Polymer bitumen composite waterproofing membrane and method for preparing the same

Abstract

The application discloses a polymer asphalt composite waterproof roll material and a preparation method thereof. The waterproof roll material comprises an asphalt self-adhesive waterproof layer, an oil separation anti-seepage layer arranged on one side of the asphalt self-adhesive waterproof layer along the thickness direction of the asphalt self-adhesive waterproof layer, and a polymer waterproof layer arranged on the side of the oil separation anti-seepage layer away from the asphalt self-adhesive waterproof layer. The oil separation anti-seepage layer comprises two or more permeation pressure gradient layers arranged between the asphalt self-adhesive waterproof layer and the polymer waterproof layer. By arranging the oil separation anti-seepage layer on one side of the asphalt self-adhesive waterproof layer along the thickness direction of the asphalt self-adhesive waterproof layer and arranging the polymer waterproof layer on the side of the oil separation anti-seepage layer away from the asphalt self-adhesive waterproof layer, the oil separation anti-seepage layer forms a multilayer gradient permeation pressure in the direction of oil migration, the change of the permeation pressure hinders the migration of oil from the asphalt self-adhesive waterproof layer to the polymer waterproof layer, the yellowing and performance change of the polymer waterproof layer are prevented, and the waterproof roll material has good waterproof effect and service life.

Description

Technical Field

[0001] This application belongs to the field of waterproof membrane technology, and particularly relates to a polymer bitumen composite waterproof membrane and its preparation method. Background Technology

[0002] Existing TPO waterproof membranes have a structure consisting of, from top to bottom, a protective layer, a TPO waterproof layer, an asphalt self-adhesive waterproof layer, and a release layer. Thermoplastic polyolefin (TPO) is a thermoplastic plastic blended from polyolefin materials such as polypropylene (PP) and ethylene-octene copolymer (POE). It combines the high impact resistance of polypropylene with the high toughness of ethylene-octene copolymer, exhibiting excellent overall performance. The inventors of this application have discovered that without a release layer between the TPO waterproof layer and the asphalt self-adhesive waterproof layer, oil from the asphalt self-adhesive waterproof layer can penetrate into the TPO waterproof layer, causing yellowing and potentially altering its performance, thus reducing the waterproofing effect of the TPO waterproof membrane. Summary of the Invention

[0003] This application provides a polymeric bitumen composite waterproof membrane and its preparation method, which can effectively prevent oil in the bitumen self-adhesive waterproof layer from migrating and penetrating into the polymeric waterproof layer.

[0004] In a first aspect, this application provides a polymeric bitumen composite waterproof membrane, comprising: a self-adhesive bitumen waterproof layer; an oil-based waterproof layer disposed on either side of the two opposing surfaces of the self-adhesive bitumen waterproof layer along its thickness direction; and a polymeric waterproof layer extending from the surface of the oil-based waterproof layer away from the self-adhesive bitumen waterproof layer; the oil-based waterproof layer comprising two or more osmotic pressure gradient layers disposed between the self-adhesive bitumen waterproof layer and the polymeric waterproof layer.

[0005] According to an embodiment of the first aspect of this application, the oil-proof layer comprises two or more osmotic pressure gradient layers of different densities.

[0006] According to an embodiment of the first aspect of this application, the osmotic pressure of two or more layers of osmotic pressure gradient decreases layer by layer along the direction from the asphalt self-adhesive waterproof layer to the polymer waterproof layer.

[0007] According to an embodiment of the first aspect of this application, the osmotic pressure of two or more osmotic pressure gradient layers decreases layer by layer along the direction from the polymer waterproof layer to the asphalt self-adhesive waterproof layer.

[0008] According to the embodiment of the first aspect, two or more layers of osmotic pressure gradient layers are stacked in a composite configuration.

[0009] According to an embodiment of the first aspect of this application, the oil-proof layer is formed by co-extrusion composite of two or more layers of osmotic pressure gradient layers.

[0010] According to an embodiment of the first aspect, the osmotic pressure gradient layer is made of a blend comprising thermoplastic polyolefin elastomer, polyethylene, and polypropylene, wherein, based on the weight parts of the osmotic pressure gradient layer, the osmotic pressure gradient layer comprises 40 to 60 parts of thermoplastic polyolefin elastomer and 30 to 45 parts of polyethylene.

[0011] According to an embodiment of the first aspect of this application, the osmotic pressure gradient layer further includes 10 to 15 parts of grafted modified polyolefin resin.

[0012] According to an embodiment of the first aspect of this application, the grafted modified polyolefin resin is one or more of maleic anhydride-grafted ethylene-octene copolymer and maleic anhydride-grafted polypropylene.

[0013] According to an embodiment of the first aspect of this application, the osmotic pressure gradient layer further includes 10 to 30 parts of dense material.

[0014] According to an embodiment of the first aspect of this application, the dense material is selected from alumina ceramic powder, aluminum powder, aluminum alloy powder, copper powder, copper alloy powder, or a combination thereof.

[0015] According to an embodiment of the first aspect of this application, the dense material is modified with a silane coupling agent.

[0016] According to an embodiment of the first aspect of this application, the mass ratio of the dense material to the silane coupling agent is 1:0.005 to 0.02.

[0017] According to an embodiment of the first aspect of this application, the silane coupling agent is selected from KH550, KH560, KH602, A-151, A-171, A-172 or a combination thereof.

[0018] According to an embodiment of the first aspect, the average particle size of the dense material is 0.05 μm to 30 μm.

[0019] According to an embodiment of the first aspect of this application, the oil-proof layer further includes a dense layer disposed on at least one side in the thickness direction of the osmotic pressure gradient layer.

[0020] According to an embodiment of the first aspect of this application, the dense layer is a metal rolled layer, a metal powder layer, a polymer material, or a composite layer of at least two of these materials.

[0021] According to an embodiment of the first aspect of this application, the material forming the dense layer is selected from aluminum, aluminum alloys, copper, copper alloys, ethylene-vinyl alcohol copolymers, or combinations thereof.

[0022] According to an embodiment of the first aspect of this application, the thickness of the dense layer is 5 μm to 10 μm.

[0023] According to the embodiments of the first aspect of this application, the polymer waterproof layer is one or a composite layer of thermoplastic polyolefin, high-density polyethylene sheet, or a combination of multiple materials.

[0024] According to an embodiment of the first aspect of this application, the thermoplastic polyolefin comprises, by weight, 93 to 97 parts of polyolefin resin and 2 to 3 parts of composite antioxidant masterbatch.

[0025] According to an embodiment of the first aspect, the thermoplastic polyolefin further includes 2 to 3 parts of color masterbatch.

[0026] According to an embodiment of the first aspect of this application, the high-density polyethylene sheet comprises, by weight, 93 to 97 parts of high-density polyethylene resin and 2 to 3 parts of composite antioxidant masterbatch.

[0027] According to an embodiment of the first aspect, the high-density polyethylene sheet further includes 2 to 3 parts of color masterbatch.

[0028] According to an embodiment of the first aspect, the asphalt self-adhesive waterproof layer comprises, by weight, 55 to 60 parts asphalt, 4 to 8 parts modifier, 8 to 10 parts adhesive powder, and 32 to 38 parts filler.

[0029] According to the embodiments of the first aspect of this application, the modifier is selected from one or two of styrene-butadiene-styrene block copolymer and styrene-butadiene rubber.

[0030] According to an embodiment of the first aspect of this application, the filler is selected from one or more combinations of heavy calcium carbonate and talc.

[0031] According to an embodiment of the first aspect of this application, the polymer bitumen composite waterproof membrane further includes a backing layer covering the polymer waterproof layer.

[0032] According to an embodiment of the first aspect of this application, the backing layer is one of short-fiber polyester geotextile, polyester geotextile, polyester nonwoven fabric, polyester mesh fabric, and fiberglass mesh fabric.

[0033] According to an embodiment of the first aspect of this application, the basis weight of the backing layer is 80 g / m². 2 ~180g / m 2 .

[0034] According to an embodiment of the first aspect of this application, the polymer bitumen composite waterproof membrane further includes an isolation layer that covers the side surface of the bitumen self-adhesive waterproof layer facing away from the oil-based seepage-proof layer.

[0035] According to an embodiment of the first aspect of this application, the isolation layer may be selected from PE, PET, metallized PET, or PETG.

[0036] According to an embodiment of the first aspect of this application, the thickness of the isolation layer is 0.03 mm to 0.05 mm.

[0037] Secondly, this application provides a method for preparing a polymeric bitumen composite waterproof membrane, comprising: providing a pre-formed polymeric material layer and a pre-formed oil-based waterproof material layer, wherein the pre-formed oil-based waterproof material layer comprises two or more pre-formed osmotic pressure gradient material layers; placing the pre-formed oil-based waterproof material layer on any one of the opposite surfaces of the pre-formed polymeric material layer along its own thickness direction to obtain a polymeric semi-finished product; providing a molten raw material mixture to form a bitumen self-adhesive waterproof layer; coating the molten raw material mixture to form a pre-formed bitumen self-adhesive material layer; and covering the pre-formed bitumen self-adhesive material layer with the polymeric semi-finished product to obtain a polymeric bitumen composite waterproof membrane with a stacked bitumen self-adhesive waterproof layer, an oil-based waterproof layer, and a polymeric waterproof layer.

[0038] According to an embodiment of the second aspect, a preformed polymer material layer is provided, comprising: uniformly mixing raw material components for forming a polymer waterproof layer to obtain a first raw material mixture; heating and melting the first raw material mixture and extruding it to obtain a preformed polymer material layer.

[0039] According to an embodiment of the second aspect, a preformed polymer material layer is provided, further comprising: covering one side of the preformed polymer material layer with a backing layer to obtain a preformed polymer material layer including the backing layer.

[0040] According to an embodiment of the second aspect, a pre-formed oil-water barrier material layer is provided, comprising: uniformly mixing raw material components corresponding to the formation of an osmotic pressure gradient layer to obtain a second raw material mixture; heating and melting the second raw material mixture and extruding it to obtain a corresponding pre-formed osmotic pressure gradient material layer; and stacking multiple pre-formed osmotic pressure gradient material layers in a preset stacking sequence to obtain a pre-formed oil-water barrier material layer.

[0041] According to an embodiment of the second aspect, a pre-formed oil-proofing material layer is provided, further comprising: forming a dense layer on one side of the pre-formed osmotic pressure gradient layer along its own thickness direction to obtain a pre-formed osmotic pressure gradient layer containing the dense layer.

[0042] According to an embodiment of the second aspect, forming a preformed asphalt self-adhesive material layer further includes: laying a release film before coating the molten raw material mixture; coating the molten raw material mixture on the release film to form a preformed asphalt self-adhesive material layer including the release film.

[0043] The polymer-asphalt composite waterproof membrane and its preparation method according to embodiments of this application involve setting an oil-proof layer on either side of the asphalt self-adhesive waterproof layer along its thickness direction, and setting a polymer waterproof layer on the side of the oil-proof layer away from the asphalt self-adhesive waterproof layer. This positions the oil-proof layer between the asphalt self-adhesive waterproof layer and the polymer waterproof layer. Utilizing two or more osmotic pressure gradient layers included in the oil-proof layer, a multi-layered gradient osmotic pressure is formed along the oil migration direction from the asphalt self-adhesive waterproof layer to the polymer waterproof layer. This change in osmotic pressure effectively hinders the migration and penetration of oil from the asphalt self-adhesive waterproof layer to the polymer waterproof layer, thus blocking the oil and preventing yellowing and potential changes in the performance of the polymer waterproof layer. This results in a waterproof membrane with excellent waterproofing performance and a long service life. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic cross-sectional view of the polymer bitumen composite waterproof membrane along its thickness direction according to an embodiment of this application.

[0046] Figure 2 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0047] Figure 3 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0048] Figure 4 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0049] Figure 5 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0050] Figure 6 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0051] Figure 7 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0052] Figure 8 This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0053] Figure 9This is a schematic diagram of the oil-based seepage-proof layer in the polymer bitumen composite waterproof membrane of an embodiment.

[0054] Figure 10 These are comparative images of the appearance of polymer bitumen composite waterproof membranes of Example 1 and Comparative Example 3 after heat aging treatment.

[0055] Figure 11 These are comparative images of the appearance of polymer bitumen composite waterproof membranes of Example 3 and Comparative Example 3 after heat aging treatment.

[0056] Figure 12 This is a schematic flowchart of the preparation method of the polymer bitumen composite waterproof membrane provided in the embodiments of this application.

[0057] Explanation of reference numerals in the attached drawings: 1. Asphalt self-adhesive waterproof layer; 2. Oil-based anti-seepage layer; 21. Osmotic pressure gradient layer; 21a. First osmotic pressure gradient layer; 21b. Second osmotic pressure gradient layer; 21c. Third osmotic pressure gradient layer; 21d. Dense layer; A. Dense material; 3. Polymer waterproof layer; 4. Backing layer; 5. Isolation layer; 6. Overlap; X. First direction; Y. Thickness direction. Detailed Implementation

[0058] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0060] As described in the background section, in existing TPO waterproof membranes, there is no barrier layer between the TPO waterproof layer and the asphalt self-adhesive waterproof layer 1. Oil in the asphalt self-adhesive waterproof layer 1 can penetrate into the TPO waterproof layer, causing yellowing and potentially altering its performance, leading to a decrease in its waterproofing effect. In improving the existing solution, the inventors of this application discovered that since TPO, representing polyolefin material, is the main material used to make polymer waterproof layers, it can adsorb oil in the asphalt self-adhesive waterproof layer, thus failing to provide effective blocking. However, in further improvements, the inventors found that polyolefin materials of different densities have different adsorption rates for oil. Osmotic pressure is the pressure caused by the attraction between solute particles and solvent molecules in a solution. Higher-density polyolefin materials have lower rates of oil adsorption and migration than lower-density polyolefin materials. Therefore, the yellowing or even deformation caused by the adsorption of oil by polyolefin materials can be understood as the pressure caused by the attraction of polyolefin materials to oil molecules, which can be understood as the osmotic pressure caused by the adsorption of oil by polyolefin materials. The osmotic pressure of higher oil content is different from that in the asphalt waterproof self-adhesive layer to the polymer waterproof layer.

[0061] To address the problems in the prior art, embodiments of this application provide a polymeric bitumen composite waterproof membrane and its preparation method based on the above findings. The polymeric bitumen composite waterproof membrane provided in the embodiments of this application will be described below. It should be noted that the thickness direction of the polymeric bitumen composite waterproof membrane in this application is Y, and the thickness direction Y of each of its structural layers is consistent. Therefore, the thickness direction of each structural layer can also be represented by Y, and will not be elaborated further thereafter.

[0062] Figure 1 A schematic diagram of the structure of a polymer bitumen composite waterproof membrane according to an embodiment of this application is shown. Figure 1 As shown, the polymer asphalt composite waterproof membrane includes the following layers: an asphalt self-adhesive waterproof layer 1; an oil-based waterproof layer 2, disposed on either side of the asphalt self-adhesive waterproof layer 1 along its thickness direction Y; and a polymer waterproof layer 3, which extends and is disposed on the side of the oil-based waterproof layer 2 away from the asphalt self-adhesive waterproof layer 1. The oil-based waterproof layer 2 includes two or more osmotic pressure gradient layers 21 disposed between the asphalt self-adhesive waterproof layer 1 and the polymer waterproof layer 3.

[0063] The polymer-asphalt composite waterproof membrane of this application embodiment provides an oil-proof layer 2 on either side of the asphalt self-adhesive waterproof layer 1 along its thickness direction Y, and a polymer waterproof layer 3 on the side of the oil-proof layer 2 away from the asphalt self-adhesive waterproof layer 1. This positions the oil-proof layer 2 between the asphalt self-adhesive waterproof layer 1 and the polymer waterproof layer 3. Utilizing the two or more osmotic pressure gradient layers 21 included in the oil-proof layer 2, a multi-layered gradient osmotic pressure is formed along the oil migration direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. This change in osmotic pressure effectively prevents oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3, thus blocking the oil and preventing yellowing and potential changes in the performance of the polymer waterproof layer 3. This results in a waterproof membrane with excellent waterproofing performance and a long service life.

[0064] The polymer asphalt composite waterproof membrane of this application embodiment has an asphalt self-adhesive waterproof layer 1 that can bond to substrates such as metal and concrete. The upper polymer waterproof layer 3 can be overlapped with the substrate to be waterproofed via hot air welding, thereby achieving a good sealing and waterproofing effect. Furthermore, both the asphalt self-adhesive waterproof layer 1 and the polymer waterproof layer 3 can provide waterproofing independently. By combining them into a polymer asphalt composite waterproof membrane layer, the polymer asphalt composite waterproof membrane of this application embodiment can achieve two layers of waterproofing in a single application.

[0065] In some embodiments of this application, the thickness of the oil-proof layer 2 is 20 μm to 80 μm.

[0066] In the polymer bitumen composite waterproof membrane of this application embodiment, by setting an oil-proof layer 2 comprising two or more layers of osmotic pressure gradient 21, the polymer bitumen composite waterproof membrane effectively hinders oil migration. The thickness of the oil-proof layer 2 is within the aforementioned range, which can reduce the material and manufacturing costs of the waterproof membrane while achieving sufficient oil blocking.

[0067] In some embodiments of this application, the oil-proof layer 2 includes two or more layers of osmotic pressure gradient 21 with different densities. These layers of osmotic pressure gradient 21, with their different oil osmotic pressures, form a penetration path that hinders oil migration. This effectively blocks oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3, preventing yellowing of the polymer waterproof layer 3 and potential changes in its performance. This results in a waterproof membrane with good waterproofing effect and service life. It is understood that the osmotic pressure gradient layers 21 with different densities can be obtained by adjusting the content and type of raw material components, or by rolling or pressing different osmotic pressure gradient layers 21.

[0068] In some embodiments, the density of each osmotic pressure gradient layer in two or more osmotic pressure gradient layers 21 can be independently 0.75 g / cm³. 3 ~2g / cm 3 Furthermore, the densities of adjacent osmotic pressure gradient layers are not equal. For example, in a stacked configuration of two osmotic pressure gradient layers, one layer has a density ranging from 0.8 g / cm³. 3 ~2g / cm 3 The density range of the other osmotic gradient layer is 0.75 g / cm³. 3 ~1.5g / cm 3 An oil-proof layer 2 is formed by creating osmotic pressure gradient layers of different densities. These gradient layers prevent oil from migrating and seeping from the asphalt self-adhesive waterproof layer to the polymer waterproof layer, causing the polymer waterproof layer to yellow or even deteriorate, affecting its waterproofing performance. The aforementioned densities can be measured using general density testing methods.

[0069] In some embodiments of this application, such as Figure 2 As shown, the osmotic pressure of the two or more osmotic pressure gradient layers 21 decreases layer by layer along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3.

[0070] For example, such as Figure 3 As shown, the oil-proof layer 2 includes a first osmotic pressure gradient layer 21a of a first density and a second osmotic pressure gradient layer 21b of a second density. The first density is less than the second density. The first osmotic pressure gradient layer 21a and the second osmotic pressure gradient layer 21b are stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. That is, the osmotic pressure of the first osmotic pressure gradient layer 21a is greater than the osmotic pressure of the second osmotic pressure gradient layer 21b. This causes the osmotic pressure of the oil-proof layer 2 to decrease stepwise along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, forming a reverse path that hinders oil migration. This effectively blocks oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3, preventing yellowing of the polymer waterproof layer 3 and possible changes in its performance, thus giving the waterproof membrane a good waterproof effect and service life.

[0071] In some embodiments of this application, the osmotic pressure of two or more osmotic pressure gradient layers 21 decreases layer by layer along the direction from the polymer waterproof layer 3 to the asphalt self-adhesive waterproof layer 1.

[0072] For example, such as Figure 4As shown, the oil-proof layer 2 includes a first osmotic pressure gradient layer 21a of a first density and a second osmotic pressure gradient layer 21b of a second density. The second density is less than the first density. The first osmotic pressure gradient layer 21a and the second osmotic pressure gradient layer 21b are stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. The osmotic pressure of the first osmotic pressure gradient layer 21a is less than that of the second osmotic pressure gradient layer 21b, so that the osmotic pressure of the oil-proof layer 2 gradually increases in the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. Based on the role of the first osmotic pressure gradient layer 21a in hindering oil migration, the second osmotic pressure gradient layer 21b and even more layers of osmotic pressure gradient layers further hinder oil migration, thereby effectively preventing oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3, preventing yellowing of the polymer waterproof layer 3 and possible changes in the performance of the polymer waterproof layer 3, so that the waterproof membrane has good waterproof effect and service life.

[0073] In some embodiments of this application, two or more osmotic pressure gradient layers 21 are stacked and composited. For example, refer to... Figure 3 The oil-proof layer 2 includes two layers of first osmotic pressure gradient layer 21a with a first density and two layers of second osmotic pressure gradient layer 21b with a second density. The first density is less than the second density. Each layer of first osmotic pressure gradient layer 21a and second osmotic pressure gradient layer 21b is stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3 to form a first osmotic pressure gradient layer group. Another layer of first osmotic pressure gradient layer 21a and another layer of second osmotic pressure gradient layer 21b are stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3 to form a second osmotic pressure gradient layer group. The first osmotic pressure gradient layer group 21a and the second osmotic pressure gradient layer group are also stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, thereby forming a multi-layer osmotic pressure gradient layer 21 in the oil-proof layer of the polymer asphalt composite waterproof membrane, effectively preventing the migration and penetration of oil in the asphalt self-adhesive waterproof layer 1 into the polymer waterproof layer 3.

[0074] Exemplarily, in some other embodiments, reference is made to Figure 4The oil-impermeable layer 2 includes two layers of first osmotic pressure gradient layer 21a with a first density and two layers of second osmotic pressure gradient layer 21b with a second density, the second density being less than the first density. A third osmotic pressure gradient layer group is formed by stacking one layer of first osmotic pressure gradient layer 21a and one layer of second osmotic pressure gradient layer 21b along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, respectively. A fourth osmotic pressure gradient layer group is formed by stacking another layer of first osmotic pressure gradient layer 21a and another layer of second osmotic pressure gradient layer 21b along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. The third and fourth osmotic pressure gradient layer groups are also stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3 to achieve high osmotic pressure gradient. In the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, the osmotic pressure of the oil-proof layer 2 gradually increases and then decreases. While the first osmotic pressure gradient layer 21a of the third osmotic pressure gradient layer group hinders oil migration, the second osmotic pressure gradient layer 21b further hinders oil migration. The first osmotic pressure gradient layer 21a and the second osmotic pressure gradient layer 21b of the fourth osmotic pressure layer group further impede oil migration. This effectively prevents oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3, preventing yellowing of the polymer waterproof layer 3 and potential changes in its performance. This results in a waterproof membrane with excellent waterproofing effect and service life.

[0075] For example, such as Figure 5 As shown, the oil-proof layer 2 includes a first osmotic pressure gradient layer 21a of a first density and two second osmotic pressure gradient layers 21b of a second density. The first density is less than the second density. The second osmotic pressure gradient layer 21b, the first osmotic pressure gradient layer 21a, and the second osmotic pressure gradient layer 21b are stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, forming a fifth osmotic pressure gradient layer group. This ensures that the osmotic pressure of the oil-proof layer 2 first decreases, then increases, and then decreases again in the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, forming a path that hinders oil migration. This effectively blocks oil from migrating from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3, preventing yellowing of the polymer waterproof layer 3 and possible changes in its performance, thus giving the waterproof membrane good waterproofing effect and service life.

[0076] In some embodiments of this application, the oil-water barrier layer 2 is formed by co-extrusion of two or more layers of osmotic pressure gradient layers 21, so that the multiple layers of osmotic pressure gradient layers 21 can be more tightly connected into an integrated oil-water barrier layer 2.

[0077] It is understandable that, such as Figure 7 and Figure 9As shown, multiple layers of osmotic pressure gradient layers 21 with different densities can be set to form an oil impermeable layer containing multiple layers of osmotic pressure gradient changes, which hinders the migration of oil.

[0078] In some embodiments of this application, the osmotic pressure gradient layer 21 is made of a blend of thermoplastic polyolefin elastomer, polyethylene, and polypropylene. Specifically, based on weight parts, the osmotic pressure gradient layer 21 comprises 40 to 60 parts of thermoplastic polyolefin elastomer, 30 to 45 parts of polyethylene, and 10 to 15 parts of polypropylene. Different densities of the osmotic pressure gradient layer 21 can be formed using different contents of thermoplastic polyolefin elastomer, polyethylene, and polypropylene.

[0079] Thermoplastic polyolefin elastomers (TPEs) are a class of polymeric materials that combine the elasticity of rubber and the plasticity of plastics. In the embodiments of this application, the thermoplastic polyolefin elastomer may be one or a combination of ExxonMobil's 3000 and 3020, and the polyethylene may be one or a combination of ExxonMobil's 2005 and 2010. The polypropylene may be one or a combination of K8003 and EPS30R from China National Petroleum Corporation's Dushanzi Petrochemical Branch, 660M10T from Sinopec-Saudi Arabia (Tianjin) Petrochemical Co., Ltd., and LC1813 from China Biochemical Coal-to-Oil Chemical Co., Ltd.'s Baotou Coal Chemical Branch.

[0080] In some embodiments of this application, the osmotic pressure gradient layer 21 further includes 10 to 15 parts of grafted modified polyolefin resin, so as to improve the compatibility and bonding strength between the thermoplastic polyolefin elastomer and polyethylene and polypropylene, increase the density of the osmotic pressure gradient layer 21, and reduce the osmotic pressure of the osmotic pressure gradient layer 21 for oil.

[0081] In some embodiments of this application, the grafted modified polyolefin resin is one or more of maleic anhydride-grafted ethylene-octene copolymer and maleic anhydride-grafted polypropylene.

[0082] In the embodiments of this application, maleic anhydride-grafted ethylene-octene copolymer can be selected from Dow Chemical Company's GR209; maleic anhydride-grafted polypropylene can be selected from Arkema Chemical Company's CA100.

[0083] In some embodiments of this application, such as Figures 3-5As shown, the osmotic pressure gradient layer 21 also includes 10 to 30 parts of a dense material A to increase the density of the osmotic pressure gradient layer 21. The dense material A is used to further increase the density of the osmotic pressure gradient layer 21, reduce the osmotic pressure of the osmotic pressure gradient layer 21, and thus prevent oil from migrating to the polymer waterproof layer 3 through the oil seepage prevention layer 2 composed of the osmotic pressure gradient layer 21.

[0084] In some embodiments of this application, the dense material A is selected from alumina ceramic powder, aluminum powder, aluminum alloy powder, copper powder, copper alloy powder, or a combination thereof. This dense material A is fully dispersed with the base material forming the osmotic pressure gradient layer 21, forming a uniform and dense osmotic pressure gradient layer 21. The material's own density prevents oil from migrating from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. Simultaneously, it enhances the density of the osmotic pressure gradient layer, reduces the osmotic pressure of the osmotic pressure gradient layer 21, and hinders the migration and penetration of oil into the osmotic pressure gradient layer 21, which has a lower osmotic pressure.

[0085] In some embodiments of this application, the dense material A is modified by a silane coupling agent, which can further enhance the compatibility and connection strength between the polar dense material A and the base material of the non-polar osmotic pressure gradient layer 21, thereby forming a denser osmotic pressure gradient layer 21 and further reducing the osmotic pressure of the osmotic pressure gradient layer 21.

[0086] In some embodiments of this application, the mass ratio of dense material A to silane coupling agent is 1:0.005 to 0.02. Modifying the dense material with a silane coupling agent meeting this mass ratio allows the dense material to be fully dispersed and grafted onto the base material forming the osmotic pressure gradient layer, improving the compatibility between the dense material and the base material, resulting in a molded product with enhanced resistance to pressure cracking and impact.

[0087] In some embodiments of this application, the silane coupling agent is selected from KH550, KH560, KH602, A-151, A-171, A-172, or combinations thereof. Through modification with the silane coupling agent, the dense material A can achieve better compatibility and bonding strength with the non-polar base material forming the osmotic pressure gradient layer 21, thereby improving the density of the osmotic pressure gradient layer 21. It should be noted that the powdered dense material can be treated with the silane coupling agent by dispersing it in a silane coupling agent solution, and then the silane-modified dense material can be dispersed in the base material forming the osmotic pressure gradient layer 21.

[0088] In some embodiments of this application, the average particle size of the dense material A is 0.05 μm to 30 μm. It is understood that by adding different types, average particle sizes, and amounts of dense material A to the osmotic pressure gradient layer 21, the density and osmotic pressure of the osmotic pressure gradient layer 21 can be adjusted. Smaller average particle size and higher content of dense material A can increase the density of the osmotic pressure gradient layer 21 and reduce the osmotic pressure, effectively reducing the overall thickness of the oil-proof layer 2. This allows the osmotic pressure gradient layer 21 to more effectively prevent oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3. For example, the average particle size of the dense material can be 0.08, 0.1, 0.3, 0.5, 0.8, 1, 1.2, 1.5, 1.8, 2, 2.3, 2.5, 2.7, 3, 3.5, 4, 4.2, 4.6, 4.9, 5.5, 6, 6.5, 7, 7.2, 7.5, 8, 8.5, 8.7, 9, 9.3, 9.6, 10, 10.6, 11, 12, 13.5, 14, 14.8, 15, 16, 17.4, 18, 18.8, 20, 22, 23.5, 24, 25, 26, 27, 28, 29, or 30 μm.

[0089] In some embodiments of this application, the oil impermeable layer 2 further includes a dense layer 21d disposed on at least one side of the thickness direction Y of the osmotic pressure gradient layer 21.

[0090] The polymer-asphalt composite waterproof membrane of this application embodiment further prevents oil from migrating through the oil-proof layer and penetrating into the polymer waterproof layer by a dense layer disposed on at least one side of the surface in the thickness direction of the osmotic pressure gradient layer. This serves to block oil, prevent yellowing of the polymer waterproof layer, and prevent possible changes in the performance of the polymer waterproof layer, thus giving the waterproof membrane good waterproof effect and service life. Preferably, the dense layer is disposed on the side where the osmotic pressure gradient layer and the polymer waterproof layer connect.

[0091] In some embodiments of this application, the dense layer 21d is a metal rolled layer, a metal powder layer, a polymer material, or a composite layer of at least two of these materials.

[0092] The polymer bitumen composite waterproof membrane of this application embodiment uses a dense 21d layer made of the above-mentioned materials to block oil and prevent oil from migrating to the polymer waterproof layer. In particular, the composite layer formed by the above-mentioned materials can further enhance the polymer bitumen composite waterproof membrane's ability to prevent yellowing caused by oil migration, and improve the waterproof performance and overall service life of the waterproof membrane.

[0093] It should be noted that the metal rolled layer can be obtained by rolling or pressing metal or alloy materials, and then connected to the osmotic pressure gradient layer of the oil-blocking layer by pressing or thermal welding. Alternatively, it can be obtained by magnetron sputtering or chemical vapor deposition. Metal powder can be mixed with adhesives and coated to form an effect similar to the metal rolled layer, thus blocking oil migration. Polymer materials can be formed into a dense layer through melt extrusion and calendering.

[0094] In some embodiments of this application, the material forming the dense layer 21d is selected from aluminum, aluminum alloys, copper, copper alloys, ethylene-vinyl alcohol copolymers, or combinations thereof.

[0095] Understandably, the dense layer 21d utilizes the material's own density to block oil migration. Therefore, the thickness of the dense layer 21d does not need to be excessive; a thickness of 5μm to 10μm is sufficient to achieve the purpose of blocking oil. Combined with the osmotic pressure gradient layer of the oil-proof layer, it can further ensure that the polymer bitumen composite waterproof membrane does not yellow and has excellent waterproof performance and overall comprehensive performance.

[0096] In some embodiments of this application, the polymer waterproof layer 3 is a composite layer of one or more of thermoplastic polyolefins and high-density polyethylene sheets. The polymer waterproof layer 3, made of thermoplastic polyolefins and high-density polyethylene sheets, allows it to adapt to waterproofing substrates with significant surface variations.

[0097] In some embodiments of this application, the thermoplastic polyolefin comprises, by weight, 93 to 97 parts of polyolefin resin and 2 to 3 parts of composite antioxidant masterbatch. Thermoplastic polyolefins meeting the above proportions exhibit good adhesion and waterproofing properties. Polyolefin resin (PO) is a polymer material generated by polymerization of α-olefins or cycloolefins, encompassing general-purpose varieties such as polyethylene (PE) and polypropylene (PP), as well as categories such as metallocene polyolefins and polyolefin elastomers (POE). Therefore, the polyolefin resin can be made from TPO material, whose main raw materials include polyolefin elastomer (POE), propylene-based elastomer, polyethylene, and polypropylene. Optionally, the polyolefin elastomer (POE) can be CA10A or CA60A from AnderBasell Industries, Netherlands, and the propylene-based elastomer can be one or a combination of several of ExxonMobil's 3000, 3020, and 6102. Polyethylene (PE) can be selected from one or a combination of several of the following: DFDC-7050, 3220, and M200024 from Anderbase Industries, Netherlands. Polypropylene (PP) can be selected from PPH-T03 from Maoming Branch of China Petroleum & Chemical Corporation or PPB-M02 from Beijing Yanshan Petrochemical Co., Ltd. of China Petrochemical Corporation, or a combination of both.

[0098] In some embodiments of this application, the thermoplastic polyolefin further includes 2 to 3 parts of color masterbatch to give the polymer waterproof membrane a predetermined color, so as to match or be consistent with the substrate or surrounding environment. The color masterbatch is selected from 8000CN and purchased from Anders Basel Industries, Netherlands.

[0099] In some embodiments of this application, the high-density polyethylene sheet comprises, by weight, 93 to 97 parts of high-density polyethylene resin and 2 to 3 parts of composite antioxidant masterbatch. The high-density polyethylene sheet meeting the above proportions exhibits good adhesion and waterproof performance. The composite antioxidant masterbatch is selected from U-pack B225 and purchased from Tianjin Lianlong New Materials Co., Ltd.

[0100] In the embodiments of this application, the high-density polyethylene sheet may be selected from one or a combination of several of the following: TR144 from China Petroleum & Chemical Corporation Maoming Branch, HHMTR-144 from Chevron Phillips Chemical Company, 7000F from China Petroleum & Chemical Corporation Yangzi Petrochemical Company, and TR-130 from China Petroleum & Chemical Corporation Maoming Branch.

[0101] In some embodiments of this application, the high-density polyethylene sheet further includes 2 to 3 parts of color masterbatch to give the polymer waterproof membrane a set color, so as to be consistent with or match the base surface or the surrounding environment.

[0102] In some embodiments of this application, the asphalt self-adhesive waterproof layer 1 comprises, by weight, 55 to 60 parts asphalt, 4 to 8 parts modifier, 8 to 10 parts adhesive powder, and 32 to 38 parts filler. The asphalt self-adhesive waterproof layer 1 formed using the above-mentioned components in parts by weight has good adhesive properties, allowing for better adhesion to the substrate where the waterproof membrane is to be applied.

[0103] In some embodiments of this application, the modifier is selected from one or both of styrene-butadiene-styrene block copolymer (SBS) and styrene-butadiene rubber (SBR). Using the above-mentioned modifier allows the components of the asphalt self-adhesive waterproof layer 1 to be fully melted and dispersed into a unified whole, and enhances the flexibility and adhesive strength of the asphalt self-adhesive waterproof layer 1 to adapt to substrates of different shapes.

[0104] In some embodiments of this application, the filler is selected from one or more combinations of heavy calcium carbonate and talc. The filler can enhance the mechanical strength and service life of the asphalt self-adhesive waterproof layer 1.

[0105] In some embodiments of this application, such as Figure 1As shown, the polymer bitumen composite waterproof membrane also includes a backing layer 4 covering the polymer waterproof layer 3, that is, the backing layer 4 is set on the side of the polymer waterproof layer 3 facing away from the oil-based waterproof layer 2. The backing layer 4 is used to protect the polymer waterproof layer 3 and prevent the polymer bitumen composite waterproof membrane from being damaged.

[0106] In some embodiments of this application, the backing layer 4 is one of short-fiber polyester geotextile, polyester geotextile, polyester nonwoven fabric, polyester mesh fabric, and fiberglass mesh fabric. The basis weight of the backing layer 4 is 80 g / m². 2 ~180g / m 2 For example, the basis weight of the backing layer 4 is 90, 95, 97, 100, 105, 108, 110, 115, 120, 124, 126, 130, 135, 140, 145, 150, 156, 160, 168, 170, 175, or 180 g / m². 2 .

[0107] In some embodiments of this application, such as Figure 1 As shown, the polymer bitumen composite waterproof membrane also includes an isolation layer 5, which covers the side of the bitumen self-adhesive waterproof layer 1 facing away from the oil-based waterproof layer 2. The isolation layer 5 effectively protects the bitumen self-adhesive waterproof layer 1, preventing adhesion to non-use surfaces before use, and facilitating the storage and transportation of the polymer bitumen composite waterproof membrane. Optionally, the thickness of the isolation layer 5 is 0.01 mm to 0.1 mm.

[0108] In some embodiments of this application, the isolation layer 5 may be selected from PE, PET, metallized PET, or PETG. Optionally, the thickness of the isolation layer 5 is 0.03 mm to 0.05 mm, or 0.05 mm to 0.08 mm.

[0109] In some embodiments, such as Figure 1 As shown, the polymer waterproof layer 3 covers the oil-based waterproof layer 2 and extends outward along the first direction X to form an overlap 6. The overlap 6 facilitates connection with adjacent polymer bitumen composite waterproof membranes, allowing the polymer bitumen composite waterproof membranes to be connected into a single waterproof membrane layer. Alternatively, it facilitates connection between the polymer waterproof layer 3 and the substrate to be bonded, achieving a sealing and waterproofing effect.

[0110] It should be noted that, in the appendix Figure 1The overlapping portion 6 is schematically shown in the cross-sectional diagram of the polymer asphalt composite waterproof membrane. It extends from one end to the other along the first direction X, covering the oil-based waterproof layer 2 and protruding beyond the asphalt self-adhesive waterproof layer 1. However, in practice, the overlapping portion 6 can be set at any edge of the overall shape of the polymer asphalt composite waterproof membrane. For example, if the polymer asphalt composite waterproof membrane is rectangular, the polymer waterproof layer 3 can cover the edge of the oil-based waterproof layer 2 in the polymer asphalt composite waterproof membrane with the overlapping portion 6.

[0111] In some embodiments, the width of the overlap portion 6 is 5mm to 200mm. For example, the width of the overlap portion 6 may be 8, 10, 20, 25, 30, 40, 50, 60, 70, 75, 80, 90, 100, 110, 120, 130, 140, 144, 150, 155, 158, 160, 166, 170, 174, 180, 185, 188, 190, 195, or 198mm.

[0112] The polymer bitumen composite waterproof membrane provided in this application embodiment can be applied to different application scenarios with waterproofing requirements, such as underground, indoor, or outdoor environments.

[0113] The second aspect of this application provides a method for preparing a polymeric bitumen composite waterproof membrane, which is also referred to in the following embodiments. Figures 1 to 11 ,like Figure 12 As shown, the preparation method includes: providing a pre-formed polymer material layer and a pre-formed oil-based waterproof material layer, wherein the pre-formed oil-based waterproof material layer includes two or more pre-formed osmotic pressure gradient material layers; setting the pre-formed oil-based waterproof material layer on any one of the opposite surfaces of the pre-formed polymer waterproof layer 3 along its own thickness direction Y to obtain a polymer semi-finished product; providing a molten raw material mixture to form an asphalt self-adhesive waterproof layer 1; coating the molten raw material mixture to form a pre-formed asphalt self-adhesive material layer; and covering the pre-formed asphalt self-adhesive material layer with the polymer semi-finished product to obtain a polymer asphalt composite waterproof membrane with a stacked asphalt self-adhesive waterproof layer 1, an oil-based waterproof layer 2, and a polymer waterproof layer 3.

[0114] In some embodiments of this application, a preformed polymer material layer is provided, comprising: uniformly mixing the raw material components for forming the polymer waterproof layer 3 to obtain a first raw material mixture; heating and melting the first raw material mixture and extruding it to obtain a preformed polymer material layer.

[0115] The method for preparing polymeric asphalt composite waterproof membrane provided in this application embodiment involves placing a pre-formed oil-based waterproofing material layer on either side of the pre-formed polymeric material layer along its thickness direction Y, thus connecting the pre-formed polymeric material layer and the pre-formed oil-based waterproofing material layer containing two or more pre-formed osmotic pressure gradient material layers to form a polymeric semi-layer product. A molten raw material mixture forming the asphalt self-adhesive waterproof layer 1 is then coated to form a pre-formed asphalt self-adhesive material layer. Finally, the polymeric semi-finished product is used to cover the pre-formed asphalt self-adhesive material layer, resulting in an asphalt self-adhesive waterproof layer 1 comprising multiple layers and an oil-based waterproofing material layer. The polymer asphalt composite waterproof membrane consists of an oil-proof layer 2 and a polymer waterproof layer 3. The oil-proof layer 2 contains two or more pre-formed osmotic pressure gradient material layers, which creates a multi-layer gradient osmotic pressure along the oil migration direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. The change in osmotic pressure effectively prevents oil from migrating from the asphalt self-adhesive waterproof layer 1 and penetrating into the polymer waterproof layer 3, thus blocking the oil and preventing yellowing of the polymer waterproof layer 3 and possible changes in its performance. This gives the waterproof membrane a good waterproof effect and service life.

[0116] In some embodiments of this application, a preformed polymer material layer is provided, comprising: uniformly mixing the raw material components for forming the polymer waterproof layer 3 to obtain a first raw material mixture; heating and melting the first raw material mixture and extruding it to obtain a preformed polymer material layer.

[0117] In the embodiments of this application, the preformed polymer material layer can be formed by mixing and melt-extruding the raw material components of the polymer waterproof layer 3. It is understood that for composite structural layers containing multiple materials, they can be obtained by heating, melting, and extruding layer by layer.

[0118] In some embodiments of this application, a pre-formed polymer material layer is provided, further comprising: covering one side of the pre-formed polymer material layer with a backing layer 4, resulting in a pre-formed polymer material layer including the backing layer 4. By providing the backing layer 4 on one side of the pre-formed polymer material layer along its thickness direction Y, effective protection is provided for the final formed polymer waterproof layer 3. For the pre-formed polymer material layer with one side covered by the backing layer 4, when it is set with the pre-formed oil-proof material layer, it must be set on the side of the pre-formed polymer material layer opposite to the backing layer 4.

[0119] In some embodiments of this application, a pre-formed oil-water barrier material layer is provided, comprising: uniformly mixing the raw material components corresponding to the formation of the osmotic pressure gradient layer 21 to obtain a second raw material mixture; heating and melting the second raw material mixture and extruding it to obtain a corresponding pre-formed osmotic pressure gradient material layer; and stacking multiple pre-formed osmotic pressure gradient material layers in a preset stacking order to obtain a pre-formed oil-water barrier material layer.

[0120] The method for preparing polymeric bitumen composite waterproof membrane provided in this application embodiment involves uniformly mixing the raw material components corresponding to the osmotic pressure gradient layer 21 to obtain a second raw material mixture corresponding to each osmotic pressure gradient layer 21. The second raw material mixture is heated, melted, and extruded to obtain a corresponding pre-formed osmotic pressure gradient material layer. Then, multiple pre-formed osmotic pressure gradient material layers are stacked in a preset stacking sequence, so that the pre-formed osmotic pressure gradient material layers can form multiple gradient osmotic pressures in the direction of oil migration from the asphalt self-adhesive waterproof layer 1 to the polymeric waterproof layer 3. The change in osmotic pressure effectively prevents oil from migrating from the asphalt self-adhesive waterproof layer 1 to the polymeric waterproof layer 3, thereby playing a role in blocking oil.

[0121] It should be noted that in some embodiments, the osmotic pressure gradient layer 21 contains either grafted modified polyolefin resin or dense material A, or both of the above materials. The grafted modified polyolefin resin can be obtained by directly adding it to the raw material components for melting and extrusion molding. The osmotic pressure gradient layer 21 containing dense material A can be obtained by dispersing the dense material A in small amounts and multiple times in the raw material components during the mixing, melting, and extrusion molding process, so that the dense material A is uniformly dispersed in the osmotic pressure gradient layer 21.

[0122] In some embodiments of this application, a pre-formed oil-proofing material layer is provided, which further includes: forming a dense layer 21d on one side of the pre-formed osmotic pressure gradient layer 21 along its own thickness direction Y to obtain a pre-formed osmotic pressure gradient layer 21 containing the dense layer 21d.

[0123] The method for preparing the polymeric bitumen composite waterproof membrane provided in this application involves forming a dense layer 21d on one side of the pre-formed osmotic pressure gradient layer 21 along its thickness direction Y. This results in a pre-formed osmotic pressure gradient layer 21 containing the dense layer 21d, and ultimately, an osmotic pressure gradient layer 21 containing the dense layer 21d. This dense layer 21d further hinders the migration and penetration of oil from the bitumen self-adhesive waterproof layer 1 into the polymeric waterproof layer 3. The dense layer 21d can be formed by magnetron sputtering, chemical vapor deposition, laying, coating, or other methods on aluminum, aluminum alloys, copper, copper alloys, or ethylene-vinyl alcohol copolymers.

[0124] For example, a dense layer 21d formed from one of the following raw materials, aluminum, aluminum alloy, copper, and copper alloy, can be formed by mixing metal powder with an adhesive and then coating it onto a pre-formed permeation pressure gradient material layer to better prevent oil migration and penetration into the polymer waterproof layer 3.

[0125] In some embodiments of this application, forming a preformed asphalt self-adhesive material layer further includes: laying a release film before coating the molten raw material mixture; coating the molten raw material mixture on the release film to form a preformed asphalt self-adhesive material layer containing the release film.

[0126] The preparation method of the polymer asphalt composite waterproof membrane provided in this application embodiment lays a release film before melting the raw material mixture to better prevent the asphalt self-adhesive waterproof layer 1 from bonding with the base surface, which facilitates the manufacturing, transportation and storage of the polymer asphalt composite waterproof membrane.

[0127] The technical solution and beneficial effects of this application will be further explained below through specific embodiments and comparative examples. The following are the specifications / requirements of some of the raw materials used in the embodiments and comparative examples and their available sources. Raw materials not mentioned can be obtained through commercial channels and will not be described further in this application.

[0128] Polyolefin resins, grades CA10A and CA60A, were purchased from Anderbase Industries, Netherlands. Thermoplastic polyolefin elastomers, grades 3020 and 3000, were purchased from ExxonMobil. Polyethylene, grades 2005 and 2010, were purchased from ExxonMobil. Polypropylene, grade K8003, was purchased from Dushanzi Petrochemical Company of China National Petroleum Corporation. High-density polyethylene sheets, grade TR144, were purchased from Maoming Branch of China Petroleum & Chemical Corporation. Graft-modified polyolefin resin, maleic anhydride-grafted ethylene-octene copolymer, grade GR209, was purchased from Dow Chemical Company, USA. Ethylene-vinyl alcohol copolymer, i.e., EVOH, grade T102, was purchased from Kuraray Corporation, Japan.

[0129] Example 1

[0130] A polymeric bitumen composite waterproof membrane comprises the following layers: a self-adhesive bitumen waterproof layer 1; an oil-based waterproof layer 2 disposed on at least one of the opposite surfaces of the self-adhesive bitumen waterproof layer 1; a polymeric waterproof layer 3 extended on the opposite surface of the oil-based waterproof layer 2; a backing layer 4 covering the polymeric waterproof layer 3; and an isolation layer 5 covering the opposite surface of the self-adhesive bitumen waterproof layer 1. By weight, the self-adhesive bitumen waterproof layer 1 is composed of 55 parts bitumen, 5 parts SBS, 8 parts adhesive powder, and 32 parts heavy calcium carbonate, wherein the bitumen includes 25 parts of 70# bitumen and 30 parts of 200# bitumen.

[0131] like Figure 3 As shown, the oil-based waterproofing layer 2 includes a two-layer structure of osmotic pressure gradient layer 21 and a dense layer 21d disposed between the asphalt self-adhesive waterproofing layer 1 and the polymer waterproofing layer 3. The osmotic pressure gradient layer 21 includes a first osmotic pressure gradient layer 21a of a first density and a second osmotic pressure gradient layer 21b of a second density. The first density is less than the second density, that is, the osmotic pressure of the first osmotic pressure gradient layer 21a is greater than the osmotic pressure of the second osmotic pressure gradient layer 21b. The first osmotic pressure gradient layer 21a, the second osmotic pressure gradient layer 21b and the dense layer 21d are stacked along the direction from the asphalt self-adhesive waterproofing layer 1 to the polymer waterproofing layer 3.

[0132] The first osmotic gradient layer 21a, by weight, comprises: 60 parts of 3020, 30 parts of 2005, and 10 parts of K8003, and has a density of 1.03 g / cm³. 3 The second osmotic gradient layer 21b comprises 60 parts of 3020, 30 parts of 2005, 10 parts of K8003, and 10 parts of GR209; the dense layer 21d comprises 100 parts of T102; and the density of the second osmotic gradient layer 21b is 0.99 g / cm³. 3 By weight, the polymer waterproof layer 3 is composed of 85 parts CA10A, 10 parts CA60A, 2 parts composite antioxidant masterbatch, and 3 parts color masterbatch. The isolation layer 5 is a 0.03mm PET isolation film.

[0133] Example 2

[0134] A method for preparing a polymeric bitumen composite waterproof membrane as provided in Example 1 includes: providing a pre-formed polymeric material layer and a pre-formed oil-based waterproofing material layer, wherein the pre-formed oil-based waterproofing material layer comprises two pre-formed osmotic pressure gradient material layers and a dense layer 21d; wherein providing the pre-formed polymeric material layer includes: uniformly mixing the raw material components forming the polymeric waterproof layer 3 to obtain a first raw material mixture; heating and melting the first raw material mixture and extruding it to obtain a pre-formed polymeric material layer; covering one side of the pre-formed polymeric material layer with a backing layer 4 to obtain a pre-formed polymeric material layer including the backing layer 4; providing the pre-formed oil-based waterproofing material layer includes: uniformly mixing the raw material components corresponding to forming the first osmotic pressure gradient layer 21a, the second osmotic pressure gradient layer 21b, and the dense layer 21d to obtain a second raw material mixture; heating and melting the second raw material mixture and extruding it to obtain the corresponding pre-formed osmotic pressure gradient material layer and the dense layer 21d; Two layers of pre-formed osmotic pressure gradient material and a dense layer 21d are stacked in a preset stacking sequence to obtain a pre-formed oil-based waterproof material layer. The pre-formed oil-based waterproof material layer is placed on the side of the pre-formed polymer material layer opposite to the backing layer 4 along its own thickness direction Y, to obtain a polymer semi-finished product. A molten raw material mixture is provided to form an asphalt self-adhesive waterproof layer 1. A release membrane is laid, the molten raw material mixture is coated on the release membrane, and another release membrane is covered to form a pre-formed asphalt self-adhesive material layer. The pre-formed asphalt self-adhesive material layer is cooled with water to dry the moisture. The release membrane that is covered later is rolled up, and the polymer semi-finished product is covered over the pre-formed asphalt self-adhesive material layer, so that the pre-formed oil-based waterproof material layer of the polymer semi-finished product is set opposite to the release membrane along its own thickness direction Y, to obtain a polymer asphalt composite waterproof membrane with a stacked release membrane, asphalt self-adhesive waterproof layer 1, oil-based waterproof layer 2, polymer waterproof layer 3, and backing layer 4.

[0135] Example 3

[0136] A polymeric bitumen composite waterproof membrane includes the following layers: a self-adhesive bitumen waterproof layer 1; an oil-based waterproof layer 2 disposed on at least one of the opposite surfaces of the self-adhesive bitumen waterproof layer 1; a polymeric waterproof layer 3 disposed on the side of the oil-based waterproof layer 2 opposite to the self-adhesive bitumen waterproof layer 1 and extending therefrom; a backing layer 4 covering the polymeric waterproof layer 3; and an isolation layer 5 covering the side of the self-adhesive bitumen waterproof layer 1 opposite to the oil-based waterproof layer 2.

[0137] The oil-based waterproof layer 2 includes two osmotic pressure gradient layers 21 disposed between the asphalt self-adhesive waterproof layer 1 and the polymer waterproof layer 3. Each osmotic pressure gradient layer 21 includes a first osmotic pressure gradient layer 21a of a first density, a second osmotic pressure gradient layer 21b of a second density, and a dense layer 21d. The first density is less than the second density. The first osmotic pressure gradient layer 21a, the second osmotic pressure gradient layer 21b, and the dense layer 21d are stacked along the direction from the asphalt self-adhesive waterproof layer 1 to the polymer waterproof layer 3. The asphalt self-adhesive waterproof layer 1, by weight, is made of 55 parts asphalt, 5 parts SBS, 8 parts adhesive powder, and 32 parts heavy calcium carbonate, wherein the asphalt includes 25 parts of 70# asphalt and 30 parts of 200# asphalt.

[0138] By weight, the first osmotic gradient layer 21a comprises: 60 parts of 3020, 30 parts of 2005, and 10 parts of K8003, and the density of the first osmotic gradient layer 21a is 1.03 g / cm³. 3 The second osmotic gradient layer 21b comprises 60 parts of 3020, 30 parts of 2005, 10 parts of K8003, and 10 parts of GR209; the dense layer 21d comprises 100 parts of T102; and the density of the second osmotic gradient layer 21b is 0.99 g / cm³. 3 By weight, the polymer waterproof layer 3 consists of 40 parts TR144, 40 parts K8003, 15 parts 3020, and 2 parts...

[0139] It is made of composite antioxidant masterbatch and 3 parts color masterbatch. The isolation layer 5 is a 0.03mm PET isolation film.

[0140] Example 4

[0141] Example 4 also provides a polymer asphalt composite roll material. The difference between Example 4 and Example 3 is that, by weight, the first osmotic pressure gradient layer 21a in Example 4 comprises 40 parts of 3020, 45 parts of 2005, and 15 parts of K8003, while the remaining components and contents remain unchanged. The density of the first osmotic pressure gradient layer 21a is 1.0382 g / cm³. 3 .

[0142] Example 5

[0143] Example 5 also provides a polymer asphalt composite membrane. The difference between Example 5 and Example 3 is that, by weight, the self-adhesive asphalt waterproof layer in Example 5 includes 60 parts asphalt, 5 parts SBS, 8 parts adhesive powder, and 32 parts heavy calcium carbonate. The asphalt includes 20 parts of 70# asphalt and 40 parts of 200# asphalt.

[0144] Example 6

[0145] Example 6 also provides a polymer asphalt composite roll material. The difference between Example 6 and Example 3 is that: Figure 2 As shown, the oil-water barrier layer 2 includes only the first osmotic pressure gradient layer 21a and the second osmotic pressure gradient layer 21b, and does not include the dense layer 21d.

[0146] Example 7

[0147] Example 7 also provides a polymer asphalt composite roll material. The difference between Example 7 and Example 3 is that the dense layer 21d is replaced with a 5μm thick aluminum layer instead of T102.

[0148] Example 8

[0149] Example 8 also provides a polymer asphalt composite roll material. The difference between Example 8 and Example 3 is that the first osmotic pressure gradient layer 21a includes: 50 parts of 3020, 30 parts of 2005, 10 parts of K8003, and 10 parts of alumina ceramic powder. The average particle size of the alumina ceramic powder is 0.05μm to 0.1μm, and the density of the first osmotic pressure gradient layer 21a is 1.2926 g / cm³. 3 .

[0150] Example 9

[0151] Example 9 also provides a polymer asphalt composite roll material. The difference between Example 9 and Example 3 is that the first osmotic pressure gradient layer 21a includes: 45 parts of 3020, 30 parts of 2005, 10 parts of K8003, and 15 parts of alumina ceramic powder. The average particle size of the alumina ceramic powder is 0.05μm to 0.1μm, and the density of the first osmotic pressure gradient layer 21a is 1.4239 g / cm³. 3 .

[0152] Example 10

[0153] Example 10 also provides a polymer asphalt composite roll material. The difference between Example 10 and Example 3 is that the first osmotic pressure gradient layer 21a comprises: 50 parts of 3020, 30 parts of 2005, 10 parts of K8003, and 10 parts of alumina ceramic powder. The density of the first osmotic pressure gradient layer 21a is 1.2926 g / cm³. 3 The second osmotic pressure gradient layer 21b comprises: 50 parts of 3020, 30 parts of 2005, 10 parts of K8003, 10 parts of GR209, and 10 parts of aluminum alloy powder; the dense layer 21d comprises 100 parts of T102; and the density of the second osmotic pressure gradient layer 21b is 1.16 g / cm³. 3The alumina ceramic powder has an average particle size of 0.05 μm to 0.1 μm, and the aluminum alloy powder has an average particle size of 5 μm to 20 μm.

[0154] Example 11

[0155] Example 11 also provides a polymer asphalt composite roll material. The difference between Example 11 and Example 3 is that: Figure 9 As shown, the oil-based waterproofing layer 2 includes a first osmotic pressure gradient layer 21a of a first density, a second osmotic pressure gradient layer 21b of a second density, and a third osmotic pressure gradient layer 21c of a third density. The first density is greater than the second density, and the second density is greater than the third density. That is, the osmotic pressure of the first osmotic pressure gradient layer 21a is less than the osmotic pressure of the second osmotic pressure gradient layer 21b, and the osmotic pressure of the second osmotic pressure gradient layer 21b is less than the osmotic pressure of the third osmotic pressure gradient layer 21c. The first osmotic pressure gradient layer 21a, the second osmotic pressure gradient layer 21b, and the dense layer 21d are stacked along the direction from the asphalt self-adhesive waterproofing layer 1 to the polymer waterproofing layer 3. The third osmotic pressure gradient layer 21c includes 50 parts of 3020, 30 parts of 2010, and 15 parts of 3000. The density of the first osmotic pressure gradient layer 21a is 1.03 g / cm³. 3 The density of the second osmotic pressure gradient layer 21b is 0.99 g / cm³. 3 The density of the third osmotic pressure gradient layer 21c is 0.89 g / cm³. 3 .

[0156] Example 12

[0157] Example 12 also provides a polymer asphalt composite roll material. The difference between Example 12 and Example 8 is that the oil-based waterproofing layer 2 only includes the first osmotic pressure gradient layer 21a and the second osmotic pressure gradient layer 21b, and does not include the dense layer 21d.

[0158] Example 13

[0159] Example 13 also provides a polymer asphalt composite roll material. The difference between Example 13 and Example 12 is that the first osmotic pressure gradient layer 21a includes: 50 parts of 3020, 30 parts of 2005, 10 parts of K8003, 10 parts of alumina ceramic powder, and 0.1 parts of silane coupling agent A-171.

[0160] It should be noted that the thicknesses of the first osmotic pressure gradient layer, the second osmotic pressure gradient layer, and the third osmotic pressure gradient layer in Examples 1 and 3-13 are all equal.

[0161] Comparative Example 1

[0162] Comparative Example 1 also provides a polymer asphalt composite membrane. The difference between Comparative Example 1 and Example 1 is that no oil-based waterproof layer 2 is provided between the asphalt self-adhesive waterproof layer 1 and the polymer waterproof layer 3.

[0163] Comparative Example 2

[0164] Comparative Example 2 also provides a polymer asphalt composite roll material. The difference between Comparative Example 2 and the polymer asphalt composite roll material of Example 1 is that the oil-water impermeable layer 2 is replaced with polyethylene of the same thickness, and it does not contain the dense layer 21d.

[0165] Comparative Example 3

[0166] Comparative Example 3 also provides a polymer asphalt composite roll material. The difference between Comparative Example 3 and the polymer asphalt composite roll material of Example 1 is that the first and second osmotic pressure gradient layers of the oil-based impermeable layer 2 are replaced with polyethylene and polypropylene of equal thickness and stacked. The polyethylene and polypropylene have the same thickness and do not contain a dense layer 21d.

[0167] Performance Characterization

[0168] Test method:

[0169] (1) Adhesion

[0170] According to section 5.15 of GB / T23441-2009 "Self-adhesive polymer-modified bitumen waterproof membranes", the polymer bitumen composite waterproof membranes of Examples 1, 3-13 and Comparative Examples 1-3 were subjected to tack resistance tests.

[0171] (2) Joint peel strength

[0172] According to the joint peel strength test section of GB / T328.21- "Test Methods for Waterproofing Membranes - Part 21: Polymer Waterproofing Membranes", the polymer bitumen composite waterproofing membranes of Examples 1, 3-13 and Comparative Examples 1-3 were tested for joint peel strength.

[0173] (3) Heat aging treatment

[0174] The polymer-modified bitumen composite waterproof membrane samples from Examples 1, 3-13, and Comparative Examples 1-3 were placed in an electrically heated drying oven with the polymer waterproof layer 3 on top, and treated at 80°C for 15 days. The peel strength between the polymer waterproof layer 3 and the self-adhesive bitumen waterproof layer 1 was tested according to section 5.12.1 of GB / T 23441-2009 "Self-adhesive Polymer Modified Bitumen Waterproof Membranes".

[0175] The performance of the polymer bitumen composite waterproof membranes of Examples 1, 3-13 and Comparative Examples 1-3 is recorded in Table 1 below for comparison:

[0176] Table 1. Comparison of test data for polymeric bitumen composite waterproof membranes in Examples 1, 3-13, and Comparative Examples 1-3.

[0177]

[0178] Notes: " / " in Table 1 indicates that no yellowing was found during the test period. The service life test data in Table 1 refers to the theoretical service life of the roll material under normal non-exposed application scenarios, such as waterproof roll material laid on the exterior or interior walls of basements.

[0179] Comparing the performance test results in Table 1, we can conclude that: Figure 10 The yellow area in the upper middle part represents the color observed in the polymeric bitumen composite waterproof membrane of Comparative Example 3 after heat aging treatment. Figure 10 The white area in the lower middle part is the color observed in the polymer waterproof layer of the polymer bitumen composite waterproof membrane in Example 1 after heat aging treatment; Figure 11 The yellow area in the upper middle part represents the color observed in the polymeric bitumen composite waterproof membrane of Comparative Example 3 after heat aging treatment. Figure 11 The lower white area represents the color observed in the polymeric bitumen composite waterproof membrane of Example 1 after heat aging treatment. This is a comparison of the appearance of the polymeric bitumen composite waterproof membranes of Example 1 and Comparative Example 3 after heat aging treatment. Figure 10 The appearance comparison of the polymer bitumen composite waterproof membranes of Example 3 and Comparative Example 3 after heat aging treatment. Figure 11 It can be clearly concluded that the polymeric bitumen composite waterproof membrane with an oil-proof layer 21 in this application embodiment can effectively block the penetration of oil from the self-adhesive bitumen waterproof layer 1 into the polymeric waterproof layer 3, prevent yellowing of the polymeric waterproof layer 3, and thus avoid changes in the performance of the polymeric waterproof layer 3 due to oil migration, giving the polymeric bitumen composite waterproof membrane a long-term effective waterproofing effect. The polymeric bitumen composite waterproof membrane with an oil-proof layer 21 containing a dense layer has an even better effect in preventing oil penetration. Furthermore, except for some relatively poor performance in Examples 6 and 12, the polymeric bitumen composite waterproof membranes in Examples 1 and 3-13 have better adhesion to the substrate, peel strength, waterproofing performance, and service life than the comparative polymeric bitumen composite waterproof membranes, further proving that the polymeric bitumen composite waterproof membrane with an oil-proof layer in this application embodiment has good oil-blocking performance and better overall performance.

[0180] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A polymer bitumen composite waterproof membrane, characterized in that, include: asphalt Self-adhesive waterproof layer; An oil-proof layer is provided on either side of the two surfaces opposite to each other along the thickness direction of the asphalt self-adhesive waterproof layer. A polymer waterproof layer is provided on the surface of the oil-proof layer, extending outwards from the asphalt self-adhesive waterproof layer. The oil-based waterproofing layer is disposed between the asphalt self-adhesive waterproofing layer and the polymer waterproofing layer. The oil-based waterproofing layer comprises two or more layers of osmotic pressure gradient with different densities, which are stacked and composited. The density of each layer of the osmotic pressure gradient is independently 0.75 g / cm³. 3 ~2g / cm 3 The osmotic pressure gradient layer is made of a blend of thermoplastic polyolefin elastomer, polyethylene, and polypropylene, wherein, by weight, the thermoplastic polyolefin elastomer comprises 40 to 60 parts, polyethylene comprises 30 to 45 parts, and polypropylene comprises 10 to 15 parts.

2. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, In the two or more layers of the osmotic pressure gradient layer, the osmotic pressure of the oil decreases layer by layer along the direction from the asphalt self-adhesive waterproof layer to the polymer waterproof layer; or... In the two or more layers of the osmotic pressure gradient layer, the osmotic pressure of the oil decreases layer by layer along the direction from the polymer waterproof layer to the asphalt self-adhesive waterproof layer.

3. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The oil-water barrier layer is formed by co-extrusion of two or more layers of the permeability gradient layer.

4. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The thickness of the oil-proof layer is 20μm to 80μm.

5. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The osmotic pressure gradient layer also includes 10 to 15 parts of grafted modified polyolefin resin.

6. The polymer bitumen composite waterproof membrane according to claim 5, characterized in that, The grafted modified polyolefin resin is one or more of maleic anhydride-grafted ethylene-octene copolymer and maleic anhydride-grafted polypropylene.

7. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The osmotic pressure gradient layer also includes 10 to 30 parts of dense material.

8. The polymer bitumen composite waterproof membrane according to claim 7, characterized in that, The dense material is selected from alumina ceramic powder, aluminum powder, aluminum alloy powder, copper powder, copper alloy powder, or a combination thereof.

9. The polymer bitumen composite waterproof membrane according to claim 7, characterized in that, The average particle size of the dense material is 0.05 μm to 30 μm.

10. The polymer bitumen composite waterproof membrane according to claim 7, characterized in that, The dense material is modified with a silane coupling agent.

11. The polymer bitumen composite waterproof membrane according to claim 7, characterized in that, The mass ratio of the dense material to the silane coupling agent is 1:0.005 to 0.

02.

12. The polymer bitumen composite waterproof membrane according to claim 10 or 11, characterized in that, The silane coupling agent is selected from KH550, KH560, KH602, A-151, A-171, A-172 or a combination thereof.

13. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The oil-proof layer further includes a dense layer disposed on at least one side of the thickness direction of the osmotic pressure gradient layer.

14. The polymer bitumen composite waterproof membrane according to claim 13, characterized in that, The dense layer is a metal rolled layer, a metal powder layer, a polymer material, or a composite layer of at least two of these materials.

15. The polymer bitumen composite waterproof membrane according to claim 13, characterized in that, The material forming the dense layer is selected from aluminum, aluminum alloys, copper, copper alloys, ethylene-vinyl alcohol copolymers, or combinations thereof.

16. The polymer bitumen composite waterproof membrane according to claim 13, characterized in that, The thickness of the dense layer is 5 μm to 10 μm.

17. The polymer bitumen composite waterproof membrane according to any one of claims 1-11 and 13-15, characterized in that, The polymer waterproof layer is a composite layer of one or more of thermoplastic polyolefins and high-density polyethylene sheets.

18. The polymer bitumen composite waterproof membrane according to claim 17, characterized in that, By weight, the thermoplastic polyolefin comprises 93 to 97 parts of polyolefin resin and 2 to 3 parts of composite antioxidant masterbatch.

19. The polymer bitumen composite waterproof membrane according to claim 17, characterized in that, The thermoplastic polyolefin also includes 2 to 3 parts by weight of color masterbatch.

20. The polymer bitumen composite waterproof membrane according to claim 17, characterized in that, By weight, the high-density polyethylene sheet comprises 93 to 97 parts of high-density polyethylene resin and 2 to 3 parts of composite antioxidant masterbatch.

21. The polymer bitumen composite waterproof membrane according to claim 20, characterized in that, The high-density polyethylene sheet also includes 2 to 3 parts by weight of color masterbatch.

22. The polymer bitumen composite waterproof membrane according to any one of claims 1-11 and 13-15, characterized in that, By weight, the asphalt self-adhesive waterproof layer comprises: 55 to 60 parts asphalt, 4 to 8 parts modifier, 8 to 10 parts adhesive powder, and 32 to 38 parts filler. The modifier is selected from one or two of styrene-butadiene-styrene block copolymer and styrene-butadiene rubber; The filler is selected from one or more of heavy calcium carbonate and talc powder.

23. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The polymer bitumen composite waterproof membrane also includes a backing layer covering the polymer waterproof layer.

24. The polymer bitumen composite waterproof membrane according to claim 23, characterized in that, The backing layer is one of polyester geotextile, polyester mesh, or fiberglass mesh.

25. The polymer bitumen composite waterproof membrane according to claim 23, characterized in that, The backing layer has a basis weight of 80 g / m². 2 ~180g / m 2 .

26. The polymer bitumen composite waterproof membrane according to claim 1, characterized in that, The polymer bitumen composite waterproof membrane also includes an isolation layer, which covers the side of the bitumen self-adhesive waterproof layer that is away from the oil-based seepage prevention layer.

27. The polymer bitumen composite waterproof membrane according to claim 26, characterized in that, The isolation layer is selected from PE, PET, aluminized PET, and PETG.

28. The polymer bitumen composite waterproof membrane according to claim 26, characterized in that, The thickness of the isolation layer is 0.03mm to 0.05mm.

29. A method for preparing a polymer bitumen composite waterproof membrane as described in any one of claims 1-28, characterized in that, include: A preformed polymer material layer and a preformed oil-proof material layer are provided, wherein the preformed oil-proof material layer includes two or more preformed osmotic pressure gradient material layers. The pre-formed oil-proof material layer is placed on either side of the two opposite surfaces of the pre-formed polymer material layer along its own thickness direction to obtain a polymer semi-finished product. Provide a molten raw material mixture to form a self-adhesive waterproof asphalt layer; The molten raw material mixture is coated to form a pre-formed asphalt self-adhesive material layer; The polymer semi-finished product is used to cover the pre-formed asphalt self-adhesive material layer to obtain a polymer asphalt composite waterproof membrane with a stacked asphalt self-adhesive waterproof layer, an oil seepage prevention layer, and a polymer waterproof layer.

30. The preparation method according to claim 29, characterized in that, The preformed polymer material layer is provided, comprising: The raw material components that form the polymer waterproof layer are mixed evenly to obtain the first raw material mixture; The first raw material mixture is heated and melted and then extruded to obtain a pre-formed polymer material layer.

31. The preparation method according to claim 29, characterized in that, The pre-formed oil seepage barrier material layer includes: The raw material components corresponding to the formation of the osmotic pressure gradient layer are mixed evenly to obtain the second raw material mixture; The second raw material mixture is heated and melted and then extruded to obtain the corresponding pre-formed osmotic pressure gradient material layer; By stacking multiple layers of pre-formed permeability gradient material in a predetermined stacking sequence, a pre-formed oil-proofing material layer is obtained.

32. The preparation method according to claim 29, characterized in that, The preformed polymer material layer further includes: A backing layer is covered on one side of the preformed polymer material layer to obtain a preformed polymer material layer including the backing layer.

33. The preparation method according to claim 29, characterized in that, The pre-formed oil seepage barrier material layer further includes: A dense layer is formed on one of the two opposite surfaces of the preformed osmotic pressure gradient material layer along its own thickness direction to obtain a preformed oil-proof material layer containing the dense layer.

34. The preparation method according to claim 29, characterized in that, The formation of the preformed asphalt self-adhesive material layer further includes: A release film is laid before coating the molten raw material mixture; The molten raw material mixture is coated onto a release liner to form a pre-formed asphalt self-adhesive layer containing the release liner.

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