Film-coated metal plate and roof

Abstract

The invention provides a film-coated metal plate and a roof. The film-coated metal plate comprises a polymer waterproof layer, the polymer waterproof layer comprises a glass fiber composite polyvinyl chloride layer and a self-cleaning material, and the self-cleaning material is located on one side of an exposed surface of the glass fiber composite polyvinyl chloride layer; the bonding layer is positioned on one side of the macromolecular waterproof layer; the metal layer is located on the main body layer on the side, away from the macromolecule waterproof layer, of the bonding layer, the glass fiber composite polyvinyl chloride layer comprises a plurality of polyvinyl chloride sub-layers, a glass fiber sub-layer is arranged between every two adjacent polyvinyl chloride sub-layers in a spaced mode, and the exposed face is formed by the polyvinyl chloride sub-layers.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical materials, in particular to a coated metal sheet and a roof. BACKGROUND

[0002] PVC waterproofing membrane is widely used in industrial and commercial roofing waterproofing systems due to its soft texture and excellent welding performance. However, since the service life of a roof is generally 20 years and it is exposed to the open air, there are high requirements for coated metal sheets using PVC as a waterproof layer for roofing materials. Specifically, the coated metal sheet is required to have good ultraviolet resistance and anti-aging performance, and the adhesion between the various film layers of the coated metal sheet should be good to ensure the service life of the sheet. In addition, as a coated metal sheet exposed to the outside of a building such as a roof, it also needs to have good dirt resistance to prevent surface dirt or severe aging from seriously affecting the appearance effect.

[0003] Therefore, the current coated metal sheet and roof still need to be improved. SUMMARY

[0004] The present application aims to provide a waterproofing membrane, a coated metal sheet, a preparation method and a roof to solve or alleviate one or more technical problems in the related art.

[0005] As a first aspect of the embodiments of the present application, the present application provides a coated metal sheet. The coated metal sheet comprises: a high-molecular waterproof layer, the high-molecular waterproof layer comprising a glass fiber composite polyvinyl chloride layer and a self-cleaning material, the self-cleaning material being located on one side of an exposed surface of the glass fiber composite polyvinyl chloride layer; an adhesive layer, the adhesive layer being located on one side of the high-molecular waterproof layer; a metal layer, the metal layer being located on a side of the adhesive layer away from the high-molecular waterproof layer, and the glass fiber composite polyvinyl chloride layer comprising a plurality of polyvinyl chloride sub-layers, adjacent polyvinyl chloride sub-layers being separated by a glass fiber sub-layer, the exposed surface being formed by the polyvinyl chloride sub-layers.

[0006] According to the embodiments of the present application, the thickness of the polyvinyl chloride sub-layer is 0.1-1.2mm.

[0007] According to the embodiments of the present application, the number of the plurality of polyvinyl chloride sub-layers is greater than or equal to 2.

[0008] According to the embodiments of the present application, the glass fiber sub-layer comprises a glass fiber non-woven fabric, the glass fiber non-woven fabric having a grammage of 30-50g / m 2 .

[0009] According to an embodiment of the present application, the self-cleaning material forms a coating on one side of the exposed surface of the glass fiber composite PVC sub-layer, or the self-cleaning material is added to the raw material for forming the PVC sub-layer, which is used to form the exposed surface of the high-molecular waterproof layer.

[0010] According to an embodiment of the present application, the material for forming the coating includes polyurethane resin, or the material for forming the coating includes ASA resin, elastomer and functional filler, or the material for forming the coating includes acrylic resin.

[0011] According to an embodiment of the present application, the material for forming the coating includes polyurethane acrylate, acrylate monomer, catalyst and initiator, or the material for forming the coating includes emulsion of hydrophilic chain-extended waterborne polyurethane for forming waterborne polyurethane, which includes isocyanate, polyether polyol and hydrophilic chain extender, the ASA resin includes terpolymer of acrylonitrile, styrene and acrylic rubber, the elastomer includes at least one of thermoplastic polyolefin, thermoplastic rubber and chlorinated polyethylene resin, and the functional filler includes at least one of nano-titanium dioxide, nano-silicon dioxide and mica sheet.

[0012] According to an embodiment of the present application, the coated metal sheet further includes a corrosion-resistant layer, and the thickness of the corrosion-resistant layer is 0.02-0.2mm.

[0013] According to an embodiment of the present application, the adhesive layer has a three-layer structure, and the thickness of each sub-layer is 0.02-0.06mm.

[0014] In another aspect of the present application, a roof is provided. The roof includes the coated metal sheet as described above.

[0015] The coated metal sheet provided by the present application has a waterproof high-molecular layer on the surface layer, which has a material capable of improving the self-cleaning ability of the exposed surface, thereby reducing the adhesion of dust and oil stains, and reducing the difficulty of removing impurities such as oil stains from the surface of the waterproof roll. Therefore, effective cleaning can be achieved by relying on natural conditions such as rainwater washing, and the degree of dirt on the exposed surface caused by use is reduced. Moreover, the coated metal sheet has good durability and service life, and is suitable for manufacturing components or building structures that need to be exposed to natural environment for a long time.

[0016] The above summary is intended to illustrate the present application and is not intended to be limiting in any way. Further aspects, embodiments and features of the present application will be apparent from the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1A structural schematic diagram of a coated metal sheet according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application, and different embodiments can be combined arbitrarily without conflict. Therefore, the following description is considered to be exemplary in nature rather than limiting.

[0019] In a first aspect of the present application, a coated metal sheet is provided. Referring to Figure 1 The coated metal sheet has a polymer waterproof layer 200, an adhesive layer 300 and a metal layer 100. The polymer waterproof layer 200 includes a glass fiber composite polyvinyl chloride layer and a self-cleaning material located on the exposed side of the glass fiber composite polyvinyl chloride layer. The adhesive layer is located on one side of the polymer waterproof layer and is used to fix the metal layer 100 and the polymer waterproof layer 200. In addition, the glass fiber composite polyvinyl chloride layer includes a plurality of polyvinyl chloride sub-layers, and glass fiber sub-layers are arranged between adjacent polyvinyl chloride sub-layers to enhance the mechanical properties of the polymer waterproof layer. The exposed surface of the polymer waterproof layer 200 is formed by the polyvinyl chloride sub-layers. The coated metal sheet improves the self-cleaning ability of the exposed surface of the polymer waterproof layer by using the self-cleaning material, thereby reducing the adhesion of dust and oil stains, and reducing the difficulty of removing impurities such as oil stains from the surface. The adhesion between the film layers of the coated metal sheet is good, the interface performance matching degree is high, it can be formed by a relatively simple process, and has a long service life.

[0020] In the following, the structures of the coated metal sheet according to specific embodiments of the present application are described in detail.

[0021] According to an embodiment of the present application, conventional PVC (polyvinyl chloride) material can be used to form the polyvinyl chloride sub-layers, or the specific composition of the polyvinyl chloride sub-layers in the polymer waterproof layer can be adjusted according to actual conditions, for example, but not limited to, adjusting the content of polyvinyl chloride, and the types and contents of additives, additives and fillers contained in the sub-layers. Specifically, the number of the plurality of polyvinyl chloride sub-layers is greater than or equal to 2, and glass fiber sub-layers are arranged between adjacent polyvinyl chloride sub-layers. Some fillers and additives can be added or not added in the polyvinyl chloride sub-layers away from the exposed surface, for example, a small amount of ultraviolet resistant agent can be added. And a relatively large amount of ultraviolet resistant agent can be added in the polyvinyl chloride sub-layers used as the exposed surface of the polymer waterproof layer to improve the ultraviolet resistance of the exposed surface. Alternatively, fillers such as mica and titanium dioxide can also be added to the polyvinyl chloride sub-layers on the exposed surface to improve the surface appearance effect.

[0022] According to embodiments of the present application, the thickness of the PVC sublayer is not particularly limited, for example, the thickness of each of the plurality of PVC sublayers can independently be 0.1-1.2 mm. That is, the thickness of the plurality of PVC sublayers can be uniform or non-uniform.

[0023] According to embodiments of the present application, the glass fiber sublayer can include a glass fiber nonwoven fabric. The glass fiber nonwoven fabric is low in cost and has good flexibility, and can be conveniently compounded with the PVC sublayer when forming the polymer waterproof layer, for example, by a method including but not limited to roll-to-roll. The glass fiber nonwoven fabric has a grammage of 30-50 g / m 2 The glass fiber nonwoven fabric having a grammage within the above range can better improve the mechanical properties of the polymer waterproof layer, and will not significantly increase the overall thickness or weight of the polymer waterproof layer, thus not having a negative impact on the bonding force between the polymer waterproof layer and other layers of the laminated structure (such as the adhesive layer and the metal layer).

[0024] In addition, since the PVC waterproof material needs to add a plasticizer to form the PVC sublayer, and the plasticizer is prone to migrate during use, the durability of the metal-clad sheet using PVC as the waterproof layer is relatively low, and the polymer waterproof layer is prone to peeling. The present application adds a glass fiber sublayer between adjacent PVC sublayers, which can block the migration path of the plasticizer in the PVC to some extent. Compared with a single-layer PVC waterproof layer, the plasticizer is less likely to migrate to the interface between the polymer waterproof layer and the adhesive layer, thus prolonging the overall service life of the metal-clad sheet.

[0025] According to embodiments of the present application, the specific form of the self-cleaning material in the glass fiber composite PVC layer is not particularly limited. For example, the self-cleaning material can form a coating on the exposed side of the glass fiber composite PVC layer. Alternatively, the self-cleaning material can be added to the raw material for forming the PVC sublayer to form the exposed surface of the polymer waterproof layer. That is, in this embodiment, the self-cleaning material and the PVC raw material are mixed together to form a PVC sublayer with a self-cleaning function.

[0026] Taking the example of the self-cleaning material forming a coating on the exposed side of the PVC sublayer, the material forming the coating can include polyurethane resin, or the material forming the coating includes ASA resin, elastomer, and functional filler, or the material forming the coating includes acrylic resin.

[0027] The above three types of coatings all have good self-cleaning performance, and the materials can form a relatively tight bond with PVC, maintaining the service life of the self-cleaning coating.

[0028] For example, specifically, the material forming the coating layer includes polyurethane acrylate, acrylate monomer, catalyst, and initiator. More specifically, the polyurethane acrylate can be a polyurethane acrylate oligomer. The polyurethane acrylate oligomer is a hydrophobic aliphatic polyurethane acrylate oligomer based on an aliphatic hydrophobic main chain. This type of oligomer has good adhesion, flexibility, and weather resistance after curing, thus improving the interfacial adhesion between the coating layer with self-cleaning function and the polyvinyl chloride sublayer, and ensuring reliable peeling strength between the two. In addition, the addition of this type of oligomer can maintain the flexibility of the self-cleaning layer, so that the high-molecular waterproof layer can maintain the flexibility of the coil material without a significant decrease, maintain the softness of the coil material, and thus facilitate the formation of the coated metal sheet. The oligomer in the material forming the coating layer and the acrylate monomer react during the coating forming process to obtain a coating layer with self-cleaning function.

[0029] Specifically, the specific type of acrylate monomer is not particularly limited, for example, can include at least one selected from methyl methacrylate, ethyl methacrylate, butyl methacrylate, n-butyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, butyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, isobornyl acrylate, hexanediol diacrylate, tridecyl acrylate, octadecyl acrylate, vinyl pyrrolidone, trimethylolpropane triacrylate, dipentaerythritol hexaacrylate, 2-ethylhexyl acrylate, octyl acrylate, lauryl acrylate, lauryl methacrylate, isotridecyl acrylate, cetyl acrylate, ethoxyethoxyethyl acrylate, isodecyl methacrylate, methoxy polyethylene glycol methacrylate, and a vinyl ether monomer.

[0030] According to the embodiments of the present application, the self-cleaning ability of the self-cleaning layer can be improved by further adding functional fillers in the raw materials for forming the acrylic resin. For example, fillers with good light reflection performance can be added to improve the brightness of the entire self-cleaning layer and the surface performance of the self-cleaning layer, to obtain a self-cleaning layer with stronger light reflection ability and a smoother surface. Specifically, the functional fillers include at least one of mica flakes, titanium dioxide, and silicon dioxide. In some examples, the amount of the functional fillers added can be controlled according to other components of the raw materials for forming the acrylic resin to ensure that the coating components have good uniformity and prevent the uniformity of the coating from being reduced due to excessive addition of fillers.

[0031] In some examples, the coating forming the acrylic resin can further include components such as catalysts, accelerators, and functional auxiliaries. For example, a catalyst selected from at least one of dibutyltin dilaurate, dimethyltin dioctyl adipate, dioctyltin oxide, and dibutyl-2-ethylhexanoate, an oxygen scavenger, a defoaming agent, an antioxidant, a thixotropic agent, an ultraviolet light absorber, a light stabilizer, and a leveling agent.

[0032] In other embodiments, the material forming the coating layer includes an emulsion of a hydrophilic chain-extended aqueous polyurethane for forming an aqueous polyurethane, and more particularly, the emulsion includes isocyanate, polyether polyol, and a hydrophilic chain extender. For example, the hydrophilic chain-extended aqueous polyurethane emulsion can be obtained by reacting isocyanate and polyether polyol to form a polyurethane prepolymer, and then adding a hydrophilic chain extender to modify the prepolymer. The mixing ratio of the isocyanate, polyether polyol, and hydrophilic chain extender in the hydrophilic chain-extended aqueous polyurethane emulsion is not particularly limited, and is preferably (30-150):(30-180):(30-100). In addition, the types of the isocyanate, polyether polyol, and hydrophilic chain extender are not particularly limited, for example, the isocyanate can include, but is not limited to, toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, or a combination thereof, and is preferably isophorone diisocyanate. The polyether polyol can include, but is not limited to, polyether diol, fluorine-containing polyol, or a combination thereof, and is preferably polyether diol. The hydrophilic chain extender includes an anionic chain extender, a cationic chain extender, or a combination thereof, and the anionic chain extender includes, but is not limited to, at least one of dimethylol propanoic acid and its salt, dimethylol butanoic acid and its salt, the cationic chain extender includes, but is not limited to, at least one of methyldiethanolamine, ethylenediamine sulfonic acid sodium, N,N-(2-hydroxyethyl)-2-aminosulfonic acid sodium, 1,4-butanediol-2-sulfonic acid sodium, and a diamine or diol compound containing a sulfonic acid group or a sodium sulfonate group, and the hydrophilic chain extender preferably includes dimethylol propanoic acid. The emulsion of this type has excellent mechanical properties and water resistance after curing, as well as good adhesion, flexibility, and weather resistance, thus improving the interfacial adhesion between the coating layer and the polyvinyl chloride sublayer, and ensuring reliable peel strength therebetween. In addition, the addition of the emulsion of this type can maintain the flexibility of the self-cleaning layer, so that the flexibility of the roll material does not decrease significantly, and the softness of the roll material is maintained.

[0033] In addition to the hydrophilic chain-extended aqueous polyurethane emulsion described above, the aqueous polyurethane coating can further include a cellulose ether and an additive to react during the coating forming process to obtain the coating layer. The type of the additive is not particularly limited as long as it can promote the reaction or enhance the physical and chemical properties of the coating. In a specific embodiment, the additive can include, but is not limited to, a pH adjuster, a bactericidal preservative, a defoaming agent, or a combination thereof. In addition, the additive can also include a dispersant.

[0034] According to one embodiment of the present application, the waterborne polyurethane coating includes the following components:

[0035]

[0036] According to embodiments of the present application, the self-cleaning ability of the self-cleaning layer can be improved by further adding functional fillers, nano-titanium dioxide, nano-silicon dioxide or a combination thereof in the raw materials for forming the waterborne polyurethane coating. For example, fillers with better light reflection performance can be added to improve the brightness of the coating as a whole and the surface performance of the coating, so as to obtain a coating with stronger light reflection ability and a smoother surface. Specifically, the functional fillers include at least one of mica flakes and titanium dioxide. In some examples, the amount of the functional fillers added can be controlled according to other components of the waterborne polyurethane coating to ensure that the coating components have good uniformity, so as to prevent the uniformity of the coating from being reduced due to excessive addition of fillers. In one specific example, when the raw materials include functional fillers, the additives preferably include dispersants to allow the functional fillers to be fully dispersed in the mixture.

[0037] In other embodiments, the material for forming the coating includes ASA resin and elastomer. Specifically, the ASA resin includes a terpolymer formed by acrylonitrile, styrene and acrylic rubber, and the elastomer includes at least one of thermoplastic polyolefin, thermoplastic rubber and chlorinated polyethylene resin.

[0038] Specifically, the ASA resin can include a terpolymer formed by acrylonitrile, styrene and acrylic rubber. The use of acrylic rubber without unsaturated double bonds can make the coating have stronger resistance to degradation, aging and discoloration caused by ultraviolet radiation, and stronger resistance to decomposition and discoloration caused by high temperature in the oxidation process in the atmosphere, thereby greatly improving the anti-aging and weather resistance of the self-cleaning layer. After long-term external environmental wind erosion, the color change of the ASA resin itself is not significant, and the ASA resin can better resist the situation of surface micro-cracks and cavitation caused by wind erosion or water flow. The ASA resin itself has strong anti-static ability, so the self-cleaning performance can be further improved to prevent the adhesion of dust and oil stains. The elastomer can better maintain the flexibility of the coating and can improve the interface performance between the ASA resin and the polyvinyl chloride material. Specifically, the elastomer can include at least one of thermoplastic polyolefin, thermoplastic rubber and chlorinated polyethylene resin.

[0039] In one specific embodiment, the raw materials for forming the coating can include the following components:

[0040]

[0041] According to embodiments of the present application, the specific type of antioxidant, functional filler is not particularly limited and can be selected by those skilled in the art according to the specific composition of the ASA resin and the elastomer. For example, the antioxidant can be selected from at least one of a phenolic antioxidant and a phosphite antioxidant, so that the oxidation resistance of the self-cleaning layer can be better improved. Since the coating will serve as the exposed surface of the coated metal sheet, the addition of the antioxidant can on the one hand improve the service life of the waterproofing membrane, and on the other hand can also indirectly prevent dirt from easily accumulating on the exposed surface by improving the oxidation resistance due to oxidative damage.

[0042] In yet another aspect of the present application, a roof is provided. The roof comprises the coated metal sheet as described above. The roof has all the features and advantages of the coated metal sheet as described above, and will not be repeated here.

[0043] In the present application, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0044] The above application provides many different embodiments or examples for implementing the different structures of the present application. In order to simplify the present application, the components and arrangements of specific examples are described above. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0045] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coated metal sheet, characterized in that, The coated metal sheet comprises: a polymer waterproof layer, the polymer waterproof layer comprising a glass fiber composite polyvinyl chloride layer and a self-cleaning material on the exposed side of the glass fiber composite polyvinyl chloride layer; an adhesive layer on one side of the polymer waterproof layer; a metal layer on the other side of the adhesive layer, and the glass fiber composite polyvinyl chloride layer comprises a plurality of polyvinyl chloride sub-layers, and adjacent polyvinyl chloride sub-layers are separated by a glass fiber sub-layer, and the exposed surface is formed by the polyvinyl chloride sub-layers.

2. The plated metal sheet according to claim 1, characterized by The thickness of the polyvinyl chloride sub-layer is 0.1-1.2mm.

3. The plated metal sheet according to claim 1, characterized by The number of the plurality of polyvinyl chloride sub-layers is greater than or equal to 2.

4. The plated metal sheet according to claim 1, characterized by The glass fiber sublayer comprises a glass fiber nonwoven fabric, the grammage of the glass fiber nonwoven fabric is 30-50 g / m 2 .

5. The plated metal sheet according to claim 1, characterized in that, The self-cleaning material forms a coating on the exposed side of the glass fiber composite polyvinyl chloride layer, or The self-cleaning material is added to the raw material for forming the polyvinyl chloride sub-layer, which is used to form the exposed surface of the polymer waterproof layer.

6. The plated metal sheet according to claim 5, characterized in that The material forming the coating comprises polyurethane resin, or The material forming the coating comprises ASA resin, elastomer, and functional filler, or The material forming the coating comprises acrylic resin.

7. The plated metal sheet according to claim 6, characterized in that The material forming the coating comprises polyurethane acrylate, acrylate monomer, catalyst, and initiator, or The material forming the coating comprises an emulsion of hydrophilic chain-extended waterborne polyurethane for forming waterborne polyurethane, the emulsion comprising isocyanate, polyether polyol, and hydrophilic chain extender, The ASA resin comprises a terpolymer of acrylonitrile, styrene, and acrylic rubber, The elastomer comprises at least one of thermoplastic polyolefin, thermoplastic rubber, and chlorinated polyethylene resin; The functional filler comprises at least one of nanometer titanium dioxide, nanometer silicon dioxide, and mica flake.

8. The plated metal sheet according to claim 1, characterized in that The coated metal sheet further comprises an anticorrosion layer, and the thickness of the anticorrosion layer is 0.02-0.2mm.

9. The plated metal sheet according to claim 1, characterized in that, The adhesive layer has a three-layer structure, and the thickness of each sub-layer is 0.02-0.06mm.

10. A roof characterized in that, The coated metal sheet comprises any one of claims 1-9.

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