A modified silica sol inorganic resin, its preparation method and application

Abstract

The application belongs to the technical field of interior wall coating, and discloses a modified silica sol inorganic resin, a preparation method and application thereof; the preparation method comprises the following steps: obtaining the dosage of silane coupling agent, and obtaining the dosage of inorganic alkali or organic alkali according to a preset ratio; according to the obtained dosage of silane coupling agent and the dosage of inorganic alkali or organic alkali, a hydrolysis stabilizer is prepared; the alkali content of the hydrolysis stabilizer is measured, the hydrolysis stabilizer is weighed and added into silica sol, stirring and heat preservation are carried out at a temperature of 70-75 DEG C, and a modified silica sol inorganic resin is obtained; wherein, the hydrolysis stabilizer is weighed according to a ratio, and the modulus of the modified silica sol inorganic resin is controlled to be 15-50. The modified silica sol inorganic resin is prepared based on strong alkaline modification; as an inorganic film-forming material, the modified silica sol inorganic resin can keep the scrub resistance of the coating by being matched with additives, powders and the like in the coating.

Description

Technical Field

[0001] This invention belongs to the field of interior wall coating technology, and specifically relates to a modified silica sol inorganic resin, its preparation method, and its application. Background Technology

[0002] In existing technologies, inorganic interior wall coatings are typically coatings that use silica sol or silicates alone or in combination as film-forming agents. They are characterized by low VOC (volatile organic compound) emissions, high air permeability, and high fire resistance, and are widely used in public places such as hospitals and schools.

[0003] However, silica sol and silicates, as film-forming materials for inorganic interior wall coatings, suffer from a significant decrease in scrub resistance after thermal storage, limiting their further application and enhancing their value. Therefore, a new modified inorganic film-forming material is urgently needed to improve scrub resistance. Summary of the Invention

[0004] The purpose of this invention is to provide a modified silica sol inorganic resin, its preparation method, and its application, to solve one or more of the aforementioned technical problems. In the technical solution provided by this invention, a modified silica sol inorganic resin is prepared based on strong alkalinity modification; as an inorganic film-forming agent, it can maintain the high scrub resistance of coatings when combined with additives, powders, etc.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this invention provides a method for preparing a modified silica sol inorganic resin, comprising the following steps:

[0007] Step 1: Obtain the amount of silane coupling agent and calculate the amount of Si-OH generated by the hydrolysis of the silane coupling agent based on the relative molecular mass of the silane coupling agent; based on the calculated amount of Si-OH and the amount of the selected inorganic or organic base, obtain the amount of inorganic or organic base according to a preset ratio.

[0008] Step 2: Prepare a hydrolysis stabilizer based on the amount of silane coupling agent and inorganic or organic base obtained in Step 1.

[0009] Step 3: Measure the alkali content of the hydrolytic stabilizer prepared in Step 2, weigh the hydrolytic stabilizer and add it to the silica sol, stir and keep warm at 70℃~75℃ to obtain modified silica sol inorganic resin; wherein, the hydrolytic stabilizer is weighed according to the proportion, and the modulus of the modified silica sol inorganic resin is controlled between 15 and 50.

[0010] A further improvement to the preparation method of the present invention is that, in step 1,

[0011] The preset ratio is that the amount of Si-OH in the silane coupling agent is (1-2):1.5 to the molar ratio of the selected inorganic or organic base.

[0012] A further improvement to the preparation method of the present invention is that, in step 1,

[0013] The silane coupling agent is one or more of methyltrimethoxysilane, methyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-(methacryloyloxy)propyltrimethoxysilane and vinyltrimethoxysilane;

[0014] The inorganic base is one or more of ammonia, potassium hydroxide, sodium hydroxide, and lithium hydroxide;

[0015] The organic base is one or more selected from triethanolamine, N,N,N,N-pentamethyldivinyltriamine and N,N,N,N-tetramethyl-1,6-hexanediamine.

[0016] A further improvement of the preparation method of the present invention is that, in step 2, the alkali content in the hydrolysis stabilizer is 5% to 30% by mass percentage.

[0017] A further improvement to the preparation method of the present invention is that, in step 3,

[0018] When measuring the alkali content of the hydrolyzed stabilizer prepared in step 2, the alkali content is determined by chemical titration.

[0019] The chemical titration method and the modulus calculation method are both in accordance with the industry standard HG / T 4131-2010.

[0020] In a second aspect, the present invention provides a modified silica sol inorganic resin prepared by the preparation method described in any one of the first aspects of the present invention.

[0021] In a third aspect, the present invention provides an application of the modified silica sol inorganic resin described in the second aspect of the present invention, wherein the modified silica sol inorganic resin is used to prepare inorganic resin coatings.

[0022] A further improvement to this invention is that the steps for preparing the inorganic resin coating include:

[0023] First, cellulose is dissolved in water, and additives and powders are added sequentially while stirring; then, styrene-acrylic emulsion and the modified silica sol inorganic resin are added; finally, film-forming aids are added to obtain an inorganic resin coating.

[0024] Of which, by mass percentage, modified silica sol inorganic resin is 15%–25%, styrene-acrylic emulsion is 5%–7%, cellulose is 0.4%–0.6%, additives are 0.5%–1.0%, powder is 40%–50%, and the remainder is water.

[0025] A further improvement to the application of this invention is that,

[0026] The water is deionized water;

[0027] The cellulose is hydroxyethyl cellulose;

[0028] The additives consist of defoamers, rheology modifiers, and dispersants; or, the additives consist of defoamers, wetting agents, dispersants, and film-forming aids.

[0029] The powder includes one or more of kaolin, titanium dioxide, and heavy calcium carbonate.

[0030] A further improvement of the present invention is that the modified silica sol inorganic resin has a solid content of 30% to 35% by mass and a pH value of 9 to 11.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The technical solution provided by this invention involves preparing a modified silica sol inorganic resin based on strong alkalinity modification. As an inorganic film-forming material, it can maintain the high scrub resistance of the coating when combined with additives and powders in the coating. Specifically, when silica sol solution exists alone in the coating as a film-forming substance of inorganic salt coatings, it easily reacts with the polyvalent metal ions contained in the heavy calcium carbonate in the coating powder, causing the coating to gel. Silane coupling agents can couple with the Si-OH groups in the silica sol through hydrolysis, forming Si-O-Si bonds, thereby maintaining the stability of the silica sol. However, this stabilization method easily consumes a large amount of silanol groups in the silica sol as the amount of silane coupling agent increases. Although the thermal stability of the coating is maintained, the scrub resistance of the coating will decrease significantly after thermal storage. In view of this, the technical solution of the present invention introduces an inorganic or organic base. During the bonding process, the strong alkalinity of the inorganic or organic base is used to continuously decompose the silica sol, generating a large number of silanol groups to maintain the consumption of Si-OH during the thermal storage of the coating, thereby maintaining the high scrub resistance of the coating. At the same time, the inorganic or organic base can also use its strong alkalinity to promote the hydrolysis of the three Si-OR (R=-CH3,-CH2CH3) bonds in the silane coupling agent as much as possible during the hydrolysis process of the silane coupling agent, generating a large number of Si-OH under the same dosage to maintain the stability of the silica sol. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; obviously, the drawings described below are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0034] Figure 1 This is a schematic flowchart of the preparation method of modified silica sol inorganic resin in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram illustrating the mechanism of the preparation method of modified silica sol inorganic resin in an embodiment of the present invention. Detailed Implementation

[0036] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0037] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0038] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0039] Furthermore, it should be understood that the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, does not preclude the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, unless otherwise stated. It should also be understood that the combined connection relationship between one or more devices / apparatus mentioned in this invention does not preclude the existence of other devices / apparatus before or after the combined devices / apparatus, or the insertion of other devices / apparatus between these explicitly mentioned devices / apparatus, unless otherwise stated. Moreover, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not for limiting the order of the method steps or limiting the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0040] Please see Figure 1 and Figure 2 The present invention provides a method for preparing a modified silica sol inorganic resin, which specifically includes the following steps:

[0041] Step 1: Obtain the amount of silane coupling agent and calculate the amount of Si-OH generated by the hydrolysis of the silane coupling agent based on the relative molecular mass of the silane coupling agent; based on the calculated amount of Si-OH and the amount of the selected inorganic or organic base, obtain the amount of inorganic or organic base according to a preset ratio.

[0042] In a further preferred embodiment of the present invention, the molar ratio of the number of Si-OH groups in the silane coupling agent to the selected inorganic or organic base is (1-2):1.5; furthermore, the silane coupling agent is one or more of methyltrimethoxysilane, methyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-(methacryloyloxy)propyltrimethoxysilane, and vinyltrimethoxysilane; the inorganic base is one or more of ammonia, potassium hydroxide, sodium hydroxide, and lithium hydroxide; the organic base is one or more of triethanolamine, N,N,N,N-pentamethyldivinyltriamine, and N,N,N,N-tetramethyl-1,6-hexanediamine.

[0043] Step 2: Prepare a hydrolysis stabilizer according to the amount of silane coupling agent and the amount of inorganic or organic base.

[0044] In a specific and exemplary embodiment of the present invention, firstly, based on the amount of silane coupling agent, deionized water and silane coupling agent are magnetically stirred at a stirring rate of 1500 r / min to prepare a solution; then, an inorganic or organic base is weighed according to the dosage and slowly added dropwise to the solution, and the mixed solution is stirred under vortex conditions to obtain a high-alkali content hydrolysis stabilizer; in a further preferred embodiment, the alkali content (calculated as K2O) in the hydrolysis stabilizer is 5% to 30% by mass percentage.

[0045] Step 3: Measure the alkali content of the hydrolyzed stabilizer, weigh the hydrolyzed stabilizer and add it to the silica sol. Stir and maintain the temperature at 70℃~75℃ to obtain a modified silica sol inorganic resin. The modulus of the modified silica sol inorganic resin is controlled between 15 and 50, and the hydrolyzed stabilizer is weighed proportionally. More preferably, the modulus can be controlled between 20 and 40. Optionally, stirring can be performed at 1500 r / min for 30 min. Further explanation: The alkali content of the hydrolyzed stabilizer can be determined by chemical titration. When determining the alkali content by chemical titration, the industry standard HG / T 4131-2010 for industrial potassium silicate can be referenced; the modulus calculation can also refer to the industry standard HG / T4131-2010 for industrial potassium silicate.

[0046] In the technical solution provided by the embodiments of the present invention, a modified silica sol inorganic resin is prepared based on strong alkalinity modification. As an inorganic film-forming material, it can maintain the scrub resistance of the coating when combined with additives, powders and other materials in the coating.

[0047] In this embodiment of the invention, the application of the modified silica sol inorganic resin in the preparation of inorganic resin coatings includes the following steps:

[0048] First, dissolve cellulose in water at 300 r / min. Then, add defoamer, wetting agent, dispersant, kaolin, titanium dioxide and heavy calcium carbonate in sequence. Increase the stirring speed to 1200 r / min and stir for 30 min. Add styrene-acrylic emulsion and the modified silica sol inorganic resin prepared in the above embodiment of the present invention. Finally, add film-forming aid to obtain a high scrub-resistant inorganic resin coating.

[0049] Of which, by mass percentage, silica sol inorganic resin is 15%–25%, styrene-acrylic emulsion is 5%–7%, cellulose is 0.4%–0.6%, additives are 0.5%–1.0%, powder is 40%–50%, and the remainder is water.

[0050] In the application of this invention, the silica sol inorganic resin solid content is 30%–35% by mass, and the pH value is 9–11. Alternatively, the additives may consist of defoamers, rheology modifiers, and dispersants; or, the additives may consist of defoamers, wetting agents, dispersants, and film-forming aids. More specifically, the defoamer may be a polysiloxane-based defoamer; the wetting agent may be a nonionic fatty alcohol polyoxyethylene ether; the dispersant may be a hydrophobically modified carboxylic acid copolymer; and the film-forming aid may be a dodecyl alcohol ester. More specifically, the styrene-acrylic emulsion is a hard emulsion, the powders are commercially available kaolin, titanium dioxide, and heavy calcium carbonate, and the cellulose is hydroxyethyl cellulose.

[0051] In this embodiment of the invention, the testing process for preparing the product includes the following steps:

[0052] Test standard: GB / T9266-2009 "Determination of Scrub Resistance of Architectural Coatings";

[0053] Instruments and equipment: Paint wash resistance tester;

[0054] Paint preparation: Stir the prepared paint thoroughly to remove all air bubbles and particles to prevent the formation of bubbles or pores in the paint film;

[0055] Test plate preparation: Take two calcium silicate boards with dimensions of 45cm×15cm×0.8cm. Pour the sample to be tested evenly on the top of the board. Use a 120-micron wire rod to quickly spread the coating evenly over the entire test board. Let the prepared test board cool at 23±2℃ for 24 hours. Take the same sample to be tested and pour it evenly on the top of the cooled test board. Use an 80-micron wire rod to quickly spread the coating evenly over the entire test board. Let it cool at 23±2℃ for 7 to 21 days.

[0056] Curing conditions: Place the test plates in an environment with a temperature of 23℃±2℃ and a relative humidity of 45%~55% for 7 days to dry;

[0057] Soaking the bristles: Before use, immerse 12mm of the bristles in water at 23±2℃ for 30 minutes, then remove and soak the bristles in the prepared laundry detergent solution for 20 minutes.

[0058] Experimental procedure: The cured test sample was fixed horizontally on the test platform of the scrub resistance tester with the painted side facing up. A brush was placed on the plate, and the prepared laundry detergent was added to keep the scrub surface moist. The power was turned on and the calculator was used to count.

[0059] End of experiment: The substrate was exposed, the experiment was completed, and the recorded experimental data are shown in Table 1;

[0060] Table 1. Experimental Data

[0061] Modulus Silica sol: hydrolysis stabilizer 7-day thermal storage viscosity (KU) Initial abrasion resistance 7-day heat storage and abrasion resistance 10 100：31 15 10000 / 10000 8000 / 8000 15 100：20 5 10000 / 10000 7000 / 7000 20 100：14 5 10000 / 10000 6000 / 5500 25 100：11 4 10000 / 10000 3000 / 3000 30 100：8.6 4 10000 / 10000 3500 / 3500 35 100：7 4.5 8000 / 8000 4000 / 4000 40 100：5.8 11 8000 / 8000 3500 / 4000 45 100：4.8 9 8000 / 8500 3000 / 3500 50 100：4 11 8000 / 9000 2000 / 2000 55 100：3.4 8 8000 / 8000 1000 / 1000 60 100：2.9 5 8000 / 8000 800 / 600

[0062] Data analysis: At high modulus (50-60), due to the small amount of hydrolytic stabilizer and low alkali content, the silica sol is not decomposed enough, resulting in a low silanol content and thus low scrub resistance after heat storage. At a modulus of 15, the scrub resistance of the coating after heat storage is the highest, mainly because the alkali content in this range is sufficient to decompose the silica sol and generate a large number of silanols to maintain the scrub resistance of the coating after heat storage. At a modulus of 10, due to the excessive alkali content, a large number of silanols are generated. Although the scrub resistance is improved after heat storage, the heat storage stability of the coating does not meet the requirements.

[0063] Example 1

[0064] This invention provides a method for preparing a modified silica sol inorganic resin, comprising the following steps:

[0065] Step 1: Obtain the amount of silane coupling agent and calculate the amount of Si-OH generated by the hydrolysis of the silane coupling agent based on the relative molecular mass of the silane coupling agent; based on the calculated amount of Si-OH and the amount of the selected inorganic or organic base, obtain the amount of inorganic or organic base according to a preset ratio.

[0066] Step 2: Prepare a hydrolysis stabilizer based on the amount of silane coupling agent and inorganic or organic base obtained in Step 1.

[0067] Step 3: Measure the alkali content of the hydrolysis stabilizer prepared in Step 2, weigh the hydrolysis stabilizer and add it to the silica sol, stir and keep warm at 70°C to obtain the modified silica sol inorganic resin; wherein, the hydrolysis stabilizer is weighed according to the proportion, and the modulus of the modified silica sol inorganic resin is controlled at 15.

[0068] in,

[0069] In step 1, the preset ratio is that the molar ratio of the number of Si-OH groups in the silane coupling agent to the inorganic base is 1:1.5; the silane coupling agent is methyltrimethoxysilane; and the inorganic base is ammonia.

[0070] In step 2, the alkali content in the hydrolysis stabilizer is 5% to 30% by mass percentage;

[0071] In step 3, when measuring the alkali content of the hydrolyzed stabilizer prepared in step 2, the alkali content is determined by chemical titration; wherein the chemical titration method and the modulus calculation method are both in accordance with the industry standard HG / T 4131-2010.

[0072] Example 2

[0073] The difference between this embodiment and Embodiment 1 lies only in that, in step 1, the preset ratio is a 1:1 molar ratio of the number of Si-OH groups in the silane coupling agent to the inorganic base; the silane coupling agent is methyltrimethoxysilane, methyltriethoxysilane, and 3-aminopropyltriethoxysilane; the inorganic base is ammonia and potassium hydroxide; in step 3, the modified silica sol inorganic resin is obtained by stirring and maintaining the temperature at 73°C; wherein, a hydrolysis stabilizer is weighed according to a certain ratio to control the modulus of the modified silica sol inorganic resin to 20.

[0074] Example 3

[0075] The difference between this embodiment and Embodiment 1 lies only in that, in step 1, the preset ratio is a molar ratio of the number of Si-OH groups in the silane coupling agent to the inorganic base of 2:1.5; the silane coupling agent is 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-(methacryloyloxy)propyltrimethoxysilane, and vinyltrimethoxysilane; the inorganic base is ammonia, potassium hydroxide, sodium hydroxide, and lithium hydroxide; in step 3, the modified silica sol inorganic resin is obtained by stirring and maintaining the temperature at 75°C; wherein, a hydrolysis stabilizer is weighed according to a certain ratio to control the modulus of the modified silica sol inorganic resin to 30.

[0076] Example 4

[0077] The difference between this embodiment and Embodiment 1 is only that, in step 1, the preset ratio is a molar ratio of the number of Si-OH groups in the silane coupling agent to the organic base of 1:1.5; the silane coupling agent is 3-(methacryloyloxy)propyltrimethoxysilane; and the organic base is triethanolamine; in step 3, the modified silica sol inorganic resin is obtained by stirring and maintaining the temperature at 74°C; wherein, a hydrolytic stabilizer is weighed according to a certain ratio to control the modulus of the modified silica sol inorganic resin at 40.

[0078] Example 5

[0079] The difference between this embodiment and Embodiment 1 lies only in that, in step 1, the preset ratio is a 1:1 molar ratio of the number of Si-OH groups in the silane coupling agent to the organic base; the silane coupling agent is methyltriethoxysilane and 3-(methacryloyloxy)propyltrimethoxysilane; the organic base is triethanolamine and N,N,N,N-pentamethyldivinyltriamine; in step 3, the modified silica sol inorganic resin is obtained by stirring and maintaining the temperature at 75°C; wherein, a hydrolytic stabilizer is weighed according to a certain ratio to control the modulus of the modified silica sol inorganic resin to 50.

[0080] Example 6

[0081] The difference between this embodiment and Embodiment 1 lies only in that, in step 1, the preset ratio is a molar ratio of the number of Si-OH groups in the silane coupling agent to the organic base of 2:1.5; the silane coupling agent is methyltriethoxysilane and 3-(methacryloyloxy)propyltrimethoxysilane; the organic base is triethanolamine, N,N,N,N-pentamethyldivinyltriamine and N,N,N,N-tetramethyl-1,6-hexanediamine; in step 3, the modified silica sol inorganic resin is obtained by stirring and maintaining the temperature at 70°C; wherein, a hydrolytic stabilizer is weighed according to a certain ratio to control the modulus of the modified silica sol inorganic resin to 50.

[0082] Example 7

[0083] The present invention provides an application of a modified silica sol inorganic resin for preparing inorganic resin coatings, comprising the following steps:

[0084] First, cellulose is dissolved in water, and additives and powders are added sequentially while stirring; then, styrene-acrylic emulsion and the modified silica sol inorganic resin are added; finally, film-forming aids are added to obtain an inorganic resin coating.

[0085] Of which, by mass percentage, modified silica sol inorganic resin is 15%, styrene-acrylic emulsion is 5%, cellulose is 0.4%, additives are 0.5%, powder is 40%, and the remainder is water;

[0086] The water is deionized water; the cellulose is hydroxyethyl cellulose; the additives consist of defoamer, rheology modifier and dispersant; the powder includes kaolin, titanium dioxide and heavy calcium carbonate; the modified silica sol inorganic resin has a solid content of 30% by mass and a pH value of 9.

[0087] Example 8

[0088] The present invention provides an application of a modified silica sol inorganic resin for preparing inorganic resin coatings, comprising the following steps:

[0089] First, cellulose is dissolved in water, and additives and powders are added sequentially while stirring; then, styrene-acrylic emulsion and the modified silica sol inorganic resin are added; finally, film-forming aids are added to obtain an inorganic resin coating.

[0090] Of which, by mass percentage, modified silica sol inorganic resin accounts for 20%, styrene-acrylic emulsion accounts for 6%, cellulose accounts for 0.5%, additives account for 0.7%, powder accounts for 45%, and the remainder is water;

[0091] The water is deionized water; the cellulose is hydroxyethyl cellulose; the additives consist of defoamer, wetting agent, dispersant and film-forming agent; the powder includes kaolin and titanium dioxide; the modified silica sol inorganic resin has a solid content of 33% by mass and a pH value of 10.

[0092] Example 9

[0093] The present invention provides an application of a modified silica sol inorganic resin for preparing inorganic resin coatings, comprising the following steps:

[0094] First, cellulose is dissolved in water, and additives and powders are added sequentially while stirring; then, styrene-acrylic emulsion and the modified silica sol inorganic resin are added; finally, film-forming aids are added to obtain an inorganic resin coating.

[0095] Of which, by mass percentage, modified silica sol inorganic resin accounts for 25%, styrene-acrylic emulsion accounts for 7%, cellulose accounts for 0.6%, additives account for 1.0%, powder accounts for 50%, and the remainder is water;

[0096] The water is deionized water; the cellulose is hydroxyethyl cellulose; the additives consist of defoamer, wetting agent, dispersant and film-forming agent; the powder includes kaolin; the modified silica sol inorganic resin has a solid content of 35% by mass and a pH value of 11.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing inorganic resin coatings, characterized in that, Includes the following steps: First, cellulose is dissolved in water, and additives and powder are added sequentially while stirring. Then, styrene-acrylic emulsion and modified silica sol inorganic resin are added. Finally, film-forming aids are added to obtain an inorganic resin coating. The modified silica sol inorganic resin comprises 15%–25% by mass, the styrene-acrylic emulsion comprises 5%–7%, the cellulose comprises 0.4%–0.6%, the additives comprises 0.5%–1.0%, the powder comprises 40%–50%, and the remainder is water. The modified silica sol inorganic resin has a solid content of 30%–35% by mass and a pH value of 9–11. The water is deionized water. The cellulose is hydroxyethyl cellulose. The additives consist of defoamers, rheology modifiers, and dispersants; or, the additives consist of defoamers, wetting agents, dispersants, and film-forming aids. The powder includes one or more of kaolin, titanium dioxide, and heavy calcium carbonate. The preparation method of modified silica sol inorganic resin includes the following steps: Step 1: Obtain the amount of silane coupling agent and calculate the amount of Si-OH produced by the hydrolysis of the silane coupling agent based on its relative molecular mass. Based on the calculated amount of Si-OH and the amount of the selected inorganic or organic base, obtain the amount of the inorganic or organic base according to a preset ratio. Step 2: Prepare a hydrolysis stabilizer according to the amount of silane coupling agent and inorganic or organic base obtained in Step 1. Step 3: Measure the alkali content of the hydrolysis stabilizer prepared in Step 2, weigh the hydrolysis stabilizer and add it to the silica sol. Stir and maintain the temperature at 70℃~75℃ to obtain a modified silica sol inorganic resin. The hydrolysis stabilizer is weighed according to a ratio, and the modulus of the modified silica sol inorganic resin is controlled between 15 and 50. In step 1, the preset ratio is (1-2):1.5, where the amount of Si-OH in the silane coupling agent is (1-2):1.

5. In step 1, the silane coupling agent is one or more of methyltrimethoxysilane, methyltriethoxysilane, 3-aminopropyltriethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 3-(methacryloyloxy)propyltrimethoxysilane, and vinyltrimethoxysilane. The inorganic base is one or more of ammonia, potassium hydroxide, sodium hydroxide, and lithium hydroxide. The organic base is one or more of triethanolamine, N,N,N′,N″,N″-pentamethyldiethylenetriamine, and N,N,N',N'-tetramethyl-1,6-hexanediamine.

2. The method for preparing inorganic resin coatings according to claim 1, characterized in that, In step 3, the alkali content in the hydrolysis stabilizer is 5% to 30% by mass percentage.

3. The method for preparing inorganic resin coatings according to claim 1, characterized in that, In step 3, when measuring the alkali content of the hydrolyzed stabilizer prepared in step 2, the alkali content is determined by chemical titration; wherein the chemical titration method and the modulus calculation method are both in accordance with the industry standard HG / T 4131-2010.

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