foaming power test method: Prepare a 2 g / L solution of the sample with tap water. Take 20 mL and put it into a 100 mL stoppered graduated cylinder. Cover with a ground glass stopper and shake vigorously up and down 10 times (one round trip counts as one time). Record the foam height when the shaking is completed.

[0053] The experimental results are shown in Table 1: Table 1 Performance test results of floor cleaner samples Sample Bacteriostatic rate Detergency Stability Foaming power (mm) Example 1 97.82% 96.72% No change 15 Example 2 99.02% 97.08% No change 14 Example 3 98.55% 95.73% No change 11 Comparative example 1 90.13% 92.54% Layering 75 Comparative example 2 92.85% 93.18% Turbidity 80 Comparative example 3 88.44% 90.58% Turbidity 95 Comparative example 4 96.28% 91.08% Layering 25 Comparative example 5 95.75% 87.94% Turbidity 19 The present invention provides a long-acting antibacterial floor cleaner, which selects Chinese herbal medicine extracts as antibacterial raw materials, is environmentally friendly, non-toxic to humans and animals. In addition, natural substances such as tea saponin and cardanol block polyether are used as surfactants. Among them, cardanol block polyether not only has the characteristic of low foam, but also has good interfacial activity. After being compounded with components such as non-ionic surfactants, Chinese herbal medicine antibacterial agents, and auxiliaries, it can produce a synergistic effect, which helps to improve the antibacterial performance of the product and further enhance the stability and detergency of the whole system; as can be seen from Table 1, the antibacterial rates of the example samples are all greater than 97.82%, significantly higher than those of the comparative examples, and the detergency, stability, and foaming power of the samples are also higher than those of the comparative examples; in Comparative Example 1, there is no ring-opening addition with propylene oxide. Similarly, in Comparative Example 2, due to the lack of dehydration pretreatment in step (3) and in Comparative Example 3, there is no step (4), so no branched chains are introduced through substitution reactions, and the foaming power of the product cannot be significantly reduced. In Comparative Examples 4 and 5, due to the weight ratio of wormwood extract, dandelion extract, and purslane extract not being 1:1:1.5, the antibacterial performance of the obtained product is slightly lower than that of the examples.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A long-lasting antibacterial floor cleaner, characterized in that: Calculated by mass percentage, it includes the following components: 10% to 20% natural non-ionic surfactant, 1% to 10% Chinese herbal antibacterial agent, 0.1% to 15% chelating agent, 0.1% to 10% auxiliary agent, and the balance water.

2. A long-lasting antibacterial floor cleaner according to claim 1, characterized in that: The natural nonionic surfactant is tea saponin and cardanol block polyether, and the weight ratio of the two is 1:0.5-1.

5.

3. A long-lasting antibacterial floor cleaner according to claim 2, characterized in that: The cardanol block polyether is prepared by modifying cardanol using cardanol as a starter and an acid catalyst as an initiator. The specific preparation method is as follows: (1) The initiator and the acid catalyst are placed in a reaction kettle, the atmosphere in the kettle is replaced with nitrogen three times, and then ethylene oxide is added to form an intermediate 1 by ring-opening addition reaction; (2) intermediate 1 is placed in a reaction kettle, and after dehydration for 1 to 2 hours at a vacuum degree of ≥0.095 MPa and 80 to 100°C, propylene oxide is added for ring-opening addition to form intermediate 2. After the reaction is completed, post-treatment is performed to remove the acidic catalyst; (3) The intermediate 2 is placed in a reaction kettle, mixed evenly with the alkaline catalyst under anaerobic conditions, and dehydrated for 1 to 2 hours at 80 to 100° C. and a stirring speed of 300 to 500 rpm; (4) The mixture is cooled to 80-100°C, and ethyl chloride is added to carry out ethylation reaction. After the reaction is completed, desalination treatment is carried out to obtain cardanol block polyether.

4. A long-lasting antibacterial floor cleaner according to claim 3, characterized in that: In the step (1), the acidic catalyst is one or more of aluminum perchlorate, magnesium perchlorate, and zinc perchlorate, the amount of the acidic catalyst added is 0.1% to 0.5% of the amount of the initiator substance, the molar ratio of ethylene oxide to the initiator is 2 to 3 mol:1 mol, the intermediate 1 is cardanol polyoxyethylene ether, the reaction temperature of the ring-opening addition is 80 to 100° C., and the reaction pressure is 0.1 to 0.3 MPa.

5. The long-lasting antibacterial floor cleaner according to claim 3, characterized in that: In the step (2), the molar ratio of propylene oxide to the initiator is 1-2 mol:1 mol, and the intermediate 2 is a cardanol propylene oxide adduct.

6. The long-lasting antibacterial floor cleaner according to claim 3, characterized in that: The alkaline catalyst in step (3) is one or more of sodium hydroxide, potassium hydroxide, and sodium methoxide, and the alkaline catalyst accounts for 0.1% to 0.5% of the mass of the intermediate 2.

7. The long-lasting antibacterial floor cleaner according to claim 3, characterized in that: The molar ratio of the intermediate 2, the alkaline catalyst and ethyl chloride in step (3) and step (4) is 1 mol: 5-6 mol: 5-6 mol.

8. The long-lasting antibacterial floor cleaner according to claim 1, characterized in that: The Chinese herbal antibacterial agent is wormwood extract, dandelion extract, and purslane extract, and the weight ratio of the three is 1:1:1.1-1.8; the chelating agent is EDTA-2Na and sodium citrate, and the weight ratio of the two is 1:0.8-2.0; the auxiliary agent is citric acid and silicone oil, and the weight ratio of the two is 0.5:1.0-1.

5.

9. A method for preparing a long-lasting antibacterial floor cleaner according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1: Add some water and natural non-ionic surfactant into a stirring pot and stir evenly; S2: Add the remaining amount of water, Chinese herbal antibacterial agent, and chelating agent, stir evenly, and adjust the pH to a suitable range; S3: Finally, add the auxiliary agent and stir evenly to obtain a low-foaming, long-lasting antibacterial floor cleaner.

10. The method for preparing a long-lasting antibacterial floor cleaner according to claim 9, characterized in that: The suitable range of pH adjustment in step S2 is 6.0 to 7.0.