Surface layer anti-sticking weather-resistant coating for pre-paved anti-sticking modified asphalt waterproof coiled material, preparation method and coiled material

Abstract

The invention belongs to the field of waterproof coiled materials, and discloses a pre-paved anti-sticking modified asphalt waterproof coiled material surface layer anti-sticking weather-resistant coating, a preparation method and a coiled material. The coating comprises the following components: an organic-inorganic hybrid silicone acrylic emulsion, a self-crosslinking waterborne polyurethane emulsion, emulsified asphalt, water, a composite bactericide, a defoaming agent, an ultraviolet light absorber, a thickening agent, a filler, glass beads and a silane oligomer. The invention solves the problem of aging of an upper modified asphalt self-adhesive material caused by easy falling of inorganic particles, the problem of infirm lap joint of short edges in the construction process, the problems of environmental pollution and potential safety hazards caused by open fire construction of the lap joint edges in the construction process, and the problems of incapability of storage, low production efficiency and the like of the existing anti-sticking weather-resistant coating.

Description

Technical Field

[0001] This invention belongs to the field of waterproof membranes, and more specifically, relates to a surface anti-stick and weather-resistant coating for a pre-laid reverse-adhesive modified bitumen waterproof membrane, its preparation method, and the membrane itself. Background Technology

[0002] Pre-applied reverse-adhesive modified bitumen waterproof membranes can achieve full adhesion to post-poured concrete, exhibiting excellent resistance to water seepage. Utilizing a cold-applied construction process, the substrate requires no drying or primer treatment, allowing direct application in damp environments without the need for an additional protective layer, saving 30%-50% of construction time and offering high efficiency and convenience. The modified bitumen self-adhesive in the pre-applied reverse-adhesive modified bitumen waterproof membrane undergoes a hydration reaction with the post-poured concrete, generating chemical bonds that, combined with mechanical bonding, form an irreversible full adhesion with excellent bonding performance. The peel strength between Oriental Yuhong PSD-520 membrane and concrete exceeds 2.0 N / mm. With the implementation of the GB / T 23457-2017 standard for "Pre-applied Waterproof Membranes," pre-applied reverse-adhesive modified bitumen waterproof membranes have further improved in terms of construction convenience and bonding reliability, gradually becoming the mainstream choice for underground engineering waterproofing.

[0003] The pre-laid reverse-adhesive modified bitumen waterproof membrane uses a polyester base as a carrier, with modified bitumen self-adhesive coating on the upper and lower layers respectively. The surface of the lower modified bitumen self-adhesive layer is covered with a PE film (as a release film), and the surface of the upper modified bitumen self-adhesive layer is covered with a weather-resistant anti-sticking material.

[0004] in: (1) The surface of the upper layer of modified asphalt self-adhesive compound is usually covered with inorganic particles as a weather-resistant and anti-sticking material, such as Figure 1 As shown, however, inorganic particles are prone to detachment during production, transportation, and construction. Inorganic particles cannot completely cover the modified bitumen self-adhesive compound. For some underground projects and open-cut tunnel projects, after laying the pre-laid reverse-adhesive modified bitumen waterproof membrane, steel reinforcement needs to be tied before pouring concrete. During this period, the pre-laid reverse-adhesive modified bitumen waterproof membrane may be directly exposed to sunlight and rain, causing the upper layer of modified bitumen self-adhesive compound to age, thus affecting the reverse adhesion and waterproofing effects. Furthermore, the short-side overlap of the pre-laid reverse-adhesive modified bitumen waterproof membrane requires the inorganic particles to be heated with a flame to sink them into the modified bitumen self-adhesive compound (e.g., ...). Figure 2 As shown), improper operation can lead to risks to the reliability and durability of the overlap, and open flame construction of long and short side overlaps poses smoke pollution and safety hazards, such as... Figure 3 As shown.

[0005] (2) The PE film covering the surface of the lower layer of modified asphalt self-adhesive material is mostly the original film, which is tightly bonded to the modified asphalt self-adhesive material. This leads to two problems: 1) It limits the selectivity of the first-level waterproofing grade that meets the requirements of GB 55030-2022 General Specification for Waterproofing of Building and Municipal Engineering (first-level protection requires the pre-laying of reverse-adhesive modified asphalt waterproof membrane and its composite application with other types of waterproof materials, and the construction during the composite process requires the use of open flame to melt the original PE film, which poses a smoke pollution and safety hazard from asphalt, PE plastic and other materials); 2) It requires the original PE film to be baked and melted with fire when the membrane overlaps, which poses a safety risk and makes it impossible to truly achieve safety and environmental protection.

[0006] Based on the issues raised in (1) and (2), domestic and international researchers are gradually exploring non-inorganic particle anti-sticking and weather-resistant materials that do not require an adhesive release film, and are working towards a completely flameless construction solution. For example: CN109575824A discloses a weather-resistant film for pre-laid waterproof membranes, its preparation method, and its uses. The weather-resistant film is a film-forming coating formed after the water in a water-based coating evaporates. This coating requires drying at 70℃ for 10 minutes (low efficiency), while the operating speed of a modified bitumen membrane production line is 30m / min-60m / min. Based on this calculation, the production line would need to be lengthened by 300m-600m, which the membrane production equipment cannot meet. Furthermore, this coating contains white cement, which must be prepared and used immediately; leftover materials cannot be stored, leading to a significant risk of waste.

[0007] CN116179111A discloses a five-layer pre-laid roofing membrane and its preparation method. The anti-stick and weather-resistant material on its upper surface does not require a removable release film, allowing it to bond with post-poured concrete and facilitating watertight sealing at the overlaps between membranes. The prepared pre-laid roofing membrane maintains excellent adhesion to post-poured concrete even after prolonged water immersion, exhibits good water resistance, and can resist cracking of the anti-stick and weather-resistant material caused by deformation during rough transportation / handling, preventing the coating layer from bonding with the anti-stick layer and hindering unrolling during construction. However, the anti-stick and weather-resistant material in this solution is prepared from water-based coatings and reinforcing materials. The water-based coating is dried at 60-80℃, and can only be rolled up after complete evaporation and cooling to room temperature. This requires additional film drying and winding equipment, increasing personnel and equipment investment, and is not compatible with the production equipment for modified bitumen roofing membranes. Furthermore, the short-side overlap of the pre-laid roll material in this scheme still requires open flame construction, and the short-side overlap effect between the water-based coating and the modified asphalt rubber after baking is not reliable.

[0008] As can be seen from the above, the existing solutions all have problems in production, manufacturing and application, such as low production efficiency, large investment in personnel and equipment, poor feasibility, unsafe and unreliable short-side overlap construction, etc. Therefore, there is an urgent need to provide a new anti-stick and weather-resistant coating for the surface layer of pre-laid reverse-adhesive modified bitumen waterproof membrane. Summary of the Invention

[0009] The purpose of this invention is to address the shortcomings of existing technologies by proposing a surface anti-adhesive and weather-resistant coating for pre-laid reverse-adhesive modified bitumen waterproof membranes, along with its preparation method and the membrane itself. This invention solves the problems of aging of the upper layer of modified bitumen self-adhesive due to the easy shedding of inorganic particles, unreliable short-side overlaps during construction, environmental pollution and safety hazards associated with open-flame construction at overlap edges, and the inability to store and low production efficiency of existing anti-adhesive and weather-resistant coatings.

[0010] To achieve the above objectives, the first aspect of the present invention provides a surface anti-stick and weather-resistant coating for pre-laid anti-adhesion modified bitumen waterproof membrane, the coating comprising the following components: Organic-inorganic hybrid silicone-acrylic emulsions, self-crosslinking waterborne polyurethane emulsions, emulsified asphalt, water, composite bactericides, defoamers, ultraviolet absorbers, thickeners, fillers, glass microspheres, and silane oligomers.

[0011] According to the present invention, preferably, the coating comprises the following components in parts by weight: 25-50 parts of organic-inorganic hybrid silicone-acrylic emulsion, 5-20 parts of self-crosslinking waterborne polyurethane emulsion, 5-30 parts of emulsified asphalt, 5-20 parts of water, 0.1-0.5 parts of composite bactericide, 0.05-0.5 parts of defoamer, 0.1-0.5 parts of ultraviolet absorber, 0.1-5 parts of thickener, 20-40 parts of filler, 1-5 parts of glass microspheres, and 0.1-1 parts of silane oligomer.

[0012] According to the present invention, preferably, the coating comprises the following components in parts by weight: 30-50 parts of organic-inorganic hybrid silicone-acrylic emulsion, 5-15 parts of self-crosslinking waterborne polyurethane emulsion, 5-15 parts of emulsified asphalt, 5-15 parts of water, 0.1-0.5 parts of composite bactericide, 0.1-0.5 parts of defoamer, 0.1-0.5 parts of ultraviolet absorber, 0.1-1 parts of thickener, 20-30 parts of filler, 1-5 parts of glass microspheres, and 0.1-0.5 parts of silane oligomer.

[0013] According to the present invention, preferably, the coating further comprises the following components in parts by weight: 0.2-2 parts of color paste; wherein the color paste is iron red paste and / or iron black paste.

[0014] According to the present invention, preferably, the raw materials of the emulsified asphalt include the following components in parts by weight: 60-65 parts asphalt, 1-3 parts liquid polybutadiene, 0.1-0.5 parts anionic emulsifier, 0.05-0.15 parts sodium hydroxide and 30-40 parts water.

[0015] According to the present invention, preferably, the method for preparing the emulsified asphalt includes: S1: Mix water, anionic emulsifier and sodium hydroxide, and then heat and stir to obtain soap solution; S2: Mix and stir liquid polybutadiene and asphalt heated to a fluid state to obtain modified asphalt; S3: The soap solution is mixed and emulsified with preheated modified asphalt, and then cooled to obtain the emulsified asphalt (solid content of 65%).

[0016] In step S1: the soap solution is obtained by heating to 60-70°C and then stirring.

[0017] In step S2: the stirring speed is 300-500 r / min, and the time is 0.3-1 h.

[0018] In step S3: the temperature of the preheated modified asphalt is 130-150℃; the mass ratio of the soap solution to the preheated modified asphalt is 2:3; and the shear rate of the emulsifier used in the emulsification is 2500 r / min.

[0019] According to the present invention, preferably, the filler is at least one selected from heavy calcium carbonate (preferably 1250 mesh), barium sulfate (preferably 1250 mesh), light calcium carbonate (preferably 1250 mesh), and wollastonite (preferably 1250 mesh).

[0020] According to the present invention, preferably, the composite bactericide is prepared by mixing isothiazolinone derivatives, pyridine derivatives and polyquaternary ammonium salt derivatives. As a preferred embodiment, the composite bactericide is prepared by mixing BIT (1,2-benzisothiazolin-3-one), SPT (sodium pyridinethione), and BDA (polyquaternary ammonium salt-BDA) in a mass ratio of 2:2:1.

[0021] In this invention, the composite bactericide is a combination of long-acting and high-efficiency bactericides, thereby ensuring that the coating of this invention does not deteriorate within one year. This invention uses an antifoaming agent to suppress bubble formation. This invention uses heavy calcium carbonate (preferably 1250 mesh) to improve the hardness and strength of the coating. This invention uses an ultraviolet absorber to improve the ultraviolet aging performance of the coating. This invention uses silane oligomers to improve the adhesion between the coating and the upper modified asphalt self-adhesive (i.e., under high temperature conditions, the silane oligomer undergoes a ring-opening reaction with the carboxyl and hydroxyl groups in the modified asphalt adhesive, forming a strong bond; the silanol groups in the silane oligomer undergo a condensation reaction with the hydroxyl groups in the inorganic fillers of the modified asphalt self-adhesive; both types of reactions can improve the adhesion between the coating and the modified self-adhesive). This invention uses glass microspheres to improve the drying speed.

[0022] The second aspect of the present invention provides a method for preparing the surface anti-adhesive and weather-resistant coating of the pre-laid anti-adhesive modified bitumen waterproof membrane, the preparation method comprising: mixing and stirring the organic-inorganic hybrid silicone-acrylic emulsion, self-crosslinking waterborne polyurethane emulsion, emulsified bitumen, water, composite bactericide, defoamer, ultraviolet absorber, thickener, filler, glass microspheres and silane oligomer to obtain the coating.

[0023] In this invention, as a preferred embodiment, the preparation method of the pre-laid anti-adhesion and weather-resistant coating for the surface layer of the modified bitumen waterproof membrane includes: stirring the organic-inorganic hybrid silicone-acrylic emulsion, self-crosslinking waterborne polyurethane emulsion, emulsified bitumen, water, color paste, composite bactericide, and defoamer at 300-500 r / min for 10 min to obtain a first stirring system; stirring the first stirring system with filler at 600-900 r / min for 25-45 min to obtain a second stirring system; stirring the second stirring system, ultraviolet absorber, and silane oligomer at 600-900 r / min for 5-10 min to obtain a third stirring system; stirring the third stirring system with thickener at 600-900 r / min for 20-30 min, filtering, and obtaining the coating.

[0024] The third aspect of the present invention provides a pre-laid reverse-adhesive modified bitumen waterproof membrane, the waterproof membrane comprising, from top to bottom, a surface coating layer, an upper modified bitumen self-adhesive layer, a polyester base layer, a lower modified bitumen self-adhesive layer, and a lower surface release film layer; The coating material of the surface layer is the coating material described above. The coating material of the surface layer is fully coated on the surface of the upper modified asphalt self-adhesive layer. When the coating material of the surface layer is applied, the temperature of the upper surface of the upper modified asphalt self-adhesive layer is 160-180℃. The lower surface release film is a PE release film.

[0025] According to the present invention, preferably, the operating speed of the production line of the waterproof membrane is 30-50 m / min (that is, the operating distance of the waterproof membrane on the production line is 30-50 m), the drying time of the coating of the surface layer is 5-20 s, and the dry film thickness of the coating of the surface layer is 0.15-0.25 mm.

[0026] In this invention, 10-12 nozzles are arranged in the width direction of the waterproof membrane, and the distance between each nozzle is 8-12cm. The pipeline pressure when the coating of this invention is sprayed from the nozzle is 0.35-0.6MPa, thereby ensuring that the coating of the surface layer is 100% fully adhered to the surface of the upper modified asphalt self-adhesive layer.

[0027] According to the present invention, preferably, the process of coating the upper surface of the upper modified asphalt self-adhesive layer with the coating material of the surface layer is carried out simultaneously with the process of coating the lower surface of the lower modified asphalt self-adhesive layer with the lower surface release film layer.

[0028] According to the present invention, preferably, the short side length of the overlapping edge of the waterproof membrane is 8-10cm, that is, when overlapping, the release film of the waterproof membrane 8-10cm away from the edge of the short side in the length direction is cut off, and it is overlapped, bonded and compacted with the surface coating.

[0029] According to the present invention, preferably, the thickness of the upper modified bitumen self-adhesive layer and the lower modified bitumen self-adhesive layer are each independently >1 mm. The thickness of the waterproof membrane is 3-5 mm.

[0030] In this invention, the materials of the upper modified asphalt self-adhesive and the lower modified asphalt self-adhesive are modified asphalt self-adhesives known to those skilled in the art. As a preferred embodiment, the materials of the upper modified asphalt self-adhesive and the lower modified asphalt self-adhesive are modified asphalt pressure-sensitive self-adhesives.

[0031] According to the present invention, preferably, the unit area mass of the polyester base layer is 250-300 g / m². 2 .

[0032] The beneficial effects of the technical solution of the present invention are as follows: 1) This invention solves the problem of aging of the upper modified asphalt self-adhesive compound caused by the easy shedding of inorganic particles. Specifically, the anti-sticking and weather-resistant coating of this invention can fully adhere to the surface of the upper modified asphalt self-adhesive compound, providing 100% coverage and protection. This effectively solves the problem of inorganic particles easily shedding and failing to achieve 100% protection of the upper modified asphalt self-adhesive compound, thus extending its aging resistance. Simultaneously, the use of the anti-sticking and weather-resistant coating of this invention makes the roll material lighter and improves construction convenience. Furthermore, the coating formed by the anti-stick and weather-resistant coating of the present invention also has the characteristics of stain resistance, weather resistance, water resistance, anti-sticking, self-healing, and wear resistance (that is, the main film-forming substances of the present invention are organic-inorganic hybrid silicone-acrylic emulsion and self-crosslinking waterborne polyurethane emulsion, neither of which contains benzene ring structure, has a stable chemical structure, and can resist the erosion of natural factors such as ultraviolet rays and wind and rain for a long time, maintaining the stability of the coating color and gloss. Moreover, the main film-forming substances of the present invention have late-stage self-crosslinking characteristics and a dense structure. Therefore, the coating formed by the anti-stick and weather-resistant coating of the present invention... It exhibits excellent stain resistance, water resistance, and anti-stick properties; the modified bitumen component in the coating possesses certain creep characteristics, thus enabling self-repair in the micro-crack stage; the coating surface is dense and wear-resistant; the stain resistance, weather resistance, and water resistance of this invention enhance the resistance of the pre-laid reverse-adhesive modified bitumen waterproof membrane to mud and sand pollution, UV aging, and rainwater erosion before concrete pouring; the anti-stick and self-healing features prevent adhesion between membrane layers, thus avoiding difficulties in unrolling; and the wear resistance prevents construction workers from accidentally slipping and falling during construction.

[0033] 2) This invention solves the problem of unreliable short-side overlaps during construction, as well as the environmental pollution and safety hazards caused by open-flame construction at the overlap edges. Specifically, the roll material overlap of this invention can be completed without open flame construction, and the short-side overlap has high reliability. That is, this invention combines the anti-stick weather-resistant coating and the modified asphalt self-adhesive material covered with PE release film, thereby achieving cold-bonding for both short-side and long-side overlaps, without the need for open flame construction or sand settling treatment, thus making it safer, more environmentally friendly, and easier to construct. The anti-stick weather-resistant coating of this invention contains asphalt components, and the modified asphalt self-adhesive material also contains asphalt components. Based on the principle of similar compatibility, the overlap effect of this invention is more superior and reliable, and the peel strength without treatment can reach more than 2.0 N / mm.

[0034] 3) This invention solves the problem of limited selectivity in primary-level waterproofing composite application schemes, as well as the environmental pollution and safety hazards associated with open-flame construction. Specifically, because this invention uses a PE release film as the isolation membrane, the pre-laid reverse-adhesive modified bitumen waterproof membrane of this invention can be used in combination with other types of waterproof materials to form a bottom-up structure of "other types of waterproof materials - pre-laid reverse-adhesive modified bitumen waterproof membrane of this invention - post-poured concrete". Other types of waterproof materials include: non-curing rubber bitumen waterproof coatings, SBS modified bitumen membranes (the lower surface of the pre-laid reverse-adhesive modified bitumen waterproof membrane of this invention is bonded with the upper surface isolation membrane of the SBS modified bitumen membrane), self-adhesive membranes (the lower surface of the pre-laid reverse-adhesive modified bitumen waterproof membrane of this invention is bonded with the upper layer of self-adhesive membrane modification material), and liquid membranes.

[0035] 4) This invention solves the problems of existing anti-stick weather-resistant coatings, such as inability to store, low production efficiency, high personnel input costs, and low equipment modification utilization. Specifically, the anti-stick weather-resistant coating of this invention can be directly coated on the surface of the upper modified asphalt self-adhesive compound at 160-180℃ on the roll production line. The anti-stick weather-resistant coating forms a solid, dense, and continuous coating on the surface of the upper modified asphalt self-adhesive compound rapidly within 5-20 seconds at 160-180℃ (without additional coating drying time). (The mechanism for rapidly forming a solid, dense, and continuous coating is that, under high temperature conditions, the anti-stick weather-resistant coating of this invention is sprayed onto the surface of the modified asphalt compound with high pressure, with a thickness of 0.15-0.25mm, and the film can be formed instantly.) The process involves evaporating moisture, rapidly stacking, extruding, and molding polymer particles, achieving a dry film thickness of 0.15-0.25 mm. The application of the anti-stick and weather-resistant coating on the upper surface and the lamination of the PE release film on the lower surface are carried out simultaneously, thus not affecting the production efficiency of the roll material. The anti-stick and weather-resistant coating of this invention possesses excellent storage stability (the viscosity of the anti-stick and weather-resistant coating of this invention is 500-3000 mPa·s, and the selected powder is a high-mesh powder; therefore, the anti-stick and weather-resistant coating of this invention can be stably suspended and can be used after long-term storage and stirring). After the upper layer of modified asphalt self-adhesive material is coated on the production line, the remaining material of the anti-stick and weather-resistant coating of this invention can be recycled and stored for later use, enabling spraying as needed.

[0036] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0037] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0038] Figure 1 A schematic diagram of the structure of an existing pre-laid reverse-adhesive modified bitumen waterproof membrane is shown.

[0039] Figure 2 The diagram shows the sedimentation treatment for the short-side overlap of an existing pre-laid reverse-adhesive modified bitumen waterproof membrane.

[0040] Figure 3 The diagram shows an open flame construction diagram of the long and short side overlaps of an existing pre-laid reverse-adhesive modified bitumen waterproof membrane.

[0041] Figure 4 A schematic diagram of the structure of a pre-laid reverse-adhesive modified bitumen waterproof membrane provided by the present invention is shown.

[0042] The annotations in the attached figures are explained as follows: 1-1-Overlapping edge of roll material; 1-2-Inorganic particle anti-adhesive layer; 1-3-Upper modified bitumen pressure-sensitive self-adhesive layer; 1-4-Reinforced base; 1-5-Lower modified bitumen pressure-sensitive self-adhesive layer; 1-6-Lower surface release film; 4-1-Top coating; 4-2-Overlapping edge; 4-3-Upper modified bitumen pressure-sensitive self-adhesive layer; 4-4-Polyester base layer; 4-5-Lower modified bitumen pressure-sensitive self-adhesive layer; 4-6-Lower surface release film layer. Detailed Implementation

[0043] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0044] In the following examples and comparative examples: The organic-inorganic hybrid silicone-acrylic emulsion was purchased from Badifu, 9966A. The self-crosslinking waterborne polyurethane emulsion was purchased from Asahi Kasei Chemical Co., Ltd., 7150-A. The glass microspheres were purchased from Zhengzhou Shenglait, HL-25. The silane oligomer was purchased from Dow Corning, Z6040; The ultraviolet absorber is a benzotriazole-based ultraviolet absorber, purchased from BASF's Tinuvin 326; The thickener is a polyurethane thickener, purchased from Dow Chemical, RM-12W; The anionic emulsifier was purchased from Jinyang, AY04 anionic emulsifier; The styrene-acrylic emulsion was purchased from Badifu, FS-675.

[0045] Example 1

[0046] This embodiment provides a surface anti-sticking and weather-resistant coating for pre-laid reverse-adhesive modified bitumen waterproof membrane. The coating comprises the following components by weight: 40 parts organic-inorganic hybrid silicone-acrylic emulsion, 12 parts self-crosslinking waterborne polyurethane emulsion, 15 parts emulsified bitumen, 10 parts water, 0.2 parts composite bactericide, 0.1 parts defoamer, 0.2 parts ultraviolet absorber, 0.7 parts thickener, 22 parts 1250 mesh heavy calcium carbonate, 2 parts glass microspheres, 0.2 parts silane oligomer, and 0.5 parts iron red paste.

[0047] The composite bactericide is prepared by mixing BIT (1,2-benzisothiazolin-3-one), SPT (sodium pyrithione), and BDA (polyquaternium-BDA) in a mass ratio of 2:2:1.

[0048] The raw materials for the emulsified asphalt include the following components by weight: 64 parts of 90# asphalt, 2 parts of liquid polybutadiene, 0.3 parts of anionic emulsifier, 0.1 parts of sodium hydroxide, and 35 parts of water; the preparation method of the emulsified asphalt includes: S1: Mix water, anionic emulsifier and sodium hydroxide, heat to 65°C, and stir to obtain soap solution; S2: Mix liquid polybutadiene with 90# asphalt that has been heated to 135℃ and melted to a fluid state, and stir at 300-500 r / min for 0.5 h to obtain modified asphalt; S3: The soap solution is mixed and emulsified with preheated modified asphalt (the temperature of the preheated modified asphalt is 130-150℃; the mass ratio of the soap solution to the preheated modified asphalt is 2:3; the shear rate of the emulsifier used in the emulsification is 2500r / min), and then cooled to obtain the emulsified asphalt.

[0049] The preparation method of the anti-stick and weather-resistant coating on the surface of the pre-laid reverse-adhesive modified bitumen waterproof membrane in this embodiment includes: stirring the organic-inorganic hybrid silicone-acrylic emulsion, self-crosslinking waterborne polyurethane emulsion, emulsified bitumen, water, iron red paste, composite bactericide and defoamer at 400 r / min for 10 min to obtain a first stirring system; stirring the first stirring system with 800 mesh heavy calcium carbonate at 700 r / min for 30 min to obtain a second stirring system; stirring the second stirring system, ultraviolet absorber and silane oligomer at 700 r / min for 5 min to obtain a third stirring system; stirring the third stirring system with thickener at 700 r / min for 20 min, filtering, and obtaining the coating.

[0050] This embodiment also provides a pre-laid reverse-adhesive modified bitumen waterproof membrane, such as... Figure 4As shown, the waterproof membrane (4mm thick) includes, from top to bottom, a top coating layer 4-1, a long side overlap layer 4-2, an upper modified bitumen pressure-sensitive self-adhesive layer 4-3, a polyester base layer 4-4, a lower modified bitumen pressure-sensitive self-adhesive layer 4-5, and a lower surface release film layer 4-6.

[0051] The coating of the top coating layer 4-1 is the coating described in this embodiment. The coating of the top coating layer is 100% fully adhered to the surface of the upper modified asphalt self-adhesive layer. When the coating of the top coating layer is applied, the temperature of the upper surface of the upper modified asphalt self-adhesive layer is 170°C. The operating speed of the production line of the waterproof membrane is 35 m / min. The drying time of the coating of the top coating layer is 15 s. The dry film thickness of the coating of the top coating layer is 0.20 mm.

[0052] The lower surface release film layer 4-6 is a PE release film. The process of coating the upper surface of the upper modified asphalt self-adhesive layer with the coating material is carried out simultaneously with the process of coating the lower surface release film layer on the lower surface of the lower modified asphalt self-adhesive layer.

[0053] The overlap length of the long side of the overlap edge 4-2 of the waterproof membrane is 10cm.

[0054] The thickness of the upper modified asphalt self-adhesive layer and the lower modified asphalt self-adhesive layer are each 1.1 mm.

[0055] The unit area mass of the polyester base layer is 250 g / m². 2 .

[0056] Example 2

[0057] The difference between this embodiment and Embodiment 1 is only that the coating comprises the following components by weight: 30 parts organic-inorganic hybrid silicone-acrylic emulsion, 15 parts self-crosslinking waterborne polyurethane emulsion, 15 parts emulsified asphalt, 10 parts water, 0.2 parts composite bactericide, 0.1 parts defoamer, 0.2 parts ultraviolet absorber, 0.7 parts thickener, 29 parts 800-mesh heavy calcium carbonate, 2 parts glass microspheres, 0.2 parts silane oligomer, and 0.5 parts iron red paste.

[0058] Example 3

[0059] The difference between this embodiment and Embodiment 1 is only that the coating comprises the following components by weight: 45 parts organic-inorganic hybrid silicone-acrylic emulsion, 5 parts self-crosslinking waterborne polyurethane emulsion, 10 parts emulsified asphalt, 15 parts water, 0.2 parts composite bactericide, 0.1 parts defoamer, 0.4 parts ultraviolet absorber, 1 part thickener, 25 parts 800-mesh heavy calcium carbonate, 2 parts glass microspheres, 0.5 parts silane oligomer, and 0.5 parts iron red paste.

[0060] Comparative Example 1

[0061] This comparative example provides a surface anti-sticking and weather-resistant coating for a pre-laid reverse-adhesive modified bitumen waterproof membrane. The only difference between this comparative example and Example 1 is that the coating comprises the following components by weight: 45 parts styrene-acrylic emulsion, 0 parts self-crosslinking waterborne polyurethane emulsion, 15 parts emulsified bitumen, 10 parts water, 0.2 parts composite bactericide, 0.1 parts defoamer, 0 parts ultraviolet absorber, 1 part thickener, 25 parts 800-mesh heavy calcium carbonate, 2 parts glass microspheres, 0 parts silane oligomer, and 0.5 parts iron red paste.

[0062] Test case

[0063] This test case tests the coatings of the above-described embodiments and comparative examples.

[0064] The test method is GB / T 23457-2017; The test results are shown in Table 1.

[0065] Table 1

[0066] As shown in Table 1: 1. The peel performance of the three embodiments after heat treatment, ultraviolet treatment, and mud and sand treatment, as well as the peel performance after water immersion after being combined with post-cast concrete, are all higher than those of the comparative examples. This indicates that the main film-forming substances used in this invention (organic-inorganic hybrid silicone-acrylic emulsion and self-crosslinking waterborne polyurethane emulsion) have innovative and practical properties in terms of weather resistance, aging resistance, water resistance, and stain resistance. The peel strength of the untreated embodiments is higher than that of the comparative examples, indicating that the bonding promoter (silane oligomer) designed in this invention also plays a role in improving the peel performance without treatment.

[0067] The peel strength of the top coating of the roll material and the modified bitumen pressure-sensitive self-adhesive compound of the roll material in the two and three embodiments is relatively high, indicating that the overlapping effect of the roll material of the present invention is relatively reliable and there is no risk of water seepage at the overlapping edge.

[0068] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A pre-paved anti-stick modified bitumen waterproofing membrane surface layer anti-stick weather resistant coating, characterized in that, The coating comprises the following components: The organic-inorganic hybrid silicone acrylic emulsion, the self-crosslinking waterborne polyurethane emulsion, the emulsified asphalt, water, the composite bactericide, the defoaming agent, the ultraviolet absorber, the thickening agent, the filler, the glass microbead and the silane oligomer.

2. The pre-ply anti-stick modified bitumen waterproofing membrane surface layer anti-stick weatherable coating of claim 1, wherein, The coating comprises the following components in parts by weight: the organic-inorganic hybrid silicone acrylic emulsion 25-50 parts, the self-crosslinking waterborne polyurethane emulsion 5-20 parts, the emulsified asphalt 5-30 parts, water 5-20 parts, the composite bactericide 0.1-0.5 parts, the defoaming agent 0.05-0.5 parts, the ultraviolet absorber 0.1-0.5 parts, the thickening agent 0.1-5 parts, the filler 20-40 parts, the glass microbead 1-5 parts and the silane oligomer 0.1-1 part. Preferably, the coating comprises the following components in parts by weight: the organic-inorganic hybrid silicone acrylic emulsion 30-50 parts, the self-crosslinking waterborne polyurethane emulsion 5-15 parts, the emulsified asphalt 5-15 parts, water 5-15 parts, the composite bactericide 0.1-0.5 parts, the defoaming agent 0.1-0.5 parts, the ultraviolet absorber 0.1-0.5 parts, the thickening agent 0.1-1 part, the filler 20-30 parts, the glass microbead 1-5 parts and the silane oligomer 0.1-0.5 part.

3. The pre-ply anti-stick modified bitumen waterproofing membrane surface layer anti-stick weatherable coating of claim 1, wherein, The coating further comprises the following components in parts by weight: color paste 0.2-2 parts; the color paste is iron red color paste and / or iron black color paste.

4. The pre-rubbed, modified asphaltic waterproofing membrane surface release weatherable coating of claim 1, wherein, The raw materials of the emulsified asphalt comprise the following components in parts by weight: asphalt 60-65 parts, liquid polybutadiene 1-3 parts, anionic emulsifier 0.1-0.5 parts, sodium hydroxide 0.05-0.15 parts and water 30-40 parts. The preparation method of the emulsified asphalt comprises: S1: mixing water, anionic emulsifier and sodium hydroxide, heating and stirring to obtain a soap solution; S2: mixing liquid polybutadiene and asphalt heated and melted to a flow state, and stirring to obtain modified asphalt; S3: mixing and emulsifying the soap solution with the preheated modified asphalt, and cooling to obtain the emulsified asphalt.

5. The weather-resistant coating for the surface layer of the pre-laid anti-sticking modified asphalt waterproof roll material according to claim 1, wherein, The filler is at least one of heavy calcium, barium sulfate, light calcium and wollastonite; The composite bactericide is prepared by mixing isothiazolinone derivatives, pyridine derivatives and polyquaternary ammonium salt derivatives.

6. The method of producing a surface release weatherable coating for pre- installed, reverse-stick modified bitumen waterproofing membranes according to any one of claims 1 to 5, characterized in that, The preparation method comprises: mixing the organic-inorganic hybrid silicone acrylic emulsion, the self-crosslinking waterborne polyurethane emulsion, the emulsified asphalt, water, the composite bactericide, the defoaming agent, the ultraviolet absorber, the thickening agent, the filler, the glass microbead and the silane oligomer, and stirring to obtain the coating.

7. A pre-paved, reverse-stick modified bituminous waterproofing membrane, characterized in that, The waterproof roll material comprises, from top to bottom, a surface coating layer, an upper layer of modified asphalt self-adhesive material layer, a polyester base layer, a lower layer of modified asphalt self-adhesive material layer and a lower surface release film layer; The coating of the surface coating layer is the coating according to any one of claims 1-5, and the coating of the surface coating layer is fully coated on the surface of the upper layer of modified asphalt self-adhesive material layer; and when the coating of the surface coating layer is coated, the temperature of the upper surface of the upper layer of modified asphalt self-adhesive material layer is 160-180℃; The lower surface release film layer is a PE release film.

8. The pre-ply reverse-stick modified bitumen waterproofing membrane of claim 7, wherein, The production line of the waterproofing membrane has a running speed of 30-50 m / min, the coating of the surface coating has a drying time of 5-20 s, and the dry film thickness of the coating of the surface coating is 0.15-0.25 mm.

9. The pre-laid reverse-stick modified bitumen waterproofing membrane according to claim 7, wherein, The process of coating the coating of the surface coating on the upper surface of the upper modified asphalt self-adhesive layer is simultaneously performed with the process of covering the lower surface of the lower modified asphalt self-adhesive layer with the lower surface release film layer.

10. The pre-paved reverse-stuck modified asphalt waterproofing membrane according to claim 7, wherein, The short edge length of the lapped edge of the waterproofing membrane is 8-10 cm; The thickness of each of the upper modified asphalt self-adhesive layer and the lower modified asphalt self-adhesive layer is independently >1 mm; The unit area mass of the polyester carcass layer is 250-300 g / m 2 .

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