A weather-resistant and anti-corrosive waterproof board and its preparation method

Abstract

The present invention relates to the technical field of waterproof building materials, and provides a weather-resistant and anti-corrosion waterproof board and a preparation method thereof. The waterproof board comprises, from top to bottom, a weather-resistant film, a polymer waterproof layer, an adhesive layer, a metal plate, and a corrosion-resistant film. The weather-resistant film comprises raw materials in the following parts by weight: 30-40 parts of high-density polyethylene, 30-50 parts of polyvinylidene fluoride, 10-20 parts of a first perfluoropolyether methacrylate, 10-20 parts of titanium dioxide, 1-2 parts of an antioxidant, 0.8-1.6 parts of a light stabilizer, and 2-4 parts of a dispersant. Through the above technical solution, the problem of poor weather resistance of waterproof boards in the related art is solved.

Description

Technical Field

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

[0002] A 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 boards are usually made of various materials, have good waterproof performance, and are easy to install, reducing construction costs and difficulties. With the rapid development of infrastructure construction, the application of waterproof boards is becoming more and more extensive, covering multiple fields such as construction, transportation, and water conservancy. Therefore, the application environment is also complex and changeable, so higher requirements are put forward for the performance of waterproof boards.

[0003] At present, the structure of waterproof boards usually consists of multiple layers of materials to provide good waterproof performance. However, when exposed to high external temperatures for a long time, it is easy to cause a decrease in the interlayer adhesion of the waterproof board, resulting in delamination between the layers of the waterproof board, thereby affecting the overall stability of the waterproof board and reducing the service life of the waterproof board. 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 present invention provides a weather-resistant and anti-corrosion waterproof board and a preparation method thereof, which solves the problem of poor weather resistance of waterproof boards in related technologies.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides a weather-resistant and anti-corrosion waterproof board, which from top to bottom is a weather-resistant film, a polymer waterproof layer, a bonding layer, a metal plate, and a corrosion-resistant film. The weather-resistant film comprises raw materials with the following parts by weight: 30-40 parts of high-density polyethylene, 30-50 parts of polyvinylidene fluoride, 10-20 parts of a first perfluoropolyether methacrylate, 10-20 parts of titanium dioxide, 1-2 parts of an antioxidant, 0.8-1.6 parts of a light stabilizer, and 2-4 parts of a dispersant;

[0007] The polymer waterproof layer comprises raw materials with the following parts by weight: 80-90 parts of a thermoplastic polyolefin resin, 20-30 parts of an ethylene-vinyl acetate copolymer, 5-10 parts of a lubricant, 30-40 parts of a filler, and 10-15 parts of a second perfluoropolyether methacrylate.

[0008] As a further technical solution, the molecular weights of the first perfluoropolyether methacrylate and the second perfluoropolyether methacrylate are independently 3000 or 6000.

[0009] 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.

[0010] In the present invention, by defining the molecular weight of the first perfluoropolyether methacrylate as 6000 and the molecular weight of the second perfluoropolyether methacrylate as 3000, the weather resistance and peel strength of the waterproof board are further improved.

[0011] As a further technical solution, the adhesive layer comprises raw materials in the following 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.

[0012] In the present invention, by adding mercapto-tetraethylene glycol-propionic acid to the adhesive layer, the compatibility of the components in the adhesive layer is promoted, the adhesion between the polymer waterproof layer, the adhesive layer and the metal plate is improved, and the peel strength of the waterproof board is further improved.

[0013] As a further technical solution, the corrosion-resistant film comprises raw materials in the following parts by weight: 40-50 parts of polyvinyl chloride, 20-30 parts of hydroxyl-terminated polydimethylsiloxane, and 10-15 parts of polyacrylic acid.

[0014] As a further technical solution, the dispersant is pentaerythritol ester.

[0015] As a further technical solution, the antioxidant comprises one or more of antioxidant 168, antioxidant 1010, and antioxidant B225.

[0016] As a further technical solution, the light stabilizer comprises one or two of Tinuvin XT847 and CYASORB B877.

[0017] As a further technical solution, the lubricant comprises one or more of stearic acid, calcium stearate, and polyethylene wax.

[0018] As a further technical solution, the filler comprises one or more of calcium carbonate, white carbon black, and talcum powder.

[0019] As a further technical solution, the metal plate is a steel plate.

[0020] As a further technical solution, the thicknesses of the weather-resistant film and the corrosion-resistant film are each independently 30-50 μm.

[0021] As a further technical solution, the thickness of the polymer waterproof layer is 1-2 mm; the thickness of the adhesive layer is 100-150 μm; and the thickness of the metal plate is 0.5-1 mm.

[0022] The present invention also provides a method for preparing a weather-resistant and anti-corrosive waterproof board, comprising the following steps:

[0023] S1. The raw materials of the weather-resistant film, the polymer waterproof layer, the adhesive layer, and the corrosion-resistant film are respectively mixed, melt-extruded, and calendered to obtain the weather-resistant film, the polymer waterproof layer, the adhesive layer, and the corrosion-resistant film;

[0024] S2. In the order of the weather-resistant film, the polymer waterproof layer, the adhesive layer, the metal plate, and the corrosion-resistant film from top to bottom, hot pressing and compounding are carried out to obtain the weather-resistant and anti-corrosive waterproof board.

[0025] The working principle and beneficial effects of the present invention are as follows:

[0026] 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 provided on the outer layer of the waterproof board, making the waterproof board have good corrosion resistance and weather resistance; by adding perfluoropolyether methacrylate to both the weather-resistant film and the polymer waterproof layer, the aging resistance of the weather-resistant film is enhanced, the adhesion between the weather-resistant film and the polymer waterproof layer is promoted, and the weather resistance of the waterproof board is further improved, solving the problem of poor weather resistance of the waterproof board. Specific embodiments

[0027] 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 a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of the present invention.

[0028] In the following embodiments and comparative examples:

[0029] 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; hydroxyl-terminated polydimethylsiloxane, CAS: 9016-00-6; mercapto-tetraethylene glycol-propionic acid, CAS: 749247-06-1; thermoplastic polyolefin resin, grade: BMV301; polyacrylic acid, product 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.

[0030] Example 1

[0031] A preparation method of a weather-resistant and corrosion-proof waterproof board, comprising the following steps:

[0032] S1. After mixing 30 parts of high-density polyethylene, 30 parts of polyvinylidene fluoride, 10 parts of the first perfluoropolyether methacrylate (molecular weight: 3000), 10 parts of titanium dioxide, 1 part of antioxidant 1010, 0.8 part of light stabilizer Tinuvin XT847, and 2 parts of pentaerythritol ester, melt-extrude and calender to obtain a weather-resistant film with a thickness of 30 μm;

[0033] S2. After mixing 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 the second perfluoropolyether methacrylate (molecular weight: 6000), melt-extrude and calender to obtain a high-molecular waterproof layer with a thickness of 1 mm;

[0034] S3. After mixing 45 parts of ethylene-vinyl acetate copolymer and 45 parts of polyacrylamide, melt-extrude and calender to obtain an adhesive layer with a thickness of 100 μm;

[0035] S4. After melting and extruding and calendering 40 parts of polyvinyl chloride, 20 parts of hydroxyl-terminated polydimethylsiloxane, and 10 parts of polyacrylic acid, obtain a corrosion-resistant film with a thickness of 30 μm;

[0036] S5. Perform hot pressing and lamination in the order of weather-resistant film, high-molecular waterproof layer, adhesive layer, steel plate, and corrosion-resistant film from top to bottom to obtain a weather-resistant and corrosion-proof waterproof board.

[0037] Example 2

[0038] A preparation method of a weather-resistant and corrosion-proof waterproof board, comprising the following steps:

[0039] S1. After mixing 35 parts of high-density polyethylene, 40 parts of polyvinylidene fluoride, 15 parts of the 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, melt-extrude and calender to obtain a weather-resistant film with a thickness of 40 μm;

[0040] S2. After mixing 85 parts of thermoplastic polyolefin resin, 25 parts of ethylene-vinyl acetate copolymer, 7 parts of calcium stearate, 35 parts of silica, and 12 parts of the second perfluoropolyether methacrylate (molecular weight: 6000), melt-extrude and calender to obtain a high-molecular waterproof layer with a thickness of 1.5 mm;

[0041] S3. After mixing 50 parts of ethylene-vinyl acetate copolymer and 30 parts of polyacrylamide, melt extrusion and calendering are carried out to obtain a bonding layer with a thickness of 120 μm;

[0042] S4. After mixing 45 parts of polyvinyl chloride, 25 parts of hydroxyl-terminated polydimethylsiloxane, and 12 parts of polyacrylic acid, melt extrusion and calendering are carried out to obtain a corrosion-resistant film with a thickness of 40 μm;

[0043] S5. In the order of weather-resistant film, polymer waterproof layer, bonding layer, steel plate, and corrosion-resistant film from top to bottom, hot pressing and compounding are carried out to obtain a weather-resistant and corrosion-resistant waterproof board.

[0044] Example 3

[0045] A preparation method of a weather-resistant and corrosion-resistant waterproof board includes the following steps:

[0046] S1. After mixing 40 parts of high-density polyethylene, 50 parts of polyvinylidene fluoride, 20 parts of the 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, melt extrusion and calendering are carried out to obtain a weather-resistant film with a thickness of 50 μm;

[0047] S2. After mixing 90 parts of thermoplastic polyolefin resin, 30 parts of ethylene-vinyl acetate copolymer, 10 parts of polyethylene wax, 40 parts of talcum powder, and 15 parts of the second perfluoropolyether methacrylate (molecular weight: 6000), melt extrusion and calendering are carried out to obtain a polymer waterproof layer with a thickness of 2 mm;

[0048] S3. After mixing 35 parts of ethylene-vinyl acetate copolymer and 40 parts of polyacrylamide, melt extrusion and calendering are carried out to obtain a bonding layer with a thickness of 150 μm;

[0049] S4. After mixing 50 parts of polyvinyl chloride, 30 parts of hydroxyl-terminated polydimethylsiloxane, and 15 parts of polyacrylic acid, melt extrusion and calendering are carried out to obtain a corrosion-resistant film with a thickness of 50 μm;

[0050] S5. In the order of weather-resistant film, polymer waterproof layer, bonding layer, steel plate, and corrosion-resistant film from top to bottom, hot pressing and compounding are carried out to obtain a weather-resistant and corrosion-resistant waterproof board.

[0051] Example 4

[0052] Compared with Example 1, this example is only different in that the first perfluoropolyether methacrylate (molecular weight: 3000) in the weather-resistant film is replaced with perfluoropolyether methacrylate with a molecular weight of 6000.

[0053] Example 5

[0054] This example is different from Example 1 only in that the second perfluoropolyether methacrylate (molecular weight: 6000) in the polymer waterproof layer is replaced with perfluoropolyether methacrylate with a molecular weight of 3000.

[0055] Example 6

[0056] This example is different from Example 1 only in that the first perfluoropolyether methacrylate (molecular weight: 3000) in the weather-resistant film is replaced with perfluoropolyether methacrylate with a molecular weight of 6000, and the second perfluoropolyether methacrylate (molecular weight: 6000) in the polymer waterproof layer is replaced with perfluoropolyether methacrylate with a molecular weight of 3000.

[0057] Example 7

[0058] This example is different from Example 6 only in 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 and then melt-extruded and calendered to obtain a bonding layer with a thickness of 100 μm.

[0059] Example 8

[0060] This example is different from Example 6 only in 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 and then melt-extruded and calendered to obtain a bonding layer with a thickness of 100 μm.

[0061] Example 9

[0062] This example is different from Example 6 only in 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 and then melt-extruded and calendered to obtain a bonding layer with a thickness of 100 μm.

[0063] Example 10

[0064] This example is different from Example 6 only in 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 and then melt-extruded and calendered to obtain a bonding layer with a thickness of 100 μm.

[0065] Comparative Example 1

[0066] This comparative example is different from Example 1 only in that the first perfluoropolyether methacrylate (molecular weight: 3000) is not added to the weather-resistant film.

[0067] Comparative Example 2

[0068] This comparative example is different from Example 1 only in that the second perfluoropolyether methacrylate (molecular weight: 6000) is not added to the polymer waterproof layer.

[0069] Comparative Example 3

[0070] This comparative example is different from Example 1 only in 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.

[0071] The weather-resistant films and polymer waterproof layers prepared in Example 1, Examples 4 to 6 and Comparative Example 3 were respectively subjected to a tensile test according to the test method in GB27789-2011 "Thermoplastic Polyolefin (TPO) Waterproof Coils", and at the same time a heat aging experiment (115°C × 672 h) was carried out, and 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.

[0072] Table 1 Performance test results of weather-resistant films and polymer waterproof layers

[0073]

[0074] Compared with Example 1, the perfluoropolyether methacrylate is not added to the weather-resistant film in Comparative Example 1, the perfluoropolyether methacrylate is not added to the polymer waterproof layer in Comparative Example 2, and the perfluoropolyether methacrylate is not added to both the weather-resistant film and 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 board in Comparative Examples 1 to 3 are lower than those in Example 1, indicating that when the perfluoropolyether methacrylate is added to both the weather-resistant film and the polymer waterproof layer, the tensile force and weather resistance of the waterproof board can be improved.

[0075] Compared with Example 1, the molecular weights of the perfluoropolyether methacrylate in the weather-resistant film and the polymer waterproof layer were 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 are 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.

[0076] The waterproof sheets 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 Standard for Building Materials and Home Furnishings of the People's Republic of China". At the same time, an aging experiment was carried out (according to Method A, Cycle 9 of GB / T16422.2-2014 "Plastics - Methods of Exposure to Laboratory Light Sources - Part 2: Xenon-Arc Lamp"), and the peel strength retention rate after aging was recorded. The peel strength retention rate = peel strength after aging / peel strength before aging × 100%. The test results are shown in Table 2.

[0077] Table 2 Test Results of Waterproof Sheet Performance

[0078]

[0079] Compared with Example 1, mercapto-tetraethylene glycol-propionic acid was added to the adhesive layer in Example 7. As a result, both the peel strength and the peel strength retention rate after thermal aging of the waterproof sheet in Example 7 were higher than those in Example 1, indicating that adding mercapto-tetraethylene glycol-propionic acid to the adhesive layer can further improve the peel strength and weather resistance of the waterproof sheet.

[0080] Compared with Example 7, the addition amount of mercapto-tetraethylene glycol-propionic acid was changed in Examples 8 to 10. As a result, both the peel strength and the peel strength retention rate after thermal aging of the waterproof sheet 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 sheet can be further improved.

[0081] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within 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; the molecular weights of the first perfluoropolyether methacrylate and the second perfluoropolyether methacrylate are each independently 3000 or 6000.

2. A weather-resistant and anti-corrosion waterproof board according to claim 1, characterized in that: The molecular weight of the first perfluoropolyether methacrylate is 6000, and the molecular weight of the second perfluoropolyether methacrylate is 3000.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. A method for preparing a weather-resistant and anti-corrosion waterproof board according to any one of claims 1 to 8, 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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