A high-strength and highly wear-resistant two-component fireproof floor coating and its preparation method

Abstract

This application relates to the technical field of two-component fireproof floor coatings, and specifically discloses a high-strength and high-wear-resistant two-component fireproof floor coating and a preparation method thereof. The two-component fireproof floor coating is made from a powder mixture and a liquid mixture; the powder mixture includes the following raw materials: portland cement, dolomite powder, modified nano-silica, magnesium aluminum silicate powder, flame retardant, cellulose ether, starch ether, water reducer, defoamer, and retarder; the liquid mixture includes the following raw materials: waterborne acrylic polymer emulsion, 1,3,5-benzenetricarbohydrazide, leveling agent, film-forming aid, preservative, and mildew-proof agent; the modified nano-silica is obtained by graft polymerization of nano-silica with tetraethoxydivinyldisiloxane and diacetone acrylamide. This two-component fireproof floor coating, through the mutual cooperation of the powder mixture and the liquid mixture, exhibits the advantages of high strength, high adhesion, high wear resistance, good fluidity, and high fireproof performance, and can meet the requirements of higher demands.

Description

Technical Field

[0001] This application relates to the technical field of two-component fireproof floor coatings. More specifically, it relates to a high-strength and high-wear-resistant two-component fireproof floor coating and its preparation method. Background Art

[0002] Floor coatings are a type of decorative material, mainly used in underground parking lots, factory workshops, storage workshops, etc. Currently, the floor coatings used in the market are generally epoxy resin floor coatings, cement mortar self-leveling materials, and two-component fireproof floor coatings. Epoxy resin floor coatings have poor bearing strength and compressive strength; cement mortar self-leveling materials are prone to cracking and sanding, and have poor wear resistance; two-component fireproof floor coatings are made of powder mixtures and liquid mixtures, and have the advantages of relatively high compressive and flexural strengths, being delicate, not sanding, not cracking, fireproof, soundproof, having a certain heat preservation effect, and good wear resistance, and have received extensive attention and application.

[0003] In the prior art two-component fireproof floor coatings, the powder mixture is generally cement, sand, flame retardant, and additive aids; the liquid mixture generally includes polymer resin emulsion and additive aids. However, the applicant found in actual processing that the 28d compressive strength of the two-component fireproof floor coating is about 35MPa, and the wear rate is about 360mm 3 , and the compressive strength and wear resistance are limited, unable to meet the requirements of higher demands, that is, the compressive strength and wear resistance need to be further improved. Summary of the Invention

[0004] In order to improve the compressive strength and wear resistance of two-component fireproof floor coatings, this application provides a high-strength and high-wear-resistant two-component fireproof floor coating and its preparation method.

[0005] In the first aspect, this application provides a high-strength and high-wear-resistant two-component fireproof floor coating, adopting the following technical scheme:

[0006] A high-strength and high-wear-resistant two-component fireproof floor coating is made of a powder mixture and a liquid mixture, and the weight ratio of the powder mixture to the liquid mixture is 10:(3 - 5);

[0007] The powder mixture is mainly made of the following raw materials in parts by weight: 50 - 60 parts of portland cement, 80 - 90 parts of dolomite powder, 13 - 18 parts of modified nano-silica, 5 - 15 parts of magnesium aluminum silicate powder, 10 - 15 parts of flame retardant, 4 - 6 parts of cellulose ether, 1 - 3 parts of starch ether, 2 - 4 parts of water reducing agent, 0.5 - 1.5 parts of defoaming agent, 0.5 - 1.5 parts of retarder;

[0008] The liquid mixture is mainly made of the following raw materials in parts by weight: 50-60 parts of aqueous acrylic polymer emulsion, 6-8 parts of 1,3,5-benzenetricarbohydrazide, 2-4 parts of leveling agent, 2-4 parts of film-forming aid, 0.5-1.5 parts of preservative, and 0.5-1.5 parts of mildew preventive;

[0009] The modified nano-silica is obtained by graft polymerization of nano-silica with tetraethoxydivinyldisiloxane and diacetone acrylamide.

[0010] The two-component fireproof floor coating of the present application forms a three-dimensional network structure through the mutual cooperation of the powder mixture and the liquid mixture, effectively increasing the bonding strength of the raw materials, so that the 28-day compressive strength > 42 MPa, the 28-day flexural strength > 11 MPa, the tensile bond strength ≥ 1.8 MPa, and the wear amount < 240 mm 3 , the fluidity at 20 min > 140 mm, and the fire protection grade is A. It significantly improves the compressive strength and wear resistance, and shows the advantages of high strength, high adhesiveness, high wear resistance, good fluidity, and high fire protection, and can meet the requirements of higher demands.

[0011] In the raw materials of the powder mixture, dolomite powder and flame retardant are added to keep excellent fire protection. Moreover, magnesium aluminum silicate powder is also added to the raw materials. The magnesium aluminum silicate powder has good adhesiveness and effectively increases the bonding strength of the raw materials. At the same time, nano-silica is also added to the raw materials. It can fill the pores and also enhance the bonding strength. Further, it is modified with tetraethoxydivinyldisiloxane and diacetone acrylamide, and siloxanyl, amide group, and ketone carbonyl are introduced on the surface of the nano-silica, greatly increasing the surface active groups of the nano-silica and enhancing the use effect of the modified nano-silica. In the present application, through the mutual cooperation between the modified nano-silica and the magnesium aluminum silicate powder, the compressive strength, flexural strength, tensile bond strength, and wear resistance of the two-component fireproof floor coating are improved.

[0012] At the same time, 1,3,5-benzenetricarbohydrazide is also added to the raw materials of the liquid mixture of the two-component fireproof floor coating of the present application. It contains a benzene ring and enhances the high-temperature resistance. It also contains three hydrazide groups, and the hydrazide groups can react with the ketone carbonyl on the surface of the modified nano-silica to crosslink, further enhancing the bonding strength between the raw materials, improving the interaction between the modified nano-silica and the magnesium aluminum silicate powder, and making the two-component fireproof floor coating show better comprehensive performance.

[0013] Optionally, the modified nano-silica is prepared by the following method: Mix tetraethoxydivinyldisiloxane in water, then add nano-silica, stir for 1-3 h, then add diacetone acrylamide and persulfate, stir for 2-4 h, filter to discard the filtrate, wash, and dry to obtain the modified nano-silica.

[0014] Optionally, the weight ratio of the nano-silica, tetraethoxydivinyldisiloxane, diacetone acrylamide, and persulfate is 10:(2-4):(1-3):(0.04-0.08).

[0015] By adopting the above technical solution, first, tetraethoxydivinyldisiloxane is grafted onto the surface of nano-silica, and then diacetone acrylamide and persulfate are added. Tetraethoxydivinyldisiloxane contains carbon-carbon double bonds and siloxane groups; diacetone acrylamide contains carbon-carbon double bonds, amide groups, and ketone carbonyl groups. Under the action of persulfate, they undergo a polymerization reaction on the surface of nano-silica, and siloxane groups, amide groups, and ketone carbonyl active groups are introduced onto the surface of nano-silica, increasing the bonding strength between the modified nano-silica and the raw materials, improving the strength, adhesion, and abrasion resistance of the two-component fireproof floor coating, and making the two-component fireproof floor coating exhibit better performance.

[0016] Optionally, the persulfate is one or more of sodium persulfate, potassium persulfate, and ammonium persulfate.

[0017] By adopting the above technical solution, sodium persulfate, potassium persulfate, and ammonium persulfate all have good initiation effects, and enable tetraethoxydivinyldisiloxane and diacetone acrylamide to undergo a polymerization reaction on the surface of nano-silica, and the raw materials are rich in sources and easy to obtain.

[0018] Further, in the preparation method of the modified nano-silica, the weight ratio of nano-silica to water is 1:(5-15). Preferably, the weight ratio of nano-silica to water is 1:(8-12). More preferably, the weight ratio of nano-silica to water is 1:10. In multiple embodiments, the weight ratio of nano-silica to water is 1:10, and it can also be set to 1:5, 1:8, 1:12, 1:15, etc. according to needs.

[0019] Optionally, the average particle size of the nano-silica is 80-120nm; the average particle size of the magnesium aluminum silicate powder is 1-5μm.

[0020] By adopting the above technical solution, the particle size of the nano-silica is optimized, and then the particle size of the modified nano-silica is optimized, improving the use effect of the modified nano-silica. Moreover, the particle size of the magnesium aluminum silicate powder is also optimized, enhancing the interaction between the modified nano-silica and the magnesium aluminum silicate powder, and making the two-component fireproof floor coating exhibit better performance.

[0021] In multiple embodiments, the average particle size of the nano-silica is 100 nm, and the average particle size can also be set to 80 mm, 90 mm, 110 mm, 120 mm, etc. according to needs. In multiple embodiments, the average particle size of the aluminum magnesium silicate powder is 2 μm, and the average particle size can also be set to 1 μm, 3 μm, 4 μm, 5 μm, etc. according to needs.

[0022] Optionally, the aqueous acrylic polymer emulsion is a LEAC acrylic polymer emulsion.

[0023] Optionally, the flame retardant is one or more of aluminum hydroxide, magnesium hydroxide, and ammonium polyphosphate.

[0024] By adopting the above technical solutions, the aqueous acrylic polymer emulsion and the flame retardant are optimized, which facilitates the selection of the aqueous acrylic polymer emulsion and the flame retardant, and the raw materials are rich in sources and easy to obtain.

[0025] Optionally, the water reducing agent is a polycarboxylate water reducing agent;

[0026] The defoaming agent is one or more of defoaming agent AGITAN-P823, defoaming agent NXZ, and defoaming agent BAPE;

[0027] The setting retarder is one or more of sodium gluconate, sodium citrate, and sodium lignosulfonate.

[0028] By adopting the above technical solutions, the water reducing agent, the defoaming agent, and the setting retarder are optimized, which facilitates the selection of the water reducing agent, the defoaming agent, and the setting retarder, and the raw materials are rich in sources and easy to obtain.

[0029] Furthermore, the polycarboxylate water reducing agent is polycarboxylate water reducing agent AN4000.

[0030] Optionally, the leveling agent is one or more of leveling agent BYK-348, leveling agent EFKA-3230, and leveling agent CASTLE-3410;

[0031] The film-forming aid is one or more of dodecyl alcohol ester, propylene glycol monoethyl ether, and hexylene glycol.

[0032] By adopting the above technical solutions, the leveling agent and the film-forming aid are optimized, which facilitates the selection of the leveling agent and the film-forming aid, and the raw materials are rich in sources and easy to obtain.

[0033] In a second aspect, the present application provides a preparation method of the above-mentioned high-strength and high-wear-resistant two-component fireproof floor coating, adopting the following technical solutions:

[0034] A preparation method of the above-mentioned high-strength and high-wear-resistant two-component fireproof floor coating includes the following steps:

[0035] S1. Preparation of powder mixture: Mix portland cement, dolomite powder, modified nano-silica, magnesium aluminum silicate powder, flame retardant, cellulose ether, starch ether, water reducing agent, defoaming agent, and retarding agent to obtain a powder mixture;

[0036] S2. Preparation of liquid mixture: Mix waterborne acrylic polymer emulsion, 1,3,5-benzenetricarbohydrazide, leveling agent, film-forming aid, preservative, and mildew preventive to obtain a liquid mixture;

[0037] S3. Mixing: Mix the powder mixture and the liquid mixture to obtain a two-component fireproof floor coating.

[0038] By adopting the above technical solution, the powder mixture and the liquid mixture are prepared in advance, and then the powder mixture and the liquid mixture are mixed, which is convenient for the preparation of the two-component fireproof floor coating.

[0039] To sum up, the present application has at least the following beneficial effects:

[0040] 1. In the two-component fireproof floor coating of the present application, magnesium aluminum silicate powder and modified nano-silica are added to the raw materials of the powder mixture, and 1,3,5-benzenetricarbohydrazide is added to the raw materials of the liquid mixture. By utilizing their synergistic effect and the mutual cooperation of the powder mixture and the liquid mixture, a three-dimensional network structure is formed, and the 28-day compressive strength > 42 MPa, the 28-day flexural strength > 11 MPa, and the wear amount < 240 mm 3 , significantly improving the compressive strength and wear resistance of the two-component fireproof floor coating, and meeting the requirements of higher demands.

[0041] 2. In the preparation method of the modified nano-silica, tetraethoxydivinyldisiloxane is grafted onto the surface of nano-silica, and then tetraethoxydivinyldisiloxane and diacetone acrylamide are polymerized on the surface of nano-silica by using persulfate, and siloxane group, amide group, and ketone carbonyl active groups are introduced, improving the use effect of the modified nano-silica and making the two-component fireproof floor coating exhibit better comprehensive performance. Specific Embodiments

[0042] To make the present application easier to understand, the present application will be further described in detail below in conjunction with embodiments. These embodiments are only illustrative and are not limited to the application scope of the present application. The raw materials or components used in the present application can be obtained through commercial channels or conventional methods without special instructions.

[0043] Preparation Examples

[0044] Preparation Example 1

[0045] A kind of modified nano-silica is prepared by the following method:

[0046] Add 3 kg of tetraethoxydivinyldisiloxane to 100 kg of water and stir for 10 min. Then add 10 kg of nano-silica and stir for 2 h. After that, add 2 kg of diacetone acrylamide and 0.06 kg of persulfate, and stir for 3 h. Filter to discard the filtrate, and then wash three times with water, with the amount of washing water used each time being 50 kg. Then dry at a temperature of 100 °C to obtain modified nano-silica.

[0047] Among them, the average particle size of the nano-silica is 100 nm, and it is selected from Hubei Huifu Nano Materials Co., Ltd.; the persulfate is sodium persulfate.

[0048] Preparation Example 2

[0049] A kind of modified nano-silica, the difference from Preparation Example 1 lies in the different preparation methods.

[0050] The specific preparation method is as follows: Add 2 kg of tetraethoxydivinyldisiloxane to 100 kg of water and stir for 10 min. Then add 10 kg of nano-silica and stir for 1 h. After that, add 3 kg of diacetone acrylamide and 0.08 kg of persulfate, and stir for 4 h. Filter to discard the filtrate, and then wash three times with water, with the amount of washing water used each time being 50 kg. Then dry at a temperature of 100 °C to obtain modified nano-silica.

[0051] Preparation Example 3

[0052] A kind of modified nano-silica, the difference from Preparation Example 1 lies in the different preparation methods.

[0053] The specific preparation method is as follows: Add 4 kg of tetraethoxydivinyldisiloxane to 100 kg of water and stir for 10 min. Then add 10 kg of nano-silica and stir for 3 h. After that, add 1 kg of diacetone acrylamide and 0.04 kg of persulfate, and stir for 2 h. Filter to discard the filtrate, and then wash three times with water, with the amount of washing water used each time being 50 kg. Then dry at a temperature of 100 °C to obtain modified nano-silica.

[0054] Examples

[0055] Table 1 Contents of each raw material in the powder mixture (unit: kg)

[0056] Examples Example 1 Example 2 Example 3 Portland cement 55 50 60 Dolomite powder 85 90 80 Modified nano-silica 15 13 18 Magnesium aluminum silicate powder 10 15 5 Flame retardant 13 15 10 Cellulose ether 5 4 6 Starch ether 2 1 3 Water reducing agent 3 4 2 Defoamer 1 0.5 1.5 Retarder 1 1.5 0.5

[0057] Table 2 Contents of each raw material in the liquid mixture (unit: kg)

[0058]

[0059]

[0060] Example 1

[0061] A high-strength and high-wear-resistant two-component fireproof floor coating is made from a powder mixture and a liquid mixture, and the weight ratio of the powder mixture to the liquid mixture is 5:2. The raw materials and their ratios of the powder mixture are shown in Table 1, and the raw materials and their ratios of the liquid mixture are shown in Table 2.

[0062] Among them, the Portland cement is Portland cement P.O42.5R; the average particle size of the dolomite powder is 1.5 mm, and it is selected from Jiangxi Chenxin New Materials Co., Ltd.; the average particle size of the magnesium aluminum silicate powder is 2 μm, and it is selected from Wuhan Jiyesheng Chemical Co., Ltd.; the cellulose ether is cellulose ether LH70m, the starch ether is QSC-starch ether B, and it is selected from Wuhan Runxingyuan Technology Co., Ltd.; the water reducer is a polycarboxylate water reducer, specifically polycarboxylate water reducer AN4000; the defoamer is defoamer AGITAN-P823; the retarder is sodium gluconate; the waterborne acrylic polymer emulsion is LEAC acrylic polymer emulsion, specifically LEAC acrylic polymer emulsion SH95, and it is selected from Guangdong Shuanghong Environmental Protection New Materials Co., Ltd.; the leveling agent is leveling agent BYK-348; the film-forming aid is dodecyl alcohol ester; the preservative is preservative 5011F, and the mildew-proof agent is mildew-proof agent M2, and it is selected from Foshan Abel Chemical Co., Ltd.

[0063] The flame retardants are aluminum hydroxide and ammonium polyphosphate, and the weight ratio of aluminum hydroxide to ammonium polyphosphate is 1:1. The ammonium polyphosphate is selected from Shandong Kepler Biotechnology Co., Ltd.; the modified nano-silica is obtained by graft polymerization of nano-silica with tetraethoxydivinyldisiloxane and diacetone acrylamide, and the modified nano-silica is prepared by Preparation Example 1.

[0064] A preparation method of a high-strength and high-wear-resistant two-component fireproof floor coating includes the following steps:

[0065] S1. Prepare the powder mixture: Add Portland cement to the dolomite powder, stir for 10 min, then add the modified nano-silica, magnesium aluminum silicate powder, and flame retardant, stir for 10 min, and then add the cellulose ether, starch ether, water reducer, defoamer, and retarder, stir for 30 min to obtain the powder mixture.

[0066] S2. Prepare the liquid mixture: Add 1,3,5-benzenetricarbohydrazide, leveling agent, film-forming aid, preservative, and mildew-proof agent to the waterborne acrylic polymer emulsion, stir for 30 min to obtain the liquid mixture.

[0067] S3. Mixing: Add liquid mixture to the powder mixture and stir for 30 minutes to obtain a two-component fireproof floor coating.

[0068] Example 2

[0069] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the raw material ratio of the powder mixture is different, the raw material ratio of the liquid mixture is different, and the raw material ratio of the powder mixture is shown in Table 1, and the raw material ratio of the liquid mixture is shown in Table 2.

[0070] Example 3

[0071] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the raw material ratio of the powder mixture is different, the raw material ratio of the liquid mixture is different, and the raw material ratio of the powder mixture is shown in Table 1, and the raw material ratio of the liquid mixture is shown in Table 2.

[0072] Example 4

[0073] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the weight ratio of the powder mixture to the liquid mixture is different, and the weight ratio of the powder mixture to the liquid mixture is 10:3.

[0074] Example 5

[0075] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the weight ratio of the powder mixture to the liquid mixture is different, and the weight ratio of the powder mixture to the liquid mixture is 2:1.

[0076] Example 6

[0077] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the source of the modified nano-silica in the raw materials of the powder mixture is different, and the modified nano-silica is obtained by using Preparation Example 2.

[0078] Example 7

[0079] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the source of the modified nano-silica in the raw materials of the powder mixture is different, and the modified nano-silica is obtained by using Preparation Example 3.

[0080] Comparative Example

[0081] Comparative Example 1

[0082] A two-component fireproof floor coating with high strength and high wear resistance, which is different from Example 1 in that the modified nano-silica in the raw materials of the powder mixture is replaced with an equal amount of nano-silica.

[0083] Comparative Example 2

[0084] A two-component fireproof floor coating with high strength and high wear resistance. The difference from Example 1 is that in the preparation method of modified nano-silica, an equal amount of diacetone acrylamide is used to replace tetraethoxydivinyldisiloxane.

[0085] Comparative Example 3

[0086] A two-component fireproof floor coating with high strength and high wear resistance. The difference from Example 1 is that in the preparation method of modified nano-silica, an equal amount of tetraethoxydivinyldisiloxane is used to replace diacetone acrylamide.

[0087] Comparative Example 4

[0088] A two-component fireproof floor coating with high strength and high wear resistance. The difference from Example 1 is that in the raw materials of the liquid mixture, an equal amount of waterborne acrylic polymer emulsion is used to replace 1,3,5-benzenetricarbohydrazide.

[0089] Comparative Example 5

[0090] A two-component fireproof floor coating with high strength and high wear resistance. The difference from Example 1 is that in the raw materials of the powder mixture, an equal amount of modified nano-silica is used to replace aluminum magnesium silicate powder.

[0091] Comparative Example 6

[0092] A two-component fireproof floor coating with high strength and high wear resistance. The difference from Example 1 is that in the raw materials of the powder mixture, an equal amount of aluminum magnesium silicate powder is used to replace modified nano-silica.

[0093] Performance Detection

[0094] Take the two-component fireproof floor coatings obtained in Examples 1-7 and Comparative Examples 1-6 as samples respectively, and conduct the following performance detections on the samples. The detection results are shown in Table 3.

[0095] Among them, according to GB / T17671-1999 "Test Method for Strength of Cement Mortar", the 28-day compressive strength and 28-day flexural strength of the two-component fireproof floor coating are detected.

[0096] According to JC / T985-2017 "Cementitious Self-Leveling Mortar for Floor", the tensile bond strength, wear amount and 20-minute fluidity of the two-component fireproof floor coating are detected.

[0097] According to GB8624-2012 "Classification of the Fire Performance of Building Materials and Products", the fire protection grade of the two-component fireproof floor coating is detected.

[0098] Table 3 Test Results

[0099]

[0100]

[0101] As can be seen from Table 3, the two-component fireproof floor coating of the present application has high 28-day compressive strength, 28-day flexural strength, and tensile bond strength. The 28-day compressive strength is 42.7 - 45.6 MPa, the 28-day flexural strength is 11.9 - 13.7 MPa, the tensile bond strength is 1.8 - 2.1 MPa, and the fire protection grade is Class A, showing the advantages of high strength, high adhesion, and high fire protection. Moreover, it also has a low wear amount, with the wear amount being 186 - 238 mm 3 , showing the advantage of high wear resistance. At the same time, it also has a high 20-minute fluidity, with the 20-minute fluidity being 143 - 163 mm, showing the advantage of high fluidity. The two-component fireproof floor coating of the present application, through the mutual cooperation between powder mixing and liquid mixing, shows the characteristics of high strength, high adhesion, high wear resistance, good fluidity, and high fire protection, has good comprehensive performance, and meets the market demand.

[0102] Comparing Example 1 with Comparative Examples 1 - 3, the nano-silica in Comparative Example 1 was not modified; the nano-silica in Comparative Example 2 was modified with diacetone acrylamide; the nano-silica in Comparative Example 3 was modified with tetraethoxydivinyldisiloxane; the nano-silica in Example 1 was modified with diacetone acrylamide and tetraethoxydivinyldisiloxane. It can be seen from this that modifying the nano-silica can improve the performance of the two-component fireproof floor coating. However, when using diacetone acrylamide or tetraethoxydivinyldisiloxane alone to treat the nano-silica, the performance improvement is limited. While using diacetone acrylamide and tetraethoxydivinyldisiloxane simultaneously to treat the nano-silica and taking advantage of the synergistic effect between the two can greatly improve the strength, adhesion, and wear resistance of the two-component fireproof floor coating.

[0103] Comparing Example 1 with Comparative Example 4, it can be seen from this that adding 1,3,5-benzenetricarbohydrazide to the raw materials of the liquid mixture can increase the compressive strength, flexural strength, and tensile bond strength of the two-component fireproof floor coating and reduce the wear amount of the two-component fireproof floor coating. This may be because 1,3,5-benzenetricarbohydrazide reacts with diacetone acrylamide on the surface of the modified nano-silica, increasing the bonding strength of the raw materials, thereby making the two-component fireproof floor coating show higher comprehensive performance.

[0104] Example 1 was compared with Comparative Examples 5-6. Modified nano-silica was added to the raw materials of the powder mixture in Comparative Example 5; magnesium aluminum silicate powder was added to the raw materials of the powder mixture in Comparative Example 6; modified nano-silica and magnesium aluminum silicate powder were added to the raw materials of the powder mixture in Example 1. It can be seen that by adding modified nano-silica and magnesium aluminum silicate powder simultaneously to the raw materials of the powder mixture and utilizing the synergistic effect between the two, the compressive strength, flexural strength, and tensile bond strength of the two-component fireproof floor coating can be effectively improved, and the wear amount of the two-component fireproof floor coating can be significantly reduced, thereby improving the performance of the two-component fireproof floor coating.

[0105] It should be noted that the above-described embodiments are only used to explain the present application and do not constitute any limitation to the present application. The present application has been described by referring to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words rather than limiting words. Modifications can be made to the present application within the scope of the claims of the present application as stipulated, and the present invention can be revised without departing from the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials, and embodiments, it does not mean that the present application is limited to the specific examples disclosed therein. On the contrary, the present application can be extended to all other methods and applications with the same functions.

Claims

1. A two-component fireproof floor coating with high strength and high wear resistance, characterized in that: It is made from a powder mixture and a liquid mixture, and the weight ratio of the powder mixture to the liquid mixture is 10:(3 - 5); The powder mixture is mainly made from the following raw materials by weight: 50 - 60 parts of portland cement, 80 - 90 parts of dolomite powder, 13 - 18 parts of modified nano-silica, 5 - 15 parts of magnesium aluminum silicate powder, 10 - 15 parts of flame retardant, 4 - 6 parts of cellulose ether, 1 - 3 parts of starch ether, 2 - 4 parts of water reducing agent, 0.5 - 1.5 parts of defoamer, 0.5 - 1.5 parts of retarder; The liquid mixture is mainly made from the following raw materials by weight: 50 - 60 parts of waterborne acrylic polymer emulsion, 6 - 8 parts of 1,3,5 - benzenetricarbohydrazide, 2 - 4 parts of leveling agent, 2 - 4 parts of film - forming aid, 0.5 - 1.5 parts of preservative, 0.5 - 1.5 parts of mildew preventive; The modified nano - silica is obtained by graft polymerization of nano - silica with tetraethoxydivinyldisiloxane and diacetone acrylamide.

2. The two-component fireproof floor coating with high strength and high wear resistance according to claim 1, characterized in that: The modified nano - silica is prepared by the following method: Mix tetraethoxydivinyldisiloxane in water, then add nano - silica, stir for 1 - 3 h, then add diacetone acrylamide and persulfate, stir for 2 - 4 h, filter to discard the filtrate, wash, and dry to obtain the modified nano - silica.

3. The two-component fireproof floor coating with high strength and high wear resistance according to claim 2, characterized in that: The weight ratio of the nano - silica, tetraethoxydivinyldisiloxane, diacetone acrylamide, and persulfate is 10:(2 - 4):(1 - 3):(0.04 - 0.08).

4. The two-component fireproof floor coating with high strength and high wear resistance according to claim 2, wherein: The persulfate is one or several of sodium persulfate, potassium persulfate, and ammonium persulfate.

5. A two-component fireproof floor coating with high strength and high wear resistance according to claim 1, characterized in that: The average particle size of the nano - silica is 80 - 120 nm; the average particle size of the magnesium aluminum silicate powder is 1 - 5 μm.

6. The two-component fireproof floor coating with high strength and high wear resistance according to claim 1, characterized in that: The waterborne acrylic polymer emulsion is LEAC acrylic polymer emulsion.

7. A two-component fireproof floor coating with high strength and high wear resistance according to claim 1, characterized in that: The flame retardant is one or several of aluminum hydroxide, magnesium hydroxide, and ammonium polyphosphate.

8. A two-component fireproof floor coating with high strength and high wear resistance according to claim 1, characterized in that: The water reducing agent is a polycarboxylate water reducing agent; The defoamer is one or several of defoamer AGITAN - P823, defoamer NXZ, and defoamer BAPE; The retarder is one or several of sodium gluconate, sodium citrate, and sodium lignosulfonate.

9. A two-component fireproof floor coating with high strength and high wear resistance according to claim 1, characterized in that: The leveling agent is one or several of leveling agent BYK - 348, leveling agent EFKA - 3230, and leveling agent CASTLE - 3410; The film - forming aid is one or several of dodecyl alcohol ester, propylene glycol ethyl ether, and hexylene glycol.

10. A preparation method of a high-strength and high-wear-resistant two-component fireproof floor coating as described in any one of claims 1-9, characterized in that: It includes the following steps: S1. Prepare the powder mixture: Mix portland cement, dolomite powder, modified nano - silica, magnesium aluminum silicate powder, flame retardant, cellulose ether, starch ether, water reducing agent, defoamer, and retarder to obtain the powder mixture; S2. Prepare the liquid mixture: Mix waterborne acrylic polymer emulsion, 1,3,5 - benzenetricarbohydrazide, leveling agent, film - forming aid, preservative, and mildew preventive to obtain the liquid mixture; S3. Mixing: Mix the powder mixture and the liquid mixture to obtain the two - component fire - resistant floor coating.

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