Two-component polyurethane waterproof coating with high curing speed and preparation method thereof

Abstract

The invention relates to the technical field of waterproof materials, and particularly discloses a two-component polyurethane waterproof coating with high curing speed and a preparation method thereof. The invention relates to a two-component polyurethane waterproof coating with high curing speed, which comprises a component A and a component B, the component A comprises polyether polyol, diphenylmethane diisocyanate, liquid epoxy resin, hydrogenated bisphenol A epoxy resin, butyronitrile carboxylic acid toughening modified epoxy prepolymer, hydrogenated rosin pentaerythritol ester, a silane coupling agent, octylphenol polyoxyethylene ether phosphate, a defoaming agent and a flatting agent; the component B is prepared from a yellowing-resistant epoxy curing accelerator WE-15, a polyether amine curing agent D-230, an epoxy elastic curing agent WE-201AB-2, calcium dodecyl benzene sulfonate, octylphenol polyoxyethylene ether phosphate, filler and an anti-settling agent. The double-component polyurethane waterproof coating disclosed by the invention can still keep a good curing speed at a low temperature.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof materials, and in particular to a two-component polyurethane waterproof coating with fast curing speed and a preparation method thereof. Background Art

[0002] Two-component polyurethane waterproof coating is a two-component chemical reaction type waterproof coating in the field of waterproof materials. It is generally composed of component A, which is a prepolymer obtained by polymerization of polyether polyol and isocyanate, and component B, which is composed of curing agent, additives, etc. When used, component A and component B are mixed in a certain proportion, and a coating with waterproof properties is formed through chemical reaction. In modern construction projects, two-component polyurethane waterproof coatings have been widely used in the field of building waterproofing due to their good waterproof properties. However, traditional two-component polyurethane waterproof coatings have the problem of slow curing speed in low temperature environments, which greatly limits the construction efficiency in low temperature environments. In modern construction projects, construction efficiency is an important factor affecting project progress and cost. Slow curing speed may mean an extension of the construction period and an increase in construction costs, which greatly limits the popularity of two-component polyurethane waterproof coatings in low temperature environment engineering applications.

[0003] Therefore, further improving the curing speed of two-component polyurethane waterproof coatings in low temperature environments and shortening the construction waiting time have become technical problems that need to be urgently solved in the industry. Summary of the invention

[0004] In order to further improve the curing speed of two-component polyurethane waterproof coatings in low temperature environments and shorten the construction waiting time, the present application provides a two-component polyurethane waterproof coating with a fast curing speed and a preparation method thereof. When the two-component polyurethane waterproof coating of the present application is used, after the component A and the component B are mixed in a certain mass ratio, the coating can be quickly cured by reaction to form an elastic coating film of a certain thickness, thereby playing a waterproof role.

[0005] In the first aspect, the present application provides a two-component polyurethane waterproof coating with a fast curing speed, which adopts the following technical solution: A two-component polyurethane waterproof coating with a fast curing speed comprises a component A and a component B, wherein the component A comprises the following components in percentage by mass: 38% to 42% of polyether polyol, 3% to 6% of diphenylmethane diisocyanate, 6% to 10% of liquid epoxy resin, 36% to 40% of hydrogenated bisphenol A epoxy resin, 3% to 6% of nitrile carboxylic toughened modified epoxy prepolymer, 2% to 4% of hydrogenated rosin pentaerythritol ester, 0.8% to 1% of silane coupling agent, 0.02% to 0.04% of octylphenol polyoxyethylene ether phosphate, 0.01% to 0.03% of defoamer and 0.02% to 0.04% of leveling agent; The B component comprises the following components in mass percentage: 45% to 55% of yellowing-resistant epoxy curing accelerator WE-15, 8% to 12% of polyetheramine curing agent D-230, 18% to 22% of epoxy elastic curing agent WE-201AB-2, 0.8% to 1.1% of calcium dodecylbenzene sulfonate, 0.03% to 0.05% of octylphenol polyoxyethylene ether phosphate, 8% to 12% of filler and 8% to 10% of anti-settling agent.

[0006] In the above technical scheme, the present application selects hydrogenated bisphenol A epoxy resin as the main ingredient. The molecular structure of hydrogenated bisphenol A epoxy resin does not contain double bonds and benzene rings, but contains saturated six-membered rings, thereby improving the ability of the two-component polyurethane waterproof coating to resist ultraviolet radiation and antioxidant gases, thereby enhancing the weather resistance and durability of the coating; by introducing nitrile carboxyl toughened modified epoxy prepolymer, the flexibility, impact resistance and underwater adhesion of the coating are improved, so that the coating can still maintain good elasticity and adhesion in a low temperature environment; by introducing yellowing-resistant epoxy curing accelerator WE-15, polyetheramine curing agent D-230, epoxy elastic curing agent The accelerator WE-201AB-2 and the anti-yellowing epoxy curing accelerator WE-15 can improve the acid-base environment of the coating system and accelerate the curing reaction. The polyetheramine curing agent D-230 and the anti-yellowing epoxy curing accelerator WE-15 can further improve the acid-base environment of the coating system. After the polyetheramine curing agent D-230 and component A are mixed, the active hydrogen in the polyetheramine curing agent D-230 can attack the CC bond in the liquid epoxy resin, thereby quickly reacting to form a modified curing agent, which increases the proportion of non-polar segments in the molecular chain, thereby significantly improving the waterproof performance of the two-component polyurethane waterproof coating. Flexibility and processing performance, while the epoxy elastic curing agent WE-201AB-2 has high activity, and the yellowing-resistant epoxy curing accelerator WE-15 and the polyetheramine curing agent D-230 work together to significantly improve the curing speed of the two-component polyurethane waterproof coating under low temperature conditions; by introducing octylphenol polyoxyethylene ether phosphate, calcium dodecylbenzene sulfonate and hydrogenated rosin pentaerythritol ester, octylphenol polyoxyethylene ether phosphate has good dispersibility and surface activity, which can ensure the good dispersion of the components of the two-component polyurethane waterproof coating and reduce the problem of uneven local reaction. Calcium dodecylbenzene sulfonate can be in the polyetheramine curing agent D- 230 combined with the yellowing-resistant epoxy curing accelerator WE-15 further plays a role in pH adjustment and catalysis, creating a microenvironment conducive to rapid curing for the two-component polyurethane waterproof coating. The introduction of hydrogenated rosin pentaerythritol ester brings more cross-linking points. The effects of octylphenol polyoxyethylene ether phosphate, calcium dodecylbenzene sulfonate and hydrogenated rosin pentaerythritol ester, and octylphenol polyoxyethylene ether phosphate complement each other, allowing the two-component polyurethane waterproof coating to form a denser three-dimensional network structure, which not only further improves the curing speed of the two-component polyurethane waterproof coating under low temperature conditions, but also further improves the weather resistance of the coating.

[0007] Preferably, the component A comprises the following components in percentage by mass: 40.2% polyether polyol, 4.8% diphenylmethane diisocyanate, 8% liquid epoxy resin, 38% hydrogenated bisphenol A epoxy resin, 5% nitrile carboxylic toughened modified epoxy prepolymer, 3% hydrogenated rosin pentaerythritol ester, 0.92% silane coupling agent, 0.03% octylphenol polyoxyethylene ether phosphate, 0.02% defoamer and 0.03% leveling agent; The B component includes the following components in percentage by mass: 50% epoxy curing accelerator, 10% polyetheramine curing agent, 20% epoxy elastic curing agent, 0.94% calcium dodecylbenzene sulfonate, 0.04% octylphenol polyoxyethylene ether phosphate, 10% filler and 9.02% anti-settling agent.

[0008] Preferably, the mass ratio of component A to component B is 1:(1-2).

[0009] In the above technical solution, the present application further optimizes the ratio of component A and component B, so that the curing speed of the two-component polyurethane waterproof coating is faster, and the weather resistance of the coating is further improved.

[0010] Preferably, the filler is titanium dioxide, which has good hiding power and can improve the whiteness of the coating, so that the coating has a better decorative effect after curing.

[0011] Preferably, the anti-settling agent is silicon dioxide. As an anti-settling agent, silicon dioxide can effectively prevent the coating from settling during storage and use, ensure the uniformity and stability of the coating, and thus ensure the construction quality.

[0012] Preferably, the molecular weight of the polyether polyol is 1000 Dalton. Polyether polyol 1000D has good flexibility and bonding strength, and can fully react with diphenylmethane diisocyanate to form a stable polyurethane network structure.

[0013] In the second aspect, the present application provides a method for preparing a two-component polyurethane waterproof coating with a fast curing speed, which adopts the following technical scheme: A method for preparing a two-component polyurethane waterproof coating with a fast curing speed, wherein the method for preparing component A comprises the following steps: Step 1: Add polyether polyol into the reaction kettle and stir at a speed of 500-800r / min, and start heating at the same time, raise the temperature to 110°C-120°C, and start the vacuum pump, control the vacuum degree between -0.095MPa and -0.01MPa, and vacuum dehydrate for 2-2.5h; Step 2: Cool the material obtained in step 1 to 80-82°C, and then slowly add diphenylmethane diisocyanate in batches. After the addition is completed, react at a constant temperature of 80-85°C for 2-2.5h; Step 3: Cool the material obtained in step 2 to 58-60° C., add liquid epoxy resin, hydrogenated bisphenol A epoxy resin, nitrile carboxylic acid toughened modified epoxy prepolymer and hydrogenated rosin pentaerythritol ester into a reaction kettle and stir at a speed of 800-1000 r / min for 20-25 min; Step 4: Add the remaining material to the material obtained in step 3 and continue stirring for 15 to 20 minutes to obtain component A.

[0014] Preferably, the preparation method of the B component comprises the following steps: Step s1: adding epoxy curing accelerator, epoxy curing agent, epoxy elastic curing agent, calcium dodecylbenzene sulfonate and octylphenol polyoxyethylene ether phosphate into a dispersion tank, starting stirring, and homogenizing at a speed of 800 to 1000 r / min for 20 to 25 minutes; Step s2: slowly add filler and anti-settling agent to the material obtained in step s1, and after adding, homogenize at a speed of 1000-1500 r / min for 30-35 minutes to obtain component B.

[0015] In the above technical scheme, the present application ensures the stability and reactivity of component A and component B by controlling the reaction conditions and raw material ratio, so that the two-component polyurethane waterproof coating finally prepared has excellent curing speed and good physical and chemical properties. In practical applications, the two-component polyurethane waterproof coating of the present application can be quickly cured in a low temperature environment, shorten the construction period, improve the construction efficiency, and at the same time ensure the weather resistance, flexibility and waterproof performance of the coating, meeting the high requirements of modern construction projects for waterproof coatings.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application introduces yellowing-resistant epoxy curing accelerator WE-15, polyether amine curing agent D-230, and epoxy elastic curing agent WE-201AB-2. The yellowing-resistant epoxy curing accelerator WE-15 works together to significantly improve the curing speed of the two-component polyurethane waterproof coating under low temperature conditions.

[0017] 2. This application introduces octylphenol polyoxyethylene ether phosphate, calcium dodecylbenzene sulfonate and hydrogenated rosin pentaerythritol ester, and the effects of octylphenol polyoxyethylene ether phosphate, calcium dodecylbenzene sulfonate and hydrogenated rosin pentaerythritol ester complement each other, so that the two-component polyurethane waterproof coating can form a denser three-dimensional network structure, which not only further improves the curing speed of the two-component polyurethane waterproof coating under low temperature conditions, but also further improves the weather resistance of the coating.

[0018] 3. During the construction process, the two-component polyurethane waterproof coating of the present application can quickly form an elastic coating film with a certain thickness, effectively preventing water penetration and ensuring the durability of the waterproof effect. DETAILED DESCRIPTION

[0019] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0020] The sources of some substances in the following specific implementation methods are shown in Table 1.

[0021] Table 1: Example 1 The invention discloses a two-component polyurethane waterproof coating with fast curing speed, comprising component A and component B.

[0022] Among them, component A includes polyether polyol, diphenylmethane diisocyanate, liquid epoxy resin, hydrogenated bisphenol A type epoxy resin, nitrile carboxylic toughened modified epoxy prepolymer, hydrogenated rosin pentaerythritol ester, silane coupling agent, octylphenol polyoxyethylene ether phosphate, defoamer and leveling agent.

[0023] Among them, component B includes yellowing-resistant epoxy curing accelerator WE-15, polyetheramine curing agent D-230, epoxy elastic curing agent WE-201AB-2, calcium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether phosphate, filler and anti-settling agent.

[0024] Among them, the mass ratio of component A to component B is 1:1.

[0025] The method for preparing a two-component polyurethane waterproof coating with a fast curing speed includes the preparation of component A and component B.

[0026] The preparation method of component A comprises the following steps: Step 1: Add polyether polyol into the reactor and stir at a speed of 600 r / min. At the same time, turn on the temperature to 115°C, turn on the vacuum pump, control the vacuum degree between -0.098 MPa, and vacuum dehydrate for 2.2 hours.

[0027] Step 2: Cool the material obtained in step 1 to 81°C, then slowly add diphenylmethane diisocyanate in portions. After the addition, keep the reaction at 83°C for 2.2 hours.

[0028] Step 3: Cool the material obtained in step 2 to 59° C., add liquid epoxy resin, hydrogenated bisphenol A epoxy resin, nitrile carboxylic acid toughened modified epoxy prepolymer and hydrogenated rosin pentaerythritol ester into the reaction kettle and stir at a speed of 900 r / min for 22 minutes.

[0029] Step 4: Add the remaining material to the material obtained in step 3 and continue stirring for 18 minutes to obtain component A.

[0030] The preparation method of component B comprises the following steps: Step s1: Add epoxy curing accelerator, epoxy curing agent, epoxy elastic curing agent, calcium dodecylbenzene sulfonate and octylphenol polyoxyethylene ether phosphate into a dispersion tank, start stirring, and homogenize at a speed of 900 r / min for 22 minutes.

[0031] Step s2: slowly add filler and anti-settling agent to the material obtained in step s1, and after adding, homogenize at a speed of 1200 r / min for 32 minutes to obtain component B.

[0032] Example 2 A two-component polyurethane waterproof coating with a fast curing speed, which is different from Example 1 in that it includes component A and component B.

[0033] Among them, component A includes polyether polyol, diphenylmethane diisocyanate, liquid epoxy resin, hydrogenated bisphenol A type epoxy resin, nitrile carboxylic toughened modified epoxy prepolymer, hydrogenated rosin pentaerythritol ester, silane coupling agent, octylphenol polyoxyethylene ether phosphate, defoamer and leveling agent.

[0034] Among them, component B includes yellowing-resistant epoxy curing accelerator WE-15, polyetheramine curing agent D-230, epoxy elastic curing agent WE-201AB-2, calcium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether phosphate, filler and anti-settling agent.

[0035] Among them, the mass ratio of component A to component B is 1:1.

[0036] The method for preparing a two-component polyurethane waterproof coating with a fast curing speed includes the preparation of component A and component B.

[0037] The preparation method of component A comprises the following steps: Step 1: Add polyether polyol into the reactor and stir at a speed of 500r / min. At the same time, turn on the temperature to 120°C, turn on the vacuum pump, control the vacuum degree between -0.095MPaMPa, and vacuum dehydrate for 2.5h.

[0038] Step 2: Cool the material obtained in step 1 to 82°C, then slowly add diphenylmethane diisocyanate in portions. After the addition, keep the reaction at 85°C for 2.5 hours.

[0039] Step 3: Cool the material obtained in step 2 to 60° C., add liquid epoxy resin, hydrogenated bisphenol A epoxy resin, nitrile carboxylic acid toughened modified epoxy prepolymer and hydrogenated rosin pentaerythritol ester into the reaction kettle and stir at a speed of 1000 r / min for 20 min.

[0040] Step 4: Add the remaining material to the material obtained in step 3 and continue stirring for 15 minutes to obtain component A.

[0041] The preparation method of component B comprises the following steps: Step s1: Add epoxy curing accelerator, epoxy curing agent, epoxy elastic curing agent, calcium dodecylbenzene sulfonate and octylphenol polyoxyethylene ether phosphate into a dispersion tank, start stirring, and homogenize at a speed of 1000 r / min for 25 minutes.

[0042] Step s2: slowly add filler and anti-settling agent to the material obtained in step s1, and after adding, homogenize at a speed of 1000 r / min for 35 minutes to obtain component B.

[0043] Example 3 A two-component polyurethane waterproof coating with a fast curing speed, which is different from Example 1 in that it includes component A and component B.

[0044] Among them, component A includes polyether polyol, diphenylmethane diisocyanate, liquid epoxy resin, hydrogenated bisphenol A type epoxy resin, nitrile carboxylic toughened modified epoxy prepolymer, hydrogenated rosin pentaerythritol ester, silane coupling agent, octylphenol polyoxyethylene ether phosphate, defoamer and leveling agent.

[0045] Among them, component B includes yellowing-resistant epoxy curing accelerator WE-15, polyetheramine curing agent D-230, epoxy elastic curing agent WE-201AB-2, calcium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether phosphate, filler and anti-settling agent.

[0046] Among them, the mass ratio of component A to component B is 1:1.

[0047] The method for preparing a two-component polyurethane waterproof coating with a fast curing speed includes the preparation of component A and component B.

[0048] The preparation method of component A comprises the following steps: Step 1: Add polyether polyol into the reactor and stir at a speed of 800r / min. At the same time, turn on the temperature to 110℃, turn on the vacuum pump, control the vacuum degree between -0.01MPa, and vacuum dehydrate for 2h.

[0049] Step 2: Cool the material obtained in step 1 to 80°C, then slowly add diphenylmethane diisocyanate in portions. After the addition is complete, react at 85°C for 2 hours.

[0050] Step 3: Cool the material obtained in step 2 to 58° C., add liquid epoxy resin, hydrogenated bisphenol A epoxy resin, nitrile carboxylic acid toughened modified epoxy prepolymer and hydrogenated rosin pentaerythritol ester into the reaction kettle and stir at a speed of 800 r / min for 25 min.

[0051] Step 4: Add the remaining material to the material obtained in step 3 and continue stirring for 20 minutes to obtain component A.

[0052] The preparation method of component B comprises the following steps: Step s1: Add epoxy curing accelerator, epoxy curing agent, epoxy elastic curing agent, calcium dodecylbenzene sulfonate and octylphenol polyoxyethylene ether phosphate into a dispersion tank, start stirring, and homogenize at a speed of 800 r / min for 25 minutes.

[0053] Step s2: slowly add filler and anti-settling agent to the material obtained in step s1, and after adding, homogenize at a speed of 1500r / min for 30min to obtain component B.

[0054] The amounts of raw materials used in Examples 1 to 3 are shown in Table 2.

[0055] Table 2 (unit: kg): Comparative Example 1 A two-component polyurethane waterproof coating, which is different from Example 1 in that the yellowing-resistant epoxy curing accelerator WE-15 in component B is replaced by an epoxy resin curing accelerator K54 in equal amounts, which is purchased from Shandong Maofa Chemical Co., Ltd.

[0056] Comparative Example 2 A two-component polyurethane waterproof coating, which is different from Example 1 in that the polyetheramine curing agent D-230 in component B is replaced by an equal amount of polyetheramine curing agent T-403, which is purchased from Yixing Yanglin New Materials Co., Ltd.

[0057] Comparative Example 3 A two-component polyurethane waterproof coating, which is different from Example 1 in that the epoxy elastic curing agent WE-201AB-2 in component B is replaced by an equal amount of aliphatic amine epoxy curing agent CYDHD-593, which is purchased from Henan Huineng Resin Co., Ltd.

[0058] Comparative Example 4 A two-component polyurethane waterproof coating, which is different from Example 1 in that the hydrogenated rosin pentaerythritol ester in component A is replaced by hydrogenated rosin glycerol ester in an equal amount, and is purchased from Jiangsu Bost Chemical Technology Co., Ltd.

[0059] Comparative Example 5 A two-component polyurethane waterproof coating, which is different from Example 1 in that the octylphenol polyoxyethylene ether phosphate in components A and B is replaced by an equal amount of a wetting agent DISPERBYK-110 purchased from BYK Chemical Co., Ltd. of Germany.

[0060] Comparative Example 6 A two-component polyurethane waterproof coating, which is different from Example 1 in that the calcium dodecylbenzene sulfonate in component B is replaced by an equal amount of sodium dodecylbenzene sulfonate Disponil LDBS23CN purchased from BASF.

[0061] Performance Testing With reference to GB / T 19250-2013 "Polyurethane Waterproof Coating", the tensile strength (MPa), elongation at break (%), 5°C surface drying time (h), 5°C actual drying time (h) of the two-component polyurethane waterproof coating prepared in this application, and the appearance was observed for cracking and powdering after 2000h of artificial climate xenon lamp aging, and the tensile strength after aging (MPa) was tested, and the change rate of tensile strength after aging (%) was calculated as [(tensile strength-tensile strength after aging) / tensile strength]*100%.

[0062] The above test results are shown in Table 3.

[0063] Table 3: Combined with the analysis of Table 3, it can be seen that the two-component polyurethane waterproof coatings of Examples 1 to 3 all show good performance in terms of tensile strength, elongation at break, surface drying time, actual drying time, appearance change after aging, and tensile strength change rate. It can be seen that the formulas used in Examples 1 to 3 can ensure that the two-component polyurethane waterproof coatings have good construction performance and weather resistance while maintaining excellent physical properties.

[0064] Specifically combined with Example 1 and Comparative Examples 1 to 3, it can be seen that the use of yellowing-resistant epoxy curing accelerator WE-15, polyetheramine curing agent D-230 and epoxy elastic curing agent WE-201AB-2 is crucial to maintaining the anti-aging performance of the two-component polyurethane waterproof coating and shortening the curing time of the two-component polyurethane waterproof coating. It can be seen that the yellowing-resistant epoxy curing accelerator WE-15, polyetheramine curing agent D-230 and epoxy elastic curing agent WE-201AB-2 used in Examples 1 to 3 can not only synergistically improve the weather resistance of the two-component polyurethane waterproof coating, but also ensure the rapid curing of the two-component polyurethane waterproof coating under low temperature conditions. Further combined with Example 1 and Comparative Examples 4 to 6, it can be seen that the use of hydrogenated rosin pentaerythritol ester, octylphenol polyoxyethylene ether phosphate and calcium dodecylbenzene sulfonate also has a significant effect on the anti-aging performance and curing time of the two-component polyurethane waterproof coating.

[0065] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A two-component polyurethane waterproof coating with fast curing speed, characterized in that: The invention comprises component A and component B, wherein component A comprises the following components in percentage by mass: 38% to 42% of polyether polyol, 3% to 6% of diphenylmethane diisocyanate, 6% to 10% of liquid epoxy resin, 36% to 40% of hydrogenated bisphenol A epoxy resin, 3% to 6% of nitrile carboxylic toughened modified epoxy prepolymer, 2% to 4% of hydrogenated rosin pentaerythritol ester, 0.8% to 1% of silane coupling agent, 0.02% to 0.04% of octylphenol polyoxyethylene ether phosphate, 0.01% to 0.03% of defoaming agent and 0.02% to 0.04% of leveling agent; The B component includes the following components in mass percentage: 45% to 55% of yellowing-resistant epoxy curing accelerator WE-15, 8% to 12% of polyetheramine curing agent D-230, 18% to 22% of epoxy elastic curing agent WE-201AB-2, 0.8% to 1.1% of calcium dodecylbenzene sulfonate, 0.03% to 0.05% of octylphenol polyoxyethylene ether phosphate, 8% to 12% of filler and 8% to 10% of anti-settling agent.

2. A two-component polyurethane waterproof coating with a fast curing speed according to claim 1, characterized in that: The component A comprises the following components in percentage by mass: 40.2% polyether polyol, 4.8% diphenylmethane diisocyanate, 8% liquid epoxy resin, 38% hydrogenated bisphenol A epoxy resin, 5% nitrile carboxylic toughened modified epoxy prepolymer, 3% hydrogenated rosin pentaerythritol ester, 0.92% silane coupling agent, 0.03% octylphenol polyoxyethylene ether phosphate, 0.02% defoamer and 0.03% leveling agent; The B component includes the following components in mass percentage: 50% yellowing-resistant epoxy curing accelerator WE-15, 10% polyetheramine curing agent D-230, 20% epoxy elastic curing agent WE-201AB-2, 0.94% calcium dodecylbenzene sulfonate, 0.04% octylphenol polyoxyethylene ether phosphate, 10% filler and 9.02% anti-settling agent.

3. A two-component polyurethane waterproof coating with a fast curing speed according to claim 1, characterized in that: The mass ratio of component A to component B is 1:(1~2).

4. A two-component polyurethane waterproof coating with a fast curing speed according to claim 1, characterized in that: The filler is titanium dioxide.

5. The two-component polyurethane waterproof coating with fast curing speed according to claim 1, characterized in that: The anti-settling agent is silicon dioxide.

6. The two-component polyurethane waterproof coating with fast curing speed according to claim 1, characterized in that: The molecular weight of the polyether polyol is 1000 Daltons.

7. A method for preparing a two-component polyurethane waterproof coating with a fast curing speed, characterized in that: The preparation method of the A component comprises the following steps: Step 1: Add polyether polyol into the reactor and stir at a speed of 500-800 r / min. At the same time, turn on the temperature to raise the temperature to 110°C-120°C, and turn on the vacuum pump to control the vacuum degree between -0.095MPa and -0.01MPa, and vacuum dehydrate for 2-2.5h; Step 2: Cool the material obtained in step 1 to 80-82°C, then slowly add diphenylmethane diisocyanate in portions, and after the addition, react at a constant temperature of 80-85°C for 2-2.5 hours; Step 3: Cool the material obtained in step 2 to 58-60° C., add liquid epoxy resin, hydrogenated bisphenol A epoxy resin, nitrile carboxylic acid toughened modified epoxy prepolymer and hydrogenated rosin pentaerythritol ester into the reaction kettle and stir at a speed of 800-1000 r / min for 20-25 min; Step 4: Add the remaining material to the material obtained in step 3 and continue stirring for 15 to 20 minutes to obtain component A.

8. The method for preparing a two-component polyurethane waterproof coating with a fast curing speed according to claim 7, characterized in that: The preparation method of the B component comprises the following steps: Step s1: adding epoxy curing accelerator, epoxy curing agent, epoxy elastic curing agent, calcium dodecylbenzene sulfonate and octylphenol polyoxyethylene ether phosphate into a dispersion tank, starting stirring, and homogenizing at a speed of 800-1000 r / min for 20-25 min; Step s2: slowly add filler and anti-settling agent to the material obtained in step s1, and after adding, homogenize at a speed of 1000-1500 r / min for 30-35 minutes to obtain component B.

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