Ablation-resistant polymer composite waterproofing coiled material and preparation method thereof

Abstract

The present invention discloses an ablation-resistant polymer composite waterproof coiled material and a preparation method thereof. The ablation-resistant polymer composite waterproof coiled material has at least a three-layer structure: an ablation-resistant exposed upper layer, an intermediate waterproof layer and an ablation-resistant exposed lower layer; wherein the intermediate waterproof layer is arranged between the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer. The present invention also provides a preparation method for the ablation-resistant polymer composite waterproof coiled material, comprising: preparing raw materials for each layer, mixing and extruding them respectively, and obtaining raw material layers for each layer respectively; adopting in-mold co-extrusion composite processing, and cooling by a three-roll calender to obtain the ablation-resistant polymer composite waterproof coiled material. The present invention manufactures the ablation-resistant polymer composite waterproof coiled material through a three-layer composite processing technology, changes the material formula of the upper and lower exposed layers, so that it has the function of isolating high temperature and ablation resistance, and makes the polymer waterproof coiled material as a whole have ablation resistance, thereby preparing the ablation-resistant polymer composite waterproof coiled material.

Description

Technical Field

[0001] The invention relates to the technical field of waterproofing, in particular to an ablation-resistant polymer composite waterproofing coiled material and a preparation method thereof. Background Art

[0002] The single-layer waterproofing membrane roof system has the characteristics of long service life and excellent waterproof performance, which can provide long-lasting and safe protection for industrial building roofs. It is also the best choice for rooftop distributed photovoltaic power stations, truly achieving the same lifespan for buildings, distributed photovoltaics and roof enclosure systems. However, due to the welding of some metal brackets during the construction process, welding slag falls, causing the polymer waterproofing membrane to be burned by high-temperature dripping objects, resulting in leaks, which can cause fires when burned severely.

[0003] The polymer waterproofing membranes currently on the market do not have ablation resistance and generally have poor high temperature resistance. During the construction of photovoltaic roofs, they are inevitably damaged by high temperatures or cause fires. Summary of the invention

[0004] In view of this, the present invention proposes an ablation-resistant polymer composite waterproofing roll and a preparation method thereof. The ablation-resistant polymer composite waterproofing roll not only has the waterproof characteristics of a waterproofing roll, but also has ablation resistance, ensuring that it will not be burned at high temperatures, thereby ensuring the safety and reliability of the polymer waterproofing roll during long-term construction and use of the roof photovoltaic system.

[0005] The ablation-resistant polymer composite waterproof coiled material provided by the present invention has at least a three-layer structure: an ablation-resistant exposed upper layer, an intermediate waterproof layer and an ablation-resistant exposed lower layer; wherein the intermediate waterproof layer is arranged between the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer; wherein the raw materials of the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer include, by weight, 30 to 55 parts by weight of phenyl silicone rubber, 20 to 35 parts by weight of ablation-resistant filler, 15 to 25 parts by weight of reinforcing filler, 0.5 to 1 part by weight of coupling agent, 1 to 3 parts by weight of light stabilizer, 1 to 2 parts by weight of cross-linking agent, and 0.5 to 1 part by weight of antioxidant; the phenyl content in the phenyl silicone rubber is 15% to 50%; the phenyl content refers to the ratio of phenyl to silicon atoms.

[0006] Optionally, the phenyl silicone rubber is selected from at least one of a medium phenyl silicone rubber having a phenyl content of 15% to 25% and a high phenyl silicone rubber having a phenyl content of 30% to 50%.

[0007] Optionally, the thickness ratio of the ablation-resistant exposed upper layer, the middle waterproof layer and the ablation-resistant exposed lower layer is: 0.2:0.8:0.2-0.5:1.5:0.5.

[0008] Optionally, the thickness of the exposed ablation-resistant upper layer and the exposed ablation-resistant lower layer are both 0.2 mm to 0.5 mm; and the thickness of the middle layer is 0.8 mm to 1.5 mm.

[0009] Optionally, the ablation-resistant filler is selected from at least one of magnesium hydroxide, hollow glass microspheres and mica powder;

[0010] Optionally, the reinforcing filler is fumed silica, and its specific surface area is ≥300m2 / g;

[0011] Optionally, the coupling agent is selected from at least one of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 3-(2,3-epoxypropoxy)propyltrimethoxysilane and bis-[γ-(triethoxysilyl)propyl]tetrasulfide.

[0012] Optionally, the light stabilizer is selected from at least one of 2,2-thiobis(4-tert-octylphenol) n-butylamine nickel salt, hydroxyethyltetramethylpiperidinol and 1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate.

[0013] Optionally, the cross-linking agent is selected from at least one of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 2,4-dichlorobenzoyl peroxide and dicumyl peroxide.

[0014] Optionally, the antioxidant is selected from at least one of antioxidant 168, antioxidant B225 and antioxidant 1330.

[0015] Optionally, the raw materials of the intermediate waterproof layer include, by weight: 60-80 parts by weight of thermoplastic polyolefin, 15-30 parts by weight of filler, 0.5-0.8 parts by weight of light stabilizer, 0.5-1.5 parts by weight of antioxidant, and 2-4 parts by weight of titanium dioxide.

[0016] Optionally, the filler is calcium carbonate or magnesium hydroxide; the light stabilizer is light stabilizer 944 or light stabilizer 2020; and the antioxidant is antioxidant 168 or antioxidant B225.

[0017] Preferably, the ablation-resistant polymer composite waterproof membrane has at least one of the following properties:

[0018] A1. No cracks at temperatures between -65°C and -75°C;

[0019] A2. Dimensional change rate during heat treatment ≤ 0.30%;

[0020] A3, ablation resistance at 400℃ for 1h, mass fraction ≧98%;

[0021] A4, No flowing and no deformation at heat resistance temperature of 150℃ for 1h.

[0022] The preparation method of the ablation-resistant polymer composite waterproof coiled material provided by the present invention comprises: preparing raw materials for each layer of the ablation-resistant polymer composite waterproof coiled material, mixing and extruding them respectively, and obtaining a raw material layer for an ablation-resistant exposed upper layer, a raw material layer for an intermediate waterproof layer, and a raw material layer for an ablation-resistant exposed lower layer respectively; subjecting the raw material layer for the ablation-resistant exposed upper layer, the raw material layer for the intermediate waterproof layer, and the raw material layer for the ablation-resistant exposed lower layer to in-mold co-extrusion composite processing, and subjecting them to shaping and cooling by a three-roll calender to obtain the ablation-resistant polymer composite waterproof coiled material.

[0023] Preferably, the preparation method specifically comprises the following steps:

[0024] (1) preparing raw materials for the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer, stirring and mixing, and obtaining a mixed material A; adding the mixed material A into a twin-screw extruder for extrusion, and respectively serving as a raw material layer for the ablation-resistant exposed upper layer and a raw material layer for the ablation-resistant exposed lower layer;

[0025] (2) preparing raw materials for the middle waterproof layer, stirring and mixing, and obtaining a mixed material B; adding the mixed material B into a twin-screw extruder and extruding it as a raw material layer for the middle waterproof layer; the twin-screw extruder has a large output and can mix the materials evenly;

[0026] (3) The raw material layer of the ablation-resistant exposed upper layer, the raw material layer of the ablation-resistant exposed lower layer and the raw material layer of the intermediate waterproof layer are processed by in-mold co-extrusion and then shaped and cooled by a three-roll calender to obtain the ablation-resistant polymer composite waterproof membrane.

[0027] Beneficial effects:

[0028] The present invention manufactures ablation-resistant polymer composite waterproofing membrane through a three-layer composite processing technology. The present invention changes the single-layer formula structure of the original waterproofing membrane into a three-layer formula structure, adds phenyl silicone rubber and ablation-resistant filler to the formula of the upper and lower exposed layers, wherein the main chain of the silicone rubber is composed of silicon-oxygen bonds, the silicon-oxygen bonds have large bond energy, and its high temperature resistance is good. When the side chain of the silicone rubber molecule introduces a phenyl group to prevent the oxidative degradation of the side group and the thermal rearrangement degradation of the main chain, the material is endowed with high temperature resistance and ablation resistance. The present invention changes the formula of the upper and lower exposed layers, introduces ablation-resistant fillers into the formula, and the thermal stability of the ablation-resistant fillers blocks heat from invading the middle layer to play a role of heat insulation, heat reduction and ablation resistance, so that the polymer waterproofing membrane as a whole has ablation resistance, thereby preparing an ablation-resistant polymer composite waterproofing membrane. The ablation-resistant polymer composite waterproofing membrane product has excellent ablation resistance and high temperature resistance, thereby ensuring the safety and reliability of the polymer waterproofing membrane during the long-term construction and use of the roof photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For purposes of illustration and not limitation, the present invention will now be described in terms of preferred embodiments thereof, with particular reference to the accompanying drawings, in which:

[0030] Figure 1 This is a schematic diagram of the structure of the ablation-resistant polymer composite waterproofing membrane of the present invention;

[0031] Among them, 1. ablation-resistant exposed upper layer; 2. middle waterproof layer; 3. ablation-resistant exposed lower layer. DETAILED DESCRIPTION

[0032] The technical scheme of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0033] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0034] The medium phenyl silicone rubber (phenyl content 15%-25%) used in the following examples was purchased from Shanghai Aishibo Silicone Material Co., Ltd., with the product catalog number SR109H; the high phenyl silicone rubber (phenyl content 40%-50%) was purchased from Shanghai Aishibo Silicone Material Co., Ltd., with the product catalog number AH3016; the high phenyl silicone rubber (phenyl content 30%-40%) was purchased from Shanghai Aishibo Silicone Material Co., Ltd., with the product catalog number AH6011.

[0035] Example 1: Preparation of ablation-resistant polymer composite waterproofing membrane

[0036] like Figure 1 As shown, the ablation-resistant polymer composite waterproof roll provided in this embodiment has a three-layer structure: an ablation-resistant exposed upper layer 1, an intermediate waterproof layer 2 and an ablation-resistant exposed lower layer 3; wherein the intermediate waterproof layer 2 is arranged between the ablation-resistant exposed upper layer 1 and the ablation-resistant exposed lower layer 3.

[0037] Among them, the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are made of the following raw materials in parts by weight: 30 parts by weight of medium-phenyl silicone rubber (phenyl content 15%-25%), 20 parts by weight of magnesium hydroxide, 15 parts by weight of fumed silica (Cabot TS622), 0.5 parts by weight of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 1 part by weight of 2,2-thiobis(4-tert-octylphenol) n-butylamine nickel salt, 1 part by weight of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, and 0.5 parts by weight of antioxidant 168.

[0038] The middle waterproof layer is made of the following raw materials in parts by weight: 60 parts by weight of thermoplastic polyolefin (Dow Chemical 2300, USA), 15 parts by weight of filler calcium carbonate, 0.5 parts by weight of light stabilizer 944, 0.5 parts by weight of antioxidant 168, and 2 parts by weight of titanium dioxide.

[0039] The preparation method of the ablation-resistant polymer composite waterproof membrane comprises the following steps:

[0040] (1) The raw materials of the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are placed in a low-speed stirring tank according to the above formula, with a rotation speed of 25 r / min. After stirring for 30 minutes, the materials are taken out for use; the above materials are added to a twin-screw extruder and extruded as the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer.

[0041] (2) The raw materials of the middle waterproof layer are placed in a low-speed stirring tank according to the above formula, with a rotation speed of 25r / min. After stirring for 30 minutes, the materials are taken out for use; the above materials are added to a twin-screw extruder to extrude the middle waterproof layer.

[0042] (3) The in-mold co-extrusion composite processing technology is adopted, the extruder temperature is 185℃-195℃, the mold temperature is 195℃-205℃, and the line speed is 3m / min. The thickness of the exposed upper layer and the exposed lower layer is 0.2mm, and the thickness of the middle waterproof layer is 0.8mm. The ablation-resistant polymer composite waterproof membrane is obtained by shaping and cooling through a three-roll calender.

[0043] The chemical, physical and mechanical properties of the ablation-resistant polymer composite waterproof membrane of this embodiment were tested in accordance with the national standard GB27789-2011. The test results are shown in Table 1.

[0044] The conventional polymer waterproof membrane in Table 1 was purchased from Beijing Oriental Yuhong Waterproof Technology Co., Ltd., and the product catalog number is: PMT-3010.

[0045] Table 1 Test results of chemical, physical and mechanical properties of ablation-resistant polymer composite waterproof membrane in Example 1

[0046]

[0047] The test method is as follows:

[0048] (1) Ablation resistance test method: adjust the temperature of the muffle furnace to 400°C, put the sample into the crucible and put it into the muffle furnace after reaching the temperature. After 1 hour, take it out and put it into a desiccator to bring it to room temperature and weigh it. Calculate the mass percentage after taking it out and ablation.

[0049] (2) Heat resistance test method: The specimen is hung in a 150°C hot oven and taken out after 1 hour. The state of the specimen is observed to see if there is any softening, flow or deformation.

[0050] According to the above test method, the ablation resistance and heat resistance of the ablation-resistant polymer composite waterproof membrane of this embodiment were tested, and the test results are shown in Table 2.

[0051] The conventional polyolefin waterproof membrane in Table 2 was purchased from Beijing Oriental Yuhong Waterproof Technology Co., Ltd., and the product catalog number is: PMT-3010.

[0052] Table 2 Test results of ablation resistance and heat resistance of ablation resistant polymer composite waterproof membrane in Example 1

[0053]

[0054] According to the results in Table 1 and Table 2, it can be seen that the formula of Example 1 contains medium-phenyl silicone rubber, which can improve the ablation resistance and heat resistance of the composite waterproof membrane. At the same time, due to its thermal stability, the thermal dimensional change rate is more stable; its main material is medium-phenyl silicone rubber, and the ablation-resistant filler is magnesium hydroxide. The ablation-resistant temperature is 350°C, and it has good ablation-resistant and heat-insulating effects, but the mass fraction retention is not 100%.

[0055] Example 2: Preparation of ablation-resistant polymer composite waterproofing membrane

[0056] like Figure 1 As shown, the ablation-resistant polymer composite waterproof roll provided in this embodiment has a three-layer structure: an ablation-resistant exposed upper layer 1, an intermediate waterproof layer 2 and an ablation-resistant exposed lower layer 3; wherein the intermediate waterproof layer 2 is arranged between the ablation-resistant exposed upper layer 1 and the ablation-resistant exposed lower layer 3.

[0057] The ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are made of the following raw materials in parts by weight: 45 parts by weight of high phenyl (phenyl content 40%-50%) silicone rubber, hollow glass microspheres (Hebei Wensheng New Material Technology Co., Ltd., density: 0.15-0.6g / cm 3 ) 30 weight parts, fumed silica 20 weight parts, 3-(2,3-epoxypropoxy)propyltrimethoxysilane 0.8 weight part, hydroxyethyltetramethylpiperidinol 2 weight parts, 2,4-dichlorobenzoyl peroxide 1.5 weight parts, antioxidant B225 0.8 weight part.

[0058] The middle waterproof layer is made of the following raw materials in parts by weight: 70 parts by weight of thermoplastic polyolefin (LyondelBasel / CA10A, Netherlands), 20 parts by weight of magnesium hydroxide, 0.6 parts by weight of light stabilizer 2020, 0.8 parts by weight of antioxidant B225, and 3 parts by weight of titanium dioxide.

[0059] The preparation method of the ablation-resistant polymer composite waterproof membrane comprises the following steps:

[0060] (1) The raw materials of the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are placed in a low-speed stirring tank according to the above formula, with a rotation speed of 20 r / min, and the stirring time is 35 minutes, and then the materials are taken out for use; the above materials are added to a twin-screw extruder and extruded as the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer.

[0061] (2) The raw materials of the middle waterproof layer are placed in a low-speed stirring tank according to the above formula, with a rotation speed of 20 r / min, and the stirring time is 35 minutes, and then the materials are taken out for use; the above materials are added to a twin-screw extruder to extrude the middle waterproof layer.

[0062] (3) The in-mold co-extrusion composite processing technology is adopted, the thickness range of the exposed ablation-resistant upper layer and the exposed ablation-resistant lower layer is 0.5 mm, and the thickness range of the middle waterproof layer is 1.5 mm. The ablation-resistant polymer composite waterproof membrane is obtained by shaping and cooling through a three-roll calender.

[0063] The chemical, physical and mechanical properties of the ablation-resistant polymer composite waterproof membrane of this embodiment were tested in accordance with the national standard GB27789-2011. The test results are shown in Table 3.

[0064] Table 3 Test results of chemical, physical and mechanical properties of ablation-resistant polymer composite waterproof membrane in Example 2

[0065]

[0066] According to the same method as in the above-mentioned Example 1, the ablation resistance and heat resistance of the ablation-resistant polymer composite waterproof membrane of this example were tested, and the test results are shown in Table 4.

[0067] Table 4 Test results of ablation resistance and heat resistance of ablation resistant polymer composite waterproof membrane in Example 2

[0068]

[0069] According to the results of Table 3 and Table 4, it can be seen that the formula of Example 2 contains high phenyl silicone rubber, which can improve the ablation resistance and heat resistance of the composite waterproof membrane. At the same time, due to its thermal stability, the thermal dimensional change rate is more stable; its main material is high phenyl silicone rubber (the phenyl content in the embodiment is the highest), and the ablation-resistant filler is hollow glass microspheres. The ablation temperature can reach 600°C, and its vacuum structure can provide heat insulation effect, achieving the best ablation resistance effect, and can achieve 100% mass fraction retention, with the best ablation resistance effect.

[0070] Example 3: Preparation of ablation-resistant polymer composite waterproofing membrane

[0071] like Figure 1As shown, the ablation-resistant polymer composite waterproof roll provided in this embodiment has a three-layer structure: an ablation-resistant exposed upper layer 1, an intermediate waterproof layer 2 and an ablation-resistant exposed lower layer 3; wherein the intermediate waterproof layer 2 is arranged between the ablation-resistant exposed upper layer 1 and the ablation-resistant exposed lower layer 3.

[0072] Among them, the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are made of the following raw materials in parts by weight: 55 parts by weight of high-phenyl silicone rubber (phenyl content 30%-40%), 35 parts by weight of mica powder (Lingshou County Jiayuan Mineral Products Processing Plant / 800 mesh), 25 parts by weight of fumed silica, 1 part by weight of bis-[γ-(triethoxysilyl)propyl]tetrasulfide (Nanjing Xuanhao New Materials Technology Co., Ltd. / SI-69), 3 parts by weight of 1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidine) sebacate, 2 parts by weight of diisopropyl peroxide, and 1 part by weight of antioxidant 1330.

[0073] The middle waterproof layer is made of the following raw materials in parts by weight: 80 parts by weight of thermoplastic polyolefin (LyondelBasel / CA10A, Netherlands), 30 parts by weight of magnesium hydroxide, 0.8 parts by weight of light stabilizer 2020, 1.5 parts by weight of antioxidant B225, and 4 parts by weight of titanium dioxide.

[0074] The preparation method of the ablation-resistant polymer composite waterproofing membrane comprises the following steps:

[0075] (1) The raw materials of the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are placed in a low-speed stirring tank according to the above formula, the speed is 30r / min, and the stirring time is 20min, then the materials are taken out for use; the above materials are added into a twin-screw extruder to extrude as the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer.

[0076] (2) The raw materials of the middle waterproof layer are placed in a low-speed stirring tank according to the above formula, with a rotation speed of 30 r / min. After stirring for 20 minutes, the materials are taken out for use; the above materials are added to a twin-screw extruder to extrude the middle waterproof layer.

[0077] (3) The in-mold co-extrusion composite processing technology is adopted, the thickness range of the exposed ablation-resistant upper layer and the exposed ablation-resistant lower layer is 0.3 mm, and the thickness range of the middle waterproof layer is 1.0 mm. The ablation-resistant polymer composite waterproof membrane is obtained by shaping and cooling through a three-roll calender.

[0078] The chemical, physical and mechanical properties of the ablation-resistant polymer composite waterproof membrane of this embodiment were tested in accordance with the national standard GB 27789-2011. The test results are shown in Table 5.

[0079] Table 5 Test results of chemical, physical and mechanical properties of ablation-resistant polymer composite waterproof membrane in Example 3

[0080]

[0081] According to the same method as in the above-mentioned Example 1, the ablation resistance and heat resistance of the ablation-resistant polymer composite waterproof membrane of this example were tested, and the test results are shown in Table 6.

[0082] Table 6 Test results of ablation resistance and heat resistance of ablation-resistant polymer composite waterproof membrane in Example 3

[0083]

[0084] According to the results of Table 5 and Table 6, it can be seen that the formula of Example 3 contains high phenyl silicone rubber, which can improve the ablation resistance and heat resistance. However, since its phenyl content is not the highest, the thermal dimensional change rate stability is worse than that of Example 2; its main material is high phenyl silicone rubber, and the ablation-resistant filler is mica powder. The ablation temperature is 600°C, and it has a high-temperature ablation resistance effect, which can achieve 100% mass fraction retention and achieve a better ablation resistance effect.

[0085] Comparative Example 1

[0086] The ablation-resistant polymer waterproof membrane provided in this comparative example is a single-layer structure and is made of the following raw materials in parts by weight: 60 parts by weight of thermoplastic polyolefin (Dow Chemical 2300, USA), 16 parts by weight of phenyl silicone rubber (phenyl content 15%-25%), 15 parts by weight of magnesium hydroxide, 15 parts by weight of fumed silica (Cabot TS622), 0.5 parts by weight of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 15 parts by weight of filler calcium carbonate, 0.5 parts by weight of light stabilizer 944, 0.5 parts by weight of antioxidant 168, and 2 parts by weight of titanium dioxide.

[0087] The preparation method of the ablation-resistant polymer waterproofing membrane comprises the following steps:

[0088] The above raw materials are placed in a low-speed stirring tank according to the above formula, with a rotation speed of 25r / min, and the stirring time is 30min, then the materials are taken out for use; the above materials are added into a twin-screw extruder for extrusion, the extruder temperature is set to 185-195°C, and the three-roll calender is used for shaping and cooling to obtain the ablation-resistant polymer waterproof membrane.

[0089] The chemical, physical and mechanical properties of the ablation-resistant polymer composite waterproof membrane of this embodiment were tested in accordance with the national standard GB27789-2011. The test results are shown in Table 7.

[0090] Table 7 Test results of chemical, physical and mechanical properties of the ablation-resistant polymer waterproof membrane of Comparative Example 1

[0091]

[0092] According to the same method as in the above-mentioned Example 1, the ablation resistance and heat resistance of the ablation-resistant polymer composite waterproof membrane of this example were tested, and the test results are shown in Table 8.

[0093] Table 8 Test results of ablation resistance and heat resistance of ablation-resistant polymer composite waterproof membrane in comparative example 1

[0094]

[0095] According to the results of Table 7 and Table 8, it can be seen that Comparative Example 1 adopts a single-layer structure. Since phenyl silicone rubber and ablation-resistant filler are added to the formula, the ablation resistance and heat resistance of the waterproof membrane can be improved. At the same time, due to its thermal stability, the thermal dimensional change rate is more stable; therefore, the thermal dimensional change rate, ablation resistance and heat resistance effects are better than the performance indicators of conventional polyolefin waterproof membranes, but are inferior to the ablation resistance and heat resistance performance indicators of the ablation-resistant polymer composite waterproof membranes of Examples 1 to 3 of the present invention.

[0096] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Ablation-resistant polymer composite waterproofing membrane, characterized by: The ablation-resistant polymer composite waterproof coiled material has a three-layer structure: an ablation-resistant exposed upper layer, an intermediate waterproof layer and an ablation-resistant exposed lower layer; wherein the intermediate waterproof layer is arranged between the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer; wherein, The ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer are made of the following raw materials in parts by weight: 30 to 55 parts by weight of phenyl silicone rubber, 20 to 35 parts by weight of ablation-resistant filler, 15 to 25 parts by weight of reinforcing filler, 0.5 to 1 part by weight of coupling agent, 1 to 3 parts by weight of light stabilizer, 1 to 2 parts by weight of crosslinking agent, and 0.5 to 1 part by weight of antioxidant; The phenyl silicone rubber is a high-phenyl silicone rubber with a phenyl content of 30% to 50%.

2. The ablation-resistant polymer composite waterproofing coiled material according to claim 1, characterized in that: The thickness ratio of the ablation-resistant exposed upper layer, the middle waterproof layer and the ablation-resistant exposed lower layer is 0.2:0.8:0.2~0.5:1.5:0.

5.

3. The ablation-resistant polymer composite waterproofing membrane according to claim 2, characterized in that: The thickness of the exposed ablation-resistant upper layer and the exposed ablation-resistant lower layer are both 0.2 mm to 0.5 mm; the thickness of the intermediate waterproof layer is 0.8 mm to 1.5 mm.

4. The ablation-resistant polymer composite waterproofing membrane according to claim 1, characterized in that: The ablation-resistant filler is selected from at least one of magnesium hydroxide, hollow glass microspheres and mica powder; The reinforcing filler is fumed silica, with a specific surface area of ​​≥300m 2 / g; The coupling agent is selected from at least one of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 3-(2,3-epoxypropyloxy)propyltrimethoxysilane and bis-[γ-(triethoxysilyl)propyl] tetrasulfide; The light stabilizer is selected from at least one of 2,2-thiobis(4-tert-octylphenol) n-butylamine nickel salt, hydroxyethyltetramethylpiperidinol and 1-methyl-8-(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate; The cross-linking agent is selected from at least one of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 2,4-dichlorobenzoyl peroxide and dicumyl peroxide; The antioxidant is selected from at least one of antioxidant 168, antioxidant B225 and antioxidant 1330.

5. The ablation-resistant polymer composite waterproofing membrane according to claim 1, characterized in that: The raw materials of the intermediate waterproof layer include, by weight: 60-80 parts by weight of thermoplastic polyolefin, 15-30 parts by weight of filler, 0.5-0.8 parts by weight of light stabilizer, 0.5-1.5 parts by weight of antioxidant, and 2-4 parts by weight of titanium dioxide.

6. The ablation-resistant polymer composite waterproofing coiled material according to claim 5, characterized in that: The filler is calcium carbonate or magnesium hydroxide; The light stabilizer is light stabilizer 944 or light stabilizer 2020; The antioxidant is antioxidant 168 or antioxidant B225.

7. The ablation-resistant polymer composite waterproofing coiled material according to any one of claims 1 to 6, characterized in that: The ablation-resistant polymer composite waterproof membrane has at least one of the following properties: A1. No cracks at temperatures between -65°C and -75°C; A2. Heat treatment dimensional change rate ≤ 0.30%; A3, mass fraction after ablation resistance at 400℃ for 1h ≥ 98%; A4, No flowing and no deformation at heat resistance temperature of 150℃ for 1h.

8. The method for preparing the ablation-resistant polymer composite waterproof coiled material according to any one of claims 1 to 7, characterized in that: The preparation method comprises: preparing raw materials for each layer of the ablation-resistant polymer composite waterproof coiled material, mixing and extruding them respectively, and obtaining a raw material layer for the ablation-resistant exposed upper layer, a raw material layer for the middle waterproof layer, and a raw material layer for the ablation-resistant exposed lower layer respectively; The raw material layer of the ablation-resistant exposed upper layer, the raw material layer of the middle waterproof layer and the raw material layer of the ablation-resistant exposed lower layer are processed by in-mold co-extrusion and composite processing, and are shaped and cooled to obtain the ablation-resistant polymer composite waterproof coiled material.

9. The preparation method according to claim 8, characterized in that: The preparation method specifically comprises the following steps: (1) preparing raw materials for the ablation-resistant exposed upper layer and the ablation-resistant exposed lower layer, stirring and mixing, and obtaining a mixed material A; adding the mixed material A into a twin-screw extruder for extrusion, and respectively serving as a raw material layer for the ablation-resistant exposed upper layer and a raw material layer for the ablation-resistant exposed lower layer; (2) preparing raw materials for the intermediate waterproof layer, stirring and mixing, and obtaining a mixed material B; adding the mixed material B into a twin-screw extruder and extruding it as a raw material layer for the intermediate waterproof layer; (3) The raw material layer of the ablation-resistant exposed upper layer, the raw material layer of the ablation-resistant exposed lower layer and the raw material layer of the middle waterproof layer are processed by in-mold co-extrusion and then shaped and cooled by a three-roll calender to obtain the ablation-resistant polymer composite waterproof membrane.

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