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

Abstract

The invention provides self-adhesive modified asphalt, a self-adhesive modified asphalt waterproof coiled material and a preparation method of the self-adhesive modified asphalt waterproof coiled material, and belongs to the technical field of asphalt and waterproof coiled materials. The self-adhesive modified asphalt is prepared from the following components in percentage by weight: 3 to 30 weight percent of matrix asphalt, 20 to 30 weight percent of aromatic hydrocarbon oil, 3 to 5 weight percent of thermoplastic elastomer, 5 to 8 weight percent of rubber modifier, 5 to 10 weight percent of tackifying resin, 3 to 8 weight percent of dioctyl sodium sulfosuccinate, 1 to 3 weight percent of polyaluminum ferric chloride, 1 to 3 weight percent of ferroferric oxide and 0.5 to 1 weight percent of limestone powder, and 10 to 30 wt% of an inorganic filler.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of asphalt and waterproofing membrane, and particularly relates to a self-adhesive modified asphalt, a self-adhesive modified asphalt waterproofing membrane and a preparation method thereof. BACKGROUND

[0002] At present, the thermal insulation board includes polystyrene (EPS / XPS / SEPS), polyurethane, inorganic (rock wool / vitrified microbead), etc. The adhesion effect of the self-adhesive modified asphalt and the thermal insulation board is poor, and the main reasons include that the surface energy of the polystyrene and polyurethane thermal insulation board is low (28-40 mN / m) and is mostly non-polar material, while the surface energy of the modified asphalt is 25-30 mN / m, according to the viscosity theory, the modified asphalt is not easy to wet the interface of the thermal insulation board. In addition, the plane of the thermal insulation board is irregular, the holes and the floating dust and water vapor in the air in the construction process are all factors affecting the adhesion of the modified asphalt and the thermal insulation board, and the cold adhesion method is often used, which cannot heat the base layer, so that the modified asphalt is difficult to adhere firmly to the thermal insulation board. As for the inorganic thermal insulation board (rock wool / vitrified microbead), the surface energy is as high as (40-55 mN / m), but the material is rough and easy to absorb water, which increases the difficulty of adhesion of the modified asphalt and the inorganic thermal insulation board, and finally makes them difficult to adhere. SUMMARY

[0003] In view of the above technical problems, the present disclosure provides a self-adhesive modified asphalt, a self-adhesive modified asphalt waterproofing membrane and a preparation method thereof, so as to at least partially solve the above technical problems. In this regard, the scheme provided by the present disclosure is as follows.

[0004] As a first aspect of the present disclosure, a self-adhesive modified asphalt is provided, which comprises, in terms of weight percentage: 3-30 wt% base asphalt, 20-30 wt% aromatic oil, 3-5 wt% thermoplastic elastomer, 5-8 wt% rubber modifier, 5-10 wt% tackifying resin, 3-8 wt‰ sodium diisooctyl sulfosuccinate, 1-3 wt‰ polyaluminum ferric chloride, 1-3 wt‰ ferroferric oxide, 0.5-1 wt% limestone powder, and 10-30 wt% inorganic filler.

[0005] As a second aspect of the present disclosure, a preparation method of the self-adhesive modified asphalt is provided, which comprises: uniformly mixing the base asphalt, the aromatic oil, the thermoplastic elastomer, the rubber modifier, the tackifying resin and the inorganic filler to obtain a self-adhesive modified asphalt intermediate; uniformly mixing the polyaluminum ferric chloride, the sodium diisooctyl sulfosuccinate and the ferroferric oxide in the limestone powder to obtain limestone particles; and uniformly dispersing the limestone particles into the self-adhesive modified asphalt intermediate by a screw machine to obtain the self-adhesive modified asphalt.

[0006] As a third aspect of the present disclosure, a preparation method of a self-adhesive modified asphalt waterproof roll material is provided, comprising: providing a waterproof base material, which comprises from top to bottom: a surface isolation layer, a first modified asphalt layer, a reinforcing base layer, a second modified asphalt layer, and an isolation layer; applying the self-adhesive modified asphalt to the lower surface of the isolation layer to obtain a nascent waterproof roll material; placing the nascent waterproof roll material in an electric field of a double electrode plate, with the self-adhesive modified asphalt facing the cathode side of the electrode plate, and under the action of the electric field, prompting the ferroferric oxide to carry the polyaluminum ferric chloride and the sodium diisooctyl sulfosuccinate to the surface of the self-adhesive modified asphalt facing the cathode side; after the action of the electric field is completed, heating the self-adhesive modified asphalt using hot air to form a self-adhesive modified asphalt layer; and after cooling and setting, applying a silicon-coated isolation primer film on the self-adhesive modified asphalt layer to obtain a modified asphalt waterproof roll material.

[0007] As a fourth aspect of the present disclosure, a self-adhesive modified asphalt waterproof roll material is provided, which is prepared by the above preparation method.

[0008] Based on the above technical solutions, the self-adhesive modified asphalt, the self-adhesive modified asphalt waterproof roll material, and the preparation method thereof provided by the present disclosure at least have one of the following beneficial effects:

[0009] (1) In the present disclosure, sodium diisooctyl sulfosuccinate is an anionic surfactant, which has a hydrophobic alkyl group and a hydrophilic sulfonic acid group in its molecular structure, showing amphiphilic properties, and can improve the polarity of the modified asphalt. The hydroxyl and chlorine groups in polyaluminum ferric chloride (PAFC) can form strong interfacial adsorption, van der Waals forces, and hydrogen bonds, which can improve the wettability and mechanical roughness between the self-adhesive modified asphalt and the insulation board. Ferroferric oxide as a magnetic carrier can carry sodium diisooctyl sulfosuccinate and polyaluminum ferric chloride to the surface of the self-adhesive modified asphalt, to improve the surface polarity of the self-adhesive modified asphalt, and thus improve the bonding performance of the self-adhesive modified asphalt and the insulation board, making them bond firmly. By adjusting the ratio of aromatic oil and base asphalt, the polarity and cohesive strength of the self-adhesive modified asphalt can be significantly improved, and the bonding strength between the self-adhesive modified asphalt and the insulation board can be improved.

[0010] (2) In the present disclosure, the self-adhesive modified asphalt layer in the self-adhesive modified asphalt waterproof roll material can enhance the bonding ability with the insulation board, and the isolation layer in the self-adhesive modified asphalt waterproof roll material has good barrier vapor and corrosion resistance properties, which can protect the first modified asphalt layer and the second modified asphalt layer in the self-adhesive modified asphalt waterproof roll material from being eroded by the water vapor inside the insulation board, and prolong the service life of the self-adhesive modified asphalt waterproof roll material. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 A flowchart for preparing the self-adhesive modified asphalt in the embodiments of the present disclosure;

[0012] Figure 2 FIG. 1 is a flowchart illustrating a process of preparing a self-adhesive modified asphalt waterproofing membrane according to an embodiment of the present disclosure;

[0013] Figure 3 FIG. 2 is a structural diagram of a modified asphalt waterproofing membrane according to an embodiment of the present disclosure;

[0014] Figure 4 FIG. 3 is a structural diagram of a steam channel type modified asphalt waterproofing membrane according to another embodiment of the present disclosure.

[0015]

REFERENCE NUMERALS

[0016] 1 - surface isolation layer, 2 - first modified asphalt layer, 3 - reinforcing carcass layer, 4 - second modified asphalt layer, 5 - isolation layer, 6 - self-adhesive modified asphalt layer, 601 - self-adhesive modified asphalt strip, 7 - channel, 8 - silicon-coated isolation primer film. DETAILED DESCRIPTION

[0017] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that the description is merely illustrative of the present disclosure and in no way limits the scope of the present disclosure. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it will be apparent to one skilled in the art that the embodiments can be practiced without these specific details. In other instances, well-known structures and techniques have been omitted in order to avoid obscuring the concepts of the present disclosure.

[0018] The terms used herein are merely used to describe specific embodiments and are not intended to limit the present disclosure. The term "include" used herein indicates the presence of a feature, step, operation, but does not exclude the presence or addition of one or more other features.

[0019] To solve the problem of adhesion between the modified asphalt and the insulation board, the related art proposes to improve the polarity of the modified asphalt, such as adding SBR (styrene-butadiene rubber), IIR (butyl rubber) and other additives, or treating the interface, such as increasing the closeness of the insulation board and reducing the roughness of the insulation board. Although improving the polarity of the modified asphalt can improve the initial adhesion of the modified asphalt and enhance the interfacial force between the modified asphalt and the base layer (such as the insulation board or the structural layer), the wetting effect of the modified asphalt on the insulation board is limited, and the modified asphalt cannot be quickly attached to the base layer. Although the interface treatment of the insulation board can increase the contact area between the modified asphalt and the insulation board, it has little effect on the adhesion between the modified asphalt and the insulation board and the formation of force.

[0020] Under the premise that SBS (styrene-butadiene-styrene block copolymer) modified asphalt has provided excellent cohesive strength, the problems of adhesion of self-adhesive modified asphalt to insulation board and wettability of modified asphalt on the insulation board still need to be solved. Under the condition of a certain interface energy of the insulation board, the surface energy of the self-adhesive modified asphalt needs to be reduced to effectively improve the adhesion and wettability. At present, the main way to reduce the surface energy of the modified asphalt is to add surfactants and plasticizers or solvents, but these methods are suitable for fluids or semi-solids with coating or mixed asphalt as the object, and there is no good way for cold-adhesive waterproofing membranes which are solid objects.

[0021] To this end, the present disclosure improves the composition of the modified asphalt layer bonded to the insulation board to improve the polarity of the modified asphalt and improve the adhesion and wettability of the modified asphalt to the insulation board.

[0022] As a first aspect of the present disclosure, a self-adhesive modified asphalt suitable for bonding to an insulation board is provided, which comprises, by weight percentage: 3-30wt% base asphalt, 20-30wt% aromatic oil, 3-5wt% thermoplastic elastomer, 5-8wt% rubber modifier, 5-10wt% tackifying resin, 3-8wt‰ sodium diisooctyl sulfosuccinate, 1-3wt‰ polyaluminum ferric chloride, 1-3wt‰ ferroferric oxide, 0.5-1wt% limestone powder; and 10-30wt% inorganic filler.

[0023] In the embodiments of the present disclosure, sodium diisooctyl sulfosuccinate, as an anionic surfactant, has a hydrophobic alkyl group and a hydrophilic sulfonic acid group in its molecular structure, showing amphiphilic properties, which can improve the polarity of the asphalt and further improve the adhesion and wettability of the self-adhesive modified asphalt. The hydroxyl and chlorine groups in polyaluminum ferric chloride (PAFC) can form strong interfacial adsorption, van der Waals force and hydrogen bonds, which can improve the wettability and mechanical roughness between the self-adhesive modified asphalt and the insulation board. Ferroferric oxide as a magnetic carrier can carry sodium diisooctyl sulfosuccinate and polyaluminum ferric chloride to the surface of the self-adhesive modified asphalt to improve the surface polarity of the self-adhesive modified asphalt and further improve the adhesion performance of the self-adhesive modified asphalt to the insulation board. By adjusting the ratio of aromatic oil and base asphalt, the polarity and cohesive strength of the self-adhesive modified asphalt can be significantly improved, and the adhesion strength of the self-adhesive modified asphalt to the insulation board can be improved.

[0024] Further, the self-adhesive modified asphalt is formed by mixing polyaluminum ferric chloride, sodium diisooctyl sulfosuccinate (surfactant) and ferroferric oxide in limestone powder to form limestone particles, and dispersing them in the self-adhesive modified asphalt intermediate formed by mixing base asphalt, aromatic oil, thermoplastic elastomer, rubber modifier, tackifying resin and inorganic filler.

[0025] According to embodiments of this disclosure, the base asphalt includes a first base asphalt and a second base asphalt; wherein, the first base asphalt is selected from 3-5 wt% of 0#-30# base asphalt, and the asphaltene content in the 0#-30# base asphalt is 60-80 wt%; preferably, 10# base asphalt, and the asphaltene content in the 10# base asphalt is 60-80 wt%; the second base asphalt is selected from 20-30 wt% of 70# base asphalt, and the asphaltene content in the 70# base asphalt is 10-13 wt%, the resin content is 20-30 wt%, the aromatic content is 25-40 wt%, and the saturated content is 20-35 wt%, and 90# asphalt can also be used. As the base material for self-adhesive modified asphalt, the base asphalt mainly provides bonding and waterproofing properties. 0#-30# base asphalt (such as 10# base asphalt) has a higher hardness, while 70# base asphalt is softer. By controlling the ratio of the two, a base asphalt with moderate hardness is obtained.

[0026] According to embodiments of this disclosure, the aromatic oil has an aromatic content ≥95%, a flash point of 214°C, and a rotational viscosity of (40~50) mPa·s at 40°C. The aromatic oil is primarily used to improve the solubility of polymers and enhance the storage stability of self-adhesive modified asphalt.

[0027] According to embodiments of this disclosure, the thermoplastic elastomer is selected from any one of styrene-butadiene-styrene block copolymer (SBS), thermoplastic polyolefin elastomer (TPO), thermoplastic dynamic vulcanizate (TPV), and thermoplastic polyurethane (TPU), with a molecular weight of 130,000 to 180,000; the aforementioned thermoplastic elastomers, as modifiers, can improve the temperature stability, aging resistance, and corrosion resistance of self-adhesive modified asphalt.

[0028] According to embodiments of this disclosure, the rubber modifier is selected from at least one of butyl rubber and styrene-butadiene rubber. Utilizing the synergistic effect of butyl rubber (IIR) and styrene-butadiene rubber (SBR), the interfacial polarity and cohesive strength of the self-adhesive modified asphalt can be improved, enabling the modified asphalt to quickly bond with the insulation board and achieve anchoring strength.

[0029] According to embodiments of this disclosure, the tackifying resin is selected from at least one of C5 petroleum resin and C9 petroleum resin. These tackifying resins serve as tackifying materials for self-adhesive modified asphalt, and can be dispersed in the asphalt phase, significantly increasing the polarity and fluidity of the material. Specifically, the softening point of C5 petroleum resin is 90-110°C; the softening point of C9 petroleum resin is 120-130°C. C5 petroleum resin is preferably used as the tackifying resin because it has high tack properties, high peel strength, and is suitable for rapid bonding applications, and also exhibits good compatibility with thermoplastic elastomers.

[0030] According to embodiments of this disclosure, the inorganic filler is a mixture of silicates and carbonates with a fineness of 200-400 mesh. The inorganic filler is mainly used to enhance the tensile strength and abrasion resistance of self-adhesive modified asphalt, adjust its viscosity, improve its workability, and extend its service life.

[0031] According to embodiments of this disclosure, sodium diisooctyl sulfosuccinate (ZJ1702 wetting and dispersing agent OT-75) can also be used as a wetting and dispersing agent to improve the wetting properties of self-adhesive modified asphalt.

[0032] Figure 1 This is a schematic diagram of the process for preparing self-adhesive modified bitumen in the embodiments of this disclosure.

[0033] As a second aspect of this disclosure, such as Figure 1 As shown, the preparation method of self-adhesive modified asphalt includes: steps S1-S3.

[0034] In step S1, the base asphalt, aromatic oil, thermoplastic elastomer, rubber modifier, tackifying resin and inorganic filler are mixed evenly to obtain a self-adhesive modified asphalt intermediate.

[0035] In step S2, polyaluminum ferric chloride, sodium diisooctyl sulfosuccinate, and iron(III) oxide are uniformly mixed in limestone powder to obtain limestone particles.

[0036] In step S3, limestone particles are uniformly dispersed into the self-adhesive modified asphalt intermediate by a screw press to obtain self-adhesive modified asphalt.

[0037] In embodiments of this disclosure, a self-adhesive modified asphalt intermediate is prepared by mixing base asphalt, aromatic oil, thermoplastic elastomer, rubber modifier, tackifying resin, and inorganic filler, followed by mechanical stirring and colloid grinding. Simultaneously, polyaluminum ferric chloride, sodium diisooctyl sulfosuccinate, and ferric oxide are uniformly mixed in limestone powder. The limestone powder's encapsulating properties adsorb the aforementioned substances, forming limestone particles. One hour before the required coating with modified asphalt, the limestone particles are added to the self-adhesive modified asphalt intermediate using a screw compressor's dispersion disc and stirred at high speed (1000-2000 rpm) to ensure uniform dispersion, thereby obtaining the self-adhesive modified asphalt compound. The method for preparing self-adhesive modified asphalt in this disclosure is relatively simple and highly reproducible.

[0038] According to an embodiment of this disclosure, the temperature inside the screw compressor in step S3 is 150-170°C.

[0039] Figure 2 This is a schematic diagram of the process for preparing self-adhesive modified bitumen waterproof membrane in the embodiments of this disclosure.

[0040] As a third aspect of this disclosure, such asFigure 2 As shown, the preparation method of self-adhesive modified bitumen waterproof membrane includes: steps S21-S25.

[0041] In step S21, a waterproof substrate is provided, which includes, from top to bottom: a surface isolation layer, a first modified bitumen layer, a reinforced base layer, a second modified bitumen layer, and an isolation layer.

[0042] In step S22, self-adhesive modified bitumen is coated onto the lower surface of the isolation layer to obtain the nascent waterproof membrane.

[0043] In step S23, the nascent waterproof membrane is placed in the electric field of the dual-electrode plate, with the self-adhesive modified bitumen surface facing the cathode side of the electrode plate. Under the action of the applied electric field, ferric oxide, carrying polyaluminum ferric chloride and sodium diisooctyl sulfosuccinate, is induced to migrate to the self-adhesive modified bitumen surface facing the cathode side.

[0044] In step S24, after the electric field is applied, hot air is used to heat the self-adhesive modified asphalt to form a self-adhesive modified asphalt layer.

[0045] In step S25, after cooling and setting, a silicone-coated release film is applied to the self-adhesive modified bitumen layer to obtain a self-adhesive modified bitumen waterproof membrane.

[0046] In the embodiments of this disclosure, the self-adhesive modified bitumen prepared in the above embodiments is coated onto the isolation layer and an electric field is applied. Under the action of the electric field, the ferric oxide in the self-adhesive modified bitumen layer carries the dispersant and polyaluminum ferric chloride to migrate to the surface of the self-adhesive modified bitumen, which is beneficial for the surfactant (wetting dispersant) to wet the surface of the roll material and reduce the surface energy of the roll material, thereby improving the adhesion and wettability of the self-adhesive modified bitumen waterproof roll material and the insulation board.

[0047] According to embodiments of this disclosure, in step S21, the surface isolation layer mainly serves an isolation function to prevent the waterproof membrane from sticking together during winding and transportation, and to prevent damage to the modified bitumen layer. The surface isolation layer can be formed from any one of the following materials: fine sand, low-density polyethylene (LDPE) film, or silicone-coated isolation base film, wherein the thickness of the LDPE film can be 10-30 μm.

[0048] The first and second modified asphalt layers are primarily used for waterproofing. The composition and / or thickness of the first and second modified asphalt layers may be the same or different, with a thickness ranging from 1.0 mm to 2.5 mm. They are high-temperature resistant modified asphalts with a heat resistance ≥90℃ and a cohesive strength ≥1.5 N / mm. For example, if the thickness of the first modified asphalt layer is 1.5 mm and the thickness of the second modified asphalt layer is 1.0 mm, increasing the thickness of the first modified asphalt layer can increase the embedding of fine sand, thereby increasing the bonding strength of the fine sand. Furthermore, the first and second modified asphalt layers can be obtained by modifying the asphalt with any of the following modifiers: styrene-butadiene-styrene block copolymer (SBS), thermoplastic polyurethane elastomer rubber (TPU), or thermoplastic vulcanizate rubber (TPV).

[0049] The reinforcing base layer is placed between the first and second modified bitumen layers to reinforce the self-adhesive modified bitumen waterproof membrane and improve its resistance to external damage. The material of the reinforcing base layer can be any one of polyester, fiberglass, or fiberglass-reinforced polyester, and its tensile strength must meet the performance requirements of GB 18242-2008 "Elastomer Modified Bitumen Waterproof Membranes". The weight of the reinforcing base layer material can be 220-300g.

[0050] The isolation layer is a composite aluminum foil film, composed of aluminum foil and a hydrophobic layer stacked together. This isolation layer has excellent vapor barrier and corrosion resistance, effectively preventing water vapor from eroding the waterproof membrane under steam pressure and extending the overall durability of the self-adhesive modified bitumen layer. The hydrophobic layer can be one or two layers, preferably two. When there is only one hydrophobic layer, it contacts the second modified bitumen layer, and the aluminum foil contacts the self-adhesive modified bitumen layer. When there are two hydrophobic layers, the hydrophobic layer is located on the upper and lower surfaces of the aluminum foil, forming a sandwich structure, which also protects the upper modified bitumen layer from water vapor erosion. The hydrophobic layer material can be any one of polyethylene terephthalate (PET) film, high-density polyethylene (HDPE) film, polyamide (PA) film, or biaxially oriented polypropylene (BOPP) film; other hydrophobic films can also be used. The aluminum foil thickness is 7-18 μm, and the hydrophobic layer thickness is 15-40 μm. Furthermore, the hydrophobic layers on the upper and lower surfaces of the aluminum foil may be the same or different, which can be understood as the thickness and / or material of the hydrophobic layers on the upper and lower surfaces being the same or different. For example, composite aluminum foil film is PET film + aluminum foil + PET film. Compared with traditional PET film alone, it can improve the barrier properties of the film and reduce the erosion of the modified bitumen layer by water vapor transmission or other thermal expansion and contraction.

[0051] According to an embodiment of this disclosure, in step S22, the thickness of the self-adhesive modified bitumen coating is 0.6-1.5 mm. Further, the self-adhesive modified bitumen can be coated in a single sheet onto the isolation layer, serving as the adhesive for bonding with the substrate. This thickness is chosen to ensure strong adhesion, ease of construction, and economic feasibility of the membrane adhesive layer thickness. Alternatively, the self-adhesive modified bitumen can be coated in a strip array onto the isolation layer, with multiple spaced-apart strips forming a strip-shaped self-adhesive modified bitumen layer. The spacing between the self-adhesive modified bitumen strips may be the same or different; the self-adhesive modified bitumen strips at both ends of the self-adhesive modified bitumen layer serve as overlapping edges, with a width wider than or the same as the width of the self-adhesive modified bitumen strips between the overlapping edges. By coating the self-adhesive modified bitumen in strips, the formed self-adhesive modified bitumen strips can form channels with the isolation layer for venting steam. These channels can be used to vent water vapor accumulated in the insulation board portion, preventing water vapor from eroding the upper first and second modified bitumen layers, and extending the service life of the self-adhesive modified bitumen waterproof membrane.

[0052] According to an embodiment of this disclosure, in step S23, the applied electric field strength is 30-50V / m, thereby driving the magnetic iron oxide to move towards the surface, carrying the surfactant and polyaluminum ferric chloride.

[0053] According to an embodiment of this disclosure, in step S24, the roll material processed in step S23 is fed into a 1-2 meter hot air heating channel, and the self-adhesive modified asphalt layer is heated a second time with hot air at 100-150°C, which reduces the viscosity of the modified asphalt layer. At the same time, the dispersant and polyaluminum ferric chloride undergo molecular rearrangement, hydrophilic and polar group rearrangement, and the ferric oxide, surfactant and polyaluminum ferric chloride are gathered on the surface of the self-adhesive modified asphalt layer, which improves the wettability and adhesion of the self-adhesive modified asphalt.

[0054] According to an embodiment of this disclosure, in step S25, after cooling and setting, a silicon insulating base film is coated and the film is wound up.

[0055] As a fourth aspect of this disclosure, the modified bitumen waterproof membrane comprises, from top to bottom: a surface isolation layer, a first modified bitumen layer, a reinforcing base layer, a second modified bitumen layer, an isolation layer, a self-adhesive modified bitumen layer prepared as described above, and a silicone-coated isolation base film.

[0056] In the modified bitumen waterproof membrane disclosed herein, the surface isolation layer primarily serves an isolation function, preventing the waterproof membrane from sticking together during winding and transportation, and avoiding damage to the modified bitumen layers. The first and second modified bitumen layers serve as the main waterproof layers. Introducing a reinforcing base layer between the first and second modified bitumen layers enhances the membrane's resistance to external forces. The isolation layer introduced between the second modified bitumen layer and the self-adhesive modified bitumen layer can prevent the pressure of water vapor from the insulation layer or interior structural layer from damaging and corroding the upper modified bitumen layer, reducing the aging rate of the modified bitumen layer and extending the service life of the modified bitumen waterproof membrane. The silicone-coated isolation base film is mainly used to protect the waterproof membrane and can be removed during construction.

[0057] Figure 3 This is a schematic diagram of the structure of the modified bitumen waterproof membrane in the embodiments of this disclosure.

[0058] like Figure 3 As shown, the modified bitumen waterproof membrane comprises, from top to bottom: a surface isolation layer 1, a first modified bitumen layer 2, a reinforcing base layer 3, a second modified bitumen layer 4, an isolation layer 5, a self-adhesive modified bitumen layer 6 prepared as described above, and a silicone-coated isolation base film 8; wherein, the self-adhesive modified bitumen layer is formed by coating multiple self-adhesive modified bitumen strips in a strip array on the isolation layer, wherein the self-adhesive modified bitumen strips at both ends serve as overlapping edges and are directly bonded to the second modified bitumen layer 4, and the multiple self-adhesive modified bitumen strips in the middle form a continuous whole with the same width as the isolation layer 5.

[0059] According to embodiments of this disclosure, such as Figure 3 As shown, the width of the isolation layer 5 is smaller than the width of the self-adhesive modified bitumen layer 6. This allows the isolation layer 5 and the second modified bitumen layer 4 to be directly connected through the overlapping edges at both ends of the self-adhesive modified bitumen layer 6, thereby improving the sealing performance of the modified bitumen waterproof membrane. At the same time, two waterproof membranes can be overlapped, with an overlap width of 8-12cm.

[0060] According to embodiments of this disclosure, the isolation layer 5 in the above embodiments is a composite aluminum foil film, which is formed by stacking a hydrophobic layer and an aluminum foil. This composite aluminum foil film has good vapor barrier and corrosion resistance functions, and can effectively block water vapor from eroding the waterproof membrane under steam pressure, extending the overall durability of the modified bitumen layer. The hydrophobic layer can be a single layer or two layers, preferably two layers. When the hydrophobic layer is a single layer, it is in contact with the second modified bitumen layer 4, and the aluminum foil is in contact with the self-adhesive modified bitumen layer 6. When the hydrophobic layer is a double layer, it is located on the upper and lower surfaces of the aluminum foil, and can also protect the upper modified bitumen layer from water vapor erosion. The material of the hydrophobic layer can be any one of polyethylene terephthalate (PET) film, high-density polyethylene (HDPE) film, polyamide (PA) film, or biaxially oriented polypropylene (BOPP) film; other hydrophobic films can also be used. The thickness of the aluminum foil is 7-18 μm, and the thickness of the hydrophobic layer is 15-40 μm. Furthermore, the hydrophobic layers on the upper and lower surfaces of the aluminum foil may be the same or different, which can be understood as the thickness and / or material of the hydrophobic layers on the upper and lower surfaces being the same or different. For example, composite aluminum foil film is PET film + aluminum foil + PET film. Compared with traditional PET film alone, it can improve the barrier properties and corrosion resistance of the film, and reduce the erosion of the self-adhesive modified bitumen layer by water vapor transmission or other thermal expansion and contraction.

[0061] According to embodiments of this disclosure, during construction, the silicone-coated base membrane 8 is removed, and the self-adhesive modified bitumen layer 6 is directly bonded to the insulation board. The self-adhesive modified bitumen layer 6 in the modified bitumen waterproof membrane enhances the adhesion to the insulation board, ensuring a firm bond and changing the traditional roofing method. The insulation board is selected from polystyrene insulation boards. Furthermore, the material of the silicone-coated base membrane 8 is selected from, for example, any one of PET film, polyethylene (PE) film, and polypropylene (PP) film.

[0062] According to embodiments of this disclosure, continuing as follows Figure 3 As shown, the widths of the surface isolation layer 1, the first modified asphalt layer 2, the reinforced base layer 3, the second modified asphalt layer 4, and the self-adhesive modified asphalt layer 6 are the same; the width of the silicone-coated isolation base film 8 is 30mm-50mm wider than the width of the self-adhesive modified asphalt layer 6, so that it can be easily removed during construction.

[0063] As Figure 3 An alternative to the self-adhesive modified asphalt layer 6 is that the self-adhesive modified asphalt layer 6 is composed of multiple self-adhesive modified asphalt strips 601 arranged in an array with a spacing of 3-10 cm between each other. The self-adhesive modified asphalt strips 601 at both ends serve as overlapping edges and are directly bonded to the second modified asphalt layer 4. Any two adjacent self-adhesive modified asphalt strips 601 in the middle form a channel 7 for water vapor discharge with the isolation layer 5. The width of the isolation layer 5 is smaller than the width of the self-adhesive modified asphalt layer 6 and is located between the overlapping edges at both ends. The specific structure is as follows: Figure 4 As shown.

[0064] Figure 4 This is a schematic diagram of the structure of a steam-channel type modified bitumen waterproof membrane according to another embodiment of this disclosure.

[0065] like Figure 4 As shown, the steam channel type modified bitumen waterproof membrane includes, from top to bottom: a surface isolation layer 1, a first modified bitumen layer 2, a reinforcing base layer 3, a second modified bitumen layer 4, an isolation layer 5, a strip-shaped self-adhesive modified bitumen layer 6, and a silicone-coated isolation base film 8; wherein, the strip-shaped self-adhesive modified bitumen layer 6 is composed of multiple self-adhesive modified bitumen strips 601 spaced 3-10cm apart, the self-adhesive modified bitumen strips 601 at both ends serve as overlapping edges, and any two adjacent self-adhesive modified bitumen strips 601 in the middle form a channel 7 for venting steam with the isolation layer 5. Furthermore, the self-adhesive modified bitumen strips 601 at both ends of the self-adhesive modified bitumen layer 6 serve as overlapping edges and are directly bonded to the second modified bitumen layer 4. The width of the overlapping edges is 8-12 cm, the width of the self-adhesive modified bitumen strips 601 between the overlapping edges is 2-8 cm, and the width of the channel 7 is 3-10 cm. This allows the obtained modified bitumen waterproof membrane to expel water vapor while also improving its waterproof sealing performance. The isolation layer 5 is composed of aluminum foil and a hydrophobic layer, wherein the hydrophobic layer can be a single layer or two layers, preferably two layers. When the hydrophobic layer is a single layer, it contacts the second modified bitumen layer 4, and the aluminum foil contacts the strip-shaped self-adhesive modified bitumen layer 6. When the hydrophobic layer is a double layer, it is located on the upper and lower surfaces of the aluminum foil, also protecting the upper first modified bitumen layer 2 and the second modified bitumen layer 4 from water vapor erosion. The hydrophobic layer material can be selected from any one of polyethylene terephthalate (PET) film, high-density polyethylene (HDPE) film, polyamide (PA) film, and biaxially oriented polypropylene (BOPP) film; other hydrophobic films can also be used. The aluminum foil thickness is 7-18 μm, and the number of pinholes meets the high-precision requirements in GB / T3198-2010 "Aluminum and Aluminum Alloy Foils". The hydrophobic layer thickness is 15-40 μm. Furthermore, the hydrophobic layers on the upper and lower surfaces of the aluminum foil may be the same or different, which can be understood as the thickness and / or materials of the hydrophobic layers on the upper and lower surfaces being the same or different. For example, a composite aluminum foil film consisting of PET film + aluminum foil + PET film, compared to the traditional PET film alone, can improve the barrier properties and corrosion resistance of the film, and reduce the erosion of the self-adhesive modified bitumen layer by water vapor transmission or other thermal expansion and contraction.

[0066] The following detailed description of the self-adhesive modified bitumen, modified bitumen waterproof membrane and its preparation method, with reference to specific embodiments, is provided below.

[0067] Example 1

[0068] By weight percentage, the self-adhesive modified bitumen comprises: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer (SBS 792E), 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 5wt‰ of ZJ1702 wetting and dispersing agent OT-75, 3wt‰ of polyaluminum ferric chloride, 3wt‰ of iron tetroxide, 2.9wt% of limestone powder, and 23wt% of inorganic filler.

[0069] The preparation process of self-adhesive modified asphalt includes the following steps:

[0070] 1) According to the above formula, the base asphalt, aromatic oil, thermoplastic elastomer, butyl rubber, styrene-butadiene rubber, C5 petroleum resin and inorganic filler are mixed, mechanically stirred and colloidally ground to make a self-adhesive modified asphalt intermediate.

[0071] 2) Polyaluminum ferric chloride, ZJ1702 wetting and dispersing agent OT-75, and iron oxide are uniformly mixed in limestone powder. The aforementioned substances are adsorbed into the limestone powder by the encapsulation property of limestone to obtain limestone particles.

[0072] 3) One hour before the modified asphalt is coated, limestone particles are added to the self-adhesive modified asphalt intermediate through a screw dispersing disc and rapidly dispersed at a high speed of 2000 rpm to prepare the target self-adhesive modified asphalt compound at a temperature of 170℃.

[0073] Preparation such as Figure 4 The vapor channel type modified bitumen waterproof membrane with the structure shown includes the following steps:

[0074] 1) A waterproof substrate is provided, comprising, from top to bottom: a surface isolation layer (such as an LDPE film), an SBS first modified bitumen layer, a reinforcing base layer (such as a fiberglass base), an SBS second modified bitumen layer, and an isolation layer (PET film + Al foil + PET film); subsequently, the self-adhesive modified bitumen mixed in Example 1 is coated in a strip array on the isolation layer, and multiple self-adhesive modified bitumen strips spaced apart from each other form a strip-shaped self-adhesive modified bitumen layer, wherein any two adjacent self-adhesive modified bitumen strips and the isolation layer form a channel for venting vapor, and the self-adhesive modified bitumen strips at both ends of the self-adhesive modified bitumen layer are directly bonded to the SBS second modified bitumen layer as overlapping edges, the width of the overlapping edges is 10cm, the width of the self-adhesive modified bitumen strips is 5cm, the spacing between the self-adhesive modified bitumen strips (i.e., the width of the channel) is 4cm, and the thickness of the self-adhesive modified bitumen layer is 1.0mm; the isolation layer is located in the middle of the overlapping edges and the width of the isolation layer is less than the width of the self-adhesive modified bitumen layer, thereby obtaining a nascent waterproof membrane.

[0075] 2) After coating, place the nascent waterproof membrane in an electric field with an electric field strength of 30V / m, with the self-adhesive modified bitumen surface facing the cathode side of the electrode plate. Under the action of the applied electric field, the iron oxide carries polyaluminum chloride and sodium diisooctyl sulfosuccinate to migrate to the self-adhesive modified bitumen surface facing the cathode side.

[0076] 3. After the electric field is applied, the roll material enters a 1.5-meter hot air heating channel, where 120°C hot air is used to reheat the self-adhesive modified asphalt.

[0077] 4) After cooling and setting, apply a silicone-coated isolation base film to the self-adhesive modified bitumen layer, roll up, and measure to complete the preparation of the roll material, thus obtaining the steam channel type modified bitumen waterproof roll material.

[0078] The modified bitumen waterproof membrane was stored in a warehouse at 20~35℃ for 7 days to allow stress release and curing of the modified bitumen. The softening point, low-temperature flexibility, peel strength (cohesive strength) between modified bitumen, peel strength between modified bitumen and aluminum plate, and bonding strength between modified bitumen and XPS insulation board (commercially available, in accordance with GB / T 30595-2024 "Extruded Polystyrene Board (XPS) System Materials for Building Insulation") of the modified bitumen waterproof membrane were tested according to GB 23441-2009 "Self-adhesive Polymer Modified Bitumen Waterproof Membrane".

[0079] Example 2

[0080] Example 2 uses the same method as Example 1 to prepare self-adhesive modified bitumen and self-adhesive modified waterproof membrane. The difference from Example 1 is that the composition of the self-adhesive modified bitumen in Example 2 includes: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer (SBS 792E), 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 8wt‰ of ZJ1702 wetting and dispersing agent OT-75, 3wt‰ of polyaluminum ferric chloride, 3wt‰ of iron tetroxide, 2.6wt% of limestone powder, and 23wt% of inorganic filler.

[0081] Example 3

[0082] Example 3 uses the same method as Example 1 to prepare self-adhesive modified bitumen and self-adhesive modified waterproof membrane. The difference from Example 1 is that the composition of the self-adhesive modified bitumen in Example 3 includes: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer (SBS 792E), 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 5wt‰ of ZJ1702 wetting and dispersing agent OT-75, 1wt‰ of polyaluminum ferric chloride, 3wt‰ of iron oxide, 3.1wt% of limestone powder, and 23wt% of inorganic filler.

[0083] Example 4

[0084] Example 4 uses the same method as Example 1 to prepare self-adhesive modified bitumen and self-adhesive modified waterproof membrane. The difference from Example 1 is that the composition of the self-adhesive modified bitumen in Example 4 includes: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer (SBS 792E), 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 5wt‰ of ZJ1702 wetting and dispersing agent OT-75, 3wt‰ of polyaluminum ferric chloride, 1wt‰ of iron oxide, 3.1wt% of limestone powder, and 23wt% of inorganic filler.

[0085] Comparative Example 1

[0086] Comparative Example 1 uses the same method as Example 1 to prepare self-adhesive modified bitumen and self-adhesive modified waterproof membrane. The difference from Example 1 is that the composition of the self-adhesive modified bitumen in Comparative Example 1 includes: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer, 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 0wt‰ of ZJ1702 wetting and dispersing agent OT-75, 0wt‰ of polyaluminum ferric chloride, 0wt‰ of iron tetroxide, 4.0wt% of limestone powder, and 23wt% of inorganic filler.

[0087] Comparative Example 2

[0088] Comparative Example 2 prepared self-adhesive modified bitumen and self-adhesive modified waterproof membrane using the same method as Example 1. The difference from Example 1 is that the composition of the self-adhesive modified bitumen in Comparative Example 2 includes: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer, 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 5wt% of ZJ1702 wetting and dispersing agent OT-75, 0wt% of polyaluminum ferric chloride, 0wt% of iron tetroxide, 3.5wt% of limestone powder, and 23wt% of inorganic filler.

[0089] Comparative Example 3

[0090] Comparative Example 3 prepared self-adhesive modified bitumen and self-adhesive modified waterproof membrane using the same method as Example 1. The difference from Example 1 is that the composition of the self-adhesive modified bitumen in Comparative Example 3 includes: 3wt% of 10# base bitumen, 25wt% of 70# base bitumen, 30wt% of aromatic oil, 4wt% of thermoplastic elastomer (SBS 792E), 3wt% of butyl rubber, 4wt% of styrene-butadiene rubber, 4wt% of C5 petroleum resin, 5wt‰ of ZJ1702 wetting and dispersing agent OT-75, 3wt‰ of polyaluminum ferric chloride, 0wt‰ of iron tetroxide, 3.2wt% of limestone powder, and 23wt% of inorganic filler.

[0091] Comparative Example 4

[0092] Comparative Example 4 uses self-adhesive modified bitumen with the same composition as Example 1 and prepares self-adhesive modified waterproof membrane. The difference from Example 1 is that in Comparative Example 4, the electric field strength in the preparation of self-adhesive modified bitumen waterproof membrane is 0V / m.

[0093] Comparative Example 5

[0094] Comparative Example 5 uses the same self-adhesive modified bitumen composition as Example 1 and prepares a self-adhesive modified waterproof membrane. The difference from Example 1 is that in Comparative Example 5, the electric field strength in the preparation of the self-adhesive modified bitumen waterproof membrane is 50V / m.

[0095] Comparative Example 6

[0096] Comparative Example 6 uses self-adhesive modified bitumen with the same composition as Example 1 and prepares self-adhesive modified waterproof membrane. The difference from Example 1 is that in the preparation of self-adhesive modified bitumen waterproof membrane in Comparative Example 6, after the electric field is applied, no secondary heating is performed, and cooling and subsequent processing are carried out directly.

[0097] The performance of the self-adhesive modified bitumen waterproof membranes prepared in Examples 1-4 and Comparative Examples 1-6 was tested, and the specific test results are shown in Table 1.

[0098] Table 1

[0099]

[0100] As shown in Table 1, a comparison between Example 1 and Example 2 revealed that increasing the amount of surfactant (i.e., dispersant, sodium diisooctyl sulfosuccinate) actually reduced the cohesive strength of the self-adhesive modified asphalt. This may be due to the enrichment of active groups provided by excessive surfactants at the interface, which hinders the adhesion of the polar groups of styrene-butadiene rubber and butyl rubber to the substrate.

[0101] A comparison between Example 1 and Example 3 revealed that reducing the amount of aluminum ferric chloride added reduced the cohesive strength and bonding strength of the modified asphalt, especially the bonding strength with the insulation board, indicating that the hydroxyl groups provided by aluminum ferric chloride had a significant effect on interfacial adsorption.

[0102] A comparison of Examples 1 and 4 revealed that reducing the dosage of ferric oxide reduced the bonding strength between the modified asphalt and the aluminum plate and XPS insulation board, indicating that ferric oxide significantly affects the migration of polyaluminum ferric chloride on the surface.

[0103] By comparing Example 1 and Comparative Example 1, it was found that, without the addition of surfactant, polyaluminum ferric chloride, and iron oxide, the self-adhesive modified asphalt had good cohesive strength and peel strength from the aluminum plate, but the bonding strength with the XPS insulation board decreased significantly. This indicates that the above three modifiers have a significant effect on the interfacial wetting of the modified asphalt on the insulation board.

[0104] Through Example 1, Comparative Example 1 and Comparative Example 2, it was found that when only surfactant was added, the cohesive strength and peel strength from the aluminum plate of the self-adhesive modified asphalt did not change much. The wetting effect of the modified asphalt was improved to a certain extent, but the effect was limited, resulting in a slight increase in the peel strength between the self-adhesive modified asphalt and the XPS insulation board.

[0105] A comparison of Examples 1, 4, and Comparative Example 3 reveals that, without the use of ferric oxide, the cohesive strength of the self-adhesive modified asphalt does not significantly change from the glass strength of the aluminum plate. However, the peel strength between the self-adhesive modified asphalt and the XPS insulation board decreases, indicating a decline in the adhesion and wettability of the self-adhesive modified asphalt (Comparative Example 3). Furthermore, only when surfactants, polyaluminum ferric chloride, and ferric oxide are all present and the formulation is appropriate can the obtained self-adhesive modified asphalt exhibit excellent wettability and adhesion to XPS.

[0106] Comparison of Example 1, Comparative Example 4 and Comparative Example 5 revealed that the electric field can effectively enhance the enrichment of polyaluminum ferric chloride on the surface, which is beneficial for the wetting of the self-adhesive modified waterproof membrane on the XPS insulation board.

[0107] Through comparison of Example 1 and Comparative Example 6, it was found that secondary heating is beneficial to the rearrangement of polar groups such as surfactants and polyaluminum ferric chloride on the surface, which is beneficial to the wetting of self-adhesive modified waterproof membrane on XPS insulation board.

[0108] In summary, the self-adhesive modified bitumen and self-adhesive modified bitumen waterproof membrane provided in this disclosure can effectively solve the problems of low adhesion and weak bonding of conventional self-adhesive modified bitumen on insulation boards. It changes the traditional roof construction method of multiple construction steps, such as applying cement mortar leveling layers, isolation layers, or brushing primers onto insulation boards, and is of great significance for reducing construction costs, reducing roof load, and saving project costs.

[0109] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of this disclosure. It should be understood that the above descriptions are merely specific embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A self-adhesive modified bitumen, comprising, by weight percentage: 3-30wt% base asphalt, 20-30wt% aromatic oil, 3-5wt% thermoplastic elastomer, 5-8wt% rubber modifier, 5-10wt% tackifying resin, 3-8wt‰ sodium diisooctyl sulfosuccinate, 1-3wt‰ polyaluminum ferric chloride, 1-3wt‰ iron(III) oxide, 0.5-1wt% limestone powder; and 10-30wt% inorganic filler.

2. The self-adhesive modified asphalt according to claim 1, wherein, The base asphalt includes a first base asphalt and a second base asphalt; The first base asphalt is selected from 3-5 wt% of 0#-30# base asphalt, wherein the asphalt content in the 0#-30# base asphalt is 60-80 wt%. The second base asphalt is selected from 20-30 wt% of 70# base asphalt, wherein the asphalt content is 10-13 wt%, the resin content is 20-30 wt%, the aromatic content is 25-40 wt%, and the saturated content is 20-35 wt%.

3. The self-adhesive modified asphalt according to claim 1, wherein, The limestone particles formed by mixing the polyaluminum ferric chloride, sodium diisooctyl sulfosuccinate, and iron oxide in limestone powder are dispersed in a self-adhesive modified asphalt intermediate composed of the base asphalt, aromatic oil, thermoplastic elastomer, rubber modifier, tackifying resin, and inorganic filler.

4. The self-adhesive modified asphalt according to claim 1, wherein, The thermoplastic elastomer is selected from any one of styrene-butadiene-styrene block copolymer, thermoplastic polyolefin elastomer, thermoplastic dynamic vulcanized rubber, and thermoplastic polyurethane, with a molecular weight of 130,000 to 180,000. The rubber modifier is selected from at least one of butyl rubber and styrene-butadiene rubber; The tackifying resin is selected from at least one of C5 petroleum resin and C9 petroleum resin; The inorganic filler is a mixture of silicates and carbonates with a fineness of 200-400 mesh.

5. A method for preparing self-adhesive modified asphalt as described in any one of claims 1-4, comprising: The base asphalt, aromatic oil, thermoplastic elastomer, rubber modifier, tackifying resin and inorganic filler are mixed evenly to obtain a self-adhesive modified asphalt intermediate. Polyaluminum ferric chloride, sodium diisooctyl sulfosuccinate, and iron oxide are uniformly mixed in limestone powder to obtain limestone particles. The limestone particles are uniformly dispersed into the self-adhesive modified asphalt intermediate using a screw press to obtain the self-adhesive modified asphalt.

6. A method for preparing a self-adhesive modified bitumen waterproof membrane, comprising: A waterproof substrate is provided, which comprises, from top to bottom: a surface isolation layer, a first modified bitumen layer, a reinforced base layer, a second modified bitumen layer, and an isolation layer; The self-adhesive modified bitumen as described in any one of claims 1-4 is coated onto the lower surface of the isolation layer to obtain a nascent waterproof membrane; The nascent waterproof membrane is placed in the electric field of a dual-electrode plate, with the surface of the self-adhesive modified bitumen facing the cathode side of the electrode plate. Under the action of the applied electric field, ferric oxide, carrying polyaluminum ferric chloride and sodium diisooctyl sulfosuccinate, migrates to the surface of the self-adhesive modified bitumen facing the cathode side. After the electric field is applied, hot air is used to heat the self-adhesive modified asphalt to form a self-adhesive modified asphalt layer. After cooling and setting, a silicone-coated release film is applied to the self-adhesive modified bitumen layer to obtain the self-adhesive modified bitumen waterproof membrane.

7. A self-adhesive modified bitumen waterproof membrane, prepared by the preparation method described in claim 6.

8. The self-adhesive modified bitumen waterproof membrane according to claim 7, wherein, The width of the isolation layer is smaller than the width of the self-adhesive modified asphalt layer. The self-adhesive modified asphalt layer is formed by coating multiple self-adhesive modified asphalt strips in a strip array on the isolation layer, wherein the self-adhesive modified asphalt strips at both ends serve as overlapping edges and are directly bonded to the second modified asphalt layer. In this configuration, the multiple self-adhesive modified asphalt strips in the middle form a continuous whole with the same width as the isolation layer; or the multiple self-adhesive modified asphalt strips in the middle are arranged in an array with a spacing of 3-10cm between each other, and form a channel for venting steam with the isolation layer, and the width of the self-adhesive modified asphalt strips between the overlapping edges is 2-8cm. The width of the overlapping edge is 8-12cm.

9. The self-adhesive modified bitumen waterproof membrane according to claim 8, wherein, The isolation membrane is a composite aluminum foil membrane, which is composed of a hydrophobic layer and aluminum foil stacked together. The hydrophobic layer may be a single layer or two layers. When the hydrophobic layer is a double layer, the hydrophobic layer is located on the upper and lower surfaces of the aluminum foil, and the hydrophobic layers on the upper and lower surfaces may be the same or different.

10. The self-adhesive modified bitumen waterproof membrane according to claim 9, wherein, During construction, the silicone-coated isolation base film is removed, and the self-adhesive modified asphalt layer is directly bonded to the insulation board; The insulation board is selected from polystyrene insulation boards.

Images