A high-viscosity and anti-water-skiing rubber asphalt waterproof coating and its preparation method and waterproof laminate

Abstract

The present invention relates to a high-viscosity and anti-water-skidding rubber asphalt waterproof coating, a preparation method thereof and a waterproof laminate, wherein the high-viscosity and anti-water-skidding rubber asphalt waterproof coating comprises a modified asphalt emulsion, a VAE emulsion, a cross-linkable anionic polymer emulsion, an aqueous tackifying emulsion, an aqueous cross-linking agent, a catalyst, other additives and water, wherein the modified asphalt in the modified asphalt emulsion is an EVA resin and an aromatic oil modified asphalt. The present invention improves the cohesion and adhesion of asphalt colloid particles in situ by using EVA resin and aromatic oil modified asphalt with a high aromatic content, and further improves the adhesion performance of the coating to the base layer and the modified asphalt coil by compounding the above-mentioned modified asphalt emulsion with a VAE emulsion, a cross-linkable anionic polymer emulsion and an aqueous tackifying resin emulsion, and at the same time, cooperates with other components to greatly improve the adhesion performance and water resistance of the coating to the substrate. The high-viscosity and anti-water-skidding rubber asphalt waterproof coating of the present invention has excellent storage stability and is safe and environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of waterproof building materials, and in particular relates to a high-viscosity and anti-water-skid rubber asphalt waterproof coating, a preparation method thereof, and a waterproof laminate. Background Art

[0002] With the continuous development of waterproof materials and technologies, "membrane + coating" composite waterproof layers have been widely used in the waterproofing of buildings and structures. In particular, modified asphalt waterproof membranes and non-curing rubber asphalt waterproof coatings use similar raw materials and have good system compatibility. They have been widely praised in recent years and have developed rapidly.

[0003] However, for the waterproofing of the facade (or side wall) of the underground space, the asphalt membrane + non-curing composite waterproof layer has the following problems: (1) Non-curing coatings generally require high-temperature construction, high energy consumption, and strong odor. The high-altitude construction of facade or side wall waterproofing using non-curing composite membranes is difficult; (2) Non-curing coatings have low cohesive force, and the bonding strength between the asphalt membrane and the base layer is insufficient. Under the shear action of earth settlement, it is easy to slip or even fall off, resulting in failure of the waterproof layer.

[0004] In addition, in practice, JS waterproof coatings, polyurethane waterproof coatings or water-based rubber asphalt waterproof coatings are also used to form a composite waterproof layer with asphalt membranes. However, JS waterproof coatings or polyurethane waterproof coatings have poor compatibility with asphalt membranes and are prone to bonding failure in long-term application environments. Although ordinary water-based rubber waterproof coatings have good compatibility and adhesion with asphalt membranes, the coatings have insufficient cohesion and adhesion, resulting in insufficient peeling performance with the base layer and waterproof membranes. When used in combination with modified asphalt waterproof membranes, there is a risk of membrane slippage and falling off. In addition, ordinary water-based rubber asphalt waterproof coatings also have the problem of insufficient water resistance. After long-term immersion in water, the physical properties and waterproof properties of the coating will be severely attenuated, and it is prone to bulging, size increase, and separation from the base layer. It cannot meet the use requirements of long-term immersion or humid environments (such as basements, tunnels, pipe corridors, culverts, etc.).

[0005] Therefore, it has become an urgent task to develop a safe, environmentally friendly, highly cohesive, highly adhesive, and water-resistant rubber asphalt waterproof coating product that can be used for waterproofing construction of underground spaces, especially underground side walls, and used in combination with asphalt waterproofing membranes to form a "roll coating" composite waterproof layer to achieve a first-level waterproof grade. Summary of the invention

[0006] In order to overcome the problems of low cohesion, poor adhesion, insufficient peeling performance with coiled materials and base layers, poor water resistance, etc. in existing water-based rubber asphalt waterproof coatings, the present invention provides a high-viscosity and anti-water-skid rubber asphalt waterproof coating product. The high-viscosity and anti-water-skid rubber asphalt waterproof coating not only has good cohesion and adhesion, and high peeling strength with base layers and asphalt coiled materials, but also has excellent water resistance. The water absorption index is comparable to that of oily polyurethane products. The bonding strength retention rate and peeling strength retention rate after immersion in water are both greater than 90%. It can form a "coil coating" composite waterproof layer with modified asphalt coiled materials, and is suitable for facade waterproofing projects in underground spaces or for replacing non-curing waterproof projects for flat surfaces.

[0007] The present invention also provides a method for preparing the above-mentioned high-viscosity and anti-water-skid rubber asphalt waterproof coating and a waterproof laminate prepared using the waterproof coating.

[0008] The present invention also provides an application of the above-mentioned high-viscosity and anti-water-skid rubber asphalt waterproof coating in the flat surface or underground facade waterproofing of buildings or structures, and in a composite waterproofing system formed with an asphalt-based waterproofing membrane.

[0009] In order to achieve the above objectives, the technical solutions adopted are:

[0010] A high-viscosity and anti-water-skid rubber asphalt waterproof coating, wherein the raw materials of the high-viscosity and anti-water-skid rubber asphalt waterproof coating include the following components in terms of mass percentage:

[0011] Modified asphalt emulsion 40% to 70%;

[0012] Vinyl acetate-ethylene copolymer emulsion 5% to 15%;

[0013] Cross-linkable anionic polymer emulsion 5% to 20%;

[0014] Aqueous thickening emulsion 5% to 20%;

[0015] Water-based crosslinking agent 1% to 5%;

[0016] Catalyst 0.1% to 5%;

[0017] Other additives 0.1% to 5%;

[0018] Water 5% to 15%,

[0019] Wherein, the modified asphalt in the modified asphalt emulsion is EVA resin and aromatic oil modified asphalt, and the solid content of the modified asphalt emulsion is 50% to 70%;

[0020] The solid content of the vinyl acetate-ethylene copolymer emulsion is 50% to 65%;

[0021] The solid content of the cross-linkable anionic polymer emulsion is 35% to 50%;

[0022] The solid content of the aqueous thickening emulsion is 45% to 60%.

[0023] Preferably, the raw materials of the high-viscosity anti-water-skid rubber asphalt waterproof coating include the following components in terms of mass percentage:

[0024] Modified asphalt emulsion 45% to 65%;

[0025] Vinyl acetate-ethylene copolymer emulsion 5% to 10%;

[0026] Cross-linkable anionic polymer emulsion 5% to 15%;

[0027] Aqueous thickening emulsion 5% to 15%;

[0028] Water-based crosslinking agent 1% to 3%;

[0029] Catalyst 0.1%~1%;

[0030] Other additives 0.2%~2%;

[0031] Water 5%~10%.

[0032] Preferably, the modified asphalt emulsion is composed of the modified asphalt and soap solution, the modified asphalt is composed of asphalt, EVA resin and aromatic oil, the mass ratio of the asphalt to the aromatic oil is (8-15):1, and the content of the EVA resin is 3%-6% of the sum of the mass of the asphalt and the aromatic oil; the soap solution includes 5%-10% of anionic emulsifier accounting for its total mass, and 0.1%-0.5% of stabilizer accounting for its total mass.

[0033] Further preferably, the asphalt is one or more of 50# asphalt, 70# asphalt, 90# asphalt, and 110# asphalt.

[0034] Further preferably, the molecular weight of the EVA resin is 20,000 to 100,000, and the VA content is 28 to 40 wt%.

[0035] Further preferably, the kinematic viscosity of the aromatic oil at 100° C. is 5 to 50 mm 2 / s, aromatic content ≥90%.

[0036] Further preferably, the pH value of the soap solution is 10-12, and the pH adjuster used to adjust the pH value of the soap solution is one or more of AMP-95, sodium hydroxide, and ammonia water.

[0037] More preferably, the anionic emulsifier is one or more of an alkylbenzene sulfonate emulsifier, an alkyl sulfonate emulsifier, and a lignin sulfonate emulsifier.

[0038] More preferably, the stabilizer is one or more of sodium carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and polyvinyl alcohol.

[0039] Preferably, the cross-linkable anionic polymer emulsion described in the present invention includes but is not limited to anionic acrylic emulsions, anionic styrene acrylic emulsions, and anionic silicone acrylic emulsions containing carboxylic acid groups.

[0040] Preferably, the softening point of the aqueous thickening emulsion described in the present invention is 80-90° C., and the viscosity is 50-150 mPa·s.

[0041] Preferably, the aqueous crosslinking agent is an aqueous epoxysilane crosslinking agent that can react with carboxylic acid groups and can undergo hydrolysis and polycondensation crosslinking reactions with siloxane groups.

[0042] Preferably, the catalyst is a 2-ethyl-4-methylimidazole catalyst which can promote the reaction between epoxy groups and carboxylic acid groups.

[0043] Preferably, the other auxiliary agents include one or more of a defoaming agent, a preservative, a pH regulator, and a hydrophobically modified thickener.

[0044] Preferably, the other additives include 0.1% to 0.3% of the defoaming agent based on the total mass of the raw materials of the high-viscosity and anti-water-skiing rubber asphalt waterproof coating, 0.1% to 0.3% of the preservative based on the total mass of the raw materials of the high-viscosity and anti-water-skiing rubber asphalt waterproof coating, and 0.1% to 2.5% of the hydrophobic modified thickener based on the total mass of the raw materials of the high-viscosity and anti-water-skiing rubber asphalt waterproof coating.

[0045] Further preferably, the defoaming agent is one or more of a mineral oil defoaming agent, a silicone defoaming agent, a polyether defoaming agent, and a polysiloxane defoaming agent.

[0046] Further preferably, the preservative is one or more of isothiazolinone preservatives, formaldehyde-releasing preservatives, benzisothiazoline preservatives, and s-triazine preservatives.

[0047] More preferably, the hydrophobically modified thickener is one or more of a hydrophobically modified alkali-swellable thickener, a hydrophobically modified alkali-swellable associative thickener, and a hydrophobically modified polyurethane thickener.

[0048] Preferably, the preparation method specifically comprises the following steps:

[0049] (1) mixing a modified asphalt emulsion, a vinyl acetate-ethylene copolymer emulsion, a cross-linkable anionic polymer emulsion and an aqueous tackifying emulsion, and stirring them uniformly at room temperature;

[0050] (2) adding defoamer and bactericide in sequence, stirring evenly at room temperature, and using pH adjuster to maintain the pH value of the system in the range of 8 to 10;

[0051] (3) adding an aqueous crosslinking agent and a catalyst in sequence and stirring evenly at room temperature;

[0052] (4) Add a thickener and use a pH adjuster to maintain the pH value of the system within the range of 8 to 10, stir evenly, divide into packaging containers, and place at 50 to 70° C. to react for 24 to 48 hours.

[0053] Preferably, the preparation method of the modified asphalt emulsion comprises the following steps:

[0054] (a) heating asphalt and aromatic oil to 130-140° C. and stirring uniformly to obtain a mixture I;

[0055] (b) mixing the EVA resin with the mixture I, raising the temperature to 160-180° C., shearing and stirring until the EVA resin is completely dissolved, and cooling to 130-160° C. to obtain a mixture II;

[0056] (c) mixing an anionic emulsifier, a stabilizer and water to prepare a soap solution, adjusting the pH value of the soap solution to 10 to 12, and controlling the temperature of the soap solution to 30 to 80° C. to obtain a mixture III;

[0057] (d) Mixture II and mixture III are mixed by an emulsified asphalt colloid mill, and the discharged materials are cooled to obtain the modified asphalt emulsion.

[0058] The present invention also provides a waterproof laminate, which comprises a base layer, a waterproof coating layer and an asphalt waterproof coiled material layer, wherein the waterproof coating layer is formed by the above-mentioned high-viscosity and anti-water-skid rubber asphalt waterproof coating.

[0059] The waterproof laminate of the present invention comprises a substrate layer, a waterproof coating layer, and an asphalt-based waterproof coiled material layer. The waterproof coating layer is formed by the high-viscosity and anti-water-skid rubber asphalt waterproof coating of the present invention, wherein the waterproof coating layer has excellent water resistance, and its water absorption index is comparable to that of oily polyurethane products. The bonding strength retention rate and the peeling strength retention rate after immersion in water are both greater than 90%, making it capable of meeting the requirements of use in long-term immersion or humid environments such as underground buildings, pipeline corridors, tunnels, and culverts.

[0060] Preferably, the waterproof coating is formed by coating the above-mentioned high-viscosity and anti-water-skid rubber asphalt waterproof coating on a base layer.

[0061] Furthermore, the waterproof laminate is prepared by bonding an asphalt-based waterproof membrane to the waterproof coating.

[0062] Preferably, the asphalt-based waterproofing membrane is selected from SBS waterproofing membrane or APP waterproofing membrane. The surfaces of these two types of waterproofing membranes do not have a separation film and need to be bonded to the waterproof coating on the substrate layer by heating with fire.

[0063] Furthermore, the waterproof laminate is prepared by removing the isolation membrane of the asphalt-based waterproof membrane and then bonding it to the waterproof coating.

[0064] Preferably, the asphalt-based waterproofing membrane is selected from wet-laid waterproofing membrane or self-adhesive polymer-modified asphalt waterproofing membrane. The surfaces of these two types of waterproofing membranes have an isolation membrane, which needs to be removed to expose the bonding layer therein, and then bonded to the waterproof coating on the base layer.

[0065] Furthermore, the base layer is a building surface.

[0066] Further preferably, the building surface is a roof or a basement side wall.

[0067] In some embodiments of the present invention, a high-viscosity and anti-water-skid rubber asphalt waterproof coating is first coated on a base layer, and after the water therein evaporates and dries to form a waterproof coating, an asphalt-based waterproof membrane layer is bonded to the waterproof coating, thereby preparing a waterproof building.

[0068] The present invention also provides an application of the above-mentioned high-viscosity and anti-water-skid rubber asphalt waterproof coating in the flat surface or underground facade waterproofing of buildings or structures, and in a composite waterproofing system formed with an asphalt-based waterproofing membrane.

[0069] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0070] The high-viscosity and anti-water-skid rubber asphalt waterproof coating of the present invention adopts EVA resin and aromatic oil modified asphalt with high aromatic content to prepare modified asphalt emulsion. Due to the reinforcing effect and pressure sensitivity of the EVA resin, the cohesion and adhesion of asphalt colloid particles can be improved in situ.

[0071] The high-viscosity and anti-water-skid rubber asphalt waterproof coating of the present invention is further compounded with VAE emulsion and water-based tackifying emulsion and modified asphalt emulsion. Due to the good adhesion of water-based tackifying resin and VAE emulsion, the adhesion performance between the coating and the base layer and the modified asphalt coil is further improved.

[0072] The epoxy group in the water-based epoxy silane crosslinking agent used in the high-viscosity and anti-water-skid rubber asphalt waterproof coating of the present invention reacts with the hydrophilic group carboxyl group in polymers such as EVA resin, VAE emulsion, anionic acrylic emulsion, anionic styrene acrylic emulsion, and anionic silicone acrylic emulsion containing carboxylic acid groups; the silane alkoxyl group undergoes hydrolysis and condensation reaction to form siloxane bond crosslinking and reacts with the concrete base layer, thereby greatly improving the adhesion and water resistance of the coating film to the substrate.

[0073] Since the hydrolysis condensation crosslinking reaction of silane alkoxy groups requires a certain temperature to proceed, the water-based system with the addition of water-based epoxy silane crosslinking agent has good controllability and a long application period, which can reach one year at room temperature. Therefore, it can be formulated into a stable single-component coating, which is a feature that isocyanate, aziridine and amine crosslinking agents do not have.

[0074] Furthermore, since the amount of water-based crosslinking agent added is small, the activity of the reaction between the epoxy group and the hydrophilic group carboxyl group and the hydrolysis condensation reaction of the silaneoxy group is weak. The present invention proposes adding a 2-ethyl-4-methylimidazole catalyst to catalyze the reaction between the epoxy group and the carboxyl group in the polymer, and grafting the water-based crosslinking agent onto the polymer emulsion molecules; using an appropriate pH value (pH=8-10) and temperature (60-70°C) to promote the hydrolysis condensation crosslinking reaction of the silaneoxy group in the grafted macromolecule, and finally forming a product with a certain degree of crosslinking, thereby improving the physical properties and water resistance of the product.

[0075] The high-viscosity anti-water-skidding rubber asphalt waterproof coating of the present invention can not only be applied thickly on the vertical surface (1.5mm thick) without sagging, but also has excellent high and low temperature performance (heat resistance of 110°C and low temperature resistance of -15°C), excellent elongation performance (elongation at break>1000%) and physical indicators such as aging resistance, and has excellent water resistance, and the water absorption index is comparable to that of oily polyurethane products. The bonding strength retention rate and peeling strength retention rate after immersion in water are both greater than 90%, meeting the use requirements under long-term immersion or humid environments (such as basements, tunnels, pipe galleries, culverts, etc.). In addition, the high-viscosity anti-water-skidding rubber asphalt waterproof coating of the present invention has excellent storage stability and is safe and environmentally friendly. DETAILED DESCRIPTION

[0076] The technical solution of the present invention is described in detail below in conjunction with specific embodiments so that those skilled in the art can better understand and implement the technical solution of the present invention, but the present invention is not limited to the scope of the examples.

[0077] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0078] In the following examples and comparative examples, the room temperature may be in the range of 10 to 30°C.

[0079] In the following examples and comparative examples, the raw materials involved are commercially available products, and the product information is as follows:

[0080] Anionic emulsifier: Jiangsu Jinyang New Materials JY-AFF1;

[0081] Stabilizer: American Aqualon HBR250;

[0082] 70# asphalt: Jingbo Petrochemical "Haiyun";

[0083] Aromatic oil with high aromatic content: Shandong Furunda FSJCY-II, aromatic content ≥ 96%;

[0084] EVA resin: DuPont EVA 250;

[0085] VAE emulsion: Celanese 1350;

[0086] Cross-linkable anionic polymer emulsion: Huaxia Blue New Material HXL-2000;

[0087] Water-based thickening emulsion: Anhui Zhongen Chemical TK-1003;

[0088] Defoaming agent: Shanghai Hangsen 2410;

[0089] Fungicide: Guangzhou Rongyu Chemical RY-7;

[0090] Water-based crosslinker: Wuhan Kemik 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane;

[0091] Catalyst: Nanjing Lanbian 2-ethyl-4-methylimidazole;

[0092] Hydrophobic modified thickener: Guangzhou Angdi Chemical AD-30.

[0093] Example 1

[0094] This embodiment provides a high-viscosity anti-water-skiing rubber asphalt waterproof coating, the corresponding raw material composition is shown in Table 1, and the preparation method is as follows:

[0095] Preparation of EVA modified asphalt emulsion:

[0096] Mix 70# asphalt and aromatic oil with high aromatic content in a mass ratio of 11:1 and heat to 135°C, add 4.0% EVA resin of the mass of the sum of 70# asphalt and aromatic oil with high aromatic content, heat to 175°C and stir for 2.5 hours to obtain modified asphalt for use; mix anionic emulsifier, stabilizer and water in a mass ratio of 3:0.1:37 to prepare soap solution, adjust the pH value of the soap solution to 11 with a 10% NaOH aqueous solution, and heat to 50°C for use; the heated modified asphalt and soap solution are simultaneously passed through a colloid mill in a mass ratio of 3:2 to prepare a modified asphalt emulsion with stable performance.

[0097] Preparation of high-viscosity and anti-water-skiing rubber asphalt waterproof coating:

[0098] According to the formula in Table 1, the modified asphalt emulsion, vinyl acetate-ethylene copolymer emulsion (VAE emulsion), cross-linkable anionic polymer emulsion and aqueous thickening emulsion are first mixed and stirred at room temperature; then the defoamer and bactericide are added in sequence, stirred at room temperature, and a 10% NaOH aqueous solution is used to maintain the pH value of the system within the range of 8 to 10; then the aqueous cross-linking agent and catalyst are added in sequence, and stirred at room temperature; then the hydrophobic modified thickener is slowly added, and a 10% NaOH aqueous solution is added to ensure that the pH value of the system is within the range of 8 to 10, and after stirring, the mixture is divided into 50 kg plastic barrels; finally, the plastic barrels are placed in a 60°C insulation room for reaction for 48 hours to obtain a high-viscosity and anti-water-skid rubber asphalt waterproof coating.

[0099] Example 2

[0100] This embodiment provides a high-viscosity and anti-water-skiing rubber asphalt waterproof coating, and its raw material components are basically the same as those in Example 1, except that the proportion of the raw material components is slightly different, as shown in Table 1. Its preparation method is the same as that in Example 1.

[0101] Example 3

[0102] This embodiment provides a high-viscosity and anti-water-skiing rubber asphalt waterproof coating, and its raw material components are basically the same as those in Example 1, except that the proportion of the raw material components is slightly different, as shown in Table 1. Its preparation method is the same as that in Example 1.

[0103] Comparative Example 1

[0104] This comparative example provides a high-viscosity and anti-water-skid rubber asphalt waterproof coating, whose raw material components are basically the same as those in Example 1, except that no water-based crosslinking agent is used and the amounts of other raw material components are slightly adjusted, as shown in Table 1. Its preparation method is basically the same as that in Example 1, except that no water-based crosslinking agent is added.

[0105] Comparative Example 2

[0106] This comparative example provides a high-viscosity and anti-water-skiing rubber asphalt waterproof coating, whose raw material components are basically the same as those in Example 1, except that no catalyst is used and the amounts of other raw material components are slightly adjusted, as shown in Table 1. Its preparation method is basically the same as that in Example 1, except that no catalyst is added.

[0107] Comparative Example 3

[0108] This comparative example provides a high-viscosity and anti-water-skiing rubber asphalt waterproof coating, whose raw material components are basically the same as those in Example 1, except that VAE emulsion is not used and the amounts of other raw material components are slightly adjusted, as shown in Table 1. Its preparation method is basically the same as that in Example 1, except that VAE emulsion is not added.

[0109] Comparative Example 4

[0110] This comparative example provides a high-viscosity and anti-water-skiing rubber asphalt waterproof coating, whose raw material components are basically the same as those in Example 1, except that the raw material component ratios are different, as shown in Table 1. Its preparation method is the same as that in Example 1.

[0111] Table 1 Raw material composition of high-viscosity anti-water-skid rubber asphalt waterproof coating of each embodiment and comparative example Unit: wt%

[0112]

[0113]

[0114] Performance test experimental data:

[0115] 1. Performance test of high-viscosity and anti-water-skiing rubber asphalt waterproof coatings of various embodiments and comparative examples.

[0116] 1) According to the standards Q320584PBT028-2021 "High Viscosity Anti-Water-Skid Rubber Asphalt Waterproof Coating" and GBT16777-2008 "Test Methods for Building Waterproof Coatings", the high viscosity anti-water-skid rubber asphalt waterproof coatings of each embodiment and comparative example were tested for relevant indicators. The test results are shown in Table 2:

[0117] Table 2 Performance test results of high viscosity and anti-hydroskid rubber asphalt waterproof coating

[0118]

[0119] From the test results in Table 2, it can be seen that the high-viscosity and anti-water-skid rubber asphalt waterproof coating of the embodiment has excellent physical properties, especially the peel strength index, and is suitable for use in combination with a roll material to form a "coated roll" composite waterproof system.

[0120] In addition, the high-viscosity and anti-water-skiing rubber asphalt waterproof coatings of each embodiment were stored in a sealed state at room temperature for 6 months without any undesirable phenomena such as demulsification, gelation, and agglomeration, and had excellent storage stability.

[0121] 2. Water resistance test of the high-viscosity and anti-hydroskid rubber asphalt waterproof coating of each embodiment and comparative example.

[0122] The water absorption performance index is tested according to the method 6.15 in GBT 19250-2013 "Polyurethane Waterproof Coatings"; the bonding strength retention performance index is tested according to the method 7.6.2.4 in GBT 23445-2009 "Polymer Cement Waterproof Coatings". The samples are immersed in water at a temperature of 23±2℃. After the prescribed time, the samples are taken out of the water and wiped dry, and the performance test is immediately carried out; the peel strength retention performance index is tested according to the method 7.14 in the standard Q320584PBT028-2021 "High Viscosity Anti-Skid Rubber Asphalt Waterproof Coatings", and wax-sealed according to the method 7.6.2.4 in GBT 23445-2009 "Polymer Cement Waterproof Coatings", and then immersed in water at a temperature of 23±2℃. After the prescribed time, the samples are taken out of the water and wiped dry, and the performance test is immediately carried out. The test results are shown in Tables 3 and 4:

[0123] Table 3 Water absorption test results of high viscosity anti-water skidding rubber asphalt waterproof coating

[0124]

[0125] Table 4 Performance test results of high viscosity anti-hydroskid rubber asphalt waterproof coating after immersion in water

[0126] index Adhesive strength retention rate after 7 days of immersion in water (%) Retention rate of peel strength after 7 days of immersion in water (%) Example 1 92 92 Example 2 100 96 Example 3 95 93 Comparative Example 1 63 55 Comparative Example 2 72 68 Comparative Example 3 65 63 Comparative Example 4 60 55

[0127] It can be seen from Table 3 and Table 4 that the water resistance of the example product is significantly better than that of the comparative example, and the water resistance of the example can meet the standard requirements of oily polyurethane products.

[0128] 3. Pest control limit test of high viscosity and anti-water skidding rubber asphalt waterproof coatings of various embodiments and comparative examples.

[0129] The harmful substance limit test is in accordance with the test method in JC1066-2008 "Limits of harmful substances in building waterproof coatings". The test results are shown in Table 5:

[0130] Table 5 Test results of harmful substances limit of products

[0131]

[0132]

[0133] It can be seen from Table 5 that the product of the present invention has very few volatile harmful substances and is absolutely safe and environmentally friendly.

[0134] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-viscosity and anti-water-skiing rubber asphalt waterproof coating, It is characterized in that The raw materials of the high-viscosity anti-water-skid rubber asphalt waterproof coating include the following components in terms of mass percentage: Modified asphalt emulsion 45% to 65%; Vinyl acetate-ethylene copolymer emulsion 5% to 10%; Cross-linkable anionic polymer emulsion 5% to 15%; Aqueous thickening emulsion 5% to 15%; Water-based crosslinking agent 1% to 3%; Catalyst 0.1%~1%; Other additives 0.2%~2%; Water 5% to 10%, The modified asphalt in the modified asphalt emulsion is EVA resin and aromatic oil modified asphalt, the solid content of the modified asphalt emulsion is 50% to 70%, the modified asphalt emulsion is composed of the modified asphalt and soap solution, the modified asphalt is composed of asphalt, EVA resin and aromatic oil, the mass ratio of the asphalt to the aromatic oil is (8 to 15): 1, and the content of the EVA resin is 3% to 6% of the sum of the mass of the asphalt and the aromatic oil; the soap solution includes an anionic emulsifier accounting for 5% to 10% of its total mass and a stabilizer accounting for 0.1% to 0.5% of its total mass; The solid content of the vinyl acetate-ethylene copolymer emulsion is 50% to 65%; The solid content of the cross-linkable anionic polymer emulsion is 35% to 50%; The solid content of the aqueous thickening emulsion is 45% to 60%; The water-based crosslinking agent is a water-based epoxysilane crosslinking agent; The catalyst is 2-ethyl-4-methylimidazole.

2. The high-viscosity anti-water-skiing rubber asphalt waterproof coating according to claim 1, It is characterized in that The asphalt is one or more of 50# asphalt, 70# asphalt, 90# asphalt, and 110# asphalt; And / or, the molecular weight of the EVA resin is 20000-100000, and the VA content is 28-40wt%; And / or, the kinematic viscosity of the aromatic oil at 100°C is 5 to 50 mm 2 / s, aromatic content ≥90%; And / or, the pH value of the soap solution is 10-12, and the pH adjuster used to adjust the pH value of the soap solution is one or more of AMP-95, sodium hydroxide, and ammonia water; And / or, the anionic emulsifier is one or more of an alkylbenzene sulfonate emulsifier, an alkyl sulfonate emulsifier, and a lignin sulfonate emulsifier; And / or, the stabilizer is one or more of sodium carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and polyvinyl alcohol.

3. The high-viscosity and anti-water-skid rubber asphalt waterproof coating according to claim 1, It is characterized in that The cross-linkable anionic polymer emulsion is one or more of anionic acrylic emulsion, anionic styrene acrylic emulsion, and anionic silicone acrylic emulsion containing carboxylic acid groups; And / or, the other auxiliary agents include one or more of a defoaming agent, a preservative, a pH regulator, and a hydrophobically modified thickener.

4. The high-viscosity anti-water-skiing rubber asphalt waterproof coating according to claim 1, It is characterized in that The other additives include 0.1% to 0.3% of the total mass of the raw materials of the high-viscosity anti-water-skiing rubber asphalt waterproof coating, a defoamer accounting for 0.1% to 0.3% of the total mass of the raw materials of the high-viscosity anti-water-skiing rubber asphalt waterproof coating, a preservative accounting for 0.1% to 0.3% of the total mass of the raw materials of the high-viscosity anti-water-skiing rubber asphalt waterproof coating, and a hydrophobic modified thickener accounting for 0.1% to 2.5% of the total mass of the raw materials of the high-viscosity anti-water-skiing rubber asphalt waterproof coating; The defoamer is one or more of a mineral oil defoamer, a silicone defoamer, a polyether defoamer, and a polysiloxane defoamer; The preservative is one or more of isothiazolinone preservatives, formaldehyde-releasing preservatives, benzisothiazoline preservatives, and s-triazine preservatives; The hydrophobically modified thickener is one or more of a hydrophobically modified alkali-swellable thickener, a hydrophobically modified alkali-swellable associative thickener, and a hydrophobically modified polyurethane thickener.

5. A method for preparing a highly viscous and anti-water-skiing rubber asphalt waterproof coating according to any one of claims 1 to 4, It is characterized in that At room temperature, modified asphalt emulsion, vinyl acetate-ethylene copolymer emulsion, cross-linkable anionic polymer emulsion and aqueous tackifying emulsion are mixed, defoamer, bactericide, aqueous cross-linking agent, catalyst and thickener are added, the pH value of the system is maintained in the range of 8 to 10, and the obtained mixture is reacted at 50 to 70°C.

6. The preparation method according to claim 5, It is characterized in that The preparation method specifically comprises the following steps: (1) mixing a modified asphalt emulsion, a vinyl acetate-ethylene copolymer emulsion, a cross-linkable anionic polymer emulsion and an aqueous tackifying emulsion, and stirring them uniformly at room temperature; (2) adding defoamer and bactericide in sequence, stirring evenly at room temperature, and using pH adjuster to maintain the pH value of the system in the range of 8 to 10; (3) adding an aqueous crosslinking agent and a catalyst in sequence and stirring evenly at room temperature; (4) Add a thickener and use a pH adjuster to maintain the pH value of the system within the range of 8 to 10, stir evenly, divide into packaging containers, and place at 50 to 70° C. to react for 24 to 48 hours.

7. The preparation method according to claim 5, It is characterized in that The preparation method of the modified asphalt emulsion comprises the following steps: (a) heating asphalt and aromatic oil to 130-140° C. and stirring uniformly to obtain a mixture I; (b) mixing the EVA resin with the mixture I, raising the temperature to 160-180° C., shearing and stirring until the EVA resin is completely dissolved, and cooling to 130-160° C. to obtain a mixture II; (c) mixing an anionic emulsifier, a stabilizer and water to prepare a soap solution, adjusting the pH value of the soap solution to 10 to 12, and controlling the temperature of the soap solution to 30 to 80° C. to obtain a mixture III; (d) Mixture II and mixture III are mixed by an emulsified asphalt colloid mill, and the discharged materials are cooled to obtain the modified asphalt emulsion.

8. A waterproof laminate, Features: The waterproof laminate comprises a substrate layer, a waterproof coating layer and an asphalt-based waterproof coiled material layer, wherein the waterproof coating layer is formed by the high-viscosity anti-water-skid rubber asphalt waterproof coating according to any one of claims 1 to 4.

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