Coating and rolling compounding process of waterproof roll

Abstract

The invention provides a coating and rolling composite process of a waterproof roll, which comprises the following steps: coating a polyurethane waterproof coating on the surface of a concrete base layer, and pasting a TPO (thermoplastic polyolefin) waterproof roll. The coating and rolling composite process of the exposed waterproof roll is adopted, a protective layer does not need to be laid, the service life of the exposed waterproof roll can be the same as that of an engineering entity, the waterproof requirement is met, the construction period can be remarkably shortened, and the cost can be remarkably reduced.

Description

Technical Field

[0001] The present application relates to the technical field of building waterproofing, and in particular to a coating and laminating process of a waterproofing coiled material. Background Art

[0002] Roof waterproofing is a critical link in modern urban construction, and has a long-term impact on the safety and use of building structures. Due to the characteristics of the environment in which the roofing project is located, once leakage occurs, it will have a major impact on the safety of people’s property. In addition, the source of leakage is difficult to determine during maintenance projects, and the overall cost of maintenance is high. At the same time, with the needs of the times, building waterproofing projects will face the challenges of large-scale construction, high quality standards and rapid progress requirements.

[0003] In the face of current market applications, it is necessary to explore new waterproofing technologies to improve construction efficiency and waterproofing quality. Traditional roof waterproofing designs often require laying a protective layer after construction, which not only increases the structural load-bearing capacity, but also increases project time and cost. Summary of the invention

[0004] The present application is made in view of the above-mentioned problems, and its purpose is to provide a coating and compounding process for waterproof membranes. The process adopts a coating and compounding process for exposed waterproof membranes, which does not require the laying of a protective layer and can achieve the same lifespan as the engineering entity. The process not only meets the waterproofing requirements, but also can significantly shorten the construction period and cost.

[0005] The present application provides a coating and laminating process for a waterproof coiled material, comprising the following steps:

[0006] Coat polyurethane waterproof coating on the surface of concrete base and cover it with TPO waterproof membrane.

[0007] According to one technical solution in the coating composite process technical solution of this application, at least the following beneficial effects are achieved:

[0008] In this application, by coating the surface of the concrete base

[0009] According to some embodiments of the present application, the polyurethane waterproof coating comprises component A and component B;

[0010] The mass ratio of the component A to the component B is 1:0.8-1.2.

[0011] According to some embodiments of the present application, the mass ratio of component A to component B is 1:1.

[0012] According to some embodiments of the present application, the component A includes at least one of a polyether polyol, an isocyanate, a plasticizer and an auxiliary agent.

[0013] According to some embodiments of the present application, the A component includes the following preparation raw materials by weight:

[0014] Polyether polyol 50%-75% and isocyanate 25%-40%.

[0015] According to some embodiments of the present application, the A component includes the following preparation raw materials by weight:

[0016] Polyether polyol 50%-75%, isocyanate 25%-40%, plasticizer 0%-10% and auxiliary agent 0%-0.3%.

[0017] According to some embodiments of the present application, the hydroxyl value of the polyether polyol in the component A is 50 mg KOH / g to 60 mg KOH / g.

[0018] According to some embodiments of the present application, the B component includes at least one of a polyether polyol, a plasticizer, a chain extender, a powder and an auxiliary agent.

[0019] According to some embodiments of the present application, the B component includes the following preparation raw materials by weight:

[0020] Polyether polyol 20%-35%, plasticizer 5%-20%, powder 5%-55% and auxiliary agent 0.1%-2.5%.

[0021] According to some embodiments of the present application, the hydroxyl value of the polyether polyol in the B component is 30 mg KOH / g to 40 mg KOH / g.

[0022] According to some embodiments of the present application, the plasticizer is chlorinated paraffin.

[0023] According to some embodiments of the present application, the B component includes the following preparation raw materials by weight:

[0024] Polyether polyol 20%-35%, plasticizer 5%-20%, chain extender 0%-15%, powder 5%-55% and auxiliary agent 0.1%-2.5%.

[0025] According to some embodiments of the present application, the B component includes the following preparation raw materials by weight:

[0026] Polyether polyol 20%-35%, plasticizer 5%-20%, chain extender 0%-15%, coloring powder 5%-10% and auxiliary agent 0.1%-0.5%.

[0027] According to some embodiments of the present application, the auxiliary agent is a wetting and dispersing agent.

[0028] According to some embodiments of the present application, the moisture content of the concrete base layer is below 9%.

[0029] According to some embodiments of the present application, the compressive strength of the concrete base layer is above 30 MPa.

[0030] According to some embodiments of the present application, the TPO has a water impermeability of more than 2 h at 0.3 MPa.

[0031] According to some embodiments of the present application, the TPO is an L-type thermoplastic polyolefin.

[0032] According to some embodiments of the present application, node strengthening processing is also included.

[0033] According to some embodiments of the present application, the node strengthening process includes the following steps:

[0034] The polyurethane waterproof coating, mesh cloth and polyurethane waterproof coating are arranged in sequence.

[0035] According to some embodiments of the present application, the mesh cloth is a polyester mesh cloth.

[0036] According to some embodiments of the present application, the polyurethane waterproof coating impregnates the mesh cloth.

[0037] According to some embodiments of the present application, the coating and laminating process comprises the following steps:

[0038] BZ1. Base treatment: The structural integrity and surface flatness of the concrete base must be ensured, the base must be thoroughly cleaned to remove all impurities, and the humidity requirements of the two-component polyurethane waterproof coating must be met to ensure the quality and effect of the overall waterproof construction;

[0039] BZ2. Base surface marking and positioning: Plan the laying direction reasonably according to the working surface conditions, mark the laying control line on the base according to the size of the coiled material, ensure that the coiled material can be laid straight and flat, and test lay on the base before construction to confirm that the control line is accurate;

[0040] BZ3. Coating preparation: prepare the two-component polyurethane waterproof coating for later use;

[0041] BZ4. Node reinforcement treatment: Strengthen the nodes of various parts of the roof according to the design requirements to ensure that there are no adverse phenomena in the waterproof layer at these parts. The various parts of the roof include key parts such as corners, roof pipes and downspouts;

[0042] BZ5. Coating and composite construction of TPO membrane: attention should be paid to the laying order of the membrane, and hot air welding construction method should be used to ensure that the membrane is flat and correctly aligned;

[0043] BZ6. Overlap treatment: For overlap treatment of coiled materials, the overlap width must be constructed according to the specifications, the overlap surface must be kept clean and compacted with a roller. At the same time, the short side overlap seams must be pasted and tightened with special butt tape to ensure firmness;

[0044] BZ7.Quality acceptance: After all roll materials are laid, check them.

[0045] The inspection includes inspection of overall surface quality, overlap quality, local node treatment, finishing treatment and other items. If any quality defects are found, they should be repaired immediately.

[0046] According to some embodiments of the present application, step BZ1 includes:

[0047] BZ101. Concrete base preparation: Use a concrete base that is calendered with slurry to ensure that there are no gaps or holes on the concrete surface. Once the concrete is found to be damaged, it must be repaired first to ensure the normal progress of subsequent processes;

[0048] BZ102. Base cleaning: clean the dust and debris on the surface of the base to ensure the base is clean. If water is found in the base, it needs to be cleaned;

[0049] BZ103. Construction requirements: The base surface for the two-component polyurethane waterproof coating must be dry, and the moisture content of the base must not exceed 9%. For concrete base construction, there is no need to wait for drying, and waterproofing construction can only be carried out after it has a certain strength.

[0050] According to some embodiments of the present application, the repair work in step BZ101 includes: removing debris and dust from the concrete surface, selecting suitable mortar or concrete repair agent to fill holes and gaps, and ensuring that the filling material is well combined with the original concrete, and after filling, leveling and compacting again to ensure that the repair area is smooth and consistent with the surrounding concrete surface, so as to achieve a good repair effect and ensure structural strength and appearance.

[0051] According to some embodiments of the present application, the cleaning work in step BZ102 is drainage and base layer drying work to ensure construction quality.

[0052] According to some embodiments of the present application, the requirements for reasonable planning and laying of the coiled material in step BZ2 include: determining the overall laying direction of the coiled material according to the shape of the base surface; starting from 300mm to 600mm away from the intersection of the plane and vertical surfaces around the base surface or one side of the corner, setting a lap control line in parallel to make the lap seam avoid the intersection of the plane and vertical surfaces around the corner; using the lap control line as the starting line, and drawing lines parallel to the outside in sequence.

[0053] According to some embodiments of the present application, in step BZ3, the coating is prepared according to a mass ratio of A:B=1:1 (mass ratio), and is used immediately after preparation to avoid material waste.

[0054] According to some embodiments of the present application, the node reinforcement treatment construction in step BZ4 adopts a one-cloth-two-coating method, and its practices and requirements are: first, apply a thin layer of waterproof coating in the set range; before the coating film dries to the surface, cut a polyester mesh cloth according to the width of the reinforcement layer, and spread it on the surface of the coating film. The polyester mesh cloth should be laid flat and the bottom should not be exposed; finally, apply another thin layer of waterproof coating on the surface of the polyester mesh cloth to allow the coating to fully penetrate the polyester mesh cloth.

[0055] The overlap width of the long side of the polyester mesh cloth shall not be less than 50mm, and that of the short side shall not be less than 70mm; the overlap seams of the short sides shall be staggered, and four-layer cross overlap is not allowed.

[0056] According to some embodiments of the present application, step BZ5 includes:

[0057] BZ501. Construction sequence of coating and coiling: After all the joint coating reinforcement layers are dry, the coating can be applied to the large surface and the coiled materials can be laid simultaneously. The construction must be carried out in accordance with the laying requirements;

[0058] BZ502. Construction method: The paint is applied by scraping method, and the coil is applied by cold bonding method. When laying the first coil, first determine the direction of the coil according to the position of the overlapping edge, spread the coil on the surface of the base to release the internal stress of the coil, and then locate and cut the coil according to the position of the elastic line or the overlapping control line according to the principle of short-side staggered overlap. The staggered length of the short sides of two adjacent coils should not be less than 500mm. After cutting, evenly roll the coil from both ends to the middle into a roll and keep it in place for laying;

[0059] BZ503. Construction requirements: When applying the paint by scraping, pour an appropriate amount of paint on the base layer, use a rubber scraper to scrape left and right and gradually push backwards. The front and back two coats of paint should intersect, and the width of the intersection should be no less than 50mm; the fiber backing of the high-density polyethylene sheet of the roll should face the base layer, and the smooth backing should be away from the base layer. At the same time, the thermoplastic polyolefin (TPO) waterproof roll needs to adopt the hot air welding construction method.

[0060] According to some embodiments of the present application, the construction in accordance with the construction requirements in step BZ501 is specifically as follows: the roof waterproofing should be constructed in the order of "low first, high later, far first, near later" to avoid excessive trampling or damage to the completed roof waterproofing layer.

[0061] According to some embodiments of the present application, step BZ6 includes:

[0062] BZ601. Overlap width: The overlap width of two adjacent coils in the long side direction should not be less than 60mm (the effective welding width should not be less than 25mm); the overlap distance in the short side direction should not be less than 500mm, and the overlap width of the coil should not be less than 150mm;

[0063] BZ602. Bonding and compaction: When hot-joining, use a pressure roller to compact and adhere the material firmly, remove the air in the overlapping edges, and repeat the above operation until the entire plane of the roll material is laid.

[0064] The beneficial effects of this application are as follows:

[0065] 1. This application uses a two-component polyurethane waterproof coating and an exposed L-type thermoplastic polyolefin (TPO) waterproof membrane. The waterproof effect of its coating and rolling composite process is the same as the life of the engineering entity, which significantly shortens the construction period and cost.

[0066] 2. This application reduces energy consumption inside the building, saves energy and reduces emissions: the light-colored TPO single-layer roofing system used on the roof is a cool roofing system. Its high solar reflectance index and retention rate enable the roll material to reflect a large amount of solar radiation, reduce heat conduction downward, reduce the internal temperature in hot summer, and reduce the energy consumption of refrigeration equipment, which is in line with the design concept of green buildings.

[0067] 3. The surface of the coiled material of the present application is easy to clean: the coiled material itself has an easy-to-clean layer, which has better scratch resistance, organic solvent resistance, gas barrier properties and lower water absorption and friction coefficient during use, and can also reduce the electrostatic dust adsorption effect on the surface; in the process of using organic solvents to clean surface pollutants, it is not easy to cause damage to the surface structure, and the pollutants are easier to wipe off.

[0068] 4. This application adopts "coating and roll compounding" construction to achieve full adhesion with the base layer, fundamentally eliminating the defect of water seepage from the roll material. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0070] Figure 1 Flowchart of this application.

[0071] Figure 2 This is the BZ1 flow chart of this application.

[0072] Figure 3 This is the BZ5 flow chart of this application.

[0073] Figure 4 This is the BZ6 flow chart of this application.

[0074] The purpose, features and advantages of this figure will be further described in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0075] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0076] Obviously, the following descriptions are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in the field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0077] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0078] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0079] Implementation:

[0080] Please refer to the attached Figure 1 ~Attached Figure 4 The present application provides a coating and laminating process for an exposed L-type thermoplastic polyolefin (TPO) waterproofing membrane for a roof, comprising the following steps:

[0081] BZ1. Base treatment: The structural integrity and surface flatness of the concrete base must be ensured, the base must be thoroughly cleaned to remove all impurities, and the humidity requirements of the two-component polyurethane waterproof coating must be met to ensure the quality and effect of the overall waterproof construction;

[0082] BZ101. Concrete base preparation: Use a concrete base that is calendered with slurry to ensure that there are no gaps or holes on the concrete surface. Once the concrete is found to be damaged, it must be repaired first to ensure the normal progress of subsequent processes;

[0083] BZ102. Base cleaning: clean the dust and debris on the surface of the base to ensure the base is clean. If water is found in the base, it needs to be cleaned;

[0084] BZ103. Construction requirements: The base surface for the two-component polyurethane waterproof coating must be dry, and the moisture content of the base must not exceed 9%. For concrete base construction, there is no need to wait for drying, and waterproofing construction can only be carried out after it has a certain strength.

[0085] BZ2. Base surface marking and positioning: Plan the laying direction reasonably according to the working surface conditions, mark the laying control line on the base according to the size of the coiled material, ensure that the coiled material can be laid straight and flat, and test lay on the base before construction to confirm that the control line is accurate;

[0086] BZ3. Coating preparation: Prepare the coating according to the product instructions of the two-component polyurethane waterproof coating;

[0087] BZ4. Node reinforcement treatment: Strengthen the nodes of various parts of the roof according to the design requirements to ensure that there are no adverse phenomena in the waterproof layer at these parts. The various parts of the roof include key parts such as corners, roof pipes and downspouts;

[0088] BZ5. Coating and composite construction of TPO membrane: attention should be paid to the laying order of the membrane, and hot air welding construction method should be used to ensure that the membrane is flat and correctly aligned;

[0089] BZ501. Construction sequence of coating and coiling: After all the joint coating reinforcement layers are dry, the coating can be applied to the large surface and the coiled materials can be laid simultaneously. The construction must be carried out in accordance with the laying requirements;

[0090] BZ502. Construction method: The paint is applied by scraping method, and the coil is applied by cold bonding method. When laying the first coil, first determine the direction of the coil according to the position of the overlapping edge, spread the coil on the surface of the base to release the internal stress of the coil, and then locate and cut the coil according to the position of the elastic line or the overlapping control line according to the principle of short-side staggered overlap. The staggered length of the short sides of two adjacent coils should not be less than 500mm. After cutting, evenly roll the coil from both ends to the middle into a roll and keep it in place for laying;

[0091] BZ503. Construction requirements: When applying the paint by scraping, pour an appropriate amount of paint on the base layer, use a rubber scraper to scrape left and right and gradually push backwards. The front and back two coats of paint should intersect, and the width of the intersection should be no less than 50mm; the fiber backing of the high-density polyethylene sheet of the roll should face the base layer, and the smooth backing should be away from the base layer. At the same time, the thermoplastic polyolefin (TPO) waterproof roll needs to adopt the hot air welding construction method.

[0092] BZ6. Overlap treatment: For overlap treatment of coiled materials, the overlap width must be constructed according to the specifications, the overlap surface must be kept clean and compacted with a roller. At the same time, the short side overlap seams must be pasted and tightened with special butt tape to ensure firmness;

[0093] BZ601. Overlap width: The overlap width of two adjacent coils in the long side direction should not be less than 60mm (the effective welding width should not be less than 25mm); the overlap distance in the short side direction should not be less than 500mm, and the overlap width of the coil should not be less than 150mm;

[0094] BZ602. Bonding and compaction: When hot-joining, use a pressure roller to compact and adhere the material firmly, remove the air in the overlapping edges, and repeat the above operation until the entire plane of the roll material is laid.

[0095] After laying:

[0096] The bonding strength between TPO waterproof membrane and polyurethane waterproof coating is ≥1.50MPa;

[0097] Seam peel strength ≥3.00N / mm;

[0098] Artificial climate accelerated aging test ≥ 3000h.

[0099] The performance parameters of the polyether polyol JQD-220G in component A are: moisture ≤ 0.05%, hydroxyl value 56±2 mgKOH / g. It was purchased from Nanjing Jinqi Chemical Group Co., Ltd.

[0100] The performance parameters of isocyanate MDI are: purity ≥ 99.6%. It was purchased from BASF.

[0101] The performance parameters of the polyether polyol JQN-330N in component B are: moisture ≤ 0.08%, hydroxyl value 32mg KOH / g~36mg KOH / g; purchased from Nanjing Jinqi Chemical Group Co., Ltd.

[0102] The performance parameters of plasticizer 52# chlorinated paraffin are: moisture ≤1000PPM, viscosity ≤5000 (25℃, CPS); purchased from Hengyang Shengya Chemical Technology Co., Ltd.

[0103] The performance parameters of the coloring powder titanium dioxide are: TiO2 content ≥ 90%, pH value of water suspension: 6.5-8.0, purchased from Hunan Zhuzhou Chemical Industry Group Co., Ltd.

[0104] The performance parameters of the wetting and dispersing agent are: viscosity 300-400 (3# rotor 12 r / min) (23°C, mPa·S), specific gravity 1.0-1.1 (20°C, g / ml), purchased from Suzhou Feite Brothers New Material Technology Co., Ltd.

[0105] Example 1

[0106] This embodiment is a coating and laminating process of a waterproof coiled material, comprising the following steps:

[0107] A 2.0 mm thick polyurethane waterproof coating is applied on the surface of the concrete base (with a moisture content of 8% and a strength of 35 MPa), and then a TPO waterproof membrane is pasted on it.

[0108] The polyurethane waterproof coating consists of component A and component B, and the mass ratio of component A to component B is 1:1.

[0109] Component A of the polyurethane waterproof coating is composed of the following raw materials by weight:

[0110] Polyether polyol 75% and isocyanate 25%.

[0111] Component B of the polyurethane waterproof coating is composed of the following raw materials by weight:

[0112] Polyether polyol 35%, plasticizer 20%, coloring powder 44.5% and auxiliary agent (wetting and dispersing agent) 0.5%.

[0113] TPO waterproof membrane products comply with the Class L requirements of GB 27789-2011 "Thermoplastic Polyolefin (TPO) Waterproof Membrane", see Table 1:

[0114] Table 1

[0115]

[0116]

[0117] In this embodiment, the bonding strength between the TPO waterproof membrane and the polyurethane waterproof coating is: 2.00 MPa;

[0118] Seam peel strength: 3.86N / mm;

[0119] Artificial climate accelerated aging test: 3000h.

[0120] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A coating and laminating process for waterproof coiled material, characterized in that: The following steps are involved: Coat polyurethane waterproof coating on the surface of concrete base and cover it with TPO waterproof membrane.

2. The composite process according to claim 1, characterized in that: The polyurethane waterproof coating comprises component A and component B; The mass ratio of the component A to the component B is 1:0.8-1.

2.

3. The composite process according to claim 2, characterized in that: The component A comprises at least one of polyether polyol, isocyanate, plasticizer and auxiliary agent.

4. The composite process according to claim 2, characterized in that: The B component includes at least one of polyether polyol, plasticizer, chain extender, powder and auxiliary agent.

5. The composite process according to claim 1, characterized in that: The moisture content of the concrete base is below 9%.

6. The composite process according to claim 1, characterized in that: The compressive strength of the concrete base is above 30 MPa.

7. The composite process according to claim 1, characterized in that: The TPO has a water impermeability of more than 2 hours at 0.3 MPa.

8. The composite process according to claim 1, characterized in that: It also includes node enhancement processing; And / or, the node strengthening process comprises the following steps: The polyurethane waterproof coating, mesh cloth and polyurethane waterproof coating are arranged in sequence.

9. The composite process according to claim 8, characterized in that: The mesh cloth is a polyester mesh cloth.

10. The composite process according to claim 8, characterized in that: The polyurethane waterproof coating infiltrates the mesh cloth.

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