Novel modified oxidized asphalt polyethylene tire waterproof coiled material

Abstract

The invention relates to the technical field of waterproof coiled materials, in particular to a novel modified oxidized asphalt polyethylene tire waterproof coiled material. Comprising an asphalt layer made of modified asphalt impregnated materials and further comprises at least two composite polyethylene base layers located in the asphalt layer, and an inner core layer is arranged between any two adjacent composite polyethylene base layers. Composite components including modified sepiolite are creatively introduced into the composite polyethylene tire layer, the high temperature resistance of the polyethylene material can be improved through cooperation, and the modified sepiolite and the polyethylene material can obtain higher interface bonding acting force; the inner core layer is creatively arranged, the glass transition temperature of the inner core layer is lower than that of polyethylene, when the polyethylene cracks due to molecular bond fracture in a high-temperature environment, the inner core layer can fill gaps in a viscous flow state, a certain degree of self-repairing function is achieved, and the situation that the waterproof performance is reduced due to the cracks is avoided; and the inner core layer can be matched with the composite polyethylene tire layer to obtain more long-acting high-temperature-resistant waterproof performance.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof roll materials, and in particular to a novel modified oxidized asphalt polyethylene waterproof roll material. Background Art

[0002] Modified oxidized asphalt is a binder made by adding rubber, resin, or other fillers, and using oxidation processing measures to improve the performance of asphalt or mixture; according to the reference implementation standard GB 18967-2009, it is a waterproof membrane with a high-density polyethylene film as the matrix, modified asphalt on the upper and lower surfaces, and an isolation material covering the surface.

[0003] Modified asphalt polyethylene waterproof membrane is suitable for waterproofing projects of buildings and infrastructure as a waterproof material. The performance of waterproof materials directly affects the waterproof life, etc.; however, polyethylene film will age and crack in high temperature environment; common polyethylene composite waterproof membranes are affected by polyethylene and have the above problems. At present, most commercially available polyethylene waterproof membranes have a high temperature resistance range of up to 60℃-90℃, that is, the waterproof membrane is prone to cracking and other damage in this temperature range or exceeding this temperature, and this high temperature range is easier to break in some production sites or outdoor direct sunlight areas; once the waterproof membrane has structural problems such as cracks, it will directly affect the waterproof effect, resulting in a significant reduction in the service life of this type of waterproof membrane in this environment.

[0004] In order to address and solve the problem of high temperature resistance of waterproof membrane in the above-mentioned problem, we consider preparing a waterproof membrane with certain self-repair function in the event of thermal damage and cracking in the later stage, so as to further improve the effective use range and effect of the membrane; in view of this, we propose a new modified oxidized asphalt polyethylene base waterproof membrane. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies mentioned in the above background technology and provide a new type of modified oxidized asphalt polyethylene waterproof membrane.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A novel modified oxidized asphalt polyethylene waterproofing membrane comprises an asphalt layer made of modified asphalt impregnated material, the waterproofing membrane also comprises at least two composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is arranged between any two adjacent composite polyethylene tire layers.

[0008] Preferably, the composite polyethylene tire layer uses polyethylene as the base material, and the mass percentage of other components in polyethylene is specifically as follows:

[0009]

[0010] Preferably, the composite polyethylene tire layer contains 0.15-0.6% by mass of composite high temperature resistant filler of the polyethylene raw material, and the composite high temperature resistant filler is any one or more of nano silicon oxide, aluminum oxide and ceramic fiber.

[0011] Preferably, the composite high temperature resistant filler specifically comprises nano silicon oxide, aluminum oxide and ceramic fiber in a mass ratio of 1-2:1:1.

[0012] Preferably, the specific preparation process steps of the modified sepiolite are as follows:

[0013] Step 1: Place the sepiolite raw material in 0.3-0.5 mol / L NaOH solution and stir for 10-20 min;

[0014] Step 2: Put the sepiolite into N,N-dimethylformamide solvent and stir at 1300-1500r / min for 20-40min until it is fully dispersed;

[0015] Step 3: Add epichlorohydrin to the mixed solution of step 2, stir at 300-500 r / min for 1-1.5 h at room temperature, then add polyethyleneimine and stir for 20-30 min;

[0016] Step 4: Centrifuge the mixed solution, wash, separate, dry, and sieve.

[0017] Preferably, 1 wt% of polyethyleneimine is used in the above step 3, and the mass ratio of the polyethyleneimine to the sepiolite raw material is 1:1.9-2.1.

[0018] Preferably, the particle size of the modified sepiolite is controlled to be in the range of 25-38 μm.

[0019] Preferably, the inner core layer uses polymethyl methacrylate as the base material, and the mass percentage of each component is specifically as follows:

[0020]

[0021] Preferably, the specific preparation process of the inner core layer is:

[0022] Step 1: Weigh and mix the raw materials according to the proportion, and transfer them into the injection molding machine or hot press;

[0023] Step 2: Control the melt blending temperature to 120-150°C, process for 10-20 minutes, and simultaneously apply a pressure of 10-20 MPa;

[0024] Step 3: Extrusion leveling, applying air blowing or cold water bath cooling to form.

[0025] Preferably, a polyester glass fiber cloth layer is provided at least one between the composite polyethylene tire layer and the inner core layer, inside the composite polyethylene tire layer, or in the inner core layer.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The novel modified oxidized asphalt polyethylene waterproof membrane has a composite polyethylene tire layer that creatively introduces composite components including modified sepiolite, which can synergistically improve the high-temperature resistance of the polyethylene material. The modified sepiolite can obtain a stronger interface bonding force with the polyethylene material; and an inner core layer is creatively provided in the membrane structure, and the inner core layer has a glass transition temperature lower than that of polyethylene. When molecular bonds of the polyethylene break and cracks occur in a high-temperature environment, the inner core layer can fill the gaps in a viscous flow state, achieving a certain degree of self-repairing function, avoiding cracks and causing a decrease in waterproof performance. The inner core layer can cooperate with the composite polyethylene tire layer to obtain more long-lasting high-temperature resistant and waterproof performance. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] The present invention describes the above technical solution in detail through the following embodiments:

[0030] Example 1

[0031] A novel modified oxidized asphalt polyethylene waterproof membrane, the present embodiment comprises an asphalt layer made of SBS modified asphalt impregnated material, and also comprises two layers of composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is provided between the two adjacent layers of composite polyethylene tire layers; in the present embodiment, the asphalt layer is controlled to be 1.8 mm, the composite polyethylene tire layer is 4 mm, and the inner core layer is 2 mm; a 0.35 mm thick polyester glass fiber cloth layer is provided between the composite polyethylene tire layer and the inner core layer.

[0032] The composite polyethylene tire layer of this embodiment uses polyethylene as the base material, and the mass percentage of other components in polyethylene is as follows:

[0033]

[0034]

[0035] It needs to be explained that: the N,N-dimethylformamide in this component is modified with the hydroxyl group as a surface modifier, and its polyethyleneimine can form a uniform coating on the surface of the sepiolite, provide amine functional groups, obtain greater interface bonding strength with the polyethylene group, and improve the internal structural strength to reduce the probability of cracking;

[0036] In addition: triphenyl phosphate and 2,2'-methylenebis-(4-methyl-6-tert-butylphenol) can form chemical bonds with polyethylene after hot melt blending, thereby improving the thermal stability and high temperature resistance of polyethylene, stabilizing the polyethylene molecular chain, preventing chain damage and thermal degradation, and then improving the heat resistance of polyethylene; zinc chloride has thermal stability and lubricity, and can delay the thermal decomposition and fracture of polyethylene; hexaphenyldistanane is an organic tin stabilizer that can inhibit the occurrence of thermal decomposition reactions and improve the heat resistance of polyethylene.

[0037] The composite polyethylene tire layer contains a composite high-temperature resistant filler accounting for 0.5% of the weight percentage of the polyethylene raw material. The composite high-temperature resistant filler is any one or more of nano-silicon oxide, aluminum oxide, and ceramic fiber. In this embodiment, the composite high-temperature resistant filler specifically includes nano-silicon oxide, aluminum oxide, and ceramic fiber in a weight ratio of 2:1:1.

[0038] The main function of this type of filler is to improve its resistance to thermal expansion and improve its mechanical strength. The surface of the filler can also interact with polyethylene to improve the thermal stability and high temperature resistance of the material. At the same time, nano-silicon oxide can form a uniformly dispersed three-dimensional network structure in polyethylene, which can increase the interface area and hinder the movement of the chain, improve the performance of polyethylene, and can absorb, disperse and insulate thermal energy, thereby improving the high temperature resistance and mechanical properties of polyethylene.

[0039] The specific preparation process steps of modified sepiolite are as follows:

[0040] Step 1: Place the sepiolite raw material in 0.3 mol / L NaOH solution and stir for 20 min;

[0041] Step 2: Put the sepiolite into N,N-dimethylformamide solvent and stir at 1500r / min for 20min until it is fully dispersed;

[0042] Step 3: Add epichlorohydrin to the mixed solution of step 2, stir at 350 r / min for 1.5 h at room temperature, then add polyethyleneimine and stir for 30 min; 1 wt % polyethyleneimine is used, and the mass ratio of polyethyleneimine to sepiolite raw material is 1:2.

[0043] Step 4: centrifuge the mixed solution, wash, separate, dry, refine and sieve to control the particle size of the modified sepiolite to be uniformly 28 μm.

[0044] It is worth noting that the inner core layer of this embodiment uses polymethyl methacrylate as the base material, and the mass percentage of each component is specifically as follows:

[0045]

[0046] The specific preparation process of the inner core layer is as follows:

[0047] Step 1: Weigh and mix the raw materials according to the proportion, and transfer them into the injection molding machine or hot press;

[0048] Step 2: Control the melt blending temperature to 135°C, process for 15 minutes, and simultaneously apply a pressure of 20 MPa;

[0049] Step 3: Extrusion leveling, applying air blowing cooling and forming.

[0050] Important points to explain: The inner core layer adjusts the glass transition temperature by controlling the content of butyl acetate and butyl butyrate. Nanosilicone can improve the compatibility of materials and improve the uniformity of fusion, mainly to enhance the interaction between polymethyl methacrylate and butyl acetate and butyl butyrate, thereby improving the degree of fusion; and polyvinyl alcohol can increase the viscosity of the material, so that the viscous flow state can adhere and fill the gaps; the key point is that the process of transformation from the glass state to the viscous flow state is reversible, which is a reversible phase change. When the temperature drops, it will fix again, which is especially suitable for waterproofing and high temperature resistant parts such as roofs.

[0051] Example 2

[0052] A novel modified oxidized asphalt polyethylene waterproof membrane, the present embodiment comprises an asphalt layer made of SBS modified asphalt impregnated material, and also comprises two layers of composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is provided between the two adjacent layers of composite polyethylene tire layers; in the present embodiment, the asphalt layer is controlled to be 1.8 mm, the composite polyethylene tire layer is 4 mm, and the inner core layer is 2 mm; a 0.35 mm thick polyester glass fiber cloth layer is provided between the composite polyethylene tire layer and the inner core layer.

[0053] The difference between this embodiment and embodiment 1 is that the composite polyethylene tire layer of this embodiment also uses polyethylene as the base material, but the specific component types account for the percentage of polyethylene by mass as follows:

[0054]

[0055] That is, in this embodiment, no modified sepiolite is added, and other conditions are the same.

[0056] Example 3

[0057] A novel modified oxidized asphalt polyethylene waterproof membrane, the present embodiment comprises an asphalt layer made of SBS modified asphalt impregnated material, and also comprises two layers of composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is provided between the two adjacent layers of composite polyethylene tire layers; in the present embodiment, the asphalt layer is controlled to be 1.8 mm, the composite polyethylene tire layer is 4 mm, and the inner core layer is 2 mm; a 0.35 mm thick polyester glass fiber cloth layer is provided between the composite polyethylene tire layer and the inner core layer.

[0058] The difference between this embodiment and embodiment 1 is that the nano silicon oxide, aluminum oxide and ceramic fiber in a mass ratio of 2:1:1 are not provided in this embodiment, and other conditions are the same.

[0059] Example 4

[0060] A novel modified oxidized asphalt polyethylene waterproof membrane, the present embodiment comprises an asphalt layer made of SBS modified asphalt impregnated material, and also comprises two layers of composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is provided between the two adjacent layers of composite polyethylene tire layers; in the present embodiment, the asphalt layer is controlled to be 1.8 mm, the composite polyethylene tire layer is 4 mm, and the inner core layer is 2 mm; a 0.35 mm thick polyester glass fiber cloth layer is provided between the composite polyethylene tire layer and the inner core layer.

[0061] The difference between this embodiment and embodiment 1 is that polyvinyl alcohol is not added during the preparation of the inner core layer in this embodiment.

[0062] Example 5

[0063] A novel modified oxidized asphalt polyethylene waterproof membrane, the present embodiment comprises an asphalt layer made of SBS modified asphalt impregnated material, and also comprises two layers of composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is provided between the two adjacent layers of composite polyethylene tire layers; in the present embodiment, the asphalt layer is controlled to be 1.8 mm, the composite polyethylene tire layer is 4 mm, and the inner core layer is 2 mm; a 0.35 mm thick polyester glass fiber cloth layer is provided between the composite polyethylene tire layer and the inner core layer.

[0064] The difference between this embodiment and embodiment 1 is that in the preparation process of the inner core layer in this embodiment, no polyester glass fiber cloth layer is provided between the composite polyethylene tire layer and the inner core layer.

[0065] Comparative Example 1

[0066] The difference between this comparative example 1 and example 1 is that: in this comparative example, no inner core layer is provided, and other conditions are the same.

[0067] Comparative Example 2

[0068] The difference between Comparative Example 2 and Example 1 is that in this comparative example, no composite polyethylene tire layer is prepared, polyethylene is directly used to prepare the film layer, and no inner core layer is provided, and other conditions are the same.

[0069] It should be noted that: the specific steps for preparing each waterproof roll material in the above-mentioned embodiments 1-5 are as follows: after preheating the high-speed shearing machine and adding polyethylene to a molten state, the components required for the composite polyethylene tire layer are added, mixed and prepared, and then sent to the coating machine for cooling to obtain a film layer of the required thickness for standby use, and the inner core layer is prepared separately for standby use, cut according to specifications, and each layer is dip-coated with melted SBS and hot-pressed at 5MPa for hot-pressing molding, and then cooled to obtain a sample; according to the conditions of the above-mentioned embodiments 1-5 and comparative examples 1-2, square samples with a specification of 20 cm are prepared respectively, and waterproof tests are carried out in a simulated high temperature environment: under a humidity of 50%, high temperature environments of 50°C, 70°C, 90°C, and 110°C are applied respectively for accelerated aging test treatment for 240h, and the high temperature aging rate and waterproof performance after aging are simulated and tested, and the specific data are as follows:

[0070]

[0071] According to the data in the above table, the accelerated aging test treatment detection characterization shows that: the inner core layer and the composite polyethylene tire layer have obvious waterproof and high temperature resistance properties, and the waterproof membrane prepared by the invention has obvious high temperature resistance and waterproof ability.

[0072] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0073] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0074] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A novel modified oxidized asphalt polyethylene waterproofing membrane, comprising an asphalt layer made of modified asphalt impregnated material, characterized in that: The waterproof coiled material further comprises at least two layers of composite polyethylene tire layers located inside the asphalt layer, and an inner core layer is arranged between any two adjacent layers of the composite polyethylene tire layers.

2. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 1, characterized in that: The composite polyethylene tire layer uses polyethylene as the base material, and the mass percentage of other components in polyethylene is specifically as follows:

3. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 2, characterized in that: The composite polyethylene tire layer is added with a composite high temperature resistant filler accounting for 0.15-0.6% of the mass percentage of the polyethylene raw material. The composite high temperature resistant filler is any one or more of nano silicon oxide, aluminum oxide and ceramic fiber.

4. The novel modified oxidized asphalt polyethylene waterproofing membrane as claimed in claim 3, characterized in that: The composite high temperature resistant filler specifically comprises nano silicon oxide, aluminum oxide and ceramic fiber in a mass ratio of 1-2:1:

1.

5. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 2, characterized in that: The specific preparation process steps of the modified sepiolite are as follows: Step 1: Place the sepiolite raw material in 0.3-0.5 mol / L NaOH solution and stir for 10-20 min; Step 2: Put the sepiolite into N,N-dimethylformamide solvent and stir at 1300-1500r / min for 20-40min until it is fully dispersed; Step 3: Add epichlorohydrin to the mixed solution of step 2, stir at 300-500 r / min for 1-1.5 h at room temperature, then add polyethyleneimine and stir for 20-30 min; Step 4: Centrifuge the mixed solution, wash, separate, dry, and sieve.

6. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 5, characterized in that: In the above step three, 1 wt% of polyethyleneimine is used, and the mass ratio of the polyethyleneimine to the sepiolite raw material is 1:1.9-2.

1.

7. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 5, characterized in that: The particle size range of the modified sepiolite is controlled to be 25-38 μm.

8. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 1, characterized in that: The inner core layer uses polymethyl methacrylate as the base material, and the mass percentage of each component is as follows:

9. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 8, characterized in that: The specific preparation process of the inner core layer is as follows: Step 1: Weigh and mix the raw materials according to the proportion, and transfer them into the injection molding machine or hot press; Step 2: Control the melt blending temperature to 120-150°C, process for 10-20 minutes, and simultaneously apply a pressure of 10-20 MPa; Step 3: Extrusion leveling, applying air blowing or cold water bath cooling to form.

10. The novel modified oxidized asphalt polyethylene waterproofing membrane according to claim 1, characterized in that: A polyester glass fiber cloth layer is provided at least one place between the composite polyethylene tire layer and the inner core layer, inside the composite polyethylene tire layer or in the inner core layer.

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