Modified asphalt cold-applied waterproofing membrane and method for preparing the same
By introducing silane coupling agents, polypropylene bundle cross-linked fibers, and glycidyl methacrylate into the modified bitumen waterproof membrane for interface modification, the safety hazards and performance deficiencies during construction of the modified bitumen waterproof membrane were solved, achieving cold construction and performance improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIEKE CHUANGHENG NEW MATERIAL TECH CO LTD
- Filing Date
- 2023-03-30
- Publication Date
- 2026-06-23
Smart Images
Figure BDA0004153320150000041 
Figure BDA0004153320150000051 
Figure BDA0004153320150000052
Abstract
Description
Technical Field
[0001] This invention belongs to the field of waterproof membrane technology, and particularly relates to a modified bitumen cold-laid waterproof membrane and its preparation method. Background Technology
[0002] Waterproof membranes mainly include asphalt waterproof membranes and polymer waterproof membranes. They are primarily used in building walls, roofs, tunnels, highways, landfills, and other locations to resist leakage from external rainwater and groundwater. It is a flexible building material product. As a leak-proof connection between the foundation and the building structure, it serves as the first line of defense for waterproofing the entire project, playing a crucial role in the overall construction process.
[0003] Commonly available modified bitumen waterproof membranes require heating with an open flame until they melt before they can bond to the building surface. However, heating with an open flame can release toxic substances and pose fire hazards. Furthermore, conventional modified bitumen waterproof membranes have drawbacks such as poor tensile strength, poor peel strength, and poor adhesion, making them unable to meet the growing construction demands. Summary of the Invention
[0004] To address the aforementioned problems, the primary objective of this invention is to provide a modified bitumen cold-laid waterproof membrane and its preparation method.
[0005] The specific technical solution of the present invention includes:
[0006] This invention provides a modified bitumen cold-laid waterproof membrane, comprising a polymer sheet, a modified bitumen self-adhesive layer disposed on both sides of the polymer sheet, and a protective film attached to the surface of the modified bitumen self-adhesive layer.
[0007] The modified asphalt self-adhesive layer is treated with an interface modification component before being coated onto the polymer sheet. The interface modification component, by weight percentage, includes 2-3% silane coupling agent, 1-2% polypropylene bundle cross-linked fibers, and 2-3% glycidyl methacrylate.
[0008] As a further optimization of the present invention, the modified asphalt self-adhesive layer comprises, by weight, 40-50 parts asphalt, 10-20 parts styrene-isoprene-styrene block copolymer (SIS), 2-6 parts terpene resin, 6-12 parts naphthenic oil, 0.1-0.5 parts antioxidant, and 10-20 parts filler.
[0009] As a further optimization of the present invention, the polymer sheet comprises, by weight, 20-30 parts of EVA resin, 20-30 parts of high-density polyethylene, 15-25 parts of low-density polyethylene, 10-15 parts of polyolefin elastomer, 1-2 parts of antioxidant, and 5-15 parts of filler.
[0010] As a further optimization of the present invention, the protective film is a PET silicone oil film.
[0011] This invention also provides a method for preparing the modified bitumen cold-laid waterproof membrane as described above, the steps of which include:
[0012] (1) Preparation of modified asphalt self-adhesive layer: Asphalt and naphthenic oil are added to the reaction vessel according to the formula and stirred. The mixture is heated to 145℃ and dehydrated for 1 hour. Then SIS is added and the temperature is raised to 170℃. The modification process is maintained for 3.5 hours. Subsequently, terpene resin is added and stirred at 170℃ for 35 minutes. Finally, filler and antioxidant are added and stirred for 1 hour to obtain modified asphalt self-adhesive layer. During the process, the temperature is controlled at 160℃-170℃.
[0013] (2) Preparation of polymer sheets: EVA resin, high-density polyethylene, low-density polyethylene, polyolefin elastomer, antioxidant and filler are added into the mixing hopper according to the formula and mixed evenly. Then, the mixture is extruded by an extruder, calendered by three rolls, trimmed and cooled to obtain polymer sheets.
[0014] (3) The modified asphalt self-adhesive layer obtained in step (1) and the interface modification component are fed into the automated coating device of the polymer sheet production line. After heating to 145°C, the coating is evenly applied to both sides of the surface of the polymer sheet layer. Finally, a protective film is applied, and the modified asphalt cold-laid waterproof membrane is obtained by winding and packaging.
[0015] In summary, the beneficial effects of the present invention are as follows:
[0016] The waterproof membrane of this invention is covered with a modified bitumen self-adhesive layer, which can achieve good adhesion to the building substrate through cold construction. The main body of the membrane is a polymer sheet. Before the modified bitumen self-adhesive layer is coated onto the polymer sheet, it is treated with an interface modification component. The interface modification component includes a silane coupling agent, polypropylene bundle cross-linked fibers, and glycidyl methacrylate. The three components work synergistically to improve the interfacial compatibility between the modified bitumen self-adhesive layer and the polymer sheet, while enhancing the membrane's tack, tensile strength, and peel strength, thus further improving the overall performance of the bitumen waterproof membrane. Detailed Implementation
[0017] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0018] I. Materials and Methods
[0019] Unless otherwise specified, the methods used in this embodiment are conventional methods known to those skilled in the art, and the reagents and materials used are commercially available products unless otherwise specified. Among them, the filler is preferably talc powder, the antioxidant is preferably antioxidant 168, and the filler is preferably calcium carbonate powder.
[0020] Example 1
[0021] This embodiment provides a method for preparing modified bitumen cold-laid waterproof membrane, the steps of which include:
[0022] (1) Preparation of modified asphalt self-adhesive layer: 50 parts of asphalt and 10 parts of naphthenic oil were added to the reactor and stirred. The mixture was heated to 145°C and dehydrated for 1 hour. Then, 16 parts of SIS were added and the temperature was raised to 170°C. The modification process was maintained for 3.5 hours. Subsequently, 4 parts of terpene resin were added and stirred at 170°C for 35 minutes. Finally, 20 parts of filler and 0.1 parts of antioxidant were added and stirred for 1 hour to obtain the modified asphalt self-adhesive layer. During the process, the temperature was controlled at 160°C-170°C.
[0023] (2) Preparation of polymer sheets: 25 parts of EVA resin, 30 parts of high-density polyethylene, 20 parts of low-density polyethylene, 15 parts of polyolefin elastomer, 1 part of antioxidant, and 9 parts of filler are put into the mixing hopper and mixed evenly. Then, the mixture is extruded by an extruder, calendered by three rollers, trimmed and cooled to obtain polymer sheets.
[0024] (3) The modified asphalt self-adhesive layer obtained in step (1) and the interface modification component are fed into the automated coating device of the polymer sheet production line. After heating to 145°C, it is evenly coated on both sides of the surface of the polymer sheet layer. Finally, a PET silicone oil film is covered, and the modified asphalt cold-laid waterproof membrane is obtained by winding and packaging.
[0025] The interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 2% silane coupling agent, 1% polypropylene bundle cross-linked fibers, and 2% glycidyl methacrylate.
[0026] Example 2
[0027] This embodiment provides a method for preparing a modified bitumen cold-laid waterproof membrane, the steps of which include:
[0028] (1) Preparation of modified asphalt self-adhesive layer: 50 parts of asphalt and 10 parts of naphthenic oil were added to the reactor and stirred. The mixture was heated to 145°C and dehydrated for 1 hour. Then, 16 parts of SIS were added and the temperature was raised to 170°C. The modification process was maintained for 3.5 hours. Subsequently, 4 parts of terpene resin were added and stirred at 170°C for 35 minutes. Finally, 20 parts of filler and 0.1 parts of antioxidant were added and stirred for 1 hour to obtain the modified asphalt self-adhesive layer. During the process, the temperature was controlled at 160°C-170°C.
[0029] (2) Preparation of polymer sheets: 25 parts of EVA resin, 30 parts of high-density polyethylene, 20 parts of low-density polyethylene, 15 parts of polyolefin elastomer, 1 part of antioxidant, and 9 parts of filler are put into the mixing hopper and mixed evenly. Then, the mixture is extruded by an extruder, calendered by three rollers, trimmed and cooled to obtain polymer sheets.
[0030] (3) The modified asphalt self-adhesive layer obtained in step (1) and the interface modification component are fed into the automated coating device of the polymer sheet production line. After heating to 145°C, it is evenly coated on both sides of the surface of the polymer sheet layer. Finally, a PET silicone oil film is covered, and the modified asphalt cold-laid waterproof membrane is obtained by winding and packaging.
[0031] The interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 2% silane coupling agent, 1% polypropylene bundle cross-linked fibers, and 2% glycidyl methacrylate.
[0032] Example 3
[0033] This embodiment provides a method for preparing a modified bitumen cold-laid waterproof membrane, the steps of which include:
[0034] (1) Preparation of modified asphalt self-adhesive layer: 40 parts of asphalt and 20 parts of naphthenic oil were added to the reactor and stirred. The mixture was heated to 145°C and dehydrated for 1 hour. Then, 16 parts of SIS were added and the temperature was raised to 170°C. The modification process was maintained for 3.5 hours. Subsequently, 4 parts of terpene resin were added and stirred at 170°C for 35 minutes. Finally, 10 parts of filler and 0.1 parts of antioxidant were added and stirred for 1 hour to obtain modified asphalt self-adhesive layer. During the process, the temperature was controlled at 160°C-170°C.
[0035] (2) Preparation of polymer sheets: 30 parts of EVA resin, 20 parts of high-density polyethylene, 20 parts of low-density polyethylene, 10 parts of polyolefin elastomer, 1 part of antioxidant, and 10 parts of filler are put into the mixing hopper and mixed evenly. Then, the mixture is extruded by an extruder, calendered by three rollers, trimmed and cooled to obtain polymer sheets.
[0036] (3) The modified asphalt self-adhesive layer obtained in step (1) and the interface modification component are fed into the automated coating device of the polymer sheet production line. After heating to 145°C, it is evenly coated on both sides of the surface of the polymer sheet layer. Finally, a PET silicone oil film is covered, and the modified asphalt cold-laid waterproof membrane is obtained by winding and packaging.
[0037] The interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 3% silane coupling agent, 2% polypropylene bundle cross-linked fibers, and 2% glycidyl methacrylate.
[0038] Example 4
[0039] The difference from Example 1 is that the interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 2% silane coupling agent, 2% polypropylene bundle crosslinked fibers, and 3% glycidyl methacrylate.
[0040] Example 5
[0041] The difference from Example 1 is that the interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 2% silane coupling agent, 2% polypropylene bundle crosslinked fibers, and 2% glycidyl methacrylate.
[0042] Example 6
[0043] The difference from Example 3 is that the interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 3% silane coupling agent, 2% polypropylene bundle crosslinked fibers, and 3% glycidyl methacrylate.
[0044] II. Verification Experiment
[0045] To investigate the effect of the composition of the interface modification components on the performance of waterproof membranes, waterproof membranes were prepared according to the formulations shown in Table 1.
[0046] Table 1. Component Formulation of Waterproof Membrane
[0047]
[0048]
[0049] 3. Testing and Analysis
[0050] The main performance of each group of membrane samples was tested in accordance with GB 23441-2009 "Self-adhesive polymer modified bitumen waterproof membrane". The standard requirements for Type I self-adhesive bitumen waterproof membrane of Class N are shown in Table 2.
[0051] The thermal aging performance of each group of roll material samples was determined according to the provisions of 5.16.1 in GB 23441-2009. The samples were placed horizontally in an oven at (70±2)℃ for 7 days±2 hours, and then placed at (23±2)℃ for 24 hours before sample preparation and performance testing.
[0052] Table 2. Standard Requirements for Type I Self-Adhesive Bituminous Waterproofing Membranes (Class N)
[0053]
[0054]
[0055] The test results are shown in Table 3.
[0056] Table 3. Statistical Table of Main Performance Test Results
[0057]
[0058]
[0059] As can be seen from Table 3, the main properties of the waterproof membranes obtained by the interface modification component disclosed in Examples 1-6 are generally better than those of Comparative Example 1. The difference between Example 3 and Example 6 is that the glycidyl methacrylate in Example 6 accounts for 3% of the weight of the modified bitumen self-adhesive layer, which is greater than 2% in Example 3. As can be seen from the table, the peel strength of the membrane in Example 6 is better than that in Example 3.
[0060] The difference between Example 5 and Example 1 is that the polypropylene bundle cross-linked fibers in Example 5 account for 2% of the weight of the modified asphalt self-adhesive layer, which is greater than 1% in Example 1. As can be seen from the table, the elongation at break and tensile strength of the roll material in Example 4 are better than those in Example 1.
[0061] Furthermore, as can be seen from test examples 1-3 and 6-8, the three-component approach of the interface modification components selected in this application—silane coupling agent, polypropylene bundle cross-linked fiber, and glycidyl methacrylate—results in better performance of the final waterproof membrane compared to single-component or two-component approaches.
[0062] Finally, in Experiment 4, polypropylene mesh fibers were used instead of polypropylene bundled cross-linked fibers. The results showed that the elongation at break and tensile strength of the roll material were improved compared to Experiment 1, but not as good as in Examples 1-3. It can be seen that polypropylene bundled cross-linked fibers have an advantage in improving the tensile strength of the roll material. In Experiment 5, maleic anhydride was used instead of glycidyl methacrylate. The elongation at break and tensile strength of the roll material were comparable to those in Example 1, but the tack and peel strength of the roll material were far inferior to those in Example 1. It can be seen that glycidyl methacrylate has an advantage in improving the tack and peel strength of the roll material.
[0063] III. Conclusion
[0064] The waterproof membrane of this invention is covered with a modified bitumen self-adhesive layer, which can achieve good adhesion to the building substrate through cold construction. The main body of the membrane is a polymer sheet. Before the modified bitumen self-adhesive layer is coated onto the polymer sheet, it is treated with an interface modification component. The interface modification component includes a silane coupling agent, polypropylene bundle cross-linked fibers, and glycidyl methacrylate. The three components work synergistically to improve the interfacial compatibility between the modified bitumen self-adhesive layer and the polymer sheet, while enhancing the membrane's tack, tensile strength, and peel strength, thus further improving the overall performance of the bitumen waterproof membrane.
[0065] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various improvements without departing from the concept of the present invention, and these improvements all fall within the scope of protection of the present invention.
Claims
1. A modified bitumen cold-laid waterproof membrane, characterized in that, It includes a polymer sheet, a modified bitumen self-adhesive layer coated on both sides of the polymer sheet, and a protective film attached to the surface of the modified bitumen self-adhesive layer. The modified asphalt self-adhesive layer is treated with interface modification components before being coated onto the polymer sheet; The modified asphalt self-adhesive layer, by weight, comprises 40-50 parts asphalt, 10-20 parts SIS, 2-6 parts terpene resin, 6-12 parts naphthenic oil, 0.1-0.5 parts antioxidant, and 10-20 parts filler. The polymer sheets, by weight, consist of 20-30 parts EVA resin, 20-30 parts high-density polyethylene, 15-25 parts low-density polyethylene, 10-15 parts polyolefin elastomer, 1-2 parts antioxidant, and 5-15 parts filler. The interface modification components, by percentage of the weight of the modified asphalt self-adhesive layer, include 2-3% silane coupling agent, 1-2% polypropylene bundle cross-linked fibers, and 2-3% glycidyl methacrylate.
2. The modified bitumen cold-laid waterproof membrane according to claim 1, characterized in that, The protective film is a PET silicone oil film.
3. A method for preparing a modified bitumen cold-laid waterproof membrane as described in any one of claims 1-2, characterized in that, The steps include: (1) Preparation of modified asphalt self-adhesive layer: Asphalt and naphthenic oil are added to the reactor according to the formula and stirred. The mixture is heated to 145°C and dehydrated for 1 hour. Then SIS is added and the temperature is raised to 170°C. The modification process is maintained for 3.5 hours. Then terpene resin is added and stirred at 170°C for 35 minutes. Finally, filler and antioxidant are added and stirred for 1 hour to obtain modified asphalt self-adhesive layer. During the process, the temperature is controlled at 160°C-170°C. (2) Preparation of polymer sheets: EVA resin, high-density polyethylene, low-density polyethylene, polyolefin elastomer, antioxidant and filler are added into the mixing hopper according to the formula and mixed evenly. Then, the mixture is extruded by an extruder, calendered by three rolls, trimmed and cooled to obtain polymer sheets. (3) The modified asphalt self-adhesive layer obtained in step (1) and the interface modification component are fed into the automated coating device of the polymer sheet production line. After heating to 145°C, it is uniformly coated on both sides of the surface of the polymer sheet layer. Finally, a protective film is covered, and the modified asphalt cold-laid waterproof membrane is obtained by winding and packaging.