A three-layer pre-laid waterproofing roll and its preparation method

Abstract

The present invention discloses a three-layer pre-laid waterproofing membrane and a preparation method thereof. The three-layer pre-laid waterproofing membrane comprises a main material layer, an adhesive layer and an anti-sticking and weather-resistant anti-adhesive film. The pre-laid waterproofing membrane prepared by the present invention does not require a removable release film as an anti-sticking and weather-resistant isolation material of the pre-laid membrane, can be bonded to post-cast concrete, and facilitates the watertight sealing of the overlap between the membranes; the prepared pre-laid waterproofing membrane still has excellent bonding performance with post-cast concrete after being soaked in water for a long time, has good water resistance, and can resist the cracking of the anti-sticking and weather-resistant isolation material caused by deformation of the pre-laid membrane due to violent transportation / loading and unloading, and the adhesive layer is bonded to the main material layer, and cannot be unrolled during construction.

Description

Technical Field

[0001] The invention belongs to the technical field of pre-laid waterproof coiled materials, and in particular relates to a three-layer pre-laid waterproof coiled material and a preparation method thereof. Background Art

[0002] Pre-laid anti-adhesive waterproofing membrane can achieve full adhesion with the structure. With its excellent anti-water leakage performance, it is widely used in underground projects, open-cut tunnel projects, dark-cut tunnel projects, underground pipe gallery waterproofing projects, etc. Pre-laid anti-adhesive waterproofing membranes mainly include polymer pre-laid anti-adhesive waterproofing membranes and asphalt-based pre-laid anti-adhesive waterproofing membranes. Among them, polymer pre-laid anti-adhesive waterproofing membranes are composed of polymer sheets, self-adhesive layers, and anti-adhesive weather-resistant layers; asphalt-based pre-laid anti-adhesive waterproofing membranes are composed of PE membranes, tire bases, modified asphalt coatings, and anti-adhesive weather-resistant layers. The anti-adhesive weather-resistant layer is a very important structural layer of pre-laid waterproofing membranes, which must be resistant to pollution, aging, sunscreen, accessible to people, and anti-adhesive (preventing the adhesive layer from bonding to the main material).

[0003] Pre-laid waterproofing membranes are generally coated with inorganic particles or pre-sprayed with a layer of coating and then covered with an isolation film as an anti-sticking and weather-resistant material.

[0004] Among them, the inorganic particles of pre-laid coiled materials are mostly cement sand, quartz sand, mullite sand, sintered sand, colored pottery sand, etc. Due to the weak combination of inorganic particles and adhesive layer, sand falling and particle sinking are easy to occur during construction and application, and inorganic particles cannot completely cover the adhesive layer, resulting in the adhesive layer being directly exposed to the air, which is easily oxidized or corroded by oxygen in the air or oxidizing or corrosive substances in the water body and damaged by ultraviolet rays in the sun, resulting in a sharp decline in the performance of the adhesive layer over time. For some underground projects and open-cut tunnel projects, after laying the pre-laid anti-adhesive coiled materials, it is necessary to tie the steel bars before pouring the concrete. During this period, the pre-laid waterproof coiled materials need to be exposed to the sun for sometimes up to 2 months. Long-term outdoor exposure will easily cause the adhesive layer of the particle surface pre-laid coiled materials to age, thus affecting the pre-laid anti-adhesive effect. At the same time, the inorganic particle surface coiled materials themselves are also heavy, making transportation and construction difficult; cement sand, quartz sand, etc. have a lot of dust during the sand spreading process, and the production and manufacturing environment is poor.

[0005] For pre-laid coils that are pre-sprayed with a layer of coating and then covered with an isolation film, the pre-sprayed layer of coating needs to be dried online at high temperature, which has a slow production efficiency and the production environment of the spraying workshop is not clean enough. The isolation film needs to be torn off when tying steel bars, which is time-consuming and labor-intensive and no longer has a protective effect on the coating. In case of harsh construction environments and weather factors, the adhesive performance of the adhesive layer is easily compromised after the coating is damaged. Moreover, waste is generated after the isolation film is torn off, which does not meet the requirements of dual-carbon development.

[0006] Based on the above problems, domestic and foreign countries have gradually explored anti-sticking and weather-resistant materials that are non-inorganic particles and do not require coating isolation films.

[0007] At present, there have been reports at home and abroad on the use of water-soluble coatings instead of ordinary isolation materials for wet-laid and pre-laid waterproof membranes. However, due to the use of water-soluble coatings, this type of product cannot come into contact with water during the production, transportation, storage, and waiting for concrete pouring after construction. This constraint has greatly reduced the application and promotion of this product.

[0008] CN109575824A discloses a weather-resistant film for pre-laid waterproofing coiled material and its preparation method and use, wherein the weather-resistant film comprises an isolation layer, a reinforcement layer and a weather-resistant bonding layer stacked in sequence, wherein the isolation layer is a polyvinyl alcohol solution. The structure of the invention is complex and the production process is complicated. Polyvinyl alcohol has good water solubility, and the interlayer bonding force between the layers will be greatly reduced after long-term immersion in water.

[0009] CN104204378A discloses a waterproof membrane, which is a polymer pre-laid waterproof coiled material that can be directly rolled up. It comprises a carrier sheet (layer A), a waterproof adhesive layer (layer B), a protective coating (layer C), and a strippable material (layer D), wherein the protective coating is substantially free of surfactant and comprises an acrylic or methacrylic polymer or copolymer, an inorganic filler, and a white pigment. The strippable material comprises amorphous nano-silicon dioxide and a polymer binder. The waterproof membrane does not require a stripping liner. It can be strongly bonded to concrete, withstand pedestrian traffic, and can be immersed in water for a long time. When preparing the waterproof membrane, a strippable material (layer D) needs to be coated on a plastic film in advance, and then a protective coating (C) is coated on the strippable material, and then the strippable material is rolled up after drying, and then the roll comprising layer C, layer D, and plastic film is unfolded, layer C is pasted on layer B, and after removing the plastic film from layer D, the four-layer structure comprising layer D, layer C, layer B, and layer A is wound up into a roll (layer A is outside the coiled material). The strippable material layer D is an aqueous mixture of silica and an adhesive. Because the coating has poor deformation resistance, the carrier sheet layer A needs to be placed outside the coil, which makes construction inconvenient. When the coil is violently transported or stored, the coating is easily cracked due to deformation. After the coating cracks, the pressure-sensitive adhesive bonded to the coating is exposed and adheres to the carrier sheet, making it impossible to unroll or difficult to unroll. The peelable material is water-soluble and will melt when it comes into contact with water.

[0010] As can be seen from the above, the existing pre-laid waterproof membranes all have production and application problems to varying degrees, such as slow production efficiency, complicated and cumbersome processes, a significant decrease in interlayer adhesion after long-term immersion in water, inconvenient construction, coating cracking due to deformation of the membrane during transportation and storage, and difficulty in peeling after contact with water. Therefore, there is an urgent need to provide a new structure of pre-laid waterproof membrane and a preparation method thereof. Summary of the invention

[0011] In order to solve the above technical problems, the present invention provides a three-layer pre-laid waterproofing membrane and a preparation method thereof. The membrane has good water resistance, light weight, convenient construction, clean and efficient production, and excellent bonding performance with post-cast concrete.

[0012] In order to achieve the above object, the present invention adopts the following technical solutions:

[0013] A three-layer pre-laid waterproofing coiled material comprises a main material layer, an adhesive layer and an anti-adhesive and weather-resistant anti-adhesive film in sequence.

[0014] The main material layer in the present invention is a polymer sheet or a polymer film base with a thickness of 0.05-2 mm. The polymer sheet and polymer film base can be a rubber material or a resin material of one or more layers. Specifically, when the main material layer is a polymer sheet, its thickness is 0.7-2 mm, and when the main material layer is a polymer film base, its thickness is 0.05-0.7 mm.

[0015] The adhesive layer in the present invention is self-adhesive asphalt adhesive or non-asphalt self-adhesive adhesive. The non-asphalt self-adhesive adhesive is water-based adhesive, solvent-based adhesive or solvent-free adhesive. Preferably, the thickness of the adhesive layer is 0.25-2.0 mm.

[0016] The anti-sticking and weather-resistant anti-sticking film in the present invention is a film material made of water-based paint and reinforcing materials, and preferably has a thickness of 0.06-1 mm, more preferably 0.06-0.5 mm, and even more preferably 0.06-0.35 mm.

[0017] In some specific embodiments, the reinforcing material of the anti-sticking weather-resistant anti-sticking film is a continuous porous material, and the gram weight of the reinforcing material is 12-80 g / m 2 , thickness is 0.05-0.7mm, and mesh aperture is 0.01-5mm.

[0018] Preferably, the reinforcing material is a membrane material with a three-dimensional interpenetrating cross-linked network structure, and its pore size is an irregular pore size. The reinforcing material is prepared by a thermoplastic resin through high-temperature melting, spin forming, and high-temperature hot pressing processes, wherein the thermoplastic resin is at least one of PA, EVA, TPU, PES, PP, PE, PET, PVC, PS, TPO, PC, polyphenylene ether, and polysulfone resins. Further preferably, the gram weight of the reinforcing material is 15-60g / m 2 , thickness is 0.05-0.5mm, and mesh aperture is 0.03-3mm.

[0019] The water-based coating in the present invention comprises a polymer emulsion, a filler and water.

[0020] In some specific embodiments, the water-based coating comprises, by weight, 10-30 parts of polymer emulsion, 5-20 parts of filler and 20-35 parts of water.

[0021] In some specific embodiments, the Tg of the polymer emulsion is less than 0° C. Preferably, the polymer emulsion is at least one of acrylic emulsion, styrene-butadiene emulsion, VAE emulsion and polyurethane emulsion, more preferably acrylic emulsion and styrene-butadiene emulsion; more preferably, the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.3-0.6.

[0022] In some specific embodiments, the filler is organic particles and / or inorganic particles with a mesh size of 60-120 meshes; preferably, the filler is at least one of quartz sand, calcium sand, sintered sand, mullite sand, river sand, sea sand and polymer particles. Further preferably, the gradation of the filler is 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0-0.2: 0.3-0.7: 0.3-0.7.

[0023] In some preferred embodiments, in order to improve the interfacial bonding force between the reinforcing material and the water-based coating, the surface of the reinforcing material is pretreated with an interfacial bonding agent. The pretreatment in the present invention is conventional spraying, scraping, painting or dipping.

[0024] Preferably, the interface binder is compounded by an adhesion promoter and a coupling agent, wherein the adhesion promoter is at least one of an organic silane, an organic titanate, an alkyl phosphate and a metal organic, and the coupling agent is at least one of a vinyl silane, an amino silane and a methyl acryloyl silane. Further preferably, the mass ratio of the adhesion promoter to the coupling agent is 1:0.5-0.8.

[0025] In some preferred embodiments, in order to improve the water resistance and ductility of the water-based coating, the water-based coating also includes an internal cross-linking emulsion, and the internal cross-linking emulsion is at least one of a room temperature self-cross-linking styrene acrylic emulsion, a polyurethane modified acrylate emulsion and a room temperature self-cross-linking pure acrylic emulsion; preferably, the amount of the internal cross-linking emulsion is 5-15 parts by weight.

[0026] In some preferred embodiments, in order to improve the bonding effect between the anti-stick weather-resistant anti-stick film and the post-cast concrete, the water-based coating also includes active fillers and powders, the active fillers are at least one of blast furnace slag, volcanic ash mixed materials, fly ash, calcium silicate, magnesium silicate, aluminum oxide, aluminum silicate and cement, and the powder is at least one of light calcium powder, light bentonite and nano aluminum borate; preferably, by weight, the amount of active filler is 4-20 parts, and the amount of powder is 10-30 parts.

[0027] The water-based coating of the present invention may further include at least one of a pigment filler, an ultraviolet absorber, a suspending agent, a defoaming agent and a dispersing agent according to actual production and application requirements.

[0028] Specifically, the color filler is a water-based color paste, and the dosage is 0-3 parts by weight. The pigment can be white, black, red, gray, and other color pastes can be selected according to needs; the ultraviolet absorber is at least one of salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, and triazines, and the dosage is 0-1.0 parts by weight; the defoamer is at least one of a mineral oil defoamer, a silicone defoamer, and a polyether defoamer, and the dosage is 0-0.5 parts by weight; the dispersant is at least one of a sodium salt of a polycarboxylate, sodium tripolyphosphate, and a fatty acid polyethylene glycol ester, and the dosage is 0-0.5 parts by weight.

[0029] The present invention also provides a method for preparing the above-mentioned anti-sticking weather-resistant anti-sticking film, comprising the following steps:

[0030] S1. Dip the reinforcing material into a water-based coating and scrape off excess coating to a certain thickness;

[0031] S2, drying the reinforcing material soaked with the water-based coating in step S1 to obtain the anti-sticking and weather-resistant anti-sticking film.

[0032] Preferably, the drying temperature in step S2 is 60-80°C.

[0033] The present invention also provides a method for preparing the above-mentioned pre-laid waterproofing coiled material, comprising the following steps:

[0034] (1) coating a glue layer on one side of the main material layer;

[0035] (2) Covering the anti-sticking and weather-resistant anti-sticking film on the adhesive layer to obtain the pre-laid waterproofing membrane.

[0036] The anti-adhesive weather-resistant anti-adhesive film of the present invention can also be formed online together with a pre-laid anti-adhesive waterproofing membrane. Specifically, the preparation method of the pre-laid waterproofing membrane is as follows:

[0037] (1) coating a glue layer on one side of the main material layer;

[0038] (2) spraying the water-based coating of the anti-stick weather-resistant anti-stick film onto the surface of the adhesive layer, laying the reinforcing material of the anti-stick weather-resistant anti-stick film on the surface of the water-based coating, and then spraying the water-based coating, and drying to obtain the pre-laid waterproof membrane.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The pre-laid waterproofing membrane of the present invention has excellent bonding performance with post-cast concrete, does not fall off sand, is light in weight, does not require a covering isolation film, and is easy to construct.

[0041] (2) The pre-laid waterproof membrane of the present invention still has excellent bonding performance with the post-cast concrete after being soaked in water for a long time, and has good water resistance.

[0042] (3) The anti-sticking and weather-resistant anti-adhesive film of the pre-laid waterproofing roll of the present invention has good softness and ductility, and can resist the problem of cracking of the anti-sticking and weather-resistant isolation material caused by deformation of the pre-laid roll due to violent transportation / loading and unloading, and the adhesion of the adhesive layer to the main material layer, which makes it impossible to unroll during construction.

[0043] (4) The pre-laid waterproofing coiled material of the present invention can be prefabricated and the pre-laid coiled material production line has high production efficiency. During the production of the pre-laid coiled material, the anti-sticking weather-resistant isolation membrane material can be directly laid on the adhesive layer, thus achieving efficient, convenient and clean production. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic structural diagram of the pre-laid waterproofing membrane of the present invention.

[0045] Figure 2 This is a microscope picture of the anti-sticking and weather-resistant anti-sticking film of the present invention.

[0046] Figure 3 This is a microscope picture of the three-dimensional mesh membrane of the reinforcement material. DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0048] Before further describing the specific embodiments of the present invention, it should be understood that the scope of protection of the present invention is not limited to the specific embodiments described below; it should also be understood that the terms used in the examples of the present invention are for describing specific embodiments rather than for limiting the scope of protection of the present invention.

[0049] When the embodiment gives a numerical range, it should be understood that, unless otherwise specified in the present invention, the two endpoints of each numerical range and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those of ordinary skill in the art to which the present invention belongs.

[0050] The present invention does not limit the sources of the raw materials used. Unless otherwise specified, the raw materials used in the present invention are common commercial products in the technical field.

[0051] like Figure 1 As shown, the present invention discloses a three-layer pre-laid waterproofing coiled material, which comprises a main material layer 1, an adhesive layer 2 and an anti-sticking and weather-resistant anti-sticking film 3 in sequence.

[0052] The thickness of the main material layer 1 in the present invention is 0.05-2mm, which is a resin material or a rubber material; the thickness of the adhesive layer 2 is 0.25-2.0mm, which is a self-adhesive asphalt adhesive or a non-asphalt self-adhesive adhesive, wherein the non-asphalt self-adhesive adhesive is a water-based adhesive, a solvent-based adhesive or a solvent-free adhesive; the thickness of the anti-sticking and weather-resistant anti-adhesive film 3 is 0.06-1mm, preferably 0.06-0.5mm, and further preferably 0.06-0.35mm.

[0053] like Figure 2 As shown, the anti-stick weather-resistant anti-stick film 3 is a membrane material with a rough surface made of water-based paint and reinforcing materials. As an anti-stick weather-resistant isolation material for pre-laid coiled materials, it does not require a removable release film, can be bonded to post-poured concrete, and facilitates the watertight sealing of the overlaps between coils. The anti-stick weather-resistant anti-stick film can be rolled up and stored after prefabrication, giving the pre-laid coiled materials efficient, clean and convenient production.

[0054] like Figure 3 As shown, the reinforcing material of the anti-sticking weather-resistant anti-sticking film 3 of the present invention is a membrane material with a three-dimensional interpenetrating cross-linked network structure, and its pore size is an irregular pore size. The reinforcing material is prepared by a thermoplastic resin through high-temperature melting, spin forming, and high-temperature hot pressing processes, wherein the thermoplastic resin is at least one of PA, EVA, TPU, PES, PP, PE, PET, PVC, PS, TPO, PC, polyphenylene ether, and polysulfone resins. The gram weight of the reinforcing material is 12-80g / m 2 , thickness is 0.05-0.7mm, mesh aperture is 0.01-5mm. Preferably, the weight of the reinforcing material is 15-60g / m 2 , thickness is 0.05-0.5mm, and mesh aperture is 0.03-3mm.

[0055] Example 1

[0056] Raw materials of anti-stick weather-resistant anti-stick film:

[0057] The water-based paint comprises, by weight, 10 parts of a polymer emulsion, 20 parts of a filler and 35 parts of water; wherein the polymer emulsion is an acrylic emulsion with a Tg of -18°C, and the filler is quartz sand with a mesh size of 60 meshes; specifically, the preparation method of the water-based paint is: adding the filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding the polymer emulsion, and dispersing for 30 minutes to obtain the water-based paint.

[0058] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of PP, with a gram weight of 15g / m 2 , the irregular mesh size is 0.5-5mm and the thickness is 0.06mm.

[0059] The preparation method of the anti-sticking weather-resistant anti-sticking film is as follows:

[0060] (1) Place the reinforcement material on an unwinding rack and unwind it, and add the water-based coating into a dipping box;

[0061] (2) The reinforcing material is transported to a dipping box. After the reinforcing material is dipped in water-based paint, the inside and surface of the mesh are dipped in water-based paint. After the dipping is completed, the excess water-based paint is scraped off on both sides using a thickness-fixing wire rod;

[0062] (3) transporting the reinforcing material soaked with a certain thickness of water-based coating to an oven for drying at a temperature of 60-80°C;

[0063] (4) The dried reinforcing material soaked in water-based paint is adjusted, trimmed, and rolled up to obtain the reinforcing material.

[0064] Example 2

[0065] Raw materials of anti-stick weather-resistant anti-stick film:

[0066] The water-based paint comprises, by weight, 30 parts of a polymer emulsion, 5 parts of a filler and 20 parts of water; wherein the polymer emulsion is a styrene-butadiene emulsion with a Tg of -7°C, and the filler is sintered sand with a mesh size of 80 meshes; specifically, the preparation method of the water-based paint is: adding the filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding the polymer emulsion, and dispersing for 30 minutes to obtain the water-based paint.

[0067] The reinforcing material is a three-dimensional mesh membrane (purchased from Suzhou Hanruis New Material Technology Co., Ltd.), made of PA, with a gram weight of 25g / m 2 , the irregular mesh size is 0.5-3mm and the thickness is 0.15mm.

[0068] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0069] Example 3

[0070] Raw materials of anti-stick weather-resistant anti-stick film:

[0071] The water-based paint comprises, by weight, 20 parts of polymer emulsion, 10 parts of filler and 25 parts of water; wherein the polymer emulsion is a VAE emulsion with a Tg of -2°C, and the filler is river sand with a mesh size of 100 mesh; specifically, the preparation method of the water-based paint is: adding filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding polymer emulsion, and dispersing for 30 minutes to obtain the water-based paint.

[0072] The reinforcing material is a three-dimensional mesh membrane (purchased from Shanghai Xingxia Polymer Products Co., Ltd.), made of EVA, with a gram weight of 60g / m 2 , the irregular mesh size is 0.3-2mm and the thickness is 0.3mm.

[0073] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0074] Example 4

[0075] Raw materials of anti-stick weather-resistant anti-stick film:

[0076] The water-based paint comprises, by weight, 15 parts of polymer emulsion, 15 parts of filler and 30 parts of water; wherein the polymer emulsion is a polyurethane emulsion with a Tg of -22°C, and the filler is sea sand with a mesh size of 120 meshes; specifically, the preparation method of the water-based paint is: adding filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding polymer emulsion, and dispersing for 30 minutes to obtain the water-based paint.

[0077] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of PET, with a gram weight of 80g / m 2 , the irregular mesh size is 0.05-1.4mm, and the thickness is 0.4mm.

[0078] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0079] Example 5

[0080] Raw materials of anti-stick weather-resistant anti-stick film:

[0081] The water-based paint comprises, by weight, 15 parts of a polymer emulsion, 15 parts of a filler and 30 parts of water; wherein the polymer emulsion is an acrylic emulsion with a Tg of -8°C and a styrene-butadiene emulsion with a Tg of -7°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.3; the filler is sea sand with a grading of 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0.2:0.7:0.3; specifically, the preparation method of the water-based paint is: adding the filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding the polymer emulsion, dispersing for 30 minutes, and obtaining the water-based paint.

[0082] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of PET, with a gram weight of 40g / m 2 , the irregular mesh size is 0.1-1.4mm and the thickness is 0.25mm.

[0083] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0084] Example 6

[0085] Raw materials of anti-stick weather-resistant anti-stick film:

[0086] The water-based paint comprises 15 parts of polymer emulsion, 15 parts of filler and 30 parts of water by weight; wherein the polymer emulsion is an acrylic emulsion with a Tg of -12°C and a styrene-butadiene emulsion with a Tg of -27°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.6; the filler is river sand with a gradation of 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0:0.3:0.7; specifically, the preparation method of the water-based paint is: add the filler to the water, disperse at 1500-2000 r / min for 30 minutes, reduce the speed to 800 r / min, add the polymer emulsion, disperse for 30 minutes, and obtain the water-based paint.

[0087] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of PET, with a gram weight of 50g / m 2 , the irregular mesh size is 0.2-2.0mm and the thickness is 0.35mm.

[0088] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0089] Example 7

[0090] Raw materials of anti-stick weather-resistant anti-stick film:

[0091] The water-based paint comprises 15 parts of polymer emulsion, 15 parts of filler and 30 parts of water by weight; wherein the polymer emulsion is an acrylic emulsion with a Tg of -8°C and a styrene-butadiene emulsion with a Tg of -8°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is mullite sand with a gradation of 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0.1:0.5:0.5; specifically, the preparation method of the water-based paint is: add the filler to the water, disperse at 1500-2000 r / min for 30 minutes, reduce the speed to 800 r / min, add the polymer emulsion, disperse for 30 minutes, and obtain the water-based paint.

[0092] The reinforcing material is a three-dimensional mesh film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd., made of PET, with a gram weight of 30g / m 2 , the irregular mesh size is 0.05-4mm and the thickness is 0.20mm.

[0093] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0094] Example 8

[0095] Raw materials of anti-stick weather-resistant anti-stick film:

[0096] The water-based paint comprises 15 parts of polymer emulsion, 15 parts of filler, 5 parts of internal cross-linking emulsion and 30 parts of water by weight; wherein the polymer emulsion is an acrylic emulsion with a Tg of -5°C and a styrene-butadiene emulsion with a Tg of -22°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is quartz sand with a gradation of 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0.1:0.5:0.5; the internal cross-linking emulsion is a room temperature self-cross-linking pure acrylic emulsion (pure acrylic elastic emulsion, brand: BLJ-968M, Shanghai Baolijia Chemical Co., Ltd.); specifically, the preparation method of the water-based paint is: add filler to water, disperse at 1500-2000r / min for 30min, reduce the speed to 800r / min, add polymer emulsion and internal cross-linking emulsion, disperse for 30min, and obtain the water-based paint.

[0097] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of PET, with a gram weight of 60g / m 2 , the irregular mesh size is 0.05-0.14mm and the thickness is 0.4mm.

[0098] The surface of the reinforcing material is impregnated with an adhesion promoter (alkyl phosphate, article number BETTERSOL7277) and a coupling agent (methyl acryloyl silane, article number KH-570) in a mass ratio of 1:0.5.

[0099] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0100] Example 9

[0101] Raw materials of anti-stick weather-resistant anti-stick film:

[0102] The water-based paint comprises, by weight, 15 parts of a polymer emulsion, 15 parts of a filler, 15 parts of an internally cross-linked emulsion, and 30 parts of water; wherein the polymer emulsion is an acrylic emulsion with a Tg of -10°C and a styrene-butadiene emulsion with a Tg of -7°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is quartz sand with a gradation of 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0.1:0.5:0.5; the internally cross-linked emulsion is a polyurethane modified acrylate emulsion (aliphatic polyurethane acrylate, brand: RU-2210, Shenzhen Ruisheng New Materials Co., Ltd.); specifically, the preparation method of the water-based paint is: adding filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding polymer emulsion and internally cross-linked emulsion, dispersing for 30 minutes, and obtaining the water-based paint.

[0103] The reinforcing material is a three-dimensional mesh porous film (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd., made of PET, with a gram weight of 70g / m 2 , the irregular mesh size is 0.05-2.0mm and the thickness is 0.5mm.

[0104] The surface of the reinforcing material is impregnated with an adhesion promoter (organic titanate, article number TCA-L38) and a coupling agent (aminosilane, article number Z-6020) in a mass ratio of 1:0.8.

[0105] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0106] Example 10

[0107] Raw materials of anti-stick weather-resistant anti-stick film:

[0108] The water-based paint comprises, by weight, 15 parts of polymer emulsion, 15 parts of filler, 10 parts of internal cross-linking emulsion and 30 parts of water; wherein the polymer emulsion is an acrylic emulsion with a Tg of -10°C and a styrene-butadiene emulsion with a Tg of -7°C, and the mass ratio of the acrylic emulsion to the styrene-butadiene emulsion is 1:0.5; the filler is quartz sand with a gradation of 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh = 0.1:0.5:0.5; the internal cross-linking emulsion is a room temperature self-cross-linking styrene-acrylic emulsion (self-cross-linking acrylic emulsion, brand: Joncryl 1980 BASF); specifically, the preparation method of the water-based paint is: adding filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding polymer emulsion and internal cross-linking emulsion, dispersing for 30 minutes, and obtaining the water-based paint.

[0109] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of PET, with a gram weight of 80g / m 2 , the irregular mesh size is 0.05-1.0mm and the thickness is 0.7mm.

[0110] The surface of the reinforcing material is impregnated with an adhesion promoter (organosilane, article number ADP-W450) and a coupling agent (vinyl silane, article number A-171) in a mass ratio of 1:0.6.

[0111] The preparation method of the anti-sticking weather-resistant anti-sticking film is the same as that of Example 1.

[0112] Comparative Example 1

[0113] The difference between this comparative example and Example 3 is that:

[0114] The reinforcing material is a three-dimensional mesh membrane (purchased from Shandong Taipeng Environmental Protection Materials Co., Ltd.), made of EVA, with a gram weight of 100g / m 2 , the irregular mesh size is 0.3-6mm and the thickness is 1mm.

[0115] Comparative Example 2

[0116] The difference between this comparative example and Example 3 is that:

[0117] The raw materials of anti-stick weather-resistant anti-stick films are different:

[0118] The water-based paint comprises, by weight, 35 parts of a polymer emulsion, 5 parts of a filler and 25 parts of water; wherein the polymer emulsion is an acrylic emulsion with a Tg of 5° C., and the filler is river sand with a mesh size of 140 meshes; specifically, the preparation method of the water-based paint is: adding the filler to water, dispersing at 1500-2000 r / min for 30 minutes, reducing the speed to 800 r / min, adding the polymer emulsion, and dispersing for 30 minutes to obtain the water-based paint.

[0119] Comparative Example 3

[0120] The difference between this comparative example and Example 10 is:

[0121] The surface of the reinforcing material is impregnated with an adhesion promoter (organosilane, article number ADP-W452) and a coupling agent (vinyl silane, article number SCA-V71PE) in a mass ratio of 1:1.

[0122] Comparative Example 4

[0123] The difference between this comparative example and Example 10 is:

[0124] The amount of the internal cross-linking emulsion in the water-based coating is 25 parts, and the internal cross-linking emulsion is a self-cross-linking vinyl acetate copolymer emulsion.

[0125] According to the following three methods, the three-layer waterproofing membranes were prepared using the anti-sticking and weather-resistant anti-sticking films of Examples 1-10 and Comparative Examples 1-4, respectively. The specific methods are as follows:

[0126] A. Structure and preparation method of three-layer pre-laid waterproof membrane

[0127] The structure of the three-layer pre-laid waterproofing membrane includes, in sequence, a 0.1 mm cross PE film, a 1.5 mm self-adhesive asphalt, and a 0.1 mm anti-adhesive weather-resistant anti-adhesive film;

[0128] The method for preparing the pre-laid waterproofing coiled material comprises the following steps:

[0129] (1) unwinding, flattening, and deflecting the cross PE film to obtain a main material layer;

[0130] (2) coating self-adhesive asphalt on one side of the main material layer, cooling and lowering the temperature to obtain an adhesive layer;

[0131] (3) spraying the water-based paint of the anti-stick weather-resistant anti-stick film onto the adhesive layer, laying the reinforcing material of the anti-stick weather-resistant anti-stick film on the surface of the water-based paint, and then spraying the water-based paint;

[0132] (5) transporting the sprayed sample to an oven for drying;

[0133] (6) Cooling, lowering the temperature, adjusting the deviation, and rolling up to obtain the pre-laid waterproofing membrane.

[0134] B. Structure and preparation method of a three-layer pre-laid waterproof membrane

[0135] The structure of the three-layer pre-laid waterproofing membrane comprises, in sequence, 1.0 mm HDPE sheet, 0.3 mm pressure-sensitive adhesive and 0.35 mm anti-adhesive weather-resistant anti-adhesive film;

[0136] The method for preparing the pre-laid waterproofing coiled material comprises the following steps:

[0137] (1) Extruding and calendering a HDPE resin material into a sheet, flattening and adjusting the deviation to obtain a main material layer;

[0138] (2) coating a pressure-sensitive adhesive on one side of the main material layer, cooling the layer, and obtaining an adhesive layer;

[0139] (3) Cover the anti-sticking and weather-resistant anti-sticking film on the adhesive layer, adjust the deviation and roll it up to obtain the pre-laid waterproof membrane.

[0140] C. Structure and preparation method of a three-layer pre-laid waterproof membrane

[0141] The structure of the three-layer pre-laid waterproofing membrane comprises, in sequence, 0.8 mm EPDM sheet, 2 mm pressure-sensitive adhesive and 0.5 mm anti-adhesive weather-resistant anti-adhesive film;

[0142] The method for preparing the pre-laid waterproofing coiled material comprises the following steps:

[0143] (1) Unwinding, flattening, and deflecting the EPDM sheet to obtain a main material layer;

[0144] (2) coating a pressure-sensitive adhesive on one side of the main material layer, cooling the layer, and obtaining an adhesive layer;

[0145] (3) spraying the water-based paint of the anti-stick weather-resistant anti-stick film onto the adhesive layer, laying the reinforcing material of the anti-stick weather-resistant anti-stick film on the surface of the water-based paint, and then spraying the water-based paint;

[0146] (5) transporting the sprayed sample to an oven for drying;

[0147] (6) Cooling, lowering the temperature, adjusting the deviation, and rolling up to obtain the pre-laid waterproofing membrane.

[0148] The pre-laid waterproof membranes prepared by the above three methods were marked as AS1-AS10 and AD1-AD4, BS1-BS10 and BD1-BD4, and CS1-CS10 and CD1-CD4, respectively. The peeling strength between the pre-laid waterproof membranes and the post-cast concrete and the peeling strength after immersion in water were tested respectively. The test methods were based on GB / T 23457-2017 Pre-laid Waterproof Membrane.

[0149] At the same time, the pre-laid waterproof membrane thickness test method is used. The operating steps are: first, use a cutter to cut the membrane into thin strips: 20mm-30mm long, 2mm-3mm wide; then place the sample vertically on the stage of the microscope with the cross section facing up, magnify it to an appropriate multiple to take a picture, and measure the thickness of the membrane material in the area without filler.

[0150] The test results are as follows:

[0151] Table 1 Performance of pre-laid waterproof membranes AS1-AS10 and AD1-AD4

[0152]

[0153]

[0154] Table 2 Performance of pre-laid waterproof membrane BS1-BS10 and BD1-BD4

[0155]

[0156]

[0157] Table 3 Performance of pre-laid waterproof membrane CS1-CS10 and CD1-CD4

[0158]

[0159] It can be seen from the above that the three-layer pre-laid waterproof membrane containing the anti-sticking weather-resistant anti-sticking film prepared by the present invention has a strong peeling strength with the post-cast concrete, and the peeling strength is not greatly affected by immersion in water.

[0160] It can be seen from Comparative Example 1 and Example 3 that when the mesh size, thickness and mesh aperture of the reinforcing material are changed and are not within the scope of the present invention, the obtained anti-adhesive weather-resistant anti-adhesive film, the three-layer pre-laid waterproofing membrane prepared by it and the post-cast concrete have a significantly reduced peeling strength after being immersed in water. It can be seen from Comparative Example 2 and Example 3 that when the composition of the water-based coating and the gradation of the filler are changed, the obtained anti-adhesive weather-resistant anti-adhesive film, the three-layer pre-laid waterproofing membrane prepared by it and the post-cast concrete have a significantly reduced peeling strength, and the peeling strength is greatly affected after immersion. It can be seen from Comparative Example 3 and Example 10 that when the reinforcing material is impregnated with an adhesion promoter and a coupling agent of a conventional mass ratio, the obtained anti-adhesive weather-resistant anti-adhesive film, the three-layer pre-laid waterproofing membrane prepared by it and the post-cast concrete have a significantly reduced peeling strength, but the peeling strength is not greatly affected after immersion. It can be seen from Comparative Example 4 and Example 10 that when a conventional internally cross-linked emulsion is used to prepare an anti-sticking and weather-resistant anti-sticking film, the peeling strength between the three-layer pre-laid waterproof membrane prepared therefrom and the post-cast concrete is significantly reduced.

[0161] The above is a further description of the present invention in conjunction with specific embodiments, but these embodiments are merely exemplary and do not constitute any limitation on the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the scope of protection of the present invention.

Claims

1. A three-layer pre-laid waterproofing membrane, characterized in that: The invention comprises a main material layer, an adhesive layer and an anti-sticking weather-resistant anti-sticking film in sequence, wherein the anti-sticking weather-resistant anti-sticking film is a film material prepared from a water-based coating and a reinforcing material, wherein the reinforcing material is a film material of a three-dimensional interpenetrating cross-linked network structure, and the gram weight of the reinforcing material is 12-80 g / m 2 , thickness is 0.05-0.7mm, mesh aperture is 0.01-5mm; The water-based coating comprises, by weight, 10-30 parts of polymer emulsion, 5-20 parts of filler and water. The Tg of the polymer emulsion is less than 0°C; the filler is inorganic particles with a mesh size of 60-120 meshes; The polymer emulsion is at least one of acrylic emulsion, styrene-butadiene emulsion, VAE emulsion and polyurethane emulsion; the filler is at least one of quartz sand, calcium sand, sintered sand, mullite sand, river sand and sea sand.

2. The three-layer pre-laid waterproofing membrane according to claim 1 is characterized in that: The main material layer is a polymer sheet or a polymer film base, and the adhesive layer is a self-adhesive asphalt adhesive or a non-asphalt self-adhesive adhesive.

3. The three-layer pre-laid waterproofing membrane according to claim 1 is characterized in that: The gradation of the filler is 60 mesh-80 mesh: 80-100 mesh: 100-120 mesh=0-0.2:0.3-0.7:0.3-0.

7.

4. The three-layer pre-laid waterproofing membrane according to claim 1 is characterized in that: The surface of the reinforcing material is pretreated with an interface bonding agent; The interface binder is compounded by an adhesion promoter and a coupling agent, wherein the adhesion promoter is at least one of an organic silane, an organic titanate and an alkyl phosphate, and the coupling agent is at least one of a vinyl silane, an amino silane and a methacryloxy silane; The mass ratio of the adhesion promoter to the coupling agent is 1:0.5-0.8; The water-based paint further comprises 5-15 parts by weight of an internal cross-linking emulsion, wherein the internal cross-linking emulsion is at least one of a room temperature self-cross-linking styrene-acrylic emulsion, a polyurethane-modified acrylate emulsion and a room temperature self-cross-linking pure acrylic emulsion.

5. The three-layer pre-laid waterproofing membrane according to claim 1 is characterized in that: The water-based paint also includes at least one of a pigment, a filler, an ultraviolet absorber, a suspending agent, a defoaming agent and a dispersant.

6. The three-layer pre-laid waterproofing membrane according to claim 1 is characterized in that: The method for preparing the anti-sticking weather-resistant anti-sticking film comprises the following steps: S1. Dip the reinforcing material into a water-based coating and scrape off excess coating to a certain thickness; S2, drying the reinforcing material soaked with the water-based coating in step S1 to obtain the anti-sticking and weather-resistant anti-sticking film.

7. The method for preparing the three-layer pre-laid waterproofing membrane according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Coating a glue layer on one side of the main material layer; (2) Covering the anti-sticking and weather-resistant anti-sticking film on the adhesive layer to obtain the pre-laid waterproofing membrane; or (1) Coating a glue layer on one side of the main material layer; (2) Spraying the water-based coating of the anti-stick weather-resistant anti-stick film onto the surface of the adhesive layer, laying the reinforcing material of the anti-stick weather-resistant anti-stick film on the surface of the water-based coating, and then spraying the water-based coating, and drying, to obtain the pre-laid waterproof membrane.

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