A foaming anti-mildew spray and its preparation method

Abstract

The present application relates to a kind of foam-rich mould-removing spray, it is characterized in that, by weight percentage, including the following components: sodium hypochlorite aqueous solution, by chlorine element: 1~8%;Base agent, by hydroxyl ion: 0.1~4%;Foam stabilizing component, by active substance: 1~8%;Chlorine stabilizer: 0.05~1%;Water: remainder;The base agent includes at least one of sodium hydroxide or potassium hydroxide;Active substance in the foam stabilizing component includes zwitterionic surfactant and alkyl benzene sulfonate.The present application creates a stable foam system in high alkali, high hypochlorite ion environment by the specific compounding of zwitterionic surfactant and alkyl benzene sulfonate.Successfully solved the technical problem that "strong oxidizing property" and "foam stability" are difficult to consider.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products technology, and in particular to a foam-rich anti-mildew spray and its preparation method. Background Technology

[0002] Mold is a common problem in both home and industrial environments, especially in damp areas such as bathrooms, kitchen corners, and window frames.

[0003] Currently, commercially available mold removal products mainly fall into two categories: Traditional chlorine bleach / mold remover uses sodium hypochlorite as its core ingredient, killing and bleaching mold through strong oxidation. However, it has significant drawbacks: low viscosity, high fluidity, very little foam, and rapid dripping after being sprayed on vertical surfaces. This results in short contact time between the active ingredient and the mold, requiring repeated spraying. It also easily corrodes items below and has a strong, pungent chlorine odor. Foaming alkaline cleaners / mold removers: These produce a viscous texture or temporary foam through thickeners (such as polymers, magnesium aluminum silicate, etc.). Their disadvantages include poor stability in killing mold and the bleaching core (sodium hypochlorite). Strong oxidizing properties rapidly destroy most foaming agents and thickeners, leading to a sharp decline in foam performance and viscosity after storage, or even complete inability to coexist stably with high concentrations of hypochlorite. Furthermore, some gel-like products dry out easily, leaving noticeable residue after cleaning. Therefore, there is an urgent need in this field for a product that can combine a powerful mold-removing ingredient with a long-lasting and stable foam system, enabling it to adhere tightly to vertical walls and crevices, prolonging the action time, and improving user experience and mold removal effect. Summary of the Invention

[0004] Based on this, the present invention provides a foam-rich mold-removing spray and its preparation method. This spray produces rich and fine foam that can remain on vertical surfaces, ceilings, and even rough surfaces for a long time, without easily dripping or dissipating quickly. This strong adhesion effectively prolongs the action time of the mold-removing ingredients, thereby achieving a more thorough mold removal effect. At the same time, this formula also slows down the rapid dissipation of irritating odors, improving the user experience.

[0005] First aspect: A foaming mildew remover spray, comprising the following components by weight percentage: Sodium hypochlorite aqueous solution, calculated as chlorine element: 1~8%; Alkali agent, calculated as hydroxide: 0.1~4%; Foam-stabilizing components, calculated as active substances: 1~8%; Chlorine stabilizer: 0.05~1%; Water: Balance; The alkaline agent includes at least one of sodium hydroxide or potassium hydroxide; The active substances in the foam-stabilizing component include zwitterionic surfactants and alkylbenzene sulfonates.

[0006] This invention creates a foam system stable in a highly alkaline, high-hypochlorite ion environment through a specific compounding of zwitterionic surfactants and alkylbenzene sulfonates. It successfully solves the technical problem of simultaneously achieving strong oxidizing properties and foam stability.

[0007] The synergistic mechanism of this formulation is as follows: zwitterionic surfactants provide excellent initial foaming power and foam elasticity; alkylbenzene sulfonates, as key water-soluble growth promoters, ensure the full dissolution of all components. Moreover, the unique molecular structure of alkylbenzene sulfonates can synergize with zwitterionic surfactants under specific ionic environments, significantly enhancing the strength of the foam wall and the viscosity of the liquid film, thereby achieving the effect of "drug-carrying foam for sustained release".

[0008] Based on the above synergistic effects, the mold-removing spray of the present invention can produce rich and dense foam when sprayed, which can firmly adhere to vertical surfaces for more than 3 minutes without collapsing or dripping quickly, allowing the hypochlorous acid component sufficient time to penetrate, kill and bleach the mold roots.

[0009] Furthermore, the mold-removing spray of the present invention has excellent storage performance. Due to the amphoteric surfactant and alkylbenzene sulfonate having a certain tolerance to oxidizing environment, and in combination with a special chlorine stabilizer, the effective chlorine retention rate of this product is still greater than 90% after 3 months of storage at room temperature, and the foam performance (initial foaming height and foam stability) decreases by less than 15%, which is far superior to products using conventional surfactants.

[0010] Furthermore, the mold-removing spray of this invention enhances user experience and safety. The dense foam effectively reduces aerosol splashing during spraying and slows the diffusion of irritating odors, making it more user-friendly. Simultaneously, the extended working time means users don't need frequent re-spraying, improving cleaning efficiency and reducing the total amount of chemicals used.

[0011] As a preferred embodiment, the zwitterionic surfactant comprises at least one of cocamidopropylamine oxide, cocamidopropylamine oxide, or cocamidopropyl betaine. It exhibits excellent foaming properties under alkaline conditions and can synergistically work with alkylbenzene sulfonates.

[0012] As a preferred embodiment, the alkylbenzene sulfonate has 1 to 3 C1 to C4 alkyl groups as substituents on its benzene ring, and the alkylbenzene sulfonate is at least one of an alkali metal salt, an alkaline earth metal salt, or an ammonium salt. In strongly alkaline, high-ionic-strength sodium hypochlorite solution, alkylbenzene sulfonates simultaneously play a unique role in promoting water solubility and stabilizing / thickening foam, which is crucial for maintaining the long-term stability of the entire foam system in harsh chemical environments.

[0013] As a preferred embodiment, the mass ratio of the zwitterionic surfactant to the alkylbenzene sulfonate is 1:0.8 to 1:3.0. More preferably, it is 1:1.4 to 1:2.5. At this specific ratio, the richest and most stable "wet bubbles" are produced, and the adhesion performance is optimal.

[0014] As a preferred embodiment, the chlorine stabilizer is preferably at least one of sodium silicate, magnesium nitrate, or potassium nitrate. The chlorine stabilizer is used to slow down the decomposition of sodium hypochlorite, thereby protecting the foaming / stabilizing system.

[0015] The second aspect: A method for preparing a mold-removing spray as described in the first aspect includes the following steps: Premixed alkali and functional agent: Mix 60-90% of the formula amount of water with the alkali agent and alkylbenzene sulfonate, and stir until completely dissolved to obtain a clear solution; Introducing the foaming core: Add the zwitterionic surfactant to the clarified solution and stir evenly to obtain a transparent or slightly turbid base liquid; System stabilization: Add the chlorine stabilizer to the base liquid and stir until homogeneous to obtain the second base liquid; Low-temperature addition of strong oxidizing agent: Cool the second base liquid to below 35°C, add the sodium hypochlorite aqueous solution, stir evenly, then add the remaining amount of water in the formula, continue stirring evenly, and let stand for aging for at least 4 hours to obtain the mold removal spray.

[0016] In the preparation of anti-mold sprays, the aging process can make sodium hypochlorite more stable and reduce irritation.

[0017] As a preferred method, the entire preparation process is kept below 30°C. This ensures production while inhibiting the decomposition of sodium hypochlorite. Detailed Implementation

[0018] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0019] A foaming mildew remover spray, comprising the following components by weight percentage: Sodium hypochlorite aqueous solution, calculated as chlorine element: 1~8%, (more preferably 2~5%). Alkali, calculated as hydroxide: 0.1-4% (more preferably 1-2.5%). Foam-stabilizing components, calculated as active substances: 1~8%; Chlorine stabilizer: 0.05~1%, (more preferably 0.1~0.5%); Water: Balance; Alkali agents include at least one of sodium hydroxide or potassium hydroxide.

[0020] The active substances in the foam-stabilizing components include zwitterionic surfactants and alkylbenzene sulfonates.

[0021] Amphoteric surfactants include at least one of cocamidopropylamine oxide, cocamidopropylamine oxide, or cocamidopropyl betaine.

[0022] The alkylbenzene sulfonate has 1 to 3 C1 to C4 alkyl groups as substituents on the benzene ring, and the alkylbenzene sulfonate is at least one of an alkali metal salt, an alkaline earth metal salt, or an ammonium salt.

[0023] The mass ratio of the zwitterionic surfactant to the alkylbenzene sulfonate is 1:0.8 to 1:3.0. More preferably, it is 1:1.4 to 1:2.5.

[0024] The chlorine stabilizer is preferably at least one of sodium silicate, magnesium nitrate, or potassium nitrate.

[0025] A method for preparing a mold-removing spray includes the following steps: The entire preparation process is kept below 30°C.

[0026] Premixed alkali and functional agent: Mix 60-90% of the formula amount of water with alkali and alkylbenzene sulfonate, stir until completely dissolved, and obtain a clear solution.

[0027] Introducing the foaming core: Add an amphoteric surfactant to the clear solution and stir until homogeneous to obtain a transparent or slightly turbid base liquid.

[0028] System stabilization: Add chlorine stabilizer to the base liquid and stir evenly to obtain the second base liquid.

[0029] Add a strong oxidizing agent at low temperature: Add sodium hypochlorite aqueous solution to the second base liquid, stir evenly, then add the remaining amount of water in the formula, continue to stir evenly, and let stand for aging for at least 4 hours to obtain the mold removal spray.

[0030] Example 1 To prepare 1000g of mold-removing spray, follow these steps: Weigh the raw materials, including the following components: Deionized water: 574.2g; Sodium hydroxide (32wt% by mass): 30g; Sodium p-toluenesulfonate: 60g; Cocamidopropylamine oxide: 33.3g; Sodium silicate: 2.5g; Sodium hypochlorite solution (available chlorine content 10%): 300g (equivalent to 30g of pure available chlorine, i.e., 3%).

[0031] Preparation: In a reactor equipped with a stirrer and an ice-water bath, add approximately 500g of deionized water and start stirring. Add 32wt% NaOH solution and sodium p-toluenesulfonate sequentially, stirring until completely dissolved. Then, slowly add cocamidopropylamine oxide, stirring for approximately 15 minutes until the system is homogeneous. Next, add the chlorine stabilizer—sodium silicate—and stir for 5 minutes. Under continuous stirring and cooling, slowly add sodium hypochlorite solution in a thin stream, controlling the temperature to remain below 30℃. After the addition is complete, add the remaining water to bring the total volume to 1000g, and continue stirring for 30 minutes. Discharge the product, age for 12 hours to obtain the anti-mold spray, and fill it into a spray pump bottle.

[0032] Example 2 To prepare 1000g of mold-removing spray, follow these steps: Weigh the raw materials, including the following components: Deionized water: 574.2g; Sodium hydroxide (32wt% by mass): 30g; Sodium p-toluenesulfonate: 60g; Coco-based dimethylamine oxide: 33.3g; Sodium silicate: 2.5g; Sodium hypochlorite solution (available chlorine content 10%): 300g (equivalent to 30g of pure available chlorine, i.e., 3%).

[0033] Preparation: In a reactor equipped with a stirrer and an ice-water bath, add approximately 500g of deionized water and start stirring. Add 32wt% NaOH solution and sodium p-toluenesulfonate sequentially, stirring until completely dissolved. Then, slowly add cocoyl dimethylamine oxide, stirring for approximately 15 minutes until the system is homogeneous. Next, add the chlorine stabilizer—sodium silicate—and stir for 5 minutes. While continuously stirring and cooling, slowly add sodium hypochlorite solution in a thin stream, controlling the temperature to remain below 30℃. After the addition is complete, add the remaining water to bring the total volume to 1000g, and continue stirring for 30 minutes. Discharge the product, age for 12 hours to obtain the anti-mold spray, and fill it into a spray pump bottle.

[0034] Example 3 To prepare 1000g of mold-removing spray, follow these steps: Weigh the raw materials, including the following components: Deionized water: 574.2g; Sodium hydroxide (32wt% by mass): 30g; p-Ethylbenzenesulfonamide: 60g; Cocoyl dimethyl betaine: 33.3g; Sodium silicate: 2.5g; Sodium hypochlorite solution (available chlorine content 10%): 300g (equivalent to 30g of pure available chlorine, i.e., 3%).

[0035] Preparation: In a reactor equipped with a stirrer and an ice-water bath, add approximately 500g of deionized water and start stirring. Add 32wt% NaOH solution and p-ethylbenzenesulfonamide sequentially, stirring until completely dissolved. Then, slowly add cocoyl dimethyl betaine, stirring for approximately 15 minutes until the system is homogeneous. Next, add the chlorine stabilizer—potassium nitrate—and stir for 5 minutes. Under continuous stirring and cooling, slowly add sodium hypochlorite solution in a thin stream, controlling the temperature to remain below 30℃. After the addition is complete, add the remaining water to bring the total volume to 1000g, and continue stirring for 30 minutes. Discharge the product, age for 12 hours to obtain the anti-mold spray, and fill it into a spray pump bottle.

[0036] Comparative Example 1 Except for the absence of sodium alkylbenzene sulfonate, the formulation uses the same amounts of other components as in Example 1, with the sodium alkylbenzene sulfonate replaced by an equal amount of deionized water.

[0037] Comparative Example 2 Except for the absence of cocamidopropylamine oxide, the formulation uses the same amounts of other components as in Example 1, with the mass of cocamidopropylamine oxide replaced by an equal amount of deionized water.

[0038] Comparative Example 3 Commercially available products include: Clorox mold remover spray, Clean & Easy multi-effect mold remover, and Clean & White mold and sludge cleaner. Example 1 is a preferred embodiment of the present invention. The performance test results of Examples 1-3 compared with Comparative Examples 1-3 are shown in Table 1. Table 1. Performance comparison of anti-mold sprays in Examples 1-3 and Comparative Examples 1-3

[0039] The testing methods for each project are as follows: Method for determining vertical surface adhesion time: Spray once on the same vertical surface using the same nozzle and record the foam condition.

[0040] Simulated mold removal effect measurement method: Stick the moldy fabric onto a vertical surface, spray it with the same nozzle, and record the mold removal effect.

[0041] Storage stability test method: compare the foaming and available chlorine levels of the samples before and after 30 days in a 40℃ oven.

[0042] The above embodiments are merely illustrative of several implementations of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. For those skilled in the art, various modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A foaming mildew-removing spray, characterized in that, By weight percentage, it includes the following components: Sodium hypochlorite aqueous solution, calculated as chlorine element: 1~8%; Alkali agent, calculated as hydroxide: 0.1~4%; Foam-stabilizing components, calculated as active substances: 1~8%; Chlorine stabilizer: 0.05~1%; Water: Balance; The alkaline agent includes at least one of sodium hydroxide or potassium hydroxide; The active substances in the foam-stabilizing component include zwitterionic surfactants and alkylbenzene sulfonates.

2. The mold-removing spray according to claim 1, characterized in that, The zwitterionic surfactant includes at least one of cocamidopropylamine oxide, cocamidodimethylamine oxide, or cocamidodimethylbetaine.

3. The mold-removing spray according to claim 1, characterized in that, The alkylbenzene sulfonate has 1 to 3 C1 to C4 alkyl groups as substituents on the benzene ring, and the alkylbenzene sulfonate is at least one of an alkali metal salt, an alkaline earth metal salt, or an ammonium salt.

4. The mold-removing spray according to claim 1, characterized in that, The mass ratio of the zwitterionic surfactant to the alkylbenzene sulfonate is 1:0.8 to 1:3.

0.

5. The mold-removing spray according to claim 1, characterized in that, The chlorine stabilizer is preferably at least one of sodium silicate, magnesium nitrate, or potassium nitrate.

6. A method for preparing the anti-mold spray according to any one of claims 1 to 5, characterized in that, Includes the following steps: Mix 60-90% of the formula amount of water with the alkaline agent and alkylbenzene sulfonate, and stir until completely dissolved to obtain a clear solution; Add the zwitterionic surfactant to the clarified solution and stir until homogeneous to obtain a transparent or slightly turbid base solution; Add the chlorine stabilizer to the base liquid and stir until homogeneous to obtain the second base liquid; Cool the second base liquid to below 35°C, add the sodium hypochlorite aqueous solution, stir evenly, then add the remaining amount of water in the formula, continue stirring evenly, and let it stand and age for at least 4 hours to obtain the mold-removing spray.

7. The method for preparing the anti-mold spray according to claim 6, characterized in that, The entire preparation process is carried out at a temperature below 30°C.

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