Self-adhesive modified asphalt sizing material and preparation method thereof, self-adhesive modified asphalt waterproof coiled material and preparation method and application of self-adhesive modified asphalt waterproof coiled material

Abstract

The invention provides a self-adhesive modified asphalt sizing material and a preparation method thereof, a self-adhesive modified asphalt waterproof coiled material and a preparation method and application thereof, and belongs to the technical field of building waterproof materials. The self-adhesive modified asphalt sizing material comprises the following components in parts by weight: 45-60 parts of matrix asphalt, 4-8 parts of an SBS modifier, 8-15 parts of an aromatic oil slow-release rubber modifier, 1-8 parts of a rubber modifier, 0.2-4 parts of an alcohol ether additive, 10-20 parts of filler and 1-3 parts of tackifying resin, wherein the rubber modifier comprises at least one of SIS and SBR.

Description

Technical Field

[0001] This invention belongs to the field of building waterproofing materials technology, specifically relating to a self-adhesive modified bitumen adhesive and its preparation method, a self-adhesive modified bitumen waterproof membrane and its preparation method and application. Background Technology

[0002] With the decrease in the number of newly built houses, the construction market is gradually transitioning from a focus on new construction to a post-construction era dominated by the renovation and maintenance of existing buildings. Against this backdrop, ease of construction has become a key demand trend for waterproofing products used in maintenance. Self-adhesive bitumen waterproofing membranes, as cold-applied construction products, are receiving increasing attention in practical applications due to their advantages such as convenient construction, safety, and environmental friendliness.

[0003] However, self-adhesive modified bitumen is temperature sensitive, and its adhesive properties change with temperature: in low-temperature environments (<5℃), self-adhesive modified bitumen is prone to losing its adhesiveness, leading to the risk of adhesion failure between the self-adhesive modified bitumen and the upper surface membrane of the self-adhesive modified bitumen waterproof membrane. This is especially true when the self-adhesive modified bitumen waterproof membrane is used in exposed environments, where problems such as membrane detachment are likely to occur in cold winters. At the same time, as the service life of the self-adhesive modified bitumen waterproof membrane extends, the self-adhesive modified bitumen will gradually age, leading to a decrease in adhesiveness. After long-term use, there is also a risk of separation between the self-adhesive modified bitumen layer and the membrane, affecting the waterproof performance and service life of the self-adhesive modified bitumen waterproof membrane. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a self-adhesive modified bitumen compound and its preparation method, a self-adhesive modified bitumen waterproof membrane and its preparation method, and its application, aiming to at least partially solve the above-mentioned technical problems. The specific technical solutions provided by this invention are as follows.

[0005] As a first aspect of the present invention, a self-adhesive modified asphalt compound is provided, comprising the following components in parts by weight: 45-60 parts of base asphalt, 4-8 parts of SBS modifier, 8-15 parts of aromatic oil slow-release rubber modifier, 1-8 parts of rubber modifier, 0.2-4 parts of alcohol ether additive, 10-20 parts of filler, and 1-3 parts of tackifying resin; wherein the rubber modifier includes at least one of SIS and SBR.

[0006] As a second aspect of the present invention, a method for preparing a self-adhesive modified asphalt compound is provided, comprising: sequentially adding an SBS modifier, a rubber modifier, a tackifying resin, an alcohol ether additive, a filler, and an aromatic oil slow-release rubber modifier to heated base asphalt and stirring and dispersing the mixture to obtain a self-adhesive modified asphalt compound.

[0007] As a third aspect of the present invention, a self-adhesive modified bitumen waterproof membrane is provided, comprising, from top to bottom: a functional composite membrane layer, an bitumen layer, and a release membrane layer; wherein, the bitumen layer is coated with the aforementioned self-adhesive modified bitumen adhesive; the functional composite membrane layer is formed by bonding a functional layer, a barrier layer, and an interface layer together from top to bottom; the interface layer is a surface-modified polyethylene terephthalate film, the barrier layer is a metal foil, and the functional layer is a non-woven fabric.

[0008] As a fourth aspect of the present invention, a method for preparing a self-adhesive modified bitumen waterproof membrane is provided, comprising: coating a self-adhesive bitumen adhesive onto the interface layer of a functional composite membrane layer and then covering it with a release film to obtain a self-adhesive modified bitumen waterproof membrane.

[0009] As a fifth aspect of the present invention, an application of a self-adhesive modified bitumen waterproof membrane is provided, comprising: laying the self-adhesive modified bitumen waterproof membrane on a substrate surface, and applying a waterproof coating to the functional layer surface of the functional composite membrane layer; wherein the waterproof coating is selected from any one of acrylic coatings, polyurethane coatings, polyurea coatings, silane coatings, and polyaspartic acid ester coatings.

[0010] Based on the above technical solutions, the self-adhesive modified bitumen compound and its preparation method, the self-adhesive modified bitumen waterproof membrane and its preparation method and application provided by the present invention have at least one of the following beneficial effects.

[0011] (1) In the embodiments of the present invention, the self-adhesive modified asphalt compound and its preparation method of the present invention have significant technical effects: by scientifically proportioning the base asphalt, SBS modifier, aromatic oil slow-release rubber particle modifier and other components, the advantages of each raw material are synergistically utilized—the SBS modifier improves the mechanical properties and weather resistance of the self-adhesive modified asphalt compound (hereinafter referred to as the compound); the aromatic oil slow-release rubber modifier can slowly release aromatic oils to compensate for the aging performance degradation caused by the volatilization of light components during long-term service; the rubber modifier enhances low-temperature adhesion and flexibility; and the alcohol ether additives ensure the uniform dispersion and compatibility of the aromatic oil slow-release rubber modifier in the compound system. The preparation process ensures that the raw materials are fully integrated by adding the components step by step and stirring and dispersing, thereby improving the bonding reliability; at the same time, it effectively improves the problem of insufficient adhesion at low temperature (<5℃), and can still maintain good adhesion and low-temperature (<5℃) performance after long-term service, providing high-performance and long-life core material support for waterproof membranes.

[0012] (2) In the embodiments of the present invention, the self-adhesive modified bitumen waterproof membrane (hereinafter referred to as waterproof membrane) of the present invention achieves excellent technical effects through layered synergistic design: in the top-down structure of functional composite membrane layer, bitumen layer and isolation membrane layer, the bitumen layer adopts a self-adhesive modified bitumen adhesive with a specific formulation, whose excellent low-temperature adhesion and anti-aging performance provide core bonding and waterproof guarantee for the waterproof membrane; the functional composite membrane layer plays a multi-layer synergistic role through the gradient composite of functional layer, barrier layer and interface layer. Among them, the interface layer adopts surface modified polyethylene terephthalate film, which significantly improves the interfacial bonding strength with the bitumen layer and avoids interlayer separation at low temperature or long-term service; the barrier layer can effectively block oxygen, water vapor and ultraviolet rays, and delay the aging of the bitumen layer; the functional layer provides a good adhesion substrate for the subsequent waterproof coating and enhances the compatibility with the external waterproof system. The synergistic effect of the three-layer structure in the functional composite membrane enables the waterproof membrane to not only solve the problem of insufficient adhesion between self-adhesive bitumen and membrane material at low temperatures, but also ensure good adhesion and structural integrity after long-term service through barrier protection and the anti-aging design of the adhesive itself, ultimately achieving high reliability and long durability of the waterproof system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the self-adhesive modified bitumen waterproof membrane structure in an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the functional composite film structure in an embodiment of the present invention;

[0015] Figure 3 This is a scanning electron microscope image of a PET film coated with an acrylic frosted coating in an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] In the process of realizing the concept of this invention, it was found that self-adhesive modified bitumen waterproof membranes still face two major problems in practical applications: On the one hand, in low-temperature (<5℃) environments, self-adhesive modified bitumen is prone to lose its adhesiveness due to temperature sensitivity, resulting in failure to bond with the upper surface membrane, especially when used in the open, the membrane is prone to falling off; on the other hand, after long-term service, self-adhesive modified bitumen will experience performance degradation due to aging, which will lead to the separation of the self-adhesive bitumen layer from the membrane, seriously affecting the reliability of the waterproof membrane.

[0018] In the existing technology, although there are solutions that use environmentally friendly self-adhesive layers, activate related adhesive layers and polyethylene terephthalate (PET) film to form chemical bonds between the self-adhesive material and the PET film to avoid low-temperature separation, this solution uses non-asphalt-based self-adhesive materials and cannot be directly applied to asphalt-based self-adhesive waterproof membrane systems.

[0019] Based on this, the present invention provides a self-adhesive modified asphalt compound and its preparation method, a self-adhesive modified asphalt waterproof membrane and its preparation method, and its application. The composition of the self-adhesive modified asphalt compound is designed by using an aromatic oil-based slow-release rubber particle modifier to compensate for the aging performance degradation of the asphalt compound caused by the volatilization of light components during long-term service. Simultaneously, an alcohol ether additive is introduced to improve the dispersibility and compatibility of the aromatic oil-based slow-release rubber particle modifier in the self-adhesive modified asphalt compound system.

[0020] As a first aspect of the present invention, a self-adhesive modified asphalt compound is provided, comprising the following components in parts by weight: 45-60 parts of base asphalt, 4-8 parts of SBS modifier, 8-15 parts of aromatic oil slow-release rubber modifier, 1-8 parts of rubber modifier, 0.2-4 parts of alcohol ether additive, 10-20 parts of filler, and 1-3 parts of tackifying resin; wherein the rubber modifier includes at least one of SIS and SBR.

[0021] In this embodiment of the invention, the SBS modifier improves mechanical properties and weather resistance, the aromatic oil slow-release rubber modifier slows down the oil content to compensate for aging degradation during long-term service, the rubber modifier enhances low-temperature viscosity and flexibility, and the alcohol ether additive ensures dispersion compatibility. Through the adaptation of each component, the rubber compound exhibits cohesive destructive peeling at room temperature, maintains stable low-temperature viscosity, and retains good performance even after long-term use, effectively avoiding the risk of interlayer separation.

[0022] According to an embodiment of the present invention, an aromatic oil slow-release rubber modifier is prepared by the following method: rubber powder is added to preheated aromatic oil, and a development treatment is carried out under stirring conditions to allow the rubber powder to absorb the aromatic oil, thereby obtaining oil-absorbing rubber powder; the oil-absorbing rubber powder is subjected to surface degreasing treatment, and after washing, drying, coating and drying again, the aromatic oil slow-release rubber modifier is obtained; wherein, the coating treatment includes first applying a solution containing a silane coupling agent, drying, and then applying a coating solution layer by layer to form a porous coating film on the surface of the oil-absorbing rubber powder.

[0023] In this embodiment of the invention, the aromatic oil slow-release rubber modifier prepared by the present invention absorbs aromatic oil through rubber powder and undergoes surface degreasing (aromatic oil) and coating treatment. The silane coupling agent can improve the compatibility with the matrix, and the porous coating film realizes the slow release of aromatic oil. It can continuously compensate for the aging and degradation caused by the volatilization of light components during the long-term service of self-adhesive modified asphalt rubber, while improving the dispersion stability of the aromatic oil slow-release rubber modifier in the system, providing long-term performance guarantee for the rubber compound.

[0024] According to embodiments of the present invention, the coating solution is an aqueous solution of nano-silica. The silane coupling agent includes any one of aminosilane, epoxysilane, and vinylsilane. Preferably, the silica content in the nano-silica aqueous solution is 25-30 wt%, and the silane coupling agent content in the solution containing the silane coupling agent is 15-23 wt%. The rubber powder has a particle size of 50-80 mesh. The preheating temperature is 140-160°C. The development treatment time is 3-5 hours. The drying temperature is 80-110°C.

[0025] Specifically, 50-80 mesh rubber powder is preheated in aromatic oil at 140-160℃ for 3-5 hours to fully develop and absorb oil, and then dried at 80-110℃. It is then coated with silane coupling agents such as aminosilane and nano silica aqueous solution. This ensures that the rubber powder fully absorbs oil and achieves long-term slow release of aromatic oil through a porous coating membrane, which enhances compatibility with the matrix, effectively delays asphalt aging, and ensures the long-term performance stability of the rubber compound.

[0026] According to embodiments of the present invention, the base asphalt is at least one of 70# asphalt and 90# asphalt. The SBS is star-shaped SBS, and the styrene content in the SBS is 30wt%. The alcohol ether additive includes C12-C18 fatty alcohol polyoxyethylene ether. The filler is at least one of heavy calcium carbonate, light calcium carbonate, talc, and stone powder. The tackifying resin includes at least one of petroleum resin and rosin resin.

[0027] In this embodiment of the invention, 70# asphalt and 90# asphalt are used as the base matrix, and star-shaped SBS with a styrene content of 30wt% is added to enhance the mechanical properties and stability of the adhesive. C12-C18 fatty alcohol polyoxyethylene ether ensures the compatibility and dispersibility of the components, fillers such as heavy calcium carbonate optimize the mechanical properties, and tackifying resins such as petroleum resin improve the viscosity. The synergistic effect of the raw materials further enhances the low-temperature viscosity, anti-aging properties and bonding reliability of the adhesive, ensuring the long-term performance of the waterproof membrane.

[0028] As a second aspect of the present invention, a method for preparing a self-adhesive modified asphalt compound is provided, comprising: sequentially adding an SBS modifier, a rubber modifier, a tackifying resin, an alcohol ether additive, a filler, and an aromatic oil slow-release rubber modifier to heated base asphalt and stirring and dispersing the mixture to obtain a self-adhesive modified asphalt compound.

[0029] In this embodiment of the invention, the SBS modifier is first allowed to fully react with the base asphalt to establish the foundation for mechanical properties. Then, rubber modifiers and tackifying resins are gradually introduced to precisely control viscosity and flexibility. Finally, fillers and aromatic oil-based slow-release rubber modifiers are added to optimize system stability. This process ensures that all components work synergistically, resulting in a final adhesive compound with excellent low-temperature (<5°C) viscosity, anti-aging properties, and uniform dispersion, providing a reliable guarantee for the performance of the waterproof membrane.

[0030] In some embodiments, the preparation method of self-adhesive modified asphalt compound includes: placing base asphalt in a stirring device and heating it to 165-175°C; adding SBS modifier and rubber modifier sequentially to the heated asphalt and stirring and dispersing for 3.5-4.5 hours; then cooling it to 145-155°C; adding tackifying resin and alcohol ether additive sequentially and stirring and dispersing for 0.5-1 hours; then adding filler and aromatic oil slow-release rubber modifier sequentially at this temperature and continuing to stir and disperse for 0.5-1 hours to obtain self-adhesive modified asphalt compound.

[0031] Figure 1 This is a schematic diagram of the self-adhesive modified bitumen waterproof membrane structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the functional composite film structure in an embodiment of the present invention.

[0032] As a third aspect of the present invention, a self-adhesive modified bitumen waterproof membrane is provided, such as... Figures 1-2 As shown, from top to bottom, it includes: a functional composite membrane layer 1, an asphalt layer 2, and a release membrane layer 3; wherein, the asphalt layer 2 is coated with the aforementioned self-adhesive modified asphalt adhesive; as Figure 2 As shown, the functional composite film layer 1 is composed of a functional layer 11, a barrier layer 12 and an interface layer 13 bonded together from top to bottom; the interface layer 13 is a surface-modified polyethylene terephthalate film, the barrier layer 12 is a metal foil, and the functional layer 11 is a non-woven fabric.

[0033] In this embodiment of the invention, in the functional composite membrane layer 1, the surface of the interface layer 13 is modified with polyethylene terephthalate film, which has a three-dimensional structure. At high temperature, self-adhesive asphalt can flow into its three-dimensional structure to form physical bonding and interlocking, thus solving the problem of adhesion failure between the membrane material and the asphalt when the asphalt loses its adhesion. The metal foil barrier layer 12 is oxygen-barrier and waterproof, and the non-woven functional layer 11 enhances the bonding with the external waterproof coating. The multi-layer synergy ensures the long-term performance stability of the waterproof membrane.

[0034] According to embodiments of the present invention, the surface-modified polyethylene terephthalate (PET) film is selected from any one of PET films coated with a frosted coating and PET films with mechanically modified surfaces. The metal foil is selected from any one of aluminum foil, copper foil, and stainless steel foil, preferably aluminum foil. The nonwoven fabric is selected from any one of polyester, polypropylene, and polypropylene-polyethylene materials. The barrier layer is selected from any one of polyethylene film, polypropylene film, PET film, polyamide-polypropylene co-extruded film, and polyamide-polyethylene co-extruded film. The thickness of the interface layer is 50-150 μm, preferably 90-110 μm. The thickness of the barrier layer is 7-12 μm. The basis weight of the nonwoven fabric is 20-90 g / m². 2 Preferably 60-80g / m 2 The thickness of the asphalt layer is 0.5-2.5 mm.

[0035] In this embodiment of the invention, the interface layer uses a frosted or mechanically modified polyethylene terephthalate film with controlled thickness, significantly improving the adhesion strength with the asphalt layer. The barrier layer uses metal foil such as aluminum foil with controlled thickness, effectively blocking oxygen, moisture, and ultraviolet rays to delay the aging of the asphalt layer. The functional layer uses non-woven fabric such as polyester with controlled basis weight, providing a good adhesion base for the waterproof coating. The diverse selection of the release membrane layer ensures storage stability. Combined with the asphalt layer, the multi-layer synergistic effect effectively solves the problems of low-temperature adhesion failure and long-term service performance degradation, greatly improving the overall waterproof performance and service life of the waterproof membrane.

[0036] According to an embodiment of the present invention, the self-adhesive modified bitumen waterproof membrane further includes: an edge reinforcement layer, embedded inside the bitumen layer and symmetrically distributed on both sides of the middle part of the bitumen layer, extending along the edge of the self-adhesive modified bitumen waterproof membrane, for enhancing the structural strength and damage resistance of the edge of the self-adhesive modified bitumen waterproof membrane; wherein, the edge reinforcement layer is selected from any one of glass fiber mesh and polyethylene terephthalate film; the thickness of the edge reinforcement layer is 0.1-0.4 mm.

[0037] In this embodiment of the invention, the edge reinforcement layer is made of glass fiber mesh or polyethylene terephthalate film, symmetrically distributed on both sides of the middle part of the asphalt layer and extending along the edge of the waterproof membrane. This can specifically enhance the structural strength and damage resistance of the edge of the waterproof membrane, effectively resisting tearing and damage caused by external forces during construction and service, avoiding the decline in overall waterproof performance due to edge failure, and working in synergy with other structural layers of the waterproof membrane to further ensure the long-term reliability of the waterproof membrane under complex working conditions.

[0038] As a fourth aspect of the present invention, a method for preparing a self-adhesive modified bitumen waterproof membrane is provided, comprising: coating a self-adhesive bitumen adhesive onto the interface layer of a functional composite membrane layer and then covering it with a release film to obtain a self-adhesive modified bitumen waterproof membrane.

[0039] In this embodiment of the invention, a self-adhesive asphalt adhesive is coated onto the interface layer of the functional composite membrane and then covered with a release liner to ensure a tight bond between the layers. The coating process allows the asphalt adhesive to fully contact the interface layer, leveraging the modified properties of the interface layer to strengthen the bond, while the release liner ensures the stability of the adhesive's performance. This method is simple to operate, allows for precise control of the bonding state of each layer, enables the various structures of the waterproof membrane to work synergistically, effectively improves waterproof performance and anti-aging capabilities, and ensures stable quality of the waterproof membrane.

[0040] In some embodiments, the preparation method of self-adhesive modified bitumen waterproof membrane includes: unfolding a functional composite membrane layer with an edge release film attached to one side of the functional layer (to prevent overflow when applying adhesive and to be removed during winding); coating the surface of the interface layer with self-adhesive modified bitumen adhesive at 150-160°C; and simultaneously composite an overlap edge reinforcement layer; coating a second layer of self-adhesive modified bitumen adhesive on this basis; after the self-adhesive modified bitumen adhesive cools, composite a release film to form a protective layer; and after adjusting to ensure that each layer is aligned, winding to obtain self-adhesive modified bitumen waterproof membrane.

[0041] As a fifth aspect of the present invention, an application of a self-adhesive modified bitumen waterproof membrane is provided, comprising: laying the self-adhesive modified bitumen waterproof membrane on a substrate surface, and applying a waterproof coating to the functional layer surface of the functional composite membrane layer; wherein the waterproof coating is selected from any one of acrylic coatings, polyurethane coatings, polyurea coatings, silane coatings, and polyaspartic acid ester coatings.

[0042] In this embodiment of the invention, after the self-adhesive modified bitumen waterproof membrane is laid on the substrate surface, an acrylic coating or other waterproof coating is directly applied to the functional layer surface of the functional composite membrane layer, forming a system in which the waterproof membrane and the exposed waterproof coating are directly bonded together, suitable for roof use. This application differs from the existing process of first applying a waterproof coating to the wall and then laying the waterproof membrane. The waterproof coating layer and the functional composite membrane layer are firmly bonded, and the oil in the bitumen adhesive will not penetrate into the waterproof coating layer, which facilitates maintenance and enhances waterproof performance, expanding the construction method for the combined use of waterproof membranes and waterproof coatings. At the same time, it provides a waterproof membrane and waterproof coating composite waterproof system for roof maintenance, which is more convenient to construct, saves construction time, and effectively improves the reliability and applicability of the waterproof system.

[0043] This invention addresses the problems of self-adhesive bitumen waterproof membranes at low temperatures (<5℃) and during long-term service. It employs a systematic design from two dimensions: functional membrane material and self-adhesive modified bitumen compound. By optimizing the formulation of the self-adhesive modified bitumen compound and designing the structure of the upper surface membrane, it solves the problems of weak adhesion between the self-adhesive bitumen and the upper surface membrane at low temperatures and performance degradation of the self-adhesive bitumen after long-term service. This results in the self-adhesive bitumen exhibiting cohesive failure when the waterproof membrane peels off from the substrate at room temperature, ensuring that the waterproof membrane maintains its adhesion and excellent low-temperature performance even after long-term service, thus avoiding the risk of separation between the bitumen layer and the membrane. Simultaneously, this invention provides a waterproofing system combining self-adhesive modified bitumen waterproof membrane and waterproof coating, which offers more convenient construction and saves construction time, providing an efficient solution for related engineering applications.

[0044] The present invention will be further illustrated below through embodiments and related test experiments. In the following detailed description, numerous specific details are set forth for ease of explanation to provide a comprehensive understanding of the embodiments of the present invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Moreover, the details in the following embodiments can be arbitrarily combined to form other feasible embodiments without conflict. All instruments, consumables, and reagents used in the following embodiments are commercially available unless otherwise specified.

[0045] Example 1

[0046] The self-adhesive modified bitumen waterproof membrane provided in this embodiment 1 includes a functional composite membrane layer, an bitumen layer, and a release membrane layer arranged sequentially from top to bottom. The functional composite membrane layer is formed by bonding the functional layer, the barrier layer, and the interface layer sequentially from top to bottom using polyurethane adhesive.

[0047] The functional layer is 60g / m 2 The material is a polyester nonwoven fabric with a 7μm thick aluminum foil barrier layer and a 0.1mm thick mechanically surface-modified PET film as the interface layer. The release liner is a 4μm thick polypropylene release liner.

[0048] The raw materials for self-adhesive modified asphalt rubber compound include: 45 parts of 70# asphalt, 5 parts of SBS modifier, 10 parts of aromatic oil slow-release rubber modifier, 4 parts of SIS modifier, 3 parts of tetradecyl alcohol polyoxyethylene ether, 10 parts of heavy calcium carbonate, and 1 part of C5 petroleum resin.

[0049] Self-adhesive modified bitumen waterproof membrane is prepared by the following method:

[0050] (1) Preparation of aromatic oil slow-release rubber modifier

[0051] Mechanically crushed tire rubber powder is sieved to obtain 60-mesh rubber powder. Aromatic oil is heated to 150℃, and the sieved rubber powder is added to the aromatic oil in stages to develop and fully absorb the oil, accompanied by low-speed stirring for 4 hours. The developed rubber powder is then centrifuged at high speed to remove the oil adhering to the surface, and then washed in a cleaning solution tank. The washed rubber powder is then placed in a fluidized bed for a drying-coating-drying process. The drying temperature is 80-110℃, and the coating process involves first spraying a 20wt% aminosilane solution, and after drying, spraying a 25wt% nano-silica aqueous solution layer by layer at a spray rate of 5-15mL / min to form a porous wall material coating film. After drying, the aromatic oil slow-release rubber modifier is obtained.

[0052] (2) Preparation of self-adhesive modified asphalt compound

[0053] Weigh out 70# asphalt according to the ratio and place it in a mixing tank. Heat the asphalt to 170℃, then gradually add SBS modifier and SIS modifier and stir and disperse for 4 hours. Then lower the temperature to 150℃, add C5 petroleum resin and tetradecyl alcohol polyoxyethylene ether and stir and disperse for 45 minutes. Then control the temperature to maintain at 150℃, add heavy calcium carbonate and aromatic oil slow-release rubber modifier and stir and disperse for 45 minutes to obtain self-adhesive modified asphalt compound.

[0054] (3) Preparation of self-adhesive modified bitumen waterproof membrane

[0055] Unfold the functional composite membrane layer with an edge isolation film attached to one side of the functional layer, coat the surface of the interface layer with a self-adhesive modified bitumen adhesive at 160℃, and simultaneously composite and overlap glass fiber mesh cloth; on this basis, apply a second layer of self-adhesive modified bitumen adhesive, and after the self-adhesive modified bitumen adhesive cools, composite polypropylene film is formed to form a protective layer. After adjusting to ensure that each layer is aligned, it is rolled up to obtain a self-adhesive modified bitumen waterproof membrane.

[0056] Example 2

[0057] The method for preparing the self-adhesive modified bitumen waterproof membrane in Example 2 is the same as in Example 1, except that the functional layer has a strength of 80 g / m². 2 The self-adhesive modified asphalt compound consists of: 60 parts of 70# asphalt, 8 parts of SBS modifier, 10 parts of aromatic oil slow-release rubber modifier, 2 parts of SBR modifier, 1 part of octadecyl alcohol polyoxyethylene ether, 20 parts of heavy calcium carbonate, and 1.5 parts of rosin resin.

[0058] Figure 3 This is a scanning electron microscope image of a PET film coated with an acrylic frosted coating in an embodiment of the present invention.

[0059] from Figure 3 As can be seen, the PET film coated with a frosted coating exhibits a rough and irregular morphology, with numerous fine protrusions and depressions, forming a three-dimensional rough surface. This structure provides more physical bonding points for the self-adhesive asphalt layer. At high temperatures, the asphalt can flow into the depressions to form interlocking, enhancing the adhesion between the film and the asphalt layer.

[0060] Example 3

[0061] The method for preparing the self-adhesive modified bitumen waterproof membrane in Example 3 is the same as in Example 1, except that the functional layer has a strength of 90 g / m². 2The polypropylene-polyethylene nonwoven fabric has an interface layer of 0.75mm thick PET film coated with an acrylic frosted coating; the self-adhesive modified asphalt compound consists of the following raw materials: 55 parts of 90# asphalt, 4 parts of SBS modifier, 15 parts of aromatic oil slow-release rubber modifier, 6 parts of SIS modifier, 4 parts of dodecyl alcohol polyoxyethylene ether, 10 parts of heavy calcium carbonate, and 3 parts of C9 petroleum resin.

[0062] Example 4

[0063] The method for preparing the self-adhesive modified bitumen waterproof membrane in Example 4 is the same as in Example 1, except that the functional layer has a strength of 90 g / m². 2 The polyester nonwoven fabric and the mechanically surface-modified PET film with an interface layer of 0.5mm thickness are used. The raw materials of the self-adhesive modified asphalt compound include: 50 parts of 70# asphalt, 8 parts of SBS modifier, 9 parts of aromatic oil slow-release rubber modifier, 1 part of SBR modifier, 2 parts of pentadecyl alcohol polyoxyethylene ether, 10 parts of heavy calcium carbonate, and 2 parts of rosin resin.

[0064] Comparative Example 1

[0065] The method for preparing the self-adhesive modified bitumen waterproof membrane in Comparative Example 1 is the same as that in Example 1, except that the functional layer has a strength of 60 g / m². 2 The polyester nonwoven fabric has an interface layer of 0.1mm thick unmodified PET film; the self-adhesive modified asphalt compound consists of the following raw materials: 45 parts of 90# asphalt, 5 parts of SBS modifier, 10 parts of rubber powder, 4 parts of SIS modifier, 3 parts of tetradecyl alcohol polyoxyethylene ether, 10 parts of heavy calcium carbonate, and 1 part of C5 petroleum resin.

[0066] Comparative Example 2

[0067] The method for preparing the self-adhesive modified bitumen waterproof membrane in Comparative Example 1 is the same as that in Example 1, except that the functional layer has a strength of 80 g / m². 2 The self-adhesive modified asphalt compound consists of: 60 parts of 70# asphalt, 8 parts of SBS modifier, 10 parts of rubber powder, 2 parts of SBR modifier, 1 part of octadecyl alcohol polyoxyethylene ether, 20 parts of heavy calcium carbonate, and 1.5 parts of rosin resin.

[0068] Furthermore, the bonding performance of the self-adhesive modified bitumen waterproof membranes prepared in Examples 1-4 and Comparative Examples 1-2 was tested. Test methods: Low-temperature flexibility and peel strength between the membrane and aluminum sheet were tested according to GB23441-2009 "Self-adhesive Polymer Modified Bitumen Waterproof Membranes". Heat aging method: The heat aging test method was performed according to GB23441-2009 "Self-adhesive Polymer Modified Bitumen Waterproof Membranes", with a heat aging period of 60 days. The test results are shown in Table 1.

[0069] Table 1. Test results of the bonding performance of self-adhesive modified bitumen waterproof membrane.

[0070]

[0071] As shown in Table 1, the peel strength of the roll material to the aluminum plate in Examples 1-4 at 0℃ and 25℃ (4.9-5.2 N / mm, 2.6-2.9 N / mm) is significantly higher than that in Comparative Examples 1-2 (0.5-0.8 N / mm, 2.0-2.2 N / mm). Moreover, the failure mode of the Examples is mostly "cohesive failure of the bitumen layer", while that of the Comparative Examples is mostly "peeling of the bitumen layer from the membrane". The low-temperature flexibility decay of the Examples (2-3℃) is much smaller than that of the Comparative Examples (15-16℃). After heat aging, the peel strength of the Examples (1.9-2.3 N / mm) is still higher than that of the Comparative Examples (0.5 N / mm), and the failure mode is still "cohesive failure of the bitumen layer", while that of the Comparative Examples is "peeling of the bitumen layer from the membrane". This indicates that the self-adhesive modified bitumen waterproof roll material prepared in the Examples has better bonding performance, low-temperature flexibility retention ability and performance stability after heat aging than the Comparative Examples. The bonding system is more stable and the resistance to temperature change and anti-aging performance is better.

[0072] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-adhesive modified asphalt compound, characterized in that, The components include the following parts by weight: 45-60 parts of base asphalt, 4-8 parts of SBS modifier, 8-15 parts of aromatic oil slow-release rubber modifier, 1-8 parts of rubber modifier, 0.2-4 parts of alcohol ether additive, 10-20 parts of filler, and 1-3 parts of tackifying resin; The rubber modifier includes at least one of SIS and SBR.

2. The self-adhesive modified asphalt compound according to claim 1, characterized in that, The aromatic oil slow-release rubber modifier is prepared by the following method: Rubber powder is added to preheated aromatic oil and subjected to a development process under stirring conditions to allow the rubber powder to absorb the aromatic oil, thus obtaining oil-absorbing rubber powder. The oil-absorbing rubber powder is subjected to surface degreasing treatment, and after washing, drying, coating and drying again, an aromatic oil slow-release rubber modifier is obtained. The coating process includes first applying a solution containing a silane coupling agent, drying it, and then applying a coating solution layer by layer to form a porous coating film on the surface of the oil-absorbing rubber powder.

3. The self-adhesive modified asphalt compound according to claim 2, characterized in that, The coating solution is an aqueous solution of nano-silica; The silane coupling agent includes any one of aminosilane, epoxysilane, and vinylsilane; The particle size of the rubber powder is 50-80 mesh; The preheating temperature is 140-160℃; The drying temperature is 80-110℃.

4. The self-adhesive modified asphalt compound according to claim 1, characterized in that, The base asphalt is at least one of 70# asphalt and 90# asphalt; The SBS is star-shaped SBS, and the styrene content in the SBS is 30 wt%. The alcohol ether additives include C12-C18 fatty alcohol polyoxyethylene ethers; The filler is at least one of heavy calcium carbonate, light calcium carbonate, talc, and stone powder; The tackifying resin includes at least one of petroleum resin and rosin resin.

5. A method for preparing a self-adhesive modified asphalt compound as described in any one of claims 1-4, characterized in that, include: SBS modifier, rubber modifier, tackifying resin, alcohol ether additive, filler, and aromatic oil slow-release rubber modifier were added sequentially to the heated base asphalt and stirred and dispersed to obtain self-adhesive modified asphalt compound.

6. A self-adhesive modified bitumen waterproof membrane, characterized in that, From top to bottom, they include: Functional composite membrane layer, asphalt layer, and isolation membrane layer; The asphalt layer is formed by coating with the self-adhesive modified asphalt adhesive as described in any one of claims 1-4; The functional composite film is composed of a functional layer, a barrier layer and an interface layer bonded together from top to bottom; The interface layer is a surface-modified polyethylene terephthalate film, the barrier layer is a metal foil, and the functional layer is a non-woven fabric.

7. The self-adhesive modified bitumen waterproof membrane according to claim 6, characterized in that, The surface-modified polyethylene terephthalate film is selected from any one of polyethylene terephthalate film coated with a frosted coating and polyethylene terephthalate film with mechanical surface modification. The metal foil is selected from any one of aluminum foil, copper foil, and stainless steel foil; The nonwoven fabric is selected from any one of the following materials: polyester, polypropylene, and polypropylene-polyethylene. The isolation membrane layer is selected from any one of polyethylene film, polypropylene film, polyethylene terephthalate film, polyamide-polypropylene co-extruded film, and polyamide-polyethylene co-extruded film; and / or The thickness of the interface layer is 50-150 μm; and / or The thickness of the barrier layer is 7-12 μm; and / or The nonwoven fabric has a basis weight of 20-90 g / m². 2 ; and / or The thickness of the asphalt layer is 0.5-2.5 mm.

8. The self-adhesive modified bitumen waterproof membrane according to claim 7, characterized in that, The self-adhesive modified bitumen waterproof membrane also includes: An edge reinforcement layer is embedded inside the asphalt layer and symmetrically distributed on both sides of the middle part of the asphalt layer. It extends along the edge of the self-adhesive modified bitumen waterproof membrane and is used to enhance the structural strength and damage resistance of the edge of the self-adhesive modified bitumen waterproof membrane. The edge reinforcement layer is selected from either glass fiber mesh or polyethylene terephthalate film. The thickness of the edge reinforcement layer is 0.1-0.4 mm.

9. A method for preparing a self-adhesive modified bitumen waterproof membrane as described in any one of claims 6-8, characterized in that, include: After coating the self-adhesive bitumen adhesive as described in any one of claims 1-4 onto the interface layer of the functional composite membrane, a release film is covered to obtain a self-adhesive modified bitumen waterproof membrane.

10. An application of a self-adhesive modified bitumen waterproof membrane as described in any one of claims 6-8, characterized in that, The applications include: The self-adhesive modified bitumen waterproof membrane as described in any one of claims 6-8 is laid on the substrate surface, and a waterproof coating is applied to the surface of the functional layer of the functional composite membrane layer. The waterproof coating is selected from any one of acrylic coatings, polyurethane coatings, polyurea coatings, silane coatings, and polyaspartic acid ester coatings.

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