Quick-drying waterproof coating and preparation method thereof

Abstract

The invention discloses a quick-drying waterproof coating and a preparation method thereof, and belongs to the technical field of coatings. The quick-drying waterproof coating is prepared from the following raw materials: a liquid material and a powder material in a mass ratio of 1: (1.2-1.8), the powder comprises white Portland cement, white high-alumina cement, metakaolin, fine sand, coarse whiting, calcium chloride, calcium formate, a powder defoaming agent, a water reducing agent and cellulose ether; the liquid material comprises an acrylic emulsion, a coalescing agent, water, a defoaming agent, a dispersing agent and a sterilizing agent. The quick-drying waterproof coating has the advantages of high drying speed in a low-temperature and high-humidity environment, difficulty in cracking, difficulty in whitening, good early strength and tensile property and the like. The method can be applied to a low-temperature and high-humidity environment, the actual construction requirements of customers are met, the construction efficiency is improved, and the construction comprehensive cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint, in particular to a fast-drying waterproof coating and a preparation method thereof. BACKGROUND

[0002] In recent years, the field of building waterproofing in China has developed rapidly, and the requirements of construction parties for waterproofing materials are increasing and increasingly diverse. The waterproofing coatings on the market currently have the problems of slow drying, easy cracking and easy whitening in a low-temperature and high-humidity environment.

[0003] Polymer cement waterproofing coating is a volatile solidification type water-based coating, and the drying speed thereof depends on the volatilization rate of water in the coating. Compared with solvent-based coatings, the evaporation heat of water is higher, so the evaporation speed of water is ten or even dozens of times slower than that of solvent-based coatings under the same conditions. Especially in a low-temperature or high-humidity environment, the volatilization speed of water in the slurry system is further slowed down, which may result in the problems of slow drying speed or even no drying of the coating.

[0004] Temperature and humidity are important factors affecting the solidification speed of the coating of polymer cement waterproofing coating. Increasing the temperature can effectively accelerate the evaporation efficiency of water in the slurry and increase the solidification speed of the coating. However, the solidification temperature should not exceed 50 DEG C, otherwise the water may evaporate too fast, which may result in the problems of blistering, warping, cracking and discoloration of the waterproofing coating.

[0005] In view of this, the present application is proposed. SUMMARY

[0006] The present application aims to provide a fast-drying waterproof coating and a preparation method thereof to solve or improve the above technical problems.

[0007] The present application can be realized as follows: In a first aspect, the present application provides a fast-drying waterproof coating, and the preparation raw materials of the fast-drying waterproof coating include liquid materials and powder materials with a mass ratio of 1: (1.2-1.8). The powder materials include white portland cement, white high-alumina cement, metakaolin, fine sand, heavy calcium, calcium chloride, calcium formate, a powder defoaming agent, a water reducing agent and a cellulose ether with a mass ratio of (30-35):(10-15):(2-5):(15-18):(30-33):(0.5-1):(0.5-1):(0.3-0.5):(0.3-0.5):(0.00-0.01). The liquid materials include an acrylic emulsion, a film-forming aid, water, a defoaming agent, a dispersant and a bactericide with a mass ratio of (85-90):(1-1.5):(9-10):(0.3-0.5):(0.1-0.3):(0.1-0.5).

[0008] In an optional embodiment, the white portland cement comprises PW42.5 white cement; And / or, the white high alumina cement comprises white sulfoaluminate cement.

[0009] In an optional embodiment, the particle size of the metakaolin is 1200 mesh to 1300 mesh; And / or, the particle size of the fine sand is 70 mesh to 200 mesh; And / or, the particle size of the heavy calcium carbonate is 325 mesh to 400 mesh.

[0010] In an optional embodiment, the powder defoaming agent comprises P803 defoaming agent; And / or, the water reducing agent comprises 6030 water reducing agent; And / or, the cellulose ether comprises ME40000S.

[0011] In an optional embodiment, the acrylic emulsion comprises BADF 7365 emulsion.

[0012] In an optional embodiment, the film forming aid comprises Texanol.

[0013] In an optional embodiment, the defoaming agent is a silicone defoaming agent.

[0014] In an optional embodiment, the defoaming agent comprises SILFOAM SC-120 silicone defoaming agent.

[0015] In an optional embodiment, the dispersant is a sodium salt dispersant.

[0016] In an optional embodiment, the dispersant comprises 5040 dispersant.

[0017] In an optional embodiment, the bactericide comprises M100 bactericide.

[0018] In a second aspect, the present application provides a preparation method of the fast-drying waterproof coating as claimed in any one of the preceding embodiments, comprising the following steps: mixing the white portland cement, the white high alumina cement, the active inorganic filler, the fine sand, the heavy calcium carbonate, the calcium chloride, the calcium formate, the defoaming agent, the water reducing agent and the cellulose ether according to the proportions to obtain a powder; mixing the acrylic emulsion, the film forming aid, the water, the defoaming agent, the dispersant and the bactericide according to the proportions to obtain a liquid; mixing the powder and the liquid to obtain the fast-drying waterproof coating.

[0019] The beneficial effects of the present application include: The present application can promote the reaction speed of the emulsion and cement, promote the hydration reaction and improve the dry speed by adopting special powder and liquid cooperation; the cement hydration reaction and reaction temperature can be improved, the water evaporation rate is increased and the polymerization reaction is promoted by using fast-drying cement and calcium salt additives; the cracking and whitening phenomenon caused by rapid reaction can be reduced by using active inorganic additives (powder defoamer, water reducing agent and cellulose ether) and fillers (metakaolin, calcium chloride, calcium formate, fine sand and heavy calcium).

[0020] The coating provided by the present application has the advantages of fast drying speed, not easy to crack and whiten, good early strength and tensile properties, etc. in a low-temperature and high-humidity environment. In a low-temperature and high-humidity environment, the drying time of the coating is significantly improved, which helps to shorten the construction cycle and improve the overall efficiency for construction personnel. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below. If the specific conditions are not specified in the embodiments, the conventional conditions or the conditions recommended by the manufacturer are used. If the reagents or instruments used are not specified by the manufacturer, they are all conventional products that can be purchased on the market.

[0022] The fast-drying waterproof coating provided by the present application and the preparation method thereof will be described in detail below.

[0023] The present application provides a fast-drying waterproof coating, and the preparation raw materials of the fast-drying waterproof coating include liquid and powder with a mass ratio of 1:(1.2~1.8).

[0024] The mass ratio of the liquid and the powder can be 1:1.2, 1:1.25, 1:3, 1:3.5, 1:4, 1:4.5, 1:5, 1:5.5, 1:6, 1:6.5, 1:7, 1:7.5 or 1:8, etc., or other values within the range of 1:(1.2~1.8).

[0025] The above-mentioned powder can include white portland cement, white high-alumina cement, metakaolin, fine sand, heavy calcium, calcium chloride, calcium formate, powder defoamer, water reducing agent and cellulose ether with a mass ratio of (30~35):(10~15):(2~5):(15~18):(30~33):(0.5~1):(0.5~1):(0.3~0.5):(0.3~0.5):(0.00~0.01).

[0026] For example, the content of white portland cement in the powder can be 30 parts, 31 parts, 32 parts, 33 parts, 34 parts or 35 parts, etc., or other values within the range of 30 parts to 35 parts, in terms of weight parts.

[0027] The content of white high-alumina cement in the powder can be 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 13 parts, 14 parts, or 15 parts, etc., or other values within the range of 10 parts to 15 parts.

[0028] The content of metakaolin in the powder can be 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts, etc., or other values within the range of 2 parts to 5 parts.

[0029] The content of fine sand in the powder can be 15 parts, 15.5 parts, 16 parts, 16.5 parts, 17 parts, 17.5 parts, or 18 parts, etc., or other values within the range of 15 parts to 18 parts.

[0030] The content of heavy calcium in the powder can be 30 parts, 30.5 parts, 31 parts, 31.5 parts, 32 parts, 32.5 parts, or 33 parts, etc., or other values within the range of 30 parts to 33 parts.

[0031] The content of calcium chloride in the powder can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1 part, etc., or other values within the range of 0.5 parts to 1 part.

[0032] The content of calcium formate in the powder can be 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, or 1 part, etc., or other values within the range of 0.5 parts to 1 part.

[0033] The content of the defoaming agent in the powder can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, or 0.5 parts, etc., or other values within the range of 0.3 parts to 0.5 parts.

[0034] The content of the water reducing agent in the powder can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, or 0.5 parts, etc., or other values within the range of 0.3 parts to 0.5 parts.

[0035] The content of cellulose ether in the powder can be 0 parts, 0.005 parts, or 0.01 parts, etc., or other values within the range of 0 parts to 0.01 parts.

[0036] The above-mentioned liquid material can include acrylic emulsion, film-forming aid, water, defoaming agent, dispersant, and bactericide in a mass ratio of (85-90):(1-1.5):(9-10):(0.3-0.5):(0.1-0.3):(0.1-0.3).

[0037] For example, the content of acrylic emulsion in the liquid material can be 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, or 90 parts, etc., or other values within the range of 85 parts to 90 parts, in terms of parts by weight.

[0038] The content of the film forming aid in the liquid material can be 1 part, 1.1 part, 1.2 part, 1.3 part, 1.4 part, or 1.5 part, etc., or other values within the range of 1 part to 1.5 part.

[0039] The content of water in the liquid material can be 9 parts, 9.5 parts, or 10 parts, etc., or other values within the range of 9 parts to 10 parts.

[0040] The content of the defoaming agent in the liquid material can be 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, or 0.5 parts, etc., or other values within the range of 0.3 parts to 0.5 parts.

[0041] The content of the dispersing agent in the liquid material can be 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, or 0.3 parts, etc., or other values within the range of 0.1 parts to 0.3 parts.

[0042] The content of the bactericide in the liquid material can be 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, or 0.5 parts, etc., or other values within the range of 0.1 parts to 0.5 parts.

[0043] In some optional embodiments, the white Portland cement can include PW42.5 white cement.

[0044] The white high-alumina cement can include white sulfoaluminate cement.

[0045] The metakaolin can be metakaolin commonly used in the art. In some preferred embodiments, the particle size of the metakaolin used in the present application can be 1200 mesh to 1300 mesh, such as 1200 mesh, 1250 mesh, or 1300 mesh, etc., or other values within the range of 1200 mesh to 1300 mesh.

[0046] The particle size of the fine sand can be 70 mesh to 200 mesh, such as 70 mesh, 80 mesh, 90 mesh, 100 mesh, 110 mesh, 120 mesh, 130 mesh, 140 mesh, 150 mesh, 160 mesh, 170 mesh, 180 mesh, 190 mesh, or 200 mesh, etc., or other values within the range of 140 mesh to 200 mesh.

[0047] The particle size of the heavy calcium can be 325 mesh to 400 mesh, such as 325 mesh, 350 mesh, 375 mesh, or 400 mesh, etc., or other values within the range of 325 mesh to 400 mesh.

[0048] The calcium chloride can exemplarily be Jinnuo Chemical Calcium Chloride Dihydrate.

[0049] The calcium formate can exemplarily be Fulin Chemical Industry Grade 1 Calcium Formate.

[0050] The powder defoamer can include Mingling P803 defoamer.

[0051] The water reducing agent can include Xingbang 6030 water reducing agent.

[0052] The cellulose ether can include Herd ME40000S.

[0053] The acrylic emulsion can be selected from acrylic emulsions conventionally used in the art. In some preferred embodiments, the acrylic emulsion can include BADF 7365 emulsion, which has the characteristics of low film forming temperature, good film forming flexibility, excellent anti-cracking performance, low water absorption, etc., and has a faster film forming rate than the same performance of styrene butyl emulsion or VAE emulsion.

[0054] The film forming aid can be selected from film forming aids conventionally used in the art. In some preferred embodiments, the film forming aid can include, for example, Texanol film forming aid.

[0055] The defoamer can be selected from defoamers conventionally used in the art. In some preferred embodiments, the defoamer can be a silicone defoamer, for example, can include Wacker SILFOAM SC-120 silicone defoamer.

[0056] The dispersant can be selected from dispersants conventionally used in the art. In some preferred embodiments, the dispersant can be a sodium salt dispersant, for example, can include Dowfume 5040 dispersant.

[0057] The bactericide can be selected from bactericides conventionally used in the art. In some preferred embodiments, the bactericide can include Dime M100 bactericide.

[0058] As described above, the powder provided by the present application contains a certain amount of white high alumina cement, which can generate a large amount of hydrates (calcium aluminate, etc.) after mixing with water in the liquid material, promoting the hydration reaction. And a large amount of heat will be released during the above reaction process, which will increase the temperature of the product during use, increase the water evaporation rate in the slurry, and help the paint to achieve the effect of fast drying.

[0059] The calcium chloride contained in the powder can react with the calcium salt generated by the hydration reaction of water and cement in the formula, release heat through oxidation-reduction reaction, increase the temperature of the product during use, increase the water evaporation rate in the slurry, and also help the paint to achieve the effect of fast drying.

[0060] The calcium formate contained in the powder can promote the hydration reaction of cement to generate (C-S-H gel), increase the tensile strength and adhesion strength of the paint in the early stage.

[0061] The BADF 7365 acrylic emulsion in the liquid material has the characteristics of low film forming temperature, good film forming flexibility, excellent anti-cracking performance and low water absorption rate, and has a faster film forming rate than the butyl benzene emulsion and VAE emulsion with the same performance.

[0062] Therefore, the present application improves the reaction speed of the emulsion and cement, promotes the hydration reaction, and improves the dry speed by special emulsion polymerization; the cement hydration reaction and reaction temperature are improved by using fast-drying cement and calcium salt additives, the water evaporation rate is increased, and the polymerization reaction is improved. By using active inorganic additives (powder defoamer, water reducing agent and cellulose ether) and fillers (metakaolin, calcium chloride, calcium formate, fine sand and heavy calcium), the cracking and whitening phenomenon caused by rapid reaction is reduced. The coating provided by the present application has the advantages of fast drying speed, not easy to crack, not easy to whiten, good early strength and tensile performance in low temperature and high humidity environment.

[0063] Correspondingly, the present application also provides a preparation method of the above-mentioned fast-drying waterproof coating, comprising the following steps: mixing white Portland cement, white high-alumina cement, active inorganic filler, fine sand, heavy calcium, calcium chloride, calcium formate, defoamer, water reducing agent and cellulose ether according to the proportion to obtain a powder; mixing acrylic emulsion, film forming aid, water, defoamer, dispersant and bactericide according to the proportion to obtain a liquid material; mixing the powder and the liquid material to obtain the fast-drying waterproof coating.

[0064] The preparation method is simple, easy to operate, and can be mass produced.

[0065] The features and performance of the present application are further described in detail below in combination with examples.

[0066] Example 1 The present example provides a fast-drying waterproof coating, and the preparation method is as follows: S1: preparing a powder.

[0067] The powder includes 30 parts of white Portland cement, 15 parts of white high-alumina cement, 2 parts of metakaolin, 17.69 parts of fine sand, 33 parts of heavy calcium, 1 part of calcium chloride, 0.5 parts of calcium formate, 0.4 parts of powder defoamer, 0.4 parts of water reducing agent and 0.01 parts of cellulose ether, in terms of mass fraction.

[0068] The white Portland cement is PW42.5 cement; the particle size of the metakaolin is 1250 mesh; the particle size of the fine sand is 70 mesh; the particle size of the heavy calcium is 325 mesh; the calcium chloride is Jinlei Chemical Calcium Chloride Dihydrate; the calcium formate is Fulin Chemical Industry Grade I Calcium Formate; the powder defoamer is Mingling P803 defoamer; the water reducing agent is Xingbang 6030 water reducing agent; and the cellulose ether is Heda ME40000S.

[0069] S2: preparing a liquid material.

[0070] The liquid material includes 88 parts of acrylic emulsion, 1.5 parts of film forming aid, 9.8 parts of water, 0.3 parts of defoaming agent, 0.1 parts of dispersing agent and 0.3 parts of bactericide by mass fraction.

[0071] The acrylic emulsion is BADF7365 emulsion; the film forming aid is Texanol film forming aid; the defoaming agent is Wacker SILFOAM SC-120 silicone defoaming agent; the dispersing agent is Dow Chemical 5040 dispersing agent; and the bactericide is Dime M100 bactericide.

[0072] S3: preparing the quick-drying waterproof coating.

[0073] The above powder and liquid material are mixed in a mass ratio of 1:1.5.

[0074] Example 2 The difference between this example and Example 1 is that: The white portland cement in the powder is 35 parts, and the white high-alumina cement is 10 parts by mass fraction, and the fillers and aids are the same as in Example 1.

[0075] The liquid material includes 88 parts of acrylic emulsion, 2 parts of film forming aid, 8.8 parts of water, 0.4 parts of defoaming agent, 0.3 parts of dispersing agent and 0.5 parts of bactericide by mass fraction.

[0076] Example 3 This example provides a quick-drying waterproof coating, and the preparation method is as follows: S1: preparing the powder.

[0077] The powder includes 35 parts of white portland cement, 13 parts of white high-alumina cement, 5 parts of metakaolin, 15 parts of fine sand, 30.39 parts of heavy calcium, 0.5 parts of calcium chloride, 0.5 parts of calcium formate, 0.3 parts of powder defoaming agent, 0.3 parts of water reducing agent and 0.01 parts of cellulose ether by mass fraction.

[0078] The white portland cement is PW42.5 cement; the particle size of metakaolin is 1200 mesh; the particle size of fine sand is 140 mesh; the particle size of heavy calcium is 325 mesh; the calcium chloride is Jinlei Chemical calcium chloride dihydrate; the calcium formate is Fulin Chemical Industry Grade I calcium formate; the powder defoaming agent is Mingling P803 defoaming agent; the water reducing agent is Xingbang 6030 water reducing agent; and the cellulose ether is Heda ME40000S.

[0079] S2: preparing the liquid material.

[0080] The liquid material includes 87.5 parts of acrylic emulsion, 1.3 parts of film forming aid, 9.7 parts of water, 0.5 parts of defoaming agent, 0.5 parts of dispersing agent and 0.5 parts of bactericide by mass fraction.

[0081] The acrylic emulsion is BADF7365 emulsion; the film forming aid is Texanol film forming aid; the defoaming agent is Wacker SILFOAM SC-120 silicone defoaming agent; the dispersing agent is Dow Chemical 5040 dispersing agent; and the bactericide is Dime M100 bactericide.

[0082] S3: preparing the quick-drying waterproof coating.

[0083] The above-mentioned powder and liquid are mixed in a mass ratio of 1:1.2.

[0084] Example 4 The quick-drying waterproof coating is prepared according to the following method: S1: preparing the powder.

[0085] The powder includes, in parts by mass, 32 parts of white Portland cement, 12 parts of white high alumina cement, 3 parts of metakaolin, 18 parts of fine sand, 32 parts of heavy calcium, 1 part of calcium chloride, 1 part of calcium formate, 0.5 part of powder defoaming agent, 0.5 part of water reducing agent, and 0 part of cellulose ether.

[0086] The white Portland cement is PW42.5 cement; the metakaolin has a particle size of 1300 mesh; the fine sand has a particle size of 200 mesh; the heavy calcium has a particle size of 400 mesh; the calcium chloride is Jinlei Chemical calcium chloride dihydrate; the calcium formate is Fulin Chemical Industry Grade I calcium formate; the powder defoaming agent is Mingling P803 defoaming agent; the water reducing agent is Xingbang 6030 water reducing agent; and the cellulose ether is Heda ME40000S.

[0087] S2: preparing the liquid.

[0088] The liquid includes, in parts by mass, 89 parts of acrylic emulsion, 1 part of film forming aid, 9 parts of water, 0.3 part of defoaming agent, 0.1 part of dispersing agent, and 0.1 part of bactericide.

[0089] The acrylic emulsion is BADF7365 emulsion; the film forming aid is Texanol film forming aid; the defoaming agent is Wacker SILFOAM SC-120 silicone defoaming agent; the dispersing agent is Dow Chemical 5040 dispersing agent; and the bactericide is Dime M100 bactericide.

[0090] S3: preparing the quick-drying waterproof coating.

[0091] The above-mentioned powder and liquid are mixed in a mass ratio of 1:1.8.

[0092] Comparative Example 1 The difference between the present comparative example and Example 2 is that: The white Portland cement in the powder is 45 parts, and the white high alumina cement is 0 part, and the fillers and aids are the same as in Example 1.

[0093] The liquid is the same as in Example 2.

[0094] Comparative Example 2 The difference between the present comparative example and Example 1 is that the powder does not contain calcium chloride, and the amount of calcium chloride is supplemented by calcium formate.

[0095] Test Example The coatings prepared in Examples 1-4 and Comparative Examples 1-2 are tested for performance in a low-temperature and high-humidity environment, with a temperature of 10℃ and a humidity of 95%. The tensile strength is tested according to GB 23445, the elongation at break is tested according to GB 23445, and the adhesion strength is tested according to GB 23445.

[0096] The test results are shown in Table 1.

[0097] Table 1 Test Results

[0098] As can be seen from Table 1, the coating provided by the present application has a shorter drying time, better tensile strength and adhesion strength, and lower elongation at break than the coating of the comparative example.

[0099] In summary, the fast-drying waterproof coating provided by the present application has the advantages of fast drying speed, not easy to crack, not easy to turn white, good early strength and tensile properties, etc. in a low-temperature and high-humidity environment. The drying time of the coating is significantly improved, which helps to shorten the construction cycle and improve the overall efficiency for construction personnel.

[0100] The above description is only preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A quick-drying waterproof coating, characterized in that: The raw materials for preparing the quick-drying waterproof coating include liquid and powder in a mass ratio of 1: (1.2-1.8); The powder comprises white Portland cement, white alumina cement, metakaolin, fine sand, heavy calcium carbonate, calcium chloride, calcium formate, powder defoamer, water reducer and cellulose ether in a mass ratio of (30-35):(10-15):(2-5):(15-18):(30-33):(0.5-1):(0.5-1):(0.3-0.5):(0.3-0.5):(0.00-0.01); The liquid material comprises acrylic emulsion, film-forming aid, water, defoaming agent, dispersant and bactericide in a mass ratio of (85-90):(1-1.5):(9-10):(0.3-0.5):(0.1-0.3):(0.1-0.5).

2. The quick-drying waterproof coating according to claim 1, characterized in that: The white Portland cement includes PW42.5 white cement; And / or, the white high alumina cement includes white sulphoaluminate cement.

3. The quick-drying waterproof coating according to claim 1, characterized in that: The particle size of the metakaolin is 1200 mesh to 1300 mesh; And / or, the particle size of the fine sand is 70 mesh to 200 mesh; And / or, the particle size of the heavy calcium is 325 mesh to 400 mesh.

4. The quick-drying waterproof coating according to claim 1, characterized in that: The powder defoamer includes P803 defoamer; And / or, the water reducer includes 6030 water reducer; And / or, the cellulose ether is ME40000S.

5. The quick-drying waterproof coating according to claim 1, characterized in that: The acrylic emulsion includes BADF 7365 emulsion.

6. The quick-drying waterproof coating according to claim 1, characterized in that: The film-forming aid includes Texanol.

7. The quick-drying waterproof coating according to claim 1, characterized in that: The defoamer is an organosilicon defoamer; Preferably, the defoaming agent comprises SILFOAMSC-120 silicone defoaming agent.

8. The quick-drying waterproof coating according to claim 1, characterized in that: The dispersant is a sodium salt dispersant; Preferably, the dispersant comprises 5040 dispersant.

9. The quick-drying waterproof coating according to claim 1, characterized in that: The bactericide includes M100 bactericide.

10. A method for preparing the quick-drying waterproof coating according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: mixing white silicate cement, white high-alumina cement, active inorganic filler, fine sand, heavy calcium, calcium chloride, calcium formate, defoamer, water reducer and cellulose ether according to a proportion to obtain a powder; mixing acrylic emulsion, film-forming aid, water, defoamer, dispersant and fungicide according to a proportion to obtain a liquid; and mixing the powder and the liquid to obtain the quick-drying waterproof coating.

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