Weather-resistant anticorrosive membrane material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of polymer waterproof coiled materials, in particular to a weather-resistant anticorrosive film material and a preparation method and application thereof. The weather-resistant anticorrosive film material comprises a functional layer, a self-adhesive layer and a release film layer, the functional layer comprises a weather-proof layer, a barrier layer and a matrix layer; the weather-proof layer comprises first matrix resin, a first polyolefin elastomer, an antioxidant, a light stabilizer, a self-cleaning filler, an acid acceptor and a color master batch; the blocking layer comprises second matrix resin, a second polyolefin elastomer, an ultraviolet blocking filler, an antioxidant and a light stabilizer; and the matrix layer comprises third matrix resin and a third polyolefin elastomer. The weather-resistant anti-corrosion film material obtained through the arrangement of a multi-layer structure has excellent weather resistance, self-cleaning property, ultraviolet barrier property and acid and alkali corrosion resistance, can protect the self-adhesive layer from being damaged by ultraviolet rays, acid and alkali corrosion and the like, and provides a new selectivity for anti-corrosion waterproof projects with long-term exposure use requirements, such as roof construction and maintenance.

Description

Technical Field

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

[0002] Waterproofing is an important structure in modern buildings and an important guarantee for improving the service life and safety of buildings. Especially in steel structure buildings, if they are not properly protected, they are very susceptible to corrosion during use, resulting in increased maintenance costs.

[0003] Self-adhesive butyl waterproofing membrane is a commonly used waterproofing and repair solution for roofs. It is easy to construct, safe and environmentally friendly, and is widely used in new construction and repair projects of roofs. However, the surface materials used in most self-adhesive butyl waterproofing membranes have poor weather resistance and are difficult to meet the requirements for exposed applications such as roofs. After a short period of exposure, they will become powdery, cracked, and have serious surface stains.

[0004] The patent application with publication number CN117719221A describes an exposed weather-resistant layer, including an aging-resistant functional layer, a barrier functional layer and a main body layer, and the upper surfaces of the aging-resistant functional layer, the barrier functional layer and the main body layer are laminated in sequence from top to bottom using a weather-resistant adhesive. However, the use of weather-resistant adhesives, on the one hand, makes the product process cumbersome and inconvenient for continuous processing; on the other hand, it also leads to poor product performance stability. In addition, problems such as severe surface stains caused by exposed use have not been effectively solved.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] One object of the present invention is to provide a weather-resistant and anti-corrosion membrane material, which has the properties of weather resistance, self-cleaning, acid and alkali corrosion resistance, etc., and can be used exposed to provide long-term protection for buildings.

[0007] Another object of the present invention is to provide a method for preparing a weather-resistant and anti-corrosion film material.

[0008] Another object of the present invention is to provide an application of weather-resistant and anti-corrosion membrane materials in the protection of building roofs.

[0009] In order to achieve the above-mentioned object of the present invention, the present invention provides a weather-resistant and anti-corrosion film material on one hand, comprising a functional layer, a self-adhesive layer and a release film layer arranged in sequence from top to bottom;

[0010] The functional layer includes a weather-resistant layer, a barrier layer and a substrate layer arranged in sequence from top to bottom;

[0011] The weather-resistant layer comprises the following components by weight: 60-75 parts of a first base resin, 15-35 parts of a first polyolefin elastomer, 0.1-3 parts of an antioxidant, 0.1-3 parts of a light stabilizer, 0.1-5 parts of a self-cleaning filler, 0.1-3 parts of an acid absorber, and 0-10 parts of a masterbatch;

[0012] The barrier layer comprises the following components by weight: 70-80 parts of a second base resin, 10-20 parts of a second polyolefin elastomer, 1-15 parts of an ultraviolet barrier filler, 0.1-3 parts of an antioxidant, and 0.1-3 parts of a light stabilizer;

[0013] The base layer comprises the following components by weight: 80-90 parts of a third base resin and 10-20 parts of a third polyolefin elastomer.

[0014] In a specific embodiment of the present invention, the first base resin, the second base resin, and the third base resin are each independently selected from at least one of PE resin, PP resin, and EVA resin.

[0015] In a specific embodiment of the present invention, the first polyolefin elastomer, the second polyolefin elastomer and the third polyolefin elastomer are each independently selected from at least one of Dow VERSIFY 2200, Dow VERSIFY 2300, Dow VERSIFY 3200, Dow VERSIFY 3401, Vistamaxx 3000 and Vistamaxx 6000.

[0016] In a specific embodiment of the present invention, in the weather-resistant layer, the mass ratio of the first base resin to the first polyolefin elastomer is (2.2-3):1.

[0017] In a specific embodiment of the present invention, in the barrier layer, the mass ratio of the second base resin to the second polyolefin elastomer is (4-6):1.

[0018] In a specific embodiment of the present invention, in the base layer, the mass ratio of the third base resin to the third polyolefin elastomer is (5-6):1.

[0019] In a specific embodiment of the present invention, the self-cleaning filler is super-hydrophilic inorganic silicon nanoparticles.

[0020] In a specific embodiment of the present invention, the acid absorbent includes at least one of hydrotalcite, calcium stearate and zinc oxide.

[0021] In a specific embodiment of the present invention, the UV blocking filler includes at least one of zinc oxide, magnesium oxide and titanium dioxide.

[0022] In a specific embodiment of the present invention, the thickness ratio of the weather-resistant layer, the barrier layer and the base layer is (0.5-2) : 1 : (2-3). Further, the thickness of the functional layer is 0.1-0.3 mm.

[0023] In a specific embodiment of the present invention, the thickness of the self-adhesive layer is 0.25-0.7 mm.

[0024] In a specific embodiment of the present invention, the self-adhesive layer is a modified butyl rubber layer.

[0025] In a specific embodiment of the present invention, the release film layer includes at least one of a PE film, a PP film and a PET film.

[0026] Another aspect of the present invention provides a method for preparing any one of the above-mentioned weather-resistant membrane materials, comprising the following steps:

[0027] (a) mixing, melt-extruding and granulating the weather-resistant layer, the barrier layer and the base layer according to the composition ratio, respectively, to obtain weather-resistant layer granules, barrier layer granules and base layer granules;

[0028] (b) co-extruding the weather-resistant layer pellets, the barrier layer pellets and the base layer pellets by film blowing or co-extrusion casting to obtain a functional layer;

[0029] (c) The functional layer and the release film layer are compounded by using a self-adhesive layer to obtain the weather-resistant and anti-corrosion film material.

[0030] Another aspect of the present invention provides use of any one of the above-mentioned weather-resistant and anticorrosive membrane materials in the protection of building roofs.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) The weather-resistant and anti-corrosion membrane material obtained by the multi-layer structure of the present invention has excellent weather resistance, self-cleaning, UV blocking and acid and alkali corrosion resistance, and can protect the self-adhesive layer from damage by ultraviolet agents and acid and alkali corrosion, thereby providing a new option for waterproofing projects with long-term exposure requirements such as new roof construction and maintenance;

[0033] (2) The present invention adopts a multi-layer structure and regulates the composition of each layer so that the functional layers have good compatibility with each other. An integrated adhesive film can be obtained by multi-layer co-extrusion without the need for an additional adhesive process, thereby simplifying the operation, enabling continuous industrial production, and ensuring the stability of product performance. DETAILED DESCRIPTION

[0034] The technical scheme of the present invention will be clearly and completely described below in conjunction with specific embodiments, but it will be appreciated by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work, all belong to the scope of protection of the present invention. If specific conditions are not indicated in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not indicated in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] On one hand, the present invention provides a weather-resistant and anti-corrosion film material, comprising a functional layer, a self-adhesive layer and a release film layer arranged in sequence from top to bottom;

[0037] The functional layer includes a weather-resistant layer, a barrier layer and a base layer arranged in sequence from top to bottom;

[0038] The weather-resistant layer comprises the following components by weight: 60-75 parts of a first base resin, 15-35 parts of a first polyolefin elastomer, 0.1-3 parts of an antioxidant, 0.1-3 parts of a light stabilizer, 0.1-5 parts of a self-cleaning filler, 0.1-3 parts of an acid absorber, and 0-10 parts of a masterbatch;

[0039] The barrier layer comprises the following components by weight: 70-80 parts of a second base resin, 10-20 parts of a second polyolefin elastomer, 1-15 parts of an ultraviolet barrier filler, 0.1-3 parts of an antioxidant, and 0.1-3 parts of a light stabilizer;

[0040] The base layer comprises the following components by weight: 80-90 parts of a third base resin and 10-20 parts of a third polyolefin elastomer.

[0041] The weather-resistant and anticorrosive membrane material obtained by the multi-layer structure of the present invention has excellent weather resistance, self-cleaning, UV barrier and acid and alkali corrosion resistance, and can protect the self-adhesive layer from damage by ultraviolet agents and acid and alkali corrosion, etc., and provides new selectivity for waterproofing projects with long-term exposure requirements such as new roof construction and maintenance. In addition, the present invention regulates the composition of each layer so that the functional layers have good compatibility, and an integrated adhesive film can be obtained by multi-layer co-extrusion, without the need for additional adhesive processes, and can ensure the mechanical properties of the functional layer and the adhesive properties with the self-adhesive layer.

[0042] The weather-resistant and anti-corrosion membrane material of the present invention can be set in different colors according to actual needs, and has a durable self-cleaning property. It can form a water film on the surface of the membrane material on rainy days and take away dust. It has a good decorative effect when applied to roofs or exterior walls.

[0043] For example, in different embodiments, in the weather-resistant layer, the amounts of each component in parts by weight may be as follows:

[0044] The amount of the first base resin can be 60 parts, 62 parts, 65 parts, 68 parts, 70 parts, 72 parts, 75 parts or a range consisting of any two of them;

[0045] The amount of the first polyolefin elastomer can be 15 parts, 20 parts, 25 parts, 30 parts, 35 parts or a range consisting of any two thereof;

[0046] The amount of the antioxidant can be 0.1 part, 0.5 part, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts or a range consisting of any two of them;

[0047] The amount of the light stabilizer can be 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts or a range consisting of any two of them;

[0048] The amount of the self-cleaning filler can be 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts or a range consisting of any two of them;

[0049] The amount of the acid absorber can be 0.1 part, 0.5 part, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts or a range consisting of any two of them;

[0050] The masterbatch can be selected according to actual needs. For example, if there is a requirement for the color of the film material, a certain amount of masterbatch can be added to adjust the color of the film material; specifically, the amount of the masterbatch can be 1 part, 3 parts, 5 parts, 8 parts, 10 parts or a range consisting of any two of them.

[0051] For example, in different embodiments, the amounts of the components in the barrier layer may be as follows, by weight:

[0052] The amount of the second base resin can be 70 parts, 72 parts, 75 parts, 78 parts, 80 parts or a range consisting of any two of them;

[0053] The amount of the second polyolefin elastomer can be 10 parts, 12 parts, 15 parts, 18 parts, 20 parts or a range consisting of any two thereof;

[0054] The amount of the UV blocking filler can be 1 part, 3 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts or a range consisting of any two of them;

[0055] The amount of the antioxidant can be 0.1 part, 0.5 part, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts or a range consisting of any two of them;

[0056] The amount of the light stabilizer can be 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts or a range consisting of any two of them.

[0057] For example, in different embodiments, in the base layer, the amounts of each component in parts by weight may be as follows:

[0058] The amount of the third base resin can be 80 parts, 82 parts, 85 parts, 88 parts, 90 parts or a range consisting of any two of them;

[0059] The amount of the third polyolefin elastomer can be 10 parts, 12 parts, 15 parts, 18 parts, 20 parts or a range consisting of any two of them.

[0060] In a specific embodiment of the present invention, the first base resin, the second base resin, and the third base resin are each independently selected from at least one of PE resin, PP resin, and EVA resin.

[0061] In a specific embodiment of the present invention, the first polyolefin elastomer, the second polyolefin elastomer and the third polyolefin elastomer are each independently selected from at least one of Dow VERSIFY 2200, Dow VERSIFY 2300, Dow VERSIFY 3200, Dow VERSIFY 3401, Vistamaxx 3000 and Vistamaxx 6000.

[0062] In a specific embodiment of the present invention, in the weather-resistant layer, the mass ratio of the first base resin to the first polyolefin elastomer is (2.2-3):1.

[0063] The present invention adjusts the mass ratio of the first base resin and the first polyolefin elastomer of the weather-resistant layer to ensure the compatibility of the components in the weather-resistant layer and the compatibility with other layers, and ensures the mechanical properties of the film as a whole. For example, in different embodiments, the mass ratio of the first base resin to the first polyolefin elastomer in the weather-resistant layer can be 2.2:1, 2.5:1, 2.8:1, 3:1, or a range consisting of any two of them.

[0064] In a specific embodiment of the present invention, in the barrier layer, the mass ratio of the second base resin to the second polyolefin elastomer is (4-6):1.

[0065] The present invention improves the compatibility of the weather-resistant layer, the barrier layer and the base layer by adjusting the mass ratio of the second base resin to the second polyolefin elastomer in the barrier layer, and improves the matching of the mechanical properties of the three layers, so as to ensure that the film material has excellent mechanical properties. For example, in different embodiments, the mass ratio of the second base resin to the second polyolefin elastomer in the barrier layer can be 4:1, 4.2:1, 4.5:1, 4.8:1, 5:1, 5.2:1, 5.5:1, 5.8:1, 6:1 or a range consisting of any two of them.

[0066] In a specific embodiment of the present invention, in the base layer, the mass ratio of the third base resin to the third polyolefin elastomer is (5-6):1.

[0067] For example, in different embodiments, in the base layer, the mass ratio of the third base resin to the third polyolefin elastomer can be 5:1, 5.2:1, 5.5:1, 5.8:1, 6:1 or a range consisting of any two of them.

[0068] In a specific embodiment of the present invention, the self-cleaning filler is a super-hydrophilic inorganic silicon nanoparticle. Specifically, surface-modified multi-scale nano-silica can be used, which has super-hydrophilicity. The self-cleaning filler used in the present invention can be isocyanate-silane modified nano-silica. Furthermore, the particle size of the self-cleaning filler is 10 to 100 nm.

[0069] In a specific embodiment of the present invention, the preparation method of isocyanate-silane modified nano-silica comprises the following steps:

[0070] (a) preparing silica nanoparticles; among the silica nanoparticles, the silica nanoparticles with a particle size of 10 to 50 nm (particle size D satisfies: 10 nm ≤ D < 50 nm) account for 50 wt % to 70 wt %, and the silica nanoparticles with a particle size of 50 to 100 nm (particle size D satisfies: 50 nm ≤ D < 100 nm) account for 30 wt % to 50 wt %;

[0071] (b) reacting isocyanate silane and polysorbate-20 in a temperature-controlled glass reactor to obtain a surface modifier, wherein the catalyst is dibutyltin dilaurate; wherein the mass ratio of isocyanate silane to polysorbate-20 is 1:(5-6); the reaction temperature is 65-75° C., and the reaction time is 5-10 hours; wherein the isocyanate silane includes isocyanate propyltriethoxysilane;

[0072] (c) dispersing silica nanoparticles, a surface modifier and polyethylene glycol in deionized water, and obtaining isocyanate-silane modified nano-silica by stirring, ball milling, ultrasonication and centrifugation; wherein the mass ratio of silica nanoparticles to the surface modifier is (3.5-4.5):1, and the amount of polyethylene glycol is 4wt%-6wt% of the sum of the mass of the silica nanoparticles and the surface modifier.

[0073] In a specific embodiment of the present invention, the acid absorber includes at least one of hydrotalcite, calcium stearate and zinc oxide. Further, the particle size of the acid absorber is 0.3-1.5 μm.

[0074] In a specific embodiment of the present invention, the UV blocking filler includes at least one of zinc oxide, magnesium oxide and titanium dioxide. Further, the particle size of the UV blocking filler is 0.2-0.5 μm.

[0075] In a specific embodiment of the present invention, the antioxidant includes at least one of antioxidant 1010 , antioxidant 1076 , antioxidant 1024 , antioxidant 168 , antioxidant 264 , and antioxidant 245 .

[0076] In a specific embodiment of the present invention, the light stabilizer includes at least one of a hindered amine light stabilizer, a benzophenone light stabilizer and a benzotriazole light stabilizer.

[0077] In a specific embodiment of the present invention, the thickness ratio of the weather-resistant layer, the barrier layer and the base layer is (0.5-2) : 1 : (2-3). Further, the thickness of the functional layer is 0.1-0.3 mm.

[0078] For example, in different embodiments, the thickness ratio of the weather-resistant layer, the barrier layer and the base layer can be 0.5﹕1﹕2, 0.5﹕1﹕2.5, 0.5﹕1﹕3, 1﹕1﹕2, 1﹕1﹕2.5, 1﹕1﹕3, 1.5﹕1﹕2, 1.5﹕1﹕2.5, 1.5﹕1﹕3, 2﹕1﹕2, 2﹕1﹕2.5, 2﹕1﹕3 or a range consisting of any two thereof. The thickness of the functional layer can be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm or a range consisting of any two thereof.

[0079] In a specific embodiment of the present invention, the thickness of the self-adhesive layer is 0.25-0.7 mm, preferably 0.3-0.5 mm. For example, in different embodiments, the thickness of the self-adhesive layer can be 0.25 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, or any two thereof.

[0080] In a specific embodiment of the present invention, the self-adhesive layer comprises the following components in parts by weight: 20-60 parts of butyl rubber, 10-20 parts of polyisobutylene, 15-30 parts of filler, 0.5-5 parts of rosin resin and 0.5-3 parts of antioxidant.

[0081] In a specific embodiment of the present invention, in the self-adhesive layer, the filler is calcium carbonate. Furthermore, the filler has a mesh size of 900 to 1400 meshes.

[0082] In a specific embodiment of the present invention, the release film layer includes at least one of a PE film, a PP film and a PET film. The material and thickness of the specific release film layer can be adjusted according to actual needs to achieve anti-sticking and facilitate the film material to be made into a roll.

[0083] Another aspect of the present invention provides a method for preparing any one of the above-mentioned weather-resistant and anticorrosive membrane materials, comprising the following steps:

[0084] (a) mixing and melt-extruding the weather-resistant layer, the barrier layer and the base layer according to the composition ratio, respectively, to obtain weather-resistant layer granules, barrier layer granules and base layer granules; mixing and kneading according to the composition ratio of the self-adhesive layer to obtain the self-adhesive layer material;

[0085] (b) co-extruding the weather-resistant layer pellets, the barrier layer pellets and the base layer pellets by blown film or co-extrusion casting to obtain a functional layer;

[0086] (c) The functional layer and the release film layer are compounded by using a self-adhesive layer to obtain a weather-resistant and anti-corrosion film material.

[0087] In a specific embodiment of the present invention, a twin-screw extruder is used for melt extrusion granulation; the melt extrusion temperature is 180-210°C, the screw speed is 300-350rpm, the feeding rate is 5-7Hz, and the twin-screw aspect ratio is (36-44):1.

[0088] In a specific embodiment of the present invention, an internal mixer is used for internal mixing; the temperature of the internal mixer is 180-220° C., the rotation speed is 30-60 Hz, and the internal mixing time is 0.5-1.5 h.

[0089] In a specific embodiment of the present invention, step (c) comprises: coating the material of the self-adhesive layer on the surface of the base layer of the functional layer, and then compounding with the release film layer. Further, the coating temperature is 110-130° C. The specific coating temperature can be adjusted according to the material used for the self-adhesive layer.

[0090] Another aspect of the present invention provides the use of any one of the above-mentioned weather-resistant and anticorrosive membrane materials in the protection of building roofs.

[0091] Example 1

[0092] This embodiment provides a weather-resistant and anti-corrosion film material, including a functional layer, a self-adhesive layer and a release film layer arranged in sequence from top to bottom. The functional layer includes a weather-resistant layer, a barrier layer and a base layer arranged in sequence from top to bottom, and the base layer is laminated with the self-adhesive layer.

[0093] The weather-resistant layer includes the following components by weight: 63 parts of PE resin, 25 parts of Dow VERSIFY 3200, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168, 0.4 parts of antioxidant 264, 0.7 parts of light stabilizer UV-622, 0.3 parts of light stabilizer UV-326, 3 parts of self-cleaning filler, and 2 parts of hydrotalcite. Among them, the self-cleaning filler is isocyanate-silane modified nano-silica, and the specific preparation method includes the following steps:

[0094] (a) preparing silica nanoparticles; among the silica nanoparticles, the silica nanoparticles with a particle size of 10 to 50 nm (particle size D satisfies: 10 nm ≤ D < 50 nm) account for 50 wt % to 70 wt %, and the silica nanoparticles with a particle size of 50 to 100 nm (particle size D satisfies: 50 nm ≤ D < 100 nm) account for 30 wt % to 50 wt %.

[0095] (b) 15 parts by mass of isocyanatepropyltriethoxysilane and 85 parts by mass of polysorbate-20 were stirred in a temperature-controlled glass reactor, and when the temperature was raised to 70° C., 0.1 parts by mass of dibutyltin dilaurate were added, and the mixture was reacted for 7 hours under nitrogen protection to obtain a surface modifier.

[0096] (c) dispersing 80 parts by weight of silica nanoparticles, 20 parts by weight of the surface modifier and 5 parts by weight of polyethylene glycol in deionized water, stirring at room temperature for 1.5 hours, ultrasonicating in an ice bath for 10 minutes, and centrifuging at 3500 rpm for 5 minutes to obtain isocyanate-silane modified nano-silica;

[0097] The barrier layer includes the following components in parts by weight: 73 parts of PE resin, 15 parts of Dow VERSIFY 3200, 10 parts of titanium dioxide, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168 and 0.5 parts of light stabilizer UV-622.

[0098] The base layer includes the following components by weight: 85 parts of PP resin and 15 parts of Dow VERSIFY 3401.

[0099] The self-adhesive layer is a modified butyl rubber layer, including the following components by weight: 50 parts of butyl rubber, 20 parts of polyisobutylene, 25 parts of calcium carbonate, 4 parts of rosin resin, 0.5 parts of antioxidant 264, and 0.5 parts of antioxidant 168; the release film layer is a PET film.

[0100] The method for preparing the weather-resistant and anti-corrosion film material of this embodiment comprises the following steps:

[0101] (1) The raw materials required for the weather-resistant layer, the barrier layer and the base layer are mixed uniformly in a high-speed mixer according to the ratio, and then extruded and granulated by a twin-screw extruder to obtain weather-resistant layer granules, barrier layer granules and base layer granules respectively; wherein the extrusion temperature of the twin-screw extruder is 190°C, the screw speed is 300rpm, the feeding speed is 7Hz, and the twin-screw aspect ratio L:D=40:1. The self-adhesive layer is added into an internal mixer according to the required raw material ratio and kneaded for 1h to obtain the self-adhesive layer material, wherein the temperature of the internal mixer is 200°C and the speed is 50Hz.

[0102] (2) The weather-resistant layer pellets, the barrier layer pellets and the base layer pellets are co-extruded and blown to obtain a functional layer; wherein the thickness of the weather-resistant layer is 0.04 mm, the thickness of the barrier layer is 0.04 mm, and the thickness of the base layer is 0.08 mm.

[0103] (3) A self-adhesive layer material is coated on the base layer of the functional layer, and then compounded with the release film layer to obtain a weather-resistant and anti-corrosion film material; wherein the thickness of the self-adhesive layer is 0.4 mm.

[0104] Example 2

[0105] This embodiment refers to the weather-resistant and anti-corrosion film material and its preparation method of Embodiment 1, and the only difference is that the thickness of the weather-resistant layer, the barrier layer and the base layer are different.

[0106] In this embodiment, the thickness of the weather-resistant layer is 0.02 mm, the thickness of the barrier layer is 0.04 mm, and the thickness of the base layer is 0.1 mm.

[0107] Example 3

[0108] This embodiment refers to the weather-resistant and anti-corrosion film material and its preparation method of Embodiment 1, and the only difference is that the thickness of the weather-resistant layer, the barrier layer and the base layer are different.

[0109] In this embodiment, the thickness of the weather-resistant layer is 0.04 mm, the thickness of the barrier layer is 0.02 mm, and the thickness of the base layer is 0.1 mm.

[0110] Example 4

[0111] This embodiment refers to the weather-resistant and anticorrosive film material and its preparation method of Embodiment 1, and the only difference is that the composition of the barrier layer in the functional layer is different.

[0112] The barrier layer of this embodiment includes the following components in parts by weight: 70 parts of PE resin, 18 parts of Dow VERSIFY 3200, 10 parts of titanium dioxide, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168 and 0.5 parts of light stabilizer UV-622.

[0113] Example 5

[0114] This embodiment refers to the weather-resistant and anticorrosive film material and its preparation method of Embodiment 1, and the only difference is that the composition of the barrier layer in the functional layer is different.

[0115] The barrier layer of this embodiment includes the following components in parts by weight: 76 parts of PE resin, 12 parts of Dow VERSIFY 3200, 10 parts of titanium dioxide, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168 and 0.5 parts of light stabilizer UV-622.

[0116] Example 6

[0117] This embodiment refers to the weather-resistant and anticorrosive film material and preparation method thereof of Embodiment 1, with the only difference being that the composition of the weather-resistant layer in the functional layer is different.

[0118] The weather-resistant layer of this embodiment includes the following components in parts by weight: 60 parts of PE resin, 28 parts of Dow VERSIFY3200, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168, 0.4 parts of antioxidant 264, 0.7 parts of light stabilizer UV-622, 0.3 parts of light stabilizer UV-326, 3 parts of self-cleaning filler, and 2 parts of hydrotalcite.

[0119] Example 7

[0120] This embodiment refers to the weather-resistant and anticorrosive film material and preparation method thereof of Embodiment 1, with the only difference being that the composition of the weather-resistant layer in the functional layer is different.

[0121] The weather-resistant layer of this embodiment includes the following components in parts by weight: 68 parts of PE resin, 20 parts of Dow VERSIFY3200, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168, 0.4 parts of antioxidant 264, 0.7 parts of light stabilizer UV-622, 0.3 parts of light stabilizer UV-326, 3 parts of self-cleaning filler, and 2 parts of hydrotalcite.

[0122] Example 8

[0123] This embodiment refers to the weather-resistant and anticorrosive film material and its preparation method of Embodiment 1, and the only difference is that the composition of the base layer in the functional layer is different.

[0124] The base layer of this embodiment includes the following components by weight: 80 parts of PP resin and 20 parts of Dow VERSIFY 3401.

[0125] Example 9

[0126] This embodiment refers to the weather-resistant and anticorrosive film material and its preparation method of Embodiment 1, and the only difference is that the composition of the base layer in the functional layer is different.

[0127] The base layer of this embodiment includes the following components in parts by weight: 90 parts of PP resin and 10 parts of Dow VERSIFY 3401.

[0128] Comparative Example 1

[0129] Comparative Example 1 refers to the weather-resistant and anti-corrosion film material and its preparation method of Example 1, except that: the functional layer does not include a weather-resistant layer, and the thickness of the base layer is different.

[0130] The thickness of the base layer in Comparative Example 1 was 0.12 mm.

[0131] Comparative Example 2

[0132] Comparative Example 2 refers to the weather-resistant and anticorrosive film material and its preparation method of Example 1, with the difference that: the functional layer does not include a barrier layer, and the thickness of the base layer is different.

[0133] The thickness of the base layer in Comparative Example 2 was 0.12 mm.

[0134] Comparative Example 3

[0135] Comparative Example 3 refers to the weather-resistant and anticorrosive film material and its preparation method of Example 1, with the difference that: in the functional layer, the composition of the weather-resistant layer is different.

[0136] The weather-resistant layer of Comparative Example 3 includes the following components in parts by weight: 88 parts of PE resin, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168, 0.4 parts of antioxidant 264, 0.7 parts of light stabilizer UV-622, 0.3 parts of light stabilizer UV-326, 3 parts of self-cleaning filler, and 2 parts of hydrotalcite.

[0137] Comparative Example 4

[0138] Comparative Example 4 refers to the weather-resistant and anticorrosive film material and its preparation method of Example 1, with the difference that: in the functional layer, the composition of the barrier layer is different.

[0139] The barrier layer of Comparative Example 4 includes the following components in parts by weight: 88 parts of PE resin, 10 parts of titanium dioxide, 0.4 parts of antioxidant 1010, 0.2 parts of antioxidant 168 and 0.5 parts of light stabilizer UV-622.

[0140] Comparative Example 5

[0141] Comparative Example 5 refers to the weather-resistant and anticorrosive film material and its preparation method of Example 1, with the difference that: in the functional layer, the composition of the main layer is different.

[0142] The main body layer of Comparative Example 5 includes only PP resin.

[0143] Experimental example

[0144] The performance tests were carried out on the weather-resistant and anticorrosive membrane materials of different embodiments and comparative examples. The specific test items are as follows and the test results are shown in Table 1.

[0145] Mechanical properties test: tensile strength and elongation at break were tested according to method B in GB / T 328.9-2007; the tensile speed was 250 mm / min; the tensile strength was calculated according to the thickness of the polymer film layer; the elongation at break of the polymer film layer was recorded as the elongation at break of the film.

[0146] Artificial climate accelerated aging appearance: Tested in accordance with GB / T 18244-2022 standard, the cumulative radiation energy at a wavelength of 340nm should not be less than 5100kJ / (m 2 ·nm), xenon lamp aging time is 2750h; observe whether there is delamination, powdering, peeling and shedding.

[0147] UV blocking rate: UV transmittance is tested by UV spectrophotometer to obtain the spectral absorption curve of the sample in the range of 200-700nm, and the transmittance values ​​at wavelengths of 300nm, 320nm, 380nm, and 400nm are recorded (TUV 300 、TUV 320 、TUV 380 、TUV 400 ), accordingly, the UV blocking rate of the sample at each wavelength is 100% -TUV 300 、100%-TUV 320 、100%-TUV 380 、100%-TUV 400 The UV blocking rate of each group of weather-resistant and anti-corrosion films is obtained by calculating the average value of the UV blocking rate of the sample at each wavelength.

[0148] Reflection coefficient reduction rate: Tested by the brushing method in GB / T 9780-2013 standard, the initial average reflection coefficient of the membrane surface and the average reflection coefficient of the membrane after contamination are obtained, and the reflection coefficient reduction rate of the membrane surface is calculated. The lower the reflection coefficient reduction rate of the membrane after contamination, the better the self-cleaning effect.

[0149] Table 1 Test results of film performance of different embodiments and comparative examples

[0150]

[0151]

[0152] It can be seen from the above test results that the weather-resistant and anti-corrosion film material of the present invention is arranged through a multi-layer structure, and the composition of each layer is regulated so that the functional layers have good compatibility. An integrated adhesive film can be obtained by a multi-layer co-extrusion method to meet the functions of weather resistance, self-cleaning, UV blocking and the like.

[0153] Comparing Example 1 with Comparative Example 1, it can be seen that when the weather-resistant layer is not provided in the film material, the weather-resistant performance of the film material will be seriously affected. Comparing Example 1 with Comparative Example 2, it can be seen that when the barrier layer is not provided in the film material, the ultraviolet barrier property of the film material will be affected, and then the protective effect of the functional layer on the self-adhesive layer will be affected, resulting in shedding and other phenomena. Comparing Example 1 with Comparative Examples 3 to 5, it can be seen that if polyolefin elastomer is not added to each layer of the functional layer, the compatibility and bonding between the components in the functional layer and the layers will be seriously affected, resulting in a significant decrease in the self-cleaning effect and mechanical properties of the product, and stratification will occur after aging.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Weather-resistant and anti-corrosion film material, characterized in that: It includes a functional layer, a self-adhesive layer and a release film layer arranged in sequence from top to bottom; The functional layer includes a weather-resistant layer, a barrier layer and a substrate layer arranged in sequence from top to bottom; The weather-resistant layer comprises the following components by weight: 60-75 parts of a first base resin, 15-35 parts of a first polyolefin elastomer, 0.1-3 parts of an antioxidant, 0.1-3 parts of a light stabilizer, 0.1-5 parts of a self-cleaning filler, 0.1-3 parts of an acid absorber, and 0-10 parts of a masterbatch; The barrier layer comprises the following components by weight: 70-80 parts of a second base resin, 10-20 parts of a second polyolefin elastomer, 1-15 parts of an ultraviolet barrier filler, 0.1-3 parts of an antioxidant, and 0.1-3 parts of a light stabilizer; The base layer comprises the following components by weight: 80-90 parts of a third base resin and 10-20 parts of a third polyolefin elastomer.

2. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: The first base resin, the second base resin, and the third base resin are each independently selected from at least one of PE resin, PP resin, and EVA resin; The first polyolefin elastomer, the second polyolefin elastomer, and the third polyolefin elastomer are each independently selected from at least one of Dow VERSIFY 2200, Dow VERSIFY 2300, Dow VERSIFY 3200, Dow VERSIFY 3401, Vistamaxx 3000, and Vistamaxx 6000.

3. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: In the weather-resistant layer, the mass ratio of the first base resin to the first polyolefin elastomer is (2.2-3):

1.

4. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: In the barrier layer, the mass ratio of the second base resin to the second polyolefin elastomer is (4-6):

1.

5. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: In the base layer, the mass ratio of the third base resin to the third polyolefin elastomer is (5-6):

1.

6. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: Having at least one of the following characteristics: (1) The self-cleaning filler is super hydrophilic inorganic silicon nanoparticles; (2) The acid absorbent comprises at least one of hydrotalcite, calcium stearate and zinc oxide; (3) The UV blocking filler includes at least one of zinc oxide, magnesium oxide and titanium dioxide.

7. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: The thickness ratio of the weather-resistant layer, the barrier layer and the base layer is (0.5-2) : 1 : (2-3); Preferably, the thickness of the functional layer is 0.1-0.3 mm.

8. The weather-resistant and anticorrosive film material according to claim 1, characterized in that: Having at least one of the following characteristics: (1) The thickness of the self-adhesive layer is 0.25 to 0.7 mm; (2) The self-adhesive layer is a modified butyl rubber layer; (3) The release film layer includes at least one of a PE film, a PP film and a PET film.

9. The method for preparing the weather-resistant and anticorrosive film material according to any one of claims 1 to 8, characterized in that: The steps include: (a) mixing, melt-extruding and granulating the weather-resistant layer, the barrier layer and the base layer according to the composition ratio, respectively, to obtain weather-resistant layer granules, barrier layer granules and base layer granules; (b) co-extruding the weather-resistant layer pellets, the barrier layer pellets and the base layer pellets by film blowing or co-extrusion casting to obtain a functional layer; (c) The functional layer and the release film layer are compounded by using a self-adhesive layer to obtain the weather-resistant and anti-corrosion film material.

10. Use of the weather-resistant and anticorrosive membrane material according to any one of claims 1 to 8 in the protection of building roofs.

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