High-strength stainless steel waterproof coiled material and method for preparing same

Abstract

A high-strength stainless steel waterproof coiled material and a method for preparing same. The high-strength stainless steel waterproof coiled material sequentially comprises, from bottom to top, a stainless steel material, a first bonding layer, a waterproof layer, a second bonding layer, and an isolation film. The raw materials of the first bonding layer comprise the following components in parts by weight: 80-90 parts of butyl rubber, 10-30 parts of polypropylene, 20-30 parts of filler A, 12-18 parts of a tackifier, 0.2-0.5 part of a coupling agent, 8-12 parts of a softener, 1-2 parts of stannous chloride, 1-3 parts of a vulcanizing agent, and 2-3 parts of an accelerant. The tackifier is composed of polyurethane and o-ethoxyphenyl isocyanate. The first bonding layer and the second bonding layer have the same raw materials. The high-strength stainless steel waterproof coiled material solves the problems in existing stainless steel waterproof coiled materials that bonding and stripping strength are low, and bonding and stripping strength decline significantly after soaking in water.

Description

High-strength stainless steel waterproof coil and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of waterproof coiled materials, and in particular to a high-strength stainless steel waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproofing materials prevent the intrusion of rainwater, groundwater, industrial and residential water supply and drainage, corrosive liquids, and airborne moisture and vapor into buildings. Based on their form, waterproofing materials are classified into three main categories: 1. Waterproofing membranes; 2. 911 polyurethane waterproofing coatings; and 3. New polymer cement-based waterproofing materials. Waterproofing membranes are primarily used in construction projects such as roofs, exterior walls, and basements. The selection of waterproofing membranes is crucial in construction, as their quality determines the quality of construction and the lifespan of the building. Using substandard waterproofing materials can lead to roof leaks, seriously impacting people's lives.

[0003] In order to meet the requirements of high-strength waterproof membranes, stainless steel is used as the base material of waterproof membranes. However, the existing waterproof materials have low adhesion to stainless steel, and the adhesion decreases significantly after being immersed in water. As a result, the stainless steel waterproof membranes have low peel strength and the peel strength decreases significantly after being immersed in water.

[0004] Summary of the Invention

[0005] The present invention provides a high-strength stainless steel waterproof coil and a preparation method thereof, which solves the problem in the related art that the stainless steel waterproof coil has low bonding and peeling strength and a significant decrease in bonding and peeling strength after being immersed in water.

[0006] The technical solutions of the present invention are as follows:

[0007] The high-strength stainless steel waterproof membrane comprises, from bottom to top, stainless steel, a first bonding layer, a waterproof layer, a second bonding layer, and an isolation membrane. The raw materials of the first bonding layer include the following components in parts by weight: 80-90 parts of butyl rubber, 10-30 parts of polypropylene, 20-30 parts of filler A, 12-18 parts of tackifier, 0.2-0.5 part of coupling agent, 8-12 parts of softener, 1-2 parts of stannous chloride, 1-3 parts of vulcanizer, and 2-3 parts of accelerator; the tackifier is composed of polyurethane and o-ethoxyphenyl isocyanate; the raw materials of the first bonding layer and the second bonding layer are the same.

[0008] As a further technical solution, the mass ratio of the polyurethane to o-ethoxyphenyl isocyanate is 4:1-3.

[0009] As a further technical solution, the mass ratio of the polyurethane to o-ethoxyphenyl isocyanate is 2:1.

[0010] The present invention finds that when the mass ratio of polyurethane to o-ethoxyphenyl isocyanate is 2:1, the bonding peel strength and the bonding peel strength retention rate after immersion in water of the stainless steel waterproof membrane can be further improved.

[0011] As a further technical solution, the filler A includes one or more of calcium carbonate, talc, and white carbon black.

[0012] As a further technical solution, the accelerator includes one or more of accelerator TMTD, accelerator DM, and accelerator M.

[0013] As a further technical solution, the softener includes one or more of naphthenic oil and pine tar.

[0014] As a further technical solution, the waterproof layer includes the following components in parts by weight: polyvinyl chloride resin, vulcanizing agent B, filler B, plasticizer, antioxidant, and anti-aging agent.

[0015] As a further technical solution, the raw materials of the waterproof layer include the following components in parts by weight: 50-60 parts of polyvinyl chloride resin, 1-2 parts of vulcanizing agent B, 5-10 parts of filler B, 6-10 parts of plasticizer, 0.5-1 parts of antioxidant, and 0.2-0.4 parts of antioxidant.

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

[0017] As a further technical solution, the antioxidant includes one or more of antioxidant 1010 and antioxidant 1076.

[0018] As a further technical solution, the antioxidant includes one or more of antioxidant 4020, antioxidant 445, and antioxidant 3100.

[0019] As a further technical solution, the preparation method of the waterproof layer is: after melting and extruding the raw material components of the waterproof layer, a shaped sheet is obtained, and the shaped sheet is pulled, calendered, and cooled to obtain the waterproof layer.

[0020] As a further technical solution, the isolation film includes one of a PE film and a PVC film.

[0021] As a further technical solution, the preparation method of the first bonding layer is:

[0022] A1. Melt and mix butyl rubber, polypropylene, a softener, and stannous chloride to obtain a mixture A.

[0023] A2. Add the remaining components to mixture A, melt mix them evenly, and extrude them to obtain a bonding layer.

[0024] As a further technical solution, the preparation method of the second adhesive layer is the same as the preparation method of the first adhesive layer.

[0025] As a further technical solution, the melting temperature in S1 is 165-180°C.

[0026] The present invention also includes a method for preparing a high-strength stainless steel waterproof coil, comprising the following steps: hot pressing and molding the stainless steel material, the first adhesive layer, the waterproof layer, the second adhesive layer, and the isolation membrane in order from bottom to top to obtain the stainless steel waterproof coil.

[0027] As a further technical solution, the thickness of the waterproof layer in the stainless steel waterproof coil is 2-4 mm.

[0028] As a further technical solution, the thickness of the first adhesive layer in the stainless steel waterproof membrane is 0.3-0.5 mm.

[0029] As a further technical solution, the thickness of the second adhesive layer in the stainless steel waterproof membrane is 0.3-0.5 mm.

[0030] The working principle and beneficial effects of the present invention are:

[0031] 1. The stainless steel waterproof membrane of the present invention adds an adhesive layer between the stainless steel material and the waterproof layer, thereby improving the peel strength of the stainless steel waterproof membrane. A tackifier composed of polyurethane and o-ethoxyphenyl isocyanate is added to the adhesive layer. The addition of the tackifier not only improves the bonding and peeling strength of the stainless steel waterproof membrane, but also improves the bonding and peeling strength retention rate of the stainless steel waterproof membrane after immersion in water.

[0032] 2. In the present invention, by limiting the mass ratio of polyurethane to o-ethoxyphenyl isocyanate to 4:1-3, the bonding peel strength of the stainless steel waterproof membrane and the retention rate of the bonding peel strength after immersion in water can be further improved. DETAILED DESCRIPTION

[0033] 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 embodiments described 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 making any creative efforts are within the scope of protection of the present invention.

[0034] Example 1

[0035] The preparation method of the stainless steel waterproof coiled material comprises: hot pressing and molding the stainless steel material, the first bonding layer, the waterproof layer, the second bonding layer, and the isolation film in order from bottom to top to obtain the stainless steel waterproof coiled material;

[0036] Wherein, the preparation method of the bonding layer is:

[0037] A1. Stir 80 parts of butyl rubber, 10 parts of polypropylene, 8 parts of naphthenic oil, and 1 part of stannous chloride at 165° C. for 20 minutes to obtain a mixture A.

[0038] A2, to the mixture A, 12 parts of polyurethane, 6 parts of o-ethoxyisocyanate benzene, 0.2 parts of silane coupling agent KH-550, 1 part of sulfur, 20 parts of calcium carbonate, and 2 parts of accelerator DM were added, and the mixture was stirred for 15 minutes and mixed evenly. The material was extruded, and after pulling, calendering, and cooling, a first bonding layer with a thickness of 0.3 mm and a second bonding layer with a thickness of 0.3 mm were respectively obtained;

[0039] Among them, the preparation method of the waterproof layer:

[0040] 50 parts of polyvinyl chloride resin, 1 part of sulfur, 5 parts of white carbon black, 6 parts of dioctyl phthalate, 0.5 parts of antioxidant 1010, and 0.2 parts of antioxidant 4020 are mixed, added to an extruder, and melt-extruded at 140°C to obtain a shaped sheet; the shaped sheet layer is pulled, calendered, and cooled to obtain a 2 mm thick waterproof layer.

[0041] Example 2

[0042] The preparation method of the stainless steel waterproof coiled material comprises: hot pressing and molding the stainless steel material, the first bonding layer, the waterproof layer, the second bonding layer, and the isolation film in order from bottom to top to obtain the stainless steel waterproof coiled material;

[0043] Wherein, the preparation method of the bonding layer is:

[0044] A1. Stir 85 parts of butyl rubber, 20 parts of polypropylene, 10 parts of pine tar oil, and 1.5 parts of stannous chloride at 175° C. for 16 minutes to obtain a mixture A.

[0045] A2, to the mixture A, 12.8 parts of polyurethane, 3.2 parts of o-ethoxyisocyanate benzene, 0.4 parts of silane coupling agent KH-550, 2 parts of sulfur, 25 parts of white carbon black, and 3 parts of accelerator M were added, and the mixture was stirred for 16 minutes. After mixing evenly, the material was extruded, and after pulling, calendering, and cooling, a first bonding layer with a thickness of 0.4 mm and a second bonding layer with a thickness of 0.5 mm were obtained respectively;

[0046] Among them, the preparation method of the waterproof layer:

[0047] 55 parts of polyvinyl chloride resin, 1.5 parts of sulfur, 8 parts of calcium carbonate, 8 parts of dioctyl phthalate, 0.8 parts of antioxidant 1010 and 0.3 parts of antioxidant 4020 were mixed, added to an extruder, and melt-extruded at 140°C to obtain a formed sheet; the formed sheet layer was pulled, calendered and cooled to obtain a 3 mm thick waterproof layer.

[0048] Example 3

[0049] The preparation method of the stainless steel waterproof coiled material comprises: hot pressing and molding the stainless steel material, the first bonding layer, the waterproof layer, the second bonding layer, and the isolation film in order from bottom to top to obtain the stainless steel waterproof coiled material;

[0050] Wherein, the preparation method of the bonding layer is:

[0051] A1. Stir 90 parts of butyl rubber, 30 parts of polypropylene, 12 parts of pine tar oil, and 2 parts of stannous chloride at 180° C. for 15 minutes to obtain a mixture A.

[0052] A2, to the mixture A, 6.8 parts of polyurethane, 5.2 parts of o-ethoxyisocyanate benzene, 0.5 parts of silane coupling agent KH-550, 3 parts of sulfur, 30 parts of white carbon black, and 2.5 parts of accelerator TMTD were added, and the mixture was stirred for 20 minutes. After mixing evenly, the material was extruded, and after pulling, calendering, and cooling, a first bonding layer with a thickness of 0.5 mm and a second bonding layer with a thickness of 0.5 mm were obtained respectively;

[0053] Among them, the preparation method of the waterproof layer:

[0054] 60 parts of polyvinyl chloride resin, 2 parts of sulfur, 10 parts of talc, 10 parts of dioctyl phthalate, 1 part of antioxidant 1010, and 0.4 parts of antioxidant 4020 were mixed, added to an extruder, and melt-extruded at 140°C to obtain a shaped sheet; the shaped sheet layer was pulled, calendered, and cooled to obtain a 4 mm thick waterproof layer.

[0055] Example 4

[0056] Compared with Example 3, Example 4 is different in that 8 parts of polyurethane and 4 parts of o-ethoxybenzene isocyanate are used.

[0057] Example 5

[0058] Compared with Example 3, Example 5 is different in that 9.6 parts of polyurethane and 2.4 parts of o-ethoxybenzene isocyanate are used.

[0059] Comparative Example 1

[0060] Compared with Example 3, Comparative Example 1 added polyurethane and o-ethoxyphenyl isocyanate, and the rest was the same as Example 3.

[0061] Comparative Example 2

[0062] Compared with Example 3, Comparative Example 2 does not add o-ethoxybenzene isocyanate, and the other steps are the same as Example 3.

[0063] Comparative Example 3

[0064] Compared with Example 3, Comparative Example 3 does not add polyurethane, and the other steps are the same as Example 3.

[0065] Test example

[0066] The properties of the adhesive layers obtained in Examples 1-5 and Comparative Examples 1-3 were measured using the following method:

[0067] The initial peel strength and the peel strength after immersion in water (23°C, 168h) were tested with reference to the requirements and test methods in FS1 of GB / T18173.1-2012 "Polymer Waterproofing Membrane Part 1: Sheet Materials", and the peel strength retention rate after immersion in water was calculated.

[0068] Adhesion strength retention rate after immersion in water (100%) = (initial adhesion peel strength - initial adhesion peel strength after immersion in water) / initial adhesion peel strength × 100;

[0069] The measurement results are shown in Table 1.

[0070] Table 1 Performance test results of stainless steel waterproof membranes obtained in Examples 1-5 and Comparative Examples 1-3

[0071] Compared with Example 3, Comparative Example 1 does not add polyurethane and o-ethoxyisocyanate benzene, Comparative Example 2 does not add o-ethoxyisocyanate benzene, and Comparative Example 3 does not add polyurethane. As a result, the initial bonding peel strength and the bonding peel strength retention rate after immersion in water of the stainless steel waterproof membrane prepared in Comparative Examples 1-3 are lower than those in Example 1, indicating that the simultaneous addition of polyurethane and o-ethoxyisocyanate benzene can not only improve the initial bonding peel strength, but also improve the bonding peel strength retention rate after immersion in water.

[0072] Compared with Example 3, Examples 4-5 changed the mass ratio of polyurethane and o-ethoxyphenyl isocyanate. As a result, the initial bonding peel strength and water immersion retention rate of Example 4 were higher than those of Examples 3 and 5, indicating that when the mass ratio of polyurethane and o-ethoxyphenyl isocyanate is 2:1, the initial bonding peel strength and bonding peel strength retention rate after immersion of the stainless steel waterproof membrane can be further improved.

[0073] The above are only 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 principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. High-strength stainless steel waterproof coiled material, from bottom to top, stainless steel material, first bonding layer, waterproof layer, second bonding layer, isolation membrane, characterized in that: The raw materials of the first bonding layer include the following components in parts by weight: 80-90 parts of butyl rubber, 10-30 parts of polypropylene, 20-30 parts of filler A, 12-18 parts of tackifier, 0.2-0.5 parts of coupling agent, 8-12 parts of softener, 1-2 parts of stannous chloride, 1-3 parts of vulcanizer, and 2-3 parts of accelerator; the tackifier is composed of polyurethane and o-ethoxyphenyl isocyanate; the raw materials of the first bonding layer and the second bonding layer are the same.

2. The high-strength stainless steel waterproof coiled material according to claim 1, characterized in that: The mass ratio of the polyurethane to o-ethoxybenzene isocyanate is 4:1-3.

3. The high-strength stainless steel waterproof coiled material according to claim 1, characterized in that: The filler A includes one or more of calcium carbonate, talcum powder, and white carbon black.

4. The high-strength stainless steel waterproof coiled material according to claim 1, characterized in that: The accelerator includes one or more of accelerator TMTD, accelerator DM and accelerator M.

5. The high-strength stainless steel waterproof coiled material according to claim 1, characterized in that: The softening agent includes one or more of naphthenic oil and pine tar oil.

6. The high-strength stainless steel waterproof coiled material according to claim 1, characterized in that: The raw materials of the waterproof layer include the following components by weight: polyvinyl chloride resin, vulcanizing agent B, filler B, plasticizer, antioxidant, and anti-aging agent.

7. The high-strength stainless steel waterproof coiled material according to claim 1, characterized in that: The isolation film includes one of a PE film and a PVC film.

8. The high-strength stainless steel waterproof coiled material according to any one of claim 1, characterized in that: The preparation method of the first bonding layer is: A1, melting and mixing butyl rubber, polypropylene, a softener and stannous chloride to obtain a mixture; A2, adding the remaining other components to the mixture, melting and mixing evenly, and then extruding to obtain a bonding layer; The preparation method of the second adhesive layer is the same as the preparation method of the first adhesive layer.

9. The high-strength stainless steel waterproof coiled material according to claim 8, characterized in that: The melting temperature of A1 is 165-180°C.

10. The method for preparing a high-strength stainless steel waterproof coiled material according to any one of claims 1 to 9, characterized in that: The following steps are involved: The stainless steel material, the adhesive layer, the waterproof layer, the adhesive layer and the isolation film are hot pressed and formed in the order from bottom to top to obtain the stainless steel waterproof membrane.

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