A butyl rubber thin TPO coil and its preparation method and application

Abstract

The present invention discloses a butyl rubber thin TPO coil and its preparation method and application, belonging to the field of waterproof technology. The butyl rubber thin TPO coil provided by the present invention comprises a TPO substrate layer and a butyl rubber layer which are stacked; the raw materials for preparing the TPO substrate layer include TPO, POE and light calcium carbonate; the raw materials for preparing the butyl rubber layer include butyl rubber, tackifying resin, active filler, sodium salt, metal acid salt, tetraethyl orthosilicate, isobutyl triethoxysilane and reactive auxiliary agent. The waterproof performance of the butyl rubber thin TPO coil provided by the present invention and the adhesion performance of the concrete-based substrate are significantly improved. The present invention also provides a preparation method and application of the above-mentioned butyl rubber thin TPO coil.

Description

Technical Field

[0001] The invention relates to the technical field of waterproofing, and in particular to a butyl rubber thin TPO coiled material and a preparation method and application thereof. Background Art

[0002] Thermoplastic polyolefin (TPO) self-adhesive waterproofing membrane consists of TPO sheet, polymer self-adhesive layer and isolation material. The main waterproof material TPO has excellent weather resistance and weldability. It is ready to use and firmly bonded to the basic structure layer. It is suitable for waterproofing projects such as underground building floors, composite structure side walls, dark tunnels and building roofs. The surface of TPO self-adhesive waterproofing membrane is coated with a high-performance self-adhesive layer, which can achieve full adhesion with the base layer. The membranes are welded by hot air to form a closed and continuous waterproof layer, which can adapt to the influence of structural deformation on the waterproof layer and ensure the integrity of the waterproof system.

[0003] However, it was found during use that the traditional thermoplastic polyolefin self-adhesive waterproof membrane has reduced adhesion to the underlying structure in extreme temperature (such as extremely low temperature) and extreme humidity environments, and is prone to problems such as warping. Slight damage can easily cause serious water leakage. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a butyl rubber thin TPO roll material, which can effectively improve the waterproof performance of the butyl rubber thin TPO roll material, the adhesion performance of the substrate, especially the concrete-based substrate, and the self-healing performance.

[0005] The invention also provides a method for preparing the above-mentioned butyl rubber thin TPO coil.

[0006] The invention also provides application of the above-mentioned butyl rubber thin TPO coil.

[0007] According to an embodiment of the first aspect of the present invention, there is provided a butyl rubber thin TPO coil, the butyl rubber thin TPO coil comprising a TPO substrate layer and a butyl rubber layer stacked;

[0008] The raw materials for preparing the TPO substrate layer include TPO, POE and light calcium carbonate;

[0009] The raw materials for preparing the butyl rubber layer include butyl rubber, tackifying resin, active filler, sodium salt, metal acid salt, tetraethyl orthosilicate, isobutyl triethoxysilane and reactive auxiliary agent.

[0010] The butyl rubber thin TPO coil according to the embodiment of the present invention has at least the following beneficial effects:

[0011] (1) In the butyl rubber thin TPO coil provided by the present invention, the TPO substrate layer includes light calcium carbonate, and the butyl rubber layer includes active fillers, tetraethyl orthosilicate and isobutyl triethoxysilane; therefore, after the butyl rubber thin TPO coil is attached to the concrete base, the reaction product of tetraethyl orthosilicate and isobutyl triethoxysilane can penetrate into the concrete gap on the one hand to improve the waterproof performance, and on the other hand, the reaction product can also undergo secondary hydration with the components in the concrete to improve the adhesion between the butyl rubber layer and the concrete base, and on the other hand, the reaction product has a strong affinity for light calcium carbonate, thereby further improving the adhesion strength between the butyl rubber layer and the TPO substrate layer; the similarity between the active filler and the concrete can also improve the adhesion strength between the butyl rubber layer and the concrete base. It can be seen that the invention significantly improves the adhesion strength between the TPO substrate layer, the butyl rubber layer and the concrete base by adjusting the material.

[0012] (2) The raw materials for preparing the TPO substrate layer provided by the present invention include POE and calcium carbonate in addition to TPO, thereby reducing the flexibility, light and heat aging resistance and mechanical strength of the butyl rubber thin TPO coil, thereby improving the mechanical adaptability and service life of the butyl rubber thin TPO coil to different shapes, and at the same time, on the basis of requiring the same mechanical strength, appropriately reducing the thickness of the butyl rubber thin TPO coil.

[0013] (2) In the butyl rubber layer provided by the present invention, the expansion agent, sodium salt and reactive auxiliary agent can participate in the hydration reaction of cement in concrete. At the same time, the expansion agent will expand slightly to form an anchoring structure at the interface between the butyl rubber layer and the concrete base. The newly generated product can enhance the interface strength, that is, the butyl rubber provided by the present invention itself has a certain waterproof ability and self-healing ability; therefore, even if an external force destroys the concrete covered with the butyl rubber thin TPO membrane in a small range, the concrete still has a certain waterproof performance, which provides sufficient time buffer for subsequent maintenance.

[0014] According to some embodiments of the present invention, the TPO is at least one of polyethylene, polypropylene and polyethylene-propylene.

[0015] According to some embodiments of the present invention, the polyethylene is linear polyethylene, for example, low-density linear polyethylene.

[0016] According to some embodiments of the present invention, the POE includes at least one of LyondellBasell POE / X100G, Exxon 6102, DuPont 8150 and DuPont 8200. The selected POE has good compatibility with the light calcium carbonate and can significantly improve the flexibility of the obtained TPO substrate layer.

[0017] According to some embodiments of the present invention, the mass ratio of TPO to POE is 1 to 2:1, for example, about 1.5:1.

[0018] According to some embodiments of the present invention, the light calcium carbonate can pass through a 1000 mesh sieve, and specifically can pass through a 1250 mesh sieve.

[0019] According to some embodiments of the present invention, the mass percentage of the light calcium carbonate in the TPO substrate layer is 10-20%, for example, about 12%, 15%, 17% or about 19%.

[0020] According to some embodiments of the present invention, the tackifying resin contains terminal hydroxyl groups, so that the terminal hydroxyl groups can react with calcium ions in concrete to form a complex, thereby significantly increasing the activity of the tackifying resin and increasing the chemical bonding between the butyl rubber layer and the concrete interface.

[0021] According to some embodiments of the present invention, the tackifying resin includes at least one of C5 petroleum resin, C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, rosin resin, rosin pentaerythritol ester, rosin glycerol resin, terpene resin and phenolic resin.

[0022] According to some embodiments of the present invention, the tackifying resin is a mixture of rosin glycerol resin and C5 hydrogenated petroleum resin. The mass ratio of the rosin glycerol resin to the C5 hydrogenated petroleum resin is 1:1.5 to 2.5. For example, it can be about 1:2. As a result, the compatibility between the tackifying resin and other components is significantly improved.

[0023] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the tackifying resin is 100:20-25, for example, about 100:21, 100:22 or about 100:23.

[0024] According to some embodiments of the present invention, the active filler includes at least one of bauxite, soda ash, quicklime, fly ash and calcined kaolin.

[0025] According to some embodiments of the present invention, the active filler is at least one of fly ash and calcined kaolin, wherein the mass ratio of the fly ash to the calcined kaolin is 2 to 4:1, for example, specifically about 3:1.

[0026] According to some embodiments of the present invention, the active filler can pass through a 1000-mesh sieve, for example, a 1250-mesh sieve, or a 3000-mesh sieve.

[0027] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the active filler is 100:13-18, for example, about 100:14, 100:15 or about 100:16.

[0028] According to some embodiments of the present invention, the sodium salt includes at least one of sodium carbonate (CAS: 497-19-8) and sodium silicate (CAS: 1344-09-8).

[0029] According to some embodiments of the present invention, the sodium salt includes sodium carbonate and sodium silicate, wherein the mass ratio of the sodium carbonate to the sodium silicate is 1:2 to 4, for example, specifically about 1:3.

[0030] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the sodium salt is 100:10-15, for example, about 100:11, 100:12 or about 100:13.

[0031] According to some embodiments of the present invention, the silicate includes at least one of sodium silicate and potassium silicate.

[0032] According to some embodiments of the present invention, the aluminate includes at least one of sodium aluminate and potassium aluminate.

[0033] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the expansion agent is 100:15-18, for example, about 100:16 or about 100:17.

[0034] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the tetraethyl orthosilicate (CAS: 78-10-4) is 100:0.5-3. For example, it may be about 100:1, 100:1.5 or about 100:2.

[0035] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the isobutyltriethoxysilane (CAS: 17980-47-1) is 100:0.5-3. For example, it may be about 100:1, 100:1.5 or about 100:2.

[0036] According to some embodiments of the present invention, the reactive auxiliary agent includes at least one of carboxylates, benzene sulfonates, lignin sulfonates and citrates.

[0037] The carboxylate salt includes at least one of sodium acetate (CAS: 127-09-3) and potassium acetate (CAS: 127-08-2);

[0038] The benzenesulfonate salt includes at least one of sodium benzenesulfonate (CAS: 515-42-4) and potassium benzenesulfonate (CAS: 934-55-4);

[0039] The lignin sulfonate includes sodium lignin sulfonate (CAS: 8061-51-6);

[0040] The citrate includes sodium citrate (CAS: 68-04-2).

[0041] According to some embodiments of the present invention, the reactive auxiliary agent includes sodium lignin sulfonate.

[0042] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the reactive auxiliary agent is 100:0.5 to 3. For example, it may be about 100:1, 100:1.5, 100:2 or about 100:2.5.

[0043] According to some embodiments of the present invention, the raw materials for preparing the butyl rubber layer also include a processing aid.

[0044] According to some embodiments of the present invention, the processing aid includes at least one of a lubricant, an anti-aging agent and a cross-linking agent.

[0045] in,

[0046] The lubricant includes calcium stearate (CAS: 1592-23-0);

[0047] The anti-aging agent includes at least one of 2,2'-thiobis(4-tert-octylphenoloxy)nickel (CAS: 14516-71-3), tris(1,2,2,6,6-pentamethylpiperidinyl)phosphite (CAS: 1221592-86-4), 4-benzoyloxy-2,2,6,6-tetramethylpiperidine (CAS: 144217-65-2), 2,4,6-tris(2'-n-butoxyphenyl)-1,3,5-triazine (CAS: 853315-90-9) and hexamethylphosphoric triamide (CAS: 680-31-9).

[0048] The cross-linking agent includes at least one of sulfur (CAS: 7704-34-9), p-benzoquinone (CAS: 106-51-4) and zinc oxide (CAS: 1314-13-2).

[0049] According to some embodiments of the present invention, the processing aid includes a lubricant, an anti-aging agent and a cross-linking agent; wherein the mass ratio of the lubricant to the anti-aging agent is 3 to 5:1, for example, specifically about 4:1; the mass ratio of the anti-aging agent to the cross-linking agent is 1:0.8 to 1.2, for example, specifically about 1:1.

[0050] According to some embodiments of the present invention, the mass ratio of the butyl rubber to the processing aid is 100:12-13 parts, for example, about 100:12.5.

[0051] According to some embodiments of the present invention, the thickness of the TPO substrate layer is 0.5-1.0 mm, for example, about 0.6 mm, 0.7 mm or about 0.8 mm.

[0052] According to some embodiments of the present invention, the thickness of the butyl rubber layer is 0.3-0.5 mm, for example, about 0.4 mm.

[0053] According to an embodiment of the second aspect of the present invention, a method for preparing the thin butyl rubber TPO coil is provided, and the preparation method comprises the following steps:

[0054] S1. The raw materials for preparing the TPO substrate layer are mixed and melt-extruded to obtain the TPO substrate layer;

[0055] Mixing and kneading the raw materials for preparing the butyl rubber layer except the reactive auxiliary agent to obtain a mixed raw material for the butyl rubber layer;

[0056] S2. Laying the butyl rubber layer mixed raw material on one side surface of the TPO substrate layer.

[0057] Since the preparation method adopts all the technical solutions of the butyl rubber thin TPO coiled material in the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment. Furthermore, the method provided by the present invention is simple, easy to implement, and convenient for large-scale promotion.

[0058] According to some embodiments of the present invention, in step S1, the temperature of the melt extrusion is 180-250°C, for example, about 200°C, 220°C or about 230°C.

[0059] According to some embodiments of the present invention, step S1 further comprises hot pressing after the melt extrusion. The temperature of the hot pressing is 150-200° C. For example, it may be about 160° C., 170° C., 180° C. or about 190° C.

[0060] According to some embodiments of the present invention, in step S1, the temperature of the mixing and kneading is 150-180°C, for example, about 160°C, 165°C or about 170°C.

[0061] According to some embodiments of the present invention, in step S1, the mixing and kneading time is 10 to 30 minutes, for example, about 15 minutes or about 20 minutes.

[0062] According to some embodiments of the present invention, in step S2, the laying temperature is 50-80°C, for example, about 60°C, 65°C or about 70°C.

[0063] According to an embodiment of the third aspect of the present invention, there is provided an application of the thin butyl rubber TPO membrane in the field of building waterproofing.

[0064] Since the application adopts all the technical solutions of the butyl rubber thin TPO coil material of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment.

[0065] According to some embodiments of the present invention, in the field of building waterproofing, the material of the parts that need to be waterproofed includes at least one of metal material and concrete material.

[0066] If there is no special explanation, the actual meaning of “about” in the present invention is that the error is allowed to be within the range of ±2%, for example, about 100 is actually 100±2%×100.

[0067] Unless otherwise specified, “between” in the present invention includes the number itself, for example, “between 2 and 3” includes the endpoint values ​​2 and 3.

[0068] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. DETAILED DESCRIPTION

[0069] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0070] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0071] If there is no special description, in the specific implementation mode, the preparation raw material information is as follows:

[0072] TPO, a linear low-density polyethylene resin, was purchased from Maoming Petrochemical (distributor Ningbo Xiangyuan Plastic Co., Ltd.), brand 2426K; item number s35465465;

[0073] POE, purchased from DuPont, model 8200;

[0074] Light calcium carbonate, which can pass 1250 mesh, was purchased from Jingxian Weida New Materials Co., Ltd.;

[0075] Butyl rubber was purchased from EXXON, model 268;

[0076] Rosin glycerol resin was purchased from Songchuan Chemical, model number RE85;

[0077] C5 hydrogenated petroleum resin was purchased from Eastman;

[0078] Calcined kaolin was purchased from Foshan Bozhen Chemical Co., Ltd. and could pass through a 3000-mesh sieve;

[0079] Fly ash was purchased from Tangshan Mingzhongyuan Industrial Co., Ltd. and could pass through a 1250-mesh sieve;

[0080] The expansion agent is silicate-aluminate expansion agent purchased from Beijing Haiyan Xingye Concrete Admixture Co., Ltd., model ASEA;

[0081] The UV light stabilizer is tris(1,2,2,6,6-pentamethylpiperidinyl)phosphite.

[0082] Example 1

[0083] In this example, a butyl rubber thin TPO coil was prepared, and the specific steps were as follows:

[0084] Preparation of TPO substrate layer: the raw materials for preparing the TPO substrate layer are placed in a high-speed mixer and mixed evenly, then melted and extruded through a twin-screw extruder, and hot-pressed into shape; wherein,

[0085] In the preparation raw materials, the mass ratio of TPO and POE is 1:1; the added light calcium carbonate accounts for 10% of the total mass of the preparation raw materials;

[0086] The temperature of melt extrusion is 220°C; the temperature of hot pressing molding is 180°C; the thickness of the TPO substrate layer obtained by extrusion molding is 0.7 mm;

[0087] Preparation of butyl rubber layer mixture: Mix and knead the raw materials for preparing the butyl rubber layer at 165° C. for 15 minutes;

[0088] The TPO substrate layer is heated to 65°C, the temperature of the butyl rubber layer mixture is lowered to 65°C, and the obtained butyl rubber layer mixture is laid on the surface of the TPO substrate layer with a laying thickness of 0.4 mm.

[0089] By weight, the raw materials for preparing the butyl rubber layer are as follows:

[0090]

[0091]

[0092] Example 2

[0093] This example prepares a butyl rubber thin TPO coil, which is different from Example 1 in that:

[0094] (1) The mass ratio of TPO to POE is 2:1;

[0095] (2) The dosage of light calcium carbonate is 18%.

[0096] Comparative Example 1

[0097] This example prepares a butyl rubber thin TPO coil, which is different from Example 1 in that:

[0098] Light calcium carbonate is not included in the TPO substrate layer.

[0099] Comparative Example 2

[0100] This example prepares a butyl rubber thin TPO coil, which is different from Example 1 in that:

[0101] The raw materials for preparing the butyl rubber layer do not include ethyl orthosilicate and isobutyl triethoxysilane.

[0102] Comparative Example 3

[0103] This example prepares a butyl rubber thin TPO coil, which is different from Example 1 in that:

[0104] The raw materials for preparing the butyl rubber layer do not include expansion agent.

[0105] Test Case

[0106] In this example, the peel strength and low temperature flexibility of the butyl rubber thin TPO roll obtained in the example and the comparative example were tested. The specific test method was based on the national standard document numbered GB / T 23260-2009, and the bonding object was replaced by a clean concrete surface instead of an aluminum plate. The peel strength of the butyl rubber thin TPO roll was also tested after being pierced by a 1mm diameter needle and immersed in water. The test results are shown in Table 1.

[0107] Table 1 Peel strength of butyl rubber thin TPO membrane obtained in Examples and Comparative Examples

[0108] Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Low temperature flexibility -40℃ No cracks No cracks No cracks No cracks No cracks Peel strength N / mm 2.5 2.3 1.73 1.68 2.04 Peel strength after thermal aging N / mm 2.3 2.2 1.48 1.41 1.80 Peel strength after immersion in water N / mm 2.37 2.25 1.56 1.32 1.83 Needle-peel strength after immersion in water N / mm 2.15 2.01 1.38 1.09 0.8

[0109] According to the above results, the butyl rubber thin TPO roll provided by the present invention has excellent low-temperature flexibility, strong peel strength, and excellent heat aging resistance / water immersion resistance / needle puncture resistance; it can be seen that the butyl rubber thin TPO roll provided by the present invention can be used for the waterproofing of the side walls and roofs of buildings, and has good performance.

[0110] By comparing Example 1 and Example 2, it can be seen that if the amount of POE is reduced and the amount of light calcium carbonate in the TPO substrate layer is increased, on the one hand, the heat aging resistance of the obtained butyl rubber thin TPO coil is increased, but the hardness of the obtained TPO substrate layer will be increased (although it still meets the requirements), thereby overall reducing the adhesion strength of the obtained butyl rubber thin TPO coil to a certain extent.

[0111] By comparing Example 1 and Comparative Example 1, it can be seen that if the light calcium carbonate in the TPO coil layer is omitted, the adhesion strength between the TPO substrate layer and the butyl rubber layer decreases, resulting in a decrease in the overall adhesion strength; at the same time, the omission of light calcium carbonate also significantly reduces the heat aging resistance of the obtained butyl rubber thin TPO coil.

[0112] By comparing Example 1 and Comparative Example 2, it can be seen that if tetraethyl orthosilicate and isobutyl triethoxysilane are omitted from the butyl rubber layer, the waterproof performance brought by them is significantly reduced, and the water immersion performance of the resulting butyl rubber thin TPO membrane is significantly reduced.

[0113] By comparing Example 1 and Comparative Example 3, it can be seen that if the expansion agent is omitted in the butyl rubber layer, it cannot react with the cement component in the concrete, and thus the water immersion performance after needle puncture is significantly reduced.

[0114] By comparing the examples and comparative examples, it can be seen that when a certain component is omitted, the specific performance corresponding to the component will be significantly reduced, but at the same time the overall performance will also be reduced to a certain extent. It can be seen that in the butyl rubber thin TPO coil provided by the present invention, there is a significant synergistic effect between the various preparation raw materials.

[0115] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A butyl rubber thin TPO coil, characterized in that: The butyl rubber thin TPO coil comprises a TPO substrate layer and a butyl rubber layer which are stacked; The raw materials for preparing the TPO substrate layer include TPO, POE and light calcium carbonate; The raw materials for preparing the butyl rubber layer include butyl rubber, tackifying resin, active filler, sodium salt, expansion agent, tetraethyl orthosilicate, isobutyl triethoxysilane, and reactive auxiliary agent; The active filler comprises at least one of bauxite, soda ash, quicklime, fly ash and calcined kaolin; The expansion agent includes at least one of silicate and aluminate.

2. The butyl rubber thin TPO coil according to claim 1, characterized in that: The sodium salt includes at least one of sodium carbonate and sodium silicate; and / or the reactive auxiliary agent includes at least one of carboxylate, benzene sulfonate, lignin sulfonate and citrate.

3. The butyl rubber thin TPO coil according to claim 1, characterized in that: The tackifying resin contains terminal hydroxyl groups.

4. The butyl rubber thin TPO coil according to any one of claims 1 to 3, characterized in that: The mass ratio of the TPO to POE is 1-2:1; and / or the mass percentage of the light calcium carbonate in the TPO substrate layer is 10-20%.

5. The butyl rubber thin TPO coil according to any one of claims 1 to 3, characterized in that: The raw materials for preparing the butyl rubber layer satisfy at least one of the following conditions: (1) The mass ratio of the butyl rubber to the tackifying resin is 100:20-25; (2) The mass ratio of the butyl rubber to the active filler is 100:13-18; (3) The mass ratio of the butyl rubber to the sodium salt is 100:10-15; (4) The mass ratio of the butyl rubber to the swelling agent is 100:15-18; (5) The mass ratio of the butyl rubber to the tetraethyl orthosilicate is 100:0.5-3; (6) The mass ratio of the butyl rubber to the isobutyl triethoxysilane is 100:0.5-3; (7) The mass ratio of the butyl rubber to the reactive auxiliary agent is 100:0.5-3.

6. The butyl rubber thin TPO coil according to any one of claims 1 to 3, characterized in that: The raw materials for preparing the butyl rubber layer also include processing aids.

7. The butyl rubber thin TPO coil according to claim 6, characterized in that: The processing aid includes at least one of a lubricant, an anti-aging agent and a cross-linking agent; and / or the mass ratio of the butyl rubber to the processing aid is 100:12-13 parts.

8. The butyl rubber thin TPO coil according to any one of claims 1 to 3, characterized in that: The thickness of the TPO substrate layer is 0.5-1.0 mm; and / or the thickness of the butyl rubber layer is 0.3-0.5 mm.

9. A method for preparing a butyl rubber thin TPO coil according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1. The raw materials for preparing the TPO substrate layer are mixed and melt-extruded to obtain the TPO substrate layer; Mixing and kneading the raw materials for preparing the butyl rubber layer except the reactive auxiliary agent to obtain a mixed raw material for the butyl rubber layer; S2. Laying the butyl rubber layer mixed raw material on one side surface of the TPO substrate layer.

10. The preparation method according to claim 9, characterized in that: In step S1, the mixing and kneading temperature is 150-180°C; and / or, in step S2, the laying temperature is 50-80°C.

11. Use of the butyl rubber thin TPO membrane according to any one of claims 1 to 8 in the field of building waterproofing.

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