Mould-removing gel composition not easy to dissolve into water at high temperature and preparation method of mould-removing gel composition

Abstract

The invention relates to a mildew-removing gel composition not easy to dissolve water at high temperature and a preparation method thereof, and belongs to the technical field of mildew removal, the mildew-removing gel composition comprises a component A: a 10% sodium hypochlorite solution, and a component B: hectorite, a porous material, an alkali metal electrolyte and deionized water, the hectorite is deironed hectorite, and the pH value range is 10-11. The problems of high-temperature stability (high-temperature water melting and mildew removal failure) and water separation of the strong oxidation system gel are solved. The mildew-removing gel composition is composed of pure inorganic components and does not contain a surfactant, hectorite which has the pH value range of 10-11 and is subjected to iron removal treatment is adopted as a thickening agent, and the problems that a deep mildew-removing effect cannot be achieved due to the fact that a strong oxidation system cannot keep a gel state, and mildew removal fails due to the fact that effective active ingredients cannot be kept within the shelf life are solved. The discoloration problem of gel redness, yellowing and the like in the storage period is solved; meanwhile, porous materials such as sepiolite are used for solving the problem of water diversion during gel storage.

Description

Technical Field

[0001] The present invention belongs to the technical field of mildew removal, and particularly relates to a mildew removal gel composition that is not prone to melting into water at high temperatures and a preparation method thereof. Background Art

[0002] Currently, commercially available mildew removal gel products generally face the problems of becoming thin and melting into water within the validity period. Several popular products on the market were tested, and the problem of melting into water exists in all of them. The melting of the gel has led to many related customer complaints for the products, affecting the sales volume and conversion rate of the products.

[0003] Patent application document CN111349527A discloses a mildew removal gel and a preparation method thereof. In the description of the patent application content, the thickener is selected from any one or a mixture of two or more of guar gum, acrylic resin, dodecyldimethylamine oxide, and tetradecyldimethylamine oxide. The thickeners are all organic substances, and under the condition of mixing with sodium hypochlorite, they will quickly oxidize and decompose and become ineffective. When heated to a temperature of 45 - 54 degrees Celsius, the storage time does not even exceed three days; in addition, sodium hypochlorite is a strong electrolyte, and it is difficult for acrylic resin to achieve a thickening effect, and stratification and precipitation will occur. Therefore, such a system cannot use sodium hypochlorite as the main component for disinfection.

[0004] Patent application document CN113197825A discloses an antibacterial and deodorant film-forming spray liquid and a preparation method thereof. The patent application content describes a method of forming a tight and firm gel structure by using ethyl cellulose and hydroxyacrylic resin to form a film synergistically, but its disinfection and antibacterial components can only use composite disinfectants without strong oxidation characteristics such as triclosan and benzalkonium chloride.

[0005] Patent application document CN111567518A discloses a gel-like sodium hypochlorite disinfectant, a preparation method thereof, and applications. The main gelling agent of the gel-like sodium hypochlorite disinfectant is sodium alginate. The disinfectant has high stability and can achieve continuous, effective, and slow release of available chlorine. However, the gel temperature of the system of this invention cannot exceed 35 °C, and the highest temperature in most regions of our country easily exceeds this temperature limit. Therefore, the purpose of long-term storage cannot be achieved; in addition, sodium alginate also belongs to organic substances, which is easy to shield the disinfection effect, and the system obtained by such thickeners is a non-viscous gel-like.

[0006] Patent application document CN111493091A discloses a disinfectant, a preparation method thereof, and applications. The sodium hypochlorite disinfection system using polyvinyl alcohol as the gelling agent has high stability and can achieve continuous and effective slow release of available chlorine. However, polyvinyl alcohol is also an organic substance with poor antioxidant stability, and it is difficult to achieve the control level of available chlorine within the product shelf life, and it has no high-temperature resistance performance.

[0007] Patent application documents US7622434B2, US20070111911A1, and US20060241002A1 disclose a preparation method of a disinfection gel targeting the human body. This system uses sodium hypochlorite, and the thickener is montmorillonite-based, combined with a small amount of organic thickener and electrolyte. However, the content of sodium hypochlorite can only be made below 1%; some organic thickeners used therein, such as xanthan gum, will be quickly decomposed under the condition of high-concentration sodium hypochlorite, such as a content of 3%.

[0008] The active ingredient of the mold-removing gel is sodium hypochlorite, which is inherently strongly alkaline and strongly oxidizing. Generally, gel agents / thickeners are easily decomposed in this system, resulting in the phenomenon of turning into water; at the same time, sodium hypochlorite also has the problem of instability, and the active ingredient is extremely easy to decompose, resulting in poor mold-removing effect. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a mold-removing gel composition that is not prone to turning into water at high temperatures and its preparation method, and solve the problems of high-temperature stability (turning into water at high temperatures and mold-removing failure) and water separation in the strong oxidation system gel. The formulation system of the present invention is composed of pure inorganic components and does not contain surfactants.

[0010] To solve the above problems, the present invention is achieved through the following technical solutions:

[0011] The first object of the present invention is:

[0012] To provide a mold-removing gel composition that is not prone to turning into water at high temperatures, which includes the following components by mass percentage:

[0013] Component A: 15 - 30% of a sodium hypochlorite solution with a mass percentage concentration of 10%;

[0014] Component B: 1 - 10% of lithium soapstone, 0.1 - 0.5% of porous material, 0.1 - 2.0% of alkali metal electrolyte, and deionized water is made up to 100%;

[0015] The lithium soapstone described is lithium soapstone that has undergone deironing treatment, with a pH value range of 10 - 11 and an iron content not exceeding 3 ppm, solving the problems that the strong oxidation system cannot maintain the gel state and thus cannot achieve the deep mold-removing effect, and cannot maintain the effective active ingredient within the shelf life, resulting in mold-removing failure and color change such as redness and yellowness of the gel during the storage period.

[0016] The further optimization of the mold-removing gel composition that is not prone to turning into water at high temperatures of the present invention is:

[0017] The porous material described above is sepiolite. Using porous materials such as sepiolite can solve the problem of water separation in gel storage. Sepiolite is a fibrous magnesium silicate hydrate mineral with a relatively high specific surface area and a unique pore structure, and has good adsorption capacity for water and polar substances; sepiolite has certain high-temperature resistance, and its crystal structure does not change within 500 °C; sepiolite also has certain acid and alkali resistance and can resist the erosion of corrosive substances such as acids and alkalis. In the present invention, using sepiolite can optimize the problem of water separation in the mildew-removing gel system.

[0018] A further optimization of the mildew-removing gel composition that is not prone to water separation at high temperatures in the present invention is as follows:

[0019] The alkali metal electrolyte described above is one or a combination of several of sodium chloride, sodium carbonate, and sodium hydroxide.

[0020] The second object of the present invention is:

[0021] To provide a preparation method of a mildew-removing gel composition that is not prone to water separation at high temperatures, which includes the following preparation steps:

[0022] Component B is dispersed at a high speed of 1500 - 3000 revolutions per minute for 30 minutes, the rotation speed is reduced to 500 - 1000 revolutions per minute, and then component A is added. After the obtained mixture is further subjected to defoaming treatment, the mildew-removing gel composition that is not prone to water separation at high temperatures is obtained.

[0023] The mildew-removing gel composition that is not prone to water separation at high temperatures and its preparation method in the present invention provide a mildew-removing gel composition with sodium hypochlorite as the main component, an available chlorine content higher than 1% and not prone to water separation at high temperatures. It solves the problems of high-temperature stability (water separation at high temperatures, mildew-removing failure) and water separation of the gel in a strong oxidation system. The mildew-removing gel composition of the present invention is composed of pure inorganic components and does not contain surfactants. Lithium soapstone with a pH value range of 10 - 11 and subjected to iron removal treatment is used as a thickening agent to solve the problems that the strong oxidation system cannot maintain the gel state and thus cannot achieve the effect of deep mildew removal, and cannot maintain the effective active ingredients within the shelf life, resulting in mildew-removing failure, and the gel turns red or yellow during storage; at the same time, using porous materials such as sepiolite to solve the problem of water separation in gel storage.

[0024] The present invention prolongs the action time of the mildew-removing gel with the surface of the object where mildew grows through gel wall attachment, achieving the effect of deep mildew removal, such as the deep removal of mildew on the washing machine rubber ring, the edge of the toilet, bathroom glass glue, floor tile joints, the edge of the kitchen sink, the refrigerator sealing strip, the edge of the stove, the edge of the glass window, etc. Description of the Drawings

[0025] Figure 1 It is a comparison diagram of the use effects of the mildew-removing gel composition of the present invention in different application scenarios. Detailed Embodiments

[0026] In order to make the application, technical solutions and advantages of the present invention clearer and more understandable, the content of the present invention will be described in detail in combination with specific embodiments. It should be understood that the embodiments are only used to illustrate the present invention, rather than limiting the protection scope of the present invention. Any simple improvement to the preparation method of the present invention under the premise of the inventive concept belongs to the protection scope of the present invention.

[0027] Example 1 A Mildew Removing Gel Composition That Does Not Melt in Water at High Temperatures and Its Preparation Method

[0028] A mildew removing gel composition that does not melt in water at high temperatures, which comprises the following components by mass percentage:

[0029] Component A: 15 - 30% of sodium hypochlorite solution with a mass percentage concentration of 10%;

[0030] Component B: 1 - 10% of lithium saponite, 0.1 - 0.5% of porous material, 0.1 - 2.0% of alkali metal electrolyte, and deionized water is added to make up 100%;

[0031] The lithium saponite is lithium saponite that has been treated for iron removal, with a pH value range of 10 - 11 and an iron content not exceeding 3 ppm;

[0032] The porous material is sepiolite.

[0033] Preparation method of the mildew removing gel composition that does not melt in water at high temperatures:

[0034] Component B is dispersed at a high speed at a rotation speed of 1500 - 3000 revolutions per minute for 30 minutes. After the rotation speed is reduced to 500 - 1000 revolutions per minute, component A is added. The obtained mixture is then subjected to degassing treatment to obtain the mildew removing gel composition that does not melt in water at high temperatures.

[0035] Table 1 Raw Material Compositions of Example 1 and Comparative Examples 1 - 3 (mass percentage %)

[0036]

[0037] The performances such as pH, appearance, usability, and stability of Example 1 and Comparative Examples 1 - 3 were respectively tested. The specific results are shown in Table 2.

[0038] Table 2 Performance Comparison of Mildew Removing Gel Compositions with Different Parameter Lithium Saponites in Example 1 and Comparative Examples 1 - 3

[0039]

[0040] It can be seen from Table 2 that Example 1 has the best stability and does not suffer from water dissolution and discoloration at high temperatures, which is significantly better than Comparative Examples 1 and 2. Compared with Comparative Example 3, the use of sepiolite solves the problem of water separation in gel storage.

[0041] Example 2 A high temperature and non-water-resistant mildew removal gel composition and its preparation method

[0042] A high-temperature, non-water-resistant mildew-removing gel composition comprises the following components in percentage by mass:

[0043] Component A: 23% sodium hypochlorite solution with a mass percentage concentration of 10%;

[0044] Component B: 5% hectorite, 0.1% porous material, 0.5% alkali metal electrolyte, and deionized water to 100%;

[0045] The hectorite is a hectorite that has been treated with iron removal, has a pH value ranging from 10 to 11, and an iron content of no more than 3 ppm;

[0046] The porous material is sepiolite.

[0047] Preparation method of high temperature non-water-resistant mildew removal gel composition:

[0048] Component B is dispersed at a high speed of 1500-3000 rpm for 30 minutes, and then component A is added after the speed is reduced to 500-1000 rpm. The obtained mixture is then degassed to obtain the high-temperature non-water-resistant mildew removal gel composition.

[0049] Performance comparison tests were conducted on Example 2 and competitor products 1 and 2, respectively. The effective chlorine content of Example 2 and competitor product 2 was tested in accordance with the national standard GB 19106-2013 "Sodium hypochlorite", and the mildew removal effect of Example 2 was tested in accordance with the national standard GB / T 1741-2020 "Determination of mildew resistance of paint films".

[0050] Table 3 Performance comparison between Example 2 and commercially available mold removal gel composition competitors

[0051]

[0052]

[0053] It can be seen from Table 3 that Example 2 and Competitors 1 and 2 are basically the same in appearance and smell, but Example 2 is superior to the competitors in the following aspects. First, the pH of Example 2 is closer to neutral. Second, the effective chlorine content of Example 2 is higher than that of Competitor 2. Third, in terms of stability, Example 2 did not show any abnormalities during the stability test, and there was no water lysis phenomenon after being stored at 55°C for 14 days. Fourth, in terms of mildew removal effect, Example 2 still has mildew removal effect after hot storage, and can meet the mildew resistance level 0 requirements. Overall, the overall effect of Example 2 is better than that of the two competing products.

[0054] In Table 4, the attenuation rate of the effective chlorine content was tested for Example 2, Competitor 2, and 10% pure sodium hypochlorite solution. The effective chlorine content stored at 55°C for 7 days and 14 days was tested and compared with the initial value. The results showed that the attenuation rate of the 10% pure sodium hypochlorite solution at 55°C@14 days reached 55%, indicating that sodium hypochlorite still has instability problems. In the mildew removal gel system, the attenuation rate of the effective chlorine content decreased. The attenuation rates of Example 2 and Competitor 2 at 55°C@14 days were 49% and 54%, respectively, indicating that Example 2 can alleviate the attenuation of sodium hypochlorite in the system.

[0055] Table 4 Test on the decay rate of effective chlorine in mildew removal gel

[0056]

[0057] Example 3 Determination of the lower limit of effective chlorine content in mold removal gel

[0058] A high-temperature, non-water-resistant mildew-removing gel composition comprises the following components in percentage by mass:

[0059] Component A: 23% sodium hypochlorite solution with a mass percentage concentration of 10%;

[0060] Component B: 5% hectorite, 0.1% porous material, 0.5% alkali metal electrolyte, and deionized water to 100%;

[0061] The hectorite is a hectorite that has been treated with iron removal, has a pH value range of 10 to 11, and an iron content of no more than 3 ppm;

[0062] The porous material is sepiolite.

[0063] According to the national standard GB 19106-2013 "Sodium hypochlorite", the effective chlorine content of Example 3 and Comparative Examples 4 to 7 was tested, and the actual application test of the mildew removal effect was carried out.

[0064] The main difference between Example 3 and Comparative Examples 4 to 7 is the difference in effective content.

[0065] Table 5 Comparison of Mildew Removal Effects between Example 3 and Comparative Examples 4-7

[0066] Project Available chlorine content Mildew removal effect Example 3 0.34％ OK Comparative example 4 0.15％ Unable to completely remove mildew Comparative example 5 0.22％ Unable to completely remove mildew Comparative example 6 0.47％ OK Comparative example 7 0.81％ OK

[0067] As can be seen from Table 5, Example 3, Comparative Example 6, and Comparative Example 7 can achieve mildew removal effects, but Comparative Examples 4 and 5 cannot completely remove mildew, indicating that 0.34% is the lower limit of the available chlorine content for the mildew removal gel to meet the mildew removal effect.

[0068] 0.34% is the lower limit of the available chlorine content for the mildew removal gel to meet the mildew removal effect. Therefore, to maintain its deep mildew removal effect within the shelf life, it is necessary to ensure its initial available chlorine content and the decay rate of available chlorine, that is, its effective activity and stability, etc.

[0069] In summary, for the mildew removal gel composition that is not easily liquefied by high temperature and its preparation method of the present invention, lithium saponite treated by iron removal is used as a thickener to improve the stability of the gel state in the strong oxidation system; sepiolite is used to solve the problem of water separation during gel storage. The mildew removal gel prepared by the present invention has good stability and effective activity, and can maintain the deep mildew removal effect within the shelf life.

[0070] In summary, the above are only the preferred examples of the present invention, and do not impose any form of limitation on the present invention; any equivalent changes, such as slight modifications and evolutions made by those skilled in the art without departing from the technical solution of the present invention using the disclosed technical content, are regarded as equivalent examples of the present invention; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments according to the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

[0071] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered that it is within the scope described in this specification.

[0072] The experimental methods without specific conditions mentioned in the present invention usually follow conventional conditions or the conditions recommended by the manufacturer.

[0073] For the various optimized technical solutions of the present invention, unless otherwise stated, the various optimized technical solutions can be combined with each other.

[0074] Unless otherwise stated, the percentages and parts are weight percentages and weight parts.

[0075] The experimental methods without specific conditions mentioned in the specification and the embodiments usually follow conventional conditions or the conditions recommended by the manufacturer.

[0076] Unless otherwise defined, all professional and scientific terms used herein have the same meaning as those familiar to persons skilled in the art. In addition, any methods and materials similar or equivalent to the described content can be applied to the method of the present invention.

Claims

1. A mildew-removing gel composition that does not easily turn into water at high temperatures, characterized in that: it comprises the following components by mass percentage: Component A: 15-30% of a sodium hypochlorite solution with a mass percentage concentration of 10%; Component B: 1-10% of hectorite, 0.1-0.5% of porous material, 0.1-2.0% of alkali metal electrolyte, and deionized water is added to make up 100%; The hectorite is hectorite that has undergone iron removal treatment, with a pH value in the range of 10-11 and an iron content not exceeding 3 ppm.

2. The mildew-removing gel composition that does not easily turn into water at high temperatures according to claim 1, characterized in that: the porous material is sepiolite.

3. The mildew-removing gel composition that does not easily turn into water at high temperatures according to claim 1, characterized in that: the alkali metal electrolyte is a combination of one or more of sodium chloride, sodium carbonate, and sodium hydroxide.

4. A preparation method of a mildew-removing gel composition that does not easily turn into water at high temperatures, characterized in that: it comprises the following preparation steps: Component B is highly dispersed at a rotation speed of 1500-3000 revolutions per minute for 30 minutes, the rotation speed is lowered to 500-1000 revolutions per minute, and then Component A is added. After the obtained mixture is defoamed, the mildew-removing gel composition that does not easily turn into water at high temperatures is obtained.

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