Composite asphalt-based waterproof coiled material and application thereof

Abstract

The invention provides a composite asphalt-based waterproof coiled material and application thereof. The composite asphalt-based waterproof coiled material comprises a tire base layer, and an asphalt material layer and a reaction bonding coating are sequentially arranged on at least one surface of the tire base layer; wherein the reaction bonding coating is formed by drying and curing emulsion slurry, the emulsion slurry contains an emulsion component with the glass transition temperature of-30 DEG C to 0 DEG C or 15 DEG C to 20 DEG C, and the mass content of the emulsion component in the emulsion slurry is not lower than 20%; the emulsion component comprises at least one of an acrylic emulsion, a vinyl acetate-acrylic emulsion and a styrene-acrylic emulsion, the emulsion contains active groups, and the active groups comprise at least one of hydroxyl and carboxyl. The reaction bonding coating can be used for replacing a film used in the prior art of the coiled material, the composite asphalt-based waterproof coiled material has good anti-bonding performance under the condition that the detection index and the application performance of the composite asphalt-based waterproof coiled material are not affected, and a user does not need to worry about adhesion of the coiled material.

Description

Technical Field

[0001] The invention belongs to the field of asphalt coiled materials, and in particular relates to a composite asphalt-based waterproof coiled material and application thereof. Background Art

[0002] Asphalt waterproofing membranes can be divided into different categories according to their composition and performance characteristics, including traditional asphalt waterproofing membranes, elastomer-modified asphalt waterproofing membranes (SBS membranes), plastomer-modified asphalt waterproofing membranes (APP membranes), and self-adhesive polymer-modified asphalt waterproofing membranes (APF membranes). Among them, traditional asphalt waterproofing membranes are based on oxidized asphalt, but have gradually been replaced by modified asphalt in modern applications. SBS membranes use ethylene-butadiene-styrene (SBS) thermoplastic elastomer as a modifier, and have good elasticity and low-temperature resistance. APP membranes use random polypropylene (APP) or polyolefin polymers (APAO) as modifiers, mainly to improve the high-temperature resistance of the membrane. APF membranes are self-adhesive, easy to construct, and do not require additional adhesives.

[0003] From the above, it can be seen that currently asphalt waterproofing membranes can be selected according to different needs, so asphalt waterproofing membranes are currently conventional materials in the building waterproofing market. In addition, asphalt waterproofing membranes are generally packaged in the form of "rolls", but asphalt materials are prone to adhesion at room temperature. Therefore, the surface of the asphalt waterproofing membranes currently provided on the market will adopt polyester or polyethylene films (such as PE films, PET films or PVC films), which can play the role of isolation and anti-adhesion. In terms of construction methods, films are mainly divided into two categories. One type does not need to be torn off during construction, and the film is melted by open flame baking (hot melt method), and then bonded with the base treatment agent by open flame melting at the same time. The other type needs to be torn off during construction, and after tearing off, it is bonded to the base treated with the base treatment agent (dry laying method), or cement mortar is used as a binder to bond to the base (wet laying method).

[0004] However, the asphalt waterproofing membranes provided by the prior art have different problems. For example, in the hot melt method, an open flame is used to bake the asphalt membrane during the construction process. The asphalt emits harmful gases when heated, which endangers the health of the construction workers. In addition, since the hot melt method uses an open flame at the construction site, coal gas or acetylene gas is required. These gases are flammable and explosive, and are prone to fire, explosion and other safety accidents. As for the membranes using the dry-laying method and the wet-laying method, on the one hand, since the film on the surface needs to be torn off during construction, the film becomes white garbage, which is not in line with the green environmental protection values ​​currently advocated; on the other hand, when constructing the dry-laying method or the wet-laying method of the membrane, it takes a lot of man-hours to tear off the film, which increases the construction cost. Summary of the invention

[0005] In order to improve the deficiencies of the prior art of asphalt-based waterproofing membranes, the present invention provides a composite asphalt-based waterproofing membrane and application thereof.

[0006] According to one aspect of the present invention, there is provided a composite asphalt-based waterproof membrane, which includes a base layer, and an asphalt material layer and a reactive bonding coating layer are sequentially arranged on at least one surface of the base layer; wherein the reactive bonding coating layer is formed by drying and solidifying an emulsion slurry, the emulsion slurry contains an emulsion component having a glass transition temperature of -30 to -10 or 5 to 20°C, and the mass content of the emulsion component in the emulsion slurry is not less than 20%; the emulsion component includes at least one of acrylic emulsion, acetic acid-propylene emulsion, and styrene-propylene emulsion, and the emulsion component contains active groups, and the active groups include at least one of hydroxyl and carboxyl groups.

[0007] On the one hand, the present invention can control the re-adhesion of the reaction bonding coating by selecting an emulsion with a specific glass transition temperature to ensure that the composite asphalt-based waterproofing membrane will not have adhesion problems during transportation and storage; on the other hand, the present invention can react with dicalcium silicate, tricalcium silicate, etc. in cement by utilizing active groups such as hydroxyl or carboxyl contained in the emulsion to achieve strong adhesion with cement mortar. Therefore, the present invention can provide a composite asphalt-based waterproofing membrane that does not require film tearing operations or hot-melt construction during on-site construction. It only requires directly opening the asphalt-based waterproofing membrane and performing construction operations such as laying after the surface of the reaction bonding coating is composited with cement mortar.

[0008] Preferably, an asphalt material layer and a reactive bonding coating are sequentially arranged on one surface of the tire base layer; the emulsion slurry is composed of the emulsion component, and the glass transition temperature of the emulsion component is 15-20° C. The inventors have found that the glass transition temperature of the emulsion component affects the re-adhesion of the formed reactive bonding coating. When the glass transition temperature of the emulsion component is 15-20° C., its re-adhesion at room temperature is poor, thereby being able to play an isolation and anti-adhesion role at room temperature.

[0009] Preferably, the heat resistance of the asphalt-based rubber is ≥70° C. and the low-temperature flexibility is ≤-20° C. The asphalt-based rubber is applicable to the national standard GB / T35467-2017 "Wet-laid waterproofing membrane".

[0010] Preferably, the asphalt material layer includes a first asphalt material layer and a second asphalt material layer; the reactive bonding coating includes a first reactive bonding coating and a second reactive bonding coating; the composite asphalt-based waterproofing membrane includes a first reactive bonding coating, a first asphalt material layer, a tread layer, a second asphalt material layer, and a second reactive bonding coating arranged in sequence; the mass content of the emulsion component in the emulsion slurry is 20 to 50%, and the glass transition temperature of the emulsion component is -30 to -10°C. The inventors found that when the glass transition temperature of the emulsion component is between -30 and -10°C, and its back-tack at room temperature is poor, it can play an isolation and anti-sticking role at room temperature.

[0011] Preferably, the emulsion slurry further comprises powder, and the powder comprises at least one of calcium carbonate, quartz powder and barium sulfate.

[0012] Preferably, the raw materials for preparing the reactive bonding coating further include an auxiliary agent, and the auxiliary agent includes at least one of a defoaming agent, a dispersant, and a thickener.

[0013] Preferably, the defoaming agent comprises at least one of mineral oil and silicone defoaming agent.

[0014] Preferably, the thickener comprises at least one of a cellulose thickener, a swelling-reducing thickener or a polyurethane thickener.

[0015] Preferably, the dispersant includes at least one of an inorganic dispersant, an organic dispersant, and a high molecular polymer dispersant.

[0016] Preferably, calculated by weight, the raw materials for preparing the reactive bonding coating include 20 to 50 parts of emulsion components and 40 to 60 parts of powder.

[0017] Preferably, in the raw materials for preparing the reactive bonding coating, the pigment volume concentration PVC ≤ the critical pigment volume concentration (CPVC).

[0018] Preferably, the raw materials for preparing the asphalt material layer include asphalt-based rubber, and the asphalt-based rubber complies with the national standards GB23441-2009 "Self-adhesive polymer modified asphalt waterproof membrane" or GB / T35467-2017 "Wet-laid waterproof membrane".

[0019] Preferably, the heat resistance of the asphalt-based rubber is ≥70°C and the low-temperature flexibility is ≤-20°C.

[0020] Preferably, the first asphalt material layer and / or the second asphalt material layer include a styrene-butadiene-styrene modified asphalt layer and a water-emulsion polymer modified asphalt layer; the styrene-butadiene-styrene modified asphalt layer is arranged on the surface close to the tread base layer, and the water-emulsion polymer modified asphalt layer is arranged on the surface of the SBS modified asphalt rubber layer and away from the tread base layer.

[0021] Preferably, the raw materials for preparing the styrene-butadiene-styrene modified asphalt layer include asphalt-based rubber, the heat resistance of the asphalt-based rubber is ≥90°C, and the low-temperature flexibility is ≤-20°C; and / or, the raw materials for preparing the water-emulsified polymer modified asphalt layer include water-emulsified asphalt-based coating, the heat resistance of the water-emulsified asphalt-based coating is ≥80°C, and the low-temperature flexibility is ≤0°C. Among them, the asphalt-based rubber is applicable to the national standard GB18242-2008 "Elastomer modified asphalt waterproofing membrane"; the water-emulsified asphalt-based coating is applicable to the industry standard JC-T408-2005 "Water-emulsified asphalt waterproof coating".

[0022] Preferably, the water-emulsified asphalt-based coating includes emulsified asphalt obtained by adding an emulsifier to modified asphalt, and the modified asphalt includes at least one of SBS modified asphalt, SIS modified asphalt, and SBR modified asphalt; or, the water-emulsified asphalt-based coating includes an emulsified asphalt coating formed by emulsifying base asphalt and adding a polymer emulsion.

[0023] Preferably, the emulsified asphalt includes 90# base emulsified asphalt and polymer emulsion.

[0024] Preferably, the polymer emulsion includes at least one of acrylic emulsion, acetic acid acrylic emulsion, styrene acrylic emulsion and pure acrylic emulsion.

[0025] Preferably, calculated by mass ratio, 90# base emulsified asphalt: polymer emulsion = 50-60: 4-50.

[0026] Preferably, the thickness of the reactive bonding coating is 100 to 200 μm: the thickness of the composite asphalt-based waterproofing membrane is 1 to 4 mm.

[0027] Preferably, the tire base layer includes at least one of polyester tire cloth, glass fiber felt, glass fiber reinforced polyester felt, polyethylene polymer film, and polyester polymer film.

[0028] Another aspect of the present invention provides an application of the above-mentioned composite asphalt-based waterproof membrane in the field of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A cross-sectional view of the asphalt waterproofing membrane provided in Example 1 when it is not rolled up;

[0030] in, Figure 1 The meanings of the reference numerals are as follows: 1. Tire base layer; 2. Asphalt material layer; 3. Reactive bonding coating layer;

[0031] Figure 2 A cross-sectional view of the asphalt waterproofing membrane provided in Example 2 when it is not rolled up;

[0032] in, Figure 2The meanings of the reference numerals are as follows: 1, tread base layer; 2, asphalt material layer; 21, first asphalt material layer; 22, second asphalt material layer; 3, reactive bonding coating layer; 31, first reactive bonding coating layer; 32, second reactive bonding coating layer;

[0033] Figure 3 A cross-sectional view of the asphalt waterproofing membrane provided in Example 3 when it is not rolled up;

[0034] in, Figure 3 The meanings of the accompanying drawings are as follows: 1. tread base layer; 2. asphalt material layer; 21. first asphalt material layer; 211. styrene-butadiene-styrene modified asphalt layer; 212. water-emulsion polymer modified asphalt layer; 22. second asphalt material layer; 221. styrene-butadiene-styrene modified asphalt layer; 222. water-emulsion polymer modified asphalt layer; 3. reaction bonding coating; 31. first reaction bonding coating; 32. second reaction bonding coating. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] Example 1

[0037] Treatment Group 1A

[0038] 1. Material Preparation

[0039] In this embodiment, the raw materials required for the composite asphalt-based waterproofing membrane are prepared according to the materials corresponding to each layer shown in Table 1. In this treatment group, the emulsion slurry is composed of emulsion components.

[0040] Table 1. Raw materials required for this example

[0041] Corresponding functional layer materials Tire base 1 Polyester polymer film (thickness 0.07~0.11mm) Asphalt material layer 2 Asphalt-based rubber, in compliance with Class H standard of GB23441-2009 Reactive Bond Coating 3 <![CDATA[Emulsion components: styrene-acrylic emulsion (Badfu FS-780), T g is 15 - 20 °C]]>

[0042] 2. Method for preparing composite asphalt-based waterproof membrane

[0043] This embodiment follows Figure 1 The structural composite asphalt-based waterproof membrane shown in the figure has a specific preparation method as follows:

[0044] S1. Pass the polyester polymer film between two double rollers in the horizontal direction, the axis line of the double rollers is parallel to the horizontal direction, the heated and melted asphalt-based rubber is piled between the rollers and the polyester polymer film, the double rollers rotate in the direction of the tire base pulling, the tension device is adjusted, the polyester polymer film is pulled through the double rollers, the asphalt-based rubber is laid on the polyester polymer film by double roller extrusion, and then the surface temperature of the asphalt material layer 2 is reduced to 100-120°C in the air cooling channel, so as to obtain the asphalt material layer 2 arranged on the surface of the tire base layer 1;

[0045] S2. Applying styrene acrylic emulsion on the surface of the asphalt material layer 2 by air pressure spraying or roller coating on the side close to the asphalt material layer 2 but away from the tire base layer 1, and then drying at 60 to 80 ° C for 3 minutes to obtain a reaction bonding coating 3 with a thickness of 100 to 200 μm;

[0046] S3. After packaging and rolling, a composite asphalt-based waterproofing membrane with a total thickness of 1.2 mm to 2.0 mm is obtained.

[0047] Treatment Group 2A

[0048] This treatment group prepared the composite asphalt-based waterproofing membrane by the formula and method provided by the treatment group 1A of Example 1. The difference from the treatment group 1A of Example 1 is that the emulsion component used in the preparation of the composite asphalt-based waterproofing membrane in this treatment group is acrylic emulsion (Badford FS-796 brand, T g =5-10°C), except for the above differences, the operation steps of the present treatment group in preparing the composite asphalt-based waterproof membrane are strictly consistent with those of the treatment group 1A of Example 1.

[0049] Treatment Group 3A

[0050] This treatment group prepared the composite asphalt-based waterproofing membrane by referring to the formula and method provided by the treatment group 1A of Example 1. The difference from the treatment group 1A of Example 1 is that the emulsion component used in the preparation of the composite asphalt-based waterproofing membrane in this treatment group is a acetic acid propylene emulsion (Badford RS-2698 brand, T g =5-10°C), except for the above differences, the operation steps of the present treatment group in preparing the composite asphalt-based waterproof membrane are strictly consistent with those of the treatment group 1A of Example 1.

[0051] Treatment Group 4A

[0052] This treatment group prepared the composite asphalt-based waterproof membrane with reference to the formula and method provided by treatment group 1A of Example 1. The difference from treatment group 1A of Example 1 is that when preparing the composite asphalt-based waterproof membrane, the emulsion slurry used by this treatment group includes 22 parts of emulsion component styrene acrylic emulsion (Badford FS-7056 brand, Tg is -30°C), 16 parts of water, 0.3 parts of defoaming agent (Nopco NXZ), 0.5 parts of dispersant (Nopco), 0.1 parts of thickener (Ashland 250HBR), 3 parts of titanium dioxide, and 60 parts of calcium carbonate. Except for the above differences, the operating steps of this treatment group in preparing the composite asphalt-based waterproof membrane are strictly consistent with those of treatment group 1A of Example 1.

[0053] Comparative Group 1A

[0054] The comparative group prepared the composite asphalt-based waterproofing membrane by the formula and method provided by the treatment group 1A of Example 1. The difference from the treatment group 1A of Example 1 is that the emulsion used in the preparation of the composite asphalt-based waterproofing membrane in the comparative group is the silicone-acrylic emulsion RS-8625 (T g The temperature of the composite asphalt-based waterproof membrane in the control group is 0-5°C. Except for the above differences, the operation steps of the control group in preparing the composite asphalt-based waterproof membrane are strictly consistent with those of the treatment group 1A in Example 1.

[0055] Comparative Group 2A

[0056] This comparative group prepares the composite asphalt-based waterproof membrane according to the formula and method provided by treatment group 1A of reference example 1. The difference from treatment group 1A of reference example 1 is that when preparing the composite asphalt-based waterproof membrane, this comparative group does not provide a reactive bonding coating 3. Apart from the above differences, the operating steps for preparing the composite asphalt-based waterproof membrane by this comparative group are strictly consistent with those of treatment group 1A of reference example 1.

[0057] Comparative group 3A

[0058] This comparative group prepares the composite asphalt-based waterproof membrane according to the formula and method provided by treatment group 1A of reference example 1. The difference from treatment group 1A of example 1 is that the mass content of the emulsion component used in this comparative group when preparing the composite asphalt-based waterproof membrane is 10%. Except for the above differences, the operating steps for preparing the composite asphalt-based waterproof membrane in this comparative group are strictly consistent with those of treatment group 5A of example 1.

[0059] Test Example 1

[0060] 1. Test subjects

[0061] The composite asphalt-based waterproof membranes prepared in each treatment group and comparison group in Example 1.

[0062] 2. Test Method

[0063] (1) No stickiness at 50°C: Use a 100μm film-making device to scrape the emulsion onto a peeling plate and place it in a 70°C oven for 30 minutes to ensure drying. After cooling, place it in a 50°C oven. Cut a 4cm*4cm polyethylene sheet with a thickness of 1.0mm and place it on the coating. Then place a 2kg weight on the sheet. The bottom of the weight must not exceed the edge of the sheet. Place it in a 50°C oven for 30 minutes and then take it out. Remove the weight and rotate the glass plate 180°C. If the polyethylene sheet on the coating falls off, it means there is no re-sticking, that is, the re-sticking passes. Among them, "pass" means no stickiness, and "fail" means re-sticking.

[0064] (2) Cement mortar peeling strength: The test was conducted with reference to 5.16 of GB / T35467-2017 “Wet-laid waterproof membrane”. The bonding surface size of the specimen was (70*50) mm. Specifically, the test was conducted through the following steps.

[0065] First, mix cement mortar. The mix ratio of cement mortar is: strength grade 42.5 ordinary Portland cement: ISO standard sand: water = 1:2:0.4. Use large rolls to pour mortar to prepare multiple specimens at the same time. Cut the knife to the specified size before the peeling test. For the convenience of subsequent clamping, remove the isolation film if there is an isolation film. If there is a reactive bonding coating, take anti-adhesion measures for cement mortar at the non-bonding part of the reactive bonding coating. Place the specimen flat on the bottom of the mold with the bonding surface facing up, pour the cement mortar mixture into the mold, vibrate it on the concrete vibration table as specified in JG / T245 for 20s, with a thickness of 30mm~50mm, place it at (20±2)℃ for 24h to demould, and cure it under standard curing conditions for 168h. The specimen is placed in a room at (23±2)℃ for 4h. The cement mortar board is installed on the fixture at one end of the testing machine. The unbonded end of the coiled material is turned 180° and added to the fixture at the other end of the testing machine. The longitudinal axis of the specimen coincides with the axis of the tensile testing machine and the fixture. The distance between the fixtures is at least 100mm. The test is carried out at (23±2)℃ and the tensile speed is (100±10)min.

[0066] Remove the starting and ending 1 / 4 areas in the applied strain diagram, take the average peel force of the middle 1 / 2 area or the average value of the peak area force divided by the width of the specimen as the peel strength of the specimen, in N / mm, and take the arithmetic average of the 5 time results.

[0067] 3. Test results and analysis

[0068] The test results of this test case are shown in Table 2.

[0069] It can be seen from the test data of treatment groups 1A~4A and comparison groups 1A~2A that different types of emulsion components and their glass transition temperatures will affect the re-adhesiveness of the reaction bonding coating 3, which will eventually lead to the composite asphalt-based waterproof membrane being bonded during packaging, rolling, etc. due to the excessively high re-adhesiveness of the reaction bonding coating 3 or the lack of laying of the reaction bonding coating 3, making it difficult to open or lay the composite asphalt-based waterproof membrane normally.

[0070] It can be seen from the treatment group 1A and the comparison group 3A that in the structure provided in this embodiment, the content of the emulsion will affect the peel strength between the composite asphalt-based waterproof membrane and the cement mortar, and further affect the practical application of the composite asphalt-based waterproof membrane.

[0071] Table 2. Test results of this test case

[0072]

[0073]

[0074] Example 2

[0075] Treatment Group 1B

[0076] 1. Material Preparation

[0077] In this embodiment, the raw materials required for the composite asphalt-based waterproofing membrane are prepared according to the materials corresponding to each layer shown in Table 3. Among them, the first reaction bonding coating and the second reaction bonding coating are prepared by emulsion slurry. The specific formula of the emulsion slurry is calculated by weight: 22 parts of emulsion component (Badfu FS-7056T g =-30°C), 16 parts of water, 0.3 parts of defoamer (DiGao 8030), 0.3 parts of dispersant (Nopco SN5040), 0.1 parts

[0078] Thickener (Ashland 250HBR), 60 parts of calcium carbonate.

[0079] Table 3. Raw materials required for this example

[0080]

[0081] 2. Method for preparing composite asphalt-based waterproof membrane

[0082] (1) Preparation of emulsion slurry

[0083] Step a: weigh the emulsion components and mix with water as described above, then add defoamer and dispersant, and stir at a speed of 400 r / min for 10 minutes;

[0084] Step b: Add thickener and continue stirring at a speed of 400 r / min for 20 minutes;

[0085] Step c: Add calcium carbonate and increase the stirring speed to 1000 r / min, and continue to disperse for 30 minutes;

[0086] Step d: reduce the speed to 200 r / min, defoam, discharge and obtain an emulsion slurry.

[0087] (2) Preparation of composite asphalt-based waterproof membrane

[0088] This embodiment follows Figure 2 The structural composite asphalt-based waterproof membrane shown in the figure has a specific preparation method as follows:

[0089] S1. Pass the polyester tire cloth between two double rollers in a vertical direction, with the line connecting the centers of the double rollers perpendicular to the horizontal direction. At the same time, the polyester tire cloth is completely immersed in the melted asphalt material pool on one side of the double rollers. The double rollers rotate in the direction of pulling the polyester tire cloth, and the tension device is adjusted. The polyester tire cloth is pulled through the double rollers on the other side, and the asphalt-based rubber is laid on the polyester tire cloth by double roller extrusion. Then, the surface temperature thereof is reduced to 100-120° C. in the air cooling channel to obtain the first asphalt material layer 21 and the second asphalt material layer 22;

[0090] S2. Applying the emulsion slurry by air pressure spraying or roller coating on the side close to the first asphalt material layer 21 but away from the tire base layer 1, and then drying at 60-80°C for 3 minutes to obtain a first reaction bonding coating 31 with a thickness of 100-200 μm; applying the emulsion slurry by air pressure spraying or roller coating on the side close to the second asphalt material layer 22 but away from the tire base layer 1, and then drying at 60-80°C for 3 minutes to obtain a second reaction bonding coating 32 with a thickness of 100-200 μm;

[0091] S3. After packaging and rolling, a composite asphalt-based waterproofing membrane with a total thickness of 3 mm to 4 mm is obtained.

[0092] Treatment Group 2B

[0093] This treatment group prepared the composite asphalt-based waterproofing membrane with reference to the formula and method provided by treatment group 1B of Example 2. The difference from treatment group 1B of Example 2 is that the formula of the emulsion slurry used in the preparation of the composite asphalt-based waterproofing membrane in this treatment group is: 40 parts of emulsion component, 16 parts of water, 0.2 parts of defoamer, 0.2 parts of dispersant, 3 parts of titanium dioxide, and 40 parts of calcium carbonate. In addition to the above differences, the operating steps of the preparation of the composite asphalt-based waterproofing membrane in this treatment group are strictly consistent with those of treatment group 1B of Example 2.

[0094] Treatment Group 3B

[0095] This treatment group prepared the composite asphalt-based waterproofing membrane with reference to the formula and method provided by treatment group 1B of Example 2. The difference from treatment group 1B of Example 2 is that the mass content of the emulsion component used in the emulsion slurry when preparing the composite asphalt-based waterproofing membrane in this treatment group is 60%. In addition to the above differences, the operation steps of preparing the composite asphalt-based waterproofing membrane in this treatment group are strictly consistent with those of treatment group 1B of Example 2.

[0096] Treatment Group 4B

[0097] This treatment group prepared the composite asphalt-based waterproofing membrane by the formula and method provided by the treatment group 1B of Example 2. The difference from the treatment group 1B of Example 2 is that when preparing the composite asphalt-based waterproofing membrane, the emulsion component used in the emulsion slurry of this treatment group is acrylic emulsion (FS-796 brand, T g =5-10°C). Except for the above differences, the operation steps of the present treatment group in preparing the composite asphalt-based waterproofing membrane are strictly consistent with those of the treatment group 1B of Example 2.

[0098] Comparative group 1B

[0099] The comparative group prepared the composite asphalt-based waterproofing membrane by the formula and method provided by the treatment group 1B of Example 2. The difference from the treatment group 1B of Example 2 is that the emulsion component used in the preparation of the composite asphalt-based waterproofing membrane in the comparative group is the silicone-acrylic emulsion RS-8625 (T g The temperature of the composite asphalt-based waterproof membrane in the control group is 0-5°C. Except for the above differences, the operation steps of the control group in preparing the composite asphalt-based waterproof membrane are strictly consistent with those of the treatment group 1B in Example 2.

[0100] Comparative group 2B

[0101] This comparative group prepares the composite asphalt-based waterproof membrane with reference to the formula and method provided by treatment group 1B of Example 2. The difference from treatment group 1B of Example 2 is that when preparing the composite asphalt-based waterproof membrane, this comparative group does not provide a reactive bonding coating 3. Apart from the above differences, the operating steps for preparing the composite asphalt-based waterproof membrane in this comparative group are strictly consistent with those of treatment group 1B of Example 2.

[0102] Comparative group 3B

[0103] This comparative group prepares the composite asphalt-based waterproof membrane according to the formula and method provided by treatment group 1B of reference example 2. The difference from treatment group 1B of example 2 is that the mass content of the emulsion component used in this comparative group when preparing the composite asphalt-based waterproof membrane is 10%. Except for the above differences, the operating steps for preparing the composite asphalt-based waterproof membrane in this comparative group are strictly consistent with those of treatment group 1B of example 2.

[0104] Test Example 2

[0105] 1. Test subjects

[0106] The composite asphalt-based waterproof membranes prepared in each treatment group and comparison group in Example 2.

[0107] 2. Test Method

[0108] Refer to the test method provided in Test Example 1.

[0109] 3. Test results and analysis

[0110] The test results of this test case are shown in Table 4.

[0111] It can be seen from the test data of treatment groups 1B~4B and comparison groups 1~3B that the formula of the emulsion slurry will affect the performance of the reaction bonding coating 3 formed. Under the structural premise provided in Example 2, when the mass content of the emulsion component in the emulsion slurry is 50%, it has better peel strength and anti-adhesion. In addition, different types of emulsions and their glass transition temperatures will affect the re-adhesion of the reaction bonding coating 3. In addition, the setting of the reaction bonding coating 3 can provide a composite asphalt-based waterproof membrane that does not require film tearing operations or hot-melt construction during on-site construction. It only needs to directly open the asphalt-based waterproof membrane, and after the surface of the reaction bonding coating is compounded with cement mortar, it can be laid and other construction operations.

[0112] Table 4. Test results of this test case

[0113] Group No stickiness at 50℃ Peel strength / (N / mm) Treatment Group 1B pass 2 Treatment Group 2B pass 1.8 Treatment Group 3B Not passed 2.2 Treatment Group 4B pass 1.9 Comparative group 1B Not passed 0 Comparative group 2B Not passed 2.1 Comparative group 3B pass 0

[0114] Example 3

[0115] Treatment Group 1C

[0116] 1. Material Preparation

[0117] In this embodiment, the raw materials required for the composite asphalt-based waterproof membrane are prepared according to the materials corresponding to each layer shown in Table 5.

[0118] Among them, the first reaction bonding coating 31 and the second reaction bonding coating 32 are respectively prepared by emulsion slurry. Calculated by mass, the specific formula of the emulsion slurry is: 22 parts of emulsion component (Badford FS-7056 brand, Tg is -30°C), 16 parts of water, 0.3 parts of defoaming agent (Nopco NXZ), 0.5 parts of dispersant (Nopco), 0.1 parts of thickener (Ashland 250HBR), 3 parts of titanium dioxide, and 60 parts of calcium carbonate.

[0119] The water-emulsion polymer modified asphalt layer 212 and the water-emulsion polymer modified asphalt layer 222 are respectively made of emulsified asphalt. Calculated by weight, the formula of the emulsified asphalt is: 60 parts of 90# base emulsified asphalt (Zhuzhou Rubber and Plastic Institute EB-08S), 40 parts of polymer emulsion (Badful FS-7860), and 0.2 parts of thickener (Rohm and Haas TT615).

[0120] Table 5. Raw materials required for this example

[0121]

[0122]

[0123] 2. Method for preparing composite asphalt-based waterproof membrane

[0124] (1) Preparation of emulsified asphalt

[0125] 90# base emulsified asphalt and polymer emulsion were added in metered amounts, stirred at a stirring speed of 300 r / min for 5 minutes, and then thickener was added, stirred at a stirring speed of 500 r / min for 10 minutes; the material was discharged to obtain emulsified asphalt.

[0126] (2) Preparation of emulsion slurry

[0127] Step a: weigh the emulsion components and mix with water as described above, then add defoamer and dispersant, and stir at a speed of 400 r / min for 10 minutes;

[0128] Step b: Add thickener and continue stirring at a speed of 400 r / min for 20 minutes;

[0129] Step c: Add calcium carbonate and titanium dioxide, increase the stirring speed to 1000r / min, and continue to disperse for 30 minutes;

[0130] Step d: reduce the speed to 200 r / min, defoam, discharge and obtain an emulsion slurry.

[0131] (3) Preparation of composite asphalt-based waterproof membrane

[0132] This embodiment follows Figure 3 The structural composite asphalt-based waterproof membrane shown in the figure has a specific preparation method as follows:

[0133] S1. Pass the polyester tire cloth between two double rollers in a vertical direction, and at the same time, completely immerse the polyester tire cloth in a pool of melted asphalt material on one side of the double rollers, rotate the double rollers in the direction of pulling the tire base, adjust the tension device, and pass the polyester tire cloth through the double rollers by pulling the polyester tire cloth on the other side, lay the asphalt-based rubber on the polyester tire cloth by double roller extrusion, and then reduce its surface temperature to 100-120° C. in an air cooling channel to obtain a styrene-butadiene-styrene modified asphalt layer 211 and a styrene-butadiene-styrene modified asphalt layer 212;

[0134] S2. Applying emulsified asphalt by air pressure spraying or roller coating on the side close to the styrene-butadiene-styrene modified asphalt layer 211 but away from the tire base layer 1, and then drying at 60-80°C for 3 minutes to obtain a water-emulsified polymer modified asphalt layer 212 with a thickness of 50-300 um; applying emulsified asphalt by air pressure spraying or roller coating on the side close to the styrene-butadiene-styrene modified asphalt layer 212 but away from the tire base layer 1, and then drying at 60-80°C for 3 minutes to obtain a water-emulsified polymer modified asphalt layer 222 with a thickness of 50-300 um;

[0135] S3. Applying the emulsion slurry by air pressure spraying or roller coating on the side close to the water-emulsion polymer modified asphalt layer 212 but away from the styrene-butadiene-styrene modified asphalt layer 211, and then drying at 60-80°C for 3 minutes to obtain a first reaction bonding coating 31 with a thickness of 100-200 μm; applying the emulsion slurry by air pressure spraying or roller coating on the side close to the water-emulsion polymer modified asphalt layer 222 but away from the styrene-butadiene-styrene modified asphalt layer 221, and then drying at 60-80°C for 3 minutes to obtain a second reaction bonding coating 32 with a thickness of 100-200 μm;

[0136] S4. After packaging and rolling, a composite asphalt-based waterproofing membrane with a total thickness of 3 mm to 4 mm is obtained.

[0137] Treatment Group 2C

[0138] This treatment group prepared the composite asphalt-based waterproofing membrane with reference to the formula and method provided by treatment group 1C of Example 3. The difference from treatment group 1C of Example 3 is that the formula of the emulsion slurry used in the preparation of the composite asphalt-based waterproofing membrane in this treatment group is: 40 parts of emulsion component, 16 parts of water, 0.2 parts of defoamer, 0.2 parts of dispersant, 3 parts of titanium dioxide, and 40 parts of calcium carbonate. In addition to the above differences, the operating steps of the preparation of the composite asphalt-based waterproofing membrane in this treatment group are strictly consistent with those of treatment group 1C of Example 3.

[0139] Treatment Group 3C

[0140] This treatment group prepared the composite asphalt-based waterproofing membrane with reference to the formula and method provided by treatment group 1C of Example 3. The difference from treatment group 1C of Example 3 is that the mass content of the emulsion component used in the emulsion slurry when preparing the composite asphalt-based waterproofing membrane in this treatment group is 60%. In addition to the above differences, the operation steps of preparing the composite asphalt-based waterproofing membrane in this treatment group are strictly consistent with those of treatment group 1C of Example 3.

[0141] Treatment Group 4C

[0142] This treatment group prepared the composite asphalt-based waterproofing membrane with reference to the formula and method provided by treatment group 1C of Example 3. The difference from treatment group 1C of Example 3 is that this treatment group did not set the water-emulsion polymer modified asphalt layer 212 and the water-emulsion polymer modified asphalt layer 222 when preparing the composite asphalt-based waterproofing membrane. In addition to the above differences, the operation steps of this treatment group in preparing the composite asphalt-based waterproofing membrane are strictly consistent with those of treatment group 1C of Example 3.

[0143] Comparative group 1C

[0144] The composite asphalt-based waterproofing membrane was prepared by the formula and method provided by the treatment group 1C of Example 3 in this comparative group. The difference from the treatment group 1C of Example 3 is that the emulsion component used in the preparation of the composite asphalt-based waterproofing membrane in this comparative group is the silicone-acrylic emulsion RS-8625 (T g The temperature of the composite asphalt-based waterproof membrane in the control group is 0-5°C. Except for the above differences, the operation steps of the control group in preparing the composite asphalt-based waterproof membrane are strictly consistent with those of the treatment group 1C in Example 3.

[0145] Comparative group 2C

[0146] This comparative group prepares the composite asphalt-based waterproof membrane with reference to the formula and method provided by treatment group 1C of Example 3. The difference from treatment group 1C of Example 3 is that this comparative group does not set the reactive bonding coating 3 when preparing the composite asphalt-based waterproof membrane. Except for the above difference, the operating steps of this comparative group when preparing the composite asphalt-based waterproof membrane are strictly consistent with those of treatment group 1C of Example 3.

[0147] Comparative group 3C

[0148] This comparative group prepares the composite asphalt-based waterproof membrane according to the formula and method provided by treatment group 1C of reference example 3. The difference from treatment group 1C of example 3 is that the mass content of the emulsion component used in the preparation of the composite asphalt-based waterproof membrane in this comparative group is 10%. Except for the above differences, the operating steps for preparing the composite asphalt-based waterproof membrane in this comparative group are strictly consistent with those of treatment group 1C of example 3.

[0149] Test Example 3

[0150] 1. Test subjects

[0151] The composite asphalt-based waterproof membranes prepared in each treatment group and comparison group in Example 3.

[0152] 2. Test Method

[0153] Refer to the test method provided in Test Example 1.

[0154] 3. Test results and analysis

[0155] The test results of this test case are shown in Table 6.

[0156] It can be seen from the test data of treatment groups 1C to 4C and comparison groups 1C to 3C that under the formula of treatment group 1C, other Tg is very low and there is no back-adhesion. In addition, the formula of the emulsion slurry will affect the performance of the formed reactive bonding coating 3. When the mass content of the emulsion component in the emulsion slurry is 20-40%, the composite asphalt-based waterproof membrane has better peel strength and anti-back-adhesion. In addition, the simultaneous setting of the water-emulsion polymer modified asphalt layer and the styrene-butadiene-styrene modified asphalt layer helps to improve the interlayer adhesion, thereby enhancing the adhesion of the composite asphalt-based waterproof membrane.

[0157] Table 6. Test results of this test case

[0158] Group No stickiness at 50℃ Peel strength / (N / mm) Treatment Group 1C pass 1.8 Treatment Group 2C pass 2.1 Treatment Group 3C Not passed 2.4 Treatment Group 4C pass 0.5 Comparative group 1C Not passed 0 Comparative group 2C Not passed 2.4 Comparative group 3C pass 0

[0159] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A composite asphalt-based waterproofing membrane, characterized in that: The composite asphalt-based waterproofing membrane comprises a tread base layer, on at least one surface of which an asphalt material layer and a reactive bonding coating layer are sequentially arranged; The reactive bonding coating is formed by drying and curing an emulsion slurry, wherein the emulsion slurry contains an emulsion component having a glass transition temperature of -30 to -10°C or 5 to 20°C, and the mass content of the emulsion component in the emulsion slurry is not less than 20%; The emulsion component includes at least one of acrylic emulsion, acetic acid acrylic emulsion and styrene acrylic emulsion, and the emulsion component contains active groups, and the active groups include at least one of hydroxyl groups and carboxyl groups.

2. The composite asphalt-based waterproof membrane according to claim 1, characterized in that: The asphalt material layer and the reactive bonding coating are sequentially arranged on one surface of the tire base layer; the emulsion slurry is composed of the emulsion components, and the glass transition temperature of the emulsion components is 5 to 20°C.

3. The composite asphalt-based waterproof membrane according to claim 2, characterized in that: The raw materials for preparing the asphalt material layer include asphalt-based rubber, and the heat resistance of the asphalt-based rubber is ≥70°C and the low-temperature flexibility is ≤-20°C.

4. The composite asphalt-based waterproof membrane according to claim 1, characterized in that: The asphalt material layer includes a first asphalt material layer and a second asphalt material layer; the reactive bonding coating includes a first reactive bonding coating and a second reactive bonding coating; The composite asphalt-based waterproofing membrane comprises the first reactive bonding coating, the first asphalt material layer, the tread base layer, the second asphalt material layer, and the second reactive bonding coating, which are arranged in sequence; The mass content of the emulsion component in the emulsion slurry is 20 to 50%, and the glass transition temperature of the emulsion component is -30 to -10°C.

5. The composite asphalt-based waterproof membrane according to claim 4, characterized in that: The emulsion slurry also includes powder, and the powder includes at least one of titanium dioxide, calcium carbonate, barium sulfate, kaolin, wollastonite, and quartz powder.

6. The composite asphalt-based waterproof membrane according to claim 4, characterized in that: The raw materials for preparing the asphalt material layer include asphalt-based rubber, and the heat resistance of the asphalt-based rubber is ≥70°C and the low-temperature flexibility is ≤-20°C.

7. The composite asphalt-based waterproof membrane according to claim 4, characterized in that: The first asphalt material layer and / or the second asphalt material layer include a styrene-butadiene-styrene modified asphalt layer and a water-emulsion polymer modified asphalt layer; the styrene-butadiene-styrene modified asphalt layer is arranged on a surface close to the tread base layer, and the water-emulsion polymer modified asphalt layer is arranged on the surface of the styrene-butadiene-styrene modified asphalt layer and on a side away from the tread base layer.

8. The composite asphalt-based waterproof membrane according to claim 7, characterized in that: The raw materials for preparing the styrene-butadiene-styrene modified asphalt layer include asphalt-based rubber, and the heat resistance of the asphalt-based rubber is ≥90°C, and the low-temperature flexibility is ≤-20°C; and / or, the raw materials for preparing the water-emulsion polymer modified asphalt layer include water-emulsion asphalt-based coating, and the heat resistance of the water-emulsion asphalt-based coating is ≥80°C, and the low-temperature flexibility is ≤0°C.

9. The composite asphalt-based waterproofing membrane according to any one of claims 1 to 8, characterized in that: The thickness of the reaction bonding coating is 100 to 200 μm: the thickness of the composite asphalt-based waterproofing membrane is 1.2 to 4 mm.

10. Use of the composite asphalt-based waterproof membrane according to any one of claims 1 to 9 in the field of construction.

Images