Weather-resistant and corrosion-resistant waterproof board and preparation method thereof

Abstract

The invention relates to the technical field of waterproof building materials, and provides a weather-proof corrosion-resistant waterproof board and a preparation method thereof.The waterproof board sequentially comprises a weather-proof film, a macromolecule waterproof layer, a bonding layer, a metal plate and a corrosion-resistant film from top to bottom; the weather-proof film is prepared from the following raw materials in parts by weight: 30 to 40 parts of high-density polyethylene, 30 to 50 parts of polyvinylidene fluoride, 10 to 20 parts of first perfluoropolyether methacrylate, 10 to 20 parts of titanium dioxide, 1 to 2 parts of an antioxidant, 0.8 to 1.6 parts of a light stabilizer and 2 to 4 parts of a dispersing agent. According to the technical scheme, the problem of poor weather resistance of the waterproof plate in the related technology is solved.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof building materials, and in particular to a weather-resistant and anti-corrosion waterproof board and a preparation method thereof. Background Art

[0002] Waterproof board is a material widely used in construction and civil engineering, mainly used to prevent water penetration and protect buildings and infrastructure from water damage. Waterproof board is usually made of a variety of materials, has good waterproof performance, and is easy to install, reducing construction costs and difficulty. With the rapid development of infrastructure construction, the application of waterproof board is becoming more and more extensive, covering many fields such as construction, transportation, water conservancy, etc. Therefore, its application environment is also complex and changeable, so higher requirements are placed on the performance of waterproof board.

[0003] At present, the structure of waterproof boards is usually composed of multiple layers of materials to provide good waterproof performance. However, long-term exposure to high external temperatures can easily lead to a decrease in the bonding strength between the layers of the waterproof boards, causing peeling between the layers of the waterproof boards, thereby affecting the overall stability of the waterproof boards and reducing the service life of the waterproof boards. Therefore, preparing a waterproof board with good weather resistance is a problem that needs to be solved at present. Summary of the invention

[0004] The invention provides a weather-resistant and anti-corrosion waterproof board and a preparation method thereof, which solves the problem of poor weather resistance of the waterproof board in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a weather-resistant and anti-corrosion waterproof board, which comprises a weather-resistant film, a polymer waterproof layer, a bonding layer, a metal plate, and a corrosion-resistant film from top to bottom. The weather-resistant film comprises the following raw materials in parts by weight: 30 to 40 parts of high-density polyethylene, 30 to 50 parts of polyvinylidene fluoride, 10 to 20 parts of a first perfluoropolyether methacrylate, 10 to 20 parts of titanium dioxide, 1 to 2 parts of an antioxidant, 0.8 to 1.6 parts of a light stabilizer, and 2 to 4 parts of a dispersant; The polymer waterproof layer comprises the following raw materials in parts by weight: 80-90 parts of thermoplastic polyolefin resin, 20-30 parts of ethylene-vinyl acetate copolymer, 5-10 parts of lubricant, 30-40 parts of filler, and 10-15 parts of second perfluoropolyether methacrylate.

[0006] As a further technical solution, the molecular weights of the first perfluoropolyether methacrylate and the second perfluoropolyether methacrylate are independently 3000 or 6000.

[0007] As a further technical solution, the molecular weight of the first perfluoropolyether methacrylate is 6000, and the molecular weight of the second perfluoropolyether methacrylate is 3000.

[0008] In the present invention, by limiting the molecular weight of the first perfluoropolyether methacrylate to 6000 and the molecular weight of the second perfluoropolyether methacrylate to 3000, the weather resistance and peel strength of the waterproof sheet are further improved.

[0009] As a further technical solution, the adhesive layer comprises the following raw materials in parts by weight: 35-50 parts of ethylene-vinyl acetate copolymer, 30-45 parts of polyacrylamide, and 10-15 parts of mercapto-tetraethylene glycol-propionic acid.

[0010] In the present invention, by adding mercapto-tetraethylene glycol-propionic acid into the bonding layer, the compatibility of the components in the bonding layer is promoted, the bonding between the polymer waterproof layer, the bonding layer and the metal plate is improved, and the peel strength of the waterproof board is further improved.

[0011] As a further technical solution, the corrosion-resistant film comprises the following raw materials in parts by weight: 40 to 50 parts of polyvinyl chloride, 20 to 30 parts of terminal hydroxyl polydimethylsiloxane, and 10 to 15 parts of polyacrylic acid.

[0012] As a further technical solution, the dispersant is pentaerythritol ester.

[0013] As a further technical solution, the antioxidant includes one or more of antioxidant 168, antioxidant 1010, and antioxidant B225.

[0014] As a further technical solution, the light stabilizer includes one or two of Tinuvin XT847 and CYASORBB877.

[0015] As a further technical solution, the lubricant includes one or more of stearic acid, calcium stearate, and polyethylene wax.

[0016] As a further technical solution, the filler includes one or more of calcium carbonate, white carbon black, and talcum powder.

[0017] As a further technical solution, the metal plate is a steel plate.

[0018] As a further technical solution, the thickness of the weather-resistant film and the corrosion-resistant film is independently 30-50 μm.

[0019] As a further technical solution, the thickness of the polymer waterproof layer is 1-2 mm; the thickness of the bonding layer is 100-150 μm; and the thickness of the metal plate is 0.5-1 mm.

[0020] The present invention also provides a method for preparing a weather-resistant and anti-corrosion waterproof board, comprising the following steps: S1. The raw materials of the weather-resistant film, the polymer waterproof layer, the bonding layer and the corrosion-resistant film are mixed, melt-extruded and calendered to obtain the weather-resistant film, the polymer waterproof layer, the bonding layer and the corrosion-resistant film; S2. Perform hot pressing and compounding in the order of weather-resistant film, polymer waterproof layer, bonding layer, metal plate and corrosion-resistant film from top to bottom to obtain a weather-resistant and corrosion-resistant waterproof board. The working principle and beneficial effects of the present invention are: In the present invention, the waterproof board is composed of a weather-resistant film, a polymer waterproof layer, an adhesive layer, a metal plate, and a corrosion-resistant film. The multi-layer composite structure enables the waterproof board to have good waterproof performance, and the weather-resistant film and the corrosion-resistant film are arranged on the outer layer of the waterproof board, so that the waterproof board has good corrosion resistance and corrosion resistance; by adding perfluoropolyether methacrylate to the weather-resistant film and the polymer waterproof layer at the same time, the aging resistance of the weather-resistant film is enhanced, the adhesion between the weather-resistant film and the polymer waterproof layer is promoted, the weather resistance of the waterproof board is further improved, and the problem of poor weather resistance of the waterproof board is solved. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the following embodiments and comparative examples: High-density polyethylene, model: TR571-H; polyvinylidene fluoride, model: DY-7; perfluoropolyether methacrylate, molecular weight: 3000 / 6000; ethylene-vinyl acetate copolymer, model: HH5110DH7W3L, purchased from Suzhou Yitianli Plastic Co., Ltd.; polyacrylamide, model: BIBO-APAM; polyvinyl chloride, model: DG-1000K; terminal hydroxyl polydimethylsiloxane, CAS: 9016-00-6; mercapto-tetraethylene glycol-propionic acid, CAS: 749247-06-1; thermoplastic polyolefin resin, brand: BMV301; polyacrylic acid, item number: DR-001, appearance: water white, effective substance content: 50%, purchased from Zibo Dongrun Chemical Technology Co., Ltd.; polyethylene wax, model: MR-162, purchased from Dongguan Dingxin Plastic Raw Materials Co., Ltd.

[0023] Example 1 A method for preparing a weather-resistant and anti-corrosion waterproof board comprises the following steps: S1, 30 parts of high-density polyethylene, 30 parts of polyvinylidene fluoride, 10 parts of a first perfluoropolyether methacrylate (molecular weight: 3000), 10 parts of titanium dioxide, 1 part of antioxidant 1010, 0.8 parts of light stabilizer Tinuvin XT847, and 2 parts of pentaerythritol ester are mixed, and then melt-extruded and calendered to obtain a weather-resistant film with a thickness of 30 μm; S2, 80 parts of thermoplastic polyolefin resin, 20 parts of ethylene-vinyl acetate copolymer, 5 parts of stearic acid, 30 parts of calcium carbonate, and 10 parts of a second perfluoropolyether methacrylate (molecular weight: 6000) are mixed, and then melt-extruded and calendered to obtain a polymer waterproof layer with a thickness of 1 mm; S3, mixing 45 parts of ethylene-vinyl acetate copolymer and 45 parts of polyacrylamide, and then melt-extruding and calendering to obtain a bonding layer with a thickness of 100 μm; S4, melt-extrude and calender 40 parts of polyvinyl chloride, 20 parts of terminal hydroxyl polydimethylsiloxane, and 10 parts of polyacrylic acid to obtain a corrosion-resistant film with a thickness of 30 μm; S5. Perform hot pressing and compounding in the order of weather-resistant film, polymer waterproof layer, bonding layer, steel plate and corrosion-resistant film from top to bottom to obtain a weather-resistant and corrosion-resistant waterproof board.

[0024] Example 2 A method for preparing a weather-resistant and anti-corrosion waterproof board comprises the following steps: S1, 35 parts of high-density polyethylene, 40 parts of polyvinylidene fluoride, 15 parts of a first perfluoropolyether methacrylate (molecular weight: 3000), 15 parts of titanium dioxide, 1 part of antioxidant 168, 1.2 parts of light stabilizer Tinuvin XT847, and 3 parts of pentaerythritol ester were mixed, and then melt-extruded and calendered to obtain a weather-resistant film with a thickness of 40 μm; S2, 85 parts of thermoplastic polyolefin resin, 25 parts of ethylene-vinyl acetate copolymer, 7 parts of calcium stearate, 35 parts of white carbon black, and 12 parts of a second perfluoropolyether methacrylate (molecular weight: 6000) were mixed, and then melt-extruded and calendered to obtain a polymer waterproof layer with a thickness of 1.5 mm; S3, mixing 50 parts of ethylene-vinyl acetate copolymer and 30 parts of polyacrylamide, and then melt-extruding and calendering to obtain a bonding layer with a thickness of 120 μm; S4, melt-extrude and calender 45 parts of polyvinyl chloride, 25 parts of terminal hydroxyl polydimethylsiloxane, and 12 parts of polyacrylic acid to obtain a corrosion-resistant film with a thickness of 40 μm; S5. Perform hot pressing and compounding in the order of weather-resistant film, polymer waterproof layer, bonding layer, steel plate and corrosion-resistant film from top to bottom to obtain a weather-resistant and corrosion-resistant waterproof board.

[0025] Example 3 A method for preparing a weather-resistant and anti-corrosion waterproof board comprises the following steps: S1, 40 parts of high-density polyethylene, 50 parts of polyvinylidene fluoride, 20 parts of a first perfluoropolyether methacrylate (molecular weight: 3000), 20 parts of titanium dioxide, 2 parts of antioxidant B225, 1.6 parts of light stabilizer CYASORBB877, and 4 parts of pentaerythritol ester were mixed, and then melt-extruded and calendered to obtain a weather-resistant film with a thickness of 50 μm; S2, 90 parts of thermoplastic polyolefin resin, 30 parts of ethylene-vinyl acetate copolymer, 10 parts of polyethylene wax, 40 parts of talc, and 15 parts of a second perfluoropolyether methacrylate (molecular weight: 6000) are mixed, and then melt-extruded and calendered to obtain a polymer waterproof layer with a thickness of 2 mm; S3, mixing 35 parts of ethylene-vinyl acetate copolymer and 40 parts of polyacrylamide, and then melt-extruding and calendering to obtain a bonding layer with a thickness of 150 μm; S4, melt-extrude and calender 50 parts of polyvinyl chloride, 30 parts of terminal hydroxyl polydimethylsiloxane, and 15 parts of polyacrylic acid to obtain a corrosion-resistant film with a thickness of 50 μm; S5. Perform hot pressing and compounding in the order of weather-resistant film, polymer waterproof layer, bonding layer, steel plate and corrosion-resistant film from top to bottom to obtain a weather-resistant and corrosion-resistant waterproof board.

[0026] Example 4 The only difference between this embodiment and Embodiment 1 is that the first perfluoropolyether methacrylate (molecular weight: 3000) in the weather-resistant film is replaced by a perfluoropolyether methacrylate with a molecular weight of 6000.

[0027] Example 5 The only difference between this embodiment and embodiment 1 is that the second perfluoropolyether methacrylate (molecular weight: 6000) in the polymer waterproof layer is replaced by perfluoropolyether methacrylate with a molecular weight of 3000.

[0028] Example 6 The only difference between this embodiment and Embodiment 1 is that the first perfluoropolyether methacrylate (molecular weight: 3000) in the weather-resistant film is replaced by a perfluoropolyether methacrylate with a molecular weight of 6000, and the second perfluoropolyether methacrylate (molecular weight: 6000) in the polymer waterproof layer is replaced by a perfluoropolyether methacrylate with a molecular weight of 3000.

[0029] Example 7 The only difference between this embodiment and embodiment 6 is that in step S3, 45 parts of ethylene-vinyl acetate copolymer, 45 parts of polyacrylamide, and 20 parts of mercapto-tetraethylene glycol-propionic acid are mixed, melt-extruded, and calendered to obtain a bonding layer with a thickness of 100 μm.

[0030] Example 8 The only difference between this embodiment and embodiment 6 is that in step S3, 45 parts of ethylene-vinyl acetate copolymer, 45 parts of polyacrylamide, and 10 parts of mercapto-tetraethylene glycol-propionic acid are mixed, melt-extruded, and calendered to obtain a bonding layer with a thickness of 100 μm.

[0031] Example 9 The only difference between this embodiment and embodiment 6 is that in step S3, 45 parts of ethylene-vinyl acetate copolymer, 45 parts of polyacrylamide, and 15 parts of mercapto-tetraethylene glycol-propionic acid are mixed, melt-extruded, and calendered to obtain a bonding layer with a thickness of 100 μm.

[0032] Example 10 The only difference between this embodiment and embodiment 6 is that in step S3, 45 parts of ethylene-vinyl acetate copolymer, 45 parts of polyacrylamide, and 8 parts of mercapto-tetraethylene glycol-propionic acid are mixed, melt-extruded, and calendered to obtain a bonding layer with a thickness of 100 μm.

[0033] Comparative Example 1 The only difference between this comparative example and Example 1 is that the first perfluoropolyether methacrylate (molecular weight: 3000) is not added to the weather-resistant film.

[0034] Comparative Example 2 The only difference between this comparative example and Example 1 is that the second perfluoropolyether methacrylate (molecular weight: 6000) is not added to the polymer waterproof layer.

[0035] Comparative Example 3 The only difference between this comparative example and Example 1 is that the first perfluoropolyether methacrylate (molecular weight: 3000) is not added to the weather-resistant film, and the second perfluoropolyether methacrylate (molecular weight: 6000) is not added to the polymer waterproof layer.

[0036] The weather-resistant films and polymer waterproof layers prepared in Example 1, Examples 4 to 6 and Comparative Example 3 were subjected to tensile tests according to the test method in GB27789-2011 "Thermoplastic Polyolefin (TPO) Waterproof Membrane", and a heat aging test (115°C × 672h) was performed at the same time. The maximum tensile force after heat aging was recorded, and the maximum tensile force retention rate was calculated. The test results are shown in Table 1.

[0037] Table 1 Performance test results of weather-resistant membrane and polymer waterproof layer

[0038] Compared with Example 1, no perfluoropolyether methacrylate is added to the weather-resistant membrane in Comparative Example 1, no perfluoropolyether methacrylate is added to the polymer waterproof layer in Comparative Example 2, and no perfluoropolyether methacrylate is added to either the weather-resistant membrane or the polymer waterproof layer in Comparative Example 3. As a result, the maximum tensile force and the maximum tensile force retention rate after heat aging of the waterproof boards in Comparative Examples 1 to 3 are lower than those in Example 1, indicating that when fluoropolyether methacrylate is added to both the weather-resistant membrane and the polymer waterproof layer, the tensile force and weather resistance of the waterproof board can be improved.

[0039] Compared with Example 1, the molecular weight of perfluoropolyether methacrylate in the weather-resistant film and the polymer waterproof layer was changed in Examples 4 to 6. As a result, the maximum tensile force and the maximum tensile force retention rate after heat aging of the waterproof board in Example 6 were higher than those in Examples 1, 4, and 5, indicating that when the molecular weight of the perfluoropolyether methacrylate in the weather-resistant film is 6000 and the molecular weight of the perfluoropolyether methacrylate in the polymer waterproof layer is 3000, the tensile force and weather resistance of the waterproof board can be further improved.

[0040] The waterproof boards prepared in Examples 1 to 3 and Examples 7 to 10 were respectively tested for peel strength according to the method specified in T / CBMCA 017-2020 "Professional Standards for Building Materials and Home Furnishings of the People's Republic of China", and an aging experiment was carried out at the same time (according to Method A No. 9 cycle of GB / T16422.2-2014 "Plastic Laboratory Light Source Exposure Test Method Part 2: Xenon Arc Lamp"), and the peel strength retention rate after aging was recorded, peel strength retention rate = peel strength after aging / peel strength before aging × 100%. The test results are shown in Table 2.

[0041] Table 2 Waterproof board performance test results

[0042] Compared with Example 1, mercapto-tetraethylene glycol-propionic acid was added to the bonding layer in Example 7. As a result, the peel strength and the peel strength retention rate after heat aging of the waterproof board in Example 7 were higher than those in Example 1, indicating that the addition of mercapto-tetraethylene glycol-propionic acid to the bonding layer can further improve the peel strength and weather resistance of the waterproof board.

[0043] Compared with Example 7, the addition amount of mercapto-tetraethylene glycol-propionic acid was changed in Examples 8 to 10. As a result, the peel strength and peel strength retention rate after heat aging of the waterproof board in Examples 8 to 9 were higher than those in Examples 7 and 10, indicating that when the addition amount of mercapto-tetraethylene glycol-propionic acid is 10 to 15 parts, the peel strength and weather resistance of the waterproof board can be further improved.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A weather-resistant and anti-corrosion waterproof board, characterized in that: From top to bottom, they are weather-resistant film, polymer waterproof layer, adhesive layer, metal plate, and corrosion-resistant film. The weather-resistant film includes the following raw materials in parts by weight: 30-40 parts of high-density polyethylene, 30-50 parts of polyvinylidene fluoride, 10-20 parts of first perfluoropolyether methacrylate, 10-20 parts of titanium dioxide, 1-2 parts of antioxidant, 0.8-1.6 parts of light stabilizer, and 2-4 parts of dispersant; The polymer waterproof layer comprises the following raw materials in parts by weight: 80-90 parts of thermoplastic polyolefin resin, 20-30 parts of ethylene-vinyl acetate copolymer, 1-2 parts of lubricant, 30-40 parts of filler, and 10-15 parts of second perfluoropolyether methacrylate.

2. A weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The molecular weights of the first perfluoropolyether methacrylate and the second perfluoropolyether methacrylate are each independently 3,000 or 6,000.

3. A weather-resistant and anti-corrosion waterproof board according to claim 2, characterized in that: The molecular weight of the first perfluoropolyether methacrylate is 6000, and the molecular weight of the second perfluoropolyether methacrylate is 3000.

4. The weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The adhesive layer comprises the following raw materials in parts by weight: 35-50 parts of ethylene-vinyl acetate copolymer, 30-45 parts of polyacrylamide, and 10-15 parts of mercapto-tetraethylene glycol-propionic acid.

5. The weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The corrosion-resistant film comprises the following raw materials in parts by weight: 40-50 parts of polyvinyl chloride, 20-30 parts of terminal hydroxyl polydimethylsiloxane, and 10-15 parts of polyacrylic acid.

6. The weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The antioxidant includes one or more of antioxidant 168, antioxidant 1010, and antioxidant B225.

7. The weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The light stabilizer includes one or two of Tinuvin XT847 and CYASORBB877.

8. The weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The lubricant includes one or more of stearic acid, calcium stearate, and polyethylene wax.

9. The weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The filler includes one or more of calcium carbonate, white carbon black and talc.

10. A method for preparing a weather-resistant and anti-corrosion waterproof board according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The raw materials of the weather-resistant film, the polymer waterproof layer, the bonding layer, and the corrosion-resistant film are mixed, melt-extruded, and calendered to obtain the weather-resistant film, the polymer waterproof layer, the bonding layer, and the corrosion-resistant film; S2. Perform hot pressing and compounding in the order of weather-resistant film, polymer waterproof layer, bonding layer, metal plate and corrosion-resistant film from top to bottom to obtain a weather-resistant and corrosion-resistant waterproof board.

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