Modified emulsified asphalt and preparation method thereof, asphalt waterproof coating and preparation method thereof and application thereof

Abstract

The present application discloses a modified emulsified asphalt and a preparation method thereof, an asphalt waterproof coating and a preparation method and application thereof. A method for preparing a modified emulsified asphalt comprises: mixing materials containing asphalt, filler oil and a modifier at a preset temperature to obtain a modified asphalt rubber; mixing materials containing an emulsifier, an additive and a solvent to obtain a soap solution; mixing the modified asphalt rubber and the soap solution according to a preset ratio to obtain the modified emulsified asphalt; wherein the modifier comprises a tackifying resin and SBS, the filler oil comprises at least one of cyclohexane oil and aromatic oil, and the emulsifier comprises at least one of sodium methyl coconut taurate, sodium cyclohexaneate and sodium laurate. According to an embodiment of the present application, the modified emulsified asphalt has high solid content, excellent low temperature, good initial viscosity and water resistance.

Description

Technical Field

[0001] The present application belongs to the field of building waterproofing, and in particular relates to a modified emulsified asphalt and a preparation method thereof, an asphalt waterproof coating and a preparation method and application thereof. Background Art

[0002] In order to meet the growing housing demand and engineering needs, modern buildings are often characterized by high floors and deep foundation pits. Therefore, various types of buildings have various basements, parking lots, transportation hubs and other structural layers, and side walls and vertical walls more than ten meters high are very common.

[0003] This type of side wall is in direct contact with the groundwater layer and is the key part of waterproofing. However, it is very difficult to achieve a good waterproofing effect due to the narrow and high side walls in the underground area and the difficulty in the construction of supporting roll materials. Summary of the invention

[0004] The embodiments of the present application provide a modified emulsified asphalt and a preparation method thereof, an asphalt waterproof coating and a preparation method and application thereof, which can have high solid content, excellent low temperature properties, good initial viscosity and water resistance.

[0005] In the first aspect, an embodiment of the present application provides a method for preparing a modified emulsified asphalt, comprising: mixing a material containing asphalt, an extender oil and a modifier at a preset temperature to obtain a modified asphalt rubber; mixing a material containing an emulsifier, an additive and a solvent to obtain a soap solution; mixing the modified asphalt rubber and the soap solution according to a preset ratio to obtain a modified emulsified asphalt; wherein the modifier comprises a tackifying resin and SBS, the extender oil comprises at least one of cyclohexane oil and aromatic oil, and the emulsifier comprises at least one of sodium methyl coconut taurate, sodium cyclohexaneate and sodium laurate.

[0006] In any embodiment of the present application, in the step of mixing the material containing the emulsifier, the additive and the solvent, the concentration of the emulsifier in the soap solution is 4.0% to 10.0%.

[0007] In any embodiment of the present application, in the step of mixing the modified asphalt rubber and the soap solution according to a preset ratio, the weight ratio of the modified asphalt rubber and the soap solution is 1:0.8-1.2.

[0008] In any embodiment of the present application, in the step of mixing the material containing asphalt, filler oil and modifier at a preset temperature, the weight percentage of asphalt is 75% to 80%, the weight percentage of filler oil is 5% to 10%, the weight percentage of tackifying resin is 5% to 10%, and the weight percentage of SBS modifier is 2% to 5%.

[0009] In any embodiment of the present application, in the step of mixing the material containing asphalt, filler oil and modifier at a preset temperature, the preset temperature is 100-200°C.

[0010] In any embodiment of the present application, in the step of mixing the material containing the emulsifier, the additive and the solvent, the additive includes at least one of a stabilizer and a pH adjuster, and the solvent includes at least one of water and ethylene glycol.

[0011] In any embodiment of the present application, in the step of mixing the materials containing emulsifier, additive and solvent, the weight percentage of the emulsifier is 4% to 10%, the weight percentage of the stabilizer is 0.5% to 1%, the weight percentage of the pH adjuster is 0.2% to 2.0%, and the weight percentage of the solvent is 90% to 95%.

[0012] In a second aspect, an embodiment of the present application provides a modified emulsified asphalt obtained by the above-mentioned preparation method.

[0013] In the third aspect, an embodiment of the present application provides an asphalt waterproof coating, which includes, by weight percentage: 40% to 50% modified emulsified asphalt, 25% to 35% acrylic emulsion, 20% to 30% filler, and 1.5% to 3.5% additive; the modified emulsified asphalt includes the above-mentioned modified emulsified asphalt.

[0014] In any embodiment of the present application, the auxiliary agent includes at least one of a thickener, a defoaming agent, a pH adjuster and a wetting and dispersing agent.

[0015] In any embodiment of the present application, the filler includes at least one of barium sulfate, aluminum hydroxide and silicon powder.

[0016] In any embodiment of the present application, the thickener includes at least one of A406, hydroxyethyl methylcellulose and hydroxypropyl methylcellulose.

[0017] In any embodiment of the present application, the defoaming agent includes a silicone-based defoaming agent.

[0018] In any embodiment of the present application, the pH adjuster includes at least one of acetic acid, formic acid, hydrochloric acid, aqueous ammonia, an aqueous dimethylamine solution, and an aqueous monomethylamine solution.

[0019] In any embodiment of the present application, the wetting and dispersing agent includes at least one of STA-1618, sodium sulfonate, and sodium sulfate.

[0020] In any embodiment of the present application, the content of the thickener in the asphalt waterproof coating is 0.3% to 1.0% by weight.

[0021] In any embodiment of the present application, the content of the defoaming agent in the asphalt waterproof coating is 0.5% to 1.0% by weight.

[0022] In any embodiment of the present application, the content of the pH regulator in the asphalt waterproof coating is 0.1% to 0.3% by weight.

[0023] In any embodiment of the present application, the content of the wetting and dispersing agent in the asphalt waterproof coating is 0.5% to 1.0% by weight.

[0024] In a fourth aspect, an embodiment of the present application provides a method for preparing an asphalt waterproof coating, comprising: mixing modified emulsified asphalt, acrylic emulsion, filler and additives according to a preset ratio to obtain an asphalt waterproof coating.

[0025] In a fifth aspect, the embodiments of the present application provide the use of the above-mentioned asphalt waterproof coating or the asphalt waterproof coating obtained by the above-mentioned preparation method in the structural layer of a basement, a parking lot or a transportation hub.

[0026] The modified emulsified asphalt and its preparation method, asphalt waterproof coating and its preparation method and application in the embodiments of the present application can modify asphalt through thickening resin, SBS and filler oil to introduce polymers, improve the stability of peel strength and bonding strength after long-term immersion in water, and then emulsify the asphalt with soap solution prepared by a special type of emulsifier, which can ensure that the polymer can be evenly dispersed in the asphalt emulsion and exert the best modification effect, thereby obtaining a modified emulsified asphalt with the advantages of high solid content, good low temperature and high strength, and can enhance bonding strength and peel strength. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present application may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0029] The "range" disclosed in the present application is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present application, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0030] If not otherwise specified, all embodiments and optional embodiments of the present application may be combined with each other to form new technical solutions, and such technical solutions should be deemed to be included in the disclosure of the present application.

[0031] Unless otherwise specified, all technical features and optional technical features of the present application may be combined with each other to form new technical solutions, and such technical solutions should be deemed to be included in the disclosure of the present application.

[0032] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0033] Unless otherwise specified, the raw materials in the examples of this application were purchased through commercial channels.

[0034] Unless otherwise specified, this application adopts conventional test methods or test methods recommended by the instrument.

[0035] Conventional vertical wall and side wall waterproofing construction generally uses coils and coatings. However, the coating is easy to cause the upper part to be thin and the lower part to be thick on the facade, that is, the coating is accumulated at the bottom, resulting in uneven thickness, which affects the waterproofing effect. To solve such problems, the coatings used for vertical walls on the market are mainly water-based anti-slip coatings. This kind of coating has the characteristics of no sagging after being applied to the vertical wall, uniform thickness of the coating from top to bottom after drying, good composite effect with coils, and good waterproofing effect. However, since the Ministry of Housing and Urban-Rural Development issued the General Specification for Waterproofing of Buildings and Municipal Engineering (GB 55030-2022), the requirements for the water resistance of waterproof coatings used in basements (retention rate of coating adhesion strength after immersion in water for 7 days) have become increasingly stringent. The Shenzhen Waterproof Association has also put forward similar water resistance requirements for such products (retention rate of peeling strength between coating and coil after immersion in water for 7 days). At the same time, water-based waterproof coatings contain a lot of water, so they dry very slowly, which seriously affects the construction progress.

[0036] The inventors discovered that by first modifying and emulsifying asphalt with a tackifying resin, SBS, filler oil and a soap solution containing a characteristic type of emulsifier, a modified emulsified asphalt with high solid content, excellent low temperature resistance, good initial viscosity and water resistance is obtained, and then interacting with a special type of filler and a special acrylic resin to obtain a waterproof coating, which can improve the water resistance of the asphalt waterproof coating, while increasing the drying speed and shortening the construction schedule.

[0037] A method for preparing modified emulsified asphalt

[0038] The embodiment of the present application provides a method for preparing modified emulsified asphalt, comprising: S1, mixing materials containing asphalt, filler oil and modifier at a preset temperature to obtain modified asphalt rubber; S2, mixing materials containing emulsifier, additive and solvent to obtain soap solution; S3, mixing the modified asphalt rubber and soap solution according to a preset ratio to obtain modified emulsified asphalt; wherein the modifier comprises a tackifying resin and SBS, the filler oil comprises at least one of cyclohexane oil and aromatic oil, and the emulsifier comprises at least one of sodium methyl coconut taurate, sodium cyclohexaneate and sodium laurate.

[0039] Asphalt is a basic raw material for modified emulsified asphalt. Optionally, the asphalt grade includes at least one of 70#, 90#, 110#, 120#, 150#, 200#, 250# and 300#.

[0040] Optionally, in order to better adapt to the above system, the asphalt can be 70# asphalt.

[0041] The filler oil, also known as base oil or diluent, can significantly reduce the viscosity of asphalt, making it easier to disperse and emulsify asphalt during the emulsification process, and improving the stability and uniformity of the emulsified asphalt. In the embodiment of the present application, in order to better enable the modifier to be more evenly distributed in the asphalt, improve the modification effect, optimize the composition structure of the modified emulsified asphalt, and further improve its water resistance, the filler oil can be cycloparaffinic oil.

[0042] SBS (styrene-butadiene-styrene) can interact with the components in asphalt, introduce polymers, form a stable network structure, enhance the bonding force between emulsified asphalt and aggregates such as stone, and improve the peel strength and bonding strength after long-term immersion in water.

[0043] Soap solution is a special additive, which is mainly composed of emulsifier and water, and is used to help asphalt form a stable emulsion during the emulsification process.

[0044] In the embodiments of the present application, asphalt is emulsified by a soap solution prepared by a special type of emulsifier, which can ensure that the polymer can be evenly dispersed in the asphalt emulsion and exert the best modification effect, thereby obtaining a modified emulsified asphalt having the advantages of high solid content, good low temperature resistance and high strength, and capable of enhancing bonding strength and peel strength.

[0045] In step S1, in order to better obtain modified asphalt rubber, the asphalt can be melted at a first temperature, then stirred at a high speed, and then the filler oil is added and mixed evenly with the molten asphalt at a second temperature and high-speed stirring, and then the modifier is added and stirred at a high speed until the modifier is completely melted to finally obtain the modified asphalt rubber, wherein the first temperature is 110-130°C, the second temperature is 160-200°C, and the speed of high-speed stirring is 180-220rmp / min.

[0046] In step S2, in order to better obtain soap solution, the emulsifier and the solvent can be mixed first, then cooled and refluxed and mechanically stirred, and then the additive is added at a first temperature to obtain soap solution, wherein the mechanical stirring speed is 180 to 220 rpm / min and the first temperature is 55 to 65°C.

[0047] In step S3, in order to better obtain modified emulsified asphalt, the soap solution and the modified asphalt rubber are introduced into the colloid mill at the same flow rate to cause emulsification and modification, thereby obtaining a modified emulsified asphalt having the advantages of high solid content, good low temperature resistance and high strength, and capable of enhancing bonding strength and peel strength.

[0048] In some embodiments, in the step of mixing the materials containing the emulsifier, the additive and the solvent, the concentration of the emulsifier in the soap solution is 4.0% to 10.0%.

[0049] Optionally, the concentration of the emulsifier in the soap solution is independently selected from 4.0%, 4.2%, 4.5%, 4.7%, 5.0%, 5.2%, 5.5%, 5.7%, 6.0%, 6.2%, 6.5%, 6.7%, 7.0%, 7.2%, 7.5%, 7.7%, 8.0%, 8.2%, 8.5%, 8.7%, 9.0%, 9.2%, 9.5%, 9.7%, 10.0% or any range therebetween.

[0050] In some embodiments, in the step of mixing the modified asphalt rubber and the soap solution according to a preset ratio, the weight ratio of the modified asphalt rubber and the soap solution is 1:0.8-1.2.

[0051] Optionally, the weight ratio of the modified asphalt rubber and the soap solution is independently selected from any value of 1:0.8, 1:0.9, 1:1.0, 1:1.1, 1:1.2, or any range between two of them.

[0052] In the embodiments of the present application, the concentration of the emulsifier in the soap solution and the weight ratio of the modified asphalt rubber and the soap solution are within the above range, which can significantly reduce the surface tension of the asphalt, making the asphalt easier to disperse in water and facilitating the modification of the asphalt by the modifier.

[0053] In the embodiments of the present application, the concentration of the emulsifier in the soap solution and the weight ratio of the modified asphalt rubber and the soap solution are within the above range, so that the emulsifier and other additives in the soap solution can help improve the adhesion of the asphalt, thereby improving the bonding strength.

[0054] In the embodiments of the present application, the concentration of the emulsifier in the soap solution and the weight ratio of the modified asphalt rubber and the soap solution are within the above ranges, which can enhance the water resistance of the asphalt and enhance the peeling strength after long-term immersion in water.

[0055] In some embodiments, in the step of mixing the material containing asphalt, filler oil and modifier at a preset temperature, the weight percentage of asphalt is 75% to 80%, the weight percentage of filler oil is 5% to 10%, the weight percentage of tackifying resin is 5% to 10%, and the weight percentage of SBS modifier is 2% to 5%.

[0056] In some embodiments, in the step of mixing the material containing asphalt, filler oil and modifier at a preset temperature, the preset temperature is 100-200°C.

[0057] Optionally, the preset temperature is independently selected from any value of 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, or any range therebetween.

[0058] In the embodiment of the present application, in order to better obtain the modified asphalt rubber, the asphalt can be melted at a first temperature, then stirred at high speed, and then the filler oil is added and mixed evenly with the melted asphalt at a second temperature and high speed stirring. The first temperature and the second temperature are both 100-200°C.

[0059] In some embodiments, in the step of mixing the material containing the emulsifier, the additive and the solvent, the additive includes at least one of a stabilizer and a pH regulator, and the solvent includes at least one of water and ethylene glycol. Adding the stabilizer and the pH regulator to the soap solution can maintain the stability of the soap solution during the preparation and storage process, avoid stratification, precipitation and the like, and ensure the quality of the emulsified asphalt.

[0060] Optionally, the stabilizer includes at least one of aluminum sulfate, a copolymer of diisobutylene and maleic acid, and 2-amino-2-methyl-1-propanol, and the pH adjuster includes at least one of acetic acid, formic acid, hydrochloric acid, ammonia water, a dimethylamine aqueous solution, and a monomethylamine aqueous solution. The specific product of the copolymer of diisobutylene and maleic acid is not limited in any way and can be a commercially available one, for example, a copolymer of diisobutylene and maleic acid having a CAS number of 39612-00-5.

[0061] In some embodiments, in the step of mixing materials containing emulsifiers, additives and solvents, the weight percentage of the emulsifier is 4% to 10%, the weight percentage of the stabilizer is 0.5% to 1%, the weight percentage of the pH adjuster is 0.2% to 2.0%, and the weight percentage of the solvent is 90% to 95%.

[0062] A modified emulsified asphalt

[0063] The embodiment of the present application provides a modified emulsified asphalt obtained by the above-mentioned preparation method.

[0064] Asphalt waterproof coating

[0065] An embodiment of the present application provides an asphalt waterproof coating, which includes, by weight percentage: 40% to 50% modified emulsified asphalt, 25% to 35% acrylic emulsion, 20% to 30% filler, and 1.5% to 3.5% additive; the modified emulsified asphalt includes the above-mentioned modified emulsified asphalt.

[0066] In the embodiments of the present application, modified emulsified asphalt with high solid content, excellent low temperature resistance, good initial viscosity and water resistance, interacts with special types of fillers and special acrylic resins to improve the water resistance of asphalt waterproof coatings, while increasing the drying speed and shortening the construction schedule.

[0067] Acrylic emulsion is an emulsion copolymerized from pure acrylic ester monomers, which is milky white or nearly transparent viscous liquid. In the embodiment of the present application, the acrylic emulsion is purchased from Badfu Group Co., Ltd., model FS-7860-1, which can be well adapted to the anion-modified emulsified asphalt obtained in the first aspect to improve the low temperature and water resistance of the asphalt waterproof coating.

[0068] In the embodiments of the present application, a water-based anti-slip acrylic emulsion is introduced to work together with other components to improve the water resistance of the coating, meet the national standards issued by the Ministry of Housing and Urban-Rural Development and the Shenzhen group standards, and prevent the coating from experiencing a sharp drop in bonding strength and peeling strength with the coil after being immersed in water.

[0069] In some embodiments, the auxiliary agent includes at least one of a thickener, a defoamer, a pH adjuster, and a wetting and dispersing agent.

[0070] Optionally, the thickener includes at least one of A406, hydroxyethyl methylcellulose and hydroxypropyl methylcellulose, and the defoaming agent includes a silicone defoaming agent.

[0071] Optionally, the organosilicon defoamer includes oily organosilicon defoamer, solution-type organosilicon defoamer, emulsion-type organosilicon defoamer and solid-type organosilicon defoamer. Those skilled in the art can select as needed. As an example, the brand of the organosilicon defoamer can be BYK-065, BYK-035 / 037, BYK-066N, BYK-022.

[0072] Optionally, the pH adjuster includes at least one of acetic acid, formic acid, hydrochloric acid, aqueous ammonia, dimethylamine aqueous solution and monomethylamine aqueous solution, and the wetting and dispersing agent includes at least one of STA-1618, sodium sulfonate and sodium sulfate.

[0073] In some embodiments, the content of the thickener in the asphalt waterproof coating is 0.3% to 1.0% by weight.

[0074] In some embodiments, the content of the defoaming agent in the asphalt waterproof coating is 0.5% to 1.0% by weight.

[0075] In some embodiments, the content of the pH adjuster in the asphalt waterproof coating is 0.1% to 0.3% by weight.

[0076] In some embodiments, the content of the wetting and dispersing agent in the asphalt waterproof coating is 0.5% to 1.0% by weight.

[0077] In some embodiments, the filler includes at least one of barium sulfate, aluminum hydroxide, and silica powder.

[0078] In the embodiments of the present application, the solid content of the asphalt waterproof coating can be increased by using fillers within the above range.

[0079] In order to better improve the solid content of asphalt waterproof coating, the filler can be barium sulfate. Barium sulfate has a lower pigment volume concentration (pigment volume concentration (PVC concentration) refers to the ratio of the volume of coloring pigments and body pigments in the coating to the total volume of all non-volatile components in the formula (including emulsion solids, coloring pigments and body pigments), referred to as PVC. PVC = volume of pigments and fillers / (volume of pigments and fillers + volume of solid base material) * 100%), and can add more fillers with less emulsion, and can obtain high-solid coatings. High-solid coatings have the characteristics of less brushing and easy thickness during construction.

[0080] A preparation method of asphalt waterproof coating

[0081] An embodiment of the present application provides a method for preparing an asphalt waterproof coating, comprising: mixing modified emulsified asphalt, acrylic emulsion, filler, thickener, defoamer, pH adjuster and wetting dispersant according to a preset ratio to obtain an asphalt waterproof coating.

[0082] Application of asphalt waterproof coating

[0083] The embodiments of the present application provide the use of the above-mentioned asphalt waterproof coating or the asphalt waterproof coating obtained by the above-mentioned preparation method in the structural layer of a basement, a parking lot or a transportation hub.

[0084] The sources of raw materials disclosed in the examples of this application are as follows:

[0085] 70# asphalt was purchased from Foshan PetroChina Gaofu Petroleum Co., Ltd.

[0086] The cyclohexane oil was purchased from Dongguan Aozirun Lubricating Oil Co., Ltd., model number 4006.

[0087] The tackifying resin was purchased from Jinan Mingrun Chemical Co., Ltd. and the models were C5 / C9 and C5 hydrogenated petroleum resin.

[0088] SBS was purchased from LG Chemical, model number LG501.

[0089] Sodium methyl cocoyl taurate was purchased from Shandong Xinquansheng Chemical Technology Co., Ltd., with a pH value of 6.5-8.0.

[0090] Aluminum sulfate was purchased from Jiangsu Jiaren Chemical Co., Ltd.

[0091] Acrylic emulsion was purchased from Badfu Group Co., Ltd., model FS-7860-1.

[0092] Barium sulfate was purchased from Guangdong Yuanlei Powder Co., Ltd., model number is YL-309.

[0093] The thickener was purchased from Wanhua Chemical Group Co., Ltd., model A406.

[0094] Silicone defoaming agent was purchased from Shandong Ningjing Environmental Protection Technology Co., Ltd.

[0095] The wetting and dispersing agent was purchased from Nanxiong Santuo Chemical Industry Co., Ltd., model STA-1618.

[0096] Ordinary emulsified asphalt was purchased from Foshan Sinopec Gaofu Petroleum Co., Ltd.

[0097] Example

[0098] The following examples describe the disclosure of the present application in more detail, and these examples are only for illustrative purposes, as it is obvious to those skilled in the art that various modifications and variations are made within the scope of the disclosure of the present application. Unless otherwise stated, all parts, percentages, and ratios reported in the following examples are based on mass, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further processing, and the instruments used in the examples are commercially available.

[0099] Example 1

[0100] (1) Preparation of modified emulsified asphalt

[0101] Step 1: Weigh 1700g of 70# asphalt and put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 200g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 200g of tackifier resin and 80g of SBS modifier, add them to the metal can, stir for 2h until the tackifier resin and SBS modifier are completely melted, and then cool to 120℃ after melting to obtain modified asphalt rubber.

[0102] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0103] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain modified emulsified asphalt.

[0104] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0105] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, and then add 1.0g of wetting and dispersing agent.

[0106] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour.

[0107] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of modified emulsified asphalt and continue stirring for 5 minutes.

[0108] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0109] Example 2

[0110] (1) Preparation of modified emulsified asphalt

[0111] Step 1: Weigh 1700g of 70# asphalt, put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 200g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 200g of tackifier resin and 160g of SBS modifier, add them to the metal can, stir for 2 hours until the tackifier resin and SBS modifier are completely melted, and then cool to 120℃ after melting to obtain modified asphalt rubber.

[0112] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0113] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain special modified emulsified asphalt.

[0114] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0115] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, then add 1.0g of wetting and dispersing agent;

[0116] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour;

[0117] Step 3: Add 0.5g of defoamer, stir for 5min, then add 80g of special modified emulsified asphalt, and continue stirring for 5min;

[0118] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0119] Example 3

[0120] (1) Preparation of modified emulsified asphalt

[0121] Step 1: Weigh 1700g of 70# asphalt, put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 200g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 400g of tackifier resin and 80g of SBS modifier, add them to the metal can, stir for 2h until the tackifier resin and SBS modifier are completely melted, and then cool to 120℃ after melting to obtain modified asphalt rubber.

[0122] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0123] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain special modified emulsified asphalt.

[0124] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0125] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, and then add 1.0g of wetting and dispersing agent.

[0126] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour.

[0127] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of modified emulsified asphalt and continue stirring for 5 minutes.

[0128] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0129] Example 4

[0130] (1) Preparation of modified emulsified asphalt

[0131] Step 1: Weigh 1700g of 70# asphalt, put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 400g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 200g of tackifying resin and 160g of SBS modifier, add them to the metal can, stir for 2h until the tackifying resin and SBS modifier are completely melted, and then cool to 120℃ after melting to obtain modified asphalt rubber.

[0132] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0133] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain special modified emulsified asphalt.

[0134] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0135] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, and then add 1.0g of wetting and dispersing agent.

[0136] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour.

[0137] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of modified emulsified asphalt and continue stirring for 5 minutes.

[0138] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0139] Example 5

[0140] (1) Preparation of modified emulsified asphalt

[0141] Step 1: Weigh 1700g of 70# asphalt, put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 400g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 400g of tackifier resin and 160g of SBS modifier, add them to the metal can, stir for 2h until the tackifier resin and SBS modifier are completely melted, and then cool to 120℃ after melting to obtain modified asphalt rubber.

[0142] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0143] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain special modified emulsified asphalt.

[0144] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0145] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, and then add 1.0g of wetting and dispersing agent.

[0146] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour.

[0147] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of modified emulsified asphalt and continue stirring for 5 minutes.

[0148] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0149] Comparative Example 1

[0150] (1) Preparation of modified emulsified asphalt

[0151] Step 1: Weigh 1700g of 70# asphalt, put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 200g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 280g of SBS modifier and add it to the metal can, stir for 2h until the SBS modifier is completely melted, and cool to 120℃ after melting to obtain modified asphalt rubber.

[0152] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0153] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain special modified emulsified asphalt.

[0154] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0155] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, and then add 1.0g of wetting and dispersing agent.

[0156] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour.

[0157] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of modified emulsified asphalt and continue stirring for 5 minutes.

[0158] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0159] Comparative Example 2

[0160] (1) Preparation of modified emulsified asphalt

[0161] Step 1: Weigh 1700g of 70# asphalt, put it into a metal can, heat it to 120℃, wait for the 70# asphalt to melt, turn on the speed to 200rmp / min, and raise the temperature to 180℃, stir for 5min, weigh 200g of cyclohexane oil, add it to the metal can containing asphalt, and continue stirring. After stirring for 10min, weigh 280g of tackifier resin and add it to the metal can, stir for 2h until the tackifier resin is completely melted, and cool to 120℃ after melting to obtain modified asphalt rubber.

[0162] Step 2: Weigh 100 g of sodium methyl cocoyl taurate (emulsifier) ​​into a 5000 ml three-necked flask, measure 2000 ml of deionized water, pour it into the three-necked flask, cool and reflux and stir mechanically at a stirring speed of 200 rpm / min. After the water temperature rises to 60°C, add 10 g of barium sulfate (stabilizer) during stirring, and then add ammonia water (pH adjuster) dropwise with a dropper to adjust the pH to 5-6 to obtain a soap solution.

[0163] Step 3: Pass the soap solution and the modified asphalt rubber into the colloid mill at the same flow rate (weight ratio of 1:1) to obtain special modified emulsified asphalt.

[0164] (2) Preparation of high-performance water-based, high-viscosity, anti-slip asphalt waterproof coating

[0165] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, and then add 1.0g of wetting and dispersing agent.

[0166] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour.

[0167] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of modified emulsified asphalt and continue stirring for 5 minutes.

[0168] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a high-performance water-based anti-skid asphalt waterproof coating.

[0169] Comparative Example 3

[0170] Step 1: Weigh 60g of special acrylic emulsion, start stirring (300rpm / min), add 0.6g of thickener A406 dropwise, stir for 5min, then add 1.0g of wetting and dispersing agent;

[0171] Step 2: After stirring for 5 minutes, add 60g of barium sulfate, increase the stirring speed to 700-800rpm / min, and stir for half an hour;

[0172] Step 3: Add 0.5g of defoamer, stir for 5 minutes, then add 80g of common emulsified asphalt, and continue stirring for 5 minutes;

[0173] Step 4: Add 0.5 g of defoaming agent, stir for 5 minutes, and then perform vacuum stirring to degas the prepared coating to obtain a water-based anti-skid asphalt waterproof coating.

[0174] Comparative Example 4

[0175] The experimental steps are basically the same as those in Example 1, except that in the preparation process of the modified emulsified asphalt, 100 g of sodium methyl cocoyl taurate in step 2 is replaced by 100 g of alkylphenol polyoxyethylene ether.

[0176] Example 6

[0177] The experimental steps are basically the same as those in Example 1, except that in the preparation process of the modified emulsified asphalt, 100 g of sodium methyl cocoyl taurate in step 2 is replaced by 50 g of sodium methyl cocoyl taurate.

[0178] Example 7

[0179] The experimental steps are basically the same as those in Example 1, with the only difference being that in the preparation process of the asphalt waterproof coating, the special acrylic emulsion in step 1 is replaced with the Baolijia LBJ-718 emulsion.

[0180] Example 8

[0181] The experimental steps are basically the same as those in Example 1, with the only difference being that in the preparation process of the asphalt waterproof coating, the barium sulfate in step 2 is replaced by aluminum hydroxide.

[0182] Data Analysis:

[0183] The asphalt waterproof coatings in Examples 1-8 and Comparative Examples 1-4 were tested for performance, and the testing method was as follows:

[0184] Viscosity: Measured according to GB / T 269-2005 “Test methods for asphalt”.

[0185] Solid content: measured using the test method for the evaporation residue content of emulsified asphalt (T0651-1993) specified in the "Test Procedure for Asphalt and Asphalt Mixtures for Highway Engineering" (JTG E20-2011).

[0186] Low temperature flexibility: GB / T 328.14-2007 "Test methods for building waterproofing membranes Part 14: Low temperature flexibility of bitumen waterproofing membranes" is used for measurement.

[0187] Adhesion strength: measured according to GB / T 9286-1998 Waterproof coating.

[0188] Elongation at break: in accordance with 5.12 of JC / T 408-2005.

[0189] Bond strength retention after 7 days of immersion: in accordance with 6.3 of T / CWA 302-2023.

[0190] Peel strength retention rate of SBS membrane after immersion in water for 7 days: in accordance with Appendix B of T / SZWA 006-2021.

[0191] The test results are shown in Table 1.

[0192] Table 1: Composition and properties of water-based anti-skid asphalt waterproof coatings in Examples 1-8 and Comparative Examples 1-4

[0193]

[0194]

[0195] From the test results in Table 1, it can be seen that Examples 1-8 all meet the requirements of JC / T 408-2005 water-emulsified asphalt waterproof coating, national standard (GB 55030-2022) and Shenzhen group standard (T / SZWA 006-2021) for the water resistance of basement coatings, providing a guarantee for the performance after subsequent coiled material construction. Among them, the performance of the waterproof coating of Example 1 is the best.

[0196] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. An asphalt waterproof coating, characterized in that: In terms of weight percentage, it includes: Modified emulsified asphalt 40%~50% Acrylic emulsion 25%~35% Filler 20%~30% Additives 1.5%~3.5%; The preparation method of the modified emulsified asphalt comprises: The material containing asphalt, filler oil and modifier is mixed at a preset temperature to obtain a modified asphalt rubber, wherein the modifier includes a tackifying resin and SBS, the filler oil is selected from cyclohexane oil, and the emulsifier is selected from sodium methyl cocoyl taurate; The weight percentage of the asphalt is 75% to 80%, the weight percentage of the filler oil is 5% to 10%, the weight percentage of the tackifying resin is 5% to 10%, and the weight percentage of the SBS is 2% to 5%; Mixing materials containing an emulsifier, an additive and a solvent to obtain a soap solution, wherein the weight percentage of the emulsifier in the soap solution is 4.0% to 10.0%; The modified asphalt rubber and the soap solution are mixed according to a preset ratio to obtain the modified emulsified asphalt, and the weight ratio of the modified asphalt rubber and the soap solution is 1:0.8~1.

2.

2. The asphalt waterproof coating according to claim 1, characterized in that: In the step of mixing the material containing asphalt, filler oil and modifier at a preset temperature, the preset temperature is 100-200°C.

3. The asphalt waterproof coating according to claim 1, characterized in that: In the step of mixing the material containing the emulsifier, the additive and the solvent, the additive includes at least one of a stabilizer and a pH adjuster, and the solvent includes at least one of water and ethylene glycol.

4. The asphalt waterproof coating according to claim 3, characterized in that: The weight percentage of the stabilizer is 0.5% to 1%, the weight percentage of the pH adjuster is 0.2% to 2.0%, and the weight percentage of the solvent is 90% to 95%.

5. The asphalt waterproof coating according to claim 1, characterized in that: The auxiliary agent includes at least one of a thickener, a defoamer, a pH adjuster and a wetting and dispersing agent.

6. The asphalt waterproof coating according to claim 1, characterized in that: The filler includes at least one of barium sulfate, aluminum hydroxide and silicon powder.

7. The asphalt waterproof coating according to claim 5, characterized in that: The thickener includes at least one of A406, hydroxyethyl methylcellulose and hydroxypropyl methylcellulose, the defoamer includes a silicone defoamer, the pH adjuster includes at least one of acetic acid, formic acid, hydrochloric acid, ammonia water, dimethylamine aqueous solution and monomethylamine aqueous solution, and the wetting and dispersing agent includes at least one of STA-1618, sodium sulfonate and sodium sulfate.

8. The asphalt waterproof coating according to claim 5, characterized in that: In percentage by weight, the content of the thickener in the asphalt waterproof coating is 0.3%~1.0%, the content of the defoamer in the asphalt waterproof coating is 0.5%~1.0%, the content of the pH adjuster in the asphalt waterproof coating is 0.1%~0.3%, and the content of the wetting and dispersing agent in the asphalt waterproof coating is 0.5%~1.0%.

9. A method for preparing the asphalt waterproof coating according to any one of claims 1 to 8, characterized in that: include: The modified emulsified asphalt, acrylic emulsion, filler and additive are mixed according to a preset ratio to obtain the asphalt waterproof coating.

10. Use of the asphalt waterproof coating according to any one of claims 1 to 8 or the asphalt waterproof coating obtained by the preparation method according to claim 9 in the structural layer of a basement, a parking lot or a transportation hub.

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